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A New High Performance Realization of Hyperchaotic Modified Canonical Chua Circuit Using JFETs

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Chinese Physics Letters 2008年第8期25卷 2803-2805页

作者： Prem Bhushan Mital Umesh Kumar R.S. prasad IEC college of Engineering and Technology GB Nagar Pin-201 306 India Indian Institute of Technology Delhi Pin-110016 India Inderprastha Eng. college Sahibabad Ghaziabad (UP) India

A new implementation of hyperchaotic modified canonical Chua circuit using junction field-effect transistors （JFETs） is proposed. The design is based on a source coupled JFET circuit to approximate a smooth cubic nonlinearity and a two-terminal negative resistance element containing a p-n-p silicon transistor and an n-channel JFET. The realization is supported by Orcad Pspice simulation and numerical MATLAB results. The hyperchaotic nature is confirmed by two positive Lyapunov exponents associated with the attractor which is a fractal with a Lyapunov dimension between 3 and 4.

关键词： OSCILLATOR

Thinned array antenna synthesis using modified binary particle swarm optimization with minimization of sidelobes

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International Journal of Intelligent Computing and Cybernetics 2023年第1期16卷 158-170页

作者： Gayatri Allu M.Surendra Kumar A.M.prasad EECE GITAMVisakhapatnamIndia Department of ECE KLR College of Engineering and TechnologyKhammamIndia Department of ECE University College of Engineering JNTUKKakinadaIndia

Purpose-The purpose of this paper is to propose radiating system by avoiding electromagnetic interference in unwanted directions and to radiate the energy in the required direction with an optimization ***/methodology/approach-Practically,multiple,incompatible variables require concurrent boost on a synthesis of systematic antenna *** authors have worked out the main statistic penalty function to ensure all the ***,MBPSO(Modified Binary Particle Swarm Optimization)is developed and introduced thin planar synthesis *** sigmoid function is used to update the particle *** analytical demonstrations have been carried out,and the exhibited methods are predominant than the ***-A 20310 planar antenna array is synthesized using modified *** authors have suppressed the PSLL in two principal planes and as well as in the entire f *** results state that MBPSO outperforms the other binary BPSO,BCSO,ACO,RGA,GAoptimization *** achieved a51.84 dB PSLL level,whereas BPSO achieved48.57 dB with the same 50%***/value-Planar array antenna formation is one of the most complex syntheses because the array gets filled with more antenna *** machine-like complication and implementation of such an antenna arrangement with a broad opening would be *** is not easy to control the required radiation patterns shape by using a uniform feeding *** get better flexibility for sustaining the sidelobe levelheaded along with consistent amplitude *** as far as prominence has been given to the evolutionary algorithm,find an ideal solution for objective array combinational problems.

关键词： Planar array Thinning PSO Antenna array Sidelobe level Constraints Paper type Research paper

Two-electron quantum ring in short pulses

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Chinese Physics B 2015年第2期24卷 46-52页

作者： Poonam Silotia Rakesh Kumar Meena Vinod prasad Department of Physics and Astrophysics University of Delhi Department of Physics Swami Shraddhanand CollegeUniversity of Delhi

The response of a two-electron quantum ring system to the short laser pulses of different shapes in the presence of external static electric field is *** variation of transition probabilities of the two-electron quantum ring from ground state to excited states with a number of parameters is shown and *** energy levels and wavefunctions of the system in the presence of static electric field are found by solving the time-independent Schrodinger equation numerically by the finite difference *** shape of the pulse plays a dominant role on the dynamics.

关键词： quantum ring ultrashort pulses transition probability

Herbal Medicine in Ischemic Stroke:Challenges and Prospective

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Chinese Journal of Integrative Medicine 2018年第4期24卷 243-246页

作者： Bhakta prasad Gaire Department of Herbal Pharmacology College of Korean MedicineKyung Hee University

