Don’t Blame the Eater Essay

Most people know what they are doing by eating fast food, unhealthy food. People must understand and make it clear what is most important for them and for their kids. They have to keep them safe and think about future life. But what happened with personal responsibility? What about government responsibility? I think this is a big problem today and it needs to be fixed. The solving of this problem will help people to feel better and live longer. In fact, I believe, the people of America and government have to be responsible to try to fix it. Everybody loves to eat tasty food, don’t you or who doesn’t? When I was a kid, I would come from school and could smell my mom’s delicious pies. I even remember their pleasant fruit smell. There were so many kinds of them; they were with blueberries, strawberries, bananas and many others. But even of that time, I also remember, my mom always was trying to buy healthy and fresh food. Every morning she made me a snack with a lot of fruits, vegetables and also put a small chocolate candy for my dessert in my backpack. On the other hand, not all parents think about what their kids will eat during the day. All grownups are busy and they just giver their kids some money to go eat on their own. Children are buying what they want, for example, candy, chocolate and burgers, what is not healthy again. I think, this is biggest mistake of parents, because kids don’t care about food, they don’t have enough knowledge to understand, what is good, what is bad and not healthy for them. So with time, it could be dangerous for their lives, when people are not trying to fix this problem. At the same time, to consider unhealthy eating isn’t just parent’s problem or mistake, how I said before. It is all of American culture of eating and State in general. It’s exactly government problem too. Just think what you are watching on TV in the advertisements. All the time, every day, there are so many choices of fast food, fried chicken or pizza. The government needs to balance this problem, find the alternative and escape from it by right decision. If you decide to buy a grapefruit for your lunch, you probably could not find it in the city. Everywhere are fast food restaurants. For example, one week ago I went to the city and I was so hungry, I was trying to find a good quick food, but I couldn’t, so I got burger from McDonald’s. What does it mean? All these reasons have to be fixed or eliminated by government by putting more information to the people about what they exactly eat, how the food was prepared and etc. People need to watch more advertisements about healthy products and know how low-fat food will help them in their lives. Of cause, some people will not agree with me, but I don’t want to give my kids to be sick from unhealthy fat food at the future. People have to teach their kids from the beginning, try to explain them, what is better to eat every day. If this does not make, next generation will be in much more danger. Very often someone could think eating fast food is not a big problem either. However, I don’t agree and I want to be healthy person and it’s true that something needs to be change. The government has to solve that problem by opening more stores with a lot of different kinds of food. For example, it could be small fruits and vegetables groceries with many kinds of salads, whole wheat toasts, vegetables and fresh juices, where each person can buy his lunch. Also the government has to help people to make it easier and quicker by the right way. But does government really do it? It is a good question. The administration of America does not pay enough attention to the health of Americans. The Ministers often think more about benefits of sales fast food, because it is working very well, rather than on changes in the diet of citizens. This huge problem remains unsolved and will remain so, if people do not want to eat healthy food and do not want to be healthy too. It’s a ll depends on the morality of every person, as each of us builds his own health and own life.

