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1328 Uppsatser om Laboratory materials - Sida 41 av 89

Det ideala läromedlet i musik - digitalt? : En studie om läromedel i musik för högstadiet

Studiens syfte är att studera musiklärares syn på högstadiets läromedel i musikämnet; läromedlens fördelar och nackdelar samt vad som anses vara ett ?idealt? läromedel. Studiens teoretiska utgångspunkter utgörs av ett didaktiskt perspektiv. Resultatet baseras på en enkätundersökning av 27 musiklärare från hela landet med olika bakgrunder och yrkeserfarenheter. Studiens resultat visar att de tillfrågade musiklärarna anser att de färdiga eller tryckta läromedel de känner till är otillräckliga och blir snabbt föråldrade.

Utvärdering av ett system för Rapid Control Prototyping inom området robotstyrning

In this report a system for Rapid Control Prototyping, RCP, is evaluated through animplementation of the motor control methods Field Oriented Control, FOC, and Space VectorPulse Width Modulation, SVPWM. The evaluation emphasizes on time-consumption andresource utilization on the used hardware and on usability for of software.A new mechatronic laboratory is under development at ABB Corporate Research in Västerås. Itwill be used for both mechanical and motion control design using existing and new hardware.The control structure in a traditional robot system will be interfaced to a rapid prototypingsystem which should allow easy changes to algorithms at different levels in the system.The system designated for this project comes from National Instruments and constitutesLabVIEW Real-time and FPGA module as the software tools. The hardware is a NI Single-Board RIO (Reconfigurable Input Output), sbRIO, development board including a Field-Programmable Gate Array, FPGA, from Xilinx and a microprocessor from FreescaleSemiconductor. Graphical programming is performed in the LabVIEW environment, andthrough Xilinx tools the LabVIEW FPGA code is compiled to VHDL code.A pre-study was carried out to clarify the concept of RCP and investigate different systems forRCP and their traits.

Nedskrivningsprövning av goodwill : Tillvägagångssätt och problematik

Graphic profiles are a part of companies? brand expressions. The graphical values reflect the brand values the business wants to convey. They consist of different graphic elements such as logo, company sign, colour schemes, templates, rules, fonts, pictograms, formats and references to how different graphic elements should look, for example, business cards, signs and materials for websites. This thesis aims to examine why firms choose to replace their graphic profiles by studying their underlying motivations.

Trombocyträkning hos katt : en ny metod

Platelet aggregation is a major and common problem in blood samples from cats. This greatly affects the accuracy of counting of the platelets. Because of the difficulties in counting feline platelets, results for patients and reliable reference values for cat platelets are currently so inaccurate as to be almost useless in diagnosis of thrombocytopenia. In this study we used an effective method to prevent platelet aggregation. Blood was collected in CTAD test tubes and prostaglandin E1 was added to the blood sample.

Lättläst eller inte? : En läromedelsanalys av lättlästa läroböcker, inom ämnet svenska, anpassade för elever med läs- och skrivsvårigheter

The demands on the adult literacy-rate are very high in Sweden. People with reading and writing difficulties may find it hard to fit into the community and to succeed in school. To accommodate the needs of students with learning disabilities, Swedish schools provide easy-to-understand materials. The purpose of my thesis is to examine how easy-to-read textbooks for high school students are different from regular textbooks. The study was carried out using a content analysis and I examined the books according to criteria specified by the Swedish author Torbjörn Lundgren.

Varför granskar ni mig? : En kvalitativ studie om användningen av Facebook i rekryteringprocessen.

This study focuses on the motives that recruiters can or may have within companies, organizations and authorities of using Facebook as a complement in the investigation of potential work-candidates. The study also explores the consequences that could occur regarding the boundaries of private and public spheres when recruiters are researching Facebook-pages of potential work-candidates.The results were collected by qualitative interviews with eight different recruiters from a wide range of businesses in Kalmar.By applying a framework of already identified uses and gratifications, we discovered six different motives of why recuriters would use Facebook as a complement while recruiting work-candidates. The motives are; security, guidance and advice, convenience utility, surveillance, curiosity and economic motives. We also discovered that the following consequences of researching Facebook-pages of potential workcandidates are that candidates are restricted in the possibilities of acting private on their Facebook-pages and that candidates have zero control of their published materials since recruiters sets the limits of what can be thought of as private and as public..

