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Covalent Bond Based Android Malware Detection Using Permission and System Call Pairs

Computers, Materials & Continua 2024年第3期78卷 4283-4301页

作者： Rahul Gupta k.pil sharma R.k.Garg Department of Information Technology Delhi Technological UniversityNew Delhi110042India Department of Mechanical Engineering Deenbandhu Chhotu Ram University of Science and TechnologyMurthal131039India

The prevalence of smartphones is deeply embedded in modern society,impacting various aspects of our *** versatility and functionalities have fundamentally changed how we communicate,work.seek.entertainment,and access *** the many smartphones available,those operating on the Android platform dominate,being the most widely used *** widespread adoption of the Android OS has significantly contributed to increased malware attack. targeting the Android ecosystem in recent ***,there is an urgent need to develop new methods for detecting Android *** literature contains numerous work. related to Android malware *** far as our understanding extends,we are the first ones to identify dangerous combinations of permissions and system calls to uncover malicious behavior in Android *** introduce a novel methodology that pairs permissions and system calls to distinguish between benign and malicious *** approach combines the advantages of static and dynamic analysis,offering a more comprehensive understanding of an application’s *** establish covalent bonds between permissions and system calls to assess their combined *** introduce a novel technique to determine these pairs’Covalent Bond Strength *** pair is assigned two scores,one for malicious behavior and another for benign *** scores serve as the basis for classifying applications as benign or *** correlating permissions with system calls,the study enables a detailed examination of how an app utilizes its requested permissions,aiding in differentiating legitimate and potentially harmful *** comprehensive analysis provides a robust framework.for Android malware detection,mark.ng a significant contribution to the *** results of our experiments demonstrate a remark.ble overall accuracy of 97.5%,surpassing various state-of-the-art detection techniques proposed in the current literature.

关键词： Android malware android security hybrid analysis permission and system call pairs

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A brief review on/μSR studies of unconventional Fe-and Cr-based superconductors

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Science China(Physics,Mechanics & Astronomy) 2018年第12期61卷 3-24页

作者： A.Bhattacharyya D.T.Adroja M.Smidman V.k.anand ISIS Facility Rutherford Appleton LaboratoryChiltonDidcot OxonOX11OQXUK Department of Physics Ramakrishna Mission Vivekananda Educational and Research InstituteHowrah 711202India Highly Correlated Matter Research Group Physics DepartmentUniversity of JohannesburgAuckland Park 2006South Africa Center for Correlated Matter and Department of Physics Zhejiang UniversityHangzhou 310058China Helmholtz-Zentrum Berlin fur Materialien und Energie GmbH Berlin D-14109Germany

Muon spin relaxation/rotation(μSR) is a vital technique for probing the superconducting gap structure, pairing symmetry and time reversal symmetry break.ng, enabling an understanding of the mechanisms behind the unconventional superconductivity of cuprates and Fe-based high-temperature superconductors, which remain a puzzle. Very recently double layered Fe-based superconductors having quasi-2 D crystal structures and Cr-based superconductors with a quasi-1D structure have drawn considerable attention. Here we present a brief review of the characteristics of a few selected Fe-and Cr-based superconducting materials and highlight some of the major outstanding problems, with an emphasis on the superconducting pairing symmetries of these materials. We focus on μSR studies of the newly discovered superconductors ACa_2Fe_4As_4F_2(A = k. Rb, and Cs), ThFeAsN, and A_2Cr_3As_3(A = k. Cs), which were used to determine the superconducting gap structures, the presence of spin fluctuations, and to search for time reversal symmetry break.ng in the superconducting states. We also briefly discuss the results of μSR investigations of the superconductivity in hole and electron doped BaFe_2As_2.

