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Structural,morphological and magnetic properties of(Ni_(0.5)Co_(0.5))[Ga_(x)Gd_(x)Fe_(2-2x)]O_(4)nanoparticles prepared via sonochemical approach

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Journal of Rare earths 2023年第4期41卷 561-571页

作者： Y.Slimani M.A.Almessiere A.Demir Korkmaz A.Baykal M.A.Gondal H.Güngünes sagar e.shirsath A.Manikandan Department of Biophysics Institute for Research and Medical Consultations(IRMC)Imam Abdulrahman Bin Faisal UniversityP.O.Box 1982Dammam31441Saudi Arabia Department of Physics College of ScienceImam Abdulrahman Bin Faisal UniversityP.O.Box 1982Dammam31441Saudi Arabia Department of Chemistry Istanbul Medeniyet UniversityUskudarIstanbul34700Turkey Department of Nanomedicine Research Institute for Research and Medical Consultations(IRMC)Imam Abdulrahman Bin Faisal UniversityP.O.Box 1982Dammam31441Saudi Arabia Laser Research Group Physics DepartmentIRC-Hydrogen&Energy StorageKing Fahd University of Petroleum&MineralsDhahran31261Saudi Arabia K.A.CARe energy Research and Innovation Center King Fahd University of Petroleum&MineralsDhahran 31261Saudi Arabia Department of Physics Hitit University19030Cevre Yolu BulvarCorumTurkey School of Materials Science and engineering University of New South WalesKensingtonSydneyNSW2052Australia Department of Chemistry Bharath Institute of Higher Education and Research(BIHER)Bharath UniversityChennaiTamil Nadu600073India Center for Catalysis and Renewable energy Bharath Institute of Higher Education and Research(BIHER)ChennaiTamil Nadu600073India

The impact of Ga^(3+)and Gd^(3+)co-substitution on different types of behavior of Ni-Co nanospinel ferrites(NSFs),(Ni_(0.5)Co_(0.5))[Ga_(x)Gd_(x)Fe_(2-2x)]O_(4)(0.000≤x≤0.025),was *** were fabricated through ultrasound *** structure,composition,and spherical morphology of all products were verified by numerous characterization techniques such as X-ray diffraction(XRD),scanning and transmission electron microscopes(SeM and TeM),and selected area electron diffraction(SAeD).Mossbauer spectra are composed of two ferromagnetic sextets and one paramagnetic *** spectra were fitted to extract hyperfine parameters of the doped *** sublattices'hyperfine magnetic field decreases with *** isomer shift values show that the Mossbauer spectra are composed of magnetic Fe^(3+)*** magnetization measurements at variable magnetic field(M-H)were investigated via a vibrating sample magnetometer(VSM)at temperatures(T)from 300 to 10 *** NSFs disclose ferrimagnetic behavior at both 300 and 10 K at which they are soft and hard,*** determined that the remanence magnetization(M_(r)),saturation magnetization(M_(s)),and magneton number(n_(B))decrease with increasing Ga^(3+)and Gd^(3+)ions *** reduction in these values is predominantly recognized to be the impact of cation redistribution and surface spins on tetrahedral(T_(d))and octahedral(O_(h))*** the Ga^(3+)and Gd^(3+)contents increase,the coercivity(H_(c))is also found to decrease.

关键词： Spinel ferrites Rare earth substitution Sonochemical synthesis Mossbauer analysis Magnetic properties

effect of Cation Proportion on the Structural and Magnetic Properties of Ni-Zn Ferrites Nano-Size Particles Prepared By Co-Precipitation Technique

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Chinese Journal of Chemical Physics 2008年第4期21卷 381-386页

作者： Santosh S. Jadhav sagar e. shirsath B. G. Toksha S. J. Shukla K. M. Jadhav DSM College of Arts Commerce and Science Jintur Dist. Parbhani 431509 India Department of Physics Dr. Babasaheb Ambedkar Marathwada University Aurangabad 431005 India Postgraduate and Research Centre of Physics Department of Physics Deogiri College Aurangabad India

Ferrites having general formula Ni1-xZnxFe2O4 with x=0.0, 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, and 0.7 were prepared by wet chemical co-precipitation method. The structural and magnetic properties were studied by means of X-ray diffraction, magnetization, and AC susceptibility measurements. The X-ray analysis confirmed the single-phase formation of the samples. The lattice parameter obtained from XRD data was found to increase with Zn content x. The cation distribution was studied by X-ray intensity ratio calculations. Magnetization results exhibit collinear ferrimagnetic structure for x≤0.4, and which changes to non-collinear for x〉0.4. Curie temperature TC obtained from AC susceptibility data decreases with increasing x.

