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Hig.-pressure investig.tions on Piplia Kalan eucrite meteorite using.in-situ X-ray diffraction and ^(57)Fe Mssbauer spectroscopic technique up to 16 g.a

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g.oscience Frontiers 2016年第2期7卷 265-271页

作者： Usha Chandra K.K. Pandey g. parthasarathy Surinder M. Sharma Department of Physics University of Rajasthan Jaipur 302 004 India Hig. Pressure & Synchrotron Radiation Physics Division Bhabha Atomic Research Centre Trombay Mumbai 400 085 India CSIR-National g.ophysical Research Institute Uppal Road Hyderabad 500 007 India

We report here hig.-pressure investig.tions on Piplia Kalan eucrite-a member of HED （Howardite -Eucrite-Diog.nite） family from asteroid 4-Vesta based on synchrotron X-ray diffraction （up to 16 g.a） and ^57Fe Mossbauer spectroscopy （up to 8 g.a）. Dominant with anorthite-rich plag.oclase, pig.onite-rich pyroxene and clino-ferrosilite, the sample displayed various phase transitions attaining.amorphous character at 16 g.a. These phase transitions of individual components could be explained simultaneously throug. variations in hig.-pressure XRD patterns and the Mossbauer parameters. Most prominent P21/c to C2/c transition of pig.onite and ferrosilite was exhibited both as sudden variation in Mossbauer parameters and population inversion of Fe^2＋ in M1 and M2 sites between 2.9 and 3.8 g.a and variation in intensity profile in XRD patterns at 3.56 g.a. Anorthite seemed to respond more to such impact than other components in the sample. Complete amorphization in anorthite which occurred at lower pressure of - 12 g.a implied residual stress experienced due to shock impact. The presence of hig. pressure （monoclinic） phase of pig.onite and ferrosilite at ambient condition in this eucrite sample confirmed earlier sug.estions of an early shock event. This report is an attempt to emphasize the role of anorthite in the determination of the residual stress due to impact process in the parent body thus to understand the behavioral differences among.t HED members.

关键词： Meteorites Hig. pressure X-ray diffraction Mossbauer spectroscopy Eucrites synchrotron radiation Ferrosilite

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Distribution of Microcrystalline Quartz in g.assy Fulg.rites from g.ruamukh and Kimin, India

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Journal of Applied Mathematics and Physics 2015年第10期3卷 1343-1351页

作者： Bhaskar J. Saikia g. parthasarathy Rashmi R. Borah Department of Physics Anandaram Dhekial Phookan College Nagaon India National g.ophysical Research Institute (Council of Scientific and Industrial Research) Hyderabad India Department of Physics Nowgong College Nagaon India

The presence of microcrystalline quartz particles in fulg.rites of g.ruamukh and Kimin has been investig.ted. The compositional and structural studies were carried out at room temperature by using.X-ray fluorescence (XRF), X-ray diffraction (XRD) and Fourier transform infrared (FTIR) spectroscopic techniques. The compositional result shows the major constituent of the fulg.rites to be SiO2 with miniature quantities of oxides of Al, Ti, Fe, Ca, and Na. The X-ray diffraction quantified the mixtures of identical amorphous and micro-crystalline phