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Search Results: 1 - 10 of 325695 matches for " S Acharya "
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H?gbomite Associated with Vanadium bearing Titaniferous Magnetite of Mafic-Ultramafic Suite of Moulabhanj Igneous Complex, Orissa, India  [PDF]
D. Beura, D. Acharya, P. Singh, S. Acharya
Journal of Minerals and Materials Characterization and Engineering (JMMCE) , 2009, DOI: 10.4236/jmmce.2009.89064
Abstract: H?gbomite associated with vanadium bearing titaniferous magnetite has been identified in mafic-ultramafic suite of rocks of Moulabhanj, Orissa, India. The igneous complex intruded into granulite terrain of Eastern Ghat Super Group. The iron mineral assemblages are Ti-V magnetite, martite and ilmenite. H?gbomite occurs in association with Ti-V magnetite and exhibits both primary and secondary micro-textures. EPMA study confirms the presence of h?gbomite.
Anaesthesia and ophthalmic surgery
S Acharya
Nepalese Journal of Ophthalmology , 2009, DOI: 10.3126/nepjoph.v1i2.3695
Abstract: DOI: 10.3126/nepjoph.v1i2.3695 Nep J Oph 2009;1(2):152
Controllability of Neutral Impulsive Differential Inclusions with Non-Local Conditions  [PDF]
Dimplekumar N. Chalishajar, Falguni S. Acharya
Applied Mathematics (AM) , 2011, DOI: 10.4236/am.2011.212211
Abstract: In this short article, we have studied the controllability result for neutral impulsive differential inclusions with nonlocal conditions by using the fixed point theorem for condensing multi-valued map due to Martelli [1]. The system considered here follows the P.D.E involving spatial partial derivatives with α-norms.
Microwave-assisted chemical reduction routes for direct synthesis of Fe–Pt nanoparticles in ordered face centered tetragonal L10 phase
S. Acharya,K. Singh
Applied Nanoscience , 2011, DOI: 10.1007/s13204-011-0012-5
Abstract: In the present work, microwave-assisted chemical reduction route has been explored for the direct synthesis of face centered tetragonal (fct) L10 phase of Fe–Pt nanoparticles. Effects of microwave power and irradiation time on the growth process were investigated. Using this facile and high yield technique we could tune particle size from 7 to 17 nm. The as-prepared Fe–Pt NPs were observed in ordered fct L10 phase without any post-synthesis treatment. The particle size and magnetic properties of the as-prepared Fe–Pt were found to be very sensitive to the microwave irradiation power, while influence of exposure time was insignificant. The hysteresis measurements were performed at room temperature (300 K) to study magnetic properties of as-synthesized Fe–Pt as a function of crystallite size. All specimens of Fe–Pt were found to exhibit ferromagnetic behavior at room temperature. Coercivity and saturation magnetization were observed to be decreasing with diminishing particle size. The microwave-assisted route is found to be a simple technique for direct synthesis of metal alloys and may prove to be a potential tool of high density data storage materials such as Fe–Pt.
Urinary tract infection: current status.
Acharya V,Jadav S
Journal of Postgraduate Medicine , 1980,
A study of antimuscarinic agents on skeletal muscle of frog
Acharya S,Rao Subba
Journal of Postgraduate Medicine , 1977,
Abstract: Some of the known antimuscarinic agents were studied for their effect on the acetylcholine induced contraction of the super-fused skeletal muscle of frog, All drugs exhibited varying degrees of curarimimetic effect. During recovery from the drug effect, the tissue exhibited an increased sensitivity to the action o f acetyl-choline; in some instances it was immediate, but it was only at very small concentrations.
N=1 Heterotic-Supergravity Duality and Joyce Manifolds
B. S. Acharya
Physics , 1995,
Abstract: We construct the heterotic dual theory in four dimensions of eleven dimensional supergravity compactified on a particular Joyce manifold, $J$. In particular, $J$ is constructed from resolving fixed point singularities of orbifolds of the seven torus in such a way that one is forced to consider a generalised orbifold on the heterotic side. We conjecture that a heterotic dual exists for all the compact 7-manifolds of $G_{2}$ holonomy constructed by Joyce.
N=1 Heterotic/M-theory Duality and Joyce Manifolds
B. S. Acharya
Physics , 1996, DOI: 10.1016/0550-3213(96)00326-4
Abstract: We present an ansatz which enables us to construct heterotic/M-theory dual pairs in four dimensions. It is checked that this ansatz reproduces previous results and that the massless spectra of the proposed dual pairs agree. The new dual pairs consist of M-theory compactifications on Joyce manifolds of $G_2$ holonomy and Calabi-Yau compactifications of heterotic strings. These results are further evidence that M-theory is consistent on orbifolds. Finally, we interpret these results in terms of M-theory geometries which are K3 fibrations and heterotic geometries which are conjectured to be $T^3$ fibrations. Even though the new dual pairs are constructed as non-freely acting orbifolds of existing dual pairs, the adiabatic argument is apparently not violated.
Dirichlet Joyce Manifolds, Discrete Torsion and Duality
B. S. Acharya
Physics , 1996, DOI: 10.1016/S0550-3213(97)00163-6
Abstract: Using U-duality transformations we map perturbative Type IIA string theory compactified on a class of Joyce 7-manifolds to a D-strings on D-manifold description in Type IIB theory. For perturbative Type IIB theory on the same class of Joyce manifolds we use duality transformations to map to an M-theory, M-manifold description, which is an orientifold with fivebrane twisted sectors. D and M-manifold descriptions of discrete torsion are found. For the same class of compactifications we show that Type IIA/IIB theory on a Joyce orbifold without (with) discrete torsion is T-dual to Type IIB/IIA theory on the same orbifold with (without) discrete torsion. For this class of Type II compactifications this proves an extension of the Papadopoulos-Townsend conjecture, which states that the Type IIA and IIB theories compactified on the same Joyce 7-manifold are equivalent. Finally we note that the Papadopoulos-Townsend conjecture is a special case of the Generalised Mirror Conjecture.
N=1 M-theory-Heterotic Duality in Three Dimensions and Joyce Manifolds
B. S. Acharya
Physics , 1996,
Abstract: It is argued that $M$-theory compactified on {\it any} of Joyce's $Spin(7)$ holonomy 8-manifolds are dual to compactifications of heterotic string theory on Joyce 7-manifolds of $G_2$ holonomy.
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