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An Efficient Sound and Data Steganography based Secure Authentication System

Computers, Materials & Continua 2021年第4期67卷 723-751页

作者： Debajit Datta Lalit Garg Kathiravan Srinivasan Atsushi Inoue G.Thippa Reddy M.praveen kumar Reddy K.Ramesh Nidal Nasser School of Computer Science and Engineering Vellore Institute of Technology(VIT)Vellore632014India Faculty of Information and Communication Technology University of MaltaMsidaMSD2080Malta School of Information Technology and Engineering Vellore Institute of Technology(VIT)Vellore632014India Department of Information Systems&business Analytics Eastern Washington UniversitySpokaneWA99202USA Department of Computer Science Karnataka State Akkamahadevi Women’s UniversityVijayapuraIndia College of Engineering Alfaisal UniversityRiyadh1153Saudi Arabia

The prodigious advancements in contemporary technologies have also brought in the situation of unprecedented ***,the pin-based security system is an inadequate mechanism for handling such a *** reason is that hackers use multiple strategies for evading security systems and thereby gaining access to private *** research proposes to deploy diverse approaches for authenticating and securing a connection amongst two devices/gadgets via sound,thereby disregarding the pins’manual ***,the results demonstrate that the proposed approaches outperform conventional pin-based authentication or QR authentication ***,a random signal is encrypted,and then it is transformed into a wave file,after which it gets transmitted in a short burst via the device’s ***,the other device/gadget captures these audio bursts through its microphone and decrypts the audio signal for getting the essential data for ***,this model requires two devices/gadgets with speakers and a microphone,and no extra hardware such as a camera,for reading the QR code is *** first module is tested with realtime data and generates high scores for the widely accepted accuracy metrics,including precision,Recall,F1 score,entropy,and mutual information(MI).Additionally,this work also proposes a module helps in a secured transmission of sensitive data by encrypting it over images and other *** steganographic module includes two-stage encryption with two different encryption algorithms to transmit data by embedding inside a *** encryption algorithms and their combinations are taken for this system to compare the resultant file *** these systems engender high accuracies and provide secure connectivity,leading to a sustainable communication ecosystem.

关键词： Cyber-attacks signals privacy security organization encryption decryption authentication effective communication steganography

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Poverty alleviation and resource conservation through development of cost effective technology at foot hill of Shivalik - A case study

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International Journal of Agricultural and biological Engineering 2013年第3期6卷 34-40页

作者： R kumar P K Singh b A Langoo Division of Agricultural Engineering Sher-e-Kashmir Univeristy of Agricultural Sciences and Techonology of KashmirSrinagar(J&K)India Department of soil and water Engineering College of Technology and EngineeringUdaipur(Raj)India

The study revealed the development of cost effective technology utilized as a practical tool for treatment of seasonal torrent and addressing erosion problems and land use *** was implemented in a small agricultural watershed located in foot hill of Shivalik,India,to assess its prediction capacity of runoff,peak runoff flow and sediment *** effective technology was evaluated at the event scale by using a database of hydrological,geomorphologic and land use data collected during a two-year *** the catchment,the gullies which are small to medium in size were treated with gully plugging by erecting loose boulder check dams and erected with different species of *** types of spur were constructed with vegetative reinforcement for channelization of stream *** sediments deposited in the first year at downstream was recorded 0.09-81.0 tons,while in the second year it was reduced up to 0.07-16.7 ***,up stream sediment deposition was recorded 1.0-72.0 tons and 0.37-13.1 tons in two consecutive *** D-50 analysis of sediment deposited was carried in three different places of torrent and it was found that deposited particle size material decreased after treatment undertaken in the torrent ***,the mechanical as well as vegetative measures helped in the channelization of water course towards the central line with the tune of 10-100 m,stabilization of torrent bed and reclamation of degraded land.

关键词： Integrated watershed management mechanical measures D-50 vegetative measures

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Effect of Hydrodynamic Conditions on Corrosion Inhibition of Cu-Ni(90/10)Alloy in Seawater and Sulphide Containing Seawater Using 1,2,3-benzotriazole

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Journal of Materials Science & Technology 2014年第1期30卷 65-76页

作者： b.V.Appa Rao K.Chaitanya kumar Department of Chemistry National Institute of Technology Warangal

