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164 Uppsatser om Differential endurance - Sida 5 av 11
Framtagning av reläskyddsinställningar för en transformatorstation
A substation must be properly protected against lightning and other external effects to the equipment in the station or staff, for that we use relay protection. They should also protect against internal errors which may occur as ground faults. There are different types of protection relays, but most common are overcurrent-, distance-, residual current- and differential protection.The purpose of this thesis was to deepen our knowledge of relay protection and to use the theoretical knowledge we got from the university studies in the work process. In the process we discovered which parameters were the most essential and calculated these for all relay protections on the substation. We also carry out a comparison between two brands of relay protection, ABB and Alstom.During our work we will test and simulate the over-current relays in a program called NEPLAN, the program will also calculate the fault currents.
Social media & marknadsföring
The gas turbines in the Swedish secondary reserve are reaching the end of their technical lifetime, hence alternative solutions need to be considered. One of the solutions thought to have the greatest potential is the use of so called consumptionreduction. By entering contracts with large consumers, agreements are made to reduce consumption in the event of major disturbances in the power system and thus being used as a secondary reserve. This thesis investigates the feasibility of consumption reduction as part of the secondary reserve. This has been achieved by developing a requirement specification for the disturbance reserve and by studying the technical and economic potential for consumption reduction among a range of consumers.The technical potential for consumption reduction that fulfils the requirements for participating in the secondary reserve are on average 750 MW in SE 3 and 98 MW in SE 4.
Experimentell studie av sensationen hos färger
There are a large number of studies on colour and its influence on human feelings, but thereare only a few studies on the association between feelings and colour combinations. Thisstudie investigates the association between colour combinations consisting of three equallysized colours and the feelings they convey. The methodology used in this studie follows theinstructions from the Nippon Colour & Design Research Institute (NCD) in Japan, NCD havestudied consumer psychology towards colour and colour combinations for several decades.This study used semantically differential scales to evaluate existing colour combinations fromNCD to descriptive adjectives and creation of new colour combinations to explore therelationship between colour combinations and conveyed feelings. A total of 69 peopleparticipated in the tests. The main conclusions formed by this study are: (1) the feelingsconnected with the colour combinations differ partly between the Swedish population and theNCD and (2) the Swedish population have similar feeling associations to most colourcombinations, except for trend dependent adjectives such asmodern, cool etc.
Patienters upplevelser av att leva med venösa bensår utifrån ett fysiskt, psykiskt och socialt perspektiv - En litteraturstudie
The purpose of this study was to describe patients? experiences when living with a venous leg ulcer in physical, psychological and social perspectives. The articles used to describe this condition were found in the databases: PubMed and Cinahl. Ten articles were included in the result: five with a qualitative approach, two with a quantitative approach and three with both qualitative and quantitative approaches. The results were presented through three headings: physical, psychological and social.
Effekter av 2 timmars fysisk träning per vecka på uthållighetsstyrka, kondition, rörlighet och kroppssammansättning. : En 7 veckors interventionsstudie på personer med stillasittande arbete.
Studien avser att studera effekterna av arbetsplatsförlagd fysisk träning 2 x 60 minuter/vecka i 7 veckor hos personer med stillasittande arbete påVO2max, rörlighet, uthållighetsstyrka och kroppssammansättning. Vi använder oss av en kvantitativ metod som består av datainsamling genom tester före och efter träningsperioden för både interventionsgruppen (n=25) och kontrollgruppen (n=11). Resultaten visar på signifikanta skillnader hos interventionsgruppen på variablerna VO2max (p=0), visceralt fett (p=0,001), fettmassa (p=0,001), vikt (p=0.006), Body Mass Index, BMI (p=0,005), uthållighetsstyrka enligt Sörensens isometriska uthållighetstest (SIU) (p=0) och Trunk Curl Static Endurance test (TCST) (p=0,045), rörlighet i halsrygg (p=0,010) och rörlighet i hamstringsmuskulatur via Sit and reach test (p=0). Inga skillnader ses i blodtryck och, skelettmuskelmassa i armar, bål och ben. Inga signifikanta skillnader ses hos kontrollgruppen oavsett variabel. Slutsatser av studien är att man kan se effekter genom denna typ av intervention på flera olika variabler och förslag till framtida forskning är att försöka utesluta samverkan av andra faktorer för att ge en mer exakt bild av den fysiska träningens effekter på arbetsplatsförlagd träning..
Utvecklingen av skyttekompanier : Utmaningen att leverera effekt med en efterfrågad resurs även imorgon
Syftet med uppsatsen var att studera hur Försvarsmakten bör organisera, utbilda och träna ett skyttekompani i framtiden inom några områden. Den skall med hjälp av några av de grundläggande förmågorna ge svar på hur vi organiserar, utbildar och tränar idag samt analysera om några förändringar bör ske för att skapa ett bättre förband.Den teoretiska grunden för uppsatsen har varit de grundläggande förmågorna; ledning, rörlighet och uthållighet. Uppsatsen har tagit sin utgångspunkt i bland annat Arméns utvecklingsplan och studien Verkan Mot Markmål. Litteraturstudier har även genomförts av andra studier och dokument. Även två stycken intervjuer har genomförts för att belysa dagsläget respektive framtiden för ett skyttekompani.
