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Perfluoroktansulfonsyra, PFOS en av människan tillverkad organisk syra, vars väteatomer har blivit utbytta mot fluoratomer och är en nyligen upptäckt förorening som tros finnas i 3,6 miljoner svenskars dricksvatten. Den här kandidatuppsatsen är en litteraturstudie i vilken förekomsten av PFOS i grundvattnet studeras. Det är förmågan att bilda ytbeläggningar som är avvisande mot smuts, fett och vatThe manufacture of products containing PFOS started in the 1950s, and has mainly been used as fire-fighting foam, (Aqueous Film Forming Foam), flooring, textiles, leather impregnation, cleaning and in impregnated paper. This has resulted in a global contamination that is widely spread in the hydrosphere, biosphere and the atmosphere; due to long and intensive use without any regulations. PFOS is a

One of the main qualities of life in Icelandic society is the earth’s heat that has been harnessed and fed into the homes of the citizens. The swimming pool is the clearest and most visible manifestation of these qualities of life. Bathhouses are a regular part of many people’s daily lives, and human life in the pools is a fascinating part of Icelandic society. Architecture plays a key role there,

Energifrågan gällande tillgång, kapacitet och kostnad för el har under de senaste åren blivit en aktualitet i det svenska men även europeiska samhället. Bakgrunden till att energifrågor har blivit angelägna i nuläget är främst en ökad elektrifiering av samhället, ökade kostnader på grund av kriget i Ukraina 2022 och kapaciteten som inte har motsvarat efterfrågan. I samband med en osäkrare omvärld,The purpose of this study was to investigate whether a single-family house can, in the event of a possible crisis when electricity is not available, manage the heating of a house during the worst week of the year when the house is off-grid. Furthermore, to calculate the potential climate impact for the house's energy demand during that week. Thus, three different heating scenarios have been ch

English teachers in Swedish upper secondary school often focus on Standard British and American English, although they agree with the syllabus that different varieties of English should be included in teaching. This study aimed to investigate to what extent English teachers include different varieties of English in the classroom. Previous work has failed to provide a comprehensive overview of the

När maten blir en risk: Om smittskydd och ansvar inom äldreomsor gen Livsmedelsburna sjukdomar förekommer över hela världen och kan orsaka sjukdom hos alla människor. Äldre människor är i riskgrupp på grund av deras nedsatta immunsvar och längre återhämtningstid. Detta gör att våra äldre drabbas hårdare av sjukdomar än andra. Samtidigt är det en del av vår äldre befolkning som bor på äldreboenFoodborne diseases are a growing global concern, and a shift in trends has occurred re garding salmonella infections in Sweden. The purpose of this study is therefore to inves tigate how nursing homes in Sweden work to prevent foodborne infections. The study was conducted through semi-structured interviews with staff at nursing homes and with representatives from inspection authorities to gather

Studien syftar till att kartlägga entreprenörers anbudsprioritering och ge offentliga beställare kunskap om marknaden för att kunna anpassa sina förfrågningsunderlag. Studien har genomförts som en kvalitativ studie innehållande litteraturstudie, dokumentstudie och intervjustudie. Tre administrativa föreskrifter, AF-delar, har analyserats i dokumentstudien. I intervjustudien har både entreprenad-fThe study aims to map contractors’ bid prioritization and provide public clients with knowledge about the market to be able to adjust their tender documents. The study was conducted as a qualitative study including a literature review, document study, and an interview study. Contractual tender documents were analyzed in the document study. In the interview study, both contractors and public procu

Med åldrande befolkningar, ojämn tillgång till vård och brist på personal står dagens sjukvårdssystem inför många utmaningar. Teknologiska framsteg, särskilt inom artificiell intelligens (AI), har varit en av de främsta drivkrafterna för innovation inom flera industrier. Även om hälso- och sjukvårdssektorn utvecklas långsammare jämfört med andra branscher, finns det stor potential att avlasta vårdWith aging populations, unequal access to care, and shortages of staff, healthcare systems today are facing many challenges. Technology advancements, with artificial intelligence (AI) in particular, have been one of the main drivers of innovation in multiple industries. Although the healthcare sector is moving slower compared to other industries, there is great potential for relieving healthcare w

Bisexuella personer är underrepresenterade i nuvarande forskning om sexualitet. Den forskning som finns om bisexuellas sexualitet visar motstridiga resultat. Syftet med studien var därför att utforska hur bisexuella upplever sin sexualitet och identitet, och på så vis skapa en bättre grund för framtida forskning. Studien genomfördes inom forskningsprojektet “Faktorer som påverkar den sexuella tillBisexual people are underrepresented in current scientific research on sexuality, with existing research showing contradicting findings. The aim of this study was to explore how bisexual individuals experience their sexuality and identity to build a better base of understanding for future research. The study was conducted within the research project “Factors affecting sexual satisfaction: An explo

