Este estudo teve como objetivo verificar como ocorre e se desenvolve a construção dos conceitos acerca da estrutura da matéria e quais as dificuldades envolvidas nesse processo de aprendizagem. Para esta finalidade foi realizado um estudo longitudinal com um grupo de alunos ao longo do ensino médio. O estudo apresenta a análise do desenvolvimento conceitual desses estudantes, ao manifestarem explicações sobre fenômenos do seu cotidiano, utilizando ideias sobre a estrutura da matéria. Foram empregadas três dimensões de análise: natureza corpuscular da matéria (1ª dimensão), natureza elétrica da matéria (2ª dimensão) e interações intra e interpartículas (3ª dimensão). O estudo foi dividido em duas etapas. Na primeira etapa, participaram 91 alunos de 1ª a 3ª séries de uma escola de Ensino Médio de São Paulo, cujo ensino esteve a cargo de uma mesma professora. A compreensão dos conceitos acerca da estrutura da matéria foi extraída de suas respostas a um questionário contendo questões abertas e fechadas. O conhecimento dos alunos foi avaliado considerando suas respostas em níveis de adequação e compreensão elaborados a partir de uma comparação com respostas de professores especialistas na área de química e de ensino ao mesmo questionário. Verificou-se que as respostas dos alunos se apresentaram entre os níveis de inadequação e parcial adequação com vaga à alguma compreensão na 1ª dimensão de análise para todas as séries. Na 2ª dimensão de análise as respostas foram inadequadas com insuficiente compreensão, entre os alunos da 1ª série, inadequadas com vaga compreensão entre os alunos da 2ª e 3ª séries. Na 3ª dimensão, as respostas foram inadequadas, com insuficiente compreensão entre os alunos das 1ª e 3ª séries, o que implica em avanços e retrocessos do conhecimento dos conceitos e, para a 2ª série, as respostas foram inadequadas com vaga compreensão. Na segunda etapa do estudo, foram acompanhados quatro alunos (A, B, C e D) durante os três anos do Ensino Médio. O conhecimento individual de cada aluno foi extraído de suas respostas a questionários, entrevistas e representações pictóricas. O desenvolvimento conceitual de cada aluno foi avaliado por meio da elaboração de mapas cognitivos a partir de suas manifestações verbais e escritas. Os resultados indicaram que dois dos estudantes desenvolveram uma compreensão gradual dos conceitos acerca da estrutura da matéria, um deles finalizou o ensino com vaga compreensão (A), outro com alguma compreensão (D) e dois deles alcançaram bom nível de compreensão (B e C), estes últimos parecem ter integrado de maneira mais coesa seus conhecimentos, o que indicou que reestruturaram e reorganizaram suas estruturas de conhecimento. O estudo sugere que é necessária uma retomada constante dos conceitos sobre estrutura da matéria, possibilitando ao aluno estabelecer inter-relações conceituais na explicação de fenômenos, de maneira a facilitar uma reestruturação das concepções dos estudantes, tornando a aprendizagem mais significativa. / This study aims to investigate how High School students understand and develop concepts related to structure of matter and how they apply these concepts to explain everyday phenomena related to Chemistry. For this purpose, we conducted a longitudinal study with 91 High School students from 2012 to 2014. The conceptual development of these students was investigated by analyzing their answers to a questionnaire applied in the beginning of the 1st and 2nd grades and in the end of the 3rd grade of High School. In addition, four students were chosen to answer to five interviews conducted over the three years of High School. The students had the same Chemistry teacher in these three years. Students\' answers were categorized in three dimensions of analysis elaborated by the researcher: particle model of matter (1st dimension), electrical nature of matter (2nd dimension) and intra- and inter-particle interactions (3rd dimension). The analyses were conducted in two steps. In the first step, the concepts expressed by the 91 students were analyzed according to the three dimensions. Adequacy and comprehension levels were created to categorize students\' responses. These levels were elaborated by comparing students\' answers to Chemistry experts\' answers. The second step consisted of analysis of each of four students (A, B, C, D) during learning process on 1st, 2nd and 3rd grades of High School. The concept development of each student was evaluated through cognitive maps elaborated by the researcher from student\'s verbal and written manifestations. On the first step, concerning to the 1st dimension of analysis, the students on the three grades showed