Electrostatically-Driven Resonator on Soi with Improved Temperature Stability

This paper deals with a single-crystal-silicon (SCS) MEMS resonator with improved temperature stability. While simulations have shown that the temperature coefficient of resonant frequency can be down to 1 ppm/degrees C, preliminary measurements on non-optimised structures gave evidence of a temperature coefficient of 29 ppm/degrees C. Design, optimisation, experimental results with post process simulation and prospective work are presented.Comment: Submitted on behalf of TIMA Editions (http://irevues.inist.fr/tima-editions

Linguistic human rights and multilingual education : report from an Indian university

This paper will report on the designing and teaching of Masters-level courses on multilingual education and linguistic human rights. These courses are being offered at a private, not-for-profit Indian university which has an explicit social justice agenda. The deliberately diverse student body offers unique opportunities to explore multilingualism in the classroom and in society: a July 2019 class of 46 students had between them 35 languagenames! The essay first sets out the somewhat unusual background of the University. It then gives an overview of some aspects of the University’s diversity. Thereafter, we describe a few of our courses on multilingualism, their objectives, and some pedagogic strategies. The university aims to create reflective practitioners for the social sector – especially in education, development and public policy. There is therefore a discursive coherence between the various courses in the Masters programmes. Students are particularly receptive to arguments about discrimination, exclusion, equity, rights, and policies. However, while class, caste, gender and region are familiar axes of exclusion, there is much less awareness among students of the intersectionality of language as reflecting, constituting, and reproducing privilege, discrimination and exclusion. The courses on multilingual education and linguistic human rights thus build on the strengths that the programmes and the students already have. The courses then seek to go beyond, inviting students to critique existing linguistic inequalities, and devise an innovative curriculum and pedagogy. The essay ends by sketching two initiatives of the University that will help to develop critical perspectives on India’s multilingualism, and design educational and policy interventions which strengthen mother-tongue based multilingualism and contribute to the building of a just, equitable, sustainable and humane society. This paper reviews the experience of teaching these courses, and suggests some possible future directions

Chemical composition of evolved stars of high galactic latitude

We have carried out abundance analysis for a sample of high galactic latitude supergiants in search of evolved stars. We find that HD 27381 has atmospheric parameters and an abundance pattern very similar to that of the post-AGB star HD 107369. HD 10285 and HD 25291 are moderately metal-poor and show the influence of mixing that has brought the products of NeNa cycle to the surface. The high galactic latitude B supergiant HD 137569 shows selective depletion of refractory elements normally seen in post-AGB stars. We find that the high velocity B type star HD 172324 shows moderate deficiency of Fe group elements but the CNO abundances are very similar to that of disk B supergiants. The observed variations in the radial velocities, transient appearance of emission components in hydrogen line profiles and doubling of O I lines at 7774\AA support the possibility of this star being a pulsating variable or a binary star.Comment: 12 pages, 6 figures. Accepted in A&