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Acoustical properties of a 3d printed honeycomb structure filled with nanofillers:Experimental analysis and optimization for emerging applications

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defence Technology（防务技术） 2024年第5期35卷 248-258页

作者： Jeyanthi Subramanian Vinoth kumar selvaraj Rohan Singh Ilangovan S Naresh Kakur Ruban Whenish School of Mechanical Engineering Vellore Institute of TechnologyChennai600127Tamil NaduIndia department of Mechanical Engineering SRM Institute of Science and TechnologyRamapuramChennai600089India department of Chemical Engineering and Materials Science University of Southern CaliforniaLos Angeles90089USA Advanced Materials Research Centre Technology Innovation InstituteAbu Dhabi9639UAE Center for Biomaterials Cellular and Molecular TheranosticsVellore Institute of TechnologyVellore632014Tamil NaduIndia

The novelty of this research lies in the successful fabrication of a 3d-printed honeycomb structure filled with nanofillers for acoustic properties,utilizing an impedance tube setup in accordance with ASTM standard E *** Creality Ender-3,a 3d printer,was used for printing the honeycomb structures,and polylactic acid(PLA)material was employed for their *** organic,inorganic,and polymeric compounds within the composites were identified using fourier transformation infrared(FTIR)*** structure and homogeneity of the samples were examined using a field emission scanning electron microscope(FESEM).To determine the sound absorption coefficient of the 3d printed honeycomb structure,numerous samples were systematically developed using central composite design(CCd)and analysed using response surface methodology(RSM).The RSM mathematical model was established to predict the optimum values of each factor and noise reduction coefficient(NRC).The optimum values for an NRC of 0.377 were found to be 1.116 wt% carbon black,1.025 wt% aluminium powder,and 3.151 mm distance between parallel ***,the results demonstrate that a 3dprinted honeycomb structure filled with nanofillers is an excellent material that can be utilized in various fields,including defence and aviation,where lightweight and acoustic properties are of great importance.

关键词： 3d printing Honeycomb structure Acoustics Field emission scanning electron microscope Response surface methodology

Classification of Rings Associated with the Genus of Clean Graphs

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Algebra Colloquium 2024年第3期31卷 451-466页

作者： V.Ramanathan C.selvaraj Aaqib Altaf S.Pirzada department of Mathematics Periyar UniversitySalem 636011Tamil NaduIndi department of Mathematics University of KashmirHazratbalSrinagarKashmirIndia

Let R be a ring(not necessarily commutative)with identity 1 and let CL(R)be its clean *** this paper,we investigate the genus number of the compact Riemann surface in which CL(R)can be embedded and explicitly determine all commutative rings R(up to isomorphism)such that CL(R)has genus at most *** is shown that for any Artinian ring R,CL(R)is a projective graph if and only if R is isomorphic to ***,we determine all isomorphism classes of commutative rings whose clean graphs have crosscap two.

关键词： clean graph commutative ring planar graph genus crosscap

Gray-Hole Attack Minimization in IoMT with 5G Based d2d Networks

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Computer Systems Science & Engineering 2022年第9期42卷 1289-1303页

作者： V.Balaji P.selvaraj department of Computing Technologies College of Engineering and TechnologyFaculty of Engineering and TechnologySRM Institute of Science and TechnologyKattankulathur603203TamilnaduIndia

Reliable transmission is vital to the success of the next generation ofcommunications technologies and Fifth Generation (5G) networks. Many sensitive applications, such as eHealth and medical services, can benefit from a 5G network. The Internet of Medical Things (IoMT) is a new field that fosters themaintenance of trust among various IoMT device to device (d2d) modern technologies. In IoMT the medical devices have to be connected through a wirelessnetwork and constantly needs to be self-configured to provide consistent and effi-cient data transmission. The medical devices need to be connected with sophisticated protocols and architecture to handle the synergy of the monitoring ***, one of the commonly used algorithms in d2d communication is the Optimized Link State Routing protocol (OLSR). The OLSR is considerably good ateffectively utilizing the bandwidth and reserving the paths. One of the majorattack against the OLSR is the Node isolation attack, also known as the Gray holedenial of service attack. The Gray hole attack exploits the vulnerabilities presentwith sharing the topological information of the network. The attackers may usethis topological information to maliciously disconnect the target nodes from theexisting network and stops rendering the communication services to the victimnode. Hence, considering the sensitivity and security concerns of the data usedin e-Health applications, these types of attacks must be detected and disabledproactively. In this work, a novel Node Authentication (NA) with OLSR is proposed. The simulation experiments illustrated that the proposed protocol has anexcellent Packet delivery Ratio, minimal End-End delay, and minimal Packet losswhen compared to the Ad-hoc On-demand distance Victor (AOdV) protocol andthe proposed authentication scheme was able to protect the OLSR protocol from anode isolation attack.

