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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

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Electrical and dielectric properties of Ni_(0.5)Co_(0.5)Ga_(x)Fe_(1.8-x)O_(4)(x≤1.0)spinel ferrite microspheres

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Journal of Rare Earths 2023年第2期41卷 259-267页

作者： S.Akhtar M.A.Almessiere B.Unal A.Demir Korkmaz Y.Slimani N.Tashkandi A.Baykal A.Ul-Hamid 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 Institute of Forensic Sciences and Legal Medicine Istanbul University-CerrahpasaBuyukcekmece CampusBuyukcekmece-Istanbul34500Turkey Department of Chemistry Istanbul Medeniyet UniversityUskudar/Istanbul34700Turkey Department of Nanomedicine Research Institute for Research and Medical Consultations(IRMC)Imam Abdulrahman Bin Faisal UniversityP.O.Box 1982Dammam31441Saudi Arabia Core Research Facilities King Fahd University of Petroleum&MineralsDhahran13261Saudi Arabia 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

Microspheres of Ni_(0.5)Co_(0.5)Ga_(x)Fe_(2-x)O_(4)(x≤1.0)microsphere spinel ferrites(NiCoGaFe-MSFs)and carbon spheres were prepared via a hydrothermal *** micro structure of microspheres was investigated through scanning and transmission electron microscopy(SEM and TEM),respectively,and X-ray diffraction(XRD).The electrical and dielectric properties of NiCoGaFe-MSF at temperatures ranging from20 to 120℃(between 293,1×10^(3)and 393.1×10^(3))for f≤3.0 MHz were systematically studied as a result of 3D graphical drawing of the data obtained from an impedance *** parameters such as ac/dc conductivity,dielectric loss,dielectric constant,activation energy,dissipation factor and Cole-Cole impedance spectra were extensively evaluated for various Ga ion mole ratios in the substitution where x≤*** notice that the ac conductivity mostly obeys exponential power law rules,which vary significantly with the substitution ratios of Ga *** analyses confirm that differences in conduction mechanisms in NiCoGaFe-MSFs are mainly due to grain-to-grain boundaries related to Ga ion substitution *** change in dielectric constant of NiCoGaFe-MSFs is strongly dependent on the substitution rates and results in a normal dielectric distribution with *** tangential loss for all micro spheres is observed to vary with measured temperatures and their frequency dependencies can be attributed to the conduction mechanism similar to Koop’s phenomenological *** is clearly seen that the formation of semicircles is dominated by all the NiCoGaFe-MSFs and the diameter of the semicircles mostly decreases with increasing temperature,as evidence of a temperaturedependent relaxation mechanism.

关键词： Spinel ferrites Microspheres Electrical properties Ac/dc conductivity Dielectric properties Rare earths

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NiMoO_4纳米颗粒的溶胶-凝胶法合成及其组织、形貌、光学、磁学和光催化性能（英文）

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Transactions of Nonferrous Metals Society of China 2017年第8期27卷 1785-1793页

作者： V.UMAPATHY P.NEERAJA a.manikandan P.RAMU Research and Development Centre Bharathiar UniversityCoimbatoreTamil Nadu 641046India Caplin Point Laboratories Limited Chennai 600017India Department of Chemistry NKR Government Arts College for WomenNamakkalTamil Nadu 637001India Department of Chemistry Bharath Institute of Higher Education and ResearchBharath UniversityChennai 600073India Department of Chemistry Meenakshi Academy of Higher Education and ResearchChennaiTamil Nadu 600078India

采用溶胶-凝胶法合成钼酸镍(NiMoO_4)纳米颗粒。以水作为溶剂使所得产品具有纳米晶结构。使用X射线衍射、能量分散X射线分析(EDX)和傅里叶转换红外光谱等手段对纳米晶进行结构表征。使用扫描电镜和透射电镜对纳米晶颗粒的尺寸大小和形... 详细信息

