8,344 research outputs found
Sahoo-Supplement Fig 2.pdf
No full textMicro-architectural
parameters of iliac crest bone evaluated by µCT
(a)
3-D µCT images showing a normal bone and gross micro-architectural
deterioration in the proband’s bone, (b)
All parameters of cortical bone microarchitecture; T.Ar (periosteal area), B.Ar
(cortical mean cross-section area), Cs.Th (cortical thickness), T.Pm
(periosteal perimeter), and B.Pm (cortical bone perimeter) are significantly
lower in the proband compared to age and sex-matched healthy control, (c) Parameters of trabecular bone microarchitecture; Tb.Th (trabecular
thickness), and Tb.N (trabecular number) are decreased, while Tb.Sp (trabecular
separation) and SMI (structure model index) are increased in the proband’s
bone. All values are expressed as mean ± S.E.
*
p<0.05 and ** p<0. 01versus control</p
Synthesis of Molecular Rulers to Study Distance and Orientation Dependent Förster Resonance Energy Transfer (FRET)
No full textSahoo D. Synthesis of Molecular Rulers to Study Distance and Orientation Dependent Förster Resonance Energy Transfer (FRET). Bielefeld: Universität Bielefeld; 2019
STEEL SHEAR PANELS AS RETROFITTING SYSTEM OF EXISTING MULTI-STORY RC BUILDINGS: CASE STUDIES
No full textThe seismic retrofitting of existing reinforced concrete buildings is currently a major economic and social activities for the redevelopment of congested urban areas. Innovative reversible technologies by metal devices are capable of protecting buildings from damage, providing high levels of structural safety. The current paper is framed within this context, where steel plate shear walls (SPSWs) as retrofitting system of multi-story residential RC buildings, designed for vertical loads and located in the historic center area of Torre del Greco (Naples, Italy), have been used. The vulnerability analysis performed on the inspected buildings have shown their inability to withstand seismic actions. Therefore, the retrofitting design of such buildings through partial bay and full bay SPSWs has been done. The retrofitted buildings behaviour has been assessed through numerical analysis carried out in the non-linear field. The achieved results have shown a significant improvement of the structural performance of the tested improved buildings in terms of strength and stiffness. As a further research development, the available information on the design of SPSWs for retrofitting existing RC buildings will allow to design useful design charts capable of providing the optimal plate geometric dimensions as a function of predetermined performance targets
Real-space Manifestations of Bottlenecks in Turbulence Spectra
No full textAn energy-spectrum bottleneck, a bump in the turbulence spectrum between the inertial and dissipation ranges, is shown to occur in the non-turbulent, one-dimensional, hyperviscous Burgers equation and found to be the Fourier-space signature of oscillations in the real-space velocity, which are explained by boundary-layer-expansion techniques. Pseudospectral simulations are used to show that such oscillations occur in velocity correlation functions in one- and three-dimensional hyperviscous hydrodynamical equations that display genuine turbulence
On the role of the helicity in the energy transfer in three-dimensional turbulence
No full textBehavior of the turbulent flows could be changed by changing the nature of the external force or the confining geometry which essentially results in breaking some of the symmetries of the ideal homogeneous and isotropic flows. In a numerical simulation, however, it is possible to selectively break symmetries of the Navier-Stokes equations with other constraints like helicity. In a recent [1] simulation of a decimated version of the incompressible three dimensional Navier-Stokes equations, where helicity was maintained sign-definite using a helical projection, a reversal of energy cascade similar to two-dimensional Navier-Stokes equations was observed. The sign- definite helicity breaks the parity symmetry of the flow. It is one of the important symmetries of the flow that contributes to the forward energy cascade in three dimensional Navier-Stokes equations. In our study we measure the degree to which the parity symmetry controls the direction of the cascade. We introduce a mechanism in which the parity is broken stochastically but in a time frozen manner with helical constraints. We keep triadic interactions in Fourier space involving modes with definite sign of helicity and decimate the triads of other modes with opposite sign of helicity with a fixed probability. We studied the cascade of energy in three dimensional turbulence by changing the relative weight between positive and negative helicity modes. We present the results from our recent simulations
A new species and typification in Pedicularis series Curvipes (Orobanchaceae)
No full textPedicularis series Curvipes, of the family Orobanchaceae consisting of three species, is mainly distributed in eastern Himalaya, P. curvipes and P. nagaensis are found distributed from Sikkim to Manipur and P. amplicollis is reported from Bhutan. In the present study, a new taxon, closely related to P. amplicollis, is described from Dzükou valley, Manipur, and illustrated here as P. husainiana P.Agnihotri, D. Husain, D. Sahoo and S.K. Barik. Additionally, the lectotype of P. curvipes is designated here
