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1362 Uppsatser om Simple linear regression - Sida 4 av 91

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.

Den svenska skogsindustrins beroende av makroprisvariabler

En analys av vilka makrovariabler som har störst påverkan på den svenska skogsindustrins lönsamhet. Fem företag och ett antal makroprisvariabler mätna under en tio-års period. Teoretiskt ramverk är MUST-analysen, multipel regression har använts för att gradera variablers relevans..

Utvärdering av den svenska cykelhjälmslagen för barn under 15 år : Analys av nationella trender i cykelrelaterade huvudskador mellan 1998-2011

Introduction: In January 2005, a nationwide mandatory bicycle helmet law for children under the age of 15 was introduced in Sweden. In the current study, the effect of this law was evaluated by analyzing national trends in hospital admissions due to bicycle-related head injuries during the period 1998-2011.Methods: An interrupted time-series design with segmented regression analysis was used to evaluate the intervention effect on head injuries as a percentage of all injuries (%HI) among cyclists in age- and sex-specific groups. Effect was measured as a change in level and/or slope of the trend at the time of legislation.Results: A total of 35261 cyclists (0-54 years) were hospitalized due to a bicycle injury during the study period. Linear regression analyses of the entire study period (not segmented) showed significant year-to-year decreases in the %HI of 1.3-1.7% in all age and sex-specific groups (p < .0001). Results from the segmented regression analysis showed that, at the time of legislation, a significant drop in level occurred among males under 15 years (-4.5% [95% CI: -7.7% to -1.3%], p = .01) and a significant change in slope occurred among females aged 30-54 years (-1.6% [95% CI: -2.9% to -0.2%], p = .025).Conclusions: The law seems to have had an effect on males in the target population (<15 years).

Utveckling och utvördering av statistiska metoder för att öka träffsäkerheten hos lokala vindprognoser

Wind is used as an energy source all over the world. To be able to use this effectively, there is a need for as good forecasts and forecast models as possible. One of these models is Coupled Ocean/Atmosphere Mesoscale Prediction System (COAMPS®) that is used to calculate short time forecasts. This model is used here to calculate wind speeds at two different areas in Västra Götaland, Bengtsfors and Vänersborg. There are also wind measurements with SODAR stations for these areas.

Enkla kemiska processer inom förskolan : En kvalitativ intervjustudie om förskollärares uppfattningar och tankar om läroplansmålet enkla kemiska processer

The aim of this study was to investigate preschool teacher?s perceptions about the curriculum goal concerning simple chemical processes. The result was based on narratives received by a qualitative study and semi-structured interviews of six preschool teachers. The results of the study showed that preschool teachers perceive that they actually are working in a relatively small scale with simple chemical processes and they do not really know what simple chemical processes are, and do not feel very familiar with the subject. Water, dough, mud, paint and baking were the most common activities that were used when working towards the curricular goal. However, it was never explained to the children that it was simple chemical processes they were working with during the activities, neither was it discussed among colleagues because of the uncertainty about the concept.

Kopplingsbeslag för resårbottnar

The project has been implemented in collaboration with Carl-Johan Lundberg on Deltagruppen Ltd in Jönköping. Problem introduction comes from Carl-Johan's own experience from the hotel sector. The problem that all hotels has is that they sell two products, i e. simple - and double rooms. Persons that travel in companies do not desire always to share bed.Focus in the work is to develop a product that holds together two simple beds and forms double bed, concurrent that it goes that converters to two simple bed without needing to disassemble the product and be done invisible.

Kreditklassning av aktiebolag i Sverige, en logistisk regression

Predicting corporate failure is an increasingly important topic in the world of economics today. This paper, with the help of the credit ranking company Syna AB, aims to investigate a few different statistic strategies to do just that. This task is accomplished by using a data material of 250 000 Swedish companies divided into two subsamples. The first sample is used to develop the model and the second as a validation sample. The model developing sample holds 160 000 companies divided into five different subgroups based on size and age.

Sensorsystem till hinderhanterande robot

The projects goal is to construct and program a robot that is controlled from a computer but also have an obstacle handling function that allows the robot to navigate around the object by itself.The robot is a simple construction and the number of components and functions is kept at a minimum. A tricycle construction was chosen because it?s the simplest. Communication between the robot and the computer also kept as simple as possible..

Återköp av aktier på den svenska marknaden : Hur påverkar utestående optioner sannolikheten för aktieåterköp?