Diabetes Mellitus Syndrome Chronic Hyperglycemia Health And Social Care Essay

Diabetess mellitus was described more than 2000 old ages ago, one time regarded as a individual entity disease impacting persons of higher socio economic strata but now even the person of lower economic strata are besides affected. It is a disease characterized by a province of hyperglycaemia ensuing from diversenesss of etiologies, environmental and familial playing jointly. By definition, diabetes mellitus is a syndrome characterized by chronic hyperglycaemia and perturbation of saccharides, protein and fat metamorphosis associated with absolute or comparative lack in insulin secernment and action. Harmonizing to WHO, there are two chief types of diabetes mellitus ie insulin dependant diabetes mellitus ( type I ) and non insulin dependant diabetes mellitus ( type II ) . Type II diabetes mellitus is a syndrome holding heterogenous and is associated with hazard of figure of complication like neurological, cardiovascular, nephritic, optic and musculoskeletal jobs. Out of these neurological and cardiovascular systems are normally affected. Diabetess is systemic upset of energy metamorphosis in which hyperglycaemia is the cellular opposition to the consequence of insulin or both. Diabetes affects both the cardinal and peripheral nervous system. Diabetic neuropathies are a household of nervus upset caused by diabetes. Peoples with diabetes can develop nervus harm throughout the organic structure. About 60 to 70 per centum of people with diabetes have some signifier of neuropathy. Peoples with diabetes can develop nerve jobs at any clip, but hazard rises with age and longer continuance of diabetes for more than 5 old ages. They appear to be more common in people who have jobs commanding their blood glucose besides called blood sugar. Type II diabetes is the most common signifier of diabetes and normally appears in center aged grownups. Approximately 60-70 % of type II persons develop diabetic neuropathy. It is frequently associated with fleshiness and may be delayed or controlled with diet and exercising. Diabetic neuropathy appears to be more common in people over 45 – 55 old ages of age. Causes: – Prolonged exposure to high blood sugar ( glucose ) can damage delicate nervus fibres, doing diabetic neuropathy. High blood glucose interferes with the ability of the nervousnesss to convey signals. It besides weakens the walls of the little blood vass that supply the nervousnesss with O and foods. Metabolic factors, such as high blood glucose, long continuance of diabetes and perchance low degrees of insulin. Neurovascular factors, taking to damage to the blood vass that carry O and foods to nervousnesss. Autoimmune factors that cause redness in nervousnesss. Clinical characteristics: – Functional instability Deep hurting most normally in the pess and legs Numbness Muscle failing Loss of sense of warm or cold Based on this Clinical characteristic that is functional instability, capable were evaluated with berg balance graduated table, incorporating 14 balance undertakings. Balance preparation to be an effectual agencies of forestalling falls in patients with diabetic neuropathy.1.1 STATEMENT OF THE PROBLEMThis is a survey on the effectivity of balance exercising in bettering balance in patients with diabetic neuropathy.1.2 AIMS AND OBJECTIVES OF THE STUDYTo happen out the effectivity of balance exercising in diabetic neuropathy patients1.3 NEED AND SIGNIFICANCE OF THE STUDYDiabetic neuropathy or nervus harm is a reasonably common diabetes related complication, approximately 60 % of individuals with diabetes have some grade of neuropathy and it is portion of regular tests and showings in individuals with diabetes about all individuals with diabetes will finally hold some signifier of neuropathy. Complication from neuropathy can run from mild to severe symptoms can include buzzing, firing o r prickling paraesthesia in the pess and increased hazard of falling. In this survey Berg balance graduated table was used to mensurate balance by measuring the public presentation of functional undertakings. This survey measure the effectivity of balance exercising to better balance in patients with diabetic neuropathy.1.4 HYPOTHESISNULL HYPOTHESISThere is no important difference in giving balance exercising to diabetic neuropathy patient.ALTERNATIVE HYPOTHESISThere is important difference in giving balance exercising to diabetic neuropathic patient.1.5 OPERATIONAL DEFINITIONSDIABETIC NEUROPATHY:Diabetic neuropathies are a household of nervus upsets that are associated with diabetes mellitus. These conditions are thought to ensue from diabetic micro vascular hurt affecting little blood vass that supply nervousnesss. Neuropathy is a nervus upset that consequences in deformation of nervus map.TYPE II DIABETES:Diabetess mellitus type II once called non insulin dependant diabetes mellitus or grownup oncoming diabetes is a upset that is characterized by high blood glucose in the context of insulin opposition and comparative insulin lack. It is a chronic disease characterized by high degrees of sugar in the blood. It develops when your organic structure does non react right to insulin.Balances:The ability to aline organic structure sections against gravitation to keep or travel the organic structure ( centre of mass ) within the available base of support without falling.2.REVIEW OF LITERATUREa ) Reappraisal of literature related to diabetic neuropathyRENUKA DHARMADHIKARI ( 2007 )Mellitus is a common disease in people with about 50 % of type 2 diabetic patients being over 45 to 55 old ages of age. Insulin opposition is common in people, with big Numberss besides have impaired insulin secernment. Exercise with a peculiar accent on balance and stableness is an of import constituent of the direction and intervention of diabetic neuropathy patients.D. FEEDLE, G. CUCINOTTA, DA GREENE ( 2005 )A common complication of diabetics called neuropathy was determined in diabetic patients recruited from 109 out diabetic clinics. An i ncreased consciousness of the high prevalence of neuropathy can take to early curative intercession and possible bar of ulterior neuropathic complication such as infection and pes ulcer.ALI CIMBIZ, OZGE ( 2004 )Diabetic neuropathy disturbed particularly the balance on the dominant leg. Done with 60 voluntary grownups of both sexes from Kuhatya, Turkey were divided in to two groups. A type 2 diabetic neuropathic group ( DG ) and a non diabetic control group ( CG ) . The CG was selected to fit the diabetic features such as age, organic structure mass and sex. Standing on dominant, non dominant leg and functional range were used for the appraisal.STEFANO BALDUCCIAN, GIAN LUCA, LEOLCA PARISIC ( 2004 )Exercise preparation can modify the natural history of diabetic neuropathy. This survey suggests for the first clip that long clip exercising preparation can forestall the oncoming or modify the natural history of diabetic neuropathy.MARK J BROWN, JOHN R. MARTIN, ARTHUR K, ASBURY ( 1996 )Di abetic patients whose neuropathy was characterized by hurting and autonomic disfunction with loss of balance and saving of musculus stretch physiological reactions.YASUDA H DYCK P ( 1987 )Hypothesized that neuropathy consequences from diseased developments in the little vass in diabetes by the observation of thickener of the walls of endoneurial capillaries in the nervus of diabetic patients as a consequence of an accretion of periodic Acid Schiff.B ) Reappraisal of literature related to balance and diabetic neuropathyANN V. SCHWARTZ AND TERESA A. HILLIER ( 2001 )Peoples with diabetic had increased hazard of falling in their survey conducted in patients with diabetic neuropathy. Postural stableness is the of import factor to keep the balance which reduces the hazard of autumn. Diabetic neuropathy topics may lose their Centre of force per unit area information for commanding postural sway in stance stage of pace.HORAK FBB, DICKSTERIN R AND PETERCA R.J. ( 1998 )Concluded that diabetic patients with neuropathy show higher scope and root mean square value compared with those of control topics and diabetic patients with out neuropathy quiet standing balance was investigated in 24 diabetic patients with or with out neuropathy with eyes opened and eyes closed.DANIK LAFOND, HELENE CORIVEA AND FRANCIOS PRINCE ( 1998 )Motor schemes at the mortise joint articulation are altered in diabetic neuropathy patients in his work subjected for postural control mechanism during quiet standing in patients with diabetic neuropathy.BEVERLEIGH H PIEPERSA ( 1996 )Many as one in two people with type 2 diabetes finally develops a status of chronic nervus harm in their pess known as diabetic neuropathy. Diabetic are at greater hazards for falls when they have fewer centripetal inputs to counterbalance for the loss of experiencing in their pess. Closing your eyes, or walking a across a dark room will ensue in more falls. Even standing on one pes is harder for a diabetic to make with their eyes closed, but easier if eyes are unfastened.TABASSOM GHANAVATI, ALI ASGHAR ARASTOO: ( 1995 )Diabetic neuropathy patients seems to do postural instability which may impact quality of maps and activities of day-to-day life of these patients.ROTHWELL ( 1994 )Ocular vestibular and proprioceptive subsystem response to somewhat different perturbation in balance. The visuo spinal system controls both inactive and faster inputs with proprioceptive system which is besides Sensitive to faster stimulation.LORD ET.AL ( 1994 )A survey in Australia reported that hapless balance is a factor in the causal tract between diabetes and increase hazard of falling. Thus the persons with diabetes had increased organic structure sway.degree Celsius ) Review of literature related to consequence of exercising programme on balance upsetEMILY SPLICHAL: ( 1996 )Diabetic neuropathy causes loss of distal strength and esthesis. Research has shown that diabetics with neuropathy are 15 times more likely to descri be falling or faltering in a one twelvemonth period. Research has proven balance preparation to be an effectual agencies of forestalling falls in patient with diabetic neuropathy. All balance exercising can be done in a patient place with small or no equipment.RICHARDSON J.K, SANDMAN D, VELA S.A ( 1995 )Focused exercising regimen improves Clinical steps of balance in patients with diabetic neuropathy. Participants are 20 topics with diabetes mellitus and diagnostically confirmed patient. Ten subjects underwent a 3 hebdomad intercession exercising regimen designed to increase quickly available distal strength and balance. The other 10 topics performed a control exercising regimen. The intercession topics but non the control subjects, showed important betterment in all 3 clinical steps of balance that is impedal stance clip, Functional range and tandem stance clip.vitamin D ) Review of literature related to berg balance graduated tableTRINA SMITH ( 2005 )Berg Balance Scale used to qua ntify the balance of patients with diabetic neuropathy. Twenty one female and five males were selected. Participants completed each balance trial one time during 2 testing Sessionss for that inter rates dependability was good for the BBS. The balance trial showed moderate to good dependability for this population. The BBS appear to be valid steps of motor ability to keep balance.GATEV ( 1999 )Balance trials have been developed and presented to obtain appropriate information of balance measuring. The choice of mensurating clip and stance conditions is indispensableALEXANDER ( 1996 )Balance trial have been developed and presented to obtain appropriate information of balance capablenesss during standing. Functional balance graduated tables are easy to execute and suitable for daily clinical usage that give more elaborate information about balance.BEIG ETAL ( 1995 )Berg Balance Scale in patients with damage of balance. It is a staff completed assessment graduated table of ability to kee p balance either statistically or while executing assorted functional motions to assist do determinations about the patients equilibrate degree, comprises 14 discernible undertakings common to every twenty-four hours life.3. RESEARCH DESIGN AND METHODOLOGY3.1 REASEARCH DESIGNThis survey belongs to experimental design.3.2 Variables USED IN THE STUDY3.2.1 Independent variablesBalance exercising Medical intervention3.2.2 Dependent variableBalance3.3 Setting OF THE STUDY:Physiotherapy Rehabilitation Centre, Kannur3.4 CRITERIA FOR SELECTIONInclusion standardsDiabetess with a continuance of more than 5 old ages Type 2 diabetes with diagnosed neuropathy Persons between the age group of 45-55 old ages were selected. Both males and females wee included in this survey. Patients who reported atleast one autumn in the past 6 monthsExclusion standardsLower appendage amputation Patients with inability to walk without any assistive devices Patients with musculoskeletal damage Patients with neurological damage Diabetess with any other systemic engagement3.5 SAMPLE POPULATION30 Capable and 15 in each group3.6 METHOD OF SAMPLINGRandom Sampling Technique.3.7 METHODOLOGY30 Subjects are selected and divided in to two groups The process was explained to subject. GROUP A: Balance exercising with medical intervention GROUP B: Medical intervention3.8 Materials USEDRuler Two standard chairs ( one with a arm rests, one without ) Foot stool Stop ticker or carpus ticker Berg balance graduated table Outcome measuring by utilizing Berg Balance graduated table3.9 DURATION OF THE STUDY:Four hebdomads3.10 ProcedureThe topics were