采用溶胶-凝胶法合成钼酸镍(NiMoO_4)纳米颗粒。以水作为溶剂使所得产品具有纳米晶结构。使用X射线衍射、能量分散X射线分析(EDX)和傅里叶转换红外光谱等手段对纳米晶进行结构表征。使用扫描电镜和透射电镜对纳米晶颗粒的尺寸大小和形貌进行观察。结果表明,所得纳米颗粒和纯度较高,为单相单斜结构。采用紫外-可见漫反射光谱(UV-Vis-DRS)和光致发光测量法研究室温下产品的光学性能。采用振动样品磁强计(VSM)研究样品的磁性能。结果显示,所得样品具有超顺磁行为。考察了NiMnO_4样品的光催化活性。结果显示,添加TiO_2能提高NiMnO_4的光催化活性。测定了催化剂NiMnO_4、TiO_2和NiMoO_4-TiO_2纳米颗粒对4-氯酚(4-CP)的光催化降解行为。光催化降解结果显示,NiMoO_4-TiO_2纳米颗粒的光催化降解效率高于NiMnO_4和TiO_2的。

关键词： NiMnO4 TiO2 纳米结构溶胶-凝胶合成光学性能磁学性能光催化单斜结构

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溶胶-凝胶法制备Bi_2MoO_6纳米光催化剂的结构、形貌和光磁特性（英文）

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Transactions of Nonferrous Metals Society of China 2015年第10期25卷 3271-3278页

作者： V.UMAPATHY a.manikandan S.ARUL ANTONY P.RAMU P.NEERAJA Research and Development Centre Bharathiar University Caplin Point Laboratories Limited Postgraduate and Research Department of Chemistry Presidency College Department of Chemistry Meenakshi Academy of Higher Education and Research Department of Chemistry Adhiyamaan College of Engineering

采用硝酸铋、钼酸铵、柠檬酸和乙基纤维素为原料,通过溶胶-凝胶法制备钼酸铋(Bi_2MoO_6)纳米颗粒。通过X射线衍射(XRD)、傅里叶变换红外光谱(FT-IR)、高分辨扫描电镜(HRSEM)、能谱分析(EDX)、紫外-可见漫散射光谱(DRS)、光致发光光谱(PL... 详细信息

采用硝酸铋、钼酸铵、柠檬酸和乙基纤维素为原料,通过溶胶-凝胶法制备钼酸铋(Bi_2MoO_6)纳米颗粒。通过X射线衍射(XRD)、傅里叶变换红外光谱(FT-IR)、高分辨扫描电镜(HRSEM)、能谱分析(EDX)、紫外-可见漫散射光谱(DRS)、光致发光光谱(PL)和振动样品磁强计(VSM)等手段对制备的粉末结构、形貌、光磁性和光催化性能进行表征。XRD、FT-IR和EDX结果表明,制备的粉末是具有斜方晶结构的纯单相晶体Bi_2MoO_6。HRSEM图像显示,制备的粉末具有很好的纳米颗粒结构。VSM结果显示制备的纳米颗粒具有超顺磁性。Bi_2MoO_6纳米颗粒的光催化活性实验发现TiO2催化剂的添加提高Bi_2MoO_6纳米颗粒的光催化活性。催化剂Bi_2MoO_6、TiO2和混合氧化物催化剂Bi_2MoO_6-TiO2纳米复合材料对4-氯酚的光催化降解(PCD),发现Bi_2MoO_6-TiO2纳米复合材料的PCD效率比纯Bi_2MoO_6和TiO2催化剂的PCD效率高。

关键词： Bi2MoO6 纳米结构溶胶-凝胶合成法光学性能磁性能光催化剂

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Efficiency-Driven Custom Chatbot Development: Unleashing LangChain, RAG, and Performance-Optimized LLM Fusion

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Computers, Materials & Continua 2024年第8期80卷 2423-2442页

