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Dielectric dispersion and thermodynamic behavior of stearic acid binary mixtures with alcohol as co-solvent using time domain reflectometry

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Journal of Advanced Dielectrics 2017年第4期7卷 34-40页

作者： M.Maria Sylvester t.ganesh D.J.S.Anand Karunakaran P.Senthilkumar Praveen G.Hudge A.C.Kumbharkhane PG&Research Department of Physics Bishop Heber CollegeBharthidasan University Tiruchirapalli 620017Tamil NaduIndia PG&Research Department of Physics Rajah Serfoji Government College Bharthidasan University Thanjavur 613005Tamil NaduIndia Department of Physics Saranathan College of Engineering Tiruchirapalli 620012Tamil NaduIndia Department of Physics S.I.C.E.Society's Degree College of Arts Science and CommerceAmbernathThaneMaharashtraIndia School of Physical Sciences Swami Ramanad Teerth Marthwada University NandedMaharashtraIndia

Dielectric permittivity and relaxation dynamics of binary and ternary mixture of stearic acid on various concentration and their thermodynamic effects are *** static dielectric constant(ε_(0)),dielectric permittivity(ε′)and dielectric loss(ε″)are found by bilinear *** relaxation time(τ),dielectric strength(Δε)and the excess permittivity(ε^(E))are *** thermodynamic parameters such as enthalpy(ΔH),entropy(ΔS)and Gibb's free energy(ΔG)are *** significant changes in dielectric parameters are due to the intramolecular and intermolecular interactions in response to the applied *** permittivity spectra of stearic acid–alcohol in the frequency range of 10MHz to 30 GHz have been measured using picoseconds time Domain Reflectometry(tDR).the dielectric parameters(ε_(0),ε′,ε″)are found by bilinear calibration *** of temperature in intermolecular interaction and the relaxation process are also *** Ft-IR spectral analysis reveals that the conformation of functional groups and formation for hydrogen bonding are present in both binary and ternary mixtures of stearic acid.

关键词： tDR dielectric relaxation stearic acid thermodynamic parameters Ft-IR

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Exploring the electromagnetic shielding behavior of lanthanum doped calcium nanoferrites

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Journal of Rare Earths 2024年第11期42卷 2128-2136页

作者： E.Ahilandeswari K.Sakthipandi R.Rajesh Kanna G.Rajkumar B.ganesh Babu S.Arunmetha Aslam Hossain P.Sakthivel V.Rajendran M.Srinidhi Raghavan Department of Physics SRM TRP Engineering College Department of Electronics and Communication Engineering M. Kumarasamy College of Engineering Department of Physics Easwari Engineering College Department of Mechanical Engineering SRM TRP Engineering College Centre for Advanced Energy Studies Department of Electronics and Communication EngineeringKoneru Lakshmaiah Education Foundation Smart Materials Research Institute Southern Federal University Centre for Materials Science Department of PhysicsScience and HumanitiesFaculty of EngineeringKarpagam Academy of Higher Education Centre for Nanotechnology Academy of Maritime Education and Training (Deemed to be University) Department of Chemistry and Centre for Nano-Materials and Displays B.M.S. College of Engineering

the present study focuses on the synthesis and characterization of lanthanum(La3+)-doped calcium nanoferrites(CaLaxFe2-xO4:x=0.025,0.050,0.075 and 0.100) using the sonochemical *** techniques were employed to analyze the effect of La3+infusion,Raman spectroscopy confirms the presence of active A1g,t2gand Egmodes in the CaLaxFe2-xO4nanoferrite,indicating the formation of an active ferrite *** introduction of La3+doping results in a significant increase in the band gap energy,rendering the nanoferrites insulating（3.23-3,57 eV）.At higher frequencies,the impedance studies reveal minimal losses and better AC conductivity,pointing to improved dielectric *** higher frequencies,the Q-factor of La-doped calcium nanoferrites shows lower electromagnetic *** M-H curve exhibits ferromagnetic behavior,with La3+-doped calcium nano ferrites displaying a saturation magnetization ranging from 12.72 to 18.10 emu/*** incorporation of La3+also induces enhanced electrical polarization,leading to notable dielectric loss and increased absorption of electromagnetic ***,these CaLaxFe2-xO4nanoferrites demonstrate potential as effective microwave absorbers across a wide frequency range,with significant shielding absorption observed at 8.8-9.1 GHz.

