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Kirjallisuusarvostelu

The Genome Sequence of Taurine Cattle: A Window to Ruminant Biology and Evolution

To understand the biology and evolution of ruminants, the cattle genome was sequenced to about sevenfold coverage. The cattle genome contains a minimum of 22,000 genes, with a core set of 14,345 orthologs shared among seven mammalian species of which 1217 are absent or undetected in noneutherian (marsupial or monotreme) genomes. Cattle-specific evolutionary breakpoint regions in chromosomes have a higher density of segmental duplications, enrichment of repetitive elements, and species-specific variations in genes associated with lactation and immune responsiveness. Genes involved in metabolism are generally highly conserved, although five metabolic genes are deleted or extensively diverged from their human orthologs. The cattle genome sequence thus provides a resource for understanding mammalian evolution and accelerating livestock genetic improvement for milk and meat production.

Interpersonal understanding and theory of mind

En populär idé inom dagens filosofiska och psykologiska forskning om interpersonlig förståelse, är idén att vi använder en kognitiv funktion (eller metod) för att förstå andra människor, en så kallad ”theory of mind” funktion. Denna idé förekommer inom ett brett vetenskapligt fält så som inom evolutionspsykologi, inom teorier om barns utveckling, inom teorier om autism, samt inom emotionsfilosofi och moralfilosofi. Avsikten i denna studie är att se närmare på vissa inflytelserika filosofiska och psykologiska teorier om interpersonlig förståelse, teorier som också har en stark koppling till empirisk forskning. I arbetet hävdar Gustafsson att teorierna ifråga avspeglar vissa klassiska, filosofiskt problematiska, antaganden. Dessa antaganden präglar teorierna ifråga samt påverkar hur de empiriska undersökningarna byggs upp och hur resultat tolkas.

Navigating the labyrinth: a guide to sequence-based, community ecology of arbuscular mycorrhizal fungi

Data generated from next generation sequencing (NGS) will soon comprise the majority of information about arbuscular mycorrhizal fungal (AMF) communities. Although these approaches give deeper insight, analysing NGS data involves decisions that can significantly affect results and conclusions. This is particularly true for AMF community studies, because much remains to be known about their basic biology and genetics. During a workshop in 2013, representatives from seven research groups using NGS for AMF community ecology gathered to discuss common challenges and directions for future research. Our goal was to improve the quality and accessibility of NGS data for the AMF research community. Discussions spanned sampling design, sample preservation, sequencing, bioinformatics and data archiving. With concrete examples we demonstrated how different approaches can significantly alter analysis outcomes. Failure to consider the consequences of these decisions may compound bias introduced at each step along the workflow. The products of these discussions have been summarized in this paper in order to serve as a guide for any researcher undertaking NGS sequencing of AMF communities.

Inlärning och öppet-fält aktivitet hos förskolebarn

The purpose of this study was to analyze the impact of learning on open-field activity among pre-school children varying from 3 to 5 years old. Altogether 25 children, 13 girls and 12 boys, entered the test from three different preschools in Dalarna. Six of these children represented the control group. The children were asked to learn 2 tasks, 1 visual memory task and 1 spatial constructing-kit task. Before, between and after the tasks, the children were allowed to move freely in the open field. The control group did not solve any learning tasks and only entered the open field, which was divided into 18 equally large squares, where the children’s activities were observed. The children’s learning times as well as their spontaneous open-field activity and wall-seeking behaviour were registered. The result showed as a general rule that the learning time was reduced between each session. However, the visual memory task increased the children’s spontaneous open-field behaviour more and decreased their wall seeking to a greater extent than the spatial-construction learning task.

Utveckling av bestrykning för papper avsedda för bläckstråleskrivare

Detta examensarbete har utförts på papperstillverkaren Arjo Wiggins’ forskningscenter i Beaconsfield,England. Företaget har planer på att börja tillverka en ny papperskvalitet för bläckstråleskrivare, varförsyftet med arbetet har varit att testa och utvärdera olika sammansättningar av kemikalier som lämparsig för bestrykning av bläckstrålepapper.Ett stort antal bestrykningar har testats med varierande resultat. Det svåraste har visat sig vara attnå en tillräckligt hög grad av vattenhållfasthet. Resultaten förbättrades något då baspapperetbyttes från ett limmat och kalandrerat papper till ett olimmat, okalandrerat papper. I övrigt visade sigbindemedlen ha större påverkan på bestrykningens egenskaper än pigmenten. Utskriftskvaliteten haröverlag varit god.

