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Needs of exploring the burden of recent onset seizures due to neurocysticercosis and challenges in southeast Asia focusing on scenario in Malaysia

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Asian Pacific Journal of Tropical Medicine 2017年第4期10卷 313-321页

作者： Sahu Priyadarshi S Lim Yvonne AL Mahmud Rohela Somanath Sushela D Tan Chong T ramachandran cp Division of Pathology School of MedicineInternational Medical University Department of Parasitology Department of MedicineFaculty of MedicineUniversity of Malaya Division of Neurology Department of MedicineFaculty of MedicineUniversity of Malaya Chairperson Programme Review GroupNeglected Tropical Diseases-WHO-Western Pacific Region

Seizures due to neurocysticercosis(NCC) is a neglected human-to-human transmitted disorder and an emerging problem worldwide.A substantial portion of recent onset seizures is known to be attributed to NCC in Taenia solium(***) endemic areas where populations which neither raise pigs nor eat pig meat are also at *** prevalence of NCC causing epilepsy has been reported in the underdeveloped areas of Southeast Asia(SEA) however,only fragmentary information on its incidence is available in countries like *** Malaysia *** infection was previously thought to be infrequent due to Muslim population majority and the religious prohibition of consuming pork,but it is not totally absent There is an evident lack of knowledge and awareness of the actual burden,routes of transmission,and the impact of NCC in this *** problem is assumed to be more prevalent particularly in cities because of the frequent inflow of possibly *** infected individuals or carriers among those who migrate from neighboring endemic countries to *** issue of imported cases that are likely to be emerging in Malaysia is highlighted *** accurate quantification of regional burdens of epilepsy due to NCC in Malaysia is warranted considering the disease emergence in its neighboring *** is suggested that the importance of NCC be recognized through quantification of its burden,and also to collect epidemiological data for its subsequent elimination in line of World Health Organization's mission for control of cysticercosis as a neglected tropical *** this review the need as well as a strategy for neurc-care center screening of epilepsy cases,and various issues with possible explanations are *** is also proposed that NCC be declared as a reportable disease which is one of the eradicable public health problems in SEA.

关键词： Seizure Recent onset seizure NTD Cysticercosis Neurocysticercosis Southeast Asia Malaysia

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High-temperature synthesis and electronic bonding analysis of Ca-doped LaMnO_(3) rare-earth manganites

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Rare Metals 2022年第11期41卷 3932-3942页

作者： Natarajan Thenmozhi ramachandran Saravanan Post Graduate and Research Department of Physics Nadar Mahajana Sangam S.Vellaichamy Nadar CollegeNagamalaiMaduraiTamil Nadu625019India Research Centre and Post Graduate Department of Physics The Madura CollegeMaduraiTamil Nadu625011India

Doped lanthanum manganites La_(1-x)Ca_(x)MnO_(3) with five different concentrations of Ca(x=0.1,0.2,0.3,0.4 and 0.5) were synthesized by high-temperature solidstate reaction method and *** prepared samples were experimentally analyzed by X-ray diffraction(XRD),ultraviolet-visible spectroscopy(UV-Vis),scanning electron microscopy/energy dispersive spectroscopy(SEM/EDS) and vibrating sample magnetometer(VSM)*** structure is confirmed for this compound from powder X-ray diffraction *** XRD data confirm the shrinkage in the unit cell of synthesized samples for increasing calcium *** UV-Visible analysis for the estimation of optical band gap(E_(g)) reveals that the band gap decreases with the incorporation of *** synthesized samples were investigated for charge density distribution using maximum entropy method,utilizing the XRD data *** the charge density analysis,it is found that the bond lengths for La-O and Mn-O bonds decrease with the addition of *** ionic nature between La and O atoms and covalent nature between Mn and O atoms are enhanced for 40% of *** 50% of Ca-doped sample,ionic nature between La and O atoms and covalent nature between Mn and O atoms *** the prepared samples exhibit ferromagnetism at 20 K and paramagnetism at 300 K.

关键词： Manganites Mixed valency Magnetocaloric Magnetoresistive SOFC

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Charge distribution around Ba-O and Ti-O bonds in BaTi_(1-x)Zr_(x)O_(3)through powder X-ray diffraction

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Rare Metals 2021年第12期40卷 3660-3667页

作者： Jegannathan Mangaiyarkkarasi ramachandran Saravanan Post Graduate and Research Department of Physics Nadar Mahajana Sangam S.Vellaichamy Nadar CollegeNagamalaiMaduraiTamil Nadu 625019India Research Centre and Post Graduate Department of Physics The Madura CollegeMaduraiTamil Nadu 625011India

Ferroelectric lead-free BaTi_(1-x)Zr_(x)O_(3)ceramic powder samples with various compositions(x=0,0.04,0.06)have been synthesized by conventional high-temperature solid-state reaction method at 1450℃for 10 *** of Zr doping on the inter-atomic bonding and charge density distributions inside the lattice structure of BaTiO_(3)were analyzed through powder X-ray diffraction(XRD)and maximum entropy *** parameter and cell volume values are found to be increasing with the incorporation of Zr *** average grain sizes are found to be in the range of 23-28 *** entropy mapping of electron density analysis reveals the reduction in ionic nature along Ba-O bond and the enhancement of covalent nature along Ti-O *** band gap values were determined from ultraviolet-visible(UV-Vis)*** morphology and microstructures of the samples were analyzed from scanning electron microscopy(SEM)*** with irregular sizes were observed in all the prepared *** of the samples was further confirmed by energydispersive X-ray spectroscopy(EDAX).

