Institution
Vikram Sarabhai Space Centre
Facility•Thiruvananthapuram, India•
About: Vikram Sarabhai Space Centre is a facility organization based out in Thiruvananthapuram, India. It is known for research contribution in the topics: Aerosol & Ultimate tensile strength. The organization has 2092 authors who have published 3058 publications receiving 47975 citations. The organization is also known as: VSSC.
Papers published on a yearly basis
Papers
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TL;DR: The proposed radial basis function-least square error projection cascade network for sparse signal Recovery (RASR) utilizes the smoothed L0 norm optimization, L2 leastsquare error projection and feedback network model to improve the signal recovery performance over the existing CSIANN algorithm.
18 citations
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TL;DR: In this article, the thermal degradation of polymethyl methacrylate (PMMA) in the presence of polysulfide polymers, namely, poly( styrene disulfide) (PSD) and poly(styrene tetrasulfide (PST), was studied using thermogravimetry (TG) and direct pyrolysis-mass spectrometric (DP-MS) analysis.
Abstract: The thermal degradation of poly(methyl methacrylate) (PMMA) in the presence of polysulfide polymers, namely, poly( styrene disulfide) (PSD) and poly(styrene tetrasulfide) (PST) was studied using thermogravimetry (TG) and direct pyrolysis-mass spectrometric (DP-MS) analysis. Both PSD and PST were found to stabilizethe PMMA degradation, which was explained by both radical recombination and a chain-transfer mechanism. (C) 1997 John Wiley & Sons, Inc.
18 citations
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TL;DR: In this paper, pendent tert-butyl groups (PENTOH) were synthesized by the nucleophilic aromatic substitution reaction of 2,6-dichlorobenzonitrile with tertbutyl hydroquinone in N-methyl-2-pyrrolidone medium with anhydrous potassium carbonate as a catalyst at 200°C in a nitrogen atmosphere.
Abstract: Hydroxy-terminated poly(arylene ether nitrile) oligomers with pendent tert-butyl groups (PENTOH) were synthesized by the nucleophilic aromatic substitution reaction of 2,6-dichlorobenzonitrile with tert-butyl hydroquinone in N-methyl-2-pyrrolidone medium with anhydrous potassium carbonate as a catalyst at 200°C in a nitrogen atmosphere. The PENTOH oligomers were blended with diglycidyl ether of bisphenol A epoxy resin and cured with 4,4′-diaminodiphenyl sulfone. The curing reaction was monitored with infrared spectroscopy and differential scanning calorimetry. The morphology, fracture toughness, and thermomechanical properties of the blends were investigated. The scanning electron micrographs revealed a two-phase morphology with a particulate structure of the PENTOH phase dispersed in the epoxy matrix, except for the epoxy resin modified with PENTOH with a number-average molecular weight of approximately 4000. The storage modulus of the blends was higher than that of the neat epoxy resin. The crosslink density calculated from the storage modulus in the rubbery plateau region decreased with an increase in PENTOH in the blends. The fracture toughness increased more than twofold with the addition of PENTOH oligomers. The tensile strength of the blends increased marginally, whereas the flexural strength decreased marginally. The dispersed PENTOH initiated several toughening mechanisms, which improved the fracture toughness of the blends. The thermal stability of the epoxy resin was not affected by the addition of PENTOH to the epoxy resin. © 2007 Wiley Periodicals, Inc. J Appl Polym Sci 2007
18 citations
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TL;DR: In this article, an experimental procedure for the determination of overall kinetic parameters for the exothermic decomposition reaction of nitramine propellant was described, which is applicable to reactions whose behaviour can be described by the Arrhenius equation and the general rate law.
Abstract: The paper describes an experimental procedure for the determination of overall kinetic parameters for the exothermic decomposition reaction of nitramine propellant. The kinetic parameters can be obtained through the use of differential thermal analysis (DTA), differential scanning calorimetry (DSC) or thermogravimetric analysis (TGA) methods. The procedure is applicable to reactions whose behaviour can be described by the Arrhenius equation and the general rate law. In the present work, DSC technique has been used for the evaluation of Arrehenius activation parameters and specific rate constants for thermal decomposition of a typical nitramine propellant. The kinetic parameters were computed by Ozawa and Kissinger methods for comparison. The activation energy value obtained from the Ozawa method is refined by an iteration procedure using Doyle approximation for the Arrhenius temperature integral p(x).
18 citations
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TL;DR: The short wave direct Aerosol Radiative Forcing (ARF) at a semi urban coastal location near Chennai (1281°N, 8003°E, ∼45m aml), a mega city on the east coast of India has been estimated for all the four seasons in the year 2013 using the SBDART (SBDART) model as mentioned in this paper.
18 citations
Authors
Showing all 2111 results
Name | H-index | Papers | Citations |
---|---|---|---|
M. Santosh | 103 | 1344 | 49846 |
Sabu Thomas | 102 | 1554 | 51366 |
S. Suresh Babu | 70 | 498 | 17113 |
K. Krishna Moorthy | 54 | 263 | 9749 |
Sathianeson Satheesh | 53 | 172 | 11099 |
M. Y. Hussaini | 49 | 207 | 16794 |
J.R. Banerjee | 44 | 146 | 5620 |
C. P. Reghunadhan Nair | 37 | 181 | 4825 |
K. N. Ninan | 36 | 159 | 4156 |
Anil Bhardwaj | 35 | 230 | 4527 |
Ivatury S. Raju | 33 | 121 | 6626 |
Venkata Sai Kiran Chakravadhanula | 32 | 102 | 3011 |
P.K. Sinha | 32 | 118 | 2918 |
J.-P. St.-Maurice | 31 | 113 | 3446 |
Subramaniam Gopalakrishnan | 28 | 123 | 2951 |