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1.
Abhinaba Das 《Resonance》2018,23(6):669-681
A unique attribute of Earth is the presence of plate tectonics. Not only does it give rise to continents, mountain chains, and ocean basins but also promotes a high level of biodiversity. It is the reason for the formation of the so-called ‘Pacific Ring of Fire’ – a belt of intense volcanic activity and a large number of earthquakes surrounding the Pacific ocean. But what drives the plate motion? Did Earth always have plate tectonics? These are some fascinating geoscientific questions. In trying to answer these questions, an effort is made to impress upon the reader the vast ocean of uncertainty, and hence the opportunity, in the field of Earth and Planetary Sciences. To make it more engaging, the article provides a peek into the long process which culminated in the present-day theory of plate tectonics on Earth. While the first half of the article focuses on subduction and its cause, the second half summarizes a recent finding made on the surface of Europa. In view of readability across disciplines, the complex subject details are kept to bare minimum.  相似文献   
2.
The motion of a projectile in a constant gravitational field is an age-old problem. If there is no resistive force, the problem is simple. However, with the intoduction of resistive forces, the complexity of the problem increases. Recently, there has been a growing interest in the problem of projectile motion under a resistive force proportional to the square of velocity. The problem for resistive force proportional to vv cannot be solved in closed analytical form. A series solution of the equation leads to divergent series for x (t) and y (t) for reasonable values of the initial speed and angle of projection. However, we demonstrate that by inverting the series for x (t), i.e., expressing t in terms of x, and substituting this in y (t) one can express y in terms of x which is a highly convergent series and one can obtain the path of projectile with a few terms of the series. We further demonstrate that one can obtain the path even with a few terms of the divergent series for x (t) and y (t) by using extrapolation methods.  相似文献   
3.
Any policy reform in education is highly effective when it is planned and implemented ‘holistically’ and yet, it is the most challenging way forward. Many countries in Asia have reformed their English language policies and syllabi in the last two decades due to the increasing value of the language worldwide. Motivated by a ‘communicative approach’ to English language teaching, Bangladesh was one of the countries that launched such a reform in the 1990s. However, this reform has been criticised for imposing the changes on teachers without preparing them sufficiently. More importantly, there is limited evidence as to how much the secondary English language assessment system is aligned with the changes introduced in the curriculum. In order to explore this gap, a medium-scale study was conducted in 38 secondary schools in Bangladesh, following a mixed methods approach. The findings highlighted a ‘mismatch’ between the intended English language learning outcomes and current assessment practices, including the resulting challenges faced by the teachers. This paper argues that language education reform is likely to fail if the assessment system is not aligned with the curriculum.  相似文献   
4.
This paper seeks to understand the dominant civic discourses of accusation of racism leveled against the Australians as expressed by the victims of racist attacks and Indian Government officials in the Times of India and Outlook India news magazines. The aim of the paper is to understand how the logics of the discourses have constituted the racially motivated attacks on the Indian diaspora in Australia, and how the nationalistic sentiments are fostered among the diasporic Indians and the Indians in India. The paper argues that there is a mutual production of diasporic and homeland nationalism in the face of a crisis that hits the Indian diaspora in Australia. This analysis also brings to fore the ideology of multiculturalism in Australia.  相似文献   
5.
6.
Arpita Das 《Sex education》2014,14(2):210-224
Comprehensive sexuality education (CSE) has been recognised globally as key to helping young people assert their sexual and reproductive rights. In India too, there is growing awareness of the importance of providing CSE not only to reduce sexually transmitted infections, unintended pregnancies and abortions but also to teach important life skills. Simultaneously, lack of political will and conflicting interests among certain religious and political factions have ensured that no uniform CSE curriculum has been implemented throughout the country. This paper analyses the Adolescent Education Programme teacher curriculum as revised in 2009–2010 by the National Council of Educational Research and Training and the United Nations Population Fund. It highlights some of the opportunities presented by the curriculum and argues that despite its intent of providing relevant sexuality education for young people, the language of the curriculum is vague, thus potentially exacerbating confusion, and excluding people who do not conform to societal stereotypes of sex, gender, and ability. In order to be holistic, any CSE programme must be inclusive, cater to diverse needs and present content in a rights-based language without adding to the socio-cultural context of mystery and shame attached to sexuality.  相似文献   
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8.
Some research within developmental psychology shows a slow period of development in children's expressive drawings during the primary school years. Developmental researchers suggest that ‘educational factors’ could contribute to this dip in development but have not explored these factors. This study explores links between educational policy – in terms of the English National Curriculum – and the development of expression in child art. A Foucauldian style analysis of interviews is presented which investigates how ten primary school teachers working in two Staffordshire schools approach art. A specific concern is to explore how different understandings of art and teaching practices are shaped and managed by the curriculum. This allows links between the demands of the curriculum and the observed dip in expressive drawing development to be investigated.  相似文献   
9.
The paper provides (1) a teacher-administered rating instrument for inattention without confounding the rating with hyperactivity and conduct disorder, and (2) evidence that the ratings correlate with the scores obtained from cognitive tests of attention. In Study I, the first objective was to investigate the construct validity and the inter-rater reliability of the Attention Checklist (ACL) by factor analysing the teacher ratings of 110 Grade 4 children, obtained by using the ACL. The second objective was to investigate the predictive validity of the ACL by examining the relationship between the scores obtained for the participants from teachers' ratings using the ACL and the scores obtained by participants in the lab-type attention tests. The results of factor analysis showed that a single factor labelled ‘inattention’ underlies the 12 items in the ACL. Examining the differences in performance on attention tests, the ‘low attention’ children as rated by the teachers on the ACL scored lower than the ‘high attention’ children on the objective tests of attention. These findings were replicated in Study II, which was conducted to test further the construct validity and predictive validity of the ACL. This time, only those two tests (Auditory Attention and Visual Attention) that had shown relatively poor discrimination between the high and low attention groups in Study I were, again, administered to another cohort of 97 Grade 4 children, as it was our intention to further challenge the reliability of the ACL. Overall, the results of both studies suggest that comprehensive assessment of attention skills should include both ACL and objective measures of selective attention.  相似文献   
10.
Attention disorders in the school population include attention deficit, hyperactivity and conduct disorders. A key concept for distinguishing hyperactive from attention disorders is behavioural inhibition as advocated by Barkley, a prominent American researcher. However, the concept itself needs to be understood because, as argued in this paper, there are two kinds of inhibition: Pavlov's original concept and the American one. These should be differentiated if the abnormal conditions associated with attention and hyperactivity are to be rationally connected to cognitive characteristics, rather than to be solely based on clinical symptoms and behavioural ratings. We suggest a consensus on the concept of inhibition and a unified view of attention disorders integrating cognitive and behavioural manifestations. Finally, the importance of basing remediation on a theoretically supported and rationally derived set of cognitive training tasks for the amelioration of inattention and hyperactivity is offered.  相似文献   
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