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Influence of cerium ions on structure-dependent magnetic properties of Ba-Sr M-type hexaferrite nanocrystals

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Journal of Rare Earths 2024年第2期42卷 364-372,I0005页

作者： Ram A.Pawar sunil M.Patange P.M.Dighe Sher Singh Meena Abdullah GAl-Sehemi Mehboobali Pannipara Santosh S.Jadhav Department of Physics ArtsCommerce and Science CollegeAhmednagar413711MaharashtraIndia Department of Physics Shri Krishna MahavidyalayaGunjotiDistOsmanabad413606MaharashtraIndia Padmashri Vikhe patil College of Arts Science and CommercePravaranagarA/P.Loni(Kd)Tal.RahataDistAhmednagar413713MaharashtraIndia Solid State Physics Division Bhabha Atomic Research CentreMumbai400085MaharashtraIndia Department of Chemistry King Khalid UniversityAbha61413Saudi Arabia Department of Physics D.S.M's ArtsCommerce and Science CollegeJintur431509MaharashtraIndia

The present study is a systematic effort to investigate the structure-sensitive magnetic parameters of Ce^(3+) substituted Ba-Sr hexaferrite nanocrystals chemically formulated as Ba_(0.5)Sr_(0.5)Ce_(x)Fe_(12-x)O_(19) where x=0.0-0.2 with Δx=*** hexaferrite powders were prepared using the sol-gel self-ignition route and structurally characterized by means of powder X-ray diffraction and Fourier transform infrared *** creation of the M-type hexaferrite phase within the synthesized samples was revealed from the Rietveld refinement of the X-ray *** occurrence of a secondary phase of CeO_(2) was revealed within the hexaferrites for the substitution,x> *** refined X-ray diffraction data were utilized to compute the lattice parameters,X-ray density,and lattice parameter *** crystal structure plotted from the refined XRD data reveals the occupancy of the ions at different lattice *** XPS data of the hexaferrite were analyzed to confirm the oxidation states of the constituent *** nanocrystalline nature of the hexaferrites was revealed from the crystallite sizes calculated using Scherer's *** analysis of FTIR spectra confirms that only a fraction of Ce^(3+)accommodated in the lattice and the remaining Ce content reside in the form of the CeO_(2) *** morphology of the hexaferrites was analyzed from the FESEM profiles of the ferrite *** magnetic behavior study was performed by analyzing the Curie temperature,hysteresis loops,and hyperfine interactions by means of susceptibility,V.S.M,and Mossbauer spectroscopy,*** hexaferrites with increasing coercivity,decreasing saturation magnetization,and decreasing Curie temperature are reported in the *** substituted Ce^(3+)ions inhibit the grain growth and create lattice imperfections giving rise to hexaferrites with tuned magnetic parameters suitable for different applications.

关键词： Ba-Sr hexaferrite Ce^(3+)substitution XPS Saturation magnetization Coercivity M?ssbauer spectroscopy

Computer-aided diabetic retinopathy diagnostic model using optimal thresholding merged with neural network

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International Journal of Intelligent Computing and Cybernetics 2020年第3期13卷 283-310页

作者： Ambaji S.Jadhav Pushpa B.patil sunil Biradar Department of Electrical and Electronics B.L.D.E.A’s V.P.Dr.P.G.Halakatti College of Engineering and Technology(Affiliated to Visvesvaraya Technological University)VijayapurIndia Department of Ophthalmology Shri B.M.Patil Medical College and Research Center(Deemed to be University)VijayapurIndia

Purpose-Diabetic retinopathy(DR)is a central root of blindness all over the *** DR is tough to diagnose in starting stages,and the detection procedure might be time-consuming even for qualified ***,intelligent disease detection techniques are extremely acceptable for progress analysis and recognition of various ***,a computer-aided diagnosis scheme based on intelligent learning approaches is intended to propose for diagnosing DR effectively using a benchmark ***/methodology/approach-The proposed DR diagnostic procedure involves four main steps:(1)image pre-processing,(2)blood vessel segmentation,(3)feature extraction,and(4)***,the retinal fundus image is taken for pre-processing with the help of Contrast Limited Adaptive Histogram Equalization(CLAHE)and average *** the next step,the blood vessel segmentation is carried out using a segmentation process with optimized gray-level *** the blood vessels are extracted,feature extraction is done,using Local Binary Pattern(LBP),Texture Energy Measurement(TEM based on Laws of Texture Energy),and two entropy computations-Shanon’s entropy,and Kapur’s *** collected features are subjected to a classifier called Neural Network(NN)with an optimized training *** the gray-level thresholding and NN is enhanced by the Modified Levy Updated-Dragonfly Algorithm(MLU-DA),which operates to maximize the segmentation accuracy and to reduce the error difference between the predicted and actual outcomes of the ***,this classification error can correctly prove the efficiency of the proposed DR detection ***-The overall accuracy of the proposed MLU-DA was 16.6%superior to conventional classifiers,and the precision of the developed MLU-DA was 22%better than LM-NN,16.6%better than PSO-NN,GWO-NN,and ***,it is concluded that the implemented MLU-DA outperformed state-of-the-art algorithms in detecting ***

