174 resultados para Nature study.


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Evidence that many students are not being captivated by school science has led to advocacy of revising the science curriculum. However, there need to be accompanying changes in science teacher education. This study is designed to lay foundations for innovation in the pre-service education of secondary science teachers, involving a reconceptualisation of the nature of contemporary science and a course structure that links science teaching with broader science public reform initiatives. We held a series of Focus Groups, built around Government Research Priority areas, which brought together people from industry, government, research organisations, and community groups involved in science and its applications. In the groups the participants discussed how science currently operates in their area, ways in which the area will develop in the coming decade, and what implications there are for the nation and its citizens and for science education. What emerged was a concern for public responses to science at a range of levels, and a very different view of science practice and community involvement with science to that represented in current university and school science courses. This was confirmed in interviews with science graduates working in disparate fields, and also focus groups of school students. The paper will report on the insights generated, and explore the implications for redesigning the pre-service education of science teachers.

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Schools in England are being urged to personalize the curriculum and make school experiences more responsive to all students. We report on an evaluation project which investigated innovation in teaching and learning in a successful secondary school in the north of England. Data were gathered from a sample of teaching staff, a questionnaire to all students, lesson and meeting observations, and meetings with the governing body and parents: the student-guided evaluation canvassed recent and planned changes to the structure and experience of teaching and learning. This article illuminates how one school is breaking the ‘traditional schooling rules’ that limit improvement and how in doing so it is developing new insights about the nature and process of improvement. We show how staff and students have been engaged in the change process, and focus in particular on analysing the interplay between improvement as a plan, a practice and a lived experience.

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This exploratory mixed method study investigated the factors, including access to nature (i.e. parks and gardens), impacting on inner city high-rise residents' health and wellbeing. Analysis of the integrated findings revealed that a range of factors (including accessibility, choice and control and tenure) impact on residents' health and wellbeing.

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This study of Thomas Hobbes's political thought maintains that, in Hobbes's abstract and historically presented view, short-sighted and self-absorbed people engaged in war to their ultimate harm. In Hobbes's societal remedy, citizens submissively obeyed centralised rule. Their compliance, and detachment from the political process, satisfied their wish for peace.

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MgAl2O4 (spinel) is considered as a commercially important ceramic reinforcement in MMC fabrication because of the possible tailorable properties imparted with Al for many applications. Generally, any oxygen source, i.e., the dissolved oxygen, or pure oxygen atmosphere or atmospheric oxygen is sufficient for the formation of MgAl2O4 in Al–Mg alloy. Among all the reactive oxygen sources, the reactivity of SiO2 with Al alloy is found to be higher. Amorphous silica is highly reactive in nature compared to crystalline silica. The present study has examined the thermodynamics of MgAl2O4 formation in Al–Mg alloy by amorphous silica sources with the aid of differential thermal analyzer (DTA) and the simulated experiments. The dissolution of Si and the formation of MgAl2O4 are detected as the endothermic peak and the immediate exothermic peak respectively in DTA curves and the presence of MgAl2O4 is confirmed by the XRD of the simulated sample. The MgO formed due to the oxidation of Mg in Al–Mg alloy has been found to influence the MgAl2O4 formation.

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This paper utilizes Bourdieu's conceptual frame to examine the mediatized effects of policy processes concerned with the growth and support of knowledge industries in Australia. These policies span education, science, research and other knowledge industries (such as venture capital firms and intellectual property law). The paper argues that some policy processes are best represented as temporary social fields. The nature of these fields can be described by the kinds of cross-field effects that they produce, A case study of an Australian knowledge economy policy, The chance to change, and associated policy processes demonstrates the broad analytic capacities of Bourdieu 's conceptual frame for policy analysis, when combined with the concepts of cross-field effects and temporary social field developed here.

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Microfluidics has the potential to enhance the understanding of the biological fluids under strain, due to the laminar nature of the fluid and the possibility to mimic the real conditions. We present advances on charaterization of a microfluidic platform to study high strain rate flows in the transport of biological fluids. These advances are improvements on the reproduction of a  constant extensional strain rate using micro contractions and development of 3D numerical models. The micro geometries have been fabricated in polydimethyl siloxame (PDMS) using standard soft-lithography techniques with a photolithographically patterned mold. A comparison of some microcontractions with different funnel characteristics is presented. The Micro Particle Image Velocimetry technique has been applied to validate the numerical simulations. We demonstrate the use of microfluidics in the reproduction of a large range of controllable extensional strains that can be used in the study of the effect of flow on biological fluids.