关键词： Ferrites Magnetization Yafet-Kittel angle Curie temperature

Role of composition and grain size in controlling the structure sensitive magnetic properties of Sm substituted nanocrystalline Co-Zn ferrites

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Journal of Rare earths 2020年第10期38卷 1069-1075,I0002页

作者： Anil B.Mugutkar Shyam K.Gore Umakant B.Tumberphale Vijaykumar V.Jadhav Rajaram S.Mane Sunil M.Patange sagar e.shirsath Santosh S.Jadhav Bahirji Smarak Mahavidyalaya Basmath431512MaharashtraIndia Microwave Research Laboratory N.E.S.Science CollegeNanded431601MaharashtraIndia Dnyanopasak Shikshan Mandal's Arts Commerce and Science CollegeJintur431509MaharashtraIndia Guangdong Technion Israel Institute of TechnologyShantou 515006China Department of Physics Shivaji MahavidyalayaUdgir-413517MaharashtraIndia School of Physical Sciences Swami Ramanand Teerth Marathwada UniversityNanded431606MaharashtraIndia Shri Krishna Mahavidyalaya Gunjoti413613MaharashtraIndia School of Materials Science and engineering University of New South WalesSydney2052NSWAustralia

The nanocrystalline samarium substituted Co-Zn ferrites with chemical formula Co0.7Zn0.3SmyFe2-yO4(where y=0,0.01,0.02,0.03,0.04) were synthesized by sol-gel autocombustion *** analysis of Xray diffractograms(XRD) reveals the formation of cubic spinel *** planes indexed from XRD analyses were confirmed in the selected area electron diffraction(SAeD) image of the *** nature of the particles in the ferrite samples was confirmed by *** morphology was analyzed by scanning electron microscopy(SeM).Magnetic measurements show an increase in the magnetization for x ≤*** decrease in magnetization due to spin canting is observed for x=*** coercivity depends on Sm3+doping concentration,grain size and saturation *** complex permeability of the ferrites was analyzed as the function of frequency and Sm3+composition(y).The real part of complex permeability varies linearly with the grain size.

关键词： Nanocrystalline ferrites Rietveld refinement HRTeM Magnetization Coercivity Permeability

Confidential machine learning on untrusted platforms:a survey

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Cybersecurity 2021年第1期4卷 461-479页

作者： Sharma sagar Chen Keke Northwestern Mutual Data Science Associate Professor Director of Trustworthy and Intelligent Computing Lab Department of Computer Science Marquette University Milwaukee WisconsinUSA HP Inc. USA

With the ever-growing data and the need for developing powerful machine learning models,data owners increasingly depend on various untrusted platforms(e.g.,public clouds,edges,and machine learning service providers)for scalable processing or collaborative ***,sensitive data and models are in danger of unauthorized access,misuse,and privacy compromises.A relatively new body of research confidentially trains machine learning models on protected data to address these *** this survey,we summarize notable studies in this emerging area of *** a unified framework,we highlight the critical challenges and innovations in outsourcing machine learning *** focus on the cryptographic approaches for confidential machine learning(CML),primarily on model training,while also covering other directions such as perturbation-based approaches and CML in the hardware-assisted computing *** discussion will take a holistic way to consider a rich context of the related threat models,security assumptions,design principles,and associated trade-offs amongst data utility,cost,and confidentiality.

关键词： Confidential computing Cryptographic protocols Machine learning

Development of a mixed fruit beverage and pulsed light treatment thereof to obtain a microbially safe and enzymatically stable product

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Food Bioscience 2022年第1期45卷 274-283页

作者： Snehasis Chakraborty sagar Mahale Rishab Dhar Somnath Basak Food engineering and Technology Department Institute of Chemical Technology Matunga(E)Mumbai400019India