关键词： Barium zirconium titanate Structure factors Electron density Rietveld analysis Maximum entropy method

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Cellular Automata Models of Traffic Behavior in Presence of Speed Breaking Structures

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Communications in Theoretical Physics 2009年第10期52卷 646-652页

作者： Parthasarathy ramachandran Indian Institute of Science

In this article, we study traffic flow in the presence of speed breaking structures. The speed breakers are typically used to reduce the local speed of vehicles near certain institutions such as schools and hospitals. Through a cellular automata model we study the impact of such structures on giobal traffic characteristics. The simulation results indicate that the presence of speed breakers could reduce the global flow under moderate global densities. However, under low and high global density traffic regime the presence of speed breakers does not have an impact on the global flow. Further the speed limit enforced by the speed breaker creates a phase distinction. For a given global density and slowdown probability, as the speed limit enforced by the speed breaker increases, the traffic moves from the reduced flow phase to maximum flow phase. This underlines the importance of proper design of these structures to avoid undesired flow restrictions.

关键词： cellular automata traffic flow model simulation speed breakers

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The partial side information problem with additional reconstructions

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Digital Communications and Networks 2020年第1期6卷 123-128页

作者： Viswanathan ramachandran Department of Electrical Engineering Indian Institute of Technology BombayIIT AreaPowaiMumbai400076India

We consider a quadratic Gaussian distributed lossy source coding setup with an additional constraint of identical reconstructions between the encoder and the *** setup consists of two correlated Gaussian sources,wherein one of them has to be reconstructed to be within some distortion constraint and match with a corresponding reconstruction at the encoder,while the other source acts as coded side *** study the tradeoff between the rates of two encoders for a given distortion constraint on the *** explicit characterization of this trade-off is the main result of the *** also give close inner and outer bounds for the discrete memoryless version of the problem.

关键词： Rate-distortion theory Source coding Network information theory Wyner Ziv compression MMSE estimation Correlated Gaussian sources

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Gaussian broadcast channel with lossy state reconstruction

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Digital Communications and Networks 2019年第3期5卷 176-182页

作者： Viswanathan ramachandran Department of Electrical Engineering Indian Institute of Technology Bombay India

We consider a state reconstruction problem where the additive state process of a Gaussian Broadcast Channel (GBC) is to be reconstructed at both receivers, subject to some distortion constraints. The state process we consider is Gaussian, independently and identically distributed, and known fully a-priori at the encoder. Each receiver has to perform a lossy estimation, to within some prescribed distortion tolerance under a squared error distortion criterion. The set-up also involves communicating messages across to the receivers, in addition to the estimation. The optimal trade-off between the distortions incurred at the receivers and the rates at which messages can be communicated, is of interest. We provide a complete characterization of the optimal rate vs. distortion performance.

关键词： Broadcast channel State transmission Dirty paper coding MMSE estimation

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Microstructural characterization,tribological and corrosion behavior of AA7075-TiC composites

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China Foundry 2024年第4期21卷 334-342页

作者： Surendarnath Sundaramoorthy Ramesh Gopalan ramachandran Thulasiram Department of Mechanical Engineering DVR&Dr.HS MIC College of Technology(A)Vijayawada521180India Department of Metallurgical and Materials Engineering Rajiv Gandhi University of Knowledge TechnologiesRK ValleyKadapaIndia Department of Mechanical Engineering Jain UniversityBangaloreIndia

Aluminum alloys are the potential materials in the automobile and aerospace sectors due to their lower density,easy forming and excellent corrosion *** demand of high strength-to-weight ratio materials in structural applications needs the engineering industries to seek aluminum alloy with new versions of hard and brittle ceramic *** microstructure,hardness,wear and corrosion behaviors of AA7075 composites with 2.5wt.%and 5wt.%TiC particles were *** analysis is evident that the transformation of the strong dendritic morphology to non-dendritic morphology on the incorporation of TiC into ***,the precipitation of the second-phase compounds such as Al_(2)CuMg,Al_(2)Cu andFe-rich Al_6(Cu,Fe)/Al_(7)Cu_(2)Fe)is promoted by TiC particles at inter-and intra-dendritic ***,the hardness of composites is improved by grain boundary strengthening and particulate strengthening *** coefficient of friction and wear rate have an inverse relation with TiC *** base alloy without TiC shows adhesive-type wear-induced deformation due to the formation of an oxide film,while composite samples exhibit a mechanically mixed layer and abrasive-type wear *** samples shows a higher corrosion rate due to the presence of numerous precipitates which promote pitting corrosion.

