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3983 Uppsatser om Electrical distribution systems - Sida 41 av 266
Digital Airsoftstyrning : DAC Mark.I
The Airsoft Community always search for realism and optimal performance.When the performance and/or the realism in your AEG1 aren?t enough you turn to modifications toimprove the weapon. But to manufacture such modifications isn?t that easy, hence you turn tocompanies that are specialized in creating such devices.The goal with this project is to create a prototype of a modification called ?Programmable MOSFET?and targets optimization of the electrical components within the AEG. This means that you digitalizethe control of your AEG thus entails new functions and more stability to the system that isn?t possiblewith its mechanical predecessor.A prototype has been manufactured and programmed with functions according to requirementspecificationsthen it was tested on an airsoft-gearbox with rewarding results.
Förbättring av mjukvarubibliotek för parallellberäkningar med programmeringsmodellen Chunks and Tasks
Chunks and Tasks is a programming model based on the C ++ programming language. This programming model is used for electronic structure calculations, among other things.The purpose of this project is to improve the CHT-MPI software library for Chunks and tasks, so that calculations of matrix-matrix multiplications are performed more efficiently than they do with the existing software library. The software library is based on the work stealing method, which is a method the software library for Chunks and Tasks uses for the distribution of the calculation work. The considered way to improve the software library is by modifying the work stealing method in a way that makes the distribution of calculation work happen in a more efficient way , which will lead to calculations performed faster than before.Two different modifications of the work stealing method were tested and it led to two new methods, Method 1 and Method 2, which distributed the calculation work differently. Method 1 did not give results that were compatible with the theory, since the calculation time with this method was much longer than the previous method.
Systemutveckling och användbarhet -Att utnyttja användbarhetstester i systemutvecklingsprocessen
Den här rapporten behandlar frågeställningen om hur man kan anpassa systemutvecklingav ett informationssystem enligt livscykelmodellen till att inkludera användbarhetstester. Frågeställningen grundar sig i att god användbarhet inte är ett explicit uttryckt mål i Andersens beskrivning av livscykelmodellen. För att besvara frågeställningen har vi utvecklat och testat ett bokningssystem åt en mindre verksamhet. Utvecklingsarbetet har bedrivits enligt en egen anpassning av livscykelmodellen. Testerna har utförts enligt metoden cooperativ evaluation.
Underlag till klimatledningssystem för skolor
The climate issue is a significant question, and the problem is mainly caused by human activities. Everyone can help to counteract the enhanced Greenhouse effect by reducing the amounts of energy they use and by not consuming more products then they need.Schools are some of societies many consumers and therefore contribute to the Greenhouse effect. The School also has an important task; to teach and disseminate knowledge and information about the climate and the environment. According to the Swedish National Agency for Education, Skolverket, must all schools regularly consider the environment and sustainable development throughout the entire education process. Unfortunately, this is not the case for many schools in Sweden today.One of many tools that can be used to coordinate environmental work and initiatives, and also to make it more efficient, is environmental management systems.
Level-Up! : En uppsats om spelutvecklares väg till ökad autonomi
Vår uppsats fokuserar på data- och tvspelsbranschen med en inriktning på relationerna mellan spelutvecklare och spelutgivare. Bakgrunden till uppsatsen och studien bygger på att maktbalansen mellan spelutvecklare och spelutgivaren faller i favör för spelutgivaren som ofta kontrollerar både finansiering och distribution av en spelproduktion. Detta skapar en situation där spelutvecklaren, som står för den skapande delen av en spelproduktion, har liten till ingen kontroll över sin egen verksamhet. Denna balans håller på att förändras genom uppkomsten av nya finansierings- och distributionsalternativ som tillåter spelutvecklaren att förbigå spelutgivarens inblandning i spelproduktionen. I vår uppsats har vi valt att undersöka hur folkfinansiering, digital distribution och mun till mun-marknadsföring påverkar spelutvecklares autonomi.
Flygbesiktning av Luftledningar : Modellering av samband mellan besiktningsanmärkningar och systemtillförlitlighet
This paper thoroughly investigates needs and requirements for overhead distribution feeder inspection and develops models to investigate possible relations between short term inspections remarks and outages. The study was conducted in collaboration with Fortum Distribution AB that supplied extensive information about their overhead power feeders concerning both inspection and power outages. The investigated models where lognormal linear model, Poisson generalized linear model and negative binomial generalized linear model. All models were implemented utilizing offset terms to compensate for differences in feeder length and amount of overhead versus underground feeders. The Poisson generalized linear model was rejected at an early stage due to overdispersion and neither of the remaining models fit the data perfectly.
Distribution Av Pejlbäringar Över IP-nät
The objective of the thesis is primarily to conform and encode a digital signal to be controlled by software. The idea is to transport today?s tracesignal through the IP-network instead of cable-net. In this report I will suggest a possible solution to get a fully passed result with no peculiar time delay. I will also suggest some ideas for a future work with the new tracesystem..
Värmeförluster vid utvändigt placerade ventilationssystem
To be able to handle tomorrows need for limited energy consumption we need to reduce our use of energy. The building sector stands for around 40 % of all energy consumption in the society. The government has put up a goal to reduce the energy consumption in our buildings with 20 % by year 2020 and 50 % by year 2050 compared with year 1995. To be able to do reach that goal we need a more energy efficient building stock.The main part of the energy used in our buildings is used for space heating. By installing ventilation systems with heat recovery on the exhaust air it is possible to use the heat-energy in the exhaust air to warm up the incoming air.