answers classified in inadequacy and partial adequacy levels, and low comprehension level. For the 2nd dimension, 1st graders\' ideas were classified as inadequate with insufficient understanding, the students of 2nd and 3rd grades showed a low level of understanding. On the 3rd dimension, the answers given by students of the 1st and 3rd grades were classified as inadequate, with insufficient understanding. The responses of 2nd grade students were also inadequate but with a little better level of understanding. On the second step, results indicated that students A and D developed a gradual understanding of the concepts concerning the structure of matter. Although, student A has achieved a low level of comprehension, student D has achieved the level of some comprehension. Students B and C achieved good level of understanding and their concepts seem to be closely integrated, which indicates that they have restructured and reorganized their knowledge structures. In conclusion, this study suggests that concepts related to structure of matter should be frequently reviewed in order to enable the student to establish conceptual interrelationships to explain phenomena at sub-microscope level, promote students\' conceptions restructuration, and provide meaningful learning during the teaching-learning process.

Introdução: Mudanças na composição corporal de indivíduos podem fornecer indícios importantes sobre a saúde individual e coletiva. Objetivo: Identificar mudanças na estatura e gordura corporal em crianças de 7 a 10 anos. Métodos: Foram utilizados dados de três coortes de nascimento de escolares da Escola de Aplicação da USP, mensurados duas vezes ao ano, no período de 2005 a 2008. Foram avaliados a estatura, o peso e pregas cutâneas (tricipital, bicipital, suprailíaca e subescapular). Resultados: O estudo teve início com 161 escolares com 7, 8 e 9 anos e terminou com 37 escolares com 10 anos. Neste estudo, não foi verificada existência de efeito de coorte. Agregando-se os participantes nas idades de 7, 8, 9 e 10 anos, tem-se que foram acompanhados no período de 4 anos, 457 escolares. Observou-se aumento da estatura com a idade, seguindo um padrão linear, com taxas diferentes de crescimento médio para meninos e meninas (em média 5,4 cm e 6,4 cm ao ano, respectivamente); Observou-se ganho médio de peso igual a 4,4 kg ao ano e diferenças entre os sexos, com meninos apresentado 2,4 kg a mais que meninas para cada idade; Observou-se aumento do tecido adiposo tanto pela soma das pregas cutâneas como pela prega cutânea tricipital com aumento médio de 7,0 mm e 2,3 mm ao ano, respectivamente. Conclusão: Conclui-se que, crianças de coortes mais recentes alcançam estatura, peso e soma de pregas cutâneas de crianças de coortes anteriores, não indicando efeito de coorte. Crianças de 7 a 10 anos apresentam crescimento linear na faixa etária, com valores médios maiores para meninas. O ganho de peso vem acompanhado do acúmulo de tecido adiposo, indicando ganho de gordura corporal / Introduction: Changes in body composition of individuals may provide important clues about individual and collective health. Objective: To identify changes in height and body fat in 7-10 year-old children. Methods: Data from three cohorts of students from Escola de Aplicação, University of São Paulo. Height, weight and skinfolds (triceps, biceps, suprailiac and subscapular) were measured twice a year and assessed. Results: At baseline 161 students aged 7, 8 and 9 years were enrolled. At the end, there were 37 10-year-old students. In this study, there was no cohort effect. Altogether, 457 students were followed for 4 years (7, 8, 9 and 10-year-old participants), who contributed with more than one measurement of each variable. Height increased with age following a linear pattern, with different growth rates when boys and girls are compared (on average 5.4 cm and 6.4 cm per year, respectively). Mean weight gain was 4.4 kg per year, with significant differences between genders (boys were 2.4 kg heavier than girls at each age). Adipose tissue increased when assessed through sum of skinfolds and tricipital skinfold, with mean increases of 7.0mm and 2.3mm per year. Conclusion: Given the results, it seems that 7 to 10 yearold schoolchildren of both sexes exhibit linear physical growth as regards to height, weight and body fat accumulation

