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735 Uppsatser om Piecewise linear regression - Sida 9 av 49
Besta?mningsfaktorer till regionala bostadspriser : En analys av de svenska la?nen fo?r perioden 1993-2012
Bostadsmarknaden a?r en av de sto?rsta tillga?ngsmarknaderna i ett land varpa? fo?ra?ndringar i bostadspriserna fa?r la?ngt ga?ngna konsekvenser fo?r det enskilda husha?llet, det finansiella systemet och samha?llsekonomin i stort. Flertalet tidigare studier har analyserat den svenska bostadsmarknaden utifra?n ett storstadsperspektiv alternativt ja?mfo?rt Sveriges bostadsmarknad mot andra la?nder. Vi har identifierat att studiet kring vad som besta?mmer prisniva?n pa? regionala bostadsmarknader i Sverige a?r ta?mligen oexploaterat varfo?r avsikten med den ha?r studien a?r att analysera besta?mningsfaktorer till de svenska bostadspriserna pa? la?nsniva?.
Psykosocial arbetsmiljö och besvärsförekomst bland flygplanslastare
The purpose of this study was to describe perceived psychosocial work environment and musculoskeletal complaints among baggage handlers, and to evaluate whether there is any linear relationship between them. The study is a questionnaire based cross-sectional study, and part of an ongoing larger project. Therefore, the number of forms has been limited to those that were collected in the project by 2010-11-25 (N=117). The questions analyzed in the study come from the Copenhagen Psychosocial Questionnaire and ?Nordiska Ministerrådets formulär om besvär i rörelseorganen?, respectively.
Nyckeltal och finansiell kris : En studie av bioteknikbranschen
Tidigare forskning har genom att studera alla tillgängliga företag eller företag medudda branscher exkluderade identifierat vissa nyckeltal som bra indikatorer påfinansiell kris. I denna studie undersöks om dessa nyckeltal även ger ettsamstämmigt resultat för en udda bransch. Med utgångspunkt frånbioteknikbranschen identifieras genom logistisk regression nyckeltalen korta skuldergenom eget kapital och avkastning på investerat kapital som indikatorer på finansiell kris.Avkastning på investerat kapital överensstämmer med tidigare resultat, medan kortaskulder genom eget kapital bör, för denna bransch, tolkas tvärt emot jämfört medtidigare studier..
Betydelse av lövinslag, död ved och variation i träddiameter för artrikedomen hos småfåglar
Forest management contributes to the changes in forest structure by turning heterogenous forests of varied age into homogenous forests of similar age and thus affect bird species depending on different structures or habitats which are lost during forestry. In this report, a study was made to investigate how the amount of decidious trees, dead wood and variation in tree diameter affect bird diversity. The purpose of this study was to be able to give forest management guidelines to increase bird diversity. This study was conducted by investigating 65 transects in forests of different structure south of Linköping, Sweden. Along the 65 transects, birds were inventoried as well as the vegetation.
Statistiska metoder för härledning av indata till säkerhetsanalyser inom kärnkraftsområdet
Objective: In recent years there has been an increasing interest within the clinical (medical) science in measuring people?s health. When estimating quality of life, present practise is to use the EQ-5D questionnaire and an index which weighs the different questions. The question is what happens if the individuals estimate there own health, would it differ from the public preferences? The aim is to make a new prediction model based on the opinion of patients and compare it to the present model based on public preferences.Method: A sample of 362 patients with unstable coronary artery disease from the Frisc II trial, valued their quality of life in the acute phase and after 3, 6 and 12 months.
En empirisk studie av biståndets effekt på u-länders ekonomiska utveckling 1975-1999
The aim of this paper is to analyze aid, grouped into sectors, and its effect on growth in developing countries, to find out which type of aid has had the most positive effect on growth. We compiled a regression analysis based on panel data over 81 developing countries from 1975-1999. In our first regression we considered and group countries by institutional quality, in the other we considered and group countries after regional differences. As a measure on institutional quality we used the KKZ-index. The principal aim of this paper was to find out what kind of aid is the most efficient in its influence on growth in LDC?s.
Hur relaterar det optimala valet av klassificeringsmetod till datamaterialets egenskaper? : En jämförande studie mellan logistisk regression, elastic net och boosting tillämpat på klassificeringsträd.
På sistone har allt mer kritik riktats mot forskning inom klassificering. Trots att forskningen har resulterat i en uppsjö av klassificeringsmetoder finns det de som menar att den har varit ett misslyckande och pekar på det faktum att ingen klassificeringsmetod anses vara systematiskt bättre än den andra eller ens rena gissningar. Detta leder till att valet av klassificeringsmetod i många fall vilar på individuella preferenser snarare än på vetenskaplig grund. Enligt litteraturen bottnar detta faktum i ett underliggande samband mellan det optimala valet av klassificeringsmetod och egenskaperna som karaktäriserar datamaterialet.Uppsatsen tar avstamp från denna problematik och syftar till att undersöka kopplingen mellan det optimala valet av klassificeringsmetod och datamaterialets egenskaper. Denna intention uppnår vi genom att tillämpa logistisk regression, elastic net och boosting tillämpat på klassificeringsträd på sex verkliga datamaterial med varierande statistiska egenskaper.Resultatet visar att den relativa klassificeringsförmågan varierar med datamaterialen.
