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The energetic relationship among geoeffective solar flares, associated CMEs and SEPs

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Research in Astronomy and Astrophysics 2013年第8期13卷 978-990页

作者： Nipa J Bhatt Rajmal Jain arun kumar Awasthi Physics Dept C. U. Shah Science College Physical Research Laboratory (Dept. of Space Govt. of India)

Major solar eruptions （flares, coronal mass ejections （CMEs） and solar energetic particles （SEPs）） strongly influence geospace and space weather. Currently, the mechanism of their influence on space weather is not well understood and requires a detailed study of the energetic relationship among these eruptive phenomena. From this perspective, we investigate 30 flares （observed by RHESSI）, followed by weak to strong geomagnetic storms. Spectral analysis of these flares suggests a new power-law relationship （r - 0.79） between the hard X-ray （HXR） spectral index （before flarepeak） and linear speed of the associated CME observed by LASCO/SOHO. For 12 flares which were followed by SEP enhancement near Earth, HXR and SEP spectral analysis reveals a new scaling law （r - 0.9） between the hardest X-ray flare spectrum and the hardest SEP spectrum. Furthermore, a strong correlation is obtained between the linear speed of the CME and the hardest spectrum of the corresponding SEP event （r - 0.96）. We propose that the potentially geoeffective flare and associated CME and SEP are well-connected through a possible feedback mechanism, and should be regarded within the framework of a solar eruption. Owing to their space weather effects, these new results will help improve our current understanding of the Sun-Earth relationship, which is a major goal of research programs in heliophysics.

关键词： Sun coronal mass ejections (CMEs) - Sun flares - Sun particle emission - Sun solar-terrestrial relations - Sun X-rays

Identification of strategy parameters for particle swarm optimizer through Taguchi method

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2006年第12期7卷 1989-1994页

作者： KHOSLA arun kumar Shakti AGGARWAL K.K. Department of Electronics and Communication Engineering National Institute of Technology Jalandhar 144011 India Centre for Advanced Technology Haryana Engineering College Jagadhari 135003 India Vice Chancellor GGS Indraprastha University Delhi 110006 India

Particle swarm optimization （PSO）, like other evolutionary algorithms is a population-based stochastic algorithm inspired from the metaphor of social interaction in birds, insects, wasps, etc. It has been used for finding promising solutions in complex search space through the interaction of particles in a swarm. It is a well recognized fact that the performance of evolutionary algorithms to a great extent depends on the choice of appropriate strategy/operating parameters like population size, crossover rate, mutation rate, crossover operator, etc. Generally, these parameters are selected through hit and trial process, which is very unsystematic and requires rigorous experimentation. This paper proposes a systematic based on Taguchi method reasoning scheme for rapidly identifying the strategy parameters for the PSO algorithm. The Taguchi method is a robust design approach using fractional factorial design to study a large number of parameters with small number of experiments. Computer simulations have been performed on two benchmark functionsiRosenbrock function and Griewank functionito validate the approach.

关键词： Strategy parameters Particle swarm optimization (PSO) Taguchi method ANOVA

PAPR Reduction of NOMA Using Vandermonde Matrix-Particle Transmission Sequence

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Computer Systems Science & Engineering 2022年第10期43卷 193-201页

作者： arun kumar Sandeep Gupta Himanshu Sharma Mehedi Masud Department of Electronics and Communication Engineering JECRC UniversityJaipur303905India Department of Electrical Engineering JECRC UniversityJaipur303905India Department of Computer Science and Engineering JECRC UniversityJaipur303905India Department of Computer Science College of Computers and Information TechnologyTaif University11099Saudi Arabia

Non-Orthogonal Multiple Access(NOMA)is an ideal choice for 5G waveforms due to their characteristics such as high data rate,massive device connectivity,high spectral access,and effective frequency selective ***,it permits gigantic *** spectrum overlaps with NOMA,which consents several operators to segment the spectrum at the same *** features make NOMA more suitable for use beyond *** to Average Power(PAPR)is a major problem in Multi-Carrier Techniques(MCT)like NOMA and it also degrades the performance of the *** Partial Transmission Sequence(PTS)is a superior algorithm for moderating the ***,it also increases the complexity of the *** PAPR is reduced in NOMA by multiplying the NOMA signal with optimised phase vectors(P).The phase vectors are generated by using the Vandermonde Matrix(VM).In this work,we proposed a VM-PTS algorithm for the NOMA system,and the number of computations to search the optimal phase vectors for NOMA high PAPR signal is less as compared with existing *** outcomes demonstrate that the performance of the recommended PTS in terms of PAPR,Bit Error Rate(BER),and complexity is better than the conventional PTS(C-PTS).