Herbal medicines, mainly of plant source, are invaluable source for the discovery of new therapeutic agents for all sorts of human ailments. The complex pathogenesis of stroke and multifactorial effect of herbal medicine and their active constituents may suggest the promising future of natural medicine for stroke treatment. Anti-oxidant, anti-inflammatory, anti-apoptotic, neuroprotective and vascular protective effect of herbal medicines are believed to be efficacious in stroke treatment. Herbs typically have fewer reported side effects than allopathic medicine, and may be safer to use over longer period of time. Herbal medicines are believed to be more effective for the longstanding health complaints, such as stroke. Several medicinal plants and their active constituents show the promising results in laboratory research. However failure in transformation of laboratory animal research to the clinical trials has created huge challenge for the use of herbal medicine in stroke. Until and unless scientifically comprehensive evidence of the efficacy and safety of herbal medicine in ischemic stroke patients is available, efforts should be made to continue implementing treatment strategies of proven effectiveness. More consideration should be paid to natural compounds that can have extensive therapeutic time windows, perfect pharmacological targets with few side effects. Herbal medicine has excellent prospective for the treatment of ischemic stroke, but a lot of effort should be invested to transform the success of animal research to human use.

关键词： herbal medicine stroke pathogenesis medicinal plant active constituent stroke therapy

Enhanced Security with Improved Defensive Routing Mechanism in Wireless Sensor Networks

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Computer Systems Science & Engineering 2023年第6期45卷 2795-2810页

作者： R.Sabitha C.Gokul prasad S.Karthik Department of Computer Science&Engineering SNS College of TechnologyCoimbatoreTamilnaduIndia Department of Electronics and Communication Engineering SNS College of EngineeringCoimbatoreTamilnaduIndia

In recent scenario of Wireless Sensor Networks(WSNs),there are many application developed for handling sensitive and private data such as military information,surveillance data,tracking,***,the sensor nodes of WSNs are distributed in an intimidating region,which is non-rigid to *** recent research domains of WSN deal with models to handle the WSN communications against malicious attacks and *** traditional models,the solution has been made for defending the networks,only to specific ***,in real-time applications,the kind of attack that is launched by the adversary is not ***,on developing a security mechanism for WSN,the resource constraints of sensor nodes are also to be *** that note,this paper presents an Enhanced Security Model with Improved Defensive Routing Mechanism(IDRM)for defending the sensor network from various ***,for efficient model design,the work includes the part of feature evaluation of some general attacks of *** IDRM also includes determination of optimal secure paths and Node security for secure routing *** performance of the proposed model is evaluated with respect to several factors;it is found that the model has achieved better security levels and is efficient than other existing models in WSN *** is proven that the proposed IDRM produces 74%of PDR in average and a minimized packet drop of 38%when comparing with the existing works.

关键词： Enhanced security model wireless sensor networks improved defensive routing mechanism secure paths node security

Diagnostic efficacy of Ziehl-Neelsen method against fluorescent microscopy in detection of acid fast bacilli

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Asian Pacific Journal of Tropical Medicine 2010年第4期3卷 328-329页

作者： Soham Gupta Vishnu prasad Shenoy Indira Bairy Muralidharan S Department of Microbiology St.Johns Medical CollegeBangaloreKarnatakaIndia 560034 Department of Microbiology Kasturba Medical collegeManipalKarnatakaIndia 576104

Objective:To investigate the application of Ziehl-Neelsen(Z-N) and fluorescent microscopy in detection of acid fast bacilli(AFB).Methods:Duplicate smears were prepared from 260 sputum samples and stained with Z-N and fluorescent staining(FS) *** efficiency of both methods in primary diagnosis of tuberculosis were ***:The smears were positive for AFB in 15(5.77%) samples by Z-N staining method and in 16(6.15%) samples by FS *** sensitivity and specificity of Z-N staining method against FS method were 93.75% and 100%***:Though lesser cost-effective than Z-N,FS method is a more sensitive and better case finding tool in detection of AFB.

