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21122 Uppsatser om Experimental study - Sida 21 av 1409
Mixture and single-compound toxicity using Daphnia magna : comparisons with estimates of concentration addition and independent action
Aquatic organisms are usually not exposed to single substances but rather to mixtures of toxicants in streams located in agricultural areas. The transport of pesticides used in the agricultural area in Sweden is monitored with continuous environmental supervision every year. During 2002-2008 an average of 10 pesticides were found in each sample and 40% of the samples contained substances with concentrations higher than the Water Quality Standards. Chemical risk management is normally based on single-test evaluations. A problem when assessing mixture toxicities is that the constituents and concentrations of pollutants in the environment vary greatly.
Utvärdering av försvarsspecifika radiovågformer
To be able to evaluate different radio waveforms in a laboratory environment FOI in Linköping has developed an experimental system for radio communication called Rasmus. The system consists of a transmitter, a channel emulator and a receiver. The transmitter modulates a digital signal to a desired analogue waveform. The channel emulator is used to simulate a real radio channel. The channel emulator distorts the signal by splitting it up in several propagation paths.
Prestanda och precision pa? en enkortsdator i ett system med realtidskrav
The report aims to investigate how well a certain type of affordable embedded single board computer can hold up against today's more expensive computers in a computer system by doing various tests on a system with the specified requirements. The system has a Raspberry Pi as the single board computer which task is to control a camera based on coordinates obtained from a server as well as capture and stream a video signal on a network.The researches were conducted to check how much network traffic a single-chip computer sent in different video formats and how much CPU utilization was required. Studies were also made to ensure the accuracy of the camera control. The researches have been experimental, where several tests have been performed and analyzed.The results show that a sufficiently good accuracy can be obtained from the camera steering unit, in which two different servos have been investigated. When the video format MJPEG and H.264 are used, the single-chip computer is able to transmit a video signal up to 1280x720 at 15 fps.
Kentucky Inventory of Mindfulness Skills: validering av den svenska översättningen och en studie av anhöriga till borderlinepatienter.
This paper has two parts. In the first part we analyse the Swedish translation of KIMS and we compare it with the American version that Baer and colleagues developed(Baer et al, 2004). Our focus is the factor structure, internal consistency, scale correlations and validity in relation to the already validated translation of the MAAS. The second part has three issues: Does a group of relatives to persons with borderline personality disorder differ from a group of university employees with respect to different aspects of mindfulness? What are the correlations between KIMS and the symptom measure BSI-GSI for the group of relatives? Has the Family Connections program had any effect on the degree of mindfulness for the group of relatives? 123 university employees answered the KIMS questionnaire.
Möjlig bronsåldersboplats? : en undersökning av platser från bronsåldern på Gotland
There are none known Bronze Age settlement on Gotland, although there are severalexcavation reports that mention that they have found a probable Bronze Age settlement. In the excavation that have been done in the study areas, there are Bronze Age dated hearths, cooking pits and post holes. These study areas have been investigated if they might be possible Bronze Age settlements. This paper discusses about the criteria of settlements and also investigate if the study areas meet those criterias. There are many different criteria for settlement but only the criteria of FMIS are used in the study.
En fallstudie av uppföljningsarbetet hos mark- och trädgårdsanläggningsföretag
This study was made to compare construction companies for gardens way to work with up following, with purpose to see if there was an efficient and not resource demanded system which gave much value.
To achieve the purpose a case study was made. The delimitation for the case study was only to compare the work with up following on individual project. The delimitation on the companies in the study was from ten to sixty employees. That because to reach companies were it´s not the same person how calculates on tenders and than perform the projects. The study was delimitated to the west side of Skåne.
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o be able to compare the companies and to find trends, an interviewguide was made and was used during the interviews with the companies.
Att synliggöra, reflektera och utveckla. En Learning study om bråkräkning i matematik.
AbstractThis study is about describing the pre- internationalization phase and to studycompanies that are in this phase. We are trying to capture characteristics of decisionmakersin the pre- internationalization phase, to then compare the theoretical materialwith empirical material from case companies. Then in the final stages of the thesis, wewant to account for if we managed to answer our research questions. In the method, wegive a description of the approach selected in conjunction with the study. The study isqualitative and we used both primary and secondary data, with a deductive approach.The theory chapter will consider the most relevant theories that are related to the topic,which is internationalization, pre-internationalization, international entrepreneurship,and the psychology behind personalities, attitudes, and how these can affect theorganization's strategic decisions.