关键词： unconventional superconductors iron-based superconductors Cr-based superconductors superconducting pairing symmetry time reversal symmetry muon spin rotation/relaxation

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Study of Cold Fusion Reactions Using Collective Clusterization Approach

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Communications in Theoretical Physics 2017年第10期67卷 505-517页

作者： Gurjit k.ur k.randeep Sandhu Manoj k.sharma School of Physics and Materials Science Thapar University

Within the framework.of the dynamical cluster decay model （DCM）, the in evaporation cross-sections （σ1n） of cold fusion reactions （Pb and Bi targets） are calculated for ZCN = 104-113 superheavy nuclei. The calculations are carried out in the fixed range of excitation energy ECN = 15 ± 1 MeV, so that the comparative analysis of reaction dynamics can be work.d out. First of all, the fission barriers （Bf ） and neutron separation energies （S1n） are estimated to account the decreasing cross-sections of cold fusion reactions. In addition to this, the importance of hot optimum orientations of β24-deformed nuclei over cold one is explored at fixed angular momentum and neck.length parameters. The hot optimum orientations support all the target-projectile （t,p） combinations, which are explored experimentally in the cold fusion reactions. Some new target-projectile combinations are also predicted for future exploration. Further, the In cross-sections are addressed for ZCN = 104-113 superheavy nuclei at comparable excitation energies which show the decent agrement with experimental data upto ZCN = 109 nuclei. Finally, to understand the dynamics of higher-Z superheavy nuclei, the cross-sections are also calculated at maximum available energies around the Coulomb barrier and the effect of non-stick.ng moment of inertia （INS） is also investigated at these energies.

关键词： cold fusion reactions ln-decay cross-sections fragment mass distribution

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Biosorption of Ni(Ⅱ) ions from aqueous solution using modified Aloe barbadensis Miller leaf powder

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Water Science and Engineering 2019年第1期12卷 27-36页

作者： Shweta Gupta S.k.sharma Arinjay k.mar University School of Chemical Technology Guru Gobind Singh Indraprastha University

This study aimed to investigate the biosorption potential of Na2CO3-modified Aloe barbadensis Miller (Aloe vera) leaf (MABL) powder for removal of Ni(II) ions from a synthetic aqueous solution. Effects of various process parameters (pH, equilibrium time, and temperature) were investigated in order to optimize the biosorptive removal. The maximum biosorption capacity of MABL was observed to be 28.986 mg/g at a temperature of 303 k. a biosorbent dose of 0.6 g, a contact time of 90 min, and a pH value of 7. Different k.netic models (the pseudo-first-order, pseudo-second-order, Elovich, and intraparticle diffusion models) were evaluated. The pseudo-second-order k.netic model was found to be the best fitted model in this study, with a coefficient of determination of R^2 =0.974. Five different isotherm models (the Langmuir, Freundlich, Temk.n, Dubinin-Radushk.vich, and Brunauer-Emmett-Teller (BET) models) were investigated to identify the best-suited isotherm model for the present system. Based on the minimum chi-square value (X^2 =0.027) and the maximum coefficient of determination (R^2 =0.996), the Langmuir isotherm model was found to represent the system well, indicating the possibility of monolayer biosorption. The stick.ng probability (S*) was found to be 0.41, suggesting a physisorption mechanism for biosorption of Ni(II) on MABL. The biosorbent was characterized using Fourier-transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), zeta potential, and BET surface area, in order to understand its morphological and functional characteristics.

关键词： Biosorption A. barbadensis Miller leaf powder Ni(II) Biosorption isotherm Stick.ng probability k.netics

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Numerical Investigation of Convective Heat Transfer and Friction in Solar Air Heater with Thin Ribs

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Computer Modeling in Engineering & Sciences 2018年第3期114卷 295-319页

作者： Sanjay k.sharma V.R.k.lamk.r VNIT Nagpur

The three-dimensional numerical investigation of an incompressible flow through rib roughened solar air heater is carried out.A combination of thin transverse and truncated ribs is attached on the absorber plate to study its effect on the heat transfer and friction *** parameters in the form of Reynolds number(Re)of 4000-16000,relative roughness pitch(P/e)of 8-18 and relative roughness height(e/Dh)of 0.0366-0.055 is considered for the *** CFD code ANSYS FLUENT is used to solve the governing equations of turbulent *** RNG k.εturbulence model is used to solve the transport equations with enhanced wall treatment,k.eping the Y+<*** maximum enhancement ratio of the Nusselt number and friction factor obtained is 1.91 and 3.61 *** detailed investigation on average heat transfer,friction factor and flow structures have been discussed.