Electrochemical studies of the effect of hydrodynamic conditions on corrosion inhibition of Cu-Ni （90/10） alloy in synthetic seawater and sulphide containing synthetic seawater by 1,2,3-benzotriazole （bTAH） are presented. Impedance, potentiodynamic polarization and cyclic voltammetric （CV） studies are employed in the present investigation. The studies are carried out by using Cu-Ni （90/10） alloy rotating disc electrode at different rotation speeds and at different immersion periods. Reynolds numbers at each rotation speed infer that the flow of seawater is laminar. With increasing rotation speed of the electrode immersed in seawater without sulphide and bTAH, both the charge transfer resistance （Rot） and film resistance （Rf^lm） are increased. However, in the presence of sulphide ions and without bTAH, both the Rot and Rf,m are found to decrease with increasing rotation speed at identical immersion periods. Interestingly, when bTAH is added to seawater or seawater containing sulphide, both the Rot and Rf,m are increased to such a great extent that an inhibition efficiency of 99.99% is obtained. In the presence of bTAH, the phase angle bode plots are more broadened and the maximum values of phase angle are increased to a value close to 90~ as the rotation speed is increased. The bTAH film is highly protective even under hydrodynamic condition also. Potentiodynamic polarization studies infer that bTAH functions as a mixed inhibitor under hydrodynamic conditions also. CV studies reveal that the protective bTAH film is stable even at anodic potentials of ＋850 mV vs Ag/AgCI.

关键词： Cu-Ni (90/10) alloy Rotating disc electrode Seawater Corrosion inhibition Electrochemical studies 1,2,3-benzotriazole

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Quadratic convective flow of radiated nano-Jeffrey liquid subject to multiple convective conditions and Cattaneo-Christov double diffusion

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Applied Mathematics and Mechanics(English Edition) 2018年第9期39卷 1311-1326页

作者： P.b.SAMPATH kumar b.MAHANTHESH b.J.GIREESHA S.A.SHEHZAD Department of Studies and Research in Mathematics Kuvempu University Department of Mathematics Christ University Department of Mathematics COMSATS Institute of Information Technology

A nonlinear flow of Jeffrey liquid with Cattaneo-Christov heat flux is investigated in the presence of nanoparticles. The features of thermophoretic and brownian movement are retained. The effects of nonlinear radiation, magnetohydrodynamic(MHD), and convective conditions are accounted. The conversion of governing equations into ordinary differential equations is prepared via stretching transformations. The consequent equations are solved using the Runge-Kutta-Fehlberg(RKF) method. Impacts of physical constraints on the liquid velocity, the temperature, and the nanoparticle volume fraction are analyzed through graphical illustrations. It is established that the velocity of the liquid and its associated boundary layer width increase with the mixed convection parameter and the Deborah number.

关键词： nonlinear convection Jeffrey liquid nanoliquid convective condition thermophoretic brownian motion

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The role and significance of Magnesium in modern day research-A review

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Journal of Magnesium and Alloys 2022年第1期10卷 1-65页

作者： S V Satya Prasad S b Prasad Kartikey Verma Raghvendra kumar Mishra Vikas kumar Subhash Singh Department of Production and Industrial Engineering National Institute of Technology JamshedpurJharkhand831014India Department of Chemical Engineering Indian Institute of TechnologyKanpur208016India Enhanced Composites and Structures Center School of AerospaceTransport and ManufacturingCranfield UniversityBedfordshire MK43 OALUK Department of Automotive Technology Mechanical Department DivisionFederal TVET instituteAddis AbabaEthiopia

Magnesium is one of the largely available elements in the earth’s crust. It has a low structural density with high specific strength. This unique material property has forced an increase in the use of magnesium and its alloys in various applications pertaining to industrial sector,automobiles, aerospace and biomedical. Since magnesium is a highly reactive metal, it is prone to higher rate of corrosion as compared to its counterparts. Thus, it is essential to analyze the corrosion behavior of magnesium and its alloys in its applications. An appropriate process is to be followed in the design and development of magnesium alloys which overcome the limitations of magnesium and enhance the desired material properties in accordance to their applications. This review paper summarizes the importance of magnesium and its material properties. The influence of various alloying elements on the mechanical properties of magnesium is reviewed. The broad classification of Mg alloys and their behavioral trends are detailed. The corrosion behavior of magnesium and the influence of corrosion products on the material characteristics of magnesium, in aqueous medium, are discussed. The manufacturing techniques of magnesium alloys along with the secondary techniques are also covered. The various applications and the limitations of magnesium in these applications are covered. A complete section is dedicated towards detailing the recent trends of magnesium(Mg) alloys, i.e., the biodegradable nature and applications of Mg alloys. The influence of biocorrosion on Mg alloys and techniques to overcome it have been deliberated. This paper provides a thorough review on recent developments of magnesium with respect to engineering applications.