En skola för alla? : En skola för elever med autismspektrumtillstånd?En kvalitativ studie som undersöker skolsituationen för elever med autismspektrumtillstånd i en svensk kommun
The overall aim of this case study is to find the conditions for pupils in the nine-year compulsory school with Autism Spectrum Disorder (ASD) who are instructed in the ordinary classroom. The study explores what kind of support the schools offer these pupils. The study also examines the views of the teachers´, special educators´, principals´ and municipal representatives on what kind of support these pupils need and ought to be offered.The methods used were qualitative interviews and a questionnaire study.The theoretical basis of the study is the three different perspectives of special pedagogy. These perspectives represent three different views on the disorders of pupils.The overall result shows that the municipality offers little support for schools. The study shows that there is little collaboration between schools and ASD-specific support outside school.
Evaluering av återvinningseffektiviteten i Svensk Medicin och Google Scholar med medicinska frågor ur Fråga doktorn.
The purpose of this thesis is to evaluate and compare the retrieval effectiveness of two search engines on the Internet: Svensk Medicin and Google Scholar. Svensk Medicin is a medicine-specific search engine and Google Scholar specialises in indexing scholarly material. A set of 20 questions in four categories were used to conduct the searches with the search engines. Genuine medical information needs were selected from a question collection provided by the television program Fråga doktorn. The relevance of the first 10 retrieved documents was judged by using a binary scale and the measure used was precision.
Här kommer fältarna!En studie om fältarbetares betydelse för ungdomarHere comes the street workers! A study about street workers importance for youths
The purpose of this study is to give us a deeper understanding about street workers importance for youths. We also wanted to investigate this from a gender perspective, both considering the street workers but also the youths. The focus for this study is on both the street workers and the youths. The study is based on a qualitative approach. We were going to study people and their behaviors.
Hur personer med smärta av WAD upplever vardagen.
The aim of this study was to describe how persons with Whiplash associated disorder experience how the pain affects them in their daily life. The design of the study was descriptive with qualitative, individual interviews, questionnaire with background facts of the examination group, and diary notes from persons with pain of WAD. Method for selection was convenience. Through contact with the association of whiplash group in a county in middle of Sweden, the majority of the examination group for the study was found. Five persons where given information about the study, one of them choose not to take part of the study, and one of the persons did not complete the study.
Teoretisk och experimentell utvärdering av Lättelement AB:s takinfästning
Lattelement AB in Ornskoldsvik is one of the leading companies in Sweden in composite elements in walls, floors and roofs in particular. The company supplies elements to buildings located with a wide geographical variation, which means that the products are subjected to very different climate with regard to snow, wind and humidity. This places high demands and requires the elements to withstand large variable loads.The elements are made of lightweight beams with flanges of structural timber and beam webs made of OSB. These are bound together by nogging pieces with the same kind of structure. On top of the beams a nailed and glued plywood is added to absorb compressive forces and on the underside of the element a sheet of steel is added for tensile absorption.These elements are then attached to the building framework in different ways depending on the particular element height, loads and the structual supporting material of the frame work.
Att öka värdet på varumärket i tjänsteföretag: en fallstudie
av Källan Hotell Spa Konferens AB
The purpose of this study has been to find out how service companies work to increase the value of their trademark. A case study with personal interviews was chosen as data collection method and as case study object a service company was chosen. The result of the study shows that service companies strategically work with increasing the value of their trademark. To achieve this, agreement between the company product and the image of the trademark is required..
Hur kan learning study utveckla lärarens undervisning? : En studie om hur några lärare arbetar med learning study i sin undervisning
Arbetet är en studie kring hur några lärare i årskurs 4 arbetar med learning study. Flera studier påvisar att teorier och forskning om lärande och undervisning endast når fram till lärarna i begränsad utsträckning. Learning study är en metod för forskning och syftet med denna studie är att undersöka hur några lärares sätt att undervisa förändras efter att man arbetat med learning study i sin undervisning.För att kunna ta reda på hur lärare arbetar med learning study så har lärare från olika skolor intervjuats samt att professor Ference Marton har intervjuats för att ta del av hans kunskaper.Resultatet från intervjuerna är att lärarna i studien idag oftare använder variation och skillnader i sin undervisning samt att lärarna i första hand fokuserar på vad som ska läras..
Omvalet : En studie kring orsaker och påverkande faktorer för elever som gör omval på gymnasiet
The reason why this study has been made is the fact that a substantial part of students in the upper secondary school changes their field of study, during or after their first year. The aim of this study is to find out the reasons behind such changes as well as finding out the affecting factors. The study has been made in two steps, first quantitatively by a poll study and the second step is qualitative by interviews. This research has been made in both private schools and municipal schools, with the ambition to search for differences between these two separate school forms. The study shows that no general differences can be found in a comparison between them.