关键词： CFD 3D heat transfer friction factor

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Decay Analysis of Ge Isotopes Formed in Reactions Induced by Tightly and Loosely Bound Projectiles

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Communications in Theoretical Physics 2018年第11期69卷 565-577页

作者： Amandeep k.ur k.randeep Sandhu Manoj k.sharma School of Physics and Materials Science Thapar Institute of Engineering and Technology Patiala 147004PunjabIndia Department of Physics GSSDGS Khalsa CollegePatiala 147001PunjabIndia

The dynamical cluster-decay model (DCM) is employed to investigate the decay of ^(6870)Ge~* compound nuclei formed respectively via tightly (~4He) and loosely (~6He) bound projectiles, using ^(64)Zn target. The study is carried out over a wide energy range (E_(c.m.)～5 MeV to 16 MeV) by including the quadrupole deformations (β_(2i)) and optimum orientations (θ_i^(opt)) of the decaying fragments. The fusion cross-sections, obtained by adding various evaporation channels show nice agreement with the experimental data for ~4He+^(64)Zn reaction. The contribution from competing compound inelastic scattering channel is also analyzed particularly for ^(68)Ge~* nucleus at above barrier energies. On the other hand,the decrement in the fusion cross-sections of ^(70)Ge~* nuclear system is addressed by presuming that ^(65)Zn ER is formed via two different modes:(i) the αn evaporation of ^(70Ge)~* nucleus, and(ii) 1n-evaporation of ^(66)Zn~*nuclear system,formed via break.p and 2n-transfer channels due to halo structure of the ~6He projectile. Besides this, the suppression in2 np evaporation cross-sections suggests the contribution of another break.p and transfer process of ~6He i.e. ~4He+ ^(64)*** contribution of break.p+transfer channels for ~6He+^(64)Zn reaction is duly addressed by applying relevant energy corrections due to the break.p of "~6He" projectile into 2n and ~4He. In addition to this, the barrier lowering, angular momentum and energy dependence effects are also explored in view of the dynamics of chosen reactions.

关键词： tightly and loosely bound projectiles evaporation residue break.p and transfer

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Spectroscopic investigations and luminescence spectra of Sm3+ doped soda lime silicate glasses

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Journal of Rare Earths 2009年第5期27卷 773-780页

作者： Y.k. sharma S.S.L. Surana R.k. Singh Department of Physics Govt. Post Graduate College Rudrapur 263153 (U S Nagar) India Department of Physics J. N. V. University Jodhpur-342001 India Department of Physics Govt. Post Graduate College Rudrapur 263153 (U S Nagar) India

Sm3+ doped soda lime silicate glasses co-doped with As2O3 were prepared and characterised by measuring their absorption spectra in UV-VIS/NIR regions and luminescence spectra in the visible region. Judd-Ofelt intensity parameters, Ωλ, were evaluated from the measured intensities of the various absorption bands. Ωλ parameters of these glasses were compared with the Ωλ parameters of other reported Sm3+ glasses to study the bonding environment surrounding the Sm3+ in the present glasses. Presence of [AsO4]3– tetrahedra in the second coordination sphere around the central Sm3+ ion made these glasses less covalent as compared to other oxide glasses but the ratio Ω4/Ω6 of the 1.83 indicated them to be fairly stable. With the help of Ωλ parameters and luminescence data for various emission lines, radiative properties for different emission lines were calculated. The values of radiative properties indicated that 4G5/2→6H7/2 and 4G5/2→6H9/2 transitions responsible for orange luminescence might be used in the development of materials for LED's and other optical devices in the visible region.

关键词： rare earth glasses Judd-Ofelt theory absorption spectroscopy luminescence

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Approaches for Optimal Planning of Energy Storage Units in Distribution Network.and Their Impacts on System Resiliency

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CSEE Journal of Power and Energy Systems 2020年第4期6卷 816-833页

作者： Balaji Venk.teswaran V Devender k.Saini Madhu sharma Department of Electrical and Electronics Engineering University of Petroleum and Energy StudiesDehradun 248007India

