1,075 research outputs found
Computational chemistry and molecular modeling : principles and applications / K.I. Ramachandran, G. Deepa, K. Namboori.
No full text"An exclusive URL (http://www.amrita.edu/cen/ccmm/) for this book with the required support materials has been provided for readers ..."--Preface.pharmacy bookfair2015Includes bibliographical references and index.xxi, 397 pages
Fig. 7. Telson and G1 in Description of a new species of Spiralothelphusa Bott, 1968, and redescription of Spiralothelphusa wuellerstorfi (Heller, 1862) (Decapoda: Brachyura: Gecarcinucidae)
No full textFig. 7. Telson and G1 in Spiralothelphusa species showing diagnostic features. – A, F, I. Spiralothelphusa gibberosa Pati & Sudha Devi, 2015, holotype, ♂ (28.0 × 23.0 mm) (ZSI-WRC C.1186). – B, K, M. S. wuellerstorfi (Heller, 1862). B. ♂ (37.5 × 27.1 mm) (ZSI-WRC C.1960). K, M. Lectotype, ♂ (37.4 × 28.5 mm) (NHMW CR 27063). – C. S. hydrodroma (Herbst, 1794), topotype, ♂ (27.2 × 21.4 mm) (ZMUC CRU 2824). – D, G. S. senex (Fabricius, 1798), lectotype, ♂ (25.9 × 20.3 mm) (ZMUC CRU 4626). – E, H. S. fernandoi Ng, 1994, holotype, ♂ (35.7 × 26.5 mm) (ZRC 1984.7547). – J. S. parvula (Fernando, 1961), paratype, ♂ (19.4 × 15.0 mm) (ZRC 1984.7887). – L, N. S. andhra sp. nov., holotype, ♂ (37.8 × 30.2 mm) (ZSI-FBRC INV/2256). A–B. Left G1, apical view. C, L. Right G1, dorsal view (horizontally flipped). D–F, J–K. Left G1, dorsal view. G–I, M–N. Pleonal somite 6 and telson. Scale bars: A–F, J–L = 1 mm; G–I, M–N = 5 mm. C–E, G–H, J adapted from Ng & Tay (2001) and I is adapted from Pati & Sudha Devi (2015).Published as part of Pati, Sameer K., Mandal, Sudipta & Jaiswal, Deepa, 2022, Description of a new species of Spiralothelphusa Bott, 1968, and redescription of Spiralothelphusa wuellerstorfi (Heller, 1862) (Decapoda: Brachyura: Gecarcinucidae), pp. 1-29 in European Journal of Taxonomy 798 on page 16, DOI: 10.5852/ejt.2022.798.1629, http://zenodo.org/record/629979
Identification of Android Malware Using Refined System Calls.
No full textThe ever increasing number of Android malware has always been a concern for cybersecurity professionals. Even though plenty of anti-malware solutions exist, we hypothesize that the performance of existing approaches can be improved by deriving relevant attributes through effective feature selection methods. In this paper, we propose a novel two-step feature selection approach based on Rough Set and Statistical Test named as RSST to extract refined system calls, which can effectively discriminate malware from benign apps. By refined set of system call, we mean the existence of highly relevant calls that are uniformly distributed thought target classes. Moreover, an optimal attribute set is created, which is devoid of redundant system calls. To address the problem of higher dimensional attribute set, we derived suboptimal system call space by applying the proposed feature selection method to maximize the separability between malware and benign samples. Comprehensive experiments conducted on three datasets resulted in an accuracy of 99.9%, Area Under Curve (AUC) of 1.0, with 1% False Positive Rate (FPR). However, other feature selectors (Information Gain, CFsSubsetEval, ChiSquare, FreqSel, and Symmetric Uncertainty) used in the domain of malware analysis resulted in the accuracy of 95.5% with 8.5% FPR. Moreover, the empirical analysis of RSST derived system calls outperformed other attributes such as permissions, opcodes, API, methods, call graphs, Droidbox attributes, and network traces
Study of nuclear tracks on different polycarbonate foils and their feasibility for use in personnel monitoring
No full textCR-39 (PADC) a Solid State Nuclear Track Detector., is used as a routine
personnel monitor. 1800 workers are being monitored quarterly for fast neutron using
CR-39 foils. These foils procured from Pershore Mouldings, UK are very expensive and
indigenous development will make the foils cost effective. The aim of this paper is