关键词： VM-PTS NOMA PAPR 5G

Pharmacological potential of Manilkara zapota(L.)***(Sapodilla):a narrative review

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Journal of Traditional Chinese Medicine 2024年第2期44卷 403-407页

作者： Priyanka Sharma Aakash Deep Harish kumar Nitin Bansal Sanjiv kumar arun Davinder kumar Department of Pharmaceutical Sciences Chaudhary Bansi Lal UniversityBhiwani 127021India Department of Pharmaceutical Sciences Maharishi Dayanand UniversityRohtak 124001India

Herbal medicine is safe and effective in treating various *** herbal medicine plays a tremendous role in treatment of various diseases and accompanying complications,hence herbal medicine requires remarkable attention in further research for the development of numerous active formulations for treatment of health *** plant needs special consideration for development and research of unidentified compound and characterization of novel active molecules that overcome multiple pathological *** genus Manilkara contains 135 plants around the *** overview discusses all the virtues of most important and commonly used plant Manilkara zapota(L.)***(***),also known as *** has various traditional beneficial effects in treatment of various diseases and disorders dating back to prehistoric times and used in ancient traditional system of herbal medicine.

关键词： herbal medicine Manilkara zapota phytoconstituents pharmacological activity review

Prospects to the formation and control of potential dimer impurity E of pantoprazole sodium sesquihydrate

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Journal of Pharmaceutical Analysis 2019年第3期9卷 170-177页

作者： arun kumar Awasthi Lalit kumar Punit Tripathi Madhava Golla Cirandur Suresh Reddy Pramod kumar Micro Labs Ltd. Chemical Research Department API R&D Centre Plot No. 43-45 KIADB IVth Phase Bommasandra-Jigani Link Road Anekal Taluk Bangalore 560105 Karnataka India Department of Chemistry Sri Venkateswara University Tirupati 517502 Andhra Pradesh India

Pantoprazole sodium, a substituted benzimidazole derivative, is an irreversible proton pump inhibitor which is primarily used for the treatment of duodenal ulcers, gastric ulcers, and gastroesophageal reflux disease (GERD). The monographs of European Pharmacopoeia (Ph. Eur.) and United States Pharmacopoeia (USP) specify six impurities, viz.;impurities A, B, C, D, E and F, respectively for its active pharmaceutical ingredient (API). The identification and synthesis of all impurities except impurity E are well described in the literature;however, there is no report related to impurity E. The prospects to the formation and controlling of impurity E up to -0.03% in the synthesis of pantoprazole sodium sesquihydrate (PAN) were discussed in detail for the first time. The present work described the journey towards the successful development of an optimal preparation procedure of dimer impurity E. The most plausible mechanism involved in the formation of impurity E has been proposed.

关键词： Pantoprazole sodium sesquihydrate Impurity E Oxidation Enrichment Column chromatography Characterization HPLC

A Real-Time and Ubiquitous Network Attack Detection Based on Deep Belief Network and Support Vector Machine

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IEEE/CAA Journal of Automatica Sinica 2020年第3期7卷 790-799页

作者： Hao Zhang Yongdan Li Zhihan Lv arun kumar Sangaiah Tao Huang IEEE National Engineering Laboratory for Educational Big Data Central China Normal UniversityWuhan 430072China Lanzhou Central Sub-branch of The People’s Bank of China Lanzhou 730000China School of Data Science and Software Engineering Qingdao UniversityQingdao 266071China School of Computing Science and Engineering Vellore Institute of Technology UniversityTamil Nadu 632014India

In recent years, network traffic data have become larger and more complex, leading to higher possibilities of network intrusion. Traditional intrusion detection methods face difficulty in processing high-speed network data and cannot detect currently unknown attacks. Therefore, this paper proposes a network attack detection method combining a flow calculation and deep learning. The method consists of two parts: a real-time detection algorithm based on flow calculations and frequent patterns and a classification algorithm based on the deep belief network and support vector machine(DBN-SVM). Sliding window(SW) stream data processing enables real-time detection, and the DBN-SVM algorithm can improve classification accuracy. Finally, to verify the proposed method, a system is *** on the CICIDS2017 open source data set, a series of comparative experiments are conducted. The method's real-time detection efficiency is higher than that of traditional machine learning algorithms. The attack classification accuracy is 0.7 percentage points higher than that of a DBN, which is 2 percentage points higher than that of the integrated algorithm boosting and bagging methods. Hence, it is suitable for the real-time detection of high-speed network intrusions.

关键词： Deep belief network(DBN) flow calculation frequent pattern intrusion detection sliding window support vector machine(SVM)

Is routine use of transanastomotic tube justified in the repair of esophageal atresia?