A mixed fruit beverage was formulated according to D-optimal mixture design using apple ber juice(X_(1),45-59%v/v)-an underexplored fruit,carambola juice(X_(2),1-20%v/v),and black table grape juice(X3,35-40%v/v).The crisp overall acceptability(COA)from 16 semi-trained panelists and overall hedonic score(OSH)from consumers were *** best formulation was apple ber:carambola:black table grape juices=59.0:3.5:37.5 v/v with COA and OSH values of 3.23(on a scale of 5)and 7.55(on a scale of 9),***,the efficacy of pulsed light(PL)(18-30 W cm^(-2) for 33-167 s;total fluence 600-5000 J cm^(-2))and thermal treatments(90℃ for 1-5 min)were studied on various attributes of the mixed *** beverages processed at 90℃ for 5 min(thermal treatment)and 5000 J cm^(-2)(PL treatment at 30 W cm^(-2) for 167 s)showed no microbial count with a complete enzyme *** thermally pasteurized sample(90℃/5 min)was more brown(browning index=70.15)than the PL pasteurized beverage(browning index=65.98).Interestingly,the PL pasteurized(5000 J cm^(-2))beverage showed 25%,27%,and 19% more vitamin C,antioxidants,and phenolic compounds,respectively,than the thermally pasteurized(90℃/5 min)*** PL-treated beverage had a greater sensory appeal than the thermally treated ***-treatment can be an efficient non-thermal pasteurization treatment for ensuring complete microbial and enzymatic inactivation with maximal retention of nutritional and sensory attributes of the blended beverage.

关键词： D-optimal mixture design Numerical optimization Non-thermal processing Pasteurization Microbial safety enzymatic stability

Management and evaluation of bladder paragangliomas

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Asian Journal of Urology 2022年第1期9卷 94-96页

作者： sagar Patel Judy Hamad Matthew e.Nielsen Steven Johnson System Ringgold Standard Institution University of North CarolinaChapel HillNCUnited States

Dear editor,extraadrenal paragangliomas are tumors composed of neuroendocrine-derived,catecholamine-secreting chromaffin cells inducing hypertension,palpitations,and diaphoresis[1].Although extraadrenal paragangliomas are found in a variety of anatomic sites that normally host paraganglia—from the carotid body to the abdominal paraaortic region—the bladder is an uncommon location for *** paragangliomas represent approximately 6%of extraadrenal paragangliomas and only 0.05%of all bladder tumors[2,3].We present a rare case of primary paraganglioma affecting the bladder dome.

关键词： bladder glioma adrenal

FSe2R:An Improved Collision-Avoidance-based energy efficient Route Selection Protocolin USN

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Computer Systems Science & engineering 2023年第3期44卷 2225-2242页

作者： Prasant Ku.Dash Lopamudra Hota Madhumita Panda N.Z.Jhanjhi Kshira sagar Sahoo Mehedi Masud Department of Computer Science and engineering Sambalpur UniversityOdisha768019India Department of Computer Science and engineering NITRourkelaOdisha769008India Department of Computer Science G.M UniversitySambalpurOdisha768001India School of Computer Science and engineering SCETaylor’s UniversitySubang Jaya47500Malaysia Department of Computer Science and engineering SRM UniversityAmaravatiAndhra Pradesh522502India Department of Computer Science College of Computers and Information TechnologyTaif UniversityTaif21944Saudi Arabia

The 3D Underwater Sensor Network(USNs)has become the most optimistic medium for tracking and monitoring underwater *** and collision are two most critical factors in USNs for both sparse and dense *** to harsh ocean environment,it is a challenge to design a reliable energy efficient with collision free *** in link qualities may cause collision and frequent communication lead to energy loss;that effects the network *** overcome these challenges a novel protocol Forwarder Selection energy efficient Routing(FSe2R)is *** proposal’s key idea is based on computation of node distance from the sink,Residual energy(Re)of each node and Signal to Interference Noise Ratio(SINR).The node distance from sink and Re is computed for reliable forwarder node selection and SINR is used for analysis of *** novel proposal compares with existing protocols like H2AB,DeeP,and e2LR to achieve Quality of Service(QoS)in terms of through-put,packet delivery ratio and energy *** comparative analysis shows that FSe2R gives on an average 30%less energy consumption,24.62%better PDR and 48.31%less end-to-end delay compared to other protocols.

关键词： USN energy efficiency collision avoidance MAC SINR

Recent Progress,Challenges,and Prospects in Two‑Dimensional Photo‑Catalyst Materials and environmental Remediation

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Nano-Micro Letters 2020年第12期12卷 29-105页

