Experimental study of strain fields during shearing of medium and high-strength steel sheet

There is a shortage of experimentally determined strains during sheet metal shearing. These kinds of data are a requisite to validate shearing models and to simulate the shearing process. In this work, strain fields were continuously measured during shearing of a medium and a high strength steel sheet, using digital image correlation. Preliminary studies based on finite element simulations, suggested that the effective surface strains are a good approximation of the bulk strains below the surface. The experiments were performed in a symmetric set-up with large stiffness and stable tool clearances, using various combinations of tool clearance and clamping configuration. Due to large deformations, strains were measured from images captured in a series of steps from shearing start to final fracture. Both the Cauchy and Hencky strain measures were considered, but the difference between these were found negligible with the number of increments used (about 20 to 50). Force-displacement curves were also determined for the various experimental conditions. The measured strain fields displayed a thin band of large strain between the tool edges. Shearing with two clamps resulted in a symmetric strain band whereas there was an extended area with large strains around the tool at the unclamped side when shearing with one clamp. Furthermore, one or two cracks were visible on most of the samples close to the tool edges well before final fracture. The fracture strain was larger for the medium strength material compared with the high-strength material and increased with increasing clearance.

Non-challenging education and teacher control as factors for marginalization of students in diverse settings

This article discusses teachers’ attitudes towards immigrant students in poor settings and the effect these attitudes have on organization of education on classroom level. It draws on results from two ethnographic studies where some primary school classes in Sweden were followed with participant observation and interviews as main research methods. The article focuses on classroom activities and teachers’ attitudes towards immigrant students and students with low socio-economic status. In the article is argued for the importance of presenting students in poor settings with demanding tasks and challenging education. In these cases, intellectually undemanding tasks in combination with little room for students’ own initiatives resulted in low enthusiasm among students regarding schoolwork and accordingly low learning, while classroom work that demanded active involvement by students in combination with high level of students’ influence on what took place in classrooms resulted in high level of students’ engagement and high outcome.

Adolescent boys’ health : managing emotions, masculinities and subjective social status

The health of adolescent boys is complex and surprisingly little is known about how adolescent boys perceive, conceptualise and experience their health. Thus, the overall aim of this thesis was to explore adolescent boys’ perceptions and experiences of health, emotions, masculinity and subjective social status (SSS). This thesis consists of a qualitative, a quantitative and a mixed methods study. The qualitative study aimed to explore how adolescent boys understand the concept of health and what they find important for its achievement. Furthermore, the adolescent boys’ views of masculinity, emotion management and their potential effects on wellbeing were explored. For this purpose, individual interviews were conducted with 33 adolescent boys aged 16-17 years. The quantitative study aimed to investigate the associations between pride, shame and health in adolescence. Data were collected through a cross-sectional postal survey with 705 adolescents. The purpose of the mixed methods study was to investigate associations between SSS in school, socioeconomic status (SES) and self-rated health (SRH), and to explore the concept of SSS in school. Cross-sectional data were combined with interview data in which the meaning of SSS was further explored. Individual interviews with 35 adolescents aged 17-18 years were conducted. In the qualitative study, data were analysed using Grounded Theory. In the quantitative study, statistical analyses (e.g., chi-square test and uni- and multivariable logistic regression analyses) were performed. In the mixed method study, a combination of statistical analyses and thematic network analysis was applied. The results showed that there was a complexity in how the adolescent boys viewed, experienced, dealt with and valued health. On a conceptual level, they perceived health as holistic but when dealing with difficult emotions, they were prone to separate the body from the mind. Thus, the adolescent boys experienced a difference between health as a concept and health as an experience (paper I). Concerning emotional orientation in masculinity, two main categories of masculine conceptions were identified: a gender-normative masculinity and a non-gender-normative masculinity (paper II). Gender-normative masculinity comprised two seemingly opposite emotional masculinity orientations, one towards toughness and the other towards sensitivity, both of which were highly influenced by contextual and situational group norms and demands, despite that their expressions are in contrast to each other. Non-gender-normative masculinity included an orientation towards sincerity, emphasising the personal values of the boys. Emotions were expressed more independently of peer group norms. The findings suggest that different masculinities and the expression of emotions are intricately intertwined and that managing emotions is vital for wellbeing. The present findings also showed that both shame and pride were significantly associated with SRH, and furthermore, that there seems to be a protective effect of experiencing pride for health (paper III). The results also demonstrated that SSS is strongly related to SRH, and high SRH is related to high SSS, and further that the positioning was done in a gendered space (paper IV). Results from all studies suggest that the emotional and relational aspects, as well as perceived SSS, were strongly related to SRH. Positive emotions, trustful relationships and having a sense of belonging were important factors for health and pride was an important emotion protecting health. Physical health, on the other hand, had a more subordinated value, but the body was experienced as an important tool to achieve health. Even though health was mainly perceived in a holistic manner by the boys, there were boys who were prone to dichotomise the health experience into a mind-body dualism when having to deal with difficult emotions. In conclusion, this thesis demonstrates that young, masculine health is largely experienced through emotions and relationships between individuals and their contexts affected by gendered practices. Health is to feel and function well in mind and body and to have trusting relationships. The results support theories on health as a social construction of interconnected processes. Having confidence in self-esteem, access to trustful relationships and the courage to resist traditional masculine norms while still reinforcing and maintaining social status are all conducive to good health. Researchers as well as professionals need to consider the complexity of adolescent boys’ health in which norms, values, relationships and gender form its social determinants. Those working with young boys should encourage them to integrate physical, social and emotional aspects of health into an interconnected and holistic experience.