to find a suitable alternative to the imported CR-39 foils for use in personnel
monitoring. The foils from three different manufacturers have been compared with the
CR-39 foils from Pershore Moulding, UK, presently in use. Out of the three, only
sample no 1 is promising. It has a background and sensitivity comparable with CR-39
presently used. The sample 2 is CR-39 being developed in India, has a relatively
high background and poor sensitivity. Efforts are being made to improve the quality
of this sample. The sample 3 was a poly carbonate from local manufacturer which
produced very few tracks and the standard deviation of track counts was very large
and hence not useful for Personnel Monitoring.Study of nuclear tracks on different polycarbonate foils and their feasibility for
use in personnel monitoring
V Jayalaskmi*, Rupali Rohatgi, Deepa Sathian, P K Marathe, Sarala Nair,
G Chourasiya and S Kannan
Radiological Physics and Advisory Division, Bhabha Atomic Research Centre,
Mumbai-400 085, India
E-mail : [email protected] Physics and Advisory Division, Bhabha Atomic Research Centre,
Mumbai-400 085, Indi
Reduction of background in CR-39 SSNTD using chemical pre-etching methods
No full textPresently, CR-39 Solid State Nuclear Track Detectors (SSNTD) is being
used for Fast Neutron Personnel Monitoring in India. Individual detectors are cut
manually from CR-39 sheets. Laser-cutting of the sheets will ensure precision and
also save on the laborious efforts involved in sheet cutting. It was observed that
there is a slight increase in background tracks due to laser-cutting. Studies were
carried out on the effect of chemical pre-etching at higher temperatures in
properties of CR-39 such as the background, sensitivity and minimum measurable dose.
For this purpose a pre-etch step was included in the normal processing of the CR-39
foils in an elevated temperature electrochemical cell (ETECE cell) and the duration
for pre-etch step at elevated temperature was optimized.
Samples of CR-39 exposed to dose equivalents ranging from 1 mSv to 10 mSv using
Am-Be neutron source were processed by both the methods, under normal processing
using ECE cell and in the optimized chemical pre-etch followed by normal processing.
The dose responses of CR-39 processed by both methods are compared in this paper.Reduction of background in CR-39 SSNTD using chemical pre-etching methods
Rupali Rohatgi*, Deepa Sathian, V Jayalakshmi, Sarala Nair, P K Marathe,
G Chaurasiya and S Kannan
Personnel Monitoring Section, RP & AD, Bhabha Atomic Research Centre, Mumbai-400
094, India
E-mail : [email protected] Monitoring Section, RP & AD, Bhabha Atomic Research Centre, Mumbai-400
094, Indi
The relative effectiveness and costs of contract and regular teachers in India
No full textWhile use of contract teachers provides a low-cost way to increase teacher numbers, it raises the quality concern that these less trained teachers may be less effective. We estimate the causal contract-teacher effect on student achievement using school fixed effects and value-added models of the education production function, using Indian data. We allow for both homogenous and heterogeneous treatment effects, to highlight the mechanisms through which the contract teacher effect works. We also present school fixed effects teacher pay equations and predict achievement marks per Rupee spent on regular and contract teachers. We find that despite being paid just a third of the salary of regular teachers with similar observed characteristics, contract teachers produce higher student learning.Student achievement, contract teachers, India
Ensuring The Homogeneity OF Spray Pyrolised SnS Thin Films Employing XPS Depth Profiling