Metanpotential för alger och bioslam blandat med pappersfiber

In this thesis the methane gas potential of three different substrates, two algaes Saccharina latissima and Laminaria digitata and biosludge mixed with paper fiber was studied. This was done by batch experiments in a laboratory environment to examine the gas production and composition of the produced gas.Biogas production is a complex anaerobic digestion process in which various microorganisms decompose the substrate in steps and at the end produce biogas and a residue. Many factors affect the production of gas, for example the substrate content, temperature and pH in the digester.The analysis of methane potential were divided into two experiments. In experiment 1 substrates were digested along with inoculum from Växjö waste water treatment plant in a temperature of about 37 ?C.

Metallersättning inom byggbranschen

In this paper the possibilities to replace metal with plastic in products for the building industry were looked into. The first part was a market examination where several suitable products were found. After evaluation the door latch for in-house doors was selected to be re-designed to better suit the properties of plastic.New types of mechanisms were designed with different functions that use the benefits of plastic materials. Models of these mechanisms were developed to evaluate their function. The components in the different mechanisms were adapted for manufacturing with injection moulding.To confirm that the plastic material could handle the appearing stresses calculations on the most vulnerable parts were carried out.

Villa T - Konsten att rita åt sig själv

Som arkitekt, byggherre och brukare i en och samma person ges unika möjligheter att styra hela processen från första skiss till färdig byggnad och därigenom förverkliga ett högst personligt bud på vad ett samtida hus kan vara.Mitt examensarbete är en betraktelse av den delvis äventyrliga resan att rita och låta uppföra ett enfamiljshus i vilket man sedan flyttar in. Följande begrepp behandlas:Platsen och dess förutsättningar ur historiskt och fysiskt perspektiv.Programskrivandet; med utgångspunkt i vardagslivet nu och i drömmar om en tänkt framtid. Det unika vägt mot det generella mot bakgrund av bristen på tidigare erfarenheter av villaliv. Funktioner samt Inre och yttre rumssamband beskrivs.Gestaltning av byggnaden; dels som en tredimensionell konsekvens av programmet, dels genom konceptuella val, samt ett stort intresse för materials egenfärg och genomarbetade detaljer. En undersökning av gränssnittet mellan tradition och modernism.Upphandling, tid och ekonomi ? en översiktlig redogörelse för hur dessa frågor balanserats.Materialet består av text ritningar och fotografier..

Viktstudie av Analysinstrument : Konceptförslag för minskning av vikt

This thesis report describes the development of concepts regarding how weight can be reduced to the analytical instrument Biacore 4000. This thesis has resulted in five different concept proposals, all of which is solutions to reduce the instrument's weight.The thesis started with a pre-study where the instrument's structure and function were studied using both Solid Works, the opportunity to study the instrument in real life were also possible done. During this phase, a weight study was conducted as well, in which the instrument's weight distribution was studied and mapped.Following the initial phase, the work proceeded by developing concrete concepts to reduce the weight of the instrument where focus mainly was on the two cabinets. In addition, another two concepts were revealed, both with a more general approach.At the final phase of the thesis, the concepts were compiled and evaluated among themselves and the initial instrument.The thesis resulted in a study of the instrument's structure and weight distribution, with suggestions on how weight may be reduced for the instrument.The result factors such as materials, and manufacturing were aspects that were taken into consideration.At the final section of the report, suggestions for further work in which different aspects are discussed can be found..