This is a longitudinal study that aimed to explore the planning and preparation, and experiences of post-school transition of young people with learning disabilities in both, mainstream and special schools within one local authority in Scotland. Data were drawn from semi-structured interviews with the young people, parents and professionals, and also from questionnaire with parents, at three different stages, covering a period from the final year at school, up to the first year at college. In addition, observation was undertaken of two review meetings in one special school. The results found that despite all young people’s post-school destination being college, they went through a variety of experiences, suggesting that a different approach needs to be taken to planning and preparation to ensure a smooth and seamless transition. The study revealed that despite many improvements, there was still a lack of information about the post-school provisions for the young people among the school staff and other professionals. The study proposes that the role of parents is as important as the role of the school staff. The study also makes some recommendations for future research, policy and practice.

AIM: To examine associations of prenatal maternal smoking and second-hand smoke (SHS) exposure with the development of adolescent obesity. METHODS: Longitudinal data (1991-2007) from National Institute of Child Health and Human Development Study of Early Child Care and Youth Development involving mothers that smoked and or exposed to SHS during the year before birth were analysed. Adolescent obesity in ages 12.0-15.9 years was defined as a BMI ≥ 95th percentile. Generalised estimating equations (GEE) were used for the analyses. RESULTS: Obesity was more prevalent among adolescents whose mothers smoked or had SHS exposure than those that did not smoke or exposed to SHS. After adjusting for maternal and child factors, GEE models showed that odds of adolescent obesity increased with prenatal maternal smoking (OR = 1.57, 95% CI = 1.03-2.39) and SHS exposure (OR = 1.53, 95% CI = 1.04-2.27). The odds for obesity increased more than two times among adolescents exposed to both maternal smoking and SHS (OR = 2.10, 95% CI = 1.24, 3.56) compared with those without exposure. Additionally, not breastfeeding, maternal obesity, and longer screen viewing hours per day were associated with increased odds of obesity. CONCLUSIONS: There is possibly a long-term joint effect of prenatal maternal smoke (smoking and SHS) exposure on obesity among adolescent offspring, and the effect is independent of birthweight. These findings suggest that adolescent obesity could possibly be curtailed with the development and promotion of smoking cessation programmes for families during the year before birth.

The present research provides the first analyses of Australian women directors from the perspective of social identity theory. The overall objective of the research program is to confirm the validity of social identity theory to the study of women on corporate boards and in doing so, add to the limited knowledge regarding successful women directors. An aim of the research was to identify factors that are significant in the social identity of women who are successful directors of corporate boards. These factors were revealed through a longitudinal study (over six years) of changes in the demographic characteristics of the women and their board positions. Factors were revealed through their perceptions of their effectiveness as an ostensibly minority (female) board member. Similarities in stereotyped attitudes to men and women board directors confirmed their status as an ingroup member. Through identification of significant factors in women’s success as board directors it is hoped to assist both individual women who are striving for success on corporate boards and organisations who wish to make more effective use of women on their boards. Five studies examined various aspects of women directors’ experiences and influences through three survey instruments that were used to collect data over a period of six years. A survey design allowed the gathering of detailed data on a variety of items thought to be relevant to women’s experiences of being directors and allowed the data collected to be oriented to a theoretical framework. Thus, a survey design was deemed superior to common alternatives of analysis of archival company annual report data or re-analysis of data collected by executive search companies for a study of corporate directors. A survey of 572 Australian women directors in 1995 identified many characteristics of women directors. A profile of a typical Australian women director was constructed and compared to international research on women directors covering a similar period (e.g., Burke, 1994b; Catalyst, 1993; Holton, Rabbets & Scrivener, 1993). An examination of differences between the characteristics of executive and nonexecutive women directors