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Ferroelectric composite-based piezoelectric energy harvester for selfpowered detection of obstructive sleep

Journal of Materiomics 2023年第4期9卷 609-617页

作者： Swati Panda Hyoju Shin Sugato Hajra Yumi Oh Wonjeong Oh Jeonghyeon Lee P.M.Rajaitha Basanta Kumar Panigrahi jyoti shukla Alok Kumar Sahu Perumal Alagarsamy Hoe Joon Kim Department of Robotics and Mechatronics Engineering Daegu Gyeongbuk Institute of Science and Technology(DGIST)Daegu42988South Korea Department of Electrical Engineering Siksha‘O’Anusandhan UniversityBhubaneswar751030India Department of Electrical Engineering Poornima College of EngineeringJaipur303903India Department of Physics Indian Institute of Technology-GuwahatiAssam781039India Robotics and Mechatronics Research Center Daegu Gyeongbuk Institute of Science and Technology(DGIST)Daegu42988South Korea

Lead-free piezoelectric ceramic is a promising material for energy harvesters,as they have superior electromechanical,ferroelectric,and piezoelectric *** addition,piezoelectric ceramics can be blended with polymer to achieve high-flexibility polymer-ceramic composites,providing mechanical robustness and *** this context,a new lead-free ferroelectric material,having the chemical formula SrTi_(2)O_(5)(STO),was synthesized using a high-temperature solid-state *** analyses of the structural,morphological,and electrical properties of the synthesized material were *** crystallizes with orthorhombic symmetry and space group of *** frequency and temperature-dependent dielectric parameters were evaluated,and impedance spectroscopy shed light on the charge *** PDMS-STO composites at different mass fraction of the STO were prepared using a solvent casting route,and a corresponding piezoelectric nanogenerator(PENG)was *** electrical output of the different PENG by varying massfractions of STO in PDMS and varying force were *** 15%(in mass)PENG device delivered the highest peak-to-peak voltage,current,and power density of 25 V,92 nA,and 0.64 mW@500 MU,*** biomechanical energy harvesting using the PENG device by daily human motions,bending of the device,and attaching the device to laboratory equipment was *** the PENG device was attached to the human throat region,and snoring signals were recorded.A classification model was designed employing the convolutional neural network(CNN)*** have been laid to differentiate between normal and abnormal snores,which could help the patient with screening and early disease detection,contributing to self-powered healthcare applications.

关键词： Lead-free Ferroelectric Nanogenerator Sleepdisorder

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Study of plasma parameters of coaxial plasma source using triple Langmuir probe and Faraday cup diagnostics

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Plasma Science and Technology 2024年第4期26卷 94-100页

作者： Sunil KANCHI Rohit shukla Archana SHARMA Pulsed Power and Electromagnetics Division Bhabha Atomic Research CentreVisakhapatnam 531011India Homi Bhabha National Institute Mumbai 400085India Beam Technology Development Group Bhabha Atomic Research CentreMumbai 400085India

Coaxial plasma guns are a type of plasma source that produces plasma which propagates radially and axially controlled by the shape of the ground electrode, which has attracted much interest in several applications. In this work, a 120° opening angle of CPG nozzle is used as a plasma gun configuration that operates at the energy of 150 J. The ionization of polyethylene insulator between the electrodes of the gun produces a cloud of hydrogen and carbon *** triple Langmuir probe and Faraday cup are used to measure plasma density and plasma temperature. These methods are used to measure the on-axis and off-axis plasma divergence of the coaxial plasma gun. The peak values of ion densities measured at a distance of 25 mm on-axis from the plasma gun are(1.6±0.5)×10^(19)m^(-3)and(2.8±0.6)×10^(19)m^(-3)for hydrogen and carbon plasma respectively and the peak temperature is 3.02±0.5 eV. The mean propagation velocity of plasma is calculated using the transit times of plasma at different distances from the plasma gun and is found to be 4.54±0.25 cm/μs and 1.81±0.18 cm/μs for hydrogen and carbon plasma respectively. The Debye radius is obtained from the measured experimental data that satisfies the thin sheath approximation. The shot-to-shot stability of plasma parameters facilitates the use of plasma guns in laboratory experiments. These types of plasma sources can be used in many applications like plasma opening switches, plasma devices, and as plasma sources.

