KinFit -- A Kinematic Fitting Package for Hadron Physics Experiments

A kinematic fitting package, KinFit, based on the Lagrange multiplier technique has been implemented for generic hadron physics experiments. It is particularly suitable for experiments where the interaction point is unknown, such as experiments with extended target volumes. The KinFit package includes vertex finding tools and fitting with kinematic constraints, such as mass hypothesis and four-momentum conservation, as well as combinations of these constraints. The new package is distributed as an open source software via GitHub. This paper presents a comprehensive description of the KinFit package and its features, as well as a benchmark study using Monte Carlo simulations of the $pp\rightarrow pK^+\Lambda \rightarrow pK^+p\pi^-$ reaction. The results show that KinFit improves the parameter resolution and provides an excellent basis for event selection

Safety of children in cars: A review of biomechanical aspects and human body models

The protection of children in motor vehicle crashes has improved since the introduction of child restraint systems. However, motor vehicle crashes remain one of the top leading causes of death for children. Today, computer-aided engineering is an essential part of vehicle development and it is anticipated that safety assessments will increasingly rely on simulations. Therefore, this study presents a review of important biomechanical aspects for the safety of children in cars, including child human body models, for scenarios ranging from on-road driving, emergency maneuvers, and pre-crash events to crash loading. The review is divided into four parts: Crash safety, On-road driving for forward facing children, Numerical whole body models, and Discussion and future outlook.The first two parts provide ample references and a state-of-the-art description of important biomechanical aspects for the safety of children in cars. That children are not small adults has been known for decades and has been considered during the development of current restraints that protect the child in the crash phase. The head, neck, thorax, and pelvis are body areas where development with age changes the biomechanics and the interaction with restraint systems. The rear facing child seat distributes the crash load over a large area of the body and has proved to be a very efficient means of reducing child injuries and fatalities. Children up to age 4. years need to be seated rearward facing for optimal protection, mainly because of the proportionally large head, neck anthropometry and cartilaginous pelvis. Children aged 4 up to 12. years should use a belt positioning booster together with the vehicle seat belt to ensure good protection, as the pelvis is not fully developed and because of the smaller size of these children compared to adults. On-road driving studies have illustrated that children frequently change seated posture and may choose slouched positions that are poor for lap belt interaction if seated directly on the rear seat. Emergency maneuvers with volunteers illustrate that pre-crash loading forces forward-facing children into involuntary postures with large head displacements, having potential influence on the risk of head impact. Children, similar to adults, benefit from the safety systems offered in the vehicle. By providing child adaptability of the vehicle, such as integrated booster cushions, the child-restraint interaction can be further optimized. An example of this is the significant reduction of lap belt misuse when using integrated boosters, due to the simplified and natural positioning of the lap belt in close contact with the pelvis. The research presented in this review illustrates that there is a need for enhanced tools, such as child human body models, to take into account the requirements of children of different ages and sizes in the development of countermeasures.To study how children interact with restraints during on-road driving and during pre- and in-crash events, numerical child models implementing age-specific anthropometric features will be essential. The review of human whole body models covers multi body models (age 1.5 to 15. years) and finite element models (ages 3, 6, and 10. years). All reviewed child models are developed for crash scenarios. The only finite element models to implement age dependent anthropometry details for the spine and pelvis were a 3. year-old model and an upcoming 10. year-old model. One ongoing project is implementing active muscles response in a 6. year-old multi body model to study pre-crash scenarios. These active models are suitable for the next important step in providing the automotive industry with adequate tools for development and assessment of future restraint systems in the full sequence of events from pre- to in-crash. Document type: Articl

Presence of CD8+ T Cells in the Ectocervical Mucosa Correlates with Genital Viral Shedding in HIV-Infected Women despite a Low Prevalence of HIV RNA–Expressing Cells in the Tissue

