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Shiv Nadar University

(SoNS) School of Natural Sciences

This paper examines the features of a generalized position-dependent mass Hamiltonian Hm in a supersymmetric framework in which the constraints of pseudo-Hermiticity and [formula omitted] are naturally embedded. Different representations of the charge operator are considered that lead to new mass-deformed superpotentials [formula omitted] which are inherently [formula omitted]-symmetric. The qualitative spectral behavior of Hm is studied and several interesting consequences are noted. © 2013, American Institute of Physics. All rights reserved.

Physics

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Journal of Mathematical Physics

[formula omitted]-conserved effective mass Hamiltonians through first and higher order charge operator [formula omitted] in a supersymmetric framework

In this paper a modified design of a solar Parabolic Trough Thermoelectric Receiver (PTTR) tube is presented and its technical feasibility is evaluated theoretically. The innovative driving concept is its cylindrical tri-segmented receiver tube coupled with a thermoelectric generator (TEG). The system is analyzed numerically for a set of operation and design parameters and the results are discussed. This work opens up a promising option which has the potential to improve the conversion of solar thermal energy into electricity through parabolic trough system. We also explored the possibility of multi-component energy conversion using the modified structure. © 2013 IEEE.

Proceedings of the 2013 International Conference on Green Computing, Communication and Conservation of Energy, ICGCE 2013

An innovative design of a tri-segmented parabolic trough solar thermoelectric receiver tube for multi-component energy conversion

We show bounds on five- and six-dimensional universal extra dimension (UED) models from the latest results of the Higgs searches at the LHC and from the electroweak precision data for the S and T parameters. We consider the minimal UED model in five dimensions and the ones in six dimensions, compactified on T2/Z2, T2/(Z2×Z2′), T2/Z4, S2, S2/Z2, the real projective plane, and the projective sphere. The highest possible ultraviolet cutoff scale for each UED model is evaluated from the electroweak vacuum stability by solving the renormalization group equation of the Higgs self-coupling. This scale turns out to be lower than the conventional one obtained from the perturbativity of the gauge coupling. The resultant 95% C.L. lower bounds on the first Kaluza-Klein scale from the LHC results and from the S, T analysis are 600 and 700 GeV in the minimal UED model, while those in the six-dimensional UED models are 800-1300 GeV and 900-1500 GeV, respectively. © 2013 American Physical Society.

Physical Review D - Particles, Fields, Gravitation and Cosmology

Universal extra dimensions after Higgs discovery

Vaccination is a cornerstone of infectious disease prevention. However, individual vaccinating behaviour does not always result in population-level vaccine coverage patterns that are optimal for protecting public health. For example, vaccine coverage may fall below the elimination threshold due to nonvaccinators who free-ride on the herd immunity provided by vaccinators. Routine vaccination programs for many paediatric infectious diseases now have an almost worldwide coverage, but vaccine scares fuelled by such behaviours threaten eradication goals. This free-riding behaviour can be seen as a manifestation of policy resistance, where humans respond to an intervention in such a way that tends to undermine the intervention. However, policy resistance is only one such example of the types of dynamics that emerge from the interaction between vaccinating behaviour and disease incidence or prevalence. Here we explore four types of emergent dynamics of behaviour-incidence systems: policy resistance, policy reinforcement, outcome inelasticity, and outcome variability. We discuss examples of each of these dynamics in the behaviour-incidence modelling literature, and suggest potential implications for vaccination policy. © 2013 Springer Science+Business Media New York. All rights reserved.

Mathematics

Modeling the Interplay Between Human Behavior and the Spread of Infectious Diseases

Emergent dynamical features in behaviour-incidence models of vaccinating decisions

The first high-resolution neutron protein structure of perdeuterated rubredoxin from Pyrococcus furiosus (PfRd) determined using the new IMAGINE macromolecular neutron crystallography instrument at the Oak Ridge National Laboratory is reported. Neutron diffraction data extending to 1.6514;Å resolution were collected from a relatively small 0.714;mm3 PfRd crystal using 2.514;d (6014;h) of beam time. The refined structure contains 371 out of 391, or 95%, of the D atoms of the protein and 58 solvent molecules. The IMAGINE instrument is designed to provide neutron data at or near atomic resolution (1.514;Å) from crystals with volume &lt;1.014;mm3 and with unit-cell edges &lt;10014;Å. Beamline features include novel elliptical focusing mirrors that deliver neutrons into a 2.0 × 3.214;mm focal spot at the sample position with full-width vertical and horizontal divergences of 0.5 and 0.6°, respectively. Variable short- and long-wavelength cutoff optics provide automated exchange between multiple-wavelength configurations (λmin = 2.0, 2.8, 3.314;Å to λmax = 3.0, 4.0, 4.5, ∼2014;Å). These optics produce a more than 20-fold increase in the flux density at the sample and should help to enable more routine collection of high-resolution data from submillimetre-cubed crystals. Notably, the crystal used to collect these PfRd data was 5-10 times smaller than those previously reported. © 2013 International Union of Crystallography Printed in Singapore - all rights reserved. © 2013.