confirmed that the two director roles could be perceived as distinct groups. A further survey of the women six years later examined changes in their characteristics and board experiences. Of the 298 women who had agreed to follow-up research, 59 surveys were returned as no longer at the same address, 23 women indicated that they were no longer on a corporate board, and 32 were current corporate directors. Changes in the women’s profiles that the directors had attained through increased board memberships and more central board roles were interpreted as indicators of success. Based on research by Cejka and Eagly (1999), similarities and differences in stereotypical attitudes of men and women directors were examined in relation to social identity theory. Factors in nonexecutive women directors’ identification as board directors, their perceptions of their ability to contribute as board directors, and their behaviour as a board directors were assessed by measures from Karasawa (1991) and Westphal and Milton (2000). The present research program demonstrated the value of social identity theory as a vehicle for understanding Australian women director’s experiences on corporate boards. For the present research, social identity theory provided insights into how successful Australian women directors perceive themselves and other members of their ingroup of board directors. By contributing to a deeper understanding of successful women directors, it is hoped that a greater number of women will be able to successfully join ingroups of board directors, thereby breaking down the barriers to women.

Background Cataract surgery is the most common surgical procedure carried out in the developed world and surgery volumes have increased considerably during the last decades. Various aspects of the surgical procedure, including surgical incision size and intraocular lens materials, have changed substantially, improving the safety and the quality of the outcome. Previous research has primarily focused on the visual function results with a short follow-up time. Long-term population-based studies, exceeding a few years, presenting visual functional results postoperatively, have not been published. Aims To determine the effects of cataract surgery on subjectively experienced visual function and visual acuity in a defined population, and compare the results between sub-groups, on a long-term basis. Methods In this prospective, population-based investigation, all patients with presenile and senile cataract (n=810), operated on during a one-year period (1997-98), at Umeå University Hospital were included. The frequency of cataract surgery at that time, was 5.2 per 1000 population studied. Visual acuity was tested and an eye examination was performed before surgery, 4-8 weeks postoperatively, and five and ten years after surgery. Subjective visual function was assessed using self-administered questionnaires (VF-14) at all occasions. Statistical evaluations comprised analyses of variance, Mann-Whitney U-test, chi-square test, multiple linear regression, a life-table calculation, and Cox’s proportional hazard model. Results Five years after cataract surgery, subjective and objective visual function remained stable in most patients. The most frequent cause of deterioration of visual acuity and decrease in VF-14 scores was agerelated macular degeneration (ARMD). Two thirds of the patients in the cohort were women. They were significantly older than the men and more often operated on both eyes. After adjustment for age and visual acuity, women cataract surgery patients assessed their visual function worse than men both before surgery and 4 months postoperatively. Five years after surgery these differences were no longer significant. At baseline, 13% of the patients were diabetics. At the five-year followup, subjective and objective visual function remained stable in most surviving diabetics, and the longitudinal visual function was not significantly worse compared with the non-diabetics. Ten years after surgery, 28% had received treatment for posterior capsular opacification (PCO). A significantly larger proportion of patients less than 65 years at surgery (37%) compared with those 65 years or older (20%) had been treated. Conclusions Most patients sustain their level of visual acuity and visual function also five and ten years after cataract surgery. Ocular co-morbidity, such as ARMD, is the major cause of longitudinally reduced visual function. Patients suffering from diabetes did not have a significantly worse visual function after five years. A surprisingly large proportion of patients had received treatment for PCO after ten years.

