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effect of Nitrogen Doping on the electrical Properties of 3C-SiC Thin Films for high-Temperature Sensors Applications

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Acta Metallurgica Sinica(english Letters) 2014年第1期27卷 168-174页

作者： h.k.e.latha A.Udayakumar V.Siddeswara Prasad Department of Instrumentation Technology Siddaganga Institute of Technology Materials Science Division Council of Scientific and Industrial Research-National Aerospace Laboratories

3C-SiC is a promising structural material for piezoresistive sensors used in high-temperature applications. For sensor development, the preparation of sensor materials and study of its electrical properties, such as resistivity, barrier height of grain boundaries, and temperature coefficient of resistivity, are important in addition to structural properties and these have to be optimized. In the present work, 3C-SiC thin film with in situ doping of nitrogen is prepared through low- pressure chemical vapor deposition by using methyl trichloro silane, ammonia, and hydrogen as precursors. electrical properties of deposited 3C-SiC thin films with varying nitrogen doping concentration through four probe technique are studied. Atomic force microscopy investigations are carried out to study the grain size on and average root-mean-squared roughness 3C-SiC thin films. A decrease in the degree of crystallinity is observed in nitrogen-doped 3C-SiC thin films. The sheet resistivity of nitrogen-doped 3C-SiC thin film is found to decrease with increase in temperature in the range from 303 to 823 k. The sheet resistivity, average temperature coefficient of resistance, and barrier height of the grain boundaries of film doped with 17 at.% of nitrogen are 0.14 cm, -1.0 x 10-n/k, and 0.01 eV, respectively. Comparing all the nitrogen-doped 3C-SiC thin films, the film doped with 17 at.% of nitrogen exhibits an improved structural and electrical properties and it can be used as sensing material for high-temperature applications.

关键词： Low-pressure chemical vapor deposition (LPCVD) 3C-SiC thin film Resistivity Barrier height of grain boundaries: Temperature coefficient of resistivitv (TCR)

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NeCAB family of neuronal calcium-binding proteins in health and disease

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Neural Regeneration Research 2025年第5期20卷 1236-1243页

作者： Diones Bueno Michael k.e.Schafer Sudena Wang Michael J.Schmeisser Axel Methner Institute for Molecular Medicine University Medical Center of the Johannes Gutenberg-UniversityMainzGermany Department of Anesthesiology University Medical Center of the Johannes Gutenberg-UniversityMainzGermany Institute of Anatomy University Medical Center of the Johannes Gutenberg-UniversityMainzGermany

The N-terminal eF-hand calcium-binding proteins 1–3(NeCAB1–3) constitute a family of predominantly neuronal proteins characterized by the presence of at least one eF-hand calcium-binding domain and a functionally less well characterized C-terminal antibiotic biosynthesis monooxygenase domain. All three family members were initially discovered due to their interactions with other proteins. NeCAB1 associates with synaptotagmin-1, a critical neuronal protein involved in membrane trafficking and synaptic vesicle exocytosis. NeCAB2 interacts with predominantly striatal G-protein-coupled receptors, while NeCAB3 partners with amyloid-β A4 precursor protein-binding family A members 2 and 3, key regulators of amyloid-β production. This demonstrates the capacity of the family for interactions with various classes of proteins. NeCAB proteins exhibit distinct subcellular localizations: NeCAB1 is found in the nucleus and cytosol, NeCAB2 resides in endosomes and the plasma membrane, and NeCAB3 is present in the endoplasmic reticulum and Golgi apparatus. The antibiotic biosynthesis monooxygenase domain, an evolutionarily ancient component, is akin to atypical heme oxygenases in prokaryotes but is not wellcharacterized in vertebrates. Prokaryotic antibiotic biosynthesis monooxygenase domains typically form dimers, suggesting that calcium-mediated conformational changes in NeCAB proteins may induce antibiotic biosynthesis monooxygenase domain dimerization, potentially activating some enzymatic properties. however, the substrate for this enzymatic activity remains uncertain. Alternatively, calcium-mediated conformational changes might influence protein interactions or the subcellular localization of NeCAB proteins by controlling the availability of protein–protein interaction domains situated between the eF hands and the antibiotic biosynthesis monooxygenase domain. This review summarizes what is known about genomic organization, tissue expression, intracellular localization, interac

关键词： calcium eF hand mitochondria nervous system signal transduction

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Free vibration and transient response of double curved beams connected by intermediate straight beams

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Applied Mathematics and Mechanics(english edition) 2025年第1期46卷 37-62页