L’image comme outil didactique dans l’enseignement du français dans des collèges et des lycées en Suède

Le travail actuel a été rédigé dans le but d’éclaircir en quoi consiste le rôle de l’image comme outil didactique aux cours de français aux collèges et aux lycées suédois. Nous avons abordé notre thème sous des perspectives différentes : d’un côté, nous avons analysé les images dans deux livres, puisque les manuels font souvent partie de chaque leçon de français ; de l’autre côté, nous avons fait un questionnaire que nous avons distribué aux professeurs à travers les médias sociaux et par email. Nous avons également étudié les données récoltées aux cours des entretiens avec trois professeurs de français au lycée suédois, pour savoir comment les professeurs intègrent des images dans la pratique. Selon les résultats de notre étude, il nous a été possible d’affirmer que l’image est un outil qui n’est pas omniprésent, mais qui est parfois utilisé afin de rendre les leçons plus variées. La photographie est le type d’image le plus répandu dans la pratique des professeurs et dans les manuels ; le format numérique est le plus fréquent en tenant en compte de la révolution technologique et de l’habitude des jeunes à travailler avec les ordinateurs. Cependant, l’image n’est pas un outil indépendant. Elle est très souvent complétée par d’autres outils didactiques et sert principalement à accompagner la lecture, à développer l’expression orale et le vocabulaire et aussi à illustrer des phénomènes culturels. En conclusion, il ressort de notre mémoire, qu’il est important que le professeur accompagne le travail avec des images avec des instructions et des commentaires, afin de rendre l’apprentissage plus efficace.

”Vi kan vistas i samma rum men jag tänker inte prata med dig” : Religionskunskapslärares tolkning av begreppet tolerans samt dess betydelse och funktion i undervisningen

This is a qualitative interview study aiming to examine the concept of tolerance as it is a core value in the curriculum for the Swedish upper secondary school and high school. The concept of tolerance is linked to the subject of religious studies. A total of six teachers were interviewed regarding their understanding and interpretation of the concept, as well as its place in their teaching. The method of analysis was hermeneutic and the statements made by the teachers were further analyzed in the light of normcritical pedagogy and didactical awareness. The results show a diversified understanding of the concept, manifested in a broad scale of attitudes to it, ranging from negative to positive, though all were based on a reflective approach. This affected the teachers' tendency to include, or focus on, the concept of tolerance in their teaching, varying from active inclusion to exclusion. The discussion focuses on the differences and difficulties associated with acts of tolerance versus attitudes of tolerance. The teachers define religious studies as a subject with heavy focus on interpersonal relations. Acts of tolerance are therefore problematic as they are also acts of power between individuals and groups. This shows the didactical importance of discussing the concept of tolerance, mainly in relation to attitudes and acts, between teachers as well as in the classroom.