given balance exercising like inactive and dynamic exercising for five yearss for four hebdomads. Entire intervention clip was 60 proceedingss /session/ twenty-four hours with 5 minute remainder after every 15 proceedingss.Balance exercisingImprove balance by executing simple balance exercising. The individual leg stance is a really effectual exercising for bettering balance. This exercising can be modified balance stableness. The exercisings are categorized in to two different types inactive and dynamic of balance preparation.Inactive exercisingToe base Tandum base One – legged base Heel baseDynamic exercising in walkingToe walk Tandum forward walk Heel walk Tandum backward walk1. Toe base†¢ Stand about one and a half pess off from the counter. †¢ Raise up every bit high as possible on the balls of your pess. Your pess should be shoulder width apart. †¢ Try to remain every bit still as possible. Make non travel your pess around to keep balance. †¢ Hold the toe base for 10 seconds. Rest. Repeat 5 times.2. Tandem Stand†¢ Stand about one and a half pess off from the counter. †¢ Place one pes straight in forepart of the other pes so that the heel of one pes is merely touching the toes of the other pes. †¢ Try to remain every bit still as possible. Make non travel your pess around to keep balance. †¢ Hold the tandem base for 10 seconds. Rest. Repeat 5 times.3. One-legged BaseStand about one and a half pess off from the counter. Slowly lift one leg off of the floor, while keeping your balance with the other leg. Try to remain every bit still as possible. Make non travel your pes around to keep balance. Keep the one-legged base for 10 seconds. Rest. Repeat with other leg 5 times.4. Heel StandStand about one and a half pess off from the counter. Raise up every bit high as possible on the heels of your pess. Your pess should be shoulder width apart. Try to remain every bit still as possible. Make non travel your pess around to keep balance. Keep the heel base for 10 seconds. Rest. Repeat 5 times.Dynamic exercising1. Toe walki »? †¢ Go to one terminal of a hall and easy raise up every bit high as you can onto your toes. Walk down the hall on your toes. †¢ When you reach the other side, come down onto your pess and stand usually. †¢ Rest. Repeat 5 times.2. i »? Tandem Forward WalkTravel to one terminal of a hall and topographic point one pes in forepart of the other so that the heel of one pes touches the toes of the other pes. Walk down the hall in a tandem walk. It is of import that with each measure the heel of one pes touches the toes of the other. If you make a error, merely topographic point one pes in forepart of the other and go on down the hall. When you reach the other side stand usually. Rest. Repeat 5 times.3. Heel WalkTravel to one terminal of a hall and easy raise up every bit high as you can onto your heels. Walk down the hall on your heels. When you reach the other side come down onto your pess and stand usually. Rest. Repeat 5 times.4. i »? Tandem Backward WalkTravel to one terminal of a hall and topographic point one pes behind the other pes so that the heel of one pes touches the toes of the other pes. Walk down the hall in a backward tandem walk. It is of import that with each measure the toes on one pes touch the heel of the other. If you make a error, merely topographic point one pes behind the other and go on down the hall. When you reach the other side, stand usually. Rest. Repeat 5 times.i »?3.11 Measurement ToolBERG BALANCE SCALEThe Berg Balance Scale ( BBS ) was developed to mensurate balance among people with damage in balance map by measuring the public presentation of functional undertakings. It is a valid instrument used for rating of the effectivity of intercessions and for quantitative descriptions of map in clinical pattern and research. The BBS has been evaluated in several dependability surveies. 14 points scale designed to mensurate balance of the grownup in a clinical scene.4. DATA ANALYSIS AND INTERPREATIONThe information collected was subjected to partner off ‘t ‘ trial separately for group A and group B utilizing expressions.Formula 1vitamin D = ? d/n Where, vitamin D = difference between pre trial and station trial values vitamin D = is the average value of vitamin D n = is the figure of topicsFormula 2: ( d-d ) 2 ( n -1 ) Standard divergence SD =Formula 3:Standard Error ( S.E ) = SD N ‘t ‘ calculated value = vitamin D S.EFormula 4:‘t ‘ cal = vitamin D S.E Where, t cal is the ‘t ‘ calculated value dI†¦ = mean of divergence n = entire figure of topics s = criterion divergence d? = amount of squared divergence4. Independent ‘t ‘ trialWhere S == Mean of Control group = Mean of Experimental group n1 = Number of Subjects in Control group n2 = Number of Subjects in Experimental group S = Standard Deviation Datas were collected from 30 patients analysed utilizing paired ‘t ‘ trial and Independent ‘t ‘ trial to happen out within group difference. All information was analysed utilizing SPSS version 10.0.Table 1DESCRIPTIVE DATA OF EXPERIMENTAL GROUPS.NoAgeYearSexual activityBerg Balance ScalePre-testPost trial1 48 Meter 37 47 2 50 Meter 38 45 3 46 F 36 46 4 45 F 36 45 5 49 Meter 38 47 6 48 F 35 46 7 49 Meter 37 48 8 50 Meter 37 47 9 48 F 39 48 10 48 Meter 38 47 11 47 Meter 36 46 12 50 Meter 35 46 13 49 F 38 48 14 46 Meter 35 46 15 49 Meter 39 47TABLE-11DESCRIPTIVE DATA OF CONTROL GROUPS.NoAgeYearSexual activityBerg Balance ScalePre-testPost trial1 47 Meter 38 41 2 46 Meter 38 42 3 46 Meter 36 41 4 47 F 37 37 5 48 Meter 35 37 6 49 Meter 39 42 7 48 F 39 42 8 48 F 38 40 9 50 Meter 36 39 10 49 Meter 37 40 11 46 Meter 38 41 12 45 F 37 40 13 47 Meter 36 39 14 47 F 39 42 15 49 F 37 41TABLE – II1DEMOGRAPHIC PRESENTATION OF SEXContentControlEXPERIMENTALMale 9 10 Female 6 5 Entire 15 15GRAPH- ISexual activity WISE DISTRIBUTION IN CONTROL GROUP AND EXPERIMENTAL GROUPThe above saloon graph shows, in control group 9 males and 6 females were selected ; and in experimental group 10 males and 5 females were selected.Table FourPRE TEST MEAN AND STD. DEVIATION OF BBS CONTROL AND EXPERIMENTAL GROUPGroup N ( No. of Subjects ) Mean STD. Deviation Control 15 37.33 1.234 EXPERIMENTAL 15 36.93 1.387Table VoltPOST TEST MEAN AND STD. DEVIATION OF BBS IN CONTROL AND EXPERIMENTAL GROUPGroup N ( No. of Subjects ) Mean STD. Deviation Control 15 40.27 1.67 EXPERIMENTAL 15 46.66 1.051GRAPH-IIMEAN DIFFERENCE OF BBS IN CONTROL AND EXPERIMENTAL GROUPInterpretation OF DATA:Statistical ANALYSIS OF BERG BALANCE SCALE IN CONTROL GROUP USING PAIRED ‘t ‘ TrialTable — VIGROUP CONTROL Mean South dakota T DF Sig t value Bulletin board system PRE 37.3 1.234 10.33 14 2.1447 Post 40.27 1.67Interpretation-Berg Balance Scale in control group-Above tabular array shows the mean of the pre trial informations for the control group as 37.3+_1.234 ( SD ) and post trial value as 40.27 ±1..67 ( SD ) . The deliberate T value is 10.33. It indicates that there is important difference between pretest and station values of Berg Balance graduated table in control group.GRAPH-IIIMEAN DIFFERENCE AND STANDARD DEVIATION OF BBS IN CONTROL GROUPInterpretation of informationsStatistical analysis of Berg Balance Scale in experimental group utilizing paired ‘t ‘ trialTABLE – SevenGroupMeanS.D‘t ‘dfExperimental Pre trial 36.67 1.54 27.04 14 Post trial 46.13 1.45 Interpretation – Berg balance graduated table Above tabular array shows the mean of pre trial informations for the experimental group as 36.67 ± 1.54 ( SD ) and post trial value as 46.13 ±1.45 ( S.D ) the deliberate ‘t ‘ value is 27.04 which is greater than that of table value. It indicates that there is important difference between pre trial and station trial values of Berg balance graduated table in experimental group.i »?GRAPH- IVMEAN DIFFERENCE AND STANDARD DEVIATION OF BBS IN EXPERIMENTAL GROUPSTASTICAL ANALYSIS OF BERG BALANCE SCALE OF PRE TEST VALUE USING INDEPENDENT T TrialTable EightEXPERIMENTAL AND CONTROL GROUP PRE TEST VALUE Mean South dakota T DF Bulletin board system EXP 36.93 1.39 1.83 28 CTRL 37.33 1.23INTERPRETATION-BERG BALANCE SCALECONTROL AND EXPERIMENTAL GROUP PRETEST VALUEAbove TABLE shows the mean of pre trial informations for experimental group as 36.933  ±1.39 ( SD ) the deliberate T value is 1.8310 and command group mean 37.33 ±1.3810 and calculated T value is 1.8310 for both experimental and control group. It indicates that there is no important difference between experimental and control group.GRAPH-VMEAN DIFFERENCE AND STANDARD DEVIATION OF BBS IN EXPERIMENTAL AND CONTROL GROUP USING INDEPENDENT‘T ‘ TrialSTASTICAL ANALYSIS OF BERG BALANCE SCALEPOST TEST VALUE USING INDEPENDENT T TrialTABLE – NineEXPERIMENTAL AND CONTROL GROUP POST TEST VALUE Mean South dakota T df Bulletin board system EXP 46.6 1.0521 12.6626 28 CTRL 40.27 1.6701INTERPRETATION- BERG BALANCE SCALECONTROL AND EXPERIMENTAL GROUP POST TEST VALUEAbove tabular array shows the mean of station trial informations for experimental group as 46.6  ±1.058387 ( SD ) the deliberate T value is 12.6626 and command group mean 40.27 ±1.6701 and calculated T value is 12.6626 for both experimental and control group. It indicates that there is a important difference in experimental group value than control groupGRAPH-VIMEAN DIFFERENCE AND STANDARD DEVIATION OF BBS IN POST TEST VALUES OF EXPERIMENTAL AND CONTROL GROUP USING INDEPENDENT ‘T ‘ Trial5. ResultEffectiveness of Control Group ( Medical intervention ) While comparing the pre-test and station trial values of control group utilizing Paired ‘t ‘ trial, the deliberate T value is 10.33 whereas the tabular array value is 2.145, it states that there is important difference between the pre-test and post-test values of control group. When comparing the average values of both, the station trial mean value is 1.67 which are greater than the pre trial mean value 1.234. Hence it confirms that there is a important betterment group. Effectiveness of Experimental Group ( Balance exercising with medical intervention ) While comparing the pre-test and station trial values of experimental group utilizing Paired't ‘ trial, the deliberate value is 31.8590646 whereas the tabular array value is 2.145. Since the deliberate value is more than the critical value, it states that there is important difference between the pre-test and post-test values of experimental group. When comparing the average values of both, the post-test mean value 46.6 which is greater than the pre-test mean value 36.933. Hence it confirms that there is a important betterment in post-test experimental group than pre trial experimental group.6. DiscussionDiabetess Mellitus is a Chronic status which encroaches about all the systems in the organic structure. Diabetic neuropathy is a complication of long standing diabetes, which affects nervousnesss of the organic structure. Diabetic neuropathy can impact all the tissues and the variety meats of the organic structure. Approximately about 60-70 % of the people with diabetes suffer from neuropathy and the oncoming can be at any clip in life. The incidence of neuropathy in diabetic patients increases with the period of diabetes. This survey was an experimental attack, which studied the effectivity of balance exercising in diabetic neuropathy patients. The result was measured utilizing Berg Balance Scale. It has been shown to a valid and dependable tool for the measuring of balance by measuring the public presentation of functional undertakings. The control group was given medical intervention and the patient besides given balance exercising in experimental group. Harmonizing to Shahin Goharpey, diabetic neuropathy consequences in functional instability which cause these patients to danger of falling during activities of day-to-day life and becomes more terrible as the badness of neuropathy aggravates. Balance exercising improves clinical steps of balance in patients with diabetic neuropathy. Loss of force per unit area sensitiveness was independently associated with the hazard of falling more than one time a twelvemonth and histories for 3- 6 % of relationship between diabetes and falling. Based on above survey, the present survey concluded that balance preparation to be an effectual agencies of cut downing frequence of autumn in patients with diabetic neuropathy.MechanismThe mechanism by which balance preparation affect the balance of diabetic neuropathy is due to, 1. During exercise whole organic structure O ingestion additions in the musculuss. 2. Addition in the concentration of Na+ / K+ adenosine triphosphatase ( ATPase ) pumps. 3. Exercise works to cut down insulin opposition which lowers blood sugar degrees. So heavy insulin opposition will set less strain on the organic structure to do insulin. 4. Exercise is helpful in keeping strength, mobility, map and besides provides stableness7. DecisionThe survey concludes that balance exercising seemed to be good in bettering balance and thereby cut downing the frequence of autumn in patients with diabetic neuropathy.LIMITATIONS AND SUGGESTIONSRestrictionStudy was conducted for a short period of clip. The survey assessed merely short term advancement of the patients. Since survey clip was short merely limited sample since could be considered for the survey.SuggestionTo set up the efficaciousness of the intervention a big sample size survey is required. To do the consequence more valid a long term survey may be carried out. The same survey can be done by modifying the exercising by increasing the complexness. The same survey can be done by increasing the exercising by its repeats. The same survey can be carried out in males and females individually.