关键词： Tuberculosis Acid fast bacilli Ziehl-Neelsen Fluorescent microscopy

Effect of Diffuser Vane Shape on the Performance of a Centrifugal Compressor Stage

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Journal of Thermal Science 2014年第2期23卷 127-132页

作者： T Ch Siva Reddy GV Ramana Murty MVSSSM prasad Sreenidhi Institute of Science and Technology GhatkesarHyderabadA.P.India Vasavi college of Engineering Hhyderabad

The present paper reports the results of experimental investigations on the effect of diffuser vane shape on the performance of a centrifugal compressor stage. These studies were conducted on the chosen stage having a back- ward curved impeller of 500 turn tip diameter and 24.5 mm width and its design flow coefficient is Фd=0.0535. Three different low solidity diffuser vane shapes namely uncarnbered aerofoil, constant thickness flat plate and circular arc cambered constant thickness plate were chosen as the variants for diffuser vane shape and all the three shapes have the same thickness to chord ratio （t/c=0.1）. Flow coefficient, polytropic efficiency, total head coeffi- cient, power coefficient and static pressure recovery coefficient were chosen as the parameters for evaluating the effect of diffuser vane shape on the stage performance. The results show that there is reasonable improvement in stage efficiency and total head coefficient with the use of the chosen diffuser vane shapes as compared to conven- tional vaneless diffuser. It is also noticed that the aero foil shaped LSD has shown better performance when com- pared to flat plate and circular arc profiles. The aerofoil vane shape of the diffuser blade is seen to be tolerant over a considerable range of incidence.

关键词： Centrifugal compressor Vaneless diffuser Low solidity diffuser

Savings,investment,and growth in Nepal:an empirical analysis

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Financial Innovation 2019年第1期5卷 679-691页

作者： Aadersh Joshi Sumit Pradhan Jagadish prasad Bist Global college International affiliated to Midwestern University KathmanduNepal Uniglobe college affiliated to Pokhara University KathmanduNepal The British college affiliated to University of the West of England BristolUKKathmanduNepal

This study analyzes the relationship between savings,investment,and economic growth in Nepal over 1975–*** structural breaks in the variables have been accounted for using the(Zivot and Andrews’s,J Bus Econ Stat 10:251–2701992)unit root test along with(Gregory and Hansen’s,Oxf Bull Econ Stat 58:555–560,1996)cointegration *** ARDL approach to cointegration in the presence of structural breaks has also been utilized to analyze the long-and short-run dynamics of savings,investment,and growth in *** results show structural breaks in the real GDP per capita during 2001 when the Royal Massacre and a state of emergency have taken place in *** allowing for this structural break,evidence of a cointegration relationship amongst savings,investment,and economic growth was *** estimates of the ARDL approach suggest that investment has a significant and positive impact on economic ***,gross domestic savings have a negative impact on growth in the long *** results clearly show weaknesses of the economy in mobilizing savings into productive sectors.

关键词： Savings Investment Economic Growth Structural Break ARDL Model

Defect induced room-temperature ferromagnetism and enhanced photocatalytic activity in Ni-doped ZnO synthesized by electrodeposition

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Chinese Physics B 2020年第10期29卷 566-572页

作者： Deepika Raju Kumar Ritesh Kumar Kamdeo prasad Yadav Pratyush Vaibhav Seema Sharma Rakesh Kumar Singh Santosh Kumar college o f Commerce Arts and SciencePatna.BiharIndia Jaypee University o f Engineering and Technology GunaMadhya PradeshIndia Anugrah Narayan college PatnaBiharIndia Aryabhatta Knowledge University PatnaBiharIndia

Zn0.90Ni0.10O nanoparticles have been synthesized by single-bath two-electrode electrodeposition at constant voltage. X-ray diffraction, UV vis and photoluminescence studies reveal that a single-phase polycrystalline hcp wurtzite crystal structure of ZnO is evolved. The material consists of a large number of defects such as oxygen vacancy (Ov) and zinc interstitial (Zi). The magnetization study reveals that the sample exhibits room-temperature global ferromagnetism and the ferromagnetic ordering seems to be defect induced via bound magnetic polaron mechanism, and double exchange is also expected to have played role. Interesting optoelectronic properties have been found in the synthesized sample and the material seems to be a potential candidate to be used as a UV sensor. Such a transition metal doped ZnO based dilute magnetic semiconducting system exhibiting room-temperature ferromagnetism is likely to be first of its kind in the sense that such materials have not yet been reported to be synthesized by the simple method of electrodeposition to the best of our knowledge on the basis of ample literature review.

关键词： dilute magnetic semiconductors(DMS) bound magnetic polaron photoluminescence ferromagnetism