Phosphorus in agricultural soils around the Baltic Sea : comparisons of different laboratory methods as indices for phosphorus leaching to waters

Eutrophication of the Baltic Sea is a serious problem. A major contributing factor is diffuse losses of phosphorus (P) from agricultural land in surrounding countries. In order to estimate P losses, environmental monitoring of small agriculture-dominated catchments is being carried out in most of these countries. Evaluation of the risk of P leaching to waters is usually based on chemical tests originally developed to quantify the amount of soil P available for plant production. The tests are performed in different ways in the different countries and a number of different extraction agents are in use.

FEM i praktiken : En studie i FEM-Designs användningsområden inom konstruktionsprojektering

This diploma work has been conducted for the consulting company Ramböll inUppsala, Sweden with the purpose to perform a study with the calculation programFEM Design 9.0 made by Strusoft. The aim has been to find out if it is possible to gainadvantage by utilizing more advanced 3D software for design calculations, instead ofthe traditional methods currently used in construction works.The method of approach has been to model an existing warehouse building with theprogram FEM Design, and then compare the results with those attained with FrameAnalysis and hand calculations. These results are then analyzed. An evaluation is maderegarding to what benefits can be achieved using a more advanced 3D-model.The results of the study show that the differences between the methods are not ofany significance with regard to the design of the steel frame. However in morecomplex materials such as reinforced concrete, the differences become more notable.The conclusions drawn by the authors of this study into FEM Design are that theeducation requirements of the program are higher than for simpler programs, whosepurpose are solving predetermined problems.

Analys av off-design prestanda för ett absorptionskylsystem

This master thesis project at KTH is performed in the Mechanical and Aerospace Engineeringdepartment at University of Florida (UF). The thesis is a small part of a gas turbine researchproject where a vapour absorption refrigeration system (VARS) and a high pressure regenerativeturbine engine (HPRTE) are integrated together. The main objective is to build a computermodel of the VARS. The computer model is supposed to be used to analyse the off-designperformance of the VARS and should also be easy to integrate as a subroutine in a more complexsystem model. To model the VARS some knowledge of the absorbent/refrigerant mixture had tobe well known, in this case a mixture of ammonia and water.

Utvecklingen av samverkansregler mellan hälso- och sjukvården och näringslivet : Samverkan och krishantering i fält av legitimitet

Collaboration is a form of organization on the rise in Sweden. For health care, it is ofinterest to collaborate with industry to ensure that needs for specialist education andtraining are met and that products developed meet the relevant requirements.Conversely, industry actors have an interest to have a close collaboration with healthcare in order to gain insight into customer needs, provide information about theirproducts and to test products in development.The starting point of this study is an agreement and regulatory framework for formsof collaboration between public health care in Sweden in general and thepharmaceutical industry, the medical device industry and the laboratory technologyindustry. The research questions concerns how this agreement has evolved and theprocess surrounding its emergence may contribute to knowledge about collaborationas a form of organization and the relationship to concepts such as legitimacy,corruption and institutional theory.By tracking the emergence of the current regulatory framework genealogicalthroughout history, the study uncovers how the agreements have played a role in andcontributed to the legitimization and institutionalization of collaboration practices andhow crises have changed the shape of the practices. A theoretical treatment ofrelevant concepts such as legitimacy, institutionalization of practices, corruption andstigmatization of organizations form the basis for an interpretation and analysis of theprocess.The conclusions of the examination of the historical process that led to the currentagreements contribute to empirical knowledge of how crises and stigma affect thelegitimacy of collaboration practices and how the repair of legitimacy can be donesuccessfully after a crisis. The treatment of the empirical material is also a historicalsource for the development of ethics agreements between public health care andpharmaceutical industry and the medical industry in Sweden..

BIG SISTER IS WATCHING? En argumentationsanalys av den svenska debatten om ?Chat Control?

The Swedish debate regarding chat control highlights a value conflict between protecting the safety of children and preserving democratic rights such as privacy and freedom of expression. This thesis examines key arguments for and against the proposed EU CSAM-regulation, analyzing them through a normative argumentation analysis method. The analysis is based on the Swedish constitution, representing the common values of Swedish society. The study reconstructs arguments from four debate articles and evaluate them according to their relevance and validity, which makes up the arguments? total evidential strength.

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