关键词： Magnesium alloys biodegradable alloys Magnesium corrosion biocorrosion

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In-hospital outcomes in COVID-19 patients with non-alcoholic fatty liver disease by severity of obesity:Insights from national inpatient sample 2020

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World Journal of Hepatology 2024年第6期16卷 912-919页

作者： Sashwath Srikanth Vibhor Garg Lakshmi Subramanian Jyoti Verma Hansika Sharma Harroop Singh Klair Shrenil A Kavathia Jithin Kolli Teja Nikhil Sai Vasireddy kumar Anmol Dhanush Kolli Shruti Sanjay bodhankar Sobya Hashmi Shaylika Chauhan Rupak Desai Department of Medicine ECU Health Medical CenterGreenvilleNC 27834United States Department of Medicine Jacobi Medical Center/Albert Einstein College of MedicineBronxNY 10461United States Department of Medicine North Alabama Medical CentreFlorenceAL 35630United States Department of General Medicine Gandhi Medical CollegeSecunderabad 500003TelanganaIndia Department of Medicine Government Medical CollegePatiala 147001PunjabIndia Department of Medicine B.J.Medical CollegeAhmedabad 380016GujaratIndia Department of Medicine JSS Medical CollegeMysore 570015KarnatakaIndia Department of Internal Medicine Gandhi Medical CollegeSecunderabad 500003TelanganaIndia Department of Medicine Kasturba Medical CollegeManipal 575001KarnatakaIndia Clinical Extern Department of Internal MedicineBeaumont HospitalDearbornMI 48124United States Department of Internal Medicine Geisinger Health SystemWilkes-BarrePA 18702United States Independent Researcher AtlantaGA 30079United States

bACKGROUND Non-alcoholic fatty liver disease(NAFLD)increases the risk of cardiovascular diseases independently of other risk ***,data on its effect on cardiovascular outcomes in coronavirus disease 2019(COVID-19)hospitalizations with varied obesity levels is *** management and patient care depend on understanding COVID-19 admission results in NAFLD patients with varying obesity *** To study the in-hospital outcomes in COVID-19 patients with NAFLD by severity of *** COVID-19 hospitalizations with NAFLD were identified using International Classification of Disease-10 CM codes in the 2020 National Inpatient Sample *** and Obesity Classes Ⅰ,Ⅱ,and Ⅲ(body mass index 30-40)were *** adverse cardiac and cerebrovascular events(MACCE)(all-cause mortality,acute myocardial infarction,cardiac arrest,and stroke)were compared between *** regression analyses adjusted for sociodemographic,hospitalization features,and *** Our analysis comprised 13260 hospitalizations,7.3% of which were overweight,24.3% Class Ⅰ,24.1% Class Ⅱ,and 44.3% Class Ⅲ.Class Ⅲ obesity includes younger patients,blacks,females,diabetics,and hypertensive *** multivariable logistic analysis,Class Ⅲ obese patients had higher risks of MACCE,inpatient mortality,and respiratory failure than Class Ⅰ obese *** Ⅱ obesity showed increased risks of MACCE,inpatient mortality,and respiratory failure than Class I,but not *** obesity classes had non-significant risks of MACCE,inpatient mortality,and respiratory failure compared to the overweight *** Class Ⅲ obese NAFLD COVID-19 patients had a greater risk of adverse outcomes than class Ⅰ.Using the overweight group as the reference,unfavorable outcomes were not significantly *** obesity had a greater risk of MACCE regardless of the referent group(overweight or Class Ⅰ obese)compared to overweight NAFLD patients admitte

关键词： Non-alcoholic fatty liver disease Obesity Obese body mass index Major adverse cardiac and cerebrovascular events Mortality Acute myocardial infarction Cardiac arrest Stroke

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Spin squeezing in Dicke-class of states with non-orthogonal spinors

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Chinese Physics b 2019年第6期28卷 66-71页

作者： K S Akhilesh K S Mallesh Sudha praveen G Hegde Department of Physics University of MysoreManasagangotriMysuru-570006KarnatakaIndia Department of Physics Kuvempu UniversityShankaraghattaShimoga-577451India Inspire Institute Inc. AlexandriaVirginia 22303USA

The celebrated Majorana representation is exploited to investigate spin squeezing in different classes of pure symmetric states of N qubits with two distinct spinors, namely the Dicke-class of states. On obtaining a general expression for spin squeezing parameter, the variation of squeezing for different configurations is studied in detail. It is shown that the states in the Dicke-class, characterized by two-distinct non-orthogonal spinors, exhibit squeezing.