作者： R.A.JAFARI-TALOOkOLAeI h.GhANDVAR e.JUMAeV S.khATIR T.CUONG-Le School of Mechanical engineering Babol Noshirvani University of Technology Department of Mechanical engineering Faculty of Engineering New Uzbekistan University University of Business and Science Center for engineering Application and Technology Solutions Ho Chi Minh City Open University

This paper investigates the free vibration and transient response of interconnected structures including double curved beams and intermediate straight beams,which are all constructed from functionally graded porous(FGP) materials. The strain potential and kinetic energies of each beam along with the work done by the external force are calculated. Additionally, a higher-order beam element is introduced to derive stiffness and mass matrices, along with the force vector. The curved and straight beams are discretized, and their assembled stiffness, mass matrices, and force vectors, are *** conditions at the joints are used to derive the total matrices of the entire structure. Subsequently, the natural frequencies and transient response of the system are determined. The accuracy of the mathematical model and the self-developed computer program is validated through the comparison of the obtained results with those of the existing literature and commercial software ANSYS, demonstrating excellent ***, a comprehensive study is conducted to investigate the effects of various parameters on the free vibration and transient response of the considered structure.

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The sexually dimorphic expression of glutamate transporters and their implication in pain after spinal cord injury

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Neural Regeneration Research 2025年第11期20卷 3317-3329页

作者： Jennifer M.Colón-Mercado Aranza I.Torrado-Tapias Iris k.Salgado Jose M.Santiago Samuel e.Ocasio Rivera Dina P.Bracho-Rincon Luis h.Pagan Rivera Jorge D.Miranda Department of Physiology University of Puerto RicoMedical Sciences CampusSan JuanPRUSA National Institutes of health National Human Genome Research InstituteBethesdaMDUSA Universidad Central del Caribe School of MedicineBayamónPRUSA University of Puerto Rico Carolina CampusCarolinaPRUSA Institute of Neurobiology San JuanPRUSA

In addition to the loss of motor function,~60% of patients develop pain after spinal cord *** cellular-molecular mechanisms are not well understood,but the data suggests that plasticity within the rostral,epicenter,and caudal penumbra of the injury site initiates a cellularmolecular interplay that acts as a rewiring mechanism leading to central neuropathic *** can lead to the formation of new connections triggering abnormal sensory *** excitatory glutamate transporters are responsible for the reuptake of extracellular glutamate which makes them a critical target to prevent neuronal hyperexcitability and *** previous studies showed a sexually dimorphic therapeutic window for spinal cord injury after treatment with the selective estrogen receptor modulator *** this study,we investigated the anti-allodynic effects of tamoxifen in male and female rats with spinal cord *** hypothesized that tamoxifen exerts anti-allodynic effects by increasing the expression of glutamate transporters,leading to reduced hyperexcitability of the secondary neuron or by decreasing aberrant *** and female rats received a moderate contusion to the thoracic spinal cord followed by subcutaneous slow-release treatment of tamoxifen or matrix pellets as a control(placebo).We used von Frey monofilaments and the“up-down method”to evaluate mechanical *** treatment decreased allodynia only in female rats with spinal cord injury revealing a sexdependent *** expression profile of glutamatergic transporters(excitatory amino acid transporter 1/glutamate aspartate transporter and excitatory amino acid transporter 2/glutamate transporter-1)revealed a sexual dimorphism in the rostral,epicenter,and caudal areas of the spinal cord with a pattern of expression primarily on *** rodents showed a significantly higher level of excitatory amino acid transporter-1 expression while male rodents showed increased

关键词： allodynia central neuropathic pain eAAT-1/GLAST eAAT-2/GLT-1 glutamate transporters selective estrogen receptor modulator sexual dimorphism spinal cord injury trauma

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Gorilla Troops Optimizer Based Fault Tolerant Aware Scheduling Scheme for Cloud environment

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Intelligent Automation & Soft Computing 2023年第2期35卷 1923-1937页

作者： R.Rengaraj k.latha Department of Information Technology Saranathan College of EngineeringTiruchirapalli620012TamilnaduIndia Department of Computer Science and engineering Anna University(BIT Campus)Trichy620024TamilnaduIndia