Media Fast Assignment Essay Example | Topics and Well Written Essays - 750 words

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Consumer behaviour - Essay Example The essay below discusses the role of marketing in enhancing consumer motivation through application of consumer behaviour models. Marketing links the societal product requirements to the economic responsive strategies. Marketing can be viewed as an organisational function that creates, delivers and communicates value to consumers while managing customer relationships in strategies that are beneficial to the organisation. Most marketing strategies are geared towards understanding the consumer behaviour and providing superior customer value. Consumer behaviour is defined as the buying culture of consumers. Consumer behaviour is affected both intrinsic and extrinsic factors such as perception, the self, motivation, learning and memory, attitudes, group influence and culture. According to Solomon et al (2006: 6), consumer behaviour involves focus on the processes involved when individuals choose, buy, use and dispose products, or services to satisfy their needs or desires. Marketing is a chain of various market components that are interconnected. The components supplements and overlap with each other. Effective marketing entails taking into account the consumer opinion and behaviour that enables manufacturing of goods that suits their needs. Marketers should be able to discern what prompts a consumer to act and what stops them from purchasing products. The aim of studying consumer behaviour is to understand the buyer and make a customer out of them. The study focuses on the processes used to choose, secure, apply and dispose products, experiences, services and ideas in a bid to satisfy consumer needs. The problem remains pertinent even with the modern efforts geared towards improving the motivating aspect of marketing strategies. The buyer is a highly complex entity in the discussions involving consumer behaviour and motivation; their needs are innumerable. Some of the needs are latent, manifest or highly dominant. The marketer should understand that consumers hav e their own ideas on the mechanisms applied in realising needs and desires. Understanding the need-structure and priorities of the buyer will require the marketer to develop a market relationship with the consumer. Consumer behaviour is applied in the formulation of the marketing strategy, public regulations and social marketing. Focus on consumer behaviour leads to the establishment of improved marketing strategies aimed at improving the worth of marketing campaigns and attracting new consumers (Biernat and Sesko, 2012: 138-143). Marketing managers should take into account the psychological aspects of the consumers in identifying the most perfect time for conducting marketing operations in relation to their perceptions on time. Few consumers accept products when newly introduced in the market but they later embrace their use as they penetrate deeper into the markets. This implies that organisations should be well financed to ensure that their products stay afloat when newly introdu ced in the markets. Focus on few numbers of consumers enables them to understand consumer behaviour which they can harness in influencing high numbers of consumers. Marketing strategies such as social marketing does not only aim at promoting products but also enables the companies become acquainted with consumer behavioural peculiarities and apply them in production. Motivation compels individuals to action. It can be defined as the stimulation of any desire or emotion that occurs in response to a consumer’

Relationship between Entrepreneurship, Innovation and Economic Essay - 2

Relationship between Entrepreneurship, Innovation and Economic Development - Essay Example Such an analytical approach has furnished ample insight into the interrelationship existing between knowledge, innovation and entrepreneurship. However, it goes without saying that there is a lacuna as to the understanding of the comprehensive relationship between entrepreneurship, innovation and economic growth. The understanding of the relationships between micro economic sources of growth and the consequent macroeconomic outcomes is still too nascent as to the establishment of the relationships between varied interacting forces impacting the economic growth. Hence, in an academic perspective it will be really enlightening to analyze the recent advancements into the understanding of the varied forces influencing the creation of knowledge, the promulgation and diffusion of this knowledge aided by apt innovation and the role played by entrepreneurship in the overall growth process. For its goes without saying that the primary process of knowledge creation has to be continually and co mmensurately supported by forces originating from innovation and entrepreneurship, which give way to mechanisms that help in the conversion of this knowledge to societal and commercial needs. It is amply relevant as the developing countries of today could learn a lot from the course followed by the developed countries in their quest for economic growth. It will also immensely help the developed countries in the sense that they are faced with the challenging responsibility of devising growth policies in a futuristic context. Thus, it is emphatically valid to attempt an understanding into the relationship existing between entrepreneurship, innovation and economic growth. Entrepreneurship and Economic Development The very fact that entrepreneurship is closely tied to economic growth is amply corroborated by the commonsensical observation and economic acumen in the sense that the crux of any innovative entrepreneurial endeavour is to convert ideas and knowledge into commercially valid e conomic opportunities. Entrepreneurship is the bedrock on which rest the possibilities for innovation, change and growth. In a world economy that is getting globalized at a fast pace, entrepreneurship is a sources of competitiveness in the sense that it gives way to knowledge and flexibility. With the ensuing shift in the industrial frameworks and structures vying for an augmented decentralization and minimal concentration, the entrepreneurial vigour operating at all the levels in an economy is indeed a source of viable competitiveness. In that context if one takes into consideration the accompanying technological developments and changes and a resultant augmenting global competition and economic liberalization, the very assumption that promoting entrepreneurship in a way leads to the promotion of the economic growth appears more valid today than it did in the past. The available economic, social and psychological knowledge do points towards the fact that entrepreneurship is a proce ss that tends to be dynamic in its scope and ramifications. Though some experts may tend to think of entrepreneurship as a mechanical economic factor, yet, in reality it is far from being so (Pirich 2001, p. 14). Entrepreneurship has as much to do with change as with the choices related to a change era or process. In that context, the existing definitions of entrepreneurship delve on the functional aspects of entrepreneurship that may be allocation of the scarce resources, coordination, making decisions, innovation, capital augmentation and uncertainty management. Entrepreneurship unleashes the dormant growth

Business Assignmet Assignment Example | Topics and Well Written Essays - 4000 words - 1

Business Assignmet - Assignment Example There are 60 retail shops which the company uses to sell its shops and other accessories which it offers to its customers, these accessories include leather handbags, umbrellas, key fobs and other leather goods. Besides this, Cuero Ltd operates a distribution centre (Balcombe) not only helps them to distribute their own products but it also helps in distributing other associated products of its competitors, this gives Cuero Ltd a strong and dedicated distribution channel. Along with this distribution centre, the company runs a mail order business that helps in the promotion and marketing of the shoes and accessories produced and sold by the company. The performance of Cuero Ltd is to be appraised and evaluated on the basis of the 4 major organisational performance areas of analysis. These four major areas include; HR Performance issues; Financial Performance issues; Marketing and Supply Management issues. All of these areas of analysis are evaluated in separate individual reports to ascertain whether there are any issues/problems in that functioning area and how can that issue be resolved. This report analyses the performance of the people employed by Cuero Ltd. Besides the people directly by the company, other personnel whose activities may affect the business of Cuero Ltd is also considered. The Human Resource performance is appraised using the Critical incident method where the performance of the staff is appraised after assessing the positive and negative areas of their work. After the performance is analyzed, suitable recommendation as to the improvement of this function are also stated. Human resource is defined as "The people that staff and operate an organization"; as contrasted with the financial and material resources of an organization. Human Resources is also the organizational function that deals with the people and issues related to people such as compensation,

Law of Evidence Essay Example | Topics and Well Written Essays - 1500 words - 3

Law of Evidence - Essay Example This is the case with Carrie, because she has admitted under cross examination that she had made one prior false complaint of rape against another man. Therefore, in the interest of preserving fairness and equity to the defendant in the case, the Judge may have to issue a warning to the jury to exercise caution. Moreover, the content of his warning should also take into account the fact that she has made a prior false complaint. Therefore, the judge may warn the jury to exercise caution and may suggest to the jury that they look for supporting evidence before arriving at a decision basely solely on Carrie’s evidence. (b) If Carrie had indeed been raped, she would have mentioned it to her friend Eva whom she saw first after the incident, but her response when Eve asked if she was all right was â€Å"sure, why not?† This further substantiates the grounds that Carrie is an unreliable witness The prosecution is likely to argue against the issue of a Manjukola warning. They are likely to state that the entire question of corroboration warnings which purportedly allowed protection for defendants was done away with by the Criminal Justice and Public Order Act of 1994. The reason for this was the complexity they brought into judicial proceedings and their tendency to confuse judges. Therefore they are likely to argue that Carrie’s interests will be compromised and the jury will be unnecessarily prejudiced through the issue of a Manjukola warning which is not necessary. 2. The two major issues that arise with this scenario are (a) Stefan’s silence in Court especially in connection with his alibi which could establish innocence and (b) the need for protection of the young witness Ingrid who has been threatened. Stefan will be treated as a competent witness for himself but not as a compellable witness. Therefore, he will be

Persuasive speech , recycling or Presentation Example | Topics and Well Written Essays - 1000 words

Persuasive , recycling - Speech or Presentation Example We take these as simple daily acts of negligence but failing to throw that piece of paper, plastic, glass or metal in the right trash bin for recycling is slowly killing this beautiful earth we call home. Today, I am going to highlight the problem we face when we fail to recycle and contribute to build up of trash on Earth, the benefits of recycling and the steps we can take as individuals and communities to help. Effects of Trash Build-up and Benefits of Recycling Recycling is one of those things we all know we need to do, it is in our to-do list, but we fail to do it as effectively as we have planned, or in some of us, we completely disregard it. However, there are various reasons why we should always remember to recycle that piece of paper or plastic. In case an individual is not been very diligent in making an effort to throw the empty can of soda into the trash, here are the reasons why everybody should begin recycling. First of all, recycling fundamentally reduces global warmin g. Our mother Earth is unfortunately feeling the effects of global warming already and it is our duty as the inhabitants to take whatever initiative possible to cut down or totally eliminate the negative impacts that come with this sad phenomenon. The industrial production of certain materials that we use in our daily lives can release significant amounts of carbon dioxide into the atmosphere. For example, the production of new aluminum, the material used to make the cans for sodas, leads to the production of 92% more carbon dioxide that recycling old aluminum cans (Hieronymi, Ramzy and Eric 94). Now we all know from our chemistry lessons that carbon dioxide is one of the greenhouse gases responsible for global warming and additional release to the atmosphere is a resultant increase in global warming. Recycling also makes us more energy efficient as more energy is usually needed to create something from the raw materials than to recycle it. For instance, producing paper from trees c onsumes sixty four percent more energy than recycling it while burning plastic uses double the energy that would have been consumed if recycled. The energy saved when materials are reprocessed can be applied in other useful areas, for instance, if only one pound of steel is recycled, the energy can be used to power a 60-watt bulb for a whole day. Is it not just intriguing how much we can save by remembering to throw that litter in the right trash bin? Recycling waste also keeps our landfills from overflowing as we are soon running out of space to use for dumping our litter. I believe that none of us here today would wish to see his landfill of trash backyard his balcony. Moreover, studies have shown that 60-70% of garbage in landfills can be recycled which implies that if we became more diligent in recycling, we would be getting rid of 60-70% of the garbage lying in the landfills (Miller and Spoolman 555). We should also not forget that these landfills release toxic gases that are n ot only harmful to us human beings, but also to the ecological life around them. The process also improves the quality of the earth’s groundwater as the garbage deposited in landfills is never treated but just buried. Therefore, any toxic chemicals that could have present in the garbage are allowed to seep into the ground water that are used in other areas as a source of water for daily household usage. Furthermore, runoff rainwater from these

