340,196 research outputs found
J. S. Verma
No full textSriram Panchu’s article “A Tribute to J S Verma” (EPW, 11 May 2013) was informative and illuminated the imprint of the late Jagadish Sharan Verma on the Indian judicial system and public life
ON THE SYNONYMY BETWEEN SPINITECTUS INDICUS VERMA AND AGARWAL, (1932) AND S. MUELLERI GUPTA AND VERMA (1927)
No full textSpinitectus indicus Verma and Agarwal (1932), a nematode belonging to the genus Spinitectus Fourment, 1946 (Spinitectinae S. kirjabin, 1946) is parasitic in fish hosts like Pseudotropius garua, Eutropiichty\u27s vacha, Wallago attu and Notopterus notopterus and is distributed to Allahabad, Lucknow (U.P.) and Dacca (Bangladesh). In the year 1977 Gupta & Verma reported another species S. muelleri from Notopterus notopterus at Lucknow. The latter species was given an independent status by Gupta & Verma (1977). Soota (1983) though said that the above two nematodes are synonyms but failed to give any plausible reason in such a synonymy. The present authors have consulted the original papers of Verma & Agarwal (1932) and Gupta & Verma (1977), and have compared the different parameters of two nematodes under study. The authors have definite reason, in considering S. muelleri Gupta & Verma (1977), a synonym of S. indicus Verma & Agarwal (1977)
Bigrassmannian permutations and Verma modules
No full textWe show that bigrassmannian permutations determine the socle of the cokernel of an inclusion of Verma modules in type A. All such socular constituents turn out to be indexed by Weyl group elements from the penultimate two-sided cell. Combinatorially, the socular constituents in the cokernel of the inclusion of a Verma module indexed by w is an element of S-n into the dominant Verma module are shown to be determined by the essential set of w and their degrees in the graded picture are shown to be computable in terms of the associated rank function. As an application, we compute the first extension from a simple module to a Verma module
Extensions of “thickened” Verma modules of the Virasoro algebra
No full textAbstractLet g denote the Virasoro Lie algebra, h its Cartan subalgebra, and S(h) the symmetric algebra on h. In this paper we consider “thickened” Verma modules M(λ) which are (U(g),S(h))-bimodules satisfying M(λ)⊗S(h)C≅M(λ) where M(λ) is the usual Verma module with highest weight λ∈h∗. We determine Ext1(M(μ),M(λ)) to be S(h)/φμ,λS(h) where φμ,λ is, up to a C-algebra automorphism of S(h), a product of irreducible factors of the determinant of the Shapovalov matrix. This result provides a conceptual explanation of the factorization of the Shapovalov determinant and implies that the inverse of the Shapovalov matrix has only simple poles
On multiplicities of simple subquotients in generalized Verma modules
No full textsummary:We reduce the problem on multiplicities of simple subquotients in an -stratified generalized Verma module to the analogous problem for classical Verma modules
Join operation for the Bruhat order and Verma modules
No full textWe observe that the join operation for the Bruhat order on a Weyl group agrees with the intersections of Verma modules in type A. The statement is not true in other types, and we propose a weaker correspondence. Namely, we introduce distinguished subsets of the Weyl group on which the join operation conjecturally agrees with the intersections of Verma modules. We also relate our conjecture with a statement about the socles of the cokernels of inclusions between Verma modules. The latter determines the first Ext space between a simple module and a Verma module. We give a conjectural complete description of such socles which we verify in a number of cases. Along the way, we determine the poset structure of the join-irreducible elements in Weyl groups and obtain closed formulae for certain families of Kazhdan-Lusztig polynomials
Verma kraftverk. Konsekvenser knyttet til planer for nytt kraftverk i Verma
No full textErikstad, L., Andersen, O., Halvorsen, G., Reitan, O., Risan, T. & Stabbetorp, O. 2008. Verma kraftverk - Konsekvenser knyttet til planer for nytt kraftverk i Verma. - NINA Rapport 357. 55 s.