关键词： coaxial plasma source triple Langmuir probe Faraday cup plasma density plasma temperature

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Numerical Analysis of Phase Change and Container Materials for Thermal Energy Storage in the Storage Tank of Solar Water Heating System

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Journal of Thermal Science 2024年第2期33卷 408-421页

作者： SINGH Shailendra ANAND Abhishek shukla Amritanshu SHARMA Atul Non-Conventional Energy Laboratory Rajiv Gandhi Institute of Petroleum TechnologyJais Amethi229304India

This study evaluates the effectiveness of phase change materials(PCMs) inside a storage tank of warm water for solar water heating(SWH) system through the theoretical simulation based on the experimental model of *** et *** model is explained by five fundamental equations for the calculation of various parameters like the effectiveness of PCMs,the mass of hot water,total heat content,and duration of *** study simulated eleven PCMs to analyze their effectiveness like Sodium hydrogen phosphate dodecahydrate(SHPD),OM 37,N-Eicosane(NE),Lauric acid(LA),Paraffin wax(PW),OM 48,Paraffin wax C_(20-33)(PW-C20-33),Sodium acetate trihydrate(SAT),Palmitic acid(PA),Myristic acid(MA),and Stearic acid(SA).Among all PCMs,the SHPD has found the highest value of effectiveness factor of ***,it is the most recommended PCM for the storage tank of the SWH *** study also includes the melt fraction analysis of all enumerated PCMs corresponding to container materials of stainless steel,glass,aluminum mixed,tin,aluminum,and *** melt fraction analysis is performed by making a coding program in the FORTRAN programming *** the analysis,copper container material is found to have high melting rate for all PCMs so it is superior to other container materials.

关键词： theoretical model solar water heating system phase change material effectiveness factor melt fraction

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Phase structures and critical behavior of rational non-linear electrodynamics Anti de Sitter black holes in Rastall gravity

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Communications in Theoretical Physics 2024年第4期76卷 134-152页

作者： Yassine Sekhmani Dhruba jyoti Gogoi Ratbay Myrzakulov Javlon Rayimbaev Ratbay Myrzakulov Eurasian International Centre for Theoretical Physics Astana 010009Kazakhstan L.N.Gumilyov Eurasian National University Astana 010008Kazakhstan Department of Physics Moran CollegeMoranhatCharaideo 785670AssamIndia Theoretical Physics Division Centre for Atmospheric StudiesDibrugarh UniversityDibrugarh 786004AssamIndia New Uzbekistan University Movarounnahr Str.1Tashkent 100000Uzbekistan University of Tashkent for Applied Sciences Gavhar Str.1Tashkent 100149Uzbekistan National University of Uzbekistan Tashkent 100174Uzbekistan

This research paper presents a black hole solution with a rational nonlinear electrodynamics source within the Rastall gravity *** paper analyzes the thermodynamic properties of the solution in normal phase space and explores its critical *** phase structure is examined using the extended first law of thermodynamics,with the cosmological constantΛserving as pressure *** isotherms exhibit van der Waals behavior at small values of horizon r_(+).The paper also investigates the Gibbs free energy behavior and finds two critical points with two pressures where the re-entrant phase transition occurs and *** also explore the prevalent microstructure of black holes in Ruppeiner geometry,uncovering significant deviations in the nature of particle interactions from conventional ***,the thermodynamic geometry is analyzed using the Ruppeiner formalism,with the normalized Ricci scalar indicating possible point-phase transitions of the heat capacity,and the normalized extrinsic curvature having the same sign as the normalized Ricci *** three-phase transitions of the heat capacity are those that we find for the normalized Ruppeiner ***,there is an absolute correspondence.

关键词： Rastall gravity biack hole Phase structures

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Iron supplementation during malaria infection in pregnancy and childhood:A review

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Asian Pacific Journal of Tropical Medicine 2024年第1期17卷 12-20页

作者： Neha Surela Amrendra Chaudhary Poonam Kataria jyoti Das National Institute of Malaria Research Sector-8DwarkaNew Delhi-110077India

