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4857 Uppsatser om Life Cycle Assessment - Sida 4 av 324
Deltid och kön: En undersökning av deltidsarbetets utveckling under åren 1987-2005
This paper aims at assessing the relationship between female and male part-time employment and the business cycle in Sweden during the years 1987?2005 using quarterly time-series data and two alternative indicators of the business cycle. It further aims at determining whether the share of women working part-time has changed over time. Key results include that the relationship between the business cycle and female part-time employment is found to be significant and countercyclical. No significant effect is however found for men.
LCA av dricksvattendesinfektion : en jämförelse av klor och UV-ljus
Disinfection methods for drinking-water produced at the two water works of Stockholm Water Co are compared in this study. Three different nethods are compared; disinfection with chlorine gas, disinfection with sodium hypochlorite and disinfection with UV-light and monochloramine. The method used is Life Cycle Assessment, LCA. LCA is defined as the compilation and evaluation of the inputs, outputs and potential environmental impact of a product system shroughout its life cycle. The environmental burden is compared for the three different disinfection methods.
Kvinnors preventivmedelsanvändning under olika faser av det reproduktiva livet
Introduction: Studies have shown that women are not always satisfied with the effects of contraception and that contraceptive advice is perceived as non-specific. Aim: The purpose of this study was to investigate what contraceptive women have chosen to use in the different phases of their reproductive lives, and what they felt had influenced their choice. Method: A retrospective cross-sectional comparative study with a quantitative approach. A survey with fixed and multiple-choice options was sent to five hundred 45-year old women. Result: The study shows that various birth controls are different in the normal reproductive life.
Energieffektiv torkning av kläder : en studie av torktumlare med varm- respektive kallvattenanslutning
Tumble dryers and drying cabinets have to a large extent replaced the traditional way of drying clothes outdoors. They are faster, more convenient, require less space and can be operated regardless of weather conditions. This replacement has significantly increased residential energy consumption, due to the fact that tumbles dryers consume large amounts of electrical energy. In the USA 9 % of the households electric energy is consumed when drying clothes. Over 4 million tumble dryers are sold in Europe each year and 20 % of the residential electricity consumption in Sweden is used drying and washing clothes.
Cykeltidsoptimering av sjuaxligt robotsystem
This master thesis studies how much the cycle time, i.e. the time it takes for an industrial robot to perform a given task, can be reduced if an extra degree of freedom (DOF) is added to the robot system. The extra DOF consists of a linear track, which is supposed to be used in an optimal way. The problem has been studied using simulations in the robot simulation tool RobotStudio. To be able to run an optimization in Matlab, with the RobotStudio simulation cycle time as the object function, communication between Matlab and RobotStudio has been set up with an interface written in Visual Basic.
Design av verklighetsanknuten matematikundervisning
The aim of this study was to design short interventions based on the literature study, which will change the pupils? posture on mathematics and connections between problem-solving in mathematics and everyday life. An experimental group of 17 pupils in fifth grade participated in the study and were educated in everyday mathematics 20 minutes a day during four weeks. The intervention was measured in a pre- and after questionnaire, in order to control the design and discover possible changes in the pupils? posture on mathematics and connections between problems and everyday life.
Rytmterapi som behandlingsmetod vid stroke: en pilotstudie
Stroke is caused by a bleeding or infarct in the brain and is one of the most common diseases in Sweden today. The purpose of the study was to evaluate if Ronnie Gardiner?s Rhythm Therapy (RGR-therapy) has any effect, regarding motor control and the subjective experienced health related quality of life, on people who have been affected by stroke. The examination group consisted of eight people. The intervention consisted of RGR-therapy once a week during a period of nine weeks.
Logopeders bedömning av funktionell kommunikation hos personer med afasi : En enkätstudie riktad till logopeder i Sverige
There are several different methods of assessment of functional communication in individuals with aphasia. However, these are not very established in Sweden. A number of assessment methods are not translated and adapted to Swedish. The views about what functional communication means are scattered. The purpose of this study was to, with the help of a questionnaire survey, identify how Swedish speech and language therapists assess functional communication, to what extent and what they want that an assessment method should contain to be clinically useful.The study involved 54 clinically active speech and language therapists in the area of aphasia.