Denne rapporten består av tre deler som hver for seg er knyttet til tre ulike stadier i arbeidet med konsekvensanalyse for tiltak knyttet til planene for opprusting av eksisterende Verma kraftverk. Det er alternativ beskrevet i del 3 som er aktuelle per 1/1 2008. Første delen av rapporten dekker utredningene i 2002/2003 for alternativene A1 og A2 som representerer en moderat opprustning av eksisterende Verma kraftverk Største forskjell i forhold til dagens situasjon (0-alternativ) er økt slukeevne, høyere inntaksdam og at et av alternativene vil slippe utløpsvann i Rauma nedenfor samløpet. Konsekvensene er vurdert å være negative, men små. Størst negativ konsekvens er knyttet til utslipp av utløpsvann nedstrøms et viktig gyte og oppvekstområde for laks ved Løkra. Del 2 i rapporten omfatter en utredning parallelt med del 1, men med mer omfattende planer for berørte elvestrekninger i både Verma og Rauma. Rauma med Verma er varig vernet mot kraftutbygging. Det er uklart hva dette vernet innebærer i detalj for nedre del av Verma der eksisterende kraftverk med regulering var etablert før vernet ble vedtatt. Del 3 omfatter en ny vurdering med spesiell vekt på biologisk mangfold og rødlistede arter knyttet til nye og reviderte opprustningsplaner. Planene ligger nær de opprinnelige planalternativene A1 og A 2, men det er også et alternativ som er en mellomting mellom disse. Konklusjonene er tilsvarende som de som ble trukket i del 1 av rapporten. En viktig biotop ved utløpet av Verma vurderes å bli lite berørt under forutsetning av at utløpstunneler ikke legges slik at skogsmark blir berørt. Nytt alternativ 6 som slipper vann umiddelbart nedstrøms samløpet mellom Verma og Rauma er klart bedre med hensyn til konsekvenser for fisk enn alternativ A2 og alternativ 4, men litt mer ugunstig enn alternativ A1 og alternativ 3. konsekvensanalyse, vassdrag, kraftverk, Verma, Rauma kommune, Møre og Romsdal fylke, environmental impact asessment, hydroelectric development, Verma, Rauma municipality, Møre & Romsdal count
Green approaches to biocomposite materials science and engineering/ Deepak Verma, Siddharth Jain, Xiaolei Zhang, and Prakash Chandra Gope, editors.
No full textIncludes bibliographical references and index."This book explores timely research on the various available types of natural fibers and the use of these fibers as a sustainable alternative to synthetic fibers and polymers by emphasizing research-based solutions for sustainability across various industries"--Provided by publisher.Natural fibers for the production of green composites / Xiaolei Zhang [and 3 others] -- Processing technologies for green composites production / Deepak Verma, Garvit Joshi, Rajneesh Dabral -- Concurrent design of green composites / Muhd Ridzuan Mansor [and 5 others] -- Effect of bamboo hybridization and staking sequence on mechanical behavior of bamboo-glass hybrid composite / Piyush P. Gohil [and 3 others] -- Estimation of mechanical and tribological properties of epoxy-based green composites / Supriyo Roy [and 3 others] -- Fabrication and processing of pineapple leaf fiber reinforced composites / S. H. Sheikh Md. Fadzullah, Zaleha Mustafa -- Green composites and their properties: a brief introduction / Deepak Verma [and 4 others] -- Rice husk reinforcement in polymer composites / Sanjay Sharma, Deepak Verma -- Techno-economic and life cycle assessment for the production of green composites / Siddharth Jain, Xiaolei Zhang -- Banana fiber reinforcement and application in composites: a review / Abhinav Shandilya, Ayush Gupta, Deepak Verma -- Bamboo fiber-reinforced composites / Irem Sanal -- Coir fiber-reinforced composites / Irem Sanal.1 online resource (322 pages)
Role of the strain-rate tensor in turbulent scalar-transport modeling
No full textWe examine the geometric orientation of the subfilter-scale scalar-flux vector in homogeneous isotropic turbulence. Vector orientation is determined using the eigenframe of the resolved strain-rate tensor. The Schmidt number is kept sufficiently large so as to leave the velocity field, and hence, the strain-rate tensor, unaltered by filtering in the viscous-convective subrange. Strong preferential alignment is observed for the case of Gaussian and box filters, whereas the sharp-spectral filter leads to close to a random orientation. The orientation angle obtained with the Gaussian and box filters is largely independent of the filter-width and the Schmidt number. It is shown that the alignment direction observed numerically using these two filters is predicted very well by the tensor-diffusivity model. Further a-priori tests indicate poor alignment of the Smagorinsky and stretched vortex model predictions with the exact subfilter flux
- …