作者： S.Vidivelli manikandan Ramachandran A.Dharunbalaji School of Computing SASTRA Deemed UniversityThanjavurTamilnadu613401India

This exploration acquaints a momentous methodology with custom chatbot improvement that focuses on pro-ficiency close by *** accomplish this by joining three key innovations:LangChain,Retrieval Augmented Generation(RAG),and enormous language models(LLMs)tweaked with execution proficient strategies like LoRA and *** takes into consideration fastidious fitting of chatbots to explicit purposes,guaranteeing engaged and important collaborations with ***’s web scratching capacities engage these chatbots to get to a tremendous store of data,empowering them to give exhaustive and enlightening reactions to *** recovered data is then decisively woven into reaction age utilizing LLMs that have been calibrated with an emphasis on execution *** combination approach offers a triple advantage:further developed viability,upgraded client experience,and extended admittance to *** become proficient at taking care of client questions precisely and productively,while instructive and logically pertinent reactions make a more regular and drawing in cooperation for *** last,web scratching enables chatbots to address a more extensive assortment of requests by conceding them admittance to a more extensive information *** digging into the complexities of execution proficient LLM calibrating and underlining the basic job of web-scratched information,this examination offers a critical commitment to propelling custom chatbot plan and *** subsequent chatbots feature the monstrous capability of these advancements in making enlightening,easy to understand,and effective conversational specialists,eventually changing the manner in which clients cooperate with chatbots.

关键词： LangChain retrieval augumental generation(RAG) fine tuning

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快速微波燃烧法制备的Cu-Ni合金纳米粒子结构和磁性能(英文)

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Transactions of Nonferrous Metals Society of China 2014年第5期24卷 1467-1473页

作者： J.ARUL MARY a.manikandan L.JOHN KENNEDY M.BOUOUDINA R.SUNDARAM J.JUDITH VIJAYA Catalysis and Nanomaterials Research Laboratory Department of Chemistry Loyola College Materials Division School of Advanced Sciences Vellore Institute of Technology (VIT) UniversityChennai Campus Department of Physics College of Science University of Bahrain Nanotechnology Centre University of Bahrain Department of Chemistry Presidency College

采用微波燃烧法制备Cu2＋和Ni2＋摩尔比分别为3∶7,4∶6,5∶5,6∶4和7∶3的Cu-Ni合金纳米粒子,采用XRD、HR-SEM、EDX和VSM对所制备的样品进行表征.X射线衍射和能谱分析表明,在样品制备过程中形成了纯合金粉末.样品的平均晶粒尺寸为21.56... 详细信息

采用微波燃烧法制备Cu2＋和Ni2＋摩尔比分别为3∶7,4∶6,5∶5,6∶4和7∶3的Cu-Ni合金纳米粒子,采用XRD、HR-SEM、EDX和VSM对所制备的样品进行表征.X射线衍射和能谱分析表明,在样品制备过程中形成了纯合金粉末.样品的平均晶粒尺寸为21.56～33.25 ***-SEM像显示样品具有集群/团簇粒状形态结构.VSM分析结果表明,对于低Ni含量的合金（Cu5Ni5,Cu6Ni4和Cu7Ni3）,样品显示顺磁性,而对于较高Ni含量的合金（Cu3Ni7和Cu4Ni6）,样品呈现铁磁性.

关键词：微波燃烧纳米粒子 Cu-Ni合金磁性能

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Can we predict the incidence of high-grade Clavien-Dindo complications in patients with forgotten encrusted stents undergoing endourologic management?