Comparitive Argumentive essay on the primary text of the Canadian

Comparitive Argumentive on the primary text of the Canadian Dream - Essay Example There is a great Canadian dream that is related to the aspect of immigration. Both of these texts are involved with this dream though in different ways. It is this aspect that brings about the main difference between the texts. In both texts, there are immigrants who gain entry into the Canadian land. Each of them is astonished and overwhelmed by what they see and encounter. In this sense, they are both driven by the Canadian dream to afford the lives of the inhabitants hence make their future in the new land better. They also have similar experiences. However, they handle these experiences in different ways hence accomplishing the Canadian dream in completely varied ways. Thus, while others are able to realize this dream fully, there are others who are not able to do so based on the different ways that they work towards it and against the oppression that they face as they try to adapt into the new ways. The Canadian dream was created for those who were moving from Canada to other new places. It made use of the term ethnic, which was used to refer to all those individuals who have become immigrants but are not members of the founding cultures in Canada. They include those who are not the catholic French or the protestant Anglo-Celtic. In addition, the term ethic was also used to involve all those aboriginal inhabitants of Canada, the native Indians as well as the Inuits, who have always kept their distance and alienated themselves from the Canadian society. The main aim was to bring about personal development and prosperity for the individuals. It was clear that any immigrant from Canada to other areas would feel pressured to adapt to most of the new ways that they experienced in the new areas. However, despite their ability to learn new ways, it was advisable that they do not get fully assimilated in the new ways but also try as much as possible to hold on to their previous ways an d not forget

Live Scan Term Paper Example | Topics and Well Written Essays - 1000 words

Live Scan - Term Paper Example These services are generally required by the police department to keep records and track criminals. This service has also been used in airports throughout to quickly get the details of passengers and immigrants. This service is however also utilized by universities and other departments for checking employee records before employments. This information to these departments is usually available through Department of Justice (DOJ). Live scan uses the advanced digital photography methods to capture the images of fingerprints. For this the person needs to press his or her fingers on a screen or scanner. The image is scanned, captured and stored in electronic form on computer databases. Thus the whole process is somewhat similar to the scanning of documents in a scanner and storing the captured images on the computer in the form of a file. Scanning fingerprints however needs some special type of scanners. As these scans are stored in computers, it becomes easy to analyze the fingerprints without much hassle. These can be then shared with any departments around the world as it is easy to send the files through computer networks. "Live scan instruments must be able to collect fingerprints from a wide cross section of people-including those with very fine, worn, scarred or cracked fingerprint ridges and varying degrees of skin moisture content." (Cross Match Technologies, 2007). Most of the instruments provide scans for well ridged fingerprints giving very low quality scans for people with dry skin and other problems. This makes it very difficult to identify such fingerprints. Younger people are well suited for live scan fingerprints as they generally have healthy skin with no such problems to hinder the fingerprinting process. For people with too dry or too moist skin there is a problem in capturing the scans. For this purpose silicone membranes have been developed which are in the form of transparent sheets. These sheets are kept on the screen of the instrument and fingers are pressed against the sheet. This membrane helps in enhancing ridges of the fingers thereby providing well defined scans for people wi th varied moisture content in their skin. There is another problem faced by these instruments and that is of very high volume scans due to which the fingerprints often get mixed up. This problem is also addressed by these silicone membranes. The membranes last for very long and when they need replacement it is very easy to peel them off and place a new one without taking any time. Other advantages include the protection of the capturing screen of the instrument as the membrane is placed on it. Another it is very easy to clean the membrane once it gets dirty. There is no need of application of any liquid or special cloth to clean it. It is done simply by placing a tape on it so that the dirt or any oils, etc. stick to it and get away making the membrane ready to be used again. Although most of the instruments use optical scanning technique in live scan systems, there have been recent developments in this field prompting the use of ultrasonic technique for the same. The fingerprints using ultrasonic systems have been seen to be of better quality than the optical ones. The ultrasonic technique again addresses the same problems of varied moisture c

Friendship Essay Example for Free

Friendship Essay In our society, no one can live without friends. It would be a lonely and bored life without friend. Life becomes more beautiful when we have friends. But what is friendship? Different life experiences make up different meanings of friendship for different people. I believe a friend can share our happiness and sorrow and is always with us to solve our problems and make us happy. Friendship is about action, not a state of mind. A friend can support us while we are on the right path and can have the courage to stand in front of you when you are in the wrong way. Our friendships change while we grow up, especially for teenagers. The teenage years are a time of physical, emotional, and social growth and change. As teenagers, we all want to make friends. When we are younger, our parents control us. We do not have time to make our own friends. As we grow up, our parents give us more free time. We start to make our own friends and hang out with them. I have many friends. One of them is Joana Rose Nacional, Joana for short. She was born on October 27, 1999. Her parents are Evelyn and Godofredo Nacional. She is a fine girl of fair complexion with straight brown hair flowing on her head. She has two beautiful eyes and a well set nose. Her weight which is 50 kilograms is really more than mine. She’s more healthy than I am, and she loves food. In fact, she likes â€Å"sinigang na baboy†, her mother’s lasagna, pastel de lengua, lengua estofado, ice cream and chocolates. Her favorite colors are green, blue, and red. Her favorite books are Harry Potter, Tuesdays with Morrie, and others. Her favorite kind of clothes are those with a touch of Korean and American fashion. Her favorite symbol is a star because, according to her, she wants to shine at the darkest part of other people’s life. Her favorite subjects are Grammar Composition and Mathematics. As a big KPOP fan, her favorite celebrities are those of Korean ethics. She descirbes herself as Religious. Her ambitions in life are to be a lawyer or a graduate in Engineering or Chemical Engineering. All she wishes for are to go to Korea ,meet her favorite KPOP artists and get to live with them, travel around the world, have a successful life, and most importantly, have a peaceful and happy life with her family. Most of us may make friends and are very careful of whom we choose. We choose friends as we grow up because we start to realize what true friends are. We have more experiences in life. We know what kind of friends we need. Friends never fade away, in fact, they grow better with time. Friendship comes so rarely, and without it, we are lost. Whatever happens, we should keep our friends close to our heart, tell them how they are important to us and not let them slip away. If they do, go out and get them back.