Increasingly, computer and Internet usage play a vital role in connecting individuals to the larger society. Many factors may influence computer ownership and frequency of Internet usage by retired older adults. This thesis applies two theoretical frameworks, Cumulative Inequality theory and Intergenerational Solidarity theory, to explore major factors that may influence retired older adults' computer ownership and their frequency of Internet usage. Special attention will be paid to issues of social inequality: including retirement status (respondent and spouse), availability of an employer-paid pension (respondent and spouse), accumulated wealth, income, educational attainment, and employer-paid health insurance (respondent and spouse). In addition, this thesis will explore issues of intergenerational solidarity, specifically, number of children and number of children living in the household in relation to computer ownership and Internet usage, in particular. This study uses the Wisconsin Longitudinal Study (WLS) data that were collected through phone surveys that were conducted in 2004.

Die vorliegende Arbeit betrachtet Partizipation aus einer interaktionalen Perspektive und nimmt zunächst eine interdisziplinär orientierte Begriffsbestimmung vor. Daran anschließend werden anhand einer Längsschnittstudie Entwicklungsbedingungen sozialer Partizipationskompetenzen im Vorschulalter untersucht und Förderempfehlungen abgeleitet. Partizipation (Teilhabe) soll in Kontexten wie Schule oder Arbeitswelt Entscheidungen demokratisch legitimieren, individuelle Ressourcen ausschöpfen und soziale Grundbedürfnisse des Menschen befriedigen. Ein engeres Verständnis von sozialer Partizipation aus einer interaktionalen Perspektive erfordert die Beteiligung an den Aktivitäten einer bereits bestehenden Gruppe und die Aushandlung eigener Interessen innerhalb dieser Gruppe und wird in der Arbeit als Prozess anhand dreier Phasen (Anbahnung, Projektierung und Realisierung) dargestellt. Im Vorschulalter werden wichtige Grundsteine für eine erfolgreiche soziale Entwicklung und für den Erwerb von sozialen Partizipationskompetenzen gelegt. In der vorliegenden Arbeit wurden deshalb die Zusammenhänge und Wechselwirkungen zwischen sozialen Partizipationskompetenzen (Bereitschaft und Fähigkeit) und (1) kognitiven Leistungsparametern (Intelligenz und Perspektivenübernahme), (2) dem Selbstkonzept und (3) dem Konfliktverhalten (Aggression und Schüchternheit) mit 5- bis 7jährigen Kindern mit Hilfe von Kreuzpfadanalysen untersucht. Zudem wurde die Situationsgebundenheit sozialer Partizipationskompetenzen und die Bedeutung struktureller Parameter der Familie und der Kindertageseinrichtung auf explorativer Ebene analysiert. Die Stichprobe bestand aus 334 Kindern (51,5 % weiblich, Altersdurchschnitt zum ersten Messzeitpunkt 5,4 Jahre) in 71 Kindergartengruppen in 21 Kindertageseinrichtungen in vier Bundesländern. Die längsschnittliche Datenanalyse basiert auf drei Messzeitpunkten. Die Ergebnisse zeigen, dass soziale Partizipationskompetenzen über verschiedene Situationen hinweg bedeutsame, aber nur mäßig ausgeprägte, Zusammenhänge aufweisen. Hohe Ausprägungen kognitiver Leistungsparameter gehen mit hohen Erziehereinschätzungen sozialer Partizipationskompetenzen einher. Über die Zusammenhänge hinaus zeigen sich im Längsschnitt bedeutsame Wechselwirkungen zwischen kognitiver Entwicklung und sozialen Partizipationskompetenzen im Vorschulalter. Selbsteinschätzungen zur eigenen Kompetenz hängen im Vorschulalter hingegen nur gering mit Erziehereinschätzungen der sozialen Partizipationskompetenz zusammen. Im Längsschnitt zeigt sich, dass junge Kinder bei der Beurteilung ihrer Kompetenzen zunächst auf soziale Partizipationserfolge zurückgreifen. Später hingegen scheint der Partizipationserfolg dann umgekehrt eher durch das Selbstbild bedingt zu sein. Geringe Partizipationskompetenzen gehen mit hohen Erziehereinschätzungen beim aggressiven (schwach signifikant) und schüchternen Verhalten (mäßig signifikant) einher. Hinsichtlich der Aggression und des schüchternen Verhaltens ergaben sich längsschnittlich betrachtet nur schwache Wechselwirkungen zur sozialen Partizipationskompetenz. Die Kumulation familiärer Belastungssituationen (z.B. Krankheit und akute Finanznot) stellen eine größere Bedrohung für die kindliche Entwicklung dar als der sozio-ökonomische Status der Familie. Mit