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1022 Uppsatser om Distribution - Sida 10 av 69

Analys av systemfaktorers påverkan på tillförlitligheten i distributionsnät

In this master thesis outage statistics covering tree years from two Distribution grids are analyzed with the purpose to deduce which factors yield outages. The statistics are extensive therefore allowing in-depth analysis of both customer and system related factors. From this starting point and as a model of explanation energy not supplied is studied as the consequence and the measurement of the inconvenience caused by outages. Different methods for calculating energy not supplied are developed and studied and put in comparison to the method used in Network Performance Assessment Model, which is the Swedish frame work for regulating electricity Distribution.Analysis of the outage statistics show a relation between the type category of customer and outages that can be deduced to the variance and the density associated with that customer category. Prioritization of different customer categories is elevated also in this aspect.

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.

Trådlöst bredband -bör trådlösa nätverk tillhandahållas kollektivt?

Bredband har de senaste åren gått från att vara en ovanlig företeelse till att i Sverige närmast ses som en mänsklig rättighet. En teknik som ger många individer tillgång till IT-infrastrukur med hög överföringskapacitet är trådlösa nätverk av typerna WiFi och WiMax. I uppsatsen konstateras att ett marknadsmisslyckande kan förekomma på privata marknader för trådlöst bredband. Detta marknadsmisslyckande analyseras utifrån teorier om externa effekter och kollektiva varor. De positiva externa effekter som trådlösa nätverk genererar ger varan drag av kollektivitet.

Framtidens driftcentral : En analys av den framtida driften av ett svenskt elna?t

Active work to increase the efficiency of energy use is taking place in Sweden and throughout all of Europe. Electricity is an important part in our society?s energy system which means that the electrical grid operators and associated therewith has a central role in this work. Monitoring and controlling the electrical grids are managed from the Distribution system operator?s DC, dispatch center.The aim of this report is to examine how the operations in a typical DC on the Swedish electricity Distribution network will look like in five to ten years.

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..

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.

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.

Modellering av försäkringsdata med normal invers gaussisk (NIG)-fördelning

Utbetalningsbelopp för skadeersättning studeras. Datamaterialet uppvisar skevheter och ''tjocka svansar'' vilket motiverar att modellera med en mer flexibel fördelning än normalfördelning. I detta arbete undersöks om NIG (normal invers gaussisk) fördelning passar för det..

Modellering av försäkringsdata med normal invers gaussisk (NIG)-fördelning

Utbetalningsbelopp för skadeersättning studeras. Datamaterialet uppvisar skevheter och 'tjocka svansar' vilket motiverar att modellera med en mer flexibel fördelning än normalfördelning. I detta arbete undersöks om NIG (normal invers gaussisk) fördelning passar för det..

Trattbägarkeramik i Väte : när jordbruket kom till Gotland

This essay is a study and analysis of the funnel beaker pottery at Gullarve 1:13 in Väte parish. The purpose of the study is to analyse the chronology of the settlement by determine the Distribution, stratigraphic context and the ornamentation of the pottery. Another purpose is to discuss the geographical location of the settlement in the landscape.In this essay a short review of the pottery and the funnel beaker culture as well as a description of the pottery from the archaeological excavation from 1984 at Gullarve 1:13 is presented. Since the documentation of the archaeological excavation from 1984 is missing or is very inadequate, no spatial analysis can be carried out. The Distribution of the pottery can?t contribute to the result of the essay, though if possible it probably would have provided some interesting results.

Kvalitetsprocesser för Lagring och Distribution av Livsmedel på Schenker Coldsped

Syftet med examensarbetet är att planera hur Schenker Coldsped ska arbeta för att möta kundens krav, i detta fall Burger King, på att använda regelverket EFSIS ? European FoodSafety Inspection Service. EFSIS erbjuder oberoende inspektionsservice designat för mat, dryck och närliggande branscher. Den standard som Schenker Coldsped AB överväger att certifiera sig emot är EFSIS tekniska standard för lagring och Distribution av livsmedel.Coldsped är en del av Schenker Sverige AB. Företaget arbetar med helhetslösningar för transport och lagring av kylda och frysta livsmedel över hela Europa.

Genetisk variation av betydelse för adenosinsignalering vid nydebuterad reumatoid artrit

Rheumatoid arthritis is an autoimmune disease, where joints are attacked by the own immune system, leading to chronic inflammation and destruction of bone and cartilage. Inflammation is a complex process, controlled by many different substances. One of them is adenosine, which has anti-inflammatory properties. In this project, three polymorphisms in different genes, involved in synthesis and signaling of adenosine, were genotyped for 188 patients with RA and 362 controls without RA. The results shows that for the polymorphism in A2a, a gene coding for an adenosine receptor, there was no significant difference in genotype Distribution between the groups.

Framtagning av normalt referensintervall för RDW och retikulocyter på hematologiinstrumentet ADVIA 2120

Erythropoiesis is a complex and carefully controlled process which is mainly regulated by erythropoietin. Using flow cytometry cells in a blood sample can be analyzed one by one. ADVIA 2120 using flow cytometry for analysis of red blood cells (RBC) and reticulocytes. Red blood cell Distribution width (RDW) is a component of the RBC method. RDW indicates size variation on erythrocytes and is measured as a percentage of the mean cell volume (MCV). By measuring the RDW anemia can be divided into makrocytic, microcytic or normocytic. Reticulocytes refract light more strongly than red blood cells because they contain some cellular debris. The number of reticulocytes in the peripheral blood reflects erythropoiesis in the bone marrow. The purpose of this project was that by approved methods to establish reference ranges for the parameters, RDW and reticulocyte counts.The individuals who participated in the study, n=124, were considered healthy and had varying ethnicity. Reference subjects had not donated blood the last six months and participation in the study was voluntary.The statistic evaluation includes examination of Distribution, and reference ranges for both men and women were established using the 2.5:t and 97.5:t percentiles. The calculated reference interval for RDW was between 12.0 ? 14.3% and the calculated reference interval for reticulocytes was between 38.0 ? 112.8 x109 cells/L. The results showed a significant difference between males and females for the parameter reticulocytes was seen. The difference indicates that different reference ranges should be established for men and women (p<0,0001). No significant difference between males and females were seen for RDW (p=0,74) indicating that the same reference ranges can be used for both men and women. .

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