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4044 Uppsatser om Hypothesis testing and t-test - Sida 17 av 270

Produktutveckling av komfortlösning till lastbilshytt

This report describes a project carried out in cooperation with Klippan Safety AB. The purpose of this project has been to develop a product that facilitates the living area in a truck cabin for the customers. To be able to develop, in a structured way, that kind of product, the project has been based on different product development theories. The project contained of following parts: marketing research, product generation, product evaluation and prototyping. After information from the marketing research and discussions with the company, the decision was made that the task was going to consist an improvement of the existing product referred to as 'the comfort module'.

Det kliniska användandet av Sacroilica-ledstester av sjukgymnaster i primärvården inom landstingen i Sverige: En randomiserad enkätstudie.

Livstidsprevalensen för ländryggsmärta är cirka 80%. Av dessa anses 13% ha sitt ursprung i Sacroiliaca-lederna. Vanliga uppkomstorsaker för SI-ledsproblematik är graviditet, feltramp, fallolyckor, sittande på ena sidan eller halkolyckor. SI-ledstester syftar till att påvisa ökad/minskad ledrörlighet eller provocera smärta. Forskning talar för användandet av smärtprovokationstester, framför allt ?thigh thrust test? och ?compression test? samt användandet av minst 3 positiva tester för diagnostik.

Automatisk trimning av drivsystemreglering från MATLAB

This master thesis covers the development of an automatic tuning process for the existing speed controller for drive systems. The drive systems are resonant two-mass systems where a motor is used to drive a load connected by a shaft. The developed method relies heavily on system identification and the construction of a complete mechanical model of the process. With this approach, the common problem with poor load speed control that derives from measuring only the motor speed can be addressed and solved for a majority of such processes.The automatic tuning method has along with general test functions been implemented in a complete tool for automatic tuning, testing and performance evaluation and reporting for drive systems..

Benämningsförmåga och språkförståelse hos äldre individer : Boston Naming test och Token test i en population 85-åringar

Väl etablerade normativa data för äldre individer är av stor betydelse för att särskilja mellan normalt åldrande och tecken på demenssjukdom. Kortversioner av Boston Naming test och Token test ingår i screeningbatterier och används ofta vid neuropsykologiska undersökningar. Dock är befintliga normativa data för BNT30 och Token test begränsade vad gäller antalet individer över 80 år och inbegriper endast optimalt friska deltagare med hög utbildningsgrad. Denna tvärsnittsstudie inkluderar 213 kognitivt intakta 85-åringar. Syftet var att undersöka resultaten av benämningsförmåga och språkförståelse mätt med kortversioner av Boston Naming test (BNT30) och Token test (deltest V) samt att jämföra resultaten från denna studie med befintliga normativa data för BNT30 och Token test.

Tillgänglighetens frihet : En studie av Vägverkets måltolkning

In this paper I study how the repeal of the Swedish wealth tax (1 of January 2007) has affected people´s labour supply behaviour. This particular issue is relevant because it may help us understand some of the effects of the earnings tax changes that have taken place in Sweden. Accoring to standard economic theory a repealed wealth tax is similar to an income effect for the persons who previously paid the tax. That means that they theoretically will want to consume more leisure, that is decrease their labour supply. The method I am using to test this hypothesis is a difference-in-difference approach where the treatment group consists of persons who previously paid the tax and the control group of comparable persons who did not pay the tax.

Respondentgruppers inställning till IASBs förslag om förbud mot återföring av tidigare nedskriven goodwill

The purpose of this paper is to examine whether there is a difference between the respondent groups preparers and non-preparers position in IASBs question if a reversal of previously impaired goodwill should be prohibited. The background is an exposure draft sent out by the IASB and we examine the answers, in form of comment letters, sent in by the respondents to reach our purpose. Our method is positivistic in the sense that we study already existing theories when we create our hypothesis which gives our assumption about how the result of the respondent?s answers will be. Our data, which we have collected from the comment letters, is qualitative secondary data.

Diesel Dubbelbränsle Teknologi

The work covered in this report includes a literature study of the diesel dual fuel technology(hereinafter referred to as DDF). The literature study covers earlier work that has been doneregarding the use of compressed natural gas (CNG) and diesel in a DDF system. Moreover a onecylinder research diesel engine was fitted with a CNG fuel system for experimental testing. Theinstallation of the engine and the test cell is described. Results from the tests are presentedcovering emissions, heat release and pressure traces from the DDF-concept.During the literature study it was found that most research was related to heavy duty dieselengines.