Blick auf die Förderung sozialer Partizipationskompetenzen lassen sich die Ergebnisse mit einem sozial-konstruktivistischen Ansatz verbinden. Dessen Ziel ist es, intra- und interpersonelle Konflikte auszulösen, deren erfolgreiche Bewältigung produktive Lernprozesse auf kognitiver, emotionaler und behavioraler Ebene anstoßen. / The present work examines participation from an interactional perspective and starts with an interdisciplinary-grounded definition. Subsequently, developmental requirements of social participation competencies in preschool years are examined based on a longitudinal study and pedagogical recommendations are derived. The purpose of participation is to ensure the democratic legitimation of decisions, exploit individual resources, and satisfy basic needs of humans. More narrowly defined from an interactional perspective social participation implies the involvement of an individual in the activities of an already existing group of people and the negotiation of own interests within this group. In the present work it is described as a process with three phases (initiation projection, and realization). Important foundations for successful social development and for the acquisition of social participation competencies are laid in preschool years. Therefore the present work examined the interaction between social participation competencies (motivation and ability) and (1) cognitive parameters (intelligence and perspective taking), (2) self-concept, and (3) conflict behavior (aggression and shyness) in 5- to 7-year old children using cross-lagged panel analysis. In addition, the study addressed the question to what extent social participation competencies are context-bound and examined the importance of structural parameters of family and day care on an explorative basis. The sample consisted of 334 children (51.5 % female, average age at first measurement point 5.4 years) in 71 day care groups in 21 day care institutions stemming from four German federal states. The longitudinal data analysis is based on three measurement points. Results showed significant but moderate correlations of social participation competencies across different situations. High levels of cognitive abilities are associated with high social participation competencies rated by preschool teachers. In addition, longitudinal analyses revealed a close interaction between intelligence and social participation competencies in preschool years. Self-ratings of own competencies, however, are only weakly related to teacher ratings of social participation competencies in preschool children. Longitudinal analyses suggest that when judging about their competencies young children draw on their social participation successes. Later, however, success in participation efforts conversely seems to be more determined by the self-concept. Low participation competencies go along with high levels of aggressive (weakly significant) as well as high levels of shy behavior (moderately significant) as rated by teachers. Regarding aggression and shy behavior only weak interactions with social participation competencies were found based on longitudinal analyses. The accumulation of critical family events (e.g. health or acute financial difficulties) represents a greater threat for the development of children than the socio-economic status of the family. Addressing the promotion of social participation competencies the present results can be linked to a social-constructivist approach. One goal of this approach is to produce intra- and inter-individual conflicts which, in case of successful conflict resolution, initiate productive learning processes on a cognitive, emotional, and behavioral level.

Country music, considered a uniquely American musical genre, has been relatively under-researched compared to rock and rap music. This thesis proposes research into the topic of country music, specifically the ways which country music songs portray gender. The thesis uses Billboard chart data to determine commercially successful songs, and performs a content analysis on the lyrics of these songs. I will select songs from a fifty year period ranging from 1955 to 2005, so as to allow for a longitudinal study of potential changes in presentation. Attention will be focused on the lyrical descriptions of men and women and how their roles are described in the songs.

No description available.