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455 Uppsatser om Parameter estimation - Sida 15 av 31

Glidytor och ytjämnhet med avseende på friktion och tätning

Gliding and sealing functions in Öhlins shock absorbing systems sets great demands onthe contacting surfaces. In this particular case, the bushings and the sealings on acylinder piston. The surface wanted is a surface with both low frictional forces and smallleakage. This study was done with the goals of investigating and determining existingsurfaces due to the frictional force and leakage. How can we in an easy mannerdescribe these?A number of ten front forks were part of a main study.

Matting of Natural Image Sequences using Bayesian Statistics

The problem of separating a non-rectangular foreground image from a background image is a classical problem in image processing and analysis, known as matting or keying. A common example is a film frame where an actor is extracted from the background to later be placed on a different background. Compositing of these objects against a new background is one of the most common operations in the creation of visual effects. When the original background is of non-constant color the matting becomes an under determined problem, for which a unique solution cannot be found. This thesis describes a framework for computing mattes from images with backgrounds of non-constant color, using Bayesian statistics.

Skallet från forntiden : en osteologisk analys av hundben från stenålderslokalerna Hemmor och Gullrum på Gotland samt en teoretisk studie av hundens rituella och funktionella roll under neolitikum

The bark from prehistory ? an osteological analysis on dog bones from the Stone Age settlements of Hemmor and Gullrum at Gotland and a theoretic study of the secular and sacred roles of the dog during the Neolithic.Dog bones from two Pitted Ware Culture (around 2500 BC) settlements, Hemmor in När parish and Gullrum in Näs parish/Havdhem parish, at southern Gotland, Sweden are analyzed. The analysis contains a study of age, withers height and size estimation as well as skeletal changes and pathologies. The attempt of the analysis is to highlight the secular and sacred role of the dog during the Neolithic at Gotland. The dog bones were collected during excavations in the years 1890 and 1903 and were found across the entire surfaces of the settlements.Although there were no specific dog breeds during the Stone Age, the dogs at Hemmor and Gullrum show a wide range of size (withers height spans from 39,74 cm to 56,47 cm) and may therefore have been used for different purposes depending on their size.

MCNP-modell för beräkning av neutrondos och DPA på reaktortanken vid Ringhals 2

In this report an MCNP (Monte Carlo N-Particle) model is described for the reactor vessel at Ringhals 2. The model is validated against the specific activity in neutron dosimeters, extracted in 1977, 1984 and 1994. The validation showed that the calculations of the model are within the requirements of a maximum of 20 percent uncertainty for every neutron dosimeter except one, extracted after the first cycle. The uncertainty of this cycle was mostly due to the operation data rather than to the MCNP model.The model has been used to investigate various questions concerning radiation damage. The reliability of the traditional measure of radiation damage, fast neutron flux (En > 1MeV) has been evaluated.  This has been done by taking the ratio for this and another measure of radiation damage, DPA (Displacement Per Atom), for various positions and layers.

Den svettiga sanningen : Bedömning och betygssättning i ämnet idrott och hälsa

Aim and questionsThe purpose for this study was to investigate how marks and mark settings are formed in physical training at some compulsory schools. We also wanted to see how the criteria for marks are formed. These were the main questions during this study.? How do the students find the evaluation and the making in physical training?? Are there differences between different student groups when it comes to their experience around estimation and marking in physical training? (gender, marks, schools etc.)? How do the teachers motivate their marking in physical training?? Are there any differences between the criteria for marking between different schools?MethodThe study was carried out during the spring 2005 at eight schools in a municipality in the middle of Sweden. The study involved 339 students opinion polls and 12 teacher opinion polls.

Effekt av psykodynamisk psykoterapi : - Analys av symptomförändringar från terapistart till avslutning.