Chemistry

Acta Crystallographica Section D: Biological Crystallography

The IMAGINE instrument: First neutron protein structure and new capabilities for neutron macromolecular crystallography

An electron rich porous metal–organic framework (MOF) has been synthesized, which acts as an effective heterogeneous catalyst for Diels–Alder reactions through encapsulation of the reactants in confined nano-channels of the framework. {\textcopyright} 2013 The Royal Society of Chemistry.

Chemical Communications

An electron rich porous extended framework as a heterogeneous catalyst for diels–alder reactions

Two new anthracene-functionalized fluorescent tris-imidazolium salts have been synthesized, characterized and proven to be selective sensors for picric acid, which is a common constituent of many powerful explosives. Theoretical studies revealed an unusual ground-state electron transfer from picrate anion to the sensor molecules. {\textcopyright} 2013 American Chemical Society.

Journal of Organic Chemistry

Fluorescent tris-imidazolium sensors for picric acid explosive

A statistical study of pulsing hiss emissions observed during daytime at low latitude Indian ground stations Jammu (geomag. lat., 22 26′N; L = 1.17) and Srinagar (geomag. lat., 24 10′N; L = 1.28) is presented. From the detailed statistical analysis of the observed data it is found that the reported day time pulsing hiss emissions is a rare phenomena at low latitudes. The spectrograms of pulsing hiss emissions observed during daytime clearly show band limited spectrums regularly pulsing with almost equal period of the order of few seconds in the frequency range of 300 Hz-8 kHz. The intensity and bandwidth of daytime pulsing hiss remain almost constant in the frequency range of 300 Hz-8 kHz in clear contrast to the pulsing hiss emission observed during nighttime at low latitudes. The daytime pulsing hiss time period is about 0.5 s which is small in comparison to time period (~1.43 s) of the low latitude pulsing hiss observed during nighttime. The generation and propagation mechanisms of pulsing hiss emissions are discussed. The micropulsations propagating along the geomagnetic field lines modulate the growth rate of the wave resulting in hiss intensity. © 2013 Indian Association for the Cultivation of Science.

Life Sciences

Indian Journal of Physics

A statistical study of daytime pulsing hiss emission at low latitudes

GW2, a grain weight quantitative trait locus (QTL) in rice encodes a ring type E-3 ubiquitin ligase. A single nucleotide deletion at the 346th nucleotide position in the ligase domain of GW2 was earlier reported to result in higher grain weight in rice. The present study aimed at validating the known functional polymorphism and identifying additional natural genetic variation if any, in the region that included the functional domain of GW2 in a set of indica and aromatic genotypes for which ninety three rice genotypes were phenotyped for grain length, grain width and 100 grain weight. A wide range of variation was observed for these traits. PCR amplification and sequencing of GW2 target region revealed absence of insertion/deletion (InDel) at the 346th position which suggested that the genetic variation in grain weight in Basmati and non-Basmati indica genotypes was not explained by this InDel. However, four new single nucleotide polymorphisms (SNPs) were discovered at nucleotide positions 406, 461, 466 and 501 in the fifth exon and one InDel each in second and fourth introns. Only two of these SNPs, at positions 461 and 501 led to amino acid substitutions. A total of 10 haplotypes were constructed based on these four SNPs which could be regrouped into four categories based on their amino acid substitutions. Association genetic analysis of these haplotypes with different grain traits revealed a moderate association with grain width (R2 = 0.18 at P &lt; 0.05). Thirteen haplotypes constructed using both intronic and exonic polymorphisms did not have any association with grain traits. © 2012 Springer Science+Business Media Dordrecht.

Euphytica

Haplotype structure in grain weight gene GW2 and its association with grain characteristics in rice

Histidinolphosphate aminotransferase (HisC; Rv1600) from Mycobacterium tuberculosis was overexpressed in M. smegmatis and purified to homogeneity using nickel-nitrilotriacetic acid metal-affinity and gel-filtration chromatography. Diffraction-quality crystals suitable for X-ray analysis were grown by the hanging-drop vapour-diffusion technique using 30% polyethylene glycol monomethyl ether 2000 as the precipitant. The crystals belonged to the hexagonal space group P3221, with an unusual high solvent content of 74.5%. X-ray diffraction data were recorded to 3.08 {\AA} resolution from a single crystal using in-house Cu K radiation. The structure of HisC was solved by the molecular-replacement method using its Corynebacterium glutamicum counterpart as a search model. HisC is a dimer in the crystal as well as in solution. {\textcopyright} 2013 International Union of Crystallography.