关键词： Dielectric Magnetism Microwave absorption Nanoferrites Rare earths Structural properties

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the influence of spark plasma sintering temperatures on the microstructure,hardness,and elastic modulus of the nanocrystalline Al-xV alloys produced by high-energy ball milling

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Journal of Materials Science & technology 2022年第27期122卷 68-76页

作者： J.Christudasjustus C.S.Witharamage ganesh Walunj t.Borkar R.K.Gupta Department of Materials Science and Engineering North Carolina State UniversityRaleighNC 27606United States Department of Mechanical Engineering Cleveland State UniversityClevelandOH 44115United States

Al-xV alloys(x=2 at.%,5 at.%,10 at.%)with nanocrystalline structure and high solid solubility of V were produced in powder form by high-energy ball milling(HEBM).the alloy powders were consolidated by spark plasma sintering(SPS)employing a wide range of temperatures ranging from 200 to 400°*** microstructure and solid solubility of V in Al were investigated using X-ray diffraction analysis,scanning electron microscope and transmission electron *** microstructure was influenced by the SPS temperature and V content of the *** alloys exhibited high solid solubility of V–six orders of magnitude higher than that in equilibrium state and grain sizet all the SPS *** formation of Al3V intermetallic was detected at 400℃.Formation of a V-lean phase and bimodal grain size was observed during SPS,which increased with the increase in SPS *** hardness and elastic modulus,measured using nanoindentation,were significantly higher than commercial *** example,Al-V alloy produced by SPS at 200℃ exhibited a hardness of 5.21 GPa along with elastic modulus of 96.21 *** evolution of the microstructure and hardness with SPS temperatures has been discussed.

关键词： Spark plasma sintering Aluminum alloys Nanocrystalline alloys High-energy ball milling Nanoindentation Hardness Elastic modulus

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Numerical simulation and experimental validation of arc welding of DMR-249A steel

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Defence technology（防务技术） 2016年第4期12卷 305-315页

作者： Rishi PAMNANI M. VASUDEVAN t. JAYAKUMAR R VASANtHARAJA K.C. ganesh Prototype training Centre Kalpakkam Tamil Nadu 603 127 India IGCAR Tamil Nadu 603 102 India Metallurgical and Materials Engg Dept NIT Warangal 506 004 India Dept of Mech Engg NITT Tiruchirappalli 620 015 India

the thermo-mechanical attributes of DMR-249 A steel weld joints manufactured by shielded metal arc welding(SMAW) and activated gas tungsten arc welding(A-GtAW) processes were studied using Finite Element Model(FEM) simulation. the thermal gradients and residual stresses were analyzed with SYSWELD software using double ellipsoidal heat source distribution model. the numerically estimated temperature distribution was validated with online temperature measurements using thermocouples. the predicted residual stresses profile across the weld joints was compared with the values experimentally measured using non-destructive techniques. the measured and predicted thermal cycles and residual stress profile was observed to be comparable. the residual stress developed in double sided A-GtAW joint were marginally higher in comparison to five pass SMAW joint due to phase transformation associated with high heat input per weld pass for A-GtAW process. the present investigations suggest the applicability of numerical modeling as an effective approach for predicting the thermo-mechanical properties influenced by welding techniques for DMR-249 A steel weld joints. the tensile, impact and micro-hardness tests were carried to compare the *** benefits of high productivity and savings of labor and cost associated with A-GtAW compared to SMAW process, the minor variation in residual stress build up of A-GtAW joint can be neglected to develop A-GtAW as qualified alternative welding technique for DMR-249 A steel.? 2016 China Ordnance Society. Production and hosting by Elsevier B.V. All rights reserved.

关键词： DMR-249A A-GtAW SMAW FEM SYSWELD thermo-mechanical Simulation

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Comparing acid steatocrit and faecal elastase estimations for use in M-ANNHEIM staging for pancreatitis

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World Journal of Gastroenterology 2017年第12期23卷 2217-2222页

作者： M ganesh Kamath C ganesh Pai Asha Kamath Annamma Kurien Department of Physiology Melaka Manipal Medical CollegeManipal University Department of Gastroenterology and Hepatology Kasturba Medical CollegeManipal University Department of Community Medicine Kasturba Medical CollegeManipal University Department of Pathology Melaka Manipal Medical CollegeManipal University

AIM to compare two tests for exocrine pancreatic function(EPF) for use in M-ANNHEIM staging for pancreatitis. MEtHODS One hundred and ninety four consecutive patients with acute pancreatitis(AP; n = 13), recurrent acute pancreatitis(RAP; n = 65) and chronic pancreatitis(CP; n = 116) were enrolled. EPF was assessed by faecal elastase-1(FE-1) estimation and stool fat excretion by the acid steatocrit method. Patients were classified as per M-ANNHEIM stages separately based on the results of the two tests for comparison. Independent Student's t-test, χ~2 test, Kruskal-Wallis test, Mann-Whitney U test and Mc Nemar's test were used as appropriate. RESULtS Sixty-one(52.5%) patients with CP had steatorrhoea when assessed by the acid steatocrit method; 79 (68.1%) with CP had exocrine insufficiency by the FE-1 test(χ~2 test, P the results of acid steatocrit and FE-1 showed a significant negative correlation(Spearman's rho =-0.376, P tatistically significant difference was seen between the M-ANNHEIM stages as classified separately by acid steatocrit and the FE-1. thirteen(6.7%), 87(44.8%), 89(45.8%) and 5(2.5%) patients were placed in M-ANNHEIM stages 0,?Ⅰ, Ⅱ, and Ⅲ respectively, with the use of acid steatocrit as against 13(6.7%), 85(43.8%), 75(38.6%), and 21(10.8%) respectively by FE-1 in stages 0,?Ⅰ, Ⅱ, and Ⅲ thereby altering the stage in 28(14.4%) patients(P test). CONCLUSION FE-1 estimation performed better than the acid steatocrit test for use in the staging of pancreatitis by the M-ANNHEIM classification since it diagnosed a higher proportion of patients with exocrine insufficiency.