Internationell Diversifiering - En studie om korrelationsmönster mellan tillväxtmarknader och utvecklade marknader
Purpose: We have three purposes that will answer our problem questions. Our first purpose is to identify how diversification effects for investors changed between emerging markets and developed markets in the period 1996-2010. Our second purpose is to examine the two crises, IT and financial crisis, and if the correlations between these two crises have changed. Our third purpose is to examine to what extent the Swedish stock market was influenced by other markets in the period 1996-2010, the IT and financial crisis.Methodology: The method is based on an analytic model consisting of two tools; Regression- and Correlation analysis. The Regression analysis will be used when investigating if a change in a foreign stock market affects a change on the Swedish stock market.
Modeling Determinants of First-Day Returns from IPOs
The primary purpose of this paper is to find the determinants of first-day returns on the Stockholm Stock Exchange. Our research will cover the 1996 ? 2004 periods. Our secondary purpose is intended to find a profitable trading strategy with regard to future IPOs on the Stockholm Stock Exchange. By using regression analysis, focusing on company specific factors and the IPO process, we hope to find a function exhibiting statistical significance, determining future first-day returns from which construction of a profitable trading strategy will be possible.
Gestaltningsförslag till ny förskola på Zakrisdal
Due to increasing regulations regarding new diesel vehicles particulate matteremissions the new Scania truck, Scania Euro 6, has been equipped with a particulatefilter. This component effectively stores the particles in the exhaust gas but must becleaned in order to prevent itself from clogging. The filter is cleaned through aprocess named regeneration which is a thermodynamic process in which thetemperature of the filter is raised through fuel supplied to the exhaust gas.The purpose of this thesis is to contribute to the development of improved controlstrategies of the temperature during the regeneration process through thedevelopment of model-based controllers. These controllers are designed in order tohave good performance in stationary as well as automatic regeneration.In order to develop these model-based controllers a model of the system isconstructed. The model is described as a linear thermodynamic grey-box model withflow varying parameters, showing good results in validation.The model provides a simulation environment during the controller design, which isfocused around the development of linear regulators with the exhaust gas mass flowas a scheduling variable whose size determines controllers? mode of operation.
Likvida tillgångars påverkan på lönsamhet och aktievärde : En studie av svenska företag på Nasdaq OMX Nordic Stockholm mellan 2008-2011
Objective: The study will investigate whether cash liquidity have a negative affect on profitability and share value of companies, listed on Nasdaq OMX Stockholm 2008-2011. Part of the purpose is also to show if the industry risk is of importance for treasury management of these companies.Method: The methodology for the study is key analysis through hypothesis testing and regression analysisConclusion: The liquidity ratio affects profitability in a negative direction on the entire sample. No other conclusion can be drawn..
Tänka utanför boxen : Målkort och löneboxar som motivationsfaktorer
Titel: Thinking outside the box: Goals and Salary boxes as motivational factorsAuthors: Anna Ceder and Karin Barwinger PlogareSeat of Learning: Uppsala UniversityPurpose: The purpose of this study was to investigate if the imposition of salary boxes in Uppsala municipality has had any influence on the organisation?s employees? to improve their work motivation. The reason for the study was to look deeper into employees? motivational factors, this with a focus on salary as motivational factor in structures of salary boxes where it is possible for the employee to work towards goals which affect their salary. The primary purpose of the study was to look into if employees? ability to advance their performance had any connection to the impostion of salary boxes.Methodology: In order to collect as much data as possible for the measurements one of the largest occupational groups in Uppsala municipality was chosen, which represents the group of pre-school teachers.
Support Vector Machines for Classification applied to Facial Expression Analysis and Remote Sensing
The subject of this thesis is the application of Support Vector Machines on two totally different applications, facial expressions recognition and remote sensing.The basic idea of kernel algorithms is to transpose input data in a higher dimensional space, the feature space, in which linear operations on the data can be processed more easily. These operations in the feature space can be expressed in terms of input data thanks to the kernel functions. Support Vector Machines is a classifier using this kernel method by computing, in the feature space and on basis of examples of the different classes, hyperplanes that separate the classes. The hyperplanes in the feature space correspond to non linear surfaces in the input space.Concerning facial expressions, the aim is to train and test a classifier able to recognise, on basis of some pictures of faces, which emotion (among these six ones: anger, disgust, fear, joy, sad, and surprise) that is expressed by the person in the picture. In this application, each picture has to be seen has a point in an N-dimensional space where N is the number of pixels in the image.The second application is the detection of camouflage nets hidden in vegetation using a hyperspectral image taken by an aircraft.
Samband mellan luftföroreningar och klimatfaktorer - en statistisk unersökning
That air pollutants of different kind has impact on our climate can hardly haveavoided anyone during the past years environment explosion in the media. But howis it actually with the reverse, i. e. the climate's impact on air pollutants? The aimwith our degree thesis is to try to find out if different weather factors, statisticallyseen, promotes atmospheric pollutants and particles in the air and vice versa.We got access to data on air pollutants and weather factors that was registeredduring year 2007 at Femmanhusets air pollutant and weather station in Gothenburg.In order to do a statistical investigation of these data, and to be able to analyze if itoccurs relations of various kind, we used the statistics program SPSS.
Faktorstruktur utifrån "frågor kring attraktivt arbete"
År 2007 är det högkonjunktur och arbetslösheten sjunker i Sverige. Fler väljer att läsa vidare på högskola och universitet och färre människor föds. En attraktiv arbetsplats vinner konkurrensen om den kompetens som finns. Arbetslivsinstitutet startade därför, tillsammans med Högskolan Dalarna, ett gemensamt forskningsprojekt 2001 som avslutades 2003. Projektet resulterade bla.