关键词： Majorana representation of pure symmetric multiqubit states spin squeezing Dicke states

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Frequency of Uveitis among Juvenile Idiopathic Arthritis Patients in a Tertiary Care Hospital of bangladesh: A Retrospective Study

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Open Journal of Rheumatology and Autoimmune Diseases 2024年第3期14卷 144-156页

作者： Md. Asif Ali Mujammel Haque Kamrul Laila Mohammad Hafiz Al-Mamun Mohammed Mahbubul Islam Mohammad Imnul Islam Manik kumar Talukder Pediatric Rheumatology Division Department of Pediatrics Bangabandhu Sheikh Mujib Medical University Dhaka Bangladesh

background: Juvenile idiopathic arthritis (JIA) is the most frequently encountered pediatric rheumatologic disorder with an unknown etiology. At present there is no published data regarding the frequency of uveitis in patients with JIA in bangladesh. This study aimed to observe the frequency of JIA-associated uveitis (JIAU) and distribution of uveitis among different sub-categories of JIA at the Pediatric Rheumatology division, both outdoor and indoor patients, Department of Pediatrics, bangabandhu Sheikh Mujib Medical University (bSMMU) in bangladesh. Methods: This was a retrospective study of 1784 JIA patients at the Pediatric Rheumatology division, bSMMU from July 2010 to March 2023. Results: Among the 1784 enrolled JIA patients, we observed that 0.73% of cases had uveitis. Here, 61.5% of JIAU cases were male. Most of the cases (92.3%) had bilateral uveitis and only 7.7% cases had unilateral uveitis. Among JIAU patients, the majority were Oligo JIA (53.8%), followed by ERA 30.8%, Poly JIA RF(−) 7.7% and Systemic JIA 7.7% cases respectively. This study also revealed that 15.4% of JIAU patients had ANA positivity and 23% had HLA b-27 positivity. Here we also found ocular complications associated with uveitis such as band keratopathy (23.1%), posterior synechiae (15.4%) and cataract (15.4%). Conclusions: In this study, we observed only 0.73% of patients of JIA had developed uveitis which is lower than the frequency observed in other European studies. This study also showed various ocular complications amongst JIA-associated uveitis patients which signifies the importance of adherence to periodic ophthalmological follow-up to prevent these ocular complications.

关键词： JIA Uveitis HLA-b27 ANA bSMMU

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Ground State Meson Spectrum in a Relativistic Model with Instanton Induced Interaction

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Communications in Theoretical Physics 2010年第2期53卷 325-330页

作者： Antony Prakash Monteiro K.b.Vijaya kumar Department of Physics Mangalore University

The mass spectrum of the S-wave mesons is considered in the frame work of relativistic harmonic model （RHM）. The full Hamiltonian used in the investigation has the Lorentz scalar plus a vector harmonic-oscillator potential, the confined-one-gluon-exchange potential （COGEP） and the instanton-induced quark-antiquak interaction （Ⅲ）. A good description of the mass spectrum is obtained. The respective role of Ⅲ and COGEP in the S-wave meson spectrum is discussed.

关键词： quark model confined-one-gluon-exchange potential instanton induced interaction S-wave spectra

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I-Quiz:An Intelligent Assessment Tool for Non-Verbal behaviour Detection

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Computer Systems Science & Engineering 2022年第3期40卷 1007-1021页

作者： b.T.Shobana G.A.Sathish kumar Department of Information Technology Sri Venkateswara College of EngineeringSriperumbudur602117India Department of Electronics and Communication Engineering Sri Venkateswara College of EngineeringSriperumbudur602117India

Electronic learning(e-learning)has become one of the widely used modes of pedagogy in higher education today due to the convenience and flexibility offered in comparison to traditional learning *** in Information and Communication Technology have eased learner connectivity online and enabled access to an extensive range of learning materials on the World Wide *** covid-19 pandemic,online learning has become the most essential and inevitable medium of learning in primary,secondary and higher *** recent times,Massive Open Online Courses(MOOCs)have transformed the current education strategy by offering a technology-rich and flexible form of online learning.A key component to assess the learner’s progress and effectiveness of online teaching is the Multiple Choice Question(MCQ)assessment in most of the MOOC *** exists on the reliability and validity of the assessment component as it raises a qualm whether the real knowledge acquisition level reflects upon the assessment *** is due to the possibility of random and smart guesses,learners can attempt,as MCQ assessments are more vulnerable than essay type *** paper presents the architecture,development,evaluation of the I-Quiz system,an intelligent assessment tool,which captures and analyses both the implicit and explicit non-verbal behaviour of learner and provides insights about the learner’s real knowledge acquisition *** I-Quiz system uses an innovative way to analyse the learner non-verbal behaviour and trains the agent using machine learning *** intelligent agent in the system evaluates and predicts the real knowledge acquisition level of learners.A total of 500 undergraduate engineering students were asked to attend an on-Screen MCQ assessment test using the I-Quiz system comprising 20 multiple choice questions related to advanced C *** non-verbal behaviour of the learner is recorded using a front-facing camera during t

关键词： E-Learning adaptive and intelligent e-learning systems intelligent tutoring systems emotion recognition non-verbal behaviour knowledge acquisition level

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