Malaria presents a significant global public health challenge,with severe malarial anaemia being a primary manifestation of the *** understanding of anaemia caused by malaria remains incomplete,making the treatment more *** is a crucial micronutrient essential for haemoglobin synthesis,oxygen delivery,and other vital metabolic functions in the *** is indispensable for the growth of human beings,as well as bacteria,protozoa,and viruses in vitro and in *** deficiency is among the most common nutritional deficiencies and can have detrimental effects during developmental stages of ***-induced iron deficiency occurs due to the hemolysis of erythrocytes and the suppression of erythropoiesis,leading to *** iron requirements is particularly critical during pivotal life stages such as pregnancy,infancy,and *** intake alone may not suffice to meet adequate iron requirements,thus highlighting the vital role of iron *** iron supplementation can alleviate iron deficiency,it can exacerbate malaria infection by providing additional iron for the ***,in the context of pregnancy and childhood,iron supplementation combined with malaria prevention and treatment has been shown to be beneficial in improving birth outcomes and ensuring proper growth and development,*** review aims to identify the role and impact of iron supplementation in malaria infection during the life stages of pregnancy and childhood.

关键词： Iron supplementation Malaria Pregnancy Childhood

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Seismic evaluation of frequency influence and resonant behavior for lead rubber bearing isolated rigid rectangular liquid tanks

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Earthquake Engineering and Engineering Vibration 2024年第4期23卷 973-994页

作者： jyoti Ranjan Barik Kishore Chandra Biswal Department of Civil Engineering National Institute of Technology RourkelaOdisha 769008India

The seismic behavior of a partially filled rigid rectangular liquid tank is investigated under short-and longduration ground motions.A finite element model is developed to analyze the liquid domain by using four-noded quadrilateral *** competency of the model is verified with the available *** studies are conducted for the dynamic parameters of the base-isolated tank,using a lead rubber bearing to evaluate the optimum damping and time period of the *** application of base isolation has reduced the total and impulsive hydrodynamic components of pressure by 80 to 90 percent,and base shear by 15 to 95 percent,depending upon the frequency content and duration of the considered *** sloshing amplitude of the base-isolated tank is reduced by 18 to 94 percent for most of the short-duration earthquakes,while it is increased by 17 to 60 percent for the majority of the long-duration ***,resonance studies are carried out through a long-duration harmonic excitation to obtain the dynamic behavior of non-isolated and isolated tanks,using a nonlinear sloshing *** seismic responses of the base-isolated tank are obtained as higher when the excitation frequency matches the fundamental sloshing frequency rather than the isolator frequency.

关键词： lead rubber bearing frequency domain resonant inputs long-duration excitation

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EPASAD:ellipsoid decision boundary based Process-Aware Stealthy Attack Detector

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Cybersecurity 2024年第3期7卷 32-48页

作者： Vikas Maurya Rachit Agarwal Saurabh Kumar Sandeep shukla Department of Computer Science and Engineering Indian Institute of Technology KanpurkanpurIndia Merkle Science BangaloreIndia

Due to the importance of Critical Infrastructure(Cl)in a nation's economy,they have been lucrative targets for cyber *** critical infrastructures are usually Cyber-Physical Systems such as power grids,water,and sewage treatment facilities,oil and gas pipelines,*** recent times,these systems have suffered from cyber attacks numer-ous *** have been developing cyber security solutions for Cls to avoid lasting *** to standard frameworks,cyber security based on identification,protection,detection,response,and recovery are at the core of these *** of an ongoing attack that escapes standard protection such as firewall,anti-virus,and host/network intrusion detection has gained importance as such attacks eventually affect the physical dynamics of the ***,anomaly detection in physical dynamics proves an effective means to implement *** is one example of anomaly detection in the sensor/actuator data,representing such systems physical *** present EPASAD,which improves the detection technique used in PASAD to detect these micro-stealthy attacks,as our experiments show that PASAD's spherical boundary-based detection fails to *** method EPASAD overcomes this by using Ellipsoid boundaries,thereby tightening the boundaries in various dimen-sions,whereas a spherical boundary treats all dimensions *** validate EPASAD using the dataset produced by the TE-process simulator and the C-town *** results show that EPASAD improves PASAD's average recall by 5.8%and 9.5%for the two datasets,respectively.

