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A Two-Tier Fuzzy Meta-Heuristic Hybrid Optimization for Dynamic Android Malware Detection

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Journal of Cyber Security 2022年第3期4卷 185-202页

作者： k.Santosh Jhansi Sujata chakravarty P.Ravi kiran Varma Centurion University of Technology and Management ParalakhemundiOdishaIndia Maharaj Vijayaram Gajapathi Raj College of Engineering ViizianagaramIndia Centurion University of Technology and Management BhubaneswarOdishaIndia

Application Programming Interface(API)call feature analysis is the prominent method for dynamic android malware *** benchmark androidmalware API dataset includes featureswith high *** all features of the data are relevant,filtering unwanted features improves *** paper proposes fuzzy and meta-heuristic optimization hybrid to eliminate insignificant features and improve the *** the first phase fuzzy benchmarking is used to select the top best features,and in the second phase meta-heuristic optimization algorithms viz.,Moth Flame Optimization(MFO),Multi-Verse Optimization(MVO)&Whale Optimization(WO)are run with Machine Learning(ML)wrappers to select the best from the *** ML methods viz.,Decision Tree(DT),Random Forest(RF),k-NearestNeighbors(kNN),Naie Bayes(NB)&NearestCentroid(NC)are compared as *** experiments are conducted and among them,the best post reduction accuracy of 98.34% is recorded with 95% elimination of *** proposed novelmethod outperformed among the existing works on the same dataset.

关键词： Wrapper feature selection multi-verse optimization moth flame optimization whale optimization malware detection classification

Effect of gamification applications on success of dentistry students

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World Journal of Methodology 2025年第1期15卷 80-87页

作者： Hatice Ahsen Deniz Elif Polat Balkan Burak İncebeyaz kıvanç kamburoğlu Department of Dentomaxillofacial Radiology Ankara University Faculty of DentistryAnkara 06500Türkiye

BACkGROUND Gamification,the use of game materials in education,has been used in several scientific fields,and studies have demonstrated its effectiveness in student *** To evaluate whether the success of 4th-and 5th-grade dentistry students increases when using the gamification applications kahoot!and *** An experimental design was used to measure the effect of gamification applications on students who were taught using the traditional *** this purpose,Mentimeter and kahoot!applications were used in this experimental *** groups of 4th-and 5th-grade students were formed:Mentimeter,kahoot!,and control *** effect of gamification applications on achievement was evaluated by administering a post-test to these groups after the instructional ***-way analysis of variance and t-tests were used for statistical *** A total of 35.5%of the students were in the Mentimeter group,29.8%in the kahoot!group,and 34.6%in the control *** the total number of students,54.8%were female and 45.2%were male,while 52.2%were 5th-grade students and 47.8%were 4th-grade *** overall grade point average was found to be 66.65(range,24-100).There was a statistically significant difference in average success scores between students of different groups(P=0.003kahoot!group(62.15).In the control group,this score was *** average success score was higher for students in the 5thgrade(68.16)and for female students(68.84).CONCLUSION Gamification has a great potential in the education of dentomaxillofacial radiology *** outperformed both the kahoot!and the traditional method in terms of average student success rates.

关键词： Gamification Mentimeter kahoot! Education Dentistry

Role of RNA secondary structure in emergence of compartment specific hepatitis B virus immune escape variants

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World Journal of Virology 2016年第4期5卷 161-169页

作者： Sibnarayan Datta Runu chakravarty Molecular Virology Laboratory Defence Research Laboratory (DRDO) Hepatitis Research Laboratory ICMR Virus Unit (ICMR)

AIM To investigate the role of subgenotype specific RNA secondary structure in the compartment specific selection of hepatitis B virus(HBV)immune escape *** This study was based on the analysis of the specific observation of HBV subgenotype A1 in the serum/plasma,while subgenotype A2 with G145R mutation in the peripheral blood leukocytes(PBLs).Genetic variability found among the two subgenotypes was used for prediction and comparison of the full length pregenomic RNA(pgRNA)secondary structure and base *** secondary structures were predicted for 37℃using the Vienna RNA fold server,using default *** and detailed analysis was done using RNA shapes *** In this analysis,using similar algorithm and conditions,entirely different pgRNA secondary structures for subgenotype A1 and subgenotype A2 were predicted,suggesting different base pairing patterns within the two subgenotypes of genotype A,specifically,in the HBV genetic region encoding the major hydrophilic *** observed that for subgenotype A1 specific pgRNA,nucleotide 358U base paired with 1738A and nucleotide 587G base paired with *** in sharp contrast,in subgenotype A2 specific pgRNA,nucleotide 358U was opposite to nucleotide 588G,while 587G was opposite to 359U,hence precluding correct base pairing and thereby lesser stability of the stem *** the nucleotides at 358U and 587G were replaced with 358C and 587A respectively(as observed specifically in the PBL associated A2 sequences),these nucleotides base paired correctly with 588G and 359U,*** The results of this study show that compartment specific mutations are associated with HBV subgenotype specific alterations in base pairing of the pgRNA,leading to compartment specific selection and preponderance of specific HBV subgenotype with unique mutational pattern.