关键词： AA7075 alloy TiC reinforcement composite microstructure wear corrosion tribological

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In-plane and out-of-plane quasi-static compression performance enhancement of 3D printed re-entrant diamond auxetic metamaterial with geometrical tuning and fiber reinforcement

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Defence Technology（防务技术） 2023年第7期25卷 1-17页

作者： Niranjan Chikkanna Shankar Krishnapillai Velmurugan ramachandran Department of Mechanical Engineering Indian Institute of Technology Madras600036India Department of Aerospace Engineering Indian Institute of Technology Madras600036India

Auxetic materials are cellular materials with a unique property of negative Poisson’s *** auxeticity and performance of these metamaterials utterly depend on the geometrical parameters and loading *** the first time,the quasi-static uniaxial compression performance of fused filament fabricated re-entrant diamond auxetic metamaterial is evaluated in the x-direction(in-plane)and z-direction(out-of-plane).The most commonly used thermoplastic feedstock,Acrylonitrile butadiene styrene,is considered a material of *** effect of influential geometrical parameters of the re-entrant diamond structure and printing parameter is systematically studied using Taguchi’s design of ***-based multi-objective optimisation technique has been adopted to arrive at the optimal *** are made to improve the stiffness and strength of the structure with fibre *** glass fibre reinforcements have enhanced specific strength and stiffness in both in-plane and out-ofplane directions.A sevenfold and thirteen times increase in specific strength and energy absorption is evident for glass fibre-reinforced structures in out-of-plane directions compared to in-plane *** tuning of geometrical parameters of the re-entrant diamond structure can result in a Poisson’s ratio of up to-3.49 when tested in the *** parametric study has illustrated the tailorability of the structure according to the application *** statistical study has signified each considered parameter’s contribution to the compression performance characteristics of the 3D printed re-entrant diamond auxetic metamaterial.

关键词： Auxeticity Fibre reinforcement Tailorability Anisotropy Geometrical influence Property enhancement

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Intrusion Detection Model Using Chaotic MAP for Network Coding Enabled Mobile Small Cells

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Computers, Materials & Continua 2024年第3期78卷 3151-3176页

作者： Chanumolu Kiran Kumar Nandhakumar ramachandran School of Computer Science and Engineering VIT-AP UniversityAmaravatiAndhra Pradesh522241India

Wireless Network security management is difficult because of the ever-increasing number of wireless network malfunctions,vulnerabilities,and *** security systems,such as Intrusion Detection Systems(IDS),are essential due to the limitations of simpler security measures,such as cryptography and *** to their compact nature and low energy reserves,wireless networks present a significant challenge for security *** features of small cells can cause threats to the *** Coding(NC)enabled small cells are vulnerable to various types of *** attacks and performing secure“peer”to“peer”data transmission is a challenging task in small *** to the low power and memory requirements of the proposed model,it is well suited to use with constrained small *** attacker cannot change the contents of data and generate a new Hashed Homomorphic Message Authentication Code(HHMAC)hash between transmissions since the HMAC function is generated using the shared *** this research,a chaotic sequence mapping based low overhead 1D Improved Logistic Map is used to secure“peer”to“peer”data transmission model using lightweight H-MAC(1D-LM-P2P-LHHMAC)is proposed with accurate intrusion *** proposed model is evaluated with the traditional models by considering various evaluation metrics like Vector Set Generation Accuracy Levels,Key Pair Generation Time Levels,Chaotic Map Accuracy Levels,Intrusion Detection Accuracy Levels,and the results represent that the proposed model performance in chaotic map accuracy level is 98%and intrusion detection is 98.2%.The proposed model is compared with the traditional models and the results represent that the proposed model secure data transmission levels are high.

关键词： Network coding small cells data transmission intrusion detection model hashed message authentication code chaotic sequence mapping secure transmission

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Multi-Factor Authentication for Secured Financial Transactions in Cloud Environment

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Computers, Materials & Continua 2022年第1期70卷 1781-1798页

作者： D.Prabakaran Shyamala ramachandran IFET College of Engineering Villupuram605108TamilnaduIndia University College of Engineering-Tindivanam Tindivanam604001TamilnaduIndia

The rise of the digital economy and the comfort of accessing by way of user mobile devices expedite human endeavors in financial transactions over the Virtual Private Network(VPN)*** prominent application of VPN evades the hurdles involved in physical money *** VPN acts as a gateway for the authorized user in accessing the banking server to provide mutual authentication between the user and the *** security in the cloud authentication server remains vulnerable to the results of threat in JP Morgan Data breach in 2014,Capital One Data Breach in 2019,and manymore cloud server attacks over and over *** attacks necessitate the demand for a strong framework for authentication to secure from any class of *** research paper,propose a framework with a base of EllipticalCurve Cryptography(ECC)to performsecure financial transactions throughVirtual PrivateNetwork(VPN)by implementing strongMulti-Factor Authentication(MFA)using authentication credentials and biometric *** research results prove that the proposed model is to be an ideal scheme for real-time *** security analysis reports that the proposed model exhibits high level of security with a minimal response time of 12 s on an average of 1000 users.

关键词： Cloud computing elliptical curve cryptography multi-factor authentication mel frequency cepstral coefficient privacy protection secured framework secure financial transactions

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