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World Journal of Pediatrics 2017年第6期13卷 584-587页

作者： Sarath kumar Narayanan arun Preeth Vazhiyodan Prathap Somnath arun Mohanan Department of Pediatric Surgery Institute of Maternal and Child HealthGovernment Medical CollegeKozhikodeKeralaIndia

Background:Transanastomotic feeding tube (TAFT) is commonly used for post-operative enteral nutrition after esophageal atresia (EA)/tracheoesophageal fistula (TEF) *** purpose of this study is to analyze the therapeutic implications of avoiding a TAFT and its impact on the outcomes ***:The medical data of 33 inpatients with EA/TEF type C repair from 2009 to 2014 were retrospectively *** were divided into two groups for comparison based on the usage of TAFT during the repair:TAFT-(without) and TAFT+ (with) groups,without *** groups were compared statistically for post-operative complications and ***:Eighteen neonates were males and 15 females,with an average birth weight of 2.43±0.43 kg and a mean gestational age of 36.15 *** (57.5%) in the TAFT-group and 14 (42A%) were in the TAFF+ *** post-operative complications,need for dilatations,duration of total parenteral nutrition (TPN) and length of hospital stay were similar in both *** incidence of pneumonitis was significantly higher in the TAFT+ ***:By avoiding a TAFT,there is no increase in complication rates nor does it entail a prolonged period of ***,not using a TAFT may have the advantage of reducing incidence of aspiration and consequent pneumonifis.

关键词： esophageal atresia tracheo-esophageal fistula transanastomotic tube

PAPR Reduction Using Advanced Partial Transmission Scheme for 5G Waveforms

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Computer Systems Science & Engineering 2022年第8期42卷 483-492页

作者： arun kumar Sumit Chakravarty SSuganya Mehedi Masud Sultan Aljahdali Department of Electronics and Communication Engineering JECRC UniversityJaipur303905INDIA Department of Electrical and Computer Engineering Kennesaw State UniversityGAUSA Electronics and Communication Engineering CMR Institute of TechnologyBangaloreINDIA Department of Computer Science College of Computers and Information TechnologyTaif University11099Saudi Arabia

The implementation of Peak Average to Power Ratio(PAPR)reduction technologies will play an important role in the regularization of Fifth Generation(5G)radio *** reduction in the advanced waveform will be the key part of designing a 5G network for different *** work introduces the simulation of an Advanced Partial Transmission Sequence(A-PTS)reduction techniques for Orthogonal Frequency Division Multiplexing(OFDM)and Filter Bank Multi-Carrier(FBMC)transmission *** the projected A-PTS,the FBMC signals are mapped into the number of sub-blocks and Inverse Fast Fourier transform(IFFT)is performed to estimate the high peak power in the time *** FBMC sub-blocks are multiplied with the phase elements to achieve an optimal PAPR value.A MATLAB 2014v simulation is used to estimate the PAPR,Bit Error Rate(BER),Error Vector Magnitude(EVM),and Modulation Error Rate(MER)performance of the proposed reduction *** simulated result reveals that the performance of the projected algorithm is better than the conventional algorithms.

关键词： PAPR PTS OFDM FBMC 5G

Endothelial dysfunction in the kidney transplant population:Current evidence and management strategies

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World Journal of Transplantation 2025年第1期15卷 24-43页

作者： arun Prabhahar Akshey Batta Juniali Hatwal Vivek kumar Raja Ramachandran Akash Batta Department of Telemedicine(Internal Medicine and Nephrology) Post Graduate Institute of Medical Education and ResearchChandigarh 160012India Department of Urology and Renal Transplant Neelam HospitalRajpura 140401PunjabIndia Department of Internal Medicine Post Graduate Institute of Medical Education and ResearchChandigarh 160012India Department of Nephrology Post Graduate Institute of Medical Education and ResearchChandigarh 160012India Department of Cardiology Dayanand Medical College and HospitalLudhiana 141001PunjabIndia

The endothelium modulates vascular homeostasis owing to a variety of vasoconstrictors and *** dysfunction(ED),characterized by impaired vasodilation,inflammation,and thrombosis,triggers future cardiovascular(CV)*** kidney disease,a state of chronic inflammation caused by oxidative stress,metabolic abnormalities,infection,and uremic toxins damages the *** is also associated with a decline in estimated glomerular filtration *** kidney transplantation,endothelial functions undergo immediate but partial restoration,promising graft longevity and enhanced CV ***,the anticipated CV outcomes do not happen due to various transplant-related and unrelated risk factors for ED,culminating in poor CV health and graft *** in kidney transplant recipients is an underrecognized and poorly studied *** diseases are the leading cause of death among kidney transplant candidates with functioning *** contributes to the pathogenesis of many of the CV *** biomarkers and vasoreactivity tests are available to study endothelial *** an increasing number of transplants happening every year,and improved graft rejection rates due to the availability of effective immunosuppressants,the focus has now shifted to endothelial protection for the prevention,early recognition,and treatment of CV diseases.

关键词： Endothelial dysfunction Endothelium Cardiovascular disease Kidney transplantation Chronic kidney disease Nitric oxide Flow-mediated dilatation Nitro-glycerine-mediated dilatation Biomarkers