The purpose of this work is to design and construct a device able to measure the mechanical attrition of oxygen carrier particles. Those particles are used in chemical looping combustion and in the present situation there is a lack of knowledge in how the attrition process work and in which extension. To find already tested solutions trying to answering this problem a literature study wascarried out and the best solution found was the so called Grace-Davison Jet-Cup method. This method is supposed to emulate the attrition caused by a cyclone separator and its advantages are that it is possible to use small test amounts, 5-10 g, and a thirty minutes long test will be enough to acquire useable results. An device was designed based on the Jet-Cup method with some slight modifications.

Today we have more game species than ever before in our landscape, both regarding number of species and number of individuals. The increasing number of wild species is an increase in game recourse for the countryside. The increase of game species, however, has negative effects on forests and agriculture land. The negative effects for forestry are damages on economic important trees, due to losses in production and quality. However there are ways to decrease the damage on valuable and important trees.

Unhealthiness is not just a damaged back or asbestos. The fact that mental ill-health seems to increase in our society is well known. Statistics from Arbetsmiljöverket proves a fourfold increase of work-related disorders since 1997. These are primarily caused by organizational and social factors, 60% are considered caused by stress and a heavy workload. Sick leave due work related fatigue and depressions are scarily common today.

When exposed to them, isocyanates can induce serious injuries in the respiratory tract and irritation on the skin and in the eyes. They are therefore interesting from the point of view of occupational health. The purpose of this thesis was to collect isocyanates in air with impinger-filter samplers and solvent free samplers. Furthermore the isocyanates were to be analyzed with liquid chromatography-mass spectrometry. The solvent free sampler consists of a polypropylene tube and filter holder fitted with glass fiber filters impregnated with derivatization reagent, coupled with a pump.

Hypertoni är en folksjukdom som drabbar en femtedel av den svenska befolkningen. Orsaker till hypertoni kan vara livsstilsrelaterade, som stress, övervikt eller fysisk inaktivitet. Distriktssköterskor har som uppdrag att kontrollera patienters blodtryck, ge stöd och rådgivning till förändrad livsstil. Detta för att främja hälsa och förebygga hypertoni eller förbättra ett förhöjt blodtryck.Syftet med examensarbetet är att sammanställa befintlig kunskap från litteratur om distriktssköterskors hälsofrämjande omvårdnadsåtgärder till patienter med hypertoni.Examensarbetet är en litteraturstudie där kunskap från 12 vetenskapliga studier förts samman till ett nytt övergripande resultat, en metasyntes. Resultatet visar att de hälsofrämjande omvårdnadsåtgärder distriktssköterskor utför till patienter med hypertoni sker som Hälsoutbildning på standardiserat eller personcentrerat sätt.

The purpose of this study was to look for tendencies that social media can contribute to exposing users to a stronger perception of opinion polarization, and further to see if the daily presence of social networking sites can put normative pressure on the users. The study was made using a survey with participants from Umea? University during the time frame of november-december 2014. The theoretical framework behind the study was mainly drawn from The Spiral Of Silence by Elisabeth Noelle-Neumann and was further supplemented with more current research, studying the effects from The Spiral Of Silence in the modern and more fragmented media landscape that exists now then when her theory was written. Further theoretical tools for analysis of the results came from Michel Foucault and his discussions in Discipline and punish, specifically his views on how surveillance can be discontinous in practice, but still permanent in it?s effects.The results of this study indicates that social media users tend to isolate themselves from uncomfortable opinions, and do not follow or read opinions they do not already agree with.

The purpose of this Bachelors thesis is to investigate teachers' work and attitude to life in relation to the curriculum. Furthermore, how teachers look at students' emotional/social development in their general development. The thesis also reviews the criticism from The Swedish School of Authority on various programs primarily SET (social and emotional training)Three qualitative interviews and four observations at three different schools with teachers have been conducted. Using theories of social constructivism, deliberative conversation and social and emotional skills, the intention is to interpret the gathered material.The results show that the teachers see knowledge of life in school as important in the foundation of students´ emotional/social development. One teacher follows the SET program and two teachers? took inspiration from various other programs and ideas.

The purpose of this degree-project was to investigate the possibilities for primary air preheating into the two smallest waste incineration boilers of Halmstad Energy and Environment. The investigation is a pre-study which has the primary goal to evaluate technical and financial offers from companies that manufacture primary air preheater, and investigate if it is technically and financially profitable to do a purchase on primary air preheaters in the future.In the pre-study it is proposed that it is most efficient to have individual primary air preheater, one for each incineration boiler and the primary air are also proposed to be preheated by hot water in the pre-study. Further in the pre-study it is proposed that the heat-exchanger should have plain tubes instead of finned tubes, to avoid getting dirty fast. The space in the boiler-room is limited, and therefore the major problem was to fit in the primary air preheaters into the boiler-room. By comparing the different offers from the companies, the result in the pre-study shows that the offer from the company C.A.