Inledning: Syftet med denna studie är att, utifrån ett insamlat material vid S:t Lukas mottagningar i Stockholmsområdet, undersöka symptomförändring från start till avslutning i psykodynamiskt inriktade psykoterapier.Frågeställningar: Den övergripande frågeställningen är om patienter och terapeuter bedömer att terapierna haft någon effekt och i så fall vilken. Vidare om bakgrundsfaktorer och självbild påverkat symptombelastningen.Metod: Studien har genomförts med hjälp av självskattningsformulär som fyllts i före och efter behandling. Patienterna har fyllt i Symptom Checklist (SCL-90) och terapeuterna ett frågeformulär där de skattat patienternas besvär. Efter inomgruppsjämförelser har jämförelser gjorts med ett normerings-material.Resultat: Det sker en signifikant symptomlindring under terapierna. Störst är förändringen när det gäller depression, ångest och interpersonell sensitivitet samt i det sammantagna genomsnittsvärdet.

Vindfällning i naturliga och skapade bryn och kanter :

The aim of this work was to study if the edge of the forest is more resistant to heavy winds than the trees located further in from the edge, and how this edge effect changes between different types of tree species and site types. The data was collected from an electric power line going from the north to the south of Sweden. The mean value of the clearcutted area around the power line was 120 meters. The main direction of the storm in January 2005 was west-southwest and thus the power line was a perfect place for gathering a large data set. The main parameter studied was the damage frequency at the edge of the forest compared to the trees located further in from the edge (up to 100 m from the power line). Tree species mixture, soil moisture class, soil type, topography, stand height, stand height of the stand on the other side of the power line and wind exposition was estimated. The results showed a distinct edge effect. The edge of the forest had clearly lower damage frequency for all tree species. A marked difference was observed between tree species and damage frequency.

Likhet och särart - en studie av Internationella biblioteket och dess besökare ur ett mångfaldsperspektiv

The underlying purpose of this study is to see whether a library focused solely on providing literature in other languages than Swedish serves as a unifying, integrating force, or as an agent for division and exclusion. The study focuses on the International Library in Stockholm. The authors have created a profile of the visitors of the selected library, concerning their characteristics, their library habits and their perceptions of the International library. This profile has then been compared with the staff?s perception of the visitors as a group.

Ekonomiska konsekvenser för skogsbruket vid avsättning av mark för viltvårds- och jaktändamål : en fallstudie på Svenska Jägareförbundets fastighet Öster Malma

The value of game for hunting from a social economic viewpoint is an interesting topic that is currently being investigated in a Swedish research program. The amount of damages that the game stocks cause to the forestry is, and has been in focus for a longer period of time. Something that I saw as missing was an investigation of how much an active game keeping measure might cost in lost incomes for forestry in terms of reduced acreage for forest production. This question was the foundation for this investigation, which purpose is to give interested persons with decent knowledge of forestry an example of how cost estimation for forestry resembling the example that is studied can look like. The measures that has been taken is a felling of forest in different ages on both sides of a forest dirt road to create increased asset of forage for the game, and at the same time give hunters that have their post along the dirt road a better chance of seeing passing animals early and increasing the possibility to shoot good shots. The area, which is a part of The Swedish Association for Hunting and Wildlife Management estate Öster Malma, is also used as an example for guests who wish to learn more about managing ungulates. These guests have now got the opportunity to get information on how big the costs are for the measures that have been taken. The main conclusions of this work is that changed timber prices and foremost a change of interest rate makes big differences on the result of the calculations.

Revisionsberättelsens betydelse vid kreditgivning

Banker är enligt lag tvungna att göra en bedömning av företags återbetalningsförmåga vid kreditgivning. Redovisningsinformation är en viktig bedömningsgrund vid kreditgivning och kvalitén på informationen är avgörande för beslut gällande utlåning. Det är revisorns uppgift att genom granskning kvalitetssäkra ett företags redovisning och förvaltning och resultatet av detta lämnas i en revisionsberättelse. Revisionsberättelsen är den enda offentliga rapport som revisorn lämnar och därmed den som intressenterna kan ta del av. Syftet med denna studie är att undersöka vilken betydelse revisionsberättelsen har för bankerna vid kreditgivning till företag.

Översättning och validering av pVHI : för barn 6 till 10 år

Studies indicate that between 6-9% of all children has some type of voice problems. Voice problems in children may have different etiology and can affect all ages. In Sweden, there is a lack of a standardized questionnaire addressed to children with voice problems and their legal guardians. The purpose of this study was to translate and validate the Pediatric Voice Handicap Index (pVHI) in Swedish children aged 6 to 10 years. The study was carried out through an internet-based assessment form for children referred to speech and language pathologist/ phoniatrican due to voice disorders in Sweden and a matched control group of children without voice problems.