In cloud computing(CC),resources are allocated and offered to the cli-ents transparently in an on-demand *** can happen in CC environment and the cloud resources are adaptable toﬂuctuations in the performance *** execution failure becomes common in the CC ***,fault-tolerant scheduling techniques in CC environment are essential for handling performance differences,resourceﬂuxes,and ***,several intelli-gent scheduling approaches have been developed for scheduling tasks in CC with no consideration of fault tolerant *** this motivation,this study focuses on the design of Gorilla Troops Optimizer Based Fault Tolerant Aware Scheduling Scheme(GTO-FTASS)in CC *** proposed GTO-FTASS model aims to schedule the tasks and allocate resources by considering fault tolerance into *** GTO-FTASS algorithm is based on the social intelligence nature of gorilla ***,the GTO-FTASS model derives aﬁtness function involving two parameters such as expected time of completion(eTC)and failure probability of executing a *** addition,the presented fault detector can trace the failed tasks or VMs and then schedule heal submodule in sequence with a remedial or retrieval scheduling *** experimental vali-dation of the GTO-FTASS model has been performed and the results are inspected under several *** comparative analysis reported the better outcomes of the GTO-FTASS model over the recent approaches.

关键词： Cloud computing gorilla troops optimizer task scheduling fault tolerant task completion time failure probability

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A Parallel Approach for Sentiment Analysis on Social Networks Using Spark

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Intelligent Automation & Soft Computing 2023年第2期35卷 1831-1842页

作者： M.Mohamed Iqbal k.latha Vel Tech Rangarajan Dr.Sagunthala R&D Institute of Science and Technology Chennai600062India University College of engineering Anna University(B.I.T Campus)Tiruchirappalli620024India

The public is increasingly using social media platforms such as Twitter and Facebook to express their views on a variety of *** a result,social media has emerged as the most effective and largest open source for obtaining public *** node computational methods are inefﬁcient for sentiment analysis on such large *** or parallel or distributed proces-sing are two options for dealing with such large amounts of *** parallel programming frameworks,such as MPI(Message Processing Interface),are dif-ﬁcult to use and scale in environments where supercomputers are *** the Apache Spark Parallel Model,this proposed work presents a scalable system for sentiment analysis on Twitter.A Spark-based Naive Bayes training technique is suggested for this purpose;unlike prior research,this algorithm does not need any disk *** of tweets have been classiﬁed using the trained *** with various-sized clusters reveal that the suggested strategy is extremely scalable and cost-effective for larger data *** is nearly 12 times quicker than the Map Reduce-based model and nearly 21 times faster than the Naive Bayes Classiﬁer in Apache *** evaluate the framework’s scalabil-ity,we gathered a large training corpus from *** accuracy of the classi-ﬁer trained with this new dataset was more than 80%.

关键词： Social networks sentiment analysis big data spark tweets classiﬁcation

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Machine Learning-Based Threatened Species Translocation Under Climate Vulnerability

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Intelligent Automation & Soft Computing 2023年第4期36卷 327-337页

作者： Nandhi kesavan latha Department of Computer Science&engineering Anna University(BIT Campus)Tiruchirappalli620024India

Climate change is the most serious causes and has a direct impact on *** to the world’s biodiversity conservation organization,rep-tile species are most affected since their biological and ecological qualities are directly linked to *** to a lack of time frame in existing works,conser-vation adoption affects the performance of existing *** proposed research presents a knowledge-driven Decision Support System(DSS)including the assisted translocation to adapt to future climate change to conserving from its *** Dynamic approach is used to develop a knowledge-driven DSS using machine learning by applying an ecological and biological variable that characterizes the model and mitigation processes for ***,the frame-work demonstrates the huge difference in the estimated signiﬁcance of climate change,the model strategy helps to recognize the probable risk of threatened spe-cies translocation to future climate *** proposed system is evaluated using various performance metrics and this framework can comfortably adapt to the decisions support to reintroduce the species for conservation in the future.

关键词： Machine learning climate change decision support system multiple regression conservation area receiver operating curve

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Occupational heat stress induced health impacts:A cross-sectional study from South Indian working population

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Advances in Climate Change Research 2020年第1期11卷 31-39页

作者： Vidhya VeNUGOPAL P.k.latha Rekha ShANMUGAM Manikandan kRIShNAMOORThY Priscilla JOhNSON Faculty of Public health Sri Ramachandra Institute of Higher Education and ResearchChennai600116India Department of Physiology Sri Ramachandra Institute of Higher Education and ResearchChennai600116India