Slack Bus And Slack Generator

Slack Bus And Slack Generator The Table below shows input data of each busbar in the system used to solve the power flow and the simulation result according to instruction described in question 1. BUS Input Data [Simulation Result] BUS 1 pu P (load) 100 MW Q (load) 0 Mvar BUS 2 P (load) 200 MW Q (load) 100 Mvar CB of Generation Open BUS 3 1 pu P (Gen) 200 MW P (load) 100 MW Q (load) 50 Mvar AVR On AGC Off Slack bus and slack generator In power flow calculation, unique numerical solution cannot be calculated without reference voltage magnitude and angle due to unequal number of unknown variables and independent equations. The slack bus is the reference bus where its voltage is considered to be fixed voltage magnitude and angle (1à ¢Ã‹â€ Ã‚  0 °), so that the various voltage angle difference among the buses can be calculated respect. In addition, the slack generator supplies as much real power and reactive power as needed for balancing the power flow considering power generation, load demand and losses in the system while keep the voltage constant as 1à ¢Ã‹â€ Ã‚  0 °. In real power system, when relatively weak system is linked to the larger system via a single bus, this bus can represent the large system with an equivalent generator keeping the voltage constant and generating any necessary power like slack bus. [1] Bus type (PQ bus or PV bus) BUS Bus type Comments BUS 2 PQ Bus Generator is disconnected to Bus 2 BUS 3 PV Bus Generator is connected to Bus 3 and the magnitude of voltage of generator keep constant by using AVR In general, each bus in the power system can be categorized into three bus types such as Slack Bus, Load (PQ) Bus, and Voltage Controlled (PV) Bus. The definition and difference between PQ Bus and PV Bus are described as follows; [2] PV Bus (Generator Bus or Voltage Controlled Bus): It is a bus at which the magnitude of the bus voltage is kept constant by the generator. Even though the bus has several generators and load, if any generators connected to the bus regulate the bus voltage with AVR, then this bus is referred to PV Bus. For PV bus, the magnitude of the bus voltage and real power supplied to the system are specified, and reactive power and angle of the bus voltage are accordingly determined. If a preset maximum and minimum reactive power limit is reached, the reactive output of the generator remains at the limited values, so the bus can be considered as PQ Bus instead of PV Bus. [2] PQ Bus (Load Bus): It is a bus at which the voltage is changed depending on total net real power and reactive power of loads and generators without voltage regulator. Therefore, in the power simulation and calculation, the real power and reactive power of the loads are specified as input data and accordingly the voltage (magnitude and angle) is calculated based on the above input. The following table specifies input and output of each bus type in the power system simulation and calculation. Bus Type P Q (Magnitude) ÃŽÂ ´ (Angle) PQ Bus Input Input Output Output PV Bus Input Output Input Output Slack Bus Output Output Input Input System Balance Total Generation Load Demand BUS Real Power (MW) Imaginary Power (Mvar) Generation Load Generation Load BUS 1 204.093 100 56.240 0 BUS 2 0 200 0 100 BUS 3 200 100 107.404 50 Total 404.093 400 163.644 150 Difference Pgen Pdemand = 4.093 Qgen Qstored in load = 13.644 Reason: Real power loss due to resistance of transmission line and imaginary power storage due to reactance of transmission line are the reasons for the difference between power generation and load demand in the system. P (Losses) Q (Storage) over the transmission line BUS Real Power (MW) Imaginary Power (Mvar) Sending Receiving Losses Sending Receiving Stored BUS 1 BUS 2 102.714 100.650 2.064 56.653 49.773 6.88 BUS 1 BUS 3 1.379 1.378 0.001 0.4141) 0.4131) 0.001 BUS 3 BUS 2 101.378 99.350 2.028 56.990 50.227 6.763 Total Plosses = 4.093 Qstored in load = 13.644 1) Imaginary power flows from Bus 3 to Bus 1. The summation of real power losses and imaginary power storage over the transmission line are exactly same with total difference between generation and load. Therefore, it is verified that the difference is shown over the transmission line. Kirchoff balance as each bus [4] Bus1 ÃŽÂ £ P1 = + Pgen1 Pload1 P12 P13 = 204.093 100 102.714 1.379 = 0 ÃŽÂ £ Q1 = + Qgen1 Qload1 Q12 Q13 = 56.24 0 56.653 + 0.413 = 0 Bus2 ÃŽÂ £ P2 = + Pgen2 Pload2 P21 P23 = 0 200 + 100.65 + 99.35 = 0 ÃŽÂ £ Q2 = + Qgen2 Qload2 Q21 Q23 = 0 100 + 49.773 + 50.227 = 0 BUS3 ÃŽÂ £ P3 = + Pgen3 Pload3 P31 P32 = 200 100 + 1.378 101.378 = 0 ÃŽÂ £ Q3 = + Qgen3 Qload3 Q31 Q32 = 107.404 50 0.414 56.99 = 0 According to the calculation above, as summation of incoming outgoing real power and imaginary power at each bus become zero, it is verified that each busbar obeys a Kirchoff balance. In addition, the total power system is completely balanced, because total generation power (real imaginary) are equal to summation of total load demand and real power loss stored imaginary power over the transmission (i.e. Pgen Pdemand = Plosses, Qgen Qstored in load = Q stored in system) as shown above. Voltage Angle and Angle Difference As a result of the Powerworld, the voltage angle and angle difference are shown in the table below. BUS Voltage Angle Voltage Angle Difference BUS1 ÃŽÂ ´1 = 0.00 ° BUS1- BUS2 ÃŽÂ ´1 ÃŽÂ ´2 = 0.00 ° (-2.5662 °) = 2.5662 ° BUS2 ÃŽÂ ´2 = -2.5662 ° BUS2- BUS3 ÃŽÂ ´2 ÃŽÂ ´3 = -2.5662 ° (-0.043 °) = -2.5232 ° BUS3 ÃŽÂ ´3 = -0.043 ° BUS3- BUS1 ÃŽÂ ´3 ÃŽÂ ´1 = -0.043 ° 0.00 ° = -0.043 ° Power System Analysis -1 The table below summarizes generation and voltage angle variation at each bus as generation at Bus 3 varies from 0 MW to 450 MW by 50MW. Simulation Results and Observation P3 = 0 MW P3 = 50 MW P3 = 100 MW P3 = 150 MW P3 = 250 MW P3 = 300 MW P3 = 350 MW P3 = 400 MW P3 = 450 MW Reactive Power Generation at Bus 3: It is found that reactive power generation Q3(gen) decrease while real power generation P3(gen) increase because Bus 3 as a PV Bus regulates the constant bus voltage magnitude by controlling excitation of the generation through the AVR. Power Generation at Bus 1: It is found that P1(gen) decreases and Q1(gen) increases simultaneously, while P3(gen) increases and Q3(gen) decrease. As the total load demand in the system keeps constant (i.e. Ptotal(load) = 400 MW, Qtotal(load) = 150Mvar), any necessary real power and reactive power for the system balance need to be supplied by generator (slack generator) at Bus 1. Therefore, power generation P1(gen) and Q1(gen) at Bus 1 change reversely compared to power generation change at Bus 3. Voltage Angle Difference: In general, real power flow is influenced by voltage angle difference between sending bus and receiving bus according to PR =. Therefore, it is observed that as real power generation P3(gen) increases real power flow from Bus 3 to Bus2 increase, accordingly voltage angle difference (ÃŽÂ ´3 ÃŽÂ ´2) between Bus 3 and Bus 2 increases. However, decrease in real power from Bus 1 to Bus 2 due to increase of P3(gen) result in decrease of voltage angle difference (ÃŽÂ ´1 ÃŽÂ ´2). In addition, Real power between Bus 1 and Bus 3 flows from Bus 1 to Bus 3 until P3(gen) reach to 200 MW and as P3(gen) increase more than 200 MW the real power flows from Bus 3 to Bus 1. So, it is also observed that voltage angle difference (ÃŽÂ ´3 ÃŽÂ ´1) is negative angle when P3(gen) is less than 200MW and the difference increase while P3(gen) increase. Power System Analysis -2 The table below summarizes the variation of power generation and voltage angle difference at each bus when the load demand at Bus 3 varies by 50MW and 25Mvar. Simulation Results and Observation P2 = 0 MW Q2 = 0 MW P2 = 50 MW Q2 = 25 MW P2 = 100 MW Q2 = 50 MW P2 = 150 MW Q2 = 75 MW P2 = 250 MW Q2 = 125 MW P2 = 300 MW Q2 = 150 MW P2 = 350 MW Q2 = 175 MW P2 = 400 MW Q2 = 200 MW P2 = 450 MW Q2 = 225 MW Power Generation at Bus 1 and Bus 3: It is observed that as the total load demand in the system increases due to increase of load demand P2(load) Q2(load) at Bus 2, any necessary real power for the system balance is supplied by generator (slack generator) at Bus 1 considering constant P3(gen), so P1(gen) increases. In addition, any necessary reactive power for the system balance is supplied from Bus 1 as well as Bus 3, so both Q1(gen) and Q3(gen) increase. Voltage Angle Difference: It is found that real power flow increase both from Bus 1 to Bus 2 and from Bus 3 to Bus 2 due to increase of load demand at Bus2. Accordingly, both voltage angle difference ÃŽÂ ´1 ÃŽÂ ´2 and ÃŽÂ ´3 ÃŽÂ ´2 increase when the power flow P12 and P32 increase. In addition, when P2(load) is less than 200 MW, P1gen is relatively low. Therefore real power between Bus 3 and Bus 1 flows from Bus 3 to Bus 1 at lower P2(load) (less than 200MW). On the other hand, while P2(load) increase more than 200 MW, the real power flow direction changes (Bus 1 to Bus 3) and the real power flow increases. Accordingly, the voltage angle difference ÃŽÂ ´1 ÃŽÂ ´3 change from negative to positive and increase. Voltage Magnitude at Bus 2: It is observed that magnitude of bus voltage at Bus2 drops due to increase of the load demand at Bus 2. Question 2 System Model Admittance Matrix In order to construct the admittance matrix of Powerworld B3 case, single phase equivalent circuit can be drawn as below; z = r + jx (r = 0, x = 0.05) z12 = z21= j0.05 pu, y12 = 1/ z12 = 1/j0.05 = -j20 pu = y12 z13 = z31= j0.05 pu, y13 = 1/ z13 = 1/j0.05 = -j20 pu = y31 z23 = z32= j0.05 pu, y23 = 1/ z23 = 1/j0.05 = -j20 pu = y32 Admittance matrix can be defined as follows; BUS = Diagonal elements Y(i,i) of the admittance matrix, called as the self-admittance [lecture slide] [6], are the summation of all admittance connected with BUS i. = y12 + y13 = -j20 j20 = -j40 pu = y21 + y23 = -j20 j20 = -j40 pu = y31 + y32 = -j20 j20 = -j40 pu Off diagonal elements Y(i,j) of the admittance matrix, called as the mutual admittance [lecture slide] [6], are negative admittance between BUS i and BUS j. = y12 = -(-j20) = j20 pu = y13 = -(-j20) = j20 pu = y21 = -(-j20) = j20 pu = y23 = -(-j20) = j20 pu = y31 = -(-j20) = j20 pu = y32 = -(-j20) = j20 pu Therefore, the final admittance matrix BUS is; BUS = = The following figure shows the BUS of the Powerworld B3 case and it is verified that the calculated admittance matrix is consistent with the result of the Powerworld. Power Flow Calculation Nodal equation with the admittance matrix can be used to calculate voltage at each bus if we know all the current (i.e. total generation power and load demand at each BUS) and finally the power flow can be calculated accordingly. , therefore, In this question, however, simulation results of the voltage at each bus from the Powerworld are used for the power flow calculation as follows; [Simulation result] Voltage at each Bus and Voltage Difference V1 = 1 à ¢Ã‹â€ Ã‚  0.00 ° pu (BUS1) V2 = 1 à ¢Ã‹â€ Ã‚  -0.48 ° pu (BUS2) V3 = 1 à ¢Ã‹â€ Ã‚  0.48 ° pu (BUS 3) Voltage difference between BUS 1 and BUS 2 V12 = V1 V2 = 1 à ¢Ã‹â€ Ã‚  0.00 ° 1 à ¢Ã‹â€ Ã‚  -0.48 ° = 3.5 x 10-5 + j 8.38 x 10-3 = 8.38 x 10-3 à ¢Ã‹â€ Ã‚  89.76 ° pu V21 = V2 V1 = V12 = 3.5 x 10-5 j 8.38 x 10-3 = 8.38 x 10-3 à ¢Ã‹â€ Ã‚  -90.24 ° pu Voltage difference between BUS 3 and BUS 2 V32 = V3 V2 = 1 à ¢Ã‹â€ Ã‚  0.48 ° 1 à ¢Ã‹â€ Ã‚  -0.48 ° = j 16.76 x 10-3 = 16.76 x 10-3 à ¢Ã‹â€ Ã‚  90 ° pu V23 = V2 V3 = V32 = j 16.76 x 10-3 = -16,76 x 10-3 à ¢Ã‹â€ Ã‚  -90 ° pu Voltage difference between BUS 3 and BUS 1 V31 = V3 V1 = 1 à ¢Ã‹â€ Ã‚  0.48 ° 1 à ¢Ã‹â€ Ã‚  0.00 ° = 3.5 x 10-5 + j 8.38 x 10-3 = 8.38 x 10-3 à ¢Ã‹â€ Ã‚  90.24 ° pu V13 = V1 V3 = V31 = 3.5 x 10-5 j 8.38 x 10-3 = 8.38 x 10-3 à ¢Ã‹â€ Ã‚  -89.76 ° pu Line Current Current flow from BUS i and BUS j can be calculated by using voltage difference and interconnected admittance of the line between buses. [ Iij = yij * (Vi Vj) ] Line current between BUS 1 and BUS 2 I12 = y12 x (V1 V2) = -j20 x 8.38 x 10-3 à ¢Ã‹â€ Ã‚  89.76 ° = 167.6 x 10-3 à ¢Ã‹â€ Ã‚  -0.24 ° pu (BUS 1 à ¢Ã¢â‚¬  Ã¢â‚¬â„¢ BUS 2) I21 = y21 x (V2 V1) = -j20 x 8.38 x 10-3 à ¢Ã‹â€ Ã‚  -90.24 ° = 167.6 x 10-3 à ¢Ã‹â€ Ã‚  -180.24 ° pu (BUS 2 à ¢Ã¢â‚¬  Ã¢â‚¬â„¢ BUS 1) Line current between BUS 3 and BUS 2 I32 = y32 x (V3 V2) = -j20 x 16.76 x 10-3 à ¢Ã‹â€ Ã‚  90 ° = 335.2 x 10-3 à ¢Ã‹â€ Ã‚  0.00 ° pu (BUS 3 à ¢Ã¢â‚¬  Ã¢â‚¬â„¢ BUS 2) I23 = y23 x (V2 V3) = -j20 x 16.76 x 10-3 à ¢Ã‹â€ Ã‚  -90 ° = 335.2 x 10-3 à ¢Ã‹â€ Ã‚  180 ° pu (BUS 2 à ¢Ã¢â‚¬  Ã¢â‚¬â„¢ BUS 3) Line current between BUS 3 and BUS 1 I31 = y31 x (V3 V1) = -j20 x 8.38 x 10-3 à ¢Ã‹â€ Ã‚  90.24 ° = 167.6 x 10-3 à ¢Ã‹â€ Ã‚  0.24 ° pu (BUS 3 à ¢Ã¢â‚¬  Ã¢â‚¬â„¢ BUS 1) I13 = y13 x (V1 V3) = -j20 x 8.38 x 10-3 à ¢Ã‹â€ Ã‚  -89.76 ° = 167.6 x 10-3 à ¢Ã‹â€ Ã‚  -179.76 ° pu (BUS 1 à ¢Ã¢â‚¬  Ã¢â‚¬â„¢ BUS 3) Apparent Power Flow Apparent flow from BUS i and BUS j can be calculated by voltage at the sending bus and line current. [ Sij = Vi * I*ij ] Apparent Power from BUS 1 to BUS 2 S12 = V1* I*12 = 1 à ¢Ã‹â€ Ã‚  0.00 ° x 167.6 x 10-3 à ¢Ã‹â€ Ã‚  0.24 ° = 167.6 x 10-3 à ¢Ã‹â€ Ã‚  0.24 ° = 0.1676 + j 7.02 x 10-4 pu Apparent Power from BUS 2 to BUS 1 S21=V2* I*21=1à ¢Ã‹â€ Ã‚  -0.48 ° x 167.6 x 10-3à ¢Ã‹â€ Ã‚  180.24 °=167.6 x 10-3à ¢Ã‹â€ Ã‚  179.76 ° = -0.1676 + j7.02 x 10-4 pu Apparent Power from BUS 3 to BUS 2 S32 = V3* I*32 = 1 à ¢Ã‹â€ Ã‚  0.48 ° x 335.2 x 10-3 à ¢Ã‹â€ Ã‚  0.00 ° = 335.2 x 10-3 à ¢Ã‹â€ Ã‚  0.48 ° = 0.3352 + j 2.81 x 10-3 pu Apparent Power from BUS 2 to BUS 3 S23=V2* I*23=1 à ¢Ã‹â€ Ã‚  -0.48 ° x 335.2 x 10-3 à ¢Ã‹â€ Ã‚  180 °= 335.2 x 10-3 à ¢Ã‹â€ Ã‚  179.76 ° = -0.3352 + j 2.81 x 10-3 pu Apparent Power from BUS 3 to BUS 1 S31 = V3* I*31 = 1à ¢Ã‹â€ Ã‚  0.48 ° x 167.6 x 10-3à ¢Ã‹â€ Ã‚  -0.24 ° = 167.6 x 10-3 à ¢Ã‹â€ Ã‚  0.24 ° = 0.1676 + j 7.02 x 10-4 pu Apparent Power from BUS 1 to BUS 3 S13=V1* I*13=1à ¢Ã‹â€ Ã‚  0.00 ° x 167.6 x 10-3à ¢Ã‹â€ Ã‚  179.76 °= 167.6 x 10-3à ¢Ã‹â€ Ã‚  179.76 ° = -0.1676 + j 7.02 x 10-4 pu Comparison with simulation results The unit of the above calculation results is pu value, so in order to compare the results with simulation results pu value of current and power flow need to be converted to actual values by using the following equation considering Sbase = 100MVA and Vline_base = 345kV. [3] Sactual = Sbase ÃÆ'- Spu = 100 MVA ÃÆ'- Spu Iactual = Ibase ÃÆ'- Ipu = ÃÆ'- Ipu = ÃÆ'- Ipu = 167.3479 A ÃÆ'- Ipu Calculation Result and Simulation Result Flow direction Value Calculation Result Simulation Result BUS 1 à ¢Ã¢â‚¬  Ã¢â‚¬â„¢ BUS 2 |S12| 0.1676 ÃÆ'- 100 = 16.76 MVA 16.67 MVA P12 16.76 MW 16.67 MW Q12 0.0702 Mvar 0.07 Mvar |I12| 0.1676 ÃÆ'- 167.3479 = 28.0475 A 27.89 A BUS 3 à ¢Ã¢â‚¬  Ã¢â‚¬â„¢ BUS 2 |S32| 0.3352 ÃÆ'- 100 = 33.52 MVA 33.33 MVA P32 33.52 MW 33.33 MW Q32 0.281 Mvar 0.28 Mvar |I32| 0.3352 ÃÆ'- 167.3479 = 56.0950 A 55.78 A BUS 3 à ¢Ã¢â‚¬  Ã¢â‚¬â„¢ BUS 1 |S31| 0.1676 ÃÆ'- 100 = 16.76 MVA 16.67 MVA P31 16.76 MW 16.67 MW Q31 0.0702 Mvar 0.07 Mvar |I31| 0.1676 ÃÆ'- 167.3479 = 28.0475 A 27.89 A BUS 2 à ¢Ã¢â‚¬  Ã¢â‚¬â„¢ BUS 1 |S21| 0.1676 ÃÆ'- 100 = 16.76 MVA 16.67 MVA P21 -16.76 MW -16.67 MW Q21 0.0702 Mvar 0.07 Mvar |I21| 0.1676 ÃÆ'- 167.3479 = 28.0475 A 27.89 A BUS 2 à ¢Ã¢â‚¬  Ã¢â‚¬â„¢ BUS 3 |S23| 0.3352 ÃÆ'- 100 = 33.52 MVA 33.33 MVA P23 -33.52 MW -33.33 MW Q23 0.281 Mvar 0.28 Mvar |I23| 0.3352 ÃÆ'- 167.3479 = 56.0950 A 55.78 A BUS 1 à ¢Ã¢â‚¬  Ã¢â‚¬â„¢ BUS 3 |S13| 0.1676 ÃÆ'- 100 = 16.76 MVA 16.67 MVA P13 -16.76 MW -16.67 MW Q13 0.0702 Mvar 0.07 Mvar |I13| 0.1676 ÃÆ'- 167.3479 = 28.0475 A 27.89 A It is found that calculation results of current flow and apparent power flows (i.e. 28.0475 A and 56.0950 A/ 33.52 MVA and 16.76MVA) are about 0.5 % higher than simulation result (i.e. 27.89 A and 55.78 A / 33.33 MVA and 16.67 MVA) which can be considered slightly different. Difference of the voltage angle at each bus between calculation (0.48 °) and simulation (0.4775 °) could be the reason for this minor difference. Question 3 Admittance Matrix and Nodal Equation Admittance between two buses y12 = y21 = -j8 pu y13 = y31 = -j4 pu y14 = y41 = -j2.5 pu y23 = y32 = -j4 pu y24 = y42 = -j5 pu y30 = -j0.8 pu (BUS3-Neutral BUS) y40 = -j0.8 pu (BUS4-Neutral BUS) Admittance Matrix Ybus (Admittance Matrix) = Diagonal elements Y(i,i) of the admittance matrix, called as the self-admittance [2] [4], are the summation of all admittance connected with BUS i. = y12 + y13 + y14 = -j8 -j4 j2.5 = -j14.5 = y21 + y23 + y24 = -j8 -j4 j5 = -j17 = y30 + y31 + y32 = -j08 -j4 j4 = -j8.8 = y40 + y41 + y42 = -j0.8 -j2.5 j5 = -j8.3 Off diagonal elements Y(i,j) of the admittance matrix, called as the mutual admittance [2] [4], are negative admittance between BUS i and BUS j. = y12 = -(-j8) = j8 pu = y13 = -(-j4) = j4 pu = y14 = -(-j2.5) = j2.5 pu = y21 = -(-j8) = j8 pu = y23 = -(-j4) = j4 pu = y24 = -(-j5) = j5 pu = y31 = -(-j4) = j4 pu = y32 = -(-j4) = j4 pu = y34 = 0 pu = y41 = -(-j2.5) = j2.5 pu = y42 = -(-j5) = j5 pu = y43 = 0 pu Therefore, admittance matrix Ybus is as follows; Ybus = = Power Flow Analysis Power flow ignoring transmission line capacitance Nodal Equation Current from the neutral bus to each bus are given and admittance matrix (Ybus) is calculated above. Therefore, final nodal equation is as follows; Ibus = Ybus * Vbus à ¢Ã¢â‚¬ ¡Ã¢â‚¬â„¢ Vbus = Y-1bus * Ibus = Ybus à ¢Ã¢â‚¬ ¡Ã¢â‚¬â„¢ = = Voltage Analysis Voltage at each bus can be derived from the equation (Vbus = Y-1bus * Ibus) and Matlab was used for calculate matrix division. (Source code is attached in Appendix-1) Vbus == V12 = 0.0034 + j 0.0031 pu V13 = -0.0277 j 0.0257 pu V14 = 0.0336 + j 0.0311 pu V21 = -0.0034 j 0.0031 pu V23 = -0.0311 j 0.0288 pu V24 = 0.0302 + j 0.0280 pu V31 = 0.0277 + j 0.0257 pu V32 = 0.0311 + j 0.0288 pu V41 = -0.0336 j 0.0311 pu V42 = -0.0302 j 0.0280 pu Current flow in the system Current flow from BUS i and BUS j can be calculated by using voltage difference and interconnected admittance of the line between buses. [Iij = yij * (Vi Vj) ] The calculation result from Matlab is as follows; I12 = 0.0249 j 0.0269 pu I13 = -0.1026 + j 0.1108 pu I14 = 0.0777 j 0.0840 pu I21 = -0.0249 + j 0.0269 pu I23 = -0.1151 + j 0.1243 pu I24 = 0.1399 j 0.1511 I31 = 0.1026 j 0.1108 pu I32 = 0.1151 j 0.1243 pu I34 = 0 pu I41 = -0.0777 + j 0.0840 pu I42 = -0.1399 + j 0.1511 pu I43 = 0 pu Power flow in the system Apparent flow from BUS i and BUS j can be calculated by voltage at the sending bus and line current. [ Sij (pu) = Vi * I*ij = Pij + jQij ] The calculation result from Matlab is as follows; S12 = 0.0311 + j 0.0175 pu S13 = -0.1283 j 0.0723 pu S14 = 0.0972 + j 0.0548 pu S21 = -0.0311 j 0.0174 pu S23 = -0.1438 j 0.0803 pu S24 = 0.1749 + j 0.0977 pu S31 = 0.1283 + j 0.0780 pu S32 = 0.1438 + j 0.0875 pu S34 = 0 pu S41 = -0.0972 j 0.0496 pu S42 = -0.1749 j 0.0892 pu S44 = 0 pu Admittance Matrix considering transmission line capacitance According to the instruction of the Question 3, power system model can be drawn by using à Ã¢â€š ¬ equivalent circuit of the lines with capacitive shunt admittance (yc) of 0.1 pu at each side as shown below. Admittance Matrix Contrary to equivalent model in Question 3-1, the current flow through the capacitor in the transmission line needs to be considered to find the admittance matrix. Therefore, considering the capacitors the current equation with Kirchhoffs current law at each bus is as follows; [2] [5] Bus 1: I1 = I12 + I13 + I14 + Ic12 + Ic13 + Ic14 I1 = y12(V1-V2) + y13(V1-V3) + y14(V1-V4) + yc12V1 + yc13V1 + yc14V1 Bus 2: I2 = I21 + I23 + I24 + Ic21 + Ic23 + Ic24 I2 = y21(V2-V1) + y23(V2-V3) + y24(V2-V4) + yc21V2 + yc23V2 + yc24V2 Bus 3: I3 = I30 + I31 + I32 + Ic31 + Ic32 I3 = y30V3 + y31(V3-V1) + y32(V3-V2) + yc31V3 + yc32V3 Bus 4: I4 = I40 + I41 + I42 + Ic41 + Ic42 I4 = y40V4 + y41(V4-V1) + y42(V4-V2) + yc41V4 + yc42V4 Equation above can be rearranged to separate and group individual products by voltage. Bus 1: I1 = (y12 + y13 + y14 + yc12 + yc13+ yc14)V1 y12V2 y13V3 y14V4 = Y11V1 + Y12V2 + Y13V3 + Y14V4 Bus 2: I2 = (y21 + y23 + y24 + yc21 + yc23+ yc24)V2- y21V1 y23V3 y24V4 = Y21V1 + Y22V2 + Y23V3 + Y24V4 Bus 3: I3 = (y30 + y31 + y32 + yc31+ yc32)V3 y31V1 y32V2 = Y31V1 + Y32V2 + Y33V3 + Y34V4 Bus 4: I4 = (y40 + y41 + y42 + yc41+ yc42)V4 y41V1 y42V2 = Y41V1 + Y42V2 + Y43V3 + Y44V4 Finally, Diagonal elements Y(i,i) and off diagonal elements Y(i,j) of the admittance matrix are calculated as follows; = y12 + y13 + y14 + yc12 + yc13+ yc14 = -j8 -j4 j2.5 + j0.1 + j0.1 +0.1j = -j14.2 pu = y21 + y23 + y24 + yc21 + yc23+ yc24 = -j8 -j4 j5 + j0.1 + j0.1 +0.1j = -j16.7 pu = y30 + y31 + y32 + yc31+ yc32 = -j08 -j4 j4 + j0.1 +0.1j = -j8.6 pu = y40 + y41 + y42 + yc41+ yc42 = -j0.8 -j2.5 j5 + j0.1 +0.1j = -j8.1 pu = y12 = -(-j8) = j8 pu = y13 = -(-j4) = j4 pu = y14 = -(-j2.5) = j2.5 pu = y21 = -(-j8) = j8 pu = y23 = -(-j4) = j4 pu = y24 = -(-j5) = j5 pu = y31 = -(-j4) = j4 pu = y32 = -(-j4) = j4 pu = y34 = 0 pu = y41 = -(-j2.5) = j2.5 pu = y42 = -(-j5) = j5 pu = y43 = 0 pu Therefore, admittance matrix Ybus is as follows; Ybus = = Annex-1: Matlab source code and Calculation results with Matlab Matlab Source Code % define self admittance and mutual admittance by using admittace between % the buses (y12=y21=-j8, y13=y31=-j4, y14=y41=-j2.5, y23=y32=-j4, % y24=y42=-j5, y34=0, y43=0, y30=-j0.8, y40=-j0.8 y12=-8i; y21=-8i; y13=-4i; y31=-4i; y14=-2.5i; y41=-2.5i; y23=-4i; y32=-4i; y24=-5i; y42=-5i; y34=0; y43=0; y30=-0.8i; y40=-0.8i; Y11=-8i-4i-2.5i; Y12=8i; Y13=4i; Y14=2.5i; Y21=8i; Y22=-8i-4i-5i; Y23=4i; Y24=5i; Y31=4i; Y32=4i; Y33=-0.8i-4i-4i; Y34=0; Y41=2.5i; Y42=5i; Y43=0; Y44=-5i-2.5i-0.8i; %Bus 3 and Bus 4 is not connected, so admittance Y34 and Y43 are equal to zero % define the 44 admittance matrix (Ybus) Ybus=[Y11 Y12 Y13 Y14; Y21 Y22 Y23 Y24; Y31 Y32 Y33 Y34; Y41 Y42 Y43 Y44]; % In order to define the nodal equation (I = Ybus*V), the given I needs to defined. i1=0; i2=0; i3=-i; i4=-0.4808-0.4808i; Ibus=[i1; i2; i3; i4]; % Each bus voltage can be calculated by using matrix division (V= YbusI) Vbus=YbusIbus; v1=Vbus(1,1); v2=Vbus(2,1); v3=Vbus(3,1); v4=Vbus(4,1); % Calculate voltage difference between buses v12=v1-v2; v13=v1-v3; v14=v1-v4; v21=v2-v1; v23=v2-v3; v24=v2-v4; v31=v3-v1; v32=v3-v2; v34=v3-v4; v41=v4-v1; v42=v4-v2; v43=v4-v3; % current flow between buses can be calculated by i12 = y12*(v1-v2) i12=y12*v12; i13=y13*v13; i14=y14*v14; i21=y21*v21; i23=y23*v23; i24=y24*v24; i31=y31*v31; i32=y32*v32; i34=y34*v34; i41=y41*v41; i42=y42*v42; i43=y43*v43; % apparent power can be calculated by s12 = v1 * conj(i12) s12=v1*conj(i12); s13=v1*conj(i13); s14=v1*conj(i14); s21=v2*conj(i21); s23=v2*conj(i23); s24=v2*conj(i24); s31=v3*conj(i31); s32=v3*conj(i32); s34=v3*conj(i34); s41=v4*conj(i41); s42=v4*conj(i42); s43=v4*conj(i43); % Real power and Reactive power can be derived by following p12=real(s12); p13=real(s13); p14=real(s14); q12=imag(s12); q13=imag(s13); q14=imag(s14); p21=real(s21); p23=real(s23); p24=real(s24); q21=imag(s21); q23=imag(s23); q24=imag(s24); p31=real(s31); p32=real(s32); p34=real(s34); q31=imag(s31); q32=real(s32); q34=imag(s34); p41=real(s41); p42=real(s42); p43=real(s43); q41=imag(s41); q42=real(s42); q43=imag(s43); % end Matlab Calculation Results