关键词： 5G AOdV d2d IoMT OLSR security issues

depth Map Prediction of Occluded Objects Using Structure Tensor with Gain Regularization

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Intelligent Automation & Soft Computing 2023年第7期37卷 1145-1161页

作者： H.Shalma P.selvaraj department of Computing Technologies Faculty of Engineering and TechnologySchool of ComputingSRM Institute of Science and TechnologyKattankulathurChennai603203Tamil NaduIndia

The creation of the 3d rendering model involves the prediction of an accurate depth map for the input images.A proposed approach of a modified semi-global block matching algorithm with variable window size and the gradient assessment of objects predicts the depth map.3d modeling and view synthesis algorithms could effectively handle the obtained disparity *** work uses the consistency check method to find an accurate depth map for identifying occluded *** prediction of the disparity map by semi-global block matching has used the benchmark dataset of Middlebury stereo for *** improved depth map quality within a reasonable process-ing time outperforms the other existing depth map prediction *** experimental results have shown that the proposed depth map predictioncould identify the inter-object boundaryeven with the presence ofocclusion with less detection error and *** observed that the Middlebury stereo dataset has very few images with occluded objects,which made the attainment of gain *** this gain,we have created our dataset with occlu-sion using the structured lighting *** proposed regularization term as an optimization process in the graph cut algorithm handles occlusion for different smoothing *** experimented results demonstrated that our dataset had outperformed the Tsukuba dataset regarding the percentage of occluded pixels.

关键词： depth maps occlusion detection reconstruction refined disparity map

Nanotechnologies in Food Science:Applications,Recent Trends,and Future Perspectives

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Nano-Micro Letters 2020年第3期12卷 218-251页

作者： Shivraj Hariram Nile Venkidasamy Baskar dhivya selvaraj Arti Nile Jianbo Xiao Guoyin Kai Laboratory of Medicinal Plant Biotechnology College of PharmacyZhejiang Chinese Medical UniversityHangzhou 310053ZhejiangPeople’s Republic of China Plant Genetic Engineering Laboratory Department of BiotechnologyBharathiar UniversityCoimbatoreTamil NaduIndia department of Bioresources and Food Science Sanghuh College of Life SciencesKonkuk UniversitySeoul 05029Republic of Korea Institute of Chinese Medical Sciences State Key Laboratory of Quality Control in Chinese MedicineUniversity of MacaoMacaoMacao SARPeople’s Republic of China

Nanotechnology is a key advanced technology enabling contribution,development,and sustainable impact on food,medicine,and agriculture *** have potential to lead qualitative and quantitative production of healthier,safer,and high-quality functional foods which are perishable or semi-perishable in *** are superior than conventional food processing technologies with increased shelf life of food products,preventing contamination,and production of enhanced food *** comprehensive review on nanotechnologies for functional food development describes the current trends and future perspectives of advanced nanomaterials in food sector considering processing,packaging,security,and *** of nanotechnologies enhance the food bioavailability,taste,texture,and consistency,achieved through modification of particle size,possible cluster formation,and surface charge of food *** addition,the nanodelivery-mediated nutraceuticals,synergistic action of nanomaterials in food protection,and the application of nanosensors in smart food packaging for monitoring the quality of the stored foods and the common methods employed for assessing the impact of nanomaterials in biological systems are also discussed.

关键词： Nanomaterials Functional food Food processing Nanodelivery Bioavailability

Catalytic activity of TiO_2 nanoparticles in the synthesis of some2,3-disubstituted dihydroquinazolin-4(1H)-ones

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Chinese Chemical Letters 2014年第2期25卷 324-326页

作者： A.Bharathi selvaraj Mohana Roopan Amir Kajbafvala R.d.Padmaja M.S.darsana G.Nandhini Kumari Chemistry Research Laboratory Organic Chemistry DivisionSchool of Advanced SciencesVIT University department of Materials Science and Engineering.North Carolina State University department of Chemistry.PSGR Krishnammal College for Women

Green chemistry is playing an important role for synthesizing organic compounds, due to its eco-friendly nature and low cost. In green chemistry, metal nanoparticles exhibited some useful physical and chemical properties （catalytic activity）. due to its diverse properties, nanoparticles can be utilized as a catalyst in various organic reactions. Recent research has been directed towards the utilization of eco- friendly and bio-friendly plant materials in nanoparticles synthesis. In our present work, TiO2 nanoparticles （TiO2 NPs） were synthesized using Annona squamosa peel extract and their catalytic applications were studied on the 2,3-disubstituted dihydroquinazolin-4（l1H）-one synthesis. Synthesized compounds were confirmed using FT-IR.1H NMR, 13C NMR and GC-MS analyses.