Rummets betydelse för kunskapsproduktion ? en tolkning av Lunds stadsbiblioteks funktioner i ljuset av dess arkitektur
This paper aims to apply a specific architectural theory onto Lund City Library in order to achieve a better understanding of how the physical concept of the library is affecting our knowledge and our production of meaning; and furthermore how it suggests a certain form of usage. This paper discusses the ways in which architecture is affecting us when we use the library. The paper attempts to answer the following question: ? Which one of Koch?s spatial structures could apply to Lund City Library, and in which ways could this spatial structure be a producer of meaning? The specific architectonical theory used is developed by Daniel Koch in his paper Spatial Systems as Producers of Meaning: the Idea of Knowledge in Three Public Libraries. This theory is the method of the paper as well.
Ants and termites in small-scale plantain farms in Uganda : a comparison between agroforestry and non-agroforestry farms
This study was conducted in Kkingo district, west of Masaka, Uganda. It compared soil macrofauna abundance in non-agroforestry farms with that of agroforestry farms. The agroforestry farms had participated in the Vi Agroforestry´s program between 1995 and 2006, and continued on their own after 2006, when Vi Agroforestry left the area. The soil macrofauna is important for soil structure and processes that are contributing to soil organ-ic matter decomposition and nutrient mineralization. They are also predators of potential pests.
Glastaket : ett bärande klimatskal
This candidate.?s work includes designing of a house with it.?s structural components andinstallations. The house had to be actual with Building Regulations (Boverkets Byggregler).Beside designing of all the crucial systems necessary for completing of claimed regulations evenan optional topic within building engineering had to be chosen.The task included designing of heating, ventilation, sanitation and electricity systems. Structuralengineering models has been made in compliance with Eurocodes. Materials for facades, floorsand roof were chosen and evaluated.As recessed portion of the work, evaluating of possibilities in designing of a glass roof waschosen.
Behöver tillväxten en stad? Om Dublin som politisk arena, aktör och tillväxtmotor
This thesis intends to examine the role of the city, Dublin, in the Irish economic growth during the 1990s. It is a case study where Dublin is compared with current theories on post modern cities as growth machines and increasingly prominent actors in the global context. The study has an interdisciplinary approach but focuses on political science issues such as power distribution, global-local governance and local political organisation. It is a theory driven study that also intends to add aspects to the understanding of the cities of our time. I argue that Dublin has faced a lot of changes during the last decades in accordance with the post modern city.
Positive human to cattle interactions and the possibilities to increase animal welfare, economy and safety for farmers
Cattle production systems are changing to bigger intensified systems with larger numbers of animals per farm and more free range systems while at the same time employing fewer people. Aversive handling has been known to affect cattle production negatively for many years, but lately scientists have started to focus more on what positive effects gentle handling and positive human-cattle interactions may have on beef and dairy production. Fear can cause high stress in production animals and this can contribute to not only reduced production within beef and dairy cattle, but also increased risks for accidents and decreased animal welfare. Therefore, by reducing the fear cattle experience of humans, it could be possible to increase production, decrease accidents and increase the welfare of the animals. Reducing the animals fear and stress can be done by simple means, such as walking and talking calmly around the cattle, associating humans to positive feelings (such as feed) and stroking the cattle?s body regions associated with social grooming.
Utvärdering av Skogens Dag i Borås 2005 evenemanget som informationskanal
The purpose of this thesis is to examine Skogsstyrelsens event Skogens Dag as an information channel by looking at information use and information behaviour during the communication process of the event. This is done by examining the aims of Skogsstyrelsens information distribution during the event in relation to its outcomes. The evaluation is focused on long term effects on the target group and it is restricted to Skogens Dag in Borås 2005. The question this thesis intends to answer is: How does the event Skogens Dag function as a tool for information distribution? The theoretical background gives an account of the communication process as well as the relevant aspects of marketing, social marketing, campaigns and public relations, as these are communication attempts that can use an event as a medium.
Bergkyla och bergvärmeutredning för industrilokalen Rödbergsmyran 5 i Umeå, Västerbotten.
Grubbe Ventilation AB is a sheet metal and ventilation company who provides design, installation, service, and repair of ventilation. The company is expanding their business by building a new facility in Umeå, Västerbotten. The property is designed to be used for both office and industrial work.Grubbe Ventelation AB has not yet decided upon wish system which is to be established to provide the building with heating and cooling. The consulting firm Umeå Projekt Team has therefore been asked to investigate the possibilities to invest in geothermal- heating and cooling.If the investigation of a geothermal heating- and cooling system would provide favorable results it would be a very appropriate alternative that provides energy at low costs and are an environmentally friendly option as the energy comes from stored solar energy in the ground is provided by stored solar energy in the ground.The facility ´s heating and cooling consumptions are calculated in the program BV2 and the result indicate a heating demand of 185 000 kWh per year due to thermal transmittance, transmission losses, heating of warm water and a cooling requirement of 5500 kWh.Three different systems of geothermal heating and cooling were tested in the computer program Energy Earth Design. The results show no difference in the dimensioning of the drill hole if merely heating were to be used or both heating and cooling were to be established.