作者： Karim Khan Ayesha Khan Tareen Muhammad Aslam Rizwan Ur Rehman sagar Bin Zhang Weichun Huang Asif Mahmood Nasir Mahmood Kishwar Khan Han Zhang Zhongyi Guo School of electrical engineering and Intelligentization Dongguan University of Technology(DGUT)Dongguan 523808GuangdongPeople’s Republic of China Institute of Microscale Optoelectronics Collaborative Innovation Centre for Optoelectronic Science and TechnologyKey Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong ProvinceCollege of Physics and Optoelectronic EngineeringShenzhen Key Laboratory of Micro‑Nano Photonic Information TechnologyGuangdong Laboratory of Artificial Intelligence and Digital Economy(SZ)Shenzhen UniversityShenzhen 518060People’s Republic of China College of Materials Science and engineering Shenzhen UniversityShenzhen 518060People’s Republic of China Government Degree College Paharpur Gomel UniversityDera Ismail KhanK.P.KIslamic Republic of Pakistan School of Materials Science and engineering Jiangxi University of Science and TechnologyJiangxi 341000People’s Republic of China School of Chemical and Bio‑Molecular engineering The University of SydneySydneyNSW 2006Australia School of engineering The Royal Melbourne Institute of Technology(RMIT)UniversityMelbourneVICAustralia Research Laboratory of electronics(RLe) Massachusetts Institute of Technology(MIT)CambridgeMAUSA

The successful photo-catalyst library gives significant information on feature that affects photo-catalytic performance and proposes new *** is considerably significant to form multi-functional photo-catalysts with flexible *** recently,two-dimensional materials(2DMs)gained much attention from researchers,due to their unique thickness-dependent uses,mainly for photo-catalytic,outstanding chemical and physical ***-catalytic water splitting and hydrogen(H2)evolution by plentiful compounds as electron(e−)donors is estimated to participate in constructing clean method for solar *** photocatalysis received much research attention caused by their applications to tackle numerous energy and environmental *** broad review explains progress regarding 2DMs,significance in structure,and catalytic *** will discuss in detail current progresses of approaches for adjusting 2DMs-based photo-catalysts to assess their photo-activity including doping,hetero-structure scheme,and functional formation *** plans,e.g.,doping and sensitization of semiconducting 2DMs,increasing electrical conductance,improving catalytic active sites,strengthening interface coupling in semiconductors(SCs)2DMs,forming nano-structures,building multi-junction nano-composites,increasing photo-stability of SCs,and using combined results of adapted approaches,are summed ***,to further improve 2DMs photo-catalyst properties,hetero-structure design-based 2DMs’photo-catalyst basic mechanism is also reviewed.

关键词： Two-dimensional materials Photo-catalysts H2O2/H2-production Pollutant degradation CO2 reduction

A Resource Management Algorithm for Virtual Machine Migration in Vehicular Cloud Computing

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Computers, Materials & Continua 2021年第5期67卷 2647-2663页

作者： Sohan Kumar Pande Sanjaya Kumar Panda Satyabrata Das Kshira sagar Sahoo Ashish Kr.Luhach N.Z.Jhanjhi Roobaea Alroobaea Sivakumar Sivanesan Veer Surendra Sai University of Technology Burla Burla768018India National Institute of Technology Warangal Warangal506004India VNR Vignana Jyothi Institute of engineering and Technology Hyderabad500090India The Papua New Guinea University of Technology Lae-41PapuaNew Guinea School of Computer Science and engineering Taylor’s UniversitySubang Jaya47500Malaysia Department of Computer Science College of Computers and Information TechnologyTaif UniversityTaif21944Saudi Arabia

In recent years,vehicular cloud computing(VCC)has gained vast attention for providing a variety of services by creating virtual machines(VMs).These VMs use the resources that are present in modern smart *** studies reported that some of these VMs hosted on the vehicles are overloaded,whereas others are *** a circumstance,the energy consumption of overloaded vehicles is drastically *** the other hand,underloaded vehicles are also drawing considerable energy in the underutilized ***,minimizing the energy consumption of the VMs that are hosted by both overloaded and underloaded is a challenging issue in the VCC *** proper and efcient utilization of the vehicle’s resources can reduce energy consumption *** of the solutions is to improve the resource utilization of underloaded vehicles by migrating the over-utilized VMs of overloaded *** the other hand,a large number of VM migrations can lead to wastage of energy and time,which ultimately degrades the performance of the *** paper addresses the issues mentioned above by introducing a resource management algorithm,called resource utilization-aware VM migration(RU-VMM)algorithm,to distribute the loads among the overloaded and underloaded vehicles,such that energy consumption is ***-VMM monitors the trend of resource utilization to select the source and destination vehicles within a predetermined threshold for the process of VM *** ensures that any vehicles’resource utilization should not exceed the threshold before or after the ***-VMM also tries to avoid unnecessary VM migrations between the ***-VMM is extensively simulated and tested using nine *** results are carried out using three performance metrics,namely number of nal source vehicles(nfsv),percentage of successful VM migrations(psvmm)and percentage of dropped VM migrations(pdvmm),and compared with threshold-based algorithm(i.e.,threshold)and

关键词： Resource management virtual machine migration vehicular cloud computing resource utilization source vehicle destination vehicle