Global Leadership And Organizational Behavior

Global Leadership And Organizational Behavior Leadership has stimulated thousands of research studies for social scientists for over 60 years (Yukl, 2006). More than four hundred definitions have been proposed to explain the dimensions of leadership (Crainer, 1995; Fleishman et al., 1991), yet Crainer (1995) addressed that it is a veritable minefield of misunderstanding and difference through which theorists and practitioners must tread warily (p. 12). Leadership is, therefore, not an easy concept to define. Whilst one definition of leadership, directly related to our discussion, is the system proposed by Stogdill (1950), whose work had a profound impact on one of stages of research to be encountered below: Leadership may be considered as the process (act) of influencing the activities of an organized group in its efforts toward goal setting and goal achievement (p. 3). Three elements can be addressed in this definition: influence, group and goal. First, leadership is viewed as a process of influence where the leader has an impact on others by inducing them to behave in a certain way. Second, that influence process is conceptualized as taking place in a group context. Collinson (2009) argues group members are invariably taken to be the leaders followers, although that is by no means obligatory. He, however, emphasizes that without followers leaders do not exist and that leadership only exists in the interaction between leaders and followers. In addition, Parry and Bryman (2006) add leadership, being a process of influence, need not come from the person in charge, but can come from anyone in the group. Third, a leader influences the behavior of group members in the direction of goals with which the group is faced (Mullins, 2008). Moreover, leaders must help create cohesive and motivated teams (Knippenberg DeCremer, 2008). They must sell, or champion , new initiatives (Howell and Boies, 2004). And leaders must help people make sense of crises (Drazin et al., 1999). 2.2 Global Leadership and Organizational Behavior Effectiveness (GLOBE) Project 2.2.1 Introduction of GLOBE Project Global Leadership and Organizational Behavior Effectiveness (GLOBE) Project highlighted the investigation of leadership, national culture and organizational practices concentrated on further sharpening and refining the cultural knowledge for providing a systematic and integrated methodology on the interaction of cross-cultural management (Chhokar, et al., 2007; House, 2004a; Gupta and House, 2004). Based on the quantitative data of 17,000 managers in 62 societies, GLOBE as a ten-year research program is supported by 150 investigators throughout the world (House, 2004b). The major constructs investigated in the GLOBE Program are nine dimensions of cultures in the perception of global leader behaviors: Power Distance; Uncertainty Avoidance; In-Group Collectivism; Institutional Collectivism; Gender Egalitarianism; Performance Orientation; Assertiveness Orientation; Future Orientation; Humane Orientation. 2.2.2 Intellectual Roots of GLOBE Constructs Gupta and House (2004) emphasized that GLOBE constructs were theoretically derived, and empirically validated. They argued that Power Distance and Uncertainty Avoidance are based on Hofstedes (1980) work; In-group Collectivism measures pride in, and loyalty to, the family, and is derived from the Triandis et al. (1988) work on in-groups; Institutional Collectivism captures (inversely) the same construct as Hofstedes Individualism. They addressed that Hofstedes (1980) construct of Masculinity was used as a basis to develop the two distinct dimensions: Gender Egalitarianism and Assertiveness Orientation. Gender Egalitarianism is similar to the United Nations Development Programs (UNDP) concept of Gender Empowerment. Assertiveness Orientation is rooted in the interpersonal communication literature (Sarros Woodman, 1993). In addition, they claimed that Performance Orientation was derived from McClellands (1961) work on the need for achievement. Future Orientation is derived from Kluckho hn and Strodtbecks (1961) Past, Present, and Future Orientation dimension, and from Hofstedes (2001) Long Term Orientation, which focuses on the temporal mode of the society; and Humane Orientation has its roots in Kluckhohn and Strodtbecks (1961) work, Human Nature is Good versus Human Nature is Bad dimension. 2.2.3 Strategic Significance of Cultural Dimensions 2.2.3.1 Power Distance Hofstede (2001) and Schwartz (1994) address that Power Distance refers to a cultures preference for differentiated, hierarchical versus undifferentiated, egalitarian status within the society. Building on their work, the GLOBE Project definition of Power Distance is the degree to which members of an organization or society expect and agree that power should be shared unequally (House and GOLBE Program, 2004, P.517). Therefore, lower-status individuals are expected to concede to higher-status individuals who, in turn, have the responsibility to attend to the needs of the lower-status individuals. In cultures low in power distance, superior-subordinate relations are theoretically close and less formal in nature; in cultures high in power distance, their relationships are expected to be more hierarchically distant, ordered and reserved (House and GOLBE Program, 2004). Beliefs about the appropriate Power Distance between authorities and subordinates could shape the nature of peoples relationship with authorities (Offermann and Hellmann, 1997). Power Distance, therefore, is highly relevant to the study of leadership. High Power Distance indicates a preference for autocratic and paternalistic management, while low Power Distance requires more managerial consultation and approachability (Gupta and House, 2004). 2.2.3.2 Uncertainty Avoidance The dimension of Uncertainty Avoidance is concerned with the extent to which people seek orderliness, consistency, structure, formalized procedures, and laws to deal with naturally occurring uncertain and important events in their daily lives (Luque and Javidan, 2004). People socialized to have a high need for security are likely to resist change because it threatens their feelings of safety. In higher uncertainty avoidance societies, more priority is given to the training of experts rather than lay people for particular tasks (Hofstede, 2001). Here, Citizens are not only more dependent on government, but they want it that way. (Hofstede, 2001, P. 172) Uncertainty Avoidance is also associated with tight societies, where social solidarity and stability is emphasized (Hofstede, 2001). Thus, Uncertainty Avoidance is related to the values of personal conformity, resistance to social change, interest in national rather than international affairs, and a call for national leadership (Eckhardt, 1971). On the other hand, the loose societies tend to be less uncertainty avoiding. Here the values of group organization, formality, permanence, durability and solidarity are undeveloped, and deviant behavior is easily tolerated (Pelto, 1968). 2.2.3.3 In-Group Collectivism In-Group Collectivism relates to how the individuals relate to their family, as an autonomous identity or alternatively as consciousness of responsibilities towards their family (Gelfand, et al., 2004). It is associated with pride in affiliation and a general affective identification with, and a general affective commitment towards, family, group, community, and nation (OReilly and Chatman, 1986). In strong in-group collective cultures, people from birth onwards are integrated into strong, cohesive in-groups, which throughout peoples lifetime continue to protect them in exchange for unquestioning loyalty. (Hofstede, 1980: 51) In such cultures, there is an emphasis on collaboration, cohesiveness and harmony, as well as an effort by people to apply skills for the benefit of their family or in-group. The in-group serves three basic needs: the need for affiliation, involvement, inclusion and belongingness; the need for intimacy, affection, and a sense of identity; and the need for social security, support, control, and power (Schutz, 1958; Festinger, 1954). It represents a high degree of emotional attachment and personal involvement of people in the larger group, and thus fosters an interest of the people in the overall best interests of the group (Allen Meyer, 1990). In-group collectivism fosters connectivity to a group primarily because people want to be a member of the group and only secondarily because they ought to or need to. 2.2.3.4 Institutional Collectivism The dimension of Institutional Collectivism is reflected in preferences for closer work relations and higher involvement with ones social unit (Chhokar, et al., 2007). Institutional Collectivism emphasizes shared objectives, interchangeable interests, and common social behaviors of the people based on association with others in groups (Chatman et al., 1998). In contrast, a lack of institutional collectivism tends to be associated with a preoccupation with self-esteem (Bellah et al., 1985). In less institutionally collective societies, people remember their past performance as much better than it actually was (Crary, 1966), claim more responsibility than their spouses give them credit for in household tasks (Ross and Sicoly, 1979), judge positive personality attributes to be more appropriate in describing themselves than in describing others (Alicke, 1985), and take credit for success, yet attribute failure to the situational variables (Zuckerman, 1979). Institutional Collectivism ten ds to be greater in the Eastern parts of the world, which typically rely on stable informal institutions for social stability and economic activity, as compared to most societies in the West, which rely on more formalized institutions (Gupta, Sully and House, 2004). 2.2.3.5 Gender Egalitarianism Gender egalitarianism reflects an inherent understanding between men and women, which enhances their ability to work together in social and economic spheres (Gupta, Sully House, 2004). Gender egalitarianism, therefore, influences role differences between men and women, as well as the common values of men and women. In gender egalitarian societies, gender discrimination is mitigated, enabling women to engage fully in both the public and the community domains (Coltrane, 1988). In contrast, in most societies of the world where men traditionally are engaged in jobs that do not sufficiently reward women for their labor, women often work part-time in feminine jobs, such as family maintenance activities, nurturance, and relationships with others in a service capacity (Littrell, 2002). Thus, gender egalitarian societies not only tolerate diversity, but also emphasize understanding, respect, and the nurturing of diversity in their communities, through sustained committed efforts (Martin, 1993). 2.2.3.6 Performance Orientation The performance orientation dimension reflects the extent to which a society encourages and rewards improved performance, goal-oriented behavior, and innovation (Gupta, Sully and House, 2004). Performance oriented societies put a thrust on achievement motivation, or need for achievement (McClelland, et al., 1953). The achievement motive translates into behavior through two major components: the hope for success (approach) and the fear of failure (avoidance) (Gupta and House, 2004). People with high achievement motive tend to approach rather than avoid tasks related to success, because for them success is a culmination of ability and hardwork about which they are confident of (Weiner, 1980). But in the face of continuing obstacles, they respond with a helplessness response, involving avoidance of challenge and a deterioration of performance (Diener and Dweck, 1980). They seek positive feedback and focus their efforts in areas in which they have already been successful (Dweck, 1986; Dw eck and Leggett, 1988). 2.2.3.7 Assertiveness Orientation The dimension of assertiveness orientation is associated with a strong consciousness, expression, articulation, and communication of ones thoughts, feelings, beliefs, and rights; in public, political and social forums, and is related to physical and psychological aggressiveness and confrontation (Gupta and House, 2004; Hartog, 2004). People in assertive societies stand up for their individual or collective rights, and demonstrate strong interpersonal competence (Lange Jakubowski, 1976). Assertiveness implies an action-oriented focus, founded on confident decision-making behavior, and characterized by strength, forcefulness, courage, initiative, conviction, and determination (Sarros Woodman, 1993). Assertive societies emphasize social skills and communication, direct personal influence and expression, and overall inter-personal effectiveness (Crawford, 1995). 2.2.3.8 Future Orientation The dimension of future orientation is reflected in behaviors such as planning, preparing and investing for the future (Ashkanasy, et al., 2004). It is related to the concept of short-term vs. long-term orientation (Hofstede, 2001). At a much deeper level, it is also associated with the distinction between materialistic vs. spiritual orientation (Cervantes Ramirez, 1992). Less future oriented cultures focus on the short-term materialistic considerations of respecting traditions to avoid isolation from the society, and maintaining face to protect ones reputation and creditworthiness in the society (Ashkanasy, et al., 2004; Hofstede, 2001). In contrast, more future oriented cultures emphasize long-term considerations of education for self-development, and the inner ability to persist in the face of obstacles for self-actualization (Gupta and House, 2004). Therefore, in the less future oriented cultures, people seek material acquisitions to make their life more meaningful; in future or iented cultures a strong concern for virtue allows a pragmatic integration of morals and practice (Hofstede, 2001). 2.2.3.9 Humane Orientation The dimension of humane orientation is concerned with generosity, compassion, and empathy for others (Kabasakal and Bodur, 2004). The value of humane orientation is deeply rooted in the human experience, and in the moral values arising from the situational and spontaneous demands of this human experience (Kurtz, 2001). Five distinct characteristics of humane oriented societies can be identified (Kurtz, 2001): Concern with Happiness: Humane oriented societies emphasize individual and social pursuit of happiness; Human Equality: Humane societies recognize equality and dignity of each person, and identify people as ends, not merely as means; Moral Freedom: Humane societies focus on the development of modem values of high intelligence, morality and aesthetics, and help individuals freely express their own needs and diverse views on life; Respect for Diversity: Humane societies instill tolerance for diversity of values and norms in individuals and groups without forcing dogmatic similarity. They encourage responsibility and consideration for others. Thus, these societies are founded on moral and civil virtues, such as honesty, uprightness, truth, sincerity, integrity, fairness and empathy; Experiential Reason: Humane societies recognize the need for evolving and discovering new moral principles as societal situations change. 2.2.4 GLOBE Project in China Although the history of China has been marked by periodic political upheavals, yet China, as a united country has experienced the longest span of homogeneous cultural development of any society in the world (Child, 1994). Chinese culture and tradition is deeply rooted and omnipresent in its present society. Fairbank (1987) argues that the influence of Chinas long past is ever-present in the practices of government, business and interpersonal relations. Other researchers have also emphasized the influence of Chinas culture in the way that its organizations are managed (e.g. Lockett, 1988; Pye, 1985; Redding, 1980). While there exist great differences in terms of political, social and economic dimensions among Chinese societies where Chinese culture dominates, it is still possible to identify certain core culture characteristics that are held in common by these Chinese societies. Therefore, the results from the GLOBE Project about Chinese societal culture and organizational culture will be presented as follows. 2.2.4.1 Power distance The two Chinese scores on Power Distance As Is (5.04) and Should Be (3.10) showed the largest discrepancy among the nine pairs of scores. In fact, scores of all countries on Should Be were lower than As Is, showing a common desire that people in all these countries aspire for more equality than they currently have. The relatively higher ranked Chinese Should Be score (12th) compared to As Is (41st) among the 61 countries may indicate that, compared to managers from other countries, the Chinese managers demonstrate a higher level of tolerance for inequality of power in society. The discrepancy between Chinas two scores may be viewed as an indicator of the existing two forces: whereas traditional values are still highly respected, and constantly pull back Chinese organizational leaders, the internal desire to become competitive, and the external pressure to do so, are all pushing Chinese organizational leaders toward modern Western ideologies (Fu, et al., 2004, p. 891). 2.2.4.2 Uncertainty Avoidance Chinas two scores on Uncertainty Avoidance are fairly consistent between As Is (4.94) and Should Be (5.28), ranking 10th and 9th, respectively. The high Chinese scores are consistent with the traditional Chinese value of order. Starting with Confucius, the Chinese seek peace and security by clinging to the past. For centuries, Chinese people were comfortable and felt secure only when they played-it-safe (Fu et al., 2004). It may sound bizarre to Westerners, actually ridiculous even to us Chinese now, but it was unfortunately true that during the 1960s and 1970s people in China were led to seek unity and order to such a degree that they would run their businesses the same way year after year without change, maintaining the same structure, the same products, the same everything (Bachman, 1991). Therefore, if one understands the long history and the traditional values of order, one should have no problem understanding why the current Chinese society has such a high intolerance for uncer tainty (Fu et al., 2004). It is true that all Chinese people enjoy the better living they have now and welcome change in that sense, but many of them are worried about the loss of order, therefore longing for more rules and regulations to reduce uncertainties (Chu, 1988). 2.2.4.3 In-Group Collectivism Chinese scores on family cohesiveness As Is (5.80, ranked 9th) were slightly higher than the scores on family cohesiveness Should Be (5.09, ranked 58th). The concept of family has always been discouraged. In China, altruism and loyalty, loyalty to parents a home and to bosses at work, are values that the society tries very hard to instill in children (Chen, 2001). A close parent-children relationship is a virtue that is widely respected and valued. Chinese parents take great interest in their children throughout their t lives, and their children, imbued with the doctrine of filial piety, are constantly reminded of their filial duty towards their parents (Chao, 1983, p.72). The reforms, nevertheless, have forced the Chinese to take care of themselves. A study that compared values held by Chinese managers before and after the Tian An Men Square incident in 1989 found a growing spirit of Chinese-style individualism, which is tempered by cultural relationships and centralized controls, yet compatible with Western values (Ralston et al., 1995, p.15).Young people are becoming increasingly independent. In addition, one-child-per-family policy also makes it impossible to maintain some of the traditional values of a family (Chen, 2001). That is probably a good reason explaining why the Chinese score on family collectivism Should Be is much lower than its score on in-group collectivism As Is (Fu et al., 2004). 2.2.4.4 Institutional collectivism For centuries, the individual as an end in itself was de-emphasized in Chinese society. Instead, the network of obligations and responsibilities as a group member of the society was emphasized (Chew and Putti, 1995). As Michael Bond (1991) described it: Chinese think of themselves using more group-related concepts than Americans do; and they see their ideal self as being closer to their social (or interpersonal) self than Westerners do (p,34). Based on these traditional values, the Chinese score on Institutional Collectivism As Is (4.77) was among the highest, ranking 7th among the 61 countries, meaning Chinese society is very collectivistic. The Chinese score Institutional Collectivism Should Be (4.56), however, is slightly lower compared to the As Is score. Although it ranked in the middle (36 among the 61 countries), the absolute difference between the two scores was very minimal (0.21). The relative discrepancy to other countries may be the result of the changes taking place in C hina. Like many other Chinese cultural ideologies that are being threatened by the acceptance of Western views, the collectivistic orientation, too, is being challenged (Chen, 1995). Individual contributions are now being acknowledged and rewarded. However, overall, peoples values in collectivism are still quite consistent with the traditional values (Fu et al., 2004). 2.3 Confucianism and Guanxi 2.3.1 Confucianism on Relationships The philosophy that is known as Confucianism comes mainly from the speeches of Confucius and writings of his disciples. Confucianism has been the main foundation of traditional thought that is deeply rooted in Chinese society. Confucianism is ethical teachings rather than a religion as described in Western literatures. Confucianism is widely regarded as the behavioral or moral regulations that are mainly concerned with human relationships, social structures, virtuous behavior and work ethics. In Confucianism, rules are specified for the social behavior of every individual, governing the entire range of interpersonal relations within the society. The core virtues of Confucius basic teaching can be extracted as Ren (Humanity), Yi (Righteousness), Li (Propriety), Zhi (Wisdom) and Xin (Faithfulness). According to Confucius, each person had a specific place in society, certain rules to follow and certain duties to fulfill. Confucius hoped that if people knew what was expected of them they would behave accordingly. He, therefore, set up Five Cardinal Relations, in which most people are involved, moreover he also laid down the principles for each relation. These can be illustrated as follows: Basic Human Relations Principles Sovereign and subject (master and follower) Loyalty and duty Father and son Love and obedience Elder and younger brothers Seniority and modeling subject Husband and wife Obligation and submission Friend and friend Trust Source: Fan, 2000 All of these five, except the last, involve the authority of one person over another. Power and the right to rule belong to superiors over subordinates. Each person has to give obedience and respect to his/her superiors; the subject to his/her ruler, the wife to her husband, the son to his parents, and the younger brother to the older brother. The superior, however, owes loving responsibility to the subordinates. These relationships are structured to generate optimal benefits for both parties, and the principles are laid to achieve a harmonious society (Fan, 2000). Among these five basic human relations, three are family relations, which show strong family-orientation in the Chinese society. Such a characteristic when applied to organizational management, leads to the birth of a paternalistic management style in Chinese society (Hsiao, et al., 1990). As China is a high context culture (Hall, 1976) and places much emphasis on Confucianism, relationships within the Chinese society have been explained in terms of harmony, hierarchy, and development of morality and kinship (Shenkar and Ronen, 1987). Defining Guanxi Under the impact of Confucianism, China is a nation whose social relationships are neither individual-based nor society-based, but typically a relationship-based society (Liang, 1974), in which almost everyone tries to maintain Guanxi. Guanxi, which literally means social relationship or social connection, is a prevalent cultural phenomenon that has strong implications for interpersonal and interorganisational dynamics in Chinese society. The concept of Guanxi is enormously rich, complex and dynamic (Yang, 2001). In English as well as Chinese, it can be defined at various levels and from different perspectives. Chen and Chen (2004) argue that rather than social networks or interpersonal relationships found in the Western literature, Guanxi should be viewed as an indigenous Chinese construct and should be defined as an informal, particularistic personal connection between two individuals who are bounded by an implicit psychological contract to follow the social norms as maintaining a long-term relationship, mutual commitment, loyalty, and obligation. The Confucian heritage of Guanxi The connotations of Guanxi vary greatly in different Chinese societies and may change over time even within a single Chinese society. However, some of the fundamental meanings of Guanxi are still traceable in ancient Chinese philosophical writings, particularly the analects of Confucius (Lau, 1983). King (1991) was among the first who took a theoretical approach to explore in to Confucianism for the historical and cultural roots of Guanxi. He contended that instead of Guanxi, the word Lun is used in the Confucian classics, which captures some of the most essential aspects of the ancient Chinese social, political and moral philosophy. Expanding the understanding of Lun may shed lights on the historical backgrounds of Guanxi. First, Lun attaches paramount importance to human relationships. The Five Cardinal Relationships as a whole, pictures a social system advocated by Confucius to achieve harmony, integration, and development through a hierarchical form. Inside this system Chinese people view themselves interdependent with the surrounding social context, and the self in relation to others becomes the focal individual experiences (Luo, 1997). Although the structural framework of relationship evolved since Confucius time, modern Chinese societies, both mainland and overseas still remain relationship-oriented (Redding and Wong, 1986) or in other words Guanxi-oriented. Second, Lun stresses social order. In Confucian society, everyone knows their own place and whom they must defer to. These status differences are regarded as the appropriate way of conducting relationships and are accepted and maintained at all levels of the hierarchy (Bond, 1991). Rights and obligations of the individuals also differ according to each ones position in society. Third, Lun refers to moral principles in regard to interactive behaviors of related parties. Confucianism has been a main pillar of current Chinese society for forming individual morality as well as for building harmonious community. Confucian principles put emphasis on self-cultivation and sociopolitical harmony. For example, considering the Confucian sociopolitical norms for the ruler, Confucius suggests that those who want to be rulers have to be ethical leaders having virtuous characters and attitudes. However, just as the relationships are highly differentiated, so are the moral principles. In Confucianism, furthermore, there is no universal moral standard applicable to all human relationships. Instead, each relationship has its own moral principles. The concept of Guanxi is embedded within the Confucius philosophy and it subtly defines the Chinese moral code and perpetuates its influence in Modern China (King, 1993). Lun in Confucius philosophy is actually a concise description of Guanxi. As a social hierarchical theory, Lun has prompted almost all Chinese rulers to adopt Confucianism as a strategic tool to achieve social stability in the Chinese society (Man and Cheng, 1996). 2.3.4 Characteristics of Guanxi Chinese people attach great importance to face (Mianzi). Face in Chinese context refers to an intangible form of social currency and personal status, which is affected by ones social position and material wealth (Park and Luo, 2001). Chinese people value the enjoyment of prestige without the loss of face and saving of others face (Hwang, 1987). Therefore, to cultivate Guanxi and expand the Guanxi network, it is necessary to maintain a certain level of face. Renqing, as elaborated by many scholars (e.g. Luo, 2007) is another Chinese philosophy related to Guanxi. It refers to an informal social obligation to another party as the result of a favor gained from a Guanxi relationship. On the one hand, Chinese people weave Guanxi web in their daily life; on the other hand, they are bound by Renqing obligations. Tsui and Farh (1997) contend that in essence, reciprocity, he/she not only loses his/her own face but also jeopardize his/her Guanxi. Based on its Confucian heritage and those philos ophical foundations like face and Renqing, Guanxi in Chinese context is characterized by some principles. First, Guanxi operates in concentric circles, with close family members at the core and with distant relatives, classmates, friends, and acquaintances arranged around the core according to the distance of the relationship and the degree of trust (Yang, 1994). In a preordained relationship, e.g. family, since ones behavior and responsibilities are largely fixed, his/her behavioral expectations and individual desires are heavily suppressed. However, in an external Guanxi network beyond the preordained relationship, one has considerable freedom in deciding whether to enter into voluntarily constructed relations (King, 1991) or not. Second, Guanxi operates in an exclusive manner. It is network-specific and does not extend to members of other social networks. Many observers have noted that in comparison to Westerners, Chinese have a stronger tendency to divide people into different levels of categories and treat them accordingly in terms of ingroup-outgroup boundary (Triandis, 1989). Guanxi binds people together and defines those who are ingroup and/or outgroup people. Ingroup members are always protected and benefited while outgroup people are walled off and may be rejected (Hui and Graen, 1997). To develop Guanxi is to form the basis for a gradual transition from an outsider to an insider so that a long-term close relationship can be built. Entering such networks ensures trust building, decision-making, and competitive advantages for network members (Haley, Tan Haley, 1998). Third, Guanxi is reciprocal. A person will lose his/her face and be viewed untrustworthy if he/she does not follow the rules of reciprocity and refuse to return a favor (Alston, 1989). In Western networks, reciprocity often requires exchanges of roughly equivalent value (Powell, 1990). However, the Chinese Guanxi network is often implicit, without time specifications, and not necessarily equivalent. Guanxi links people of different social ranks, and usually the weaker party can call for special favors from the str