The female genital tract is a portal of entry for sexual HIV transmission and a possible viral reservoir. In this study, the ectocervical CD8+ T cell distribution was explored in situ and was related to expression of CD3 and HLA-DR and presence of HIV RNA. For this purpose, ectocervical tissue samples and genital secretions were collected from HIV-seropositive (HIV+) Kenyan female sex workers (FSWs) (n = 20), HIV-seronegative (HIV−) FSWs (n = 17), and HIV− lower-risk women (n = 21). Cell markers were assessed by in situ staining and by quantitative PCR. HIV RNA expression in tissue was analyzed by in situ hybridization, and viral shedding was assessed by quantitative PCR. The HIV+FSW group had a higher amount of total cells and CD8+, CD3+, and HLA-DR+ cells compared with the HIV−FSW group and HIV− lower-risk women. The majority of CD8+ cells were CD3+ T cells, and the numbers of CD8+ cells correlated significantly with plasma and cervical viral load. HIV RNA expression in situ was found in 4 of the 20 HIV+FSW women but did not correlate with cervical or plasma viral load. Thus, the HIV+ women displayed high numbers of CD8+, CD3+, and HLA-DR+ cells, as well as a limited number of HIV RNA+ cells, in their ectocervical mucosa; hence, this localization cannot be neglected as a potential viral reservoir. The elevated levels of CD8+ T cells may play a role in the immunopathogenesis of HIV in the female genital tract

Presence of CD8+ T Cells in the Ectocervical Mucosa Correlates with Genital Viral Shedding in HIV-Infected Women despite a Low Prevalence of HIV RNA–Expressing Cells in the Tissue

The female genital tract is a portal of entry for sexual HIV transmission and a possible viral reservoir. In this study, the ectocervical CD8+ T cell distribution was explored in situ and was related to expression of CD3 and HLA-DR and presence of HIV RNA. For this purpose, ectocervical tissue samples and genital secretions were collected from HIV-seropositive (HIV+) Kenyan female sex workers (FSWs) (n = 20), HIV-seronegative (HIV−) FSWs (n = 17), and HIV− lower-risk women (n = 21). Cell markers were assessed by in situ staining and by quantitative PCR. HIV RNA expression in tissue was analyzed by in situ hybridization, and viral shedding was assessed by quantitative PCR. The HIV+FSW group had a higher amount of total cells and CD8+, CD3+, and HLA-DR+ cells compared with the HIV−FSW group and HIV− lower-risk women. The majority of CD8+ cells were CD3+ T cells, and the numbers of CD8+ cells correlated significantly with plasma and cervical viral load. HIV RNA expression in situ was found in 4 of the 20 HIV+FSW women but did not correlate with cervical or plasma viral load. Thus, the HIV+ women displayed high numbers of CD8+, CD3+, and HLA-DR+ cells, as well as a limited number of HIV RNA+ cells, in their ectocervical mucosa; hence, this localization cannot be neglected as a potential viral reservoir. The elevated levels of CD8+ T cells may play a role in the immunopathogenesis of HIV in the female genital tract

Musikundervisning : diskursiv konstruktion och legitimering av teori och praktik i en svensk gymnasieskola

The overall purpose of this thesis is to describe and discuss the discursive constructions and legitimisations of Music and Music theory in Swedish upper secondary school context. Thereby, this thesis is part of the construction and debate concerning theory vs practice in Music education.  The study is based on classroom observations and interviews with teachers and students. The study is conducted during two consecutive autumn semesters, where the first autumn observations are conducted in the Music subject Ensemble, and the second semester in the Music theory subject Aural skills and music theory as well as Ensemble. The results and analysis show that Music and Music theory are predominantly differently constructed, through the discourses permeating the courses within the subjects. Ensemble, as a Music subject, is constructed through musical practice, and only activities that are not directly related to playing – as an activity – need legitimisation, whereas Music theory as a subject appear as continuously legitimised through its connotations to the Music subject. The Ensemble course is constructed as the nucleus around which other parts of the education pivots, including courses in Music theory.  Through the analysis of events, event series, regularities and condition of possibility (Foucault, 1970), present thesis demonstrates that expressions of resistance and challenge for the regulatory discourses within the two subjects endure. However, discourse flexes and bends though continue to permeate the regular events and thus also the condition of possibility. External context and professional culture (Ball et al., 2012), is viewed as entailing discursive rooms and views that construct both theory and practice. External context, such as genres of music outside of ensemble education, and the teachers’ professional cultures as musicians permeates the discursive construction of the ensemble subject as well as teacher identity.  In conclusion, Music and Music theory as subjects in upper secondary education, as they appear in the context of this study, can hence be viewed as two points on a balance-board, where the weight of discursive power vii shifts from one side to the other dependent on within which discursive (class)room they are taught.

