Investigating texture six zero lepton mass matrices

Texture six zero Fritzsch like as well as non Fritzsch like hermitian lepton mass matrices (144 combinations in all) have been investigated for both Majorana and Dirac neutrinos for their compatibility with the current neutrino oscillation data, keeping in mind the hierarchy of neutrino masses. All the combinations considered here for Majorana neutrino masses are ruled out by the existing data in the case of inverted hierarchy and degenerate scenario. For Majorana neutrinos with normal hierarchy, only 16 combinations can accommodate the experimental data. Assuming neutrinos to be Dirac particles, normal hierarchy, inverted hierarchy as well as degenerate neutrinos are ruled out for all combinations of texture 6 zero hermitian mass matrices.Comment: 14 pages, 2 figure

Development of a microprocessor-based biochemical sampler

Modern medicine requires patients to be treated on the basis of precise data, which are often obtained from electronic equipment. An inexpensive and portable microprocessor-based sampler developed by the authors is described. It is comprised of the following units: sample plate assembly, probe-drive linkage system, wash fluid receptacle, timing system and 8085A microprocessor

Chloridizing Roasting of Spent NdFeB Magnet Using Ammonium Chloride

The thermogravimetry is a useful tool to understand the roasting behavior of ores and minerals. Roasting of spent rare earth magnet (NdFeB) has evolved as attractive method for recycling of rare earth elements (REE) to conserve their scarce resources. We studied the chloridizing roasting of spent magnets of wind turbines with an objective to selectively convert the REE into water soluble chlorides. TG-DTA of NdFeB powder shows the commence of oxidation above 300°C. Further TG-DTA studies of NdFeB-NH4Cl mixture corroborated with thermodynamic calculations indicates 300°C as suitable temperature for chloridizing roasting process to obtain the NdCl3 and Fe2O3

The Large-Scale, Authentic Assessment of Listening and Speaking as Interactive Communication: Issues in Reliability

In this article we discuss reliability issues in the large-scale assessment of speech communication through authentic or performance techniques used recently in Saskatchewan. New performance-based approaches enable educators to evaluate the integrated, interpersonal communication skills of large populations of students, thereby modeling best professional practice. We conclude, however, that decentralized teacher rating approaches do not yet demonstrate sufficient reliability to enable public officials to use the results for high-stakes testing purposes.Dans cet article, nous discutons de questions de fiabilité dans réévaluation à grande échelle de la communication verbale par le biais de techniques authentiques (ou basées sur la performance) employées en Saskatchewan. De nouvelles approches reposant sur la performance permettent aux enseignants d'évaluer les compétences communicatives intégrées et interpersonnelles de grandes populations d'élèves, reflétant ainsi les meilleures stratégies pédagogiques. Nous concluons toutefois que les approches impliquant une évaluation décentralisée ne s'avèrent pas encore suffisamment fiables pour que les fonctionnaires se servent des résultats dans des contextes ou l'enjeu est considérable