Ledarskap och det Nätverksbaserade försvaret - hur skapas tillit inom de behovssammansatta förbanden i NBF?

Ett av målen inom det nätverksbaserade försvaret, NBF, är skapandet avbehovssammansatta förband, det vill säga möjligheten att snabbt kunna kombinera olikaresurser inför en specifik uppgift. Tillit inom dessa förband framstår här som en mycketviktig parameter för att de ska kunna agera gemensamt mot uppställda mål.Denna uppsats genomförs som en kvalitativ undersökning och dess syfte är att, genomintervjuer med officerare ur Armén och Helikopterflottiljen, söka svar på hur man skakunna skapa tillit inom dessa behovssammansatta förband. Empirin från genomfördaintervjuer har prövats mot de ledarskapsteorier som idag används inom den svenskaFörsvarsmakten, samt mot en utvald del av den svenska teorimängd som idag finns atttillgå om nätverksbaserat försvar.Resultatet visar hur viktigt det är att Försvarsmakten snarast börjar öva i NBF-miljöer, trotsatt materiel och metoder inte är färdigdefinierade. Dessutom påvisas att det idag inte finnsen tillräckligt klar definition inom den svenska Försvarsmakten av vad begreppetbehovssammansatta förband innebär och att denna snarast bör skapas. Därutöver visas atttillit inom behovssammansatta förband både består av förtroende för utsedda chefer, samttillit mellan ingående förband.

Employer branding : En studie i hur Uppsala Universitet bygger sitt arbetsgivarvarumärke

Purpose: Our purpose is to achieve a higher understanding of which factors University of Uppsala is using to attract and keep their existing workers.Theory: We have worked with Barrow & Mosley's the employer brand mix, this modelexplains 12 important factors that exists within the employer branding process. External reputation, internal communication, the board, values and corporate social responsibility, internalmeasuring systems, service support, work environment, rewards and acknowledgements, learningand development, performance estimation, team management and recruitment and introduction.Method: To achieve an understanding of our subject we have chosen to work with a qualitativemethod. This type of method is more considerate of the interviewed person?s way of seeingthings and also accounts for how the person answers. To answer our problem statement we haveconducted a case study on University of Uppsala where we used semi structured interviewsbecause we wanted to limit the risk of leading questions.Empirical findings: University of Uppsala were used as material for our empirical discussionContext: The main reasons that workers is attracted to and are staying at the university dependson the external status they achieve when working there, this combined with that the workers getsto be a part of the university's brand.

Clear-cut and substrate characteristics important for the occurrence of the beetle Upis ceramboides

Disturbances, such as fire and wind, are important for saproxylic beetles (= beetles depending on decaying wood) to gain substrate in boreal forests. Clear-cutting is an example of a man-made disturbance. Measures such as prescribed burning have been made to resemble natural disturbances. The aim of this study was to see which clear-cut characteristics are important for the occurrence of the saproxylic beetle Upis ceramboides. This is a species favored by open habitats and is said to respond positively to forest fires. The distribution area in Sweden for this species has decreased during the last two centuries and I wanted to see if there were differences between clear-cuts in Hälsingland, where it is very rare and decreasing, and Norrbotten where this study was conducted.

Grundvattenpåverkan kring järnvägstunnlar i berg

Rock groundwater has always caused major problems when tunnelling. Water leaking into tunnels can cause large problems, not only on the construction itself but also on the environment. A continuous water leakage can lead to a declining water supply, and geotechnical problems can occur as subsidence in the ground. Therefore it is of great importance to predict the consequences that can appear in the surroundings due to a declining groundwater surface.The aim of the study was to investigate different methods for predicting leakage and changes in groundwater level due to tunnelling excavations in rock. This thesis was performed by comparing mathematical methods, actual groundwater changes and results from preliminary investigations.Investigations were made for three railway tunnels planned by Botniabanan AB.

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