关键词： Chronic pancreatitis Pancreatic function tests Pancreatic elastase Staging Steatorrhoea

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Low Area PRESENt Cryptography in FPGA Using tRNG-PRNG Key Generation

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Computers, Materials & Continua 2021年第8期68卷 1447-1465页

作者： t.Kowsalya R.ganesh Babu B.D.Parameshachari Anand Nayyar Raja Majid Mehmood Department of Electronic and Communication Engineering Muthayammal Engineering CollegeRasipuramNamakkalTamilnaduIndia Department of Electronics and Communication Engineering SRM TRP Engineering CollegeTiruchirappalliTamilnaduIndia Department of telecommunication Engineering GSSS Institute of Engineering and Technology for WomenMysuruIndia Faculty of Information technology Graduate SchoolDuy Tan UniversityDa Nang550000Viet Nam Department of Information and Communication technology School of Electrical and Computer EngineeringXiamen University MalaysiaSepang43900Malaysia

Lightweight Cryptography(LWC)is widely used to provide integrity,secrecy and authentication for the sensitive ***,the LWC is vulnerable to various constraints such as high-power consumption,time consumption,and hardware utilization and susceptible to the malicious *** order to overcome this,a lightweight block cipher namely PRESENt architecture is proposed to provide the security against malicious *** true Random Number Generator-Pseudo Random Number Generator(tRNG-PRNG)based key generation is proposed to generate the unpredictable keys,being highly difficult to predict by the ***,the hardware utilization of PRESENt architecture is optimized using the Dual port Read Only Memory(DROM).the proposed PRESENt-tRNGPRNG architecture supports the 64-bit input with 80-bit of key *** performance of the PRESENt-tRNG-PRNG architecture is evaluated by means of number of slice registers,flip flops,number of slices Look Up table(LUt),number of logical elements,slices,bonded input/output block(IOB),frequency,power and *** input retrieval performances analyzed in this PRESENt-tRNG-PRNG architecture are Peak Signal to Noise Ratio(PSNR),Structural Similarity Index(SSIM)and Mean-Square Error(MSE).the PRESENt-tRNG-PRNG architecture is compared with three different existing PRESENt architectures such as PRESENt On-theFly(PERSENt-OtF),PRESENt Self-test Structure(PRESENt-StS)and PRESENt-Round Keys(PRESENt-RK).the operating frequency of the PRESENt-tRNG-PRNG is 612.208 MHz for Virtex 5,which is high as compared to the PRESENt-RK.

关键词： Dual port read only memory hardware utilization lightweight cryptography malicious attackers present block cipher pseudo random number generator true random number generator

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Analysis of a Cashew Shell and Fly Ash Rich Brake Liner Composite Material

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Fluid Dynamics & Materials Processing 2023年第3期19卷 569-577页

作者： R.Selvam L.ganesh Babu Joji thomas R.Prakash t.Karthikeyan t.Maridurai Department of Mechanical Engineering Saveetha Engineering CollegeChennaiTamilnaduIndia Department of Mechatronics Faculty of EngineeringTishk International UniversityErbilIraq Department of Mechanical Engineering Chouksey Engineering CollegeBilaspurChhattisgarh Department of Mechanical Engineering Saveetha School of EngineeringSIMATSChennaiIndia

Hybrid materials collected from organic and inorganic sources,which are traditionally used as brake lining materials,generally include fly ash,cashew shell powder,phenolic resins,aluminium wool,barites,lime powder,carbon powder and copper *** present research focuses on the specific effects produced by fly ash and aims to provide useful indications for the replacement of asbestos due to the health hazards caused by the related ***,the financial implications related to the use of large-volume use of fly ash,lime stone and cashew shell powder,readily available in most countries in the world,are also *** is shown that many manufacturing and automotive industries,which are currently experiencing difficulties in meeting the increasing demand for brake lining material,may take advantage from the proposed solution.