关键词： Hepatitis B Compartmentalization Peripheral blood leukocytes pgRNA RNA secondary structure G145R

Insights into human immunodeficiency virus-hepatitis B virus co-infection in India

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World Journal of Virology 2015年第3期4卷 255-264页

作者： Runu chakravarty Ananya Pal ICMR Virus Unit KolkataID and BG Hospital CampusGB 4

Shared routes of transmission lead to frequent human immunodeficiency virus(HIV)-hepatitis B virus(HBV) coinfection in a host which results in about 10% of HIV positive individuals to have chronic hepatitis B infection worldwide. In post-antiretroviral therapy era, liverdiseases have emerged as the leading cause of morbidity and mortality in HIV-infected individuals and HBV coinfection have become the major health issue among this population particularly from the regions with endemic HBV infection. In setting of HIV-HBV co-infection, HIV significantly impacts the natural history of HBV infection, its disease profile and the treatment outcome in negative manner. Moreover, the epidemiological pattern of HBV infection and the diversity in HBV genome(genotypic and phenotypic) are also varied in HIV co-infected subjects as compared to HBV mono-infected individuals. Several reports on the abovementioned issues are available from developed parts of the world as well as from sub-Saharan African countries. In contrast, most of these research areas remained unexplored in India despite having considerable burden of HIV and HBV infections. This review discusses present knowledge from the studies on HIV-HBV co-infection in India and relevant reports from different parts of the world. Issues needed for the future research relevant to HIV-HBV co-infection in India are also highlighted here, including a call for further investigations on this field of study.

关键词： Human immunodeficiency virus-hepatitis B virus co-infection India Genetic diversity Liver diseases

Rapid regeneration of stable transformants in cultures of potato by improving factors influencing Agrobacterium-mediated transformation

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Advances in Bioscience and Biotechnology 2010年第5期1卷 409-416页

作者： Bipasha chakravarty Gefu Wang-Pruski Department of Plant and Animal Sciences Nova Scotia Agricultural College

An efficient and rapid Agrobacterium tumefaciens-mediated transformation protocol was developed to generate activation-tagged mutant lines with the aim of large-scale functional analysis of the potato genome. The explants were inoculated with an Agrobacterium strain harboring the binary plasmid pSkI074 containing four CaMV 35S enhancers in the T-DNA region which activates the downstream genes in the host plant after its integration. Various parameters investigated to increase transformation efficiency were the type and age of explant, cultivar, hormone combinations, preculture of explants, period of co-cultivation with bacteria and concentration of bacterial cultures used for transformation. Stem explants from 5 week old plantlets of cv. Bintje which had undergone phytohormone pretreatment for 4 days, inoculation with diluted bacterial concentration of OD600 = 0.2 containing acetosyringone followed by 2 days of co-cultivation and selection in media with IAA and trans-zeatin all helped in greatly improving the transformation efficiency. The total time required from infection to rooted shoots was 6-7 weeks. Initial evidence for stable integration and expression of the transgenes by PCR analysis showed that over 93% of the regenerated lines were transgenic and this was confirmed by Southern hybridization.

关键词： Bacterial Concentration Cultivar Explant Potato Transformation Preculture

Tumor Necrosis Factor-Induced Reactivation Tuberculous Infection

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Tumor Necrosis Factor-Induced Reactivation Tuberculous Infec...

Prognosis and feasibility of en-bloc vascular resection in stage Ⅱ pancreatic adenocarcinoma

中华医学会结核病学分会2004年学术会议

作者： chakravarty S Departments of Medicine and Microbiology & Immunology Albert Einstein College of Medicine1300 Morris Park AvenueBronxNew YorkUSA.

Reactivation of latent tuberculous infection plays a significant role in the pathogenesis of diseases caused by Mycobacterium tuberculosis. Since it is estimated that one-third of the world’s population is infected w...

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World Journal of Gastroenterology 2010年第8期16卷 997-1002页

作者： k Dilip chakravarty Jun-Te Hsu Chun-Nan Yeh Ta-Sen Yeh Tsann-Long Hwang Miin-Fu Chen Department of General Surgery Chang Gung Memorial Hospital

AIM:To establish the prognosis and feasibility of en-bloc vascular resection of stage pancreatic adenocarcinoma of the head and uncinate ***:We retrospectively analyzed 87 patients with stage pancreatic adenocarcinoma,who were subjected to pancreaticoduodenectomy (PD) and pylo-rus-preserving PD (PPPD) between 1996 and 2006 in Chang Gung Memorial Hospital,Taiwan. Twelve and 75 patients underwent PD/PPPD with and without resection of portal vein/superior mesenteric vein (PV/SMV),***:The overall 1-and 3-year survival rates of patients undergoing PD/PPPD with and without vas-cular resection were 50.0% and 16.7%,and 44.4% and 12.2%,respectively. Morbidity and mortality rates in the PV/SMV resection vs non-resection group were 50.0% and 0.0%,and 40.0% and 2.7%,respectively. In multivariate analysis,serum bilirubin,histological differentiation and adjuvant chemotherapy were independent prognostic factors that influenced ***:In stage adenocarcinoma of the pancreatic head and uncinate process,serum bilirubin,histological differentiation and adjuvant chemotherapy were independent prognostic factors,and en-bloc vascular resection is a feasible option in carefully selected patients.