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Biological fluids such as blood, proteins and DNA solutiosn moving within fluidic channels can potentially be exposed to high level of shear, extension or mixed stress, either in vitro such as industrial processing of blood products or in vivo such as ocurrs in some pathological conditions. This exposure to a high level of strain can trigger some reactions. In most of the cases the nature of the flow is mixed with shear and extensional components. The ability ot isolate the effects of each component is critical in order to understand the mechanisms behind the reactions and potentially prevent them. Applying hydrodynamic flow focusing, we present in this investigation the characterization of microchannels that allow study of the regions of high shear or high extension strain rate. Micro channels were fabricated in polydimethyl siloxane (PDMS)  using standard soft-lithography techniques with a photolithographically patterned mold. Characterization of the regions with high shear and high extension strain rate is presented. Computational Fluid Dynamics (CFD) simulations in three dimensions have been carried out to gain more detailed local flow information, and the results have been validated experimentally. A comparison between the numerical models and experiment and is presented. The advantages of microfluidic flow focusing in the study  of the effects of shear and extension strain rates for biological fluids are outlined.

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Research findings show that the poor level of English accomplishment amongst Japanese students in English as Second Language (ESL) settings continues to be an issue of concern. This interpretative study adopted an ethnographic case method to explore and advance reader’s understanding of Japanese learner’s sociocultural characteristics and, also, to investigate how cross-cultural similarities/ differences between the sociocultural heritage of Japanese learners and the contextual factors of Australian English for Academic Purposes (EAP) study abroad programs interact. This study aims to interpret the problems surrounding the poor performance of Japanese students in Australian ESL contexts and identify issues not present in the literature that warrant further investigation. Interviews, structured by a thematic reporting framework, were used as the interpretive instrument for data collection. Data, supported by the reporting framework, was analysed using a constant comparative method. The exploratory nature of this report led to the following conclusions. Firstly, Japanese students’ past educational experience interferes with Second Language Acquisition (SLA) in Australian EAP study abroad programs. Secondly, Japanese students have a predisposition towards integrative motivation. Thirdly, significant others influence Japanese learners’ ability to cope with transition issues, such as managing academic and social problems. Finally, contextual factors of Australian EAP programs (e.g. course materials, teaching and learning methodology and assessment) negatively impact English language learning. This study raises questions about the difficulties experienced by Japanese learners in Australian EAP study aboard programs.

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31P and 19F solid state NMR have been used to study the nature of the PF6− anion in polypyrrole films at various levels of oxidation. It appears that the symmetric PF6− unit remains undistorted and unchanged throughout, suggesting that it is predominantly acting only as a counterion and not as a true ‘dopant’, since any distortion in the phosphorous environments would result at the very least in chemical shift anisotropy of the 31P nucleus. A second set of phosphorous and fluorine resonances, which are consistent with a difluoride phosphorous compound, appeared in the films. Upon electrochemical reduction of the polymer, the undistorted PF6− anion leaves the film whereas the second phosphorous species remains. Re-oxidation of the polymer reverses the processes observed during reduction.

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It is estimated that half of the world’s population now live in urban environments. Urban living necessitates a removal from nature, yet evidence indicates that contact with nature is beneficial for human health. In fact, everyday urban places, such as where people live, study, and work, provide opportunities to bring nature back into cities to contribute to positive, healthy environments for people and to foster the human–nature connection. The inclusion of more nature in cities could have additional environmental benefits, such as habitat provision and improving the environmental performance of built environments. In the context of climate change, outcomes such as these assume further importance. This article explores how common urban places can foster links between people and nature, and generate positive health and well-being outcomes. We achieve this by exploring nature in the everyday settings of schools and residential housing.

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Objective: The aim of this study was to assess the major dietary patterns of two age cohorts of women, to determine to the extent to which the dietary patterns differ between the cohorts and to assess whether they vary according to sociodemographic and behavioural characteristics and patterns of nutrient intake.

Method:
Dietary intake was assessed using an 80-item food frequency questionnaire for women aged 50–55 years (n=10 150; ‘middle age’) in 2001 and aged 25–30 years (n=7371; ‘young’) in 2003, from the Australian Longitudinal Study on Women's Health. Factor analysis using principal component extraction was used to identify dietary patterns, and a pattern score was calculated from the consumption of the food items identified with each dietary pattern. Associations between the dietary pattern scores and sociodemographic and behavioural characteristics and nutrient intakes were investigated using regression analysis.