关键词： Diabetic retinopathy detection Gray-level thresholding Optimal trained neural network Dragon fly algorithm Levy update Performance metrics

亚太地区教育质量保障注册制(APQR)评审研究

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上海教育评估研究 2022年第5期11卷 55-61页

作者：向芝洁张建新 jagannath patil 云南大学高等教育研究院云南昆明650091 印度全国评估与认证委员会印度卡纳塔克邦班加罗尔560002

亚太地区教育质量保障注册制(APQR)作为对教育质量保障机构的一种国际性、非政府、自律性的约束和规制活动,在评估质量保障方面起到了重要作用。根据8家教育质量保障机构对APQR评审满意度的分析,发现APQR评审符合“第四代评估理论”的... 详细信息

亚太地区教育质量保障注册制(APQR)作为对教育质量保障机构的一种国际性、非政府、自律性的约束和规制活动,在评估质量保障方面起到了重要作用。根据8家教育质量保障机构对APQR评审满意度的分析,发现APQR评审符合“第四代评估理论”的理念。从评审依据来看,APQR是建构主义的动态化评审;从评审重点来看,APQR重点审视质量保障机构开放、包容以及公信力三大方面;从评审结果来看,APQR灵活运用四个等级来进行综合判断。APQR具有可供借鉴的评审经验,但仍存在需要改进之处以更好实现可持续发展。

关键词：亚太地区教育质量保障注册制元评估教育质量保障可持续发展评估

Genetic Diversity and Population Structure in Landraces and Improved Rice Varieties from India

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Rice science 2015年第3期22卷 99-107页

作者： Shailesh D.KUMBHAR Pawan L.KULWAL jagannath V.patil Chandrakant D.SARAWATE Anil P.GAIKWAD Ashok S.JADHAV State Level Biotechnology Centre Mahatma Phule Agricultural University Agricultural Research Station Directorate of Sorghum Research

A set of 50 rice genotypes comprising landraces, local selections, and improved varieties were characterized using simple sequence repeat（SSR） and inter simple sequence repeat（ISSR） markers to study genetic diversity and population structure. Following unweighted pair group method with arithmetic mean based clustering using binary data of polymorphic markers, the genotypes were grouped into 5 clusters and 11 sub-clusters, whereas population structure analysis separated 50 rice genotypes into 5 sub-populations. Grouping of rice genotypes showed better resemblance with the pedigree information of the genotypes. Both genetic diversity and population structure analysis separated majority of the improved varieties from landraces and local selections. Some of the SSR markers amplified unique alleles which were specific to a particular genotype and could distinguish them from the rest. The results indicate that these rice genotypes exhibit a higher genetic diversity and can be very useful in rice improvement program.

关键词： rice genetic diversity molecular marker population structure simple sequence repeat

Novel one-pot synthesis of 4H-chromene derivatives using amino functionalized silica gel catalyst

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Chinese Chemical Letters 2014年第3期25卷 455-458页

作者： Vijaykumar M.Joshi Rupali L.Magar Prashant B.Throat sunil U.Tekale Bhagavan R.patil Mangal P.Kale Rajendra P.Pawar Department of Chemistry Karmveer Ramraoji Aher ArtsScience and Commerce College Department of Chemistry Deogiri College Department of Chemistry Dnyanopasak College Department of Chemistry Sharda Mahavidyalaya

A simple, efficient, and environmentally benign method for the synthesis of 4H-chromene derivatives was developed using well ordered and recoverable amino functionalized silica gel as a base catalyst. The 4H-chromene derivatives were obtained in short time and excellent yield （87%-96%） by three component reaction of aldehydes, malononitrile and cyclic 1,3-diketones in water at 70 ℃.

关键词： Aldehydes4H-ChromenesAmino functionalized silica gel

谁来保证高等教育质量保障机构的质量?——亚太地区教育质量保障注册制(APQR)的实践探索

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上海教育评估研究 2016年第2期5卷 47-52页

作者：张建新 jagannath patil 云南大学高等教育研究学院云南昆明650091 印度全国评估与认证委员会

教育质量保障机构(QAA)对高等教育质量起着不可替代的作用,QAA的质量也成为关注的重点。继欧洲高等教育质量保障注册制(EQAR)之后,亚太地区教育质量保障注册制(APQR)成为世界第二家对质量保障机构实施注册制的国际性质量保障组织。本文... 详细信息

教育质量保障机构(QAA)对高等教育质量起着不可替代的作用,QAA的质量也成为关注的重点。继欧洲高等教育质量保障注册制(EQAR)之后,亚太地区教育质量保障注册制(APQR)成为世界第二家对质量保障机构实施注册制的国际性质量保障组织。本文回溯APQR产生的背景及历程,随后从评审标准、评审程序两方面对APQR的实施展开描述,最后总结了首次评审的三个特点。

关键词：亚太地区教育质量保障注册制欧洲高等教育质量保障注册制质量保障机构质量标签

Effect of Time of Planting on Cane Yield and Quality Characters in Sweet Sorghum

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Journal of Sustainable Bioenergy Systems 2012年第1期2卷 1-9页

