5,771 research outputs found
Nonrenormalization of Mass of Some Nonsupersymmetric String States
It is argued that the quantum correction to the mass of some very massive,
nonsupersymmetric states vanishes in inverse proportion to their tree-level
mass to all orders in string loops. This approximate nonrenormalization can
explain the agreement between the perturbative degeneracy of these states and
the Sen entropy of the associated black holes.Comment: Additional details provided, in particular, of the analytic
continuation of the two point function. Discussion of higher loops
substantially amplified. References added, conclusions unchanged; 19 pages,
harvma
Diversity of Native and Exotic Fruit Genetic Resources in Nepal
Diversity in fruit genetic resources in Nepal is contributed by wild, indigenous and exotic sources. This study was carried out to bring together the available fruit species and cultivars at various stations of Department of Agriculture (DoA), Nepal Agricultural Research Council (NARC), Agriculture and Forest University (AFU) and private farms until the Fiscal Year 2017/2018. Altogather there were 47 species of fruits from tropical zone of Terai (Tarahara, Janakpur, Sarlahi, Parwanipur and Khajura) to cold temperature zone of high hills (Marpha, Rajikot and Satbanj) across the country. Apple diversity was found at Horticulture Research Station, Rajikot, Jumla and has introduced 25 spur type cultivars. National Citrus Research Programme (NCRP), Dhankuta was citrus most diversity areas and has maintained 130 exotic and indigenous germplasms of citrus species followed by NCFD, Kirtipur. Mango diversity was noted at RARS, Tarahara (16 cultivars), RARS, Parwanipur (25 cultivars), Farm of DoA-Sarlahi (30 cultivars), Farms of DoA-Janakpur (18 cultivars), AFU-Rampur (17 cultivars). Some of the private nurseries like Everything Organic Nursery, Patlekhet, Kavre and International organization like Technology Demonstration Centre of ICIMOD, Godawari, Lalitpur were also found to be a diversity centre of many exotic and indigenous germplasms of fruit species. These indigenous fruit genetic resources were also used to develop varieties such as Sunkagati-1 and Sunkagati-2 and Tehrathum Local of acid lime, Khoku Local of mandarin orange, \u27Malbhog\u27 of banana which were notified by the National Seed Board, SQCC. The unique fruit genetic resources were ‘Pharping Local\u27 (Asian sand pear), ‘Sindhuli Junar\u27 (sweet orange), ‘Dhankuta Local\u27 and ‘Manakamana Local\u27 (mandarin), Local Malbhog (banana), Bhaktapure Lapsi (Nepalese hog plum) etc. which have superior traits than exotic fruits. Unique and wild fruit species were yellow, black and red raspberries (Rubus ellipticus, R. foliolosus and R. acuminatus respectively), bale (Aegle marmelos), pummelo (Citrus grandis), citron (Citrus medica), sweet lime (Citrus limettoides), butter tree or chiuri (Basia buttyacea), tamarind (Tamarindus indica), black plum (Syzygium cumini), wild apple (Mallus baccata), rough lemon (Citrus jambhiri), bayberry (Myrica esculanta), edimayal (Pyrus pashia), black and white ebony (Diospyrus malbarica), wild species of olive (Olea ferruginea and O. glandulifera), wild kiwifruit (Actinidia callosa) etc. Most of the diversity studies were based on phenotypic descriptions. We believe that the number of species and genotypes listed in this article would be increased if detail survey is further carried out. Way forward to utilize these valuable genetic resources has also been discussed in this manuscript
Position swapping and pinching in Bose-Fermi mixtures with two-color optical Feshbach resonances
We examine the density profiles of the quantum degenerate Bose-Fermi mixture
of Yb-Yb, experimental observed recently, in the mean field
regime. In this mixture there is a possibility of tuning the Bose-Bose and
Bose-Fermi interactions simultaneously using two well separated optical
Feshbach resonances, and it is a good candidate to explore phase separation in
Bose-Fermi mixtures. Depending on the Bose-Bose scattering length a_\BB, as
the Bose-Fermi interaction is tuned the density of the fermions is pinched or
swapping with bosons occurs.Comment: 8 pages, 7 figure
Magnetism in Transition metal doped Cubic SiC
We report here our study on SiC doped with transition metals using first
principle density functional theory calculations. We have considered cubic SiC
with 3d transition metals as substitutional impurities for Si and C site
separately. Cubic SiC doped with Cr, Mn, show ferromagnetism whereas with Sc,
Ti, V and Co show site dependency of magnetic properties. Rests of the
impurities are found to be non-magnetic.Comment: Presented in the 55th DAE-Solid State Physics Symposium, 26th to 30th
December, 2010, Manipal University, Manipal, India; AIP Conf. Proc. 1349,
1087-1088 (2011
Binary mixtures of condensates in generic confining potentials
We study a binary mixture of Bose-Einstein condensates, confined in a generic
potential, in the Thomas-Fermi approximation. We search for the
zero-temperature ground state of the system, both in the case of fixed numbers
of particles and fixed chemical potentials.Comment: 20 pages, 2 figure
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