关键词： Friction coefficient wear composite brake lining binders

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Organic bulk heterojunction enabled with nanocapsules of hydrate vanadium pentaoxide layer for high responsivity self-powered photodetector

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Journal of Semiconductors 2022年第9期43卷 39-45页

作者： Hemraj Dahiya Anupam Agrawal ganesh D.Sharma Abhishek Kumar Singh the LNM Institute of Information technology Department of PhysicsJaipurRajasthan 302031India Bhilai Institute of technology DurgChhattisgarh491001India Rajiv Gandhi Institute of Petroleum technology Department of Electronics EngineeringAmethiU.P.229304India

this article demonstrates the fabrication of organic-based devices using a low-cost solution-processable technique.A blended heterojunction of chlorine substituted 2D-conjugated polymer PBDB-t-2Cl,and PC71BM supported nanocapsules hy-drate vanadium penta oxides(HVO)as hole transport layer(HtL)based photodetector fabricated on an ItO coated glass sub-strate under ambient *** device forms an excellent organic junction diode with a good rectification ratio of~*** device has also shown excellent photodetection properties under photoconductive mode(at reverse bias)and zero bias for green light wavelength.A very high responsivity of~6500 mA/W and high external quantum efficiency(EQE)of 1400%have been reported in the *** proposed organic photodetector exhibits an excellent response and recovery time of~30 and~40 ms,respectively.

关键词： self-powered detector green light sensor HVO PBDB-t-2Cl detector processable solution sensor

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Recent advances in targeting the autotaxin-lysophosphatidate-lipid phosphate phosphatase axis in vivo

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the Journal of Biomedical Research 2016年第4期30卷 272-284页

作者： Matthew G.K. Benesch Xiaoyun tang ganesh Venkatraman Raie t. Bekele David N. Brindley Signal transduction Research Group Department of Biochemistry University of Alberta T6G 2S2 Canada.

Extracellular lysophosphatidate （LPA） is a potent bioactive lipid that signals through six G-protein-coupled receptors. this signaling is required for embryogenesis, tissue repair and remodeling processes. LPA is produced from circulating lysophosphatidylcholine by autotaxin （AtX）, and is degraded outside cells by a family of three enzymes called the lipid phosphate phosphatases （LPPs）. In many pathological conditions, particularly in cancers, LPA concentrations are increased due to high AtX expression and low LPP activity. In cancers, LPA signaling drives tumor growth, angiogenesis, metastasis, resistance to chemotherapy and decreased efficacy of radiotherapy. Hence, targeting the AtX-LPA-LPP axis is an attractive strategy for introducing novel adjuvant therapeutic options. In this review, we will summarize current progress in targeting the AtX-LPA-LPP axis with inhibitors of autotaxin activity, LPA receptor antagonists, LPA monoclonal antibodies, and increasing low LPP expression. Some of these agents are already in clinical trials and have applications beyond cancer, including chronic inflammatory diseases.

关键词： cancer chronic inflammation cytokines monoclonal antibodies wound repair

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A validated stability-indicating LC method for the separation of enantiomer and potential impurities of Linezolid using polar organic mode

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Journal of Pharmaceutical Analysis 2012年第4期2卷 272-278页

作者： t.Satyanarayana Raju O.Vishweshwari Kutty V.ganesh P.Yadagiri Swamy Dr.Reddy's Laboratories Ltd.Active Pharmaceutical Ingredients IPDOBachupallyHyderabad 500072A.PIndia Department of Chemistry University College of EngineeringOsmania University

Although a number of methods are available for evaluating Linezolid and its possible impurities, a common method for separation if its potential impurities, degradants and enantiomer in a single method with good efficiency remain unavailable. With the objective of developing an advanced method with shorter runtimes, a simple, precise, accurate stability-indicating LC method was developed for the determination of purity of Linezolid drug substance and drug products in bulk samples and pharmaceutical dosage forms in the presence of its impurities and degradation products. this method is capable of separating all the related substances of Linezolid along with the chiral impurity. this method can also be used for the estimation of assay of Linezolid in drug substance as well as in drug product. the method was developed using Chiralpak IA (250 mm 4.6 mm, 5 mm) column. A mixture of acetonitrile, ethanol, n-butyl amine and trifluoro acetic acid in 96:4:0.10:0.16 (v/v/v/v) ratio was used as a mobile phase. the eluted compounds were monitored at 254 nm. Linezolid was subjected to the stress conditions of oxidative, acid, base, hydrolytic, thermal and photolytic degradation. the degradation products were well resolved from main peak and its impurities, proving the stability-indicating power of the method. the developed method was validated as per International Conference on Harmonization (ICH) guidelines with respect to specificity, limit of detection, limit of quantification, precision, linearity, accuracy, robustness and system suitability.

关键词： HPLC Linezolid Validation Polar organic mode Stability-indicating

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