Gränslöst ansvar? -En fallstudie om ansvarsutkrävandet i samband med införandet av ID-kontrollerna inom Öresundstågstrafiken

Ansvarsutkrävande är en del av demokratin - att kunna utkräva ansvar för aktörers beslut och handlingar anses vara en grundbult i demokratin och ger legitimitet till det politiska systemet. Denna uppsats behandlar vad som händer när ansvarsrollerna inom det politiska systemet blir otydliga, vilket i sig leder till ett komplext ansvarsutkrävande. Studien är utformad som en fallstudie av verkställandet av ID-kontroller för öresundstågstrafiken den 4 januari 2016, i vilken styrningskedjan kartläggs. Utifrån denna kartläggning framgår det att styrningskedjans otydlighet bland annat ligger som grund för att ansvarsutkrävandet är komplext. Empirin har analyserats utifrån principal-agent-teorin, i vilken det framgår att särintressena mellan aktörerna samt deras villrådighet över sin roll i ansvarskedjan bidrar till otydligheten av ansvar i fallet. Studiens resultat pekar på att otydligt ansvar leder till ett komplicerat ansvarsutkrävande, vilket i sin tur får en urholkande effekt på det demokratiska systemets legitimitet

Revisorers arbetsuppgifter : En kvantitativ studie om revisorers arbetsuppgifters förväntade utveckling efter avskaffandet av revisionsplikten med paralleller dragna till Tyskland

Titel: Revisorers arbetsuppgifter – En kvantitativ studie om revisorers arbetsuppgifters förväntade utveckling efter avskaffandet av revisionsplikten med paralleller dragna till Tyskland Författare: Bohman, Kaisa (Mälardalens högskola) Gunstad, Anna-Karin (Mälardalens högskola) Handledare: Riitta Lehtisalo Seminariedatum: 2010-06-04 Institution: Akademin för hållbar samhälls- och teknikutveckling Kurs: Kandidatuppsats i företagsekonomi, 15 hp Examinator: Cecilia Lindh Nyckelord: Revisionsplikt, revisor, revision, arbetsuppgifter, Tyskland Bakgrund: Den 1 november 2010 träder en ny lag i kraft som avser avskaffandet av revisionsplikten i Sverige för små aktiebolag. När ramverket runt revisorerna förändras måste de anpassa sig för att bli så effektiva och verksamma som möjligt. Tyskland har i dagsläget ett system där mindre aktiebolag inte behöver revidera sina räkenskaper. Sverige och Tyskland har sina rötter i kontinental redovisningstradition vilket bidrar till att Tyskland kan anses vara ett föregångsland till Sverige. Syfte: Syftet med uppsatsen är att undersöka hur revisorer tror att deras arbetsuppgifter förändras efter avskaffandet av revisionsplikten. Syftet är även att dra paralleller till den tyska utvecklingen av arbetsuppgifter för revisorer för att undersöka om det kan ge en bild av den kommande svenska utvecklingen. Vi kommer även i studien identifiera intressenter som kommer att påverka denna förväntade framtida utveckling. Metod: Studien är av kvalitativ karaktär där intervjuer med revisorer har genomförts för att få en ökad förståelse för problemet. Studien genomfördes genom intervjuer i både Sverige och Tyskland. Slutsatser: Slutsatser vi kan dra är att de svenska revisorerna tror att deras arbetsuppgifter kommer att utvecklas i riktning mot rådgivning, konsultation och punktinsatser. De svenska revisorerna tror att intressenter såsom kreditgivare, leverantörer, företag och Skatteverket, kommer att påverka hur deras framtida arbetsuppgifter kommer att se ut.Titel: Auditors tasks - A qualitative study on auditor’s tasks expected development after the abolition of the audit requirement with parallels drawn to Germany Authors: Kaisa Bohman Anna-Karin Gunstad Advisor: Riitta Lehtisalo Seminar date: 2010-06-04 Institution: School of Sustainable Development of Society and Technology Course: Bachelor Thesis, 15 hp Examiner: Cecilia Lindh Keywords: Audit requirement, review, auditor, tasks, Germany The main issues: 1 November 2010 a new law in force relating to the abolition of the audit requirement in Sweden. The Swedish companies, can after this date, freely choose whether they want to audit or not. When the framework around the auditors change, they must change to adapt to the new ground rules to ensure that they stay as efficient and as effective as possible. Germany has in the current situation a system where smaller companies do not have to revise their accounts; it takes place entirely on a voluntary basis. Sweden and Germany has its roots in continental accounting tradition, whereas Germany can be regarded as a leading country of Sweden. Purpose: The purpose of this paper is to examine how auditors believe that their tasks will change after the abolition of the audit requirement. The aim is also to draw parallels with the German development of the tasks of auditors to examine whether it can provide a picture of the future Swedish development. We will identify stakeholders who are likely to influence the development of auditors' work. Method: The study is qualitative in nature in which interviews with auditors has been conducted to obtain a better understanding of the problem. This study was conducted through interviews in both Sweden and Germany. Conclusions: One conclusion we can draw is that the Swedish auditors believe that their work will evolve in the direction of advisory and consultancy services. Another conclusion we can draw is that the Swedish auditors believe that stakeholders such as creditors, suppliers, other businesses and the Treasury, will influence their future task