No full textSnS thin films were prepared using chemical spray pyrolysis (CSP) technique. p-type SnS films with direct band gap of 1.33 eV and having very high absorption coefficient were obtained with the optimized deposition conditions. In this paper we focus on investigating the uniformity and phase purity of the hence deposited SnS films employing Raman and X-ray Photoelectron Spectroscopy (XPS) analysis. Raman Spectra of the films had only single peak corresponding to the Raman active Ag mode at 224 cm(-1) which is characteristic for phase-pure SnS thin films. Detailed XPS analysis on these samples were performed by scanning the peaks for Sn, S, and O with high resolution to estimate the chemical states and composition. Employing Ar-ion sputtering, the depth profiles showing variation in concentration and binding energies of S, Sn, O over the sample thickness were obtained and the uniformity in composition along the thickness has been discussed in detail
Type-B response regulators ARR1 and ARR12 regulate expression of AtHKT1;1 and accumulation of sodium in Arabidopsis shoots
No full textSoil salinity affects a large proportion of the land worldwide, forcing plants to evolve a number of mechanisms to cope with salt stress. Cytokinin plays a role in the plant response to salt stress, but little is known about the mechanism by which cytokinin controls this process. We used a molecular genetics approach to examine the influence of cytokinin on sodium accumulation and salt sensitivity in Arabidopsis thaliana. Cytokinin application was found to increase sodium accumulation in the shoots of Arabidopsis, but had no significant affect on the sodium content in the roots. Consistent with this, altered sodium accumulation phenotypes were observed in mutants of each gene class of the cytokinin signal transduction pathway, including receptors, phospho-transfer proteins, and type-A and type-B response regulators. Expression of the gene encoding Arabidopsis high-affinity K(+) transporter 1;1 (AtHKT1;1), a gene responsible for removing sodium ions from the root xylem, was repressed by cytokinin treatment, but showed significantly elevated expression in the cytokinin response double mutant arr1-3 arr12-1. Our data suggest that cytokinin, acting through the transcription factors ARR1 and ARR12, regulates sodium accumulation in the shoots by controlling the expression of AtHKT1;1 in the roots.Michael G. Mason, Deepa Jha, David E. Salt, Mark Tester, Kristine Hill, Joseph J. Kieber and G. Eric Schalle
Root plasma membrane transporters controlling K+/Na+ homeostasis in salt-stressed barley
No full textCopyright © 2007 American Society of Plant BiologistsPlant salinity tolerance is a polygenic trait with contributions from genetic, developmental, and physiological interactions, in addition to interactions between the plant and its environment. In this study, we show that in salt-tolerant genotypes of barley (Hordeum vulgare), multiple mechanisms are well combined to withstand saline conditions. These mechanisms include: (1) better control of membrane voltage so retaining a more negative membrane potential; (2) intrinsically higher H+ pump activity; (3) better ability of root cells to pump Na+ from the cytosol to the external medium; and (4) higher sensitivity to supplemental Ca2+. At the same time, no significant difference was found between contrasting cultivars in their unidirectional 22Na+ influx or in the density and voltage dependence of depolarization-activated outward-rectifying K+ channels. Overall, our results are consistent with the idea of the cytosolic K+-to-Na+ ratio being a key determinant of plant salinity tolerance, and suggest multiple pathways of controlling that important feature in salt-tolerant plants.Zhonghua Chen, Igor I. Pottosin, Tracey A. Cuin, Anja T. Fuglsang, Mark Tester, Deepa Jha, Isaac Zepeda-Jazo, Meixue Zhou, Michael G. Palmgren, Ian A. Newman and Sergey Shabal
Emerg Infect Dis
No full textWe have identified circulation of 3 genogroups of enterovirus (EV) A71 in India. A new genogroup (proposed designation G) was discovered during this study. We isolated genogroups D and G in wide geographic areas but detected subgenogroup C1 only in 1 focus in western India. A systematic nationwide search for EV-A71 is warranted
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