Design av Digital Multimeter-modul för inbyggt testsystem

The thesis work of 15 credits has been performed to interest of Norrtälje ElektronikPartner AB (NEP) in Norrtälje. The aim of the thesis was to develop a prototype for an integrated digital multimeter, designed for one of NEP's proprietary test systems. A digital multimeter module according to NEP's requirement specification, such as physical size and accuracy should be constructed. The module should be able to measure current, voltage and resistance.The final circuit was based on the chosen analog to digital-converter, Maxim integrated´s Max134, which is the main component of the circuit for this instrument. A circuit diagram and PCB layout were made. The result of this project is a constructed DMM board.

Vem är ett barn? En kritisk idéanalys av Barnkonventionen

Nearly half of the worlds population is individuals under the age of eighteen. The UN Convention on the Rights of the Child state in its first article that a child is ?every human being below the age of 18 years?. Our aim and purpose with this essay is to problemize this broad definition. Our hypothesis is that the definition brought by the UN Convention on the Rights of the Child is too wide and therefore brings difficulties when children of different ages beneath eighteen should and shall be treated the same.

FN:s Milleniemål och deras påverkan på den svenska biståndspolitiken

The purpose of this thesis is to study to what extent the UN millennium development goals have influenced Sweden?s development policy. The research method that I have used is a qualitative text analysis and I have studied the ideas in governmental texts and millennium development goals reports from 1995-2008.My hypothesis is that the basic ideas that has symbolized Sweden?s development policy has not changed much since the adoption of the millennium development goals in year 2000. This hypothesis is based on different ideas that the basic perspectives in international development policy are rather constant.My conclusion is that many of the areas that are affected by the millennium development goals already are prioritized areas within Swedish development policy, for example poverty reduction and gender equality.

Matematiska förkunskaper för kursen Ellära A : En undersökning om ett diagnostiskt test i matematik är ett användbart verktyg för att finna elever som har svårigheter att tillgodogöra sig innehållet i Ellära A

Syftet med mitt arbete var att skapa ett diagnostiskt test i matematik för elever som läser Ellära A på elprogrammet. Detta för att undersöka elevernas förkunskaper i matematik. Undersökningen riktar sig till att hitta de elever som kan få problem att klara matematiken i Ellära A. Testet skulle ej ta en större del av en lektion i anspråk.Med hjälp av kurslitteratur och kursplan för Ellära A har jag tagit fram ingående matematik i kursens inledande delar. Utifrån denna matematik har sedan uppgifter skapats och jämförts med likartade uppgifter i grundskolans nationella prov för årskurs 9 samt skolverkets mål som eleverna skall ha nått i slutet av nionde skolåret.Jag har utfört ett test i en fordonsklass för att kontrollera tidsåtgång och eventuella oklarheter i testet.

Link QualityControl (LQC) i GPRS/EGPRS

This master thesis has been done at Enea Epact AB. The purpose of this thesis is to develop and implement a Link Quality Control algorithm for GPRS/EPGRS in the current testing tool. A Link Quality Control (LQC) shall take quality values from mobile stations and base stations and decide a codingsscheme that opimizes the throughput of data. The Advantage with LQC is that it adapts the used coding scheme to the channel quality. If the channel quality is too bad for the used coding scheme, a slower coding scheme with more redundancy should be selected.

Deklarativt minne hos universitetsstuderande med dyslexi : Undersökning av igenkänningsminne efter oavsiktlig inkodning

Utifrån the procedural deficit hypothesis (PDH) antas det deklarativa minnet vara intakt hos personer med dyslexi. Detta styrks av studier som visat att deklarativt minne är intakt eller förstärkt hos barn med SLI eller dyslexi då det undersökts med icke-språkliga minnestest. Personer med dyslexi som genomgår universitetsstudier antas kompensera för sina svårigheter på olika sätt, bland annat med det deklarativa minnet. I denna studie har deklarativt minne undersökts i form av visuellt igenkänningsminne efter oavsiktlig inkodning. Deltagarna utgjordes av 11 universitetsstuderande med dyslexi samt en kontrollgrupp på 26 universitetsstuderande utan dyslexi.

Identifiering av synkronmaskinsmodell genom SSFR-test

At the Division of Electricity at Uppsala University there is an experimental rig forhydroelectric generators. The experimental rig?s vital part is a 12-pole synchronousmachine, whose electrical characterizing parameters (resistances, inductances andtime constants) are unknown. The aim of this thesis is to characterize the machine inits current state by perform a Standstill Frequency Response (SSFR) test. From theanalysis of the measurement data, which is a part of the test, a set of basic parametershave been received.

Beslutsfattande i säkerhetspolitiska kriser -En studie om press och politisk förändring i den ekonomiska krisens Thailand

This thesis is seeking to explain why policy change come about. This is done by applying a part of Karin Lindgrens dissertation Vad styr ledaren?. The research evolves around the term pressure and the hypothesis are that policy change come about when there is middle range pressure on the decision-maker. Low and high pressure results in no or small policy change.The thesis is done as a case study where the economic crisis in Thailand 1996-1999 makes my case.

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