Kvinnors upplevelse av sitt värkarbete under planerad hemförlossning

Bakgrund: I Sverige genomförs ca 100 hemförlossningar varje år. I förlossningsprocessen har upplevelsen av värkarbetet stor betydelse för upplevelsen av förlossningen i helhet. Dock finns få studier som belyser upplevelsen av värkarbete, vare sig vid sjukhusförlossningar eller vid planerade hemförlossningar. Syfte: Att beskriva hur kvinnor upplever sitt värkarbete vid en planerad hemförlossning.Metod: Arbetsmaterialet utgjordes av 72 stycken nedskrivna beskrivningar rörande hemförlossningar. Materialet var slumpmässigt utvalt ur en större, redan genomförd studie där kvinnor som varit med om en planerad hemförlossning mellan den1 januari 1992 och den 31 juli 2005 deltog. Dessa förlossningsbeskrivningar analyserades med hjälp av kvalitativ innehållsanalys med en induktiv ansats.Resultat: Fyra kategorier kom att identifieras: (1) kroppsliga upplevelser; (2) trygghet; (3) kontroll samt (4) utsatthet. Det i särklass mest entydiga resultatet är den trygghet kvinnor upplever relaterat till stöd från andra personer, i synnerhet barnmorskan.Slutsats: De flesta kvinnor som föder hemma upplever att de har kontroll och känner sig trygga under värkarbetet i hemförlossningssituationen. Tryggheten beror i stor utsträckning på det stöd som barnmorskan och kvinnans partner tillhandahåller. Dock behövs mer kunskap inom området, speciellt kunskap där upplevelsen av värkarbetet med mer tydlighet undersöks.

A dislocation based theory for the deformation hardening behavior of DP steels : Impact of martensite content and ferrite grain size

A dislocation model, accurately describing the uniaxial plastic stress-strain behavior of dual phase (DP) steels, is proposed and the impact of martensite content and ferrite grain size in four commercially produced DP steels is analyzed. It is assumed that the plastic deformation process is localized to the ferrite. This is taken into account by introducing a non-homogeneity parameter, f(e), that specifies the volume fraction of ferrite taking active part in the plastic deformation process. It is found that the larger the martensite content the smaller the initial volume fraction of active ferrite which yields a higher initial deformation hardening rate. This explains the high energy absorbing capacity of DP steels with high volume fractions of martensite. Further, the effect of ferrite grain size strengthening in DP steels is important. The flow stress grain size sensitivity for DP steels is observed to be 7 times larger than that for single phase ferrite.

Föreställningar om klass och kön i Arbetsförmedlingens yrkesbeskrivningar?

Notions of Class and Gender in the Employment Service Job Descriptions This article examines whether job descriptions emphasize different characteristics and competences depending on the occupations’ social class and gender relations. The study is partly a replication of a similar analysis conducted by Gesser in the 1970s. The purpose is to examine the prevalence of stereotypes in occupational descriptions provided by the Swedish state, and if the descriptions contribute to class and gender labeling of occupations and, by extension, its practitioners. Previous research has shown that career guiding materials are characterized by notions of the appropriate practitioner’s class and gender. In this study we depart from the concept of doxa and argue that stereotypical images of occupations are based on common sense that remains unquestioned. The study draws on a quantitative content analysis of 420 job descriptions analyzed by various statistical methods. The overall results show that there are systematic differences. In general, social class seems to have greater impact than gender on what kind of competences that are emphasized in the descriptions. Social skills are emphasized in female dominated occupations, while physical abilities are highlighted in male-dominated occupations. To some extent, these results are uncontroversial, as it also portraits abilities necessary to do the work in different kind of occupations