Fig. 2 in Description of a New Mangrove Root Dwelling Species of Teleotanais (Crustacea: Peracarida: Tanaidacea) from India, with a Key to Teleotanaidae
No full textFig. 2. Teleotanais indiaensis sp. nov. paratype. A, left mandible; B, right mandible; C, labium; D, maxillule, endite; E, same, palp; F, maxilliped; G, epignath; H, pleopod; I, uropod. Scale bars 0.1 mm.Published as part of Larsen, Kim, Sahoo, Gobardhan & Ansari, Zakir Ali, 2013, Description of a New Mangrove Root Dwelling Species of Teleotanais (Crustacea: Peracarida: Tanaidacea) from India, with a Key to Teleotanaidae, pp. 237-243 in Species Diversity 18 on page 240, DOI: 10.12782/sd.18.2.237, http://zenodo.org/record/573730
Reappraisal of p,t-odd parameters from the improved calculation of electric dipole moment of 225ra atom
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Previous issue date: 24The parity and time-reversal symmetry violating electric dipole moments (EDMs) of diamagnetic atoms have the potential to probe physics beyond TeV scale. EDMs of atomic systems arise from the nuclear Schiff moment (NSM), , and the tensor-pseudotensor (T-PT) electron-nucleus (e-N) interaction that is characterized by its coupling coefficient, . A combination of high-precision experiment and relativistic many-body theory gives upper limits on these two quantities. Such limits aid in extracting bounds on EDMs of neutron, , and proton, , chromo-EDMs, and the quantum chromodynamics parameter, .
Previous calculations on these quantities using relativistic coupled-cluster (RCC) theory differ by about 40 percent, as compared to the results obtained from other variants of relativistic many-body methods \footnote{Y. Singh and B. K. Sahoo, Phys. Rev. A \textbf{92}, 022502 (2015).}. In this work, we employ the recently developed relativistic normal coupled-cluster theory \footnote{B. K. Sahoo and B. P. Das Phys. Rev. Lett. \textbf{120}, 203001 (2018).}, which alleviates the deficiencies of RCC method, to obtain the EDM of Ra, and combine it with the latest measurement to obtain limits on and . Further, taking into account the enhancement to EDM due to octuple moment of Ra, these limits are revised to and , with being the nuclear Pauli spinor. The accuracy of our results is corroborated by the dipole polarizability, which is obtained as 257(8) .
Our EDM results, in combination with measurement, are about 8\% and 28\% improvements over the limits that were reported using the relativistic coupled-cluster theory for the NSM and T-PT e-N coupling coefficient, respectively. Further combining with the nuclear calculations, we infer the following limits: , , , and the combined up- and down- quark chromo-EDMs . Though these bounds are not competitive at present with the current-best limits acquired from Hg atom, they can be bettered when the measurement of EDM in Ra improves by four orders
Swift heavy ion beam induced recrystallization of amorphous Si layers
No full textThis paper focuses on the role of electronic energy loss in ion beam induced epitaxial crystallization for which swift heavy ions (100 MeV Ag7+) have been used. We observed good epitaxial crystallization at 473-623 K, which is a much lower temperature regime as compared to the one needed for conventional solid phase epitaxial growth. A systematic planar recrystallization has been observed as a function of temperature giving rise to an activation energy of 0.25 +/- 0.02 eV. A possible mechanism of recrystallization is discussed on the basis of the production of vacancies along the track of the swift heavy ion and their migration at elevated temperatures. (c) 2005 Elsevier B.V. All rights reserved
Essays on the Indian Economy: Competitive Pressure, Productivity and Performance.
No full textIndia undertook a drastic economic reform program in 1991, with the significant objectives of removing existing inefficiencies and enhancing global competitiveness. A competitive environment is a prerequisite condition for gaining higher productivity. The main desired role of economic liberalization is to enhance the efficient utilization of inputs with relaxing constraints input use and technology choices and gains from international trade by bringing global competitive pressure to the economy. The dissertation proposes a macro productivity-efficiency analysis while taking care of the inter-linkages in the economy. This is extended to address to a few important issues of the Indian economy, viz. income distribution, poverty, wage inequality between skilled and unskilled labour, returns to education and performance of formal and informal sectors. These above-mentioned issues are captured with the help of three independent essays. The analytical tool is based on a general equilibrium-activity analysis where welfare maximization subject to input and trade constraints results in competitive equilibrium. Competitive input prices reflect factor productivity. Incorporation of input-output framework captures the inter-sectoral linkages. The social accounting matrix (SAM), which plays an important role in establishing inter-linkages in the economy by combining input-output analysis and household income distribution, provides the basic data set for our model.
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