I mars år 2000 blev det tillåtet för börsnoterade bolag att genomföra återköp av egna aktier i Sverige. En del kritiker hävdar att återköp kan användas till att påverka aktiekursen positivt, till förmån för bland annat optionsinnehavare. I denna uppsats har vi undersökt om antal utestående optioner till anställda ökar sannolikheten för genomförandet av aktieåterköp. För att ta reda på detta har vi undersökt data från samtliga bolag som var noterade på NASDAQ OMX Large Cap i Stockholm vid utgången av år 2007. Vi har analyserat datamaterialet med hjälp av enkel linjär regression samt logistisk regression.

VEM ST?DJER BIST?NDET? En kvantitativ studie om vilka faktorer som p?verkar attityden gentemot EU:s internationella bist?nd

The discussion regarding international aid tends to be highly debated for long periods of time. Some individuals are very positive towards aid and some individuals are less positive towards aid. This study aims to broaden the understanding of the aspects behind that. The previous research tends to focus on aid allocation within the EU, or which macro factors could influence which donor countries give to which recipient countries. This study aims to add to the research with which aspects at the individual level can influence the individual's attitude towards international aid from the EU.

Vilka faktorer påverkar företags kassahållning?: En studie av svenska börsbolag 1999 - 2009

This paper investigates the determinants of corporate cash holdings for a broad sample of Swedish non-financial firms in the 1999 - 2009 period. Using a fixed effect regression model, we find that firms with riskier cash flow hold relatively high ratios of cash to total assets. This is in line with both the precautionary motive and agency motive for cash holdings. Net working capital is found to be negatively related to corporate cash holdings. A result commonly interpreted as support for a negative substitution effect between net working capital and cash.

Utveckling av Lillmyrans hemsida

Föräldrakooperativet Lillmyran är en förskola som ligger i Gävle och de har en hemsida som behöver utvecklas. Förskolan ville ha hjälp med att först kartlägga vilka förväntningar medlemmarna hade på deras hemsida. Därefter skulle det undersökas om deras plattform för webbpublicering, CMS Made Simple, hade de tekniska förutsättningar som krävdes för att förverkliga deras önskemål. Till sist skulle även hemsidan utvecklas med tanke på de villkoren. Kartläggningen av förväntningarna på hemsidan skedde med hjälp av en enkätundersökning och systemet skapades med hjälp av CMS Made Simple.

Skuldlättnader som vapen i kampen mot korruption? : Om hur HIPC-initiativet påverkar korruptionsgraden i berörda länder

This paper examines how debt cancellation, given under the HIPC-initiative, has affected corruption over the period 2000-2006. The examination is foremost interesting due to earlier research showing that high corruption leads to unequal distribution of economic resources. This, combined with the objective of the HIPC initiative to reduce poverty, indicates that combating corruption must be successful in order to fulfill the goals of the initiative. A linear regression shows that countries that have benefited from the HIPC-initiative indeed have a lower corruption than other countries. A panel-data analysis shows on the other hand that no effect on corruption due to debt cancellation or reforms undertaken in the program can be confirmed..

Demografisk sammansättning samt beteende hos medlemmar i panel

The use of marketing research panels are a more and more frequently used source of information for studies within many different branches. The purpose of this report is to investigate the demographic composition of panels and compare it with the population of Sweden, a possible change in behaviour of respondents, and if the source of recruitment is the cause of possible differences in study results. The study was commissioned by Norstats Linkoping office. Sources for the data material include Norstat?s recruitment process and their two main panels with different recruitment sources.

Motsvarigheter i svenskan till franskans futur simple. Uttryck för framtid i ett ekvivalensperspektiv utifrån ett antal originalromaner och deras översättningar

I denna uppsats undersöks vilka uttryck för framtid i svenskan som svarar mot fransktfuturum i form av futur simple. Undersökningen utgår från åtta originalromaner med franska respektive svenska som källspråk samt deras översättningar, hämtade ur enparallellkorpus.Alla förekomster av futur simple i materialet har identifierats och kategoriserats iförhållande till deras svenska motsvarigheter. De viktigaste motsvarigheterna är svensktfuturum i form av konstruktionerna kommer att + infinitiv respektive ska/skall +infinitiv, presens samt konstruktioner med modala hjälpverb. Exempel på de olikamotsvarigheterna analyseras utifrån ett ekvivalensperspektiv där de vanligastebetydelserna för varje motsvarighet diskuteras i förhållande till de olika möjligabetydelser som futur simple kan omfatta. Betydelserna ses utifrån begreppen tempusoch modalitet.De svenska motsvarigheterna kan var för sig rent generellt sägas endast motsvaradelar av det betydelsefält som futur simple svarar mot, och en frågeställning gällerhuruvida översättaren kan sägas ha kompenserat för detta.

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