Modulgenerator för Matchade Transistorpar
Detta examensarbete syftar till att implementera en modulgenerator som automatiskt genererar ett matchat differentialpar. Detta för att enkelt kunna generera detta vanlig förekommande byggblock utan att behöva rita om allt från grunden. Modulgeneratorn som konstruerats klarar att skapa upp till 2x2 transistor block matchad layout med eller utan sköld. Programmet skapar med hjälp av indata från konstruktören en skräddarsydd layout som kan användas som byggblock i integrerade kretsar. Examensarbetet är slutfört och har genomgått omfattande testning The aim of this thesis is to implement a module generator that automatically generates a matched differential pair.
Utvärdering och jämförelse av olika fälttester för fotbollsspelare
Different field tests are currently used in a wide extent in different levels of soccer teams. To be able to assess the players? physiological status the tests must have high validity, reliability and external validity. Many different tests have been developt, but currently only five of these tests are most commonly used: Yo-Yo intermittent recovery test (YIRT), Yo-Yo intermittent endurance test (YIET), Multi-sprint-test, Beep-test and Cooper-test. Presently there is no definitive conclusion regarding which of these tests is most suitable for soccer players.
Förbrukningsreduktion : Ett alternativ till gasturbiner som snabb aktiv störningsreserv?
The gas turbines in the Swedish secondary reserve are reaching the end of their technical lifetime, hence alternative solutions need to be considered. One of the solutions thought to have the greatest potential is the use of so called consumptionreduction. By entering contracts with large consumers, agreements are made to reduce consumption in the event of major disturbances in the power system and thus being used as a secondary reserve. This thesis investigates the feasibility of consumption reduction as part of the secondary reserve. This has been achieved by developing a requirement specification for the disturbance reserve and by studying the technical and economic potential for consumption reduction among a range of consumers.The technical potential for consumption reduction that fulfils the requirements for participating in the secondary reserve are on average 750 MW in SE 3 and 98 MW in SE 4.
Datormodellering av en värmelagrande betongväggs inverkan på det termiska klimatet i ett växthus
This report describes the building of a computer model that makes it possible to simulate the thermal climate in a greenhouse. The computer model is built on the physical theory of heat exchange that occur in a greenhouse, such as radiation and convective heat exchange. The model also includes the heat storage that is active in a greenhouse.The computer model is used to simulate the thermal climate in a greenhouse under three periods, winter, spring and summer. It also investigates which effect a concrete wall has on the thermal climate in a greenhouse. The purpose of putting a concrete wall in the greenhouse model is to investigate the possibility to store heat during the day and then use this heat when the temperature drops during the night.The result from the simulations shows that a concrete wall levels the big difference in temperature that normally occurs under a day in a greenhouse.
IPad i sfi-klassrummet : Illiteratas tankar och upplevelser av iPad vid läs- och skrivinlärning.
The study aims to investigate what the iPad in SFI education means for the individual when it comes to becoming literate from having been illiterate. The focus of the study is on reading and writing in combination with individual motivation and opinions on iPad as a teaching tool.The study is based on interviews of three illiterate participants of sfi. The interviews give an idea of the individuals´ attitudes to the iPad and whether they think they learn to read and write with the iPad. The study also discusses what the participants think they cannot learn with the iPad.The study also includes two interviews with teachers, which aims to broaden and nuance pictures of how the iPad works in the classroom. Even the teachers' perceptions of the iPad as a teaching tool are examined.
One size does not fit all - En studie om hur tillämpningen av SDT-principen har förändrats inom GATT och WTO
Denna uppsats analyserar utvecklingen av principen Special and Differential Treatment (SDT) i den internationella handelsregimen. Fokus är på förändringen i tillämpningen av denna princip. Uppsatsen identifierar hur principen har tillämpats sen dess uppkomst samt hur ett skifte i det ekonomiska utvecklingstänkandet kom att utgöra en avgörande faktor för den nedgång i tillämpning som observerats. Vidare identifierar uppsatsen också hur nya dimensioner av världshandeln har skapat nya problem för utvecklingsländerna, vilket i sin tur har skapat ett behov av en fortsatt, men i många avseenden annorlunda, tillämpning av SDT-principen.Uppsatsen kommer till slutsatsen att det nya ekonomiska utvecklingstänkandet har suddat ut rationaliteten bakom det forna tillämpandet av SDT-principen. Samma utvecklingstänkande har dock lagt grunden för en ny tillämning.
Hundratusen rullar fram i Sverige : Det enda som stoppar rörelsehindrade är omgivningen
Service Design is a relatively new, unexplored and exciting phenomenon that through an interdisciplinary work methodology designs services. A discussion has been going on for a long time regarding whether there is a difference between products and services. Services are often classified as immaterial, heterogeneous, non-storable and inseparable in relation to products. A question that arises is if something specific characterises the work methodology used regarding service design. The aim with this paper is thus to explain the work methodology when working with service design.
Nedskrivning av goodwill : I vilken utsträckning redovisas upplysningar om koncerngoodwill i enlighet med IAS 36 p134?
Service Design is a relatively new, unexplored and exciting phenomenon that through an interdisciplinary work methodology designs services. A discussion has been going on for a long time regarding whether there is a difference between products and services. Services are often classified as immaterial, heterogeneous, non-storable and inseparable in relation to products. A question that arises is if something specific characterises the work methodology used regarding service design. The aim with this paper is thus to explain the work methodology when working with service design.
Design av Tjänster : Komplex affärsutveckling över tid och rum
Service Design is a relatively new, unexplored and exciting phenomenon that through an interdisciplinary work methodology designs services. A discussion has been going on for a long time regarding whether there is a difference between products and services. Services are often classified as immaterial, heterogeneous, non-storable and inseparable in relation to products. A question that arises is if something specific characterises the work methodology used regarding service design. The aim with this paper is thus to explain the work methodology when working with service design.