Snow leopard     

Abhishek Ghoshal 《Resonance》2017,22(7):677-690

Snow leopard, an elusive mammal species of the cat family, is the top-predator of the Central and South Asian, high-altitude ecosystem. Snow leopards occur at low densities across the Central Asian mountains and the Indian Himalayan region. Owing to their secretive nature and inaccessible habitat, little is known about its ecology and distribution. Due to its endangered status and high aesthetic value, the snow leopard is considered as an ‘umbrella species’ for wildlife conservation in the Indian Himalayas. This article summarizes the current knowledge on snow leopard ecology and conservation issues in the Indian context.  相似文献   

Phthalate puzzle     

Abhijit Ghosh 《Resonance》2017,22(7):691-696

The most common plasticizer, phthalates, are facing stricter regulations due to their omnipresence and possible effects on human health, and environment. But high cost, lack of application range, and unknown long-term effects of non-phthalate alternatives make the scenario puzzling.  相似文献   

A tryst with density     

Shobhana Narasimhan 《Resonance》2017,22(8):731-746

WalterKohn transformed theoretical chemistry and solid state physics with his development of density functional theory, for which he was awarded the Nobel Prize. This article tries to explain, in simple terms, why this was an important advance in the field, and to describe precisely what it was that he (together with his collaborators Pierre Hohenberg and Lu Jeu Sham) achieved.  相似文献   

Trials,tribulations, and joys of Punjab’s first scientist     

Neera Burra 《Resonance》2017,22(9):823-828

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2016 Nobel Prize in Chemistry     

N. Jayaraman 《Resonance》2017,22(9):835-845

The Nobel Prize in Chemistry for the year 2016 was awarded to three illustrious chemists, Professors Jean-Pierre Sauvage, Sir Fraser Stoddart, and Ben Feringa. Pioneering works of these chemists on designing molecules, chemically synthesizing them, and extracting a work out of such designed molecules open-up a new area of chemistry in a paradigm shifting manner. Beginning with controlling the molecular motions, particularly involving interlocked macrocycles in late 1980s, the advancement progressed to envelop energy storage and retrieval, and varieties of examples around the concept. Molecular motion alone can also be a rich source for such a work output has also been established. These developments possess the required momentum to uncover a new area of chemistry, wherein energy input-output can be used beneficially to conduct a useful work, in a close analogy to machines such as an electric motor.  相似文献   

The brachistochrone     

P. C. Deshmukh  Parth Rajauria  Abiya Rajans  B. R. Vyshakh  Sudipta Dutta 《Resonance》2017,22(9):847-866

The brachistochrone problem posed by Bernoulli and its solution highlights one of the most famous experiments in physics which illustrates the variational principle. This pedagogical study is designed to ignite a classroom discussion on the variational problem. We overview the Euler–Lagrange formalism of the variational principle and obtain the solution to the brachistochrone problem. We demonstrate the success of the variational method using brachistochrone models which were fabricated specially for this purpose.  相似文献   

Editorial     

Kaushal Verma 《Resonance》2017,22(10):905-906

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Unearthing the Banach–Tarski paradox     

B. Sury 《Resonance》2017,22(10):943-953

Greeks used the method of cutting a geometric region into pieces and recombining them cleverly to obtain areas of figures like parallelograms. In such problems, the boundary is ignored. However, in our discussion, we will take every point of space into consideration. The human endeavour to compute lengths, areas, and volumes of irregular complicated shapes and solids created the subject of ‘measure theory’. The paradox of the title can be informally described as follows. Consider the earth including the inside stuff. It is possible to decompose this solid sphere into finitely many pieces and apply three-dimensional rotations to these pieces such that the transformed pieces can be put together to form two solid earths! The whole magic lies in the word ‘pieces’. The pieces turn out to be so strange that they cannot be ‘measured’.  相似文献   

Physical Activity Promotion in Greek Preschools: The Gap Between Theory and Practice     

Fotini Venetsanou  Antonis Kambas 《Early Childhood Education Journal》2017,45(3):437-444

Recent research evidence has revealed that Greek preschoolers’ physical activity (PA) levels are not satisfactory. Taking into account the amount of time spent daily in preschool settings as well as the finding that preschool appears to be a significant predictor of children’s PA, the aim of the present study is to provide an overview of the role of Greek preschool settings in children’s PA promotion. For that purpose, data regarding PA in Greek preschools are presented and the possible relevance of school characteristics to PA enhancement, namely the curriculum, school facilities and equipment, are critically discussed. Emphasis is also given to the need for the inclusion of developmentally appropriate physical education in the daily school schedule. Last but not least, the importance, of training not only the physical educators but also preschool teachers in promoting their students' PA is underscored.  相似文献   

Single Mothers’ Experiences of Support at Their Young Children’s School: An Interpretative Phenomenological Approach     

Erin M. West  Lynne Guillot Miller  Randall M. Moate 《Early Childhood Education Journal》2017,45(3):379-391

This phenomenological study explored six single mothers’ experiences of support at their young children’s school. Themes resulting from interpretative phenomenological analysis suggest the single mothers experienced tangible (e.g., school resources, school-wide events, structural flexibility, teachers’ formal communication) and intangible (e.g., caring relationships with school faculty and staff, experiencing teachers as parenting partners, perceiving acceptance from the school environment) forms of support from their children’s school. Furthermore, results suggest these single mothers experienced intangible supports more prominently than tangible forms of support. The support needs of these single mothers at their young children’s school were also explored including the mothers’ desire for stronger relationships with other parents and families at the school.  相似文献