关键词： Pancreatic neoplasms Adenocarcinoma Portal vein Superior mesenteric vein Pancreaticoduo-denectomy Chemotherapy

Power Domain Multiplexing Waveform for 5G Wireless Networks

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Computers, Materials & Continua 2022年第1期70卷 2083-2095页

作者： korhan Cengiz Imran Baig Sumit chakravarty Arun kumar Mahmoud A.Albreem Mohammed H.Alsharif Peerapong Uthansakul Jamel Nebhen Ayman A.Aly Department of Electrical-Electronics Engineering Trakya University22030EdirneTurkey Department of Electrical and Computer Engineering College of EngineeringDhofar UniversitySalalah 211Sultanate of Oman Department of Electrical and Computer Engineering Kennesaw State UniversityGAUSA Department of ECE JECRC UniversityJaipur303905India Department of Electronics and Communication Engineering A’Sharqiyah UniversityIbra400Oman Department of Electrical Engineering College of Electronics and Information EngineeringSejong UniversitySeoul05006Korea School of Telecommunication Engineering Suranaree University of TechnologyNakhonRatchasimaThailand Prince Sattam bin Abdulaziz University College of Computer Engineering and SciencesAlkharj11942Saudi Arabia Department of Mechanical Engineering College of EngineeringTaif UniversityTaif21944Saudi Arabia

Power domain non-orthogonal multiple access combined with a universal filtered multi-carrier(NOMA-UFMC)has the potential to cope with fifth generation(5G)unprecedented *** employs powerdomainmultiplexing to support several users,whereasUFMC is robust to timing and frequency ***,NOMA-UFMC waveform has a high peak-to-average power(PAPR)issue that creates a negative affect due to multicarrier modulations,rendering it is inefficient for the impending 5G mobile and wireless ***,this article seeks to presents a discrete Hartley transform(DHT)pre-coding-based NOMA enabled universal filter multicarrier(UFMC)(DHT-NOMA-UFMC)waveform design for lowering the high ***,DHT precoding also takes frequency advantage variations in the multipath wireless channel to get significant bit error rate(BER)*** the recommended arrangement,the throughput of the systemis improved by multiplexing the users in the power domain and permitting the users with good and bad channel conditions to concurrently access the apportioned *** simulation outcomes divulge that the projected algorithm accomplished a gain of 5.8 dB as related to the conventional ***,it is established that the proposed DHT-NOMA-UFMC outperforms the existing NOMA-UFMC *** key benefit of the proposed method over the other waveforms proposed for 5G is content gain due to the power domain multiplexing at the transmitting ***,a huge count of mobile devices could be supported under specific ***-UFMC can be regarded as the most effective applications for 5G Mobile andWireless ***,the main drawback of the proposed method is that the Fourier peak and phase signal is not easily estimated.

关键词： NOMA-UFMC 5G PAPR BER DHT-NOMA-UFMC

A Novel Approach to Study Regional Ionospheric Variations Using a Real-Time TEC Model

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Positioning 2014年第1期5卷 1-11页

作者： S. C. chakravarty Indian Space Research Organisation (ISRO) Headquarters (Ex-Scientist) Antariksh Bhavan Bangalore India.

Since IGY (International Geophysical Year), through coordinated global observations, ionospheric research has been carried out by many countries. This effort primarily helped in the design and operation of HF radio wave communication systems. The Indian region covers a highly variable part of the equatorial electrojet and EIA (Equatorial Ionisation Anomaly) phenomena making its predictability difficult. With the advent of satellite communication and navigation, the need for accurate ionospheric TEC (Total Electron Content) models at global and regional scales has been stressed. The GAGAN (GPS Aided Geo Augmented Navigation) project jointly undertaken by the Indian Space Research Organisation (ISRO) and the Airport Authority of India (AAI) aims at effectively utilising the Global Navigational Satellite System (GNSS) to determine position coordinates accurately for aircraft precision landing applications. For this purpose the range errors are estimated by using a ground network of TEC stations spread over Indian region. The near simultaneous data collected from these dual frequency GPS stations can be used to generate the geo-referenced TEC values for various applications. The author has developed necessary algorithm and associated computer programmes for a real-time vertical TEC (VTEC) model based on TEC data collected from the GAGAN ground based network stations. The model has been tested and sample results presented here show that it adequately provides for the latitudinal resolution of 1° for the entire longitude span and also for two longitude blocks (73 - 83 & 83 - 93°E) separately. Cubic spline and bilinear interpolation techniques are used for filling up temporal and spatial data gaps. The model provides tabulated output of hourly average VTEC data with latitude for ready use, as well as graphical displays of VTEC maps and contours for monitoring purpose. The real-time model and its extensions are also being used for detailed scientific studies;examples of the

关键词： GPS Real Time VTEC Model GAGAN Low Latitude TEC