作者： Chamarthy Venkata Ratnavathi Sivanuri Ravi Kumar Bathula Swaroop Vijay Kumar Dasari Gopala Krishna jagannath Vishnu patil Directorate of Sorghum Research (Formerly National Research Centre for Sorghum) Hyderabad India

Sweet sorghum unlike grain sorghum has potential to accumulate sugars in stalks similar to sugarcane. Short duration and lower water requirements of sweet sorghum are other advantages over sugarcane. Sorghum is usually grown in kharif and rabi seasons. As an energy crop, industry demands supply of green cane as raw material through out the year. Hence this agronomic study was conducted to determine suitable time of planting of sweet sorghum under the agro climatic conditions prevailing in India, so that continuous supply of raw material is assured for factory operations through out the year, especially during the lean period of sugarcane crushing. Various physical and chemical characters of plant and stem juice were studied by taking up bimonthly plantings at four locations using 12 genotypes of sweet sorghum in the first year and quarterly plantings at four locations using 10 genotypes (8 genotypes common in both years) in the second year. Of the six plantings, planting during August and April were found to be not suitable for good sweet sorghum yields, therefore, in the second year, four plantings were taken up i.e., June, October, December and February at six locations. The various attributes selected for observations include cane yield, percent brix of stem juice, percent juice extractability, percent total soluble sugars and reducing sugars in the stem juice. Highest green cane yield and percent juice extractability was observed in June planting in all genotypes followed by February, and December in both bimonthly and quarterly plantings. Juice extraction percentage was also highest in June plantings followed by October, April and December plantings. June plantings recorded highest percent brix followed by December and February plantings in bimonthly plantings, while in quarterly planting, highest percent brix and total sugars in juice was observed in February planting followed by planting in June.

关键词： Genotypes Date of Planting Biomass Juice Extractability Brix Total Soluble Sugars Reducing Sugars

Synthesis and Electrical Characterization of ZrO2 Thin Films on Si(100)

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Journal of Modern Physics 2012年第1期3卷 69-73页

作者： Vijay Ramkrishna Chinchamalatpure sunil Madhavrao Chore Shikant Sahebrao patil Gajanan Niranjan Chaudhari 不详

The ZrO2 thin films deposited on Si (100) were successfully synthesized by solgel process and deposited by using spin-coating *** structural properties of ZrO2 thin films were investigated by X-Ray Diffraction (XRD), Scanning Electron Microscope (SEM), Fourier Transform Infrared Spectroscopy (FT-IR), and electrical properties were studied by conventional techniques like Capacitance-Voltage (C-V) measurement and Current–Voltage (I–V) measurement. The XRD of ZrO2 films shows the films crystallized and exists in two phases at 700℃ calcinations temperature. The C–V characteristics of all the dielectric films that involved distinct inversion, depletion, and accumulation were clearly revealed in MIS structure. I-V characteristics of ZrO2 thin films on Si shows decreased saturation current on calcinations temperatures. The XPS measurement reveals that a zirconium silicate interfacial layer has formed in the ZrO2/Si Systems.

关键词： Sol-Gel Technique ZrO2 Thin Film C –V I-V

Influence of Thickness on the Photosensing Properties of Chemically Synthesized Copper Sulfide Thin Films

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World Journal of Condensed Matter Physics 2015年第1期5卷 1-9页

作者： Abhiman Dattatray Dhondge sunil Rameshgir Gosavi Narayani Madhukar Gosavi Chatur Pundlik Sawant Amar Maruti patil Abhijeet Ravsaheb Shelke Nishad Gopal Deshpande C. H. C. Arts S. G. P. Commerce and B. B. J. P. Science College Taloda India Government College of Engineering Jalgaon India G. T. patil College Nandurbar India q-SpinTech & Nanomaterials Laboratory Department of Physics Shivaji University Kolhapur India

We report here the influence of thickness on the photosensing properties of copper sulfide (CuS) thin films. The CuS films were deposited onto glass substrate by using a simple and cost effective chemical bath deposition method. The changes in film thickness as a function of time were monitored. The films were characterized using X-ray diffraction technique (XRD), field emission scanning electron microscopy (FE-SEM), optical measurement techniques and electrical measurement. X-ray diffraction results indicate that all the CuS thin films have an orthorhombic (covellite) structure with preferential orientation along (113) direction. The intensity of the diffraction peaks increases as thickness of the film increases. Uniform deposition having nanocrystalline granular morphology distributed over the entire glass substrate was observed through FE-SEM studies. The crystalline and surface properties of the CuS thin films improved with increase in the film thickness. Transmittance (except for 210 nm thick CuS film) together with band gap values was found to decrease with increase in thickness. I-V measurements under dark and illumination condition show that the CuS thin films give a good photoresponse.

关键词： Copper Sulfide (CuS) Chemical Bath Deposition (CBD) Thin Film X-Ray Diffraction (XRD) Field Emission Scanning Electron Microscopy (FESEM) Photosensitivity