The report investigates whether ultra-high-frequency ultrasound at 30 MHz can distinguish healthy- from diseased intestinal tissue in infants with Hirschsprung's disease with the same accuracy as 50 MHz. Hirschsprung's disease is defined as the absence of ganglion cells in the distal parts of the intestine. During treatment, the affected sections of the intestine are surgically removed. Th

This thesis investigates the use of several acceleration schemes to improve the performance of the primal-dual hybrid gradient algorithm for linear programming (PDLP), a state-of-the-art first-order method for linear programming (LP). The three main acceleration schemes investigated are: Polyak heavy ball momentum, Nesterov acceleration, and steering vectors selected in a residual momentum directi

Har verkligen denna nya fälla för nattfjärilar vad som krävs för att störta den äldre modellen? LED har börjats använda i större grad bland levandefällor för nattfjärilar, och Lunds Universitet har förut endast köpt en sådan typ av fälla från Nederländerna. Men numera har en liknande version med möjlighet till mer ljus byggs vid Biologiska Insitutionen i Lund, och test har visat att nattfjärilarnaDue to the increasing significance of moth species’ contributions to pollination, and the relatively new advancements of AI and LED within this field of study, there is interest in developing a light trap that is both easier to get a hold of and more adapted to the conditions of a northern country like Sweden. In this study I evaluate one such LED-based Light trap and compare it to a more well-tes

Problem: The Milky Way disk consists of two distinct components, the thin and thick disk, each with unique kinematical, elemental, and age-related properties. Among all the properties considered, age stands out as the only one that does not exhibit significant overlap, thereby offering clearer separation between the populations. Stellar ages, determined through isochrone fitting, are reliable main

Objectives: Coagulation test results may be affected by hemolysis, icterus and/or lipemia (HIL). Detailed guidelines for HIL-management are missing, both for manual and automatic HIL-checks. The aim of this survey was to provide an overview of the practical procedures for the detection and handling of HIL-samples used by laboratories in Europe in the context of coagulation testing. Methods: A Surv

Denna uppsats behandlade ett typfall enligt vilket en person sökte anstifta ett mord, men den anstiftade förväxlade identiteten på måltavlan och mördade anstiftarens kumpan. Syftet med uppsatsen var att utreda och analysera vilket straffrättsligt ansvar anstiftaren har i scenariot. Till vägledande hjälpmedel presenterades två alternativa lösningsmodeller från juridisk doktrin: ekvivalensmodellen oThis thesis intended to examine a scenario regarding instigation of murder in which the instigated mistook an accomplice of the instigator for the intended victim. The purpose of the thesis was to assess the criminal liability of the instigator in that scenario. Two alternative models were presented within legal doctrine: the model of equivalence, and the model of specialty. According to the model

Syfte: Syftet med denna studie är att undersöka unga konsumenters attityder till företags sociala ansvarstagande. Forskningsfrågorna är 1. Hur ser unga konsumenters attityder ut till socialt ansvarstagande? 2. Vilka åtgärder bör tas enligt informanterna, för att förändra konsumenters uppfattning om företag med bristande socialt ansvarstagande? Teoretisk referensram: Denna studie använder en teoretPurpose: The purpose of this study is to examine young consumers' attitudes towards companies' social responsibility. The research questions are 1. What are the attitudes of young consumers towards social responsibility? 2. What measures should be taken according to the respondents, to change consumers' perception of companies with a lack of social responsibility? Theoretical foundatio

Detta examensarbete handlar om PLC-programmering av en pelletspanna till ett nytt fjärrvärmeverk som byggs i Landskronas stadsdel Örja i samarbete med Deterministic Control AB, för en slutkund Landskrona Energi AB. Material som P&I-schema, funktionsbeskrivning, I/O-lista levererades av ett annat företag, AKJ. All programmering görs i ett ABB 800xA-system. De viktiga begrepp som examensarbetet

This thesis aims to explore the possibility of using deep learning techniques to mine opinions on Twitter, with the objective to predict the political opinion distribution in Sweden. Different methods of gathering and annotating training data are evaluated to achieve accurate and reliable predictions. The models are quite successful at predicting test data, achieving F1-scores in the range of 70 %

Our study aims to get a greater understanding of why students choose a social work education and why the education is so popular despite the social service’s negative reputation. We also aim to get an understanding of the student's intended career paths. We used Hans-Georg Gadamer's hermeneutic approach to the study so that we could use our own interpretations of why students made their ch

The purpose of this qualitative study was to research how people's experience of having a sibling with an autism spectrum disorder affected their upbringing. We held six semi-structured interviews where we examined three different aspects of the participants’ lives in regard to their upbringing and sibling. 1: Their relationship with their sibling. 2: Their role in the family. 3: What kind of

Despite a global increase in gender equality, intimate partner violence (IPV) still plagues all nations. Moreover, IPV is still a heavily stereotyped crime where women are victims and men are perpetrators. Due to the gendered nature of IPV, information that either conforms or deviates from gender expectations can change the perceptions of perpetrators and victims of IPV. The present study investig