Results: Six dietary patterns were identified and were labelled: cooked vegetables; fruit; Mediterranean-style; processed meat, meat and takeaway; reduced fat dairy; and high-fat and sugar foods. Regression analysis revealed that healthier dietary patterns were significantly associated with other favourable health-related behaviours, higher socioeconomic status and living in urban areas (P-values <0.05).

Conclusions:
In spite of differences in the level of consumption of individual food items, the similarity in dietary patterns across two generations of women suggests that policies and interventions to improve diet should focus on social and economic factors and general health-related behaviour rather than different age groups.

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Objective: To determine the independent contributions of family and neighbourhood environments to changes in youth physical activity and body mass index (BMI) z-score over 5 years.

Methods: In 2001, 2004 and 2006, 301 children (10–12 years at baseline) had their height and weight measured (BMI was converted to z-scores using Centers for Disease Control and Prevention reference charts; see http://www.cdc.gov/growthcharts) and moderate-to-vigorous physical activity (MVPA) assessed using accelerometers. In 2001, parents reported on the home environment (social support, role modelling, rules and restrictions, physical environment) and perceived neighbourhood environment (local traffic, road safety, sporting venues, public transport), and Geographic Information Systems were used to map features of the neighbourhood environment (destinations, road connectivity, traffic exposure). Generalized estimating equations were used to predict average BMI z-score and MVPA over time from baseline home and perceived and objective neighbourhood environment factors.

Results: Among boys, maternal education and heavy traffic were inversely associated, and sibling physical activity, maternal role modelling of MVPA and the presence of dead-end roads were positively associated with MVPA. Having unmarried parents, maternal MVPA role modelling and number of home sedentary items were positively associated with BMI z-score among boys. Among girls, having siblings, paternal MVPA role modelling, physical activity rules and parental physical activity co-participation were positively associated with MVPA. Having unmarried parents and maternal sedentary behaviour role modelling were positively associated, and number of sedentary behaviour rules and physical activity items were inversely associated with BMI z-score among girls.

Conclusion: The home environment seems more important than the neighbourhood environment in influencing children's physical activity and BMI z-score over 5 years. Physical activity and weight gain programmes among youth should focus on parental role modelling, rules around sedentary and active pursuits, and parental support for physical activity. Intervention studies to investigate these strategies are warranted.

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What I have called the Ideal of Cultivation is a fundamental ethical principle of civilisation, originated by aristocratic warriors in Greek antiquity who held that the true purpose of humanity is to perfect nature

It was then professed that individuals and even entire peoples could consciously develop and improve themselves in a way that was thought to obey the original lawful impulses of nature, a process which was likened to those of agriculture and animal husbandry.

Subsequently the cognate idea of a politics of cultivation arose which deemed that society should be organised specifically to produce more virtuous or perfect human types. Given their fundamental association with Hellenism both ideas have been revisited constantly in the intellectual history of the west, and most notably during the great secular periods, the Renaissance and Enlightenment when active attempts were made to retrieve the ideals of antiquity. Both ideas were particularly pervasive in the German enlightenment, the Aufklärung, and were assimilated by the succeeding Romantic generation.

In nineteenth century Germany, when interest in these ideas was quickly waning, the German philosopher Friedrich Nietzsche acquired an unswerving attachment to them and made the service of them his life's work.

The intention of this essay is to trace methodically the appearance of the Ideal of Cultivation in Nietzsche's philosophy and politics, and to outline his responses to a world which was abandoning the principles in which he deeply believed. This essay should be regarded as a case study in the long history of a fundamental ethical idea rather than one about the philosopher Nietzsche.

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The Bangladesh Bank is now encouraging corporate social responsibility (CSR) disclosure by banks however the adoption of CSR remains voluntary and not mandatory. The aim in this paper is to determine the nature and extent of corporate social responsibility disclosure in the banking sector in Bangladesh, and to assess the need to improve corporate social responsibility by such organisations. We observe, from our content analysis of the annual reports of three cases studies within the banking industry of Bangladesh, that corporate social responsibility disclosures focus on initiatives undertaken to support two critical two sectors within Bangladesh's economy. agriculture and the SME sector. Further disclosures address contributions and donations made by the banks to support underprivileged sections of Bangladesh society including destitute youth and women. Of the three cases examined in this study, two are relatively new entrants to the banking sector. We observed that the newest firm, incorporated in 1999, made no disclosures in regards to its corporate social responsibility and, as a consequence, conclude that the corporate governance mechanisms in this firm are likely to be unsophisticated.