关键词： Intrusion detection system Critical infrastructure security Industrial control system Machine learning

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Photocatalytic application of magnesium spinel ferrite in wastewater remediation:A review

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Journal of Magnesium and Alloys 2024年第2期12卷 490-505页

作者： Rohit Jasrotia Nikhil Jaswal jyoti Prakash Chan Choon Kit Jagpreet Singh Abhishek Kandwal School of Physics and Materials Science Shoolini UniversityBajholSolanH.P.India Himalayan Centre of Excellence in Nanotechnology Shoolini UniversityBajholH.P.India INTI International University Putra NilaiNegeri SembilanMalaysia Department of Chemistry University Centre for Research&Development Chandigarh UniversityMohali140413PunjabIndia Shenzhen Institute of Advanced Technology Chinese Academy of SciencesChina

This review paper explores the efficacy of magnesium ferrite-based catalysts in photocatalytic degradation of organic contaminates(antibiotic and dyes).We report the influence of different doping strategies,synthesis methods,and composite materials on the degradation efficiency of these *** analysis reveals the versatile and promising nature of magnesium ferrite-based catalysts,offering the valuable insights into their practical application for restoring the *** to the smaller band gap and magnetic nature of magnesium ferrite,it holds the benefit of utilising the broader spectrum of light while also being *** in-depth analysis of magnesium ferrites'photocatalytic mechanism could lead to the development of cheap and reliable photocatalyst for the wastewater *** concise review offers a thorough summary of the key advancements in this field,highlighting the pivotal role of the magnesium ferrite based photocatalysts in addressing the pressing global issue of organic pollutants in wastewater.

关键词： Magnesium ferrite Wastewater Dyes Antibiotics Photocatalytic degradation

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Gedunin attenuates streptozotocin-induced diabetic hepatopathy in rats

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Asian Pacific Journal of Tropical Biomedicine 2024年第7期14卷 288-297页

作者： Suchismita Mazumdar Thankamani M Marar jyoti M Patki School of Biotechnology and Bioinformatics D.Y.Patil Deemed to be UniversityNavi Mumbai 400614India

Objective:To examine the hepatoprotective effects of gedunin in streptozotocin(STZ)-induced diabetic ***:Rats were divided into 4 groups:control,STZ,gedunin,and STZ+*** parameters for liver function and liver histology were *** molecular interaction of gedunin with the liver glucose transporters GLUT2 and SGLT1 was examined using AutoDock ***:Gedunin attenuated STZ-induced increase in the levels of aspartate transaminase,alanine transaminase,alkaline phosphatase,lactate dehydrogenase and gamma-glutamyl transferase in the serum and liver tissue,reduced lipid peroxidation,and enhanced antioxidant *** studies showed considerable restoration of liver architecture in gedunin-treated diabetic *** silico studies revealed stable binding of gedunin with GLUT2 and ***:Gedunin exerts hepatoprotective effects in STZ-induced diabetic rats by reducing liver enzymatic activities and oxidative *** studies are warranted to verify the mechanism of its hepatoprotective action.

关键词： Gedunin GLUT2 SGLT1 Diabetic hepatopathy Docking Histology Homology modelling

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Optimization of variables and assessment of in-vitro and in-vivo antihyperlipidemic activity of Eudragit RS nanoparticles containing simvastatin

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Particuology 2024年第7期90卷 189-198页

作者： Bina Gidwani Vishal Jain Veenu Joshi Ravindra Kumar Pandey Shiv Shankar shukla Amber Vyas Columbia Institute of Pharmacy Raipur(C.G.)India University Institute of Pharmacy Pt Ravishankar Shukla UniversityRaipur(C.G.)India Center for Basic Science and Research Pt Ravishankar Shukla UniversityRaipur(C.G.)India

Simvastatin, a BCS class II drug, is associated with poor aqueous solubility, first-pass metabolism and short half-life. In the present work, nanoparticles were prepared and evaluated. Optimization of formulation and process parameters was done through the use of independent and dependent variables. Preliminary studies were done to determine suitable range of the concentration of Eudragit polymer (10%–30%) and the ratio of drug to polymer (1:1 to 1:5) for the formation of nanoparticles by emulsification and a solvent evaporation technique. Results revealed that the mean size of nanoparticles was affected by stirring speed from 5000 RPM, 8000 RPM, and 12000 RPM. The results of increase in association efficiency and percent yield with increase in amount of drug from 100 mg, 150 mg, and 200 mg in selected range were observed. In-vitro release studies showed that two formulations possess highest initial burst and slow sustained drug release. There was 2.93-fold decrease in total cholesterol and 3.27-fold increases in triglyceride level during in-vivo study.

关键词： Simvastatin Eudragit RS 100 Nanoparticles Hyperlipidemia

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