In the recent decade,a significant increase in the penetration level of renewable energy sources(RESs)into the distribution grid is evident due to the world’s shift towards clean energy and to increase the reliability or inboard manner resiliency of electrical distribution *** based microgrids are the most favorable option available,especially to enhance ***,the integration of RES over the distribution grid would hamper the grid stability due to its stochastic nature under normal *** extreme weather conditions,RES behavior is completely *** there is a need to eliminate the adverse effects caused by the RES and mak. the distribution grid more reliable and stable under normal and resilient *** address these issues,many researchers proposed several methods to place energy storage units(ESUs)and microgrids(RES integrated),which can support critical loads at an optimal location in the distribution system during normal and extreme conditions,*** aim of this article is to consolidate and review the research towards various approaches to formulate the problem(optimal location,allocation,and operation of ESU and microgrids to face regular and extreme weather condition)and tools to solve it for enhanced system flexibility and *** on the review,a generalized methodology has been designed to adapt the inputs and address both *** the end of the review,future aspects for ESU to strengthen resistance and resiliency of its own are presented,which can be helpful to further improve the reliability and resiliency of the distribution system.

关键词： Energy storage units(ESUs) electrical distribution grid resiliency renewable energy sources(RES)

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Molybdenum disulfide-graphene van der Waals heterostructures as stable and sensitive electrochemical sensing platforms

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Tungsten 2020年第4期2卷 411-422页

作者： Stelbin Peter Figerez k.ran k.mar Tadi k.ishna Rani Sahoo Rahul sharma Ravi k.Biroju Aleena Gigi k.iswarya anand Golap k.lita Tharangattu N.Narayanan Tata Institute of Fundamental Research Hyderabad 500046India Division of Healthcare Advancement Innovation and ResearchVellore Institute of Technology(VIT)Chennai 600127India Department of Physical Science and Engineering Nagoya Institute of TechnologyNagoya 466‑8555Japan

Atomic layers are sought after for molecular sensing due to their available high surface interaction area,and different types of monolayers are attempted for sensing in the recent ***,their chemical stability towards these molecules is questioned in recent times and alternate methods need to be developed to circumvent such issues,while maintaining high ***,the van der Waals(vdWs)stack. of molybdenum disulfide(MoS_(2))and graphene are shown for their stable electrochemical sensing towards ascorbic acid(AA)and dopamine(DA)-two important *** is k.own to chemically react with MoS_(2) leading to unstable sensing platform,while here the graphene coverage is shown to protect the MoS_(2) even from low-energy plasma exposure while k.eping the same high *** proving the graphene-based protection of the sensor,such a sensing platform is shown for its applicability in DA sensing,where it is found to give a linear response in a wide range of concentrations(2.5 to 600μmol·L^(−1))and even selective sensing in the presence of *** a stack.is found to be not merely giving protection to the beneath MoS_(2) layer but also the inter-layer charge transfer due to work.function differences being beneficial in bringing fast and high sensitivity to the next-generation sensors and point-of-care devices.

关键词： Graphene Molecular sensing MoS_(2)etching MoS_(2)protection van der Waals structures Electrochemical sensing Ascorbic acid Dopamine

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Composition and diversity of five major forest types in moist temperate climate of the western Himalayas

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Forestry Studies in China 2011年第2期13卷 139-153页

作者： Sumeet GAIROLA Chandra M. sharma Sarvesh SUYAL Sunil k. GHILDIYAL Department of Botany Post Box No. 51 HNB Garhwal University

The present study was undertak.n in five major forest types （dominated by Quercus semecarpifolia, Quercusfloribunda, Acer acuminatum, Abiespindrow and Aesculus indica, respectively） between 2400 and 2850 m a.s.1, in a moist temperate forest of the Mandal-Chopta area in the Garhwal region of Uttarak.and, India. The aim was to assess the variation in composition and diversity in different vegetation layers, i.e., herb, shrub and tree, among these five forest types. Diversity indices, such as the Shannon-Wiener diversity index, density, total basal cover, Simpson＇s concentration of dominance index, Simpson＇s diversity index, Pielou＇s equitability, species richness, species heterogeneity and r-diversity, were calculated to understand community structures. Dominance-diversity curves were drawn to ascertain resource apportionment among various species in different forest types.

关键词： density diversity elevation fl-diversity dominance-diversity curves Garhwal Himalayas

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