Synchronizing migration with birth: an exploration of migratory tactics in female moose
Migration and giving birth are crucial decisions for animals during their life cycle, which may have lasting consequences on their population demography and fitness. Migration can entail a variety of possible effects for an individual, such as access to high quality food and reduced risk for predation. The moose (Alces alces) in northern Sweden is partially migratory and moose females are known to give birth to one or two calves. The synchrony between time of calving and timing of migration has not been compared before, especially in terms of energy maximizing and time minimizing perspectives, which may provide vital cues for fitness benefits of migration. I investigated effect of timing of birth and individual life history on distance, timing, stopovers and duration of 190 individually marked female moose that have been tracked for multiple years in ten different areas in northern Sweden.
?Jag är inte som alla andra. Vad får jag för betyg?!? : En studie i bedömning och betygsättning av elever med funktionshinder i ämnet Idrott och Hälsa
This study is a study of the assessment and grading of Swedish students with physical disabilities in physical education. The purpose of the study has been to look into how teachers assess and grade students with physical disabilities, and if there are any difficulties or problems in this assessment and grading. Focus has been on students in year three to six because this is where the assessments and grading take place. It?s a qualitative study, where eight teachers have been interviewed using a semi-structured interview model.
Projektimplementering : En processorientering för att identifiera kritiska framgångsfaktorer vid implementering av projekt
SammandragDenna studie tar upp problematiken vid införande av administrativa stödprojekt vid Uppsala universitet, främst hur motstånd till förändring kan motverkas. Problemet definieras genom frågan: Hur kan Uppsala universitet effektivisera implementeringen av administrativa stödprojekt? Syftet med denna studie är att lyfta fram kritiska framgångsfaktorer vid genomförandet av projekt. Färdigimplementerade administrativa stödprojekt studerades genom personliga intervjuer med projektansvariga och administratörer på institutioner. Upptäckterna analyserades med hjälp av en processorienterad teori baserad på Demingcykeln.
Att fånga det svårfångade : En studie av bakgrunden till och tillämpningen av bedömningsinstrumenten ASI och DOK
ABSTRACTStandardized assessment instruments have increasingly come to be used in social work. Although national studies of ASI and DOK's reliability and validity has only been examined to a limited extent. In order to improve knowledge of assessment instruments conditions, relevance and scope, this present literature study highlights the background and the application of the interview methods ASI and DOK, used in swedish abuse and dependent care. In answering the survey questions, a qualitative content analytical method has been used. ASI and DOK are multidimensional interviews which take into account that several areas affecting the client's treatment outcome.
Solel och solvärme ur LCC-perspektiv för ett passiv-flerbostadshus
This master?s degree project concerns the combination of a multi dwelling passive house with solar energy for the generation of electricity and domestic hot water (DHW). Different alternatives with either solar thermal systems or photovoltaic (PV) systems are compared with two reference alternatives producing DHW from electricity or district heating. The economical comparison uses a life cycle cost (LCC) perspective based on the present value of expenditures for investment, energy and annual operating and maintenance.The energy yields from the solar energy systems were calculated by hand and with simulation software. Calculation and dimensioning of PV systems were carried out with a software called PVSYST.
Livscykelanalys av en ekologisk bomullsskjorta - miljöpåverkan från vagga till grav
This study includes a Life Cycle Assessment, LCA, on an ecological produced cotton shirt for the company Reflective Circle, which designs ethical and ecological clothes.Initially were cotton farming and textile production studied to gather basic knowledge about the processes. Since this shirt is being ecological produced in the whole production chain, we studied what an ecological production means, but also how a conventional production works. When this was done we could start to discuss the differences and similarities between the production of the shirt and general conventional production.When the LCA was first initiated, the main focus was on the green house gas emissions from the manure at the cultivation. Thereafter the process steps such as picking, ginning, carding, spinning, weaving and sewing were being studied. The picking is done by hand, but the rest of the processes are handed by machines which consumes energy.
Decentraliserat lager - ett steg mot flexibilitet
This study was conducted at Glimek AB, a company that has chosen to decentralize its central storage unit in order to increase production efficiencies. The purpose of the study was to identify the problems in the production cycle that lead to the decision to decentralize the central storage unit, as well as identifying what the decentralization entails. The effects of the decentralization have not been analyzed in the study, and consequently neither financial nor production disadvantages have been considered.Appropriate questions were formulated based on the chosen underlying theories, and were asked to selected individuals with relevant knowledge. The study is based on the information that was gathered from interviews with management as well as staff within the company. In addition, supporting information such as flowcharts, drawings, orders and decision support documents were supplied by the company.