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Asian Journal of Urology 2024年第1期11卷 99-104页

作者： Praanjal Gupta Ramanitharan manikandan Lalgudi Narayanan Dorairajan Kodakattil Sreenivasan Sreerag Sidhartha Kalra Swapnil Singh Kushwaha Department of Urology Jawaharlal Institute of Postgraduate Medical Education and ResearchPondicherryIndia

Objective:Ureteral stents are customarily inserted to facilitate urinary drainage,but they come with their own glitches of being forgotten and/or encrusted leading to serious *** present study aimed to report the complications in patients with forgotten and encrusted stents according to the Clavien-Dindo system specific to urological procedures and identify the factors leading to high-grade(Clavien-Dindo Grade 4A or above)***:The hospital records of patients with forgotten encrusted double-J stents over a period of 8 years were *** parameters recorded included patient demographics,indwelling time,need for percutaneous nephrostomy,hemodialysis,urine culture,blood culture,total blood counts,serum creatinine,radiologic findings,management techniques,number of surgical interventions,modified Clavien-Dindo complications,follow-up,and mortality,if ***:Forty patients were included in the *** median age was 52(range 6-85)*** the total,25(62.5%)patients had a“significant”stent load;31(77.5%)had renal failure or acute kidney injury on presentation;19(47.5%)patients had sepsis at *** the patients presented with sepsis,11(57.9%)patients demonstrated a positive urine culture;and 7/11(63.6%)patients exhibited pan-resistant *** out of 40(30.0%)patients in our series developed high-grade Clavien-Dindo *** univariate analysis,sepsis at presentation(p=0.007),stent load(p=0.031),diabetes(p=0.023),positive urine culture(p=0.007),and stent indwelling time of more than 1 year(p=0.031)were found to be *** multivariate logistic regression analysis,sepsis at presentation(p=0.017)and positive urine culture(p=0.016)were significant predictors for high-grade ***:It is prudent to identify specific risk factors,namely sepsis at presentation and positive urine culture to triage and optimize these patients before surgical management.

关键词： Forgotten Encrusted stent Outcome Predictor Clavien-Dindo complication

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An in vitro Anti-urolithiasis Activity of a Herbal Formulation:Spinacia oleracea *** Coriandrum sativum L.

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Clinical Complementary Medicine and Pharmacology 2024年第1期4卷 76-84页

作者： Sumathy Raj Monica Shree Gnana Soundara Rajan Suganthi Ramasamy Rimal Isaac Rajamony Suthies Goldy Ramathilaga Ariyamuthu Monisha Sudhagar Sakthivel Gandhi Prakash Shoba.manikandan Gurusamy School of Biotechnology Dr.G.R.Damodaran College of ScienceCoimbatoreTamil NaduIndia Department of Biotechnology Dr.N.G.P Arts and Science CollegeCoimbatoreTamil NaduIndia Department of Nanotechnology Noorul Islam Centre for Higher EducationKumaracoilThuckalayKanyakumari DistrictTamil NaduIndia PG and Research Department of Biochemistry Kongunadu Arts and Science CollegeCoimbatoreTamil NaduIndia Department of Biological and Chemical Engineering Mekelle UniversityMekelleEthipoia Department of Zoology Holy Cross College(Autonomous)NagercoilTamilnaduIndia Department of Pharmaceutical Sciences Tshwane University of TechnologyArcadia CampusPretoriaSouth Africa

Background:Hard mineral and acid salt deposits that clump together in concentrated urine are known as kidney stones.A complicated chain of physicochemical events,including hyper saturation,nucleation,growth,aggrega-tion,and retention in the urinary tract,leads to urolithiasis,the third most prevalent urinary tract *** traditional medications and therapies are less successful in treating urolithiasis and frequently cause ***:The present study is focused on evaluating the anti-urolithiasis activities of the polyherbal formulation prepared from Spinacia oleracea *** Coriandrum sativum ***:To evaluating the anti-urolithiasis activities of the polyherbal formulation prepared from *** and *** seeds against oxalate crystals by employing an in vitro inhibition,aggregation,and nucleation assay,employing a spectrophotometer followed by microscopic observation,and further monitored by egg semiperme-able membrane model,using cystone as a standard ***:In the present work,the alkaloids,glycosides,flavonoids,glycosides,phenols,saponins,steroids,tannins,terpenoids,and triterpenoids were found in the extracts of *** and *** in vitro assays in the present study clearly indicated that all the mixture extracts readily prevented crystal nucleation,growth and *** aqueous extract of the mixture inhibited significant inhibitory potential against the crystallization ***:It can be said that the phyto-constituents enriched homemade preparation possibly will be used as a medication for the management of kidney stones by dissolving the oxalate stone in the kidney.