Rising temperature and heat stress risks in the changing climate scenario might potentially affect workers globally,especially the ones with strenuous workload in tropical *** used a cross-sectional study design to profile the heat exposures of-1900 workers from eight industrial sectors using a Ques Temp Wet Bulb Globe Temperature(WBGT)monitor,quantified select heat-strain indicators viz.,rise in Core Body Temperature,Sweat Rate,and Urine Specific Gravity and evaluated the perceived health impacts of heat stress using a structured *** exposures(average WBGT:30.1±2.6℃)exceeded the Threshold Limit Value for 67%workers and was positively associated with the rise in Core Body Temperature>1℃ in 13%and elevated Urine Specific Gravity>1.020 in 9%***-related health concerns were reported by 86%workers,and the heat-exposed workers had 2.3 times higher odds of adverse health outcomes compared to unexposed workers(pexposure to higher WBGT and adverse renal health among salt-pan workers were significantly associated(p=0.004),and steel workers had 9% prevalence of kidney *** presented clearly points to heat stress as a health and productivity risk factor that could have long-term and irreversible health ***-depth assessments are urgently needed to develop scientifically sound preventative interventions and protective labor policies to avert the adverse occupational health and productivity consequences for millions of workers globally,thereby aiding poverty reduction.

关键词： Climate change Occupational heat stress Physiological heat strain Renal issues Dehydration Workload

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Sammon Quadratic Recurrent Multilayer Deep Classifier for Legal Document Analytics

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Computers, Materials & Continua 2022年第8期72卷 3039-3053页

作者： Divya Mohan latha Ravindran Nair School of engineering Cochin University of Science and TechnologyKeralaIndia

In recent years,machine learning algorithms and in particular deep learning has shown promising results when used in the field of legal *** legal field is strongly affected by the problem of information overload,due to the large amount of legal material stored in textual *** text processing is essential in the legal domain to analyze the texts of the court events to automatically predict smart *** an increasing number of digitally available documents,legal text processing is essential to analyze documents which helps to automate various legal domain *** document classification is a valuable tool in legal services for enhancing the quality and efficiency of legal document *** this paper,we propose Sammon keyword Mapping-based Quadratic Discriminant Recurrent Multilayer Perceptive Deep Neural Classifier(SkM-QDRMPDNC),a system that applies deep neural methods to the problem of legal document *** SkM-QDRMPDNC technique consists of many layers to perform the keyword extraction and ***,the set of legal documents are collected from the *** the keyword extraction is performed using SammonMapping technique based on the distance *** the extracted features,Quadratic Discriminant analysis is applied to performthe document classification based on the likelihood ratio ***,the classified legal documents are obtained at the output *** process is repeated until minimum error is *** experimental assessment is carried out using various performance metrics such as accuracy,precision,recall,F-measure,and computational time based on several legal documents collected from the *** observed results validated that the proposed SkM-QDRMPDNC technique provides improved performance in terms of achieving higher accuracy,precision,recall,and F-measure with minimum computation time when compared to existing methods.

关键词： Legal document data analytics recurrent multilayer perceptive deep neural network sammon mapping quadratic discriminant analysis likelihood ratio test

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Regression analysis of squeezing-induced hybrid nanofluid flow in Darcy-Forchheimer porous medium

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Applied Mathematics and Mechanics(english edition) 2025年第1期46卷 193-208页

作者： k.MUhAMMAD M.SARFRAZ Department of humanities and Sciences School of Electrical Engineering and Computer Science National University of Sciences and Technology Department of Mathematics Quaid-i-Azam University

This article presents a mathematical model addressing a scenario involving a hybrid nanofluid flow between two infinite parallel plates. One plate remains stationary, while the other moves downward at a squeezing velocity. The space between these plates contains a Darcy-Forchheimer porous medium. A mixture of water-based fluid with gold(Au) and silicon dioxide(Si O2) nanoparticles is formulated. In contrast to the conventional Fourier's heat flux equation, this study employs the Cattaneo-Christov heat flux equation. A uniform magnetic field is applied perpendicular to the flow direction, invoking magnetohydrodynamic(MhD) effects. Further, the model accounts for Joule heating, which is the heat generated when an electric current passes through the fluid. The problem is solved via NDSolve in MATheMATICA. Numerical and statistical analyses are conducted to provide insights into the behavior of the nanomaterials between the parallel plates with respect to the flow, energy transport, and skin *** findings of this study have potential applications in enhancing cooling systems and optimizing thermal management strategies. It is observed that the squeezing motion generates additional pressure gradients within the fluid, which enhances the flow rate but reduces the frictional drag. Consequently, the fluid is pushed more vigorously between the plates, increasing the flow velocity. As the fluid experiences higher flow rates due to the increased squeezing effect, it spends less time in the region between the plates. The thermal relaxation, however, abruptly changes the temperature, leading to a decrease in the temperature fluctuations.

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