关键词： TiO2 nanoparticles Quinazolin-4(1H)-one Green chemistry

Insulin resistance in diabetes: The promise of using induced pluripotent stem cell technology

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World Journal of Stem Cells 2021年第3期13卷 221-235页

作者： Ahmed K Elsayed.selvaraj Vimalraj Manjula Nandakumar Essam M Abdelalim diabetes Research Center Qatar Biomedical Research InstituteHamad Bin Khalifa UniversityQatar FoundationDoha 34110Qatar Centre for Biotechnology Anna UniversityChennai 600025India College of Health and Life Sciences Hamad Bin Khalifa UniversityQatar FoundationDoha 34110Qatar

Insulin resistance(IR)is associated with several metabolic disorders,including type 2 diabetes(T2d).The development of IR in insulin target tissues involves genetic and acquired *** at genetic risk for T2d tend to develop IR several years before glucose *** rodent models for both IR and T2d are being used to study the disease pathogenesis;however,these models cannot recapitulate all the aspects of this complex disorder as seen in each *** pluripotent stem cells(hPSCs)can overcome the hurdles faced with the classical mouse models for studying *** induced pluripotent stem cells(hiPSCs)can be generated from the somatic cells of the patients without the need to destroy a human ***,patient-specific hiPSCs can generate cells genetically identical to IR individuals,which can help in distinguishing between genetic and acquired defects in insulin *** the technologies of genome editing and hiPSCs may provide important information about the genetic factors underlying the development of different forms of *** studies are required to fill the gaps in understanding the pathogenesis of IR and *** this review,we summarize the factors involved in the development of IR in the insulin-target tissues leading to ***,we highlight the use of hPSCs to understand the mechanisms underlying the development of IR.

关键词： Type 2 diabetes Insulin target tissues Human pluripotent stem cells Induced pluripotent stem cells Genetic factors disease modeling

An Intelligent Prediction Model for Target Protein Identification in Hepatic Carcinoma Using Novel Graph Theory and ANN Model

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Computer Modeling in Engineering & Sciences 2022年第10期133卷 31-46页

作者： G.Naveen Sundar Stalin selvaraj d.Narmadha K.Martin Sagayam A.Amir Anton Jone Ayman A.Aly dac-Nhuong Le Computer Science and Engineering Karunya Institute of Technology and SciencesCoimbatore641114India Centre for Nanotechnology&Advanced Biomaterials(CeNTAB) School of Chemical&BiotechnologySASTRA Deemed to be UniversityThanjavur613401India department of ECE Karunya Institute of Technology and SciencesCoimbatore641114India department of Mechanical Engineering College of EngineeringTaif UniversityTaif21944Saudi Arabia Institute of Research and development Duy Tan UniversityDanang550000Vietnam Faculty of Information Technology Duy Tan UniversityDanang550000Vietnam

Hepatocellular carcinoma(HCC)is one major cause of cancer-related mortality around the ***,at advanced stages of HCC,systematic treatment options are currently *** a result,new pharmacological targetsmust be discovered regularly,and then tailored medicines against HCC must be *** this research,we used biomarkers of HCC to collect the protein interaction network related to ***,dC(degree Centrality)was employed to assess the importance of each *** an improved Graph Coloring algorithm was used to rank the target proteins according to the interaction with the primary target protein after assessing the top ranked proteins related to ***,physio-chemical proteins are used to evaluate the outcome of the top ranked *** proposed graph theory and machine learning techniques have been compared with six existing *** the proposed approach,16 proteins have been identified as potential therapeutic drug targets for Hepatic *** is observable that the proposed method gives remarkable performance than the existing centrality measures in terms of Accuracy,Precision,Recall,Sensitivity,Specificity and F-measure.

关键词： drug target detection hepatic carcinoma degree centrality graph coloring artificial neural network model

Effect of tilt angle on the performance and electrical parameters of a PV module:Comparative indoor and outdoor experimental investigation

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Energy and Built Environment 2022年第3期3卷 278-290页

作者： M.A.A.Mamun M.M.Islam M.Hasanuzzaman Jeyraj selvaraj Higher Institution Centre of Excellence(HICoE) UM Power Energy Dedicated Advanced Centre(UMPEDAC)Level 4Wisma R&DUniversity of MalayaJalan Pantai Baharu59990 Kuala LumpurMalaysia

Photovoltaic(PV)system’s performance is significantly affected by its orientation and tilt *** investigation(indoor and outdoor)has been carried out to trace the variation in PV performance and electrical parameters at varying tilt angles in Malaysian *** were two experimental modus:1)varying module tilt under constant irradiation level,2)varying irradiation intensity at the optimum tilt set *** the former scheme,the irradiation level was maintained at 750 W/m^(2),and for the later arrangement,the module tilt angle was varied from 0 o to 80 o by means of a single-axis *** show that under constant irradiation of 750 W/m^(2),every 5 o increase in tilt angle causes a power drop of 2.09 W at indoor and 3.45 W at *** contrast,for the same condition,efficiency decreases by 0.54%for indoor case and by 0.76%at *** the other hand,for every 100 W/m^(2)increase in irradiation,solar cell temperature rises by 7.52℃at indoor and by 5.67℃at *** of module electrical parameters,open-circuit voltage,short-circuit current,maximum power point voltage and maximum power point current drops substantially with increasing tilt angle,whereas fill factor drops rather *** experimental investigation confirms that the optimum tilt angle at Malaysian conditions is 15 o and orienting a PV module this angle will maximize the sun’s energy captured and thereby enhance its performance.

关键词： Photovoltaic Irradiation intensity Tilt angle PV performance Module electrical parameters