Poly- and perfluoroalkyl substances (PFASs) are a group of environmental contaminants that have gained increasing attention due to their potential to bioaccumulate, environmental persistence and potential toxicity. PFASs have been found in surface water, sediment, air, soil, sludge and ice caps globally, as well as in wildlife and humans. Furthermore, PFASs have also been detected in drinking water, leading to raised concerns for human health, since drinking water is one of the most significant sources of PFASs for the general population. Conventional water treatment techniques have shown to be ineffective removing PFASs, highlighting the importance for further research to develop efficient removal techniques. The aim of this study was to investigate the removal efficiency of PFASs in water using two treatment techniques; granular activated carbon (GAC), type Filtrasorb 400®, and anion exchange (AE), type Purolite A-600. Additionally, the effect of dissolved organic carbon (DOC) on removal efficiency was studied.

The Goal with this Master of Science thesis is to expand the possible turbine efficiencymeasurements on an exhaust turbocharger. It was done as a part of the CICERO competencecentre. To feed the turbine with air a special flow rig has been used. Instead of loading theturbine by just restricting the compressor flow a docking system for an electrical dynamometer isdesigned to use the dynamometer as an additional loading source. By using an electricaldynamometer as loading device for the turbine, measurements are not depending on compressorperformance.A large part of the work consists in designing accessories for the dynamometer.

Successful broiler production in hot climates requires knowledge of how birds are affected by heat stress. It is important with access to water and good ventilation to facilitate coping with the heat. It may be useful to reduce the consumption of feed during the hottest hours of the days, which together with a few hours of extra light available could improve both productivity and animal welfare. The vision in birds is superior to that of humans and most other mammals. Continuous light and light with low intensity can cause eye injuries, affect the eye development in young chicken negatively, as well as provide increased incidence of foot pad lesions. Access to light affects the production but also the welfare of birds.

Denna studie görs inom det arbetslivspedagogiska fältet och behandlar arbetsrotation på ICA-butiker. Syftet är att undersöka hur arbetsrotation sker hos medarbetare inom olika ICA-butiker och vilken betydelse det får för lärandet. Lärandet som undersöks är hur individer kan tillgodogöra sig yrkeskunskap utifrån de läroprocesser och lärandesituationer som uppstår i samband med arbetsrotation.De teoretiska verktyg som används grundar sig i Ellströms feed-forward och feed-back faser, de tre regleringsnivåerna av lärande samt en teori om subjektiva och objektiva handlingsutrymmen. Studien använder sig även av Börnfelts teori om en formell och informell organisation.Den metod som använts är kvalitativ och grundar sig i öppna intervjuer med åtta anställda från ICA-butiker med olika butiksformat, med det syftar vi till ICAs butiksformat; Nära, Supermarket, Kvantum och Maxi. Intervjuerna har transkriberats och analyserats ner till fyra olika teman; Arbetets innehåll, Avvikande situationer, Formellt Medarbetarskap och Informella Relationer.Resultatet visar att om anställda roterar mellan avdelningar eller ställs inför utmaning öppnar det upp individers handlingsutrymme, vilket leder till feed-forward faser som i sig genererar lärosituationer där anställda kan lära sig på en begreppslig- och intellektuell nivå.

Swedish healthcare is in continuous need of cost savings and efficiency improvements in order to meet the increased demand for care. The theories of lean, developed from the industry, are applied more frequently on healthcare systems to increase effectiveness and reduce waiting times in patient processes. However, some processes seem to be more successful in their lean implementation than others. In this thesis, factors influencing flow efficiency in lean healthcare are examined. Through interviews with the top executive board at Capio St Göran's hospital, data is collected in order to analyze reasons for success.

This report is introduced with a presentation of fundamental electromagnetic theories, which have helped a lot in the achievement of methods for calculation and design of microstrip transmission lines and circulators. The used software for the work is also based on these theories. General considerations when designing microstrip solutions, such as different types of transmission lines and circulators, are then presented. Especially the design steps for microstrip lines, which have been used in this project, are described. Discontinuities, like bends of microstrip lines, are treated and simulated.