关键词： Urolithiasis Polyherbal Egg membrane Spinacia oleracea Coriandrum sativum

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An improved evaporation rate water cycle algorithm for energy-efficient routing protocol in WSNs

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International Journal of Intelligent Computing and Cybernetics 2023年第1期16卷 30-45页

作者： Vimala Dayalan manikandan Kuppusamy School of Computer Science and Engineering Vellore Institute of TechnologyVelloreIndia

Purpose-The paper aims to introduce an efficient routing algorithm for wireless sensor networks(WSNs).It proposes an improved evaporation rate water cycle(improved ER-WC)algorithm and outlining the systems performance in improving the energy efficiency of *** proposed technique mainly analyzes the clustering problem of WSNs when huge tasks are ***/methodology/approach-This proposed improved ER-WC algorithm is used for analyzing various factors such as network cluster-head(CH)energy,CH location and CH density in improved *** proposed study will solve the energy efficiency and improve network throughput in ***-This proposed work provides optimal clustering method for Fuzzy C-means(FCM)where efficiency is improved in *** evaluations are conducted to find network lifespan,network throughput,total network residual energy and network *** limitations/implications-The proposed improved ER-WC algorithm has some implications when different energy levels of node are used in *** implications-This research work analyzes the nodes’energy and throughput by selecting correct CHs in intra-cluster *** can possibly analyze the factors such as CH location,network CH energy and CH ***/value-This proposed research work proves to be performing better for improving the network throughput and increases energy efficiency for WSNs.

关键词： WSNs Improved ER-WCA Energy efficiency Routing protocol PCM Fuzzy C-Means Paper type Research paper

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Provisioning Intelligent Water Wave Optimization Approach for Underwater Acoustic Wireless Sensor Networks

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Computer Systems Science & Engineering 2022年第11期43卷 625-641页

作者： M.manikandan A.Rajiv Kannan Department of Computer Science and Engineering Vidhyaa Vikas College of Engineering and TechnologyTiruchengodeNamakkalTamilnaduIndia Department of Computer Science and Engineering KSR College of Engineering(Autonomous)TiruchengodeNamakkalTamilnaduIndia

In the Acoustics channel,it is incredibly challenging to offer data transfer for time-sourced applications in an energy-efficient manner due to higher error rate and propagation ***,conventional re-transmission over any failure generally initiates significantly larger end-to-end delay,and therefore it is not probable for time-based ***,standard techniques without any re-transmission consume enormous *** investigation proposes a novel multi-hop energy-aware transmission-based intelligent water wave optimization *** ensures reduced end-to-end while attaining potential amongst overall energy efficiency end-to-end packet *** merges a naturally inspired meta-heuristic approach with multi-hop routing for data packets to reach the *** appropriate design of this Meta heuristic-based energy-aware scheme consumes lesser energy than the conventional one-hop transmission strategy without ***,there is no hop-by-hop re-transmission *** proposed model shows only lesser delay than conventional methods with *** work facilitates extensive work to carry out the proposed model performance with the MATLAB simulation *** results illustrate that the model is exceptionally energyefficient with lesser packet *** 500 nodes,the packet delivery ratio of proposed model is 100%,average delay is reduced by 2%,total energy consumption is 8 J,average packet redundancy is 1.856,and idle energy is *** proposed model outperforms existing approaches like OSF,AOR,and DMR respectively.

关键词： Acoustic applications energy efficiency network communications underwater sensor networks meta-heuristic approach intelligent water wave optimization

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