Intergovernmental Panel on Climate Change (IPCC) recognizes glaciers as the best land-indicator of climate change. A variety of studies have concluded, using both modeling and field studies, that above all climate parameters precipitation, particularly winter precipitation, and summer temperature controls the change in glacier mass balance. With global warming almost all glaciers on Earth are losing mass. In this study, the summit-glacier constituting Kebnekaise's south summit (called the Southern-summit henceforth), Sweden's highest point, is studied to see how it is affected by winter precipitation and summer temperature during the period 1968?2013.

Bakgrund: Sällskapsdjur har ett flertal positiva hälsoeffekter på människor och det har lett till att viidag använder djur inom vården, främst hundar.Syfte: Syftet med denna litteraturstudie var att undersöka hundens användande inom vården, attbeskriva och förklara dess effekt på människor.Metod: Metoden var en litteraturstudie och elva vetenskapliga artiklar granskades. Dessaanalyserades och sammanställdes utifrån gemensamma teman.Resultat: Vårdhundar inom vården kan i de flesta fall reducera ångest och acceptansen av vårdhundär mycket god både bland patienter, anhöriga och personal. Minskning av blodtryck ochhjärtfrekvens råder det delade meningar om, då vissa studier visar en minskning av dessa och andragör det inte. Vårdhundar kan användes till att vara motivationshöjande för patienten.Slutsats: Vårdhundar har många positiva effekter på människor, men fler studier behövs för att seom dessa resultat inte bara gäller för de grupper som har undersökts i studien utan även äröverförbara till andra grupper..

Chapter 1 defines the aim of the project and gives a general orientation about ground heat extractors. In chapter 2 physical processes that could be expected to be involved in the heat transport around a ground heat exchanger are discussed. It is shown from a literature study what amount of moisture transport due to thermal gradients there could be expected in a ground heat exchanger. The conclusion is drawn that the moisture gradient (Sr) is of same magnitude as the driving temperature gradient (°C). At the expected amount of increased moisture around the pipes the moisture transport could be considered to have a little effect on the brine temperature.

Trycksår är en vårdrelaterad skada vars prevalens är utbredd på sjukhus i Sverige. Denna hudskada uppkommer när ett ihållande tryck orsakar att underliggande vävnad skadas. Riktlinjer finns utformade för hur preventionsarbetet med trycksår ska utföras, och syftar till att minska prevalensen av trycksår. Syftet med studien var att undersöka sjuksköterskors syn på trycksårsprevention relaterat till patienter som ligger inlagda på somatisk vårdavdelning. De undersökningsmetoder som användes var av både kvalitativ och kvantitativ ansats. Materialet samlades in via enkäter och det slutliga informantantalet uppgick till 29 informanter.

Intense competition and pressure from various market participants is prevalent in today?s modern and technologically developed society. It is important to keep a high standard of service and customer care to be able to keep your position on the market. The focus of the paper is to study how a store manager can influence their employees to perform better on the job, in terms of service to customers and increased sales. The aim is to analyze the different tools store managers use to motivate their employees with the goal of improving service to the customer and to increase sales.

Studies have shown that politicians are significantly more likely to become victims of violent crime than other citizens in Sweden. In fact increasing political rank and engagement are directly proportionate to increased risk for violence. Threat towards politicians is not only dangerous to the individuals involved but also to the democratic system as a whole.Political scientists the world over have done a lot of research on democracy, but I have been unable to find a single method or theory that examines how violence, threat and harassment affect political leaders and democratic systems.The aim of this study is to expand the existing model made by Tommy Möller, professor in political science. In his model he presents 11 factors that affect political leaders ability to act. My aim is to develop his model by adding a 12 th factor ?violence, threat and harassment?.

It's an everyday experience shared by many that nature can be of help in relieving pain, reducing stress, support mental recovery etc. In the last three decades or so this experience has also found support in a large number of scientific investigations. Among other things the experience of nature has been shown to reduce stress and pain in patients and to boost concentration and reduce impulsive behavior in children. Most of this research however has mainly been concerned with the visual modality. In this thesis the aim has been to focus on the auditory modality in this context by trying to reveal some effects on people from the exposure of nature sounds played indoors in three different environments: a grammar school class room, a kindergarten play room and a post-surgery wake up room at an intensive care unit.