Weaning is one of the most critical events in the piglet production with problems such as growth check and post-weaning diarrhea as a result. The lighter the piglets are when the growth check occurs, the harder they have to get back to normal growth rate. Creep feeding of piglets is used to reduce the problems by increasing the weaning weight and adapting the digestive tract to a starter diet. Hodge (1974) showed that the sow?s milk can not provide enough nutrients for maximal growth rate.

The main focus of the essay is to investigate if bugging can be justified from two ethics perspectives, the teleological and the deontology. I?ve chosen to emanate from two specific values which I believe is especially relevant to the ethical problems of bugging, efficiency in fighting crime and the personal integrity. To be able to illustrate this conflict between different values did I do an analysis of an official report which had the task to explore if Sweden should introduce bugging as a new means of compulsion. The official report's statement was that the police should have modern instrument to fighting crimes efficient, including bugging.My examination of the report showed that they used several arguments derived from both the efficiency in fighting crime perspective and the personal integrity perspective.

This study aims at norming a new objective method to track and measure jaw movements in 3D (three dimensional) during chewing in the young adult population (n=41, age 22-30). Norm values of the range of movements and the duration were calculated. Intra and inter rater reliability was high. Masticatory efficiency among participants was evaluated with a two-colored wax, analyzed with picture analysis software. Regression analysis was used to calculate the relationship between movement and duration variables and masticatory efficiency.

The purpose of this thesis has been to determine experimentally how good a peltierelement is to convert waste heat from wood burning. Three different peltier elementswere used in a comparison study. The comparison was mainly done to know howmuch power could be obtained from each element. Even, a circuit with a step-upfunction has been created to give a higher output voltage than the peltier elementitself. The result of the experiments was a low output power, the highest valuereached 2.18W.

Efficient energy use in the housing sector is crucial for achieving a sustainable society. The expansion of this sector only represents a fraction of the existing houses, hence it?s within the existing houses the potential for energy savings lie. This potential has been analyzed in order to determine if it?s possible to cut the current energy demand in half.

Automatic rumination measuring can be applied as a health indicator in dairy farming but is also highly desirable for research purposes. This study aimed to validate the technical functionality of the product RuminActTM, which employ acoustics to monitor rumination duration. The time budget of high yielding cows was studied and possible differences in rumination time between 13 rations were interpreted. Further the study examined what affects daily rumination and rumination efficiency. The validation was performed with direct observations that were compared to the automatically recorded rumination durations.

As a result of globalization, multinational teams are being more frequently used in today´s businesses. This specific type of team can be described as heterogeneous when it comes to nationality and linguistics. The aim of this study was to explore the concept of multinational teams. This was made using culture as a main concept, and nationality, linguistics, and organizational culture in order to describe it. We intended to say something about how this type of team´s efficiency; when it comes to satisfaction and performance; was affected by national and linguistic heterogeneity within the team.

Mechanical harvesting may result in timber damages leading to reduced saw log quality. The initiator of this study was VIDA ? a privately owned concern operating in the value-adding process industry of forest raw materials. The aim of this study was to examine the type and amount of damages on Alvestakubb caused by the harvester head during the cutting process. The aim was also to compare the damages caused by different types of feed rollers and to evaluate the effects of temperature on damage occurrence.

We have chosen to write our essay in collaboration with Varbergs kommun, where our starting point is to improve energy efficiency by management control. Their occupation separates from a pure profit driven corporation and therefore the management controls have to be adapted accordingly.  The reason why we have chosen to write an essay about the management control opportunities to improve the energy efficiency depends on two different reasons. The first reason is that we find it very interesting, how with support from the management control it is possible to improve different parts of the operation. And the second reason is that Varbergs kommun expressed a wish that they wanted to improve their energy efficiency process.The purpose of the essay is to describe and analyze the opportunities with support from the management control to help improving the process of energy efficiency in a municipal operation.