Att förändra sin livsstil genom Fysisk aktivitet på Recept

Syftet med studien var att undersöka vad det innebär för den enskilda individen att få fysisk aktivitet på recept (FaR), samt om deltagande i en FaR-grupp stimulerar till självständig fysisk aktivitet. Även vad som gör att individerna utnyttjar sina recept samt hur beteendeförändringen, att bli fysiskt aktiv, upplevs har undersökts. Fysisk aktivitet på recept innebär att man ordinerar fysisk aktivitet i syfte att förebygga och behandla sjukdomar. Studien genomfördes under våren 2006. Tio deltagare i FaR-grupper remitterade till en idrottsförening från en vårdcentral i Skåne och de tre ledarna för grupperna intervjuades. Resultaten visar att deltagarnas upplevelser är övervägande positiva. Att få FaR har inneburit mer regelbunden motion än tidigare för deltagarna och de har upptäckt fördelar med att vara fysiskt aktiva. I FaR-gruppen finns både faktorer som främjar och hindrar självständig fysisk aktivitet. Förslag till förbättringar av projektet för mer varaktiga livsstilsförändringar är att arbeta mer med tankeprocesser, föra in begreppet vardagsmotion och ge möjlighet till fler aktiviteter

Konsten att aktivera det kollektiva minnet - Arkivens potential för att utöva pedagogisk verksamhet

Syftet med vår uppsats är att utreda den pedagogiska potentialen i olika typer av arkiv. Vi undersöker hur och om arkiven kan bli en pedagogisk resurs samt hur arkiven tillgängliggör sig gentemot skolan. Med hjälp av arkivens styrdokument och intervjuer analyserar vi och jämför det pedagogiska arbetet och satsningarna hos arkiven. Begreppet historiemedvetande spelar en central roll i uppsatsen och i undersökningen analyseras och redogörs för hur arkivarierna och arkivpedagogerna ser på begreppet historiemedvetande. Vidare refereras och diskuteras den aktuella debatten kring detta centrala begrepp och dess roll i gällande kursplaner och läroplan. Utifrån vår kvalitativa undersökning har vi funnit att samtliga arkiv har en vilja att bedriva en arkivpedagogisk verksamhet, men för att i längden bedriva en fungerande arkivpedagogisk verksamhet krävs särskilda projektstöd upprättade för ändamålet samt en ökad samverkan mellan arkiven, museerna och biblioteken. För att utveckla samarbetet med skolan föreslås en ökad användning av lärare, efter mönster från Tyskland och Storbritannien, som pedagogisk resurs inom arkivpedagogiken.The purpose with this thesis is to investigate the potential within archives concerning educational practice. We look at how the archives present themselves and make themselves available towards pupils and teachers. Our analysis is based on interviews using a qualitative method and also policy documents from four different types of archives in Sweden. An important part in this thesis is the concept, historical consciousness. We investigate how educational practice within archives could develop pupils historical consciousness. Our investigation reveals that our chosen archives wants to develop their educational practice towards schools, but to be able to do so they need financial support and increased cooperation between archives, museums and libraries. To develop their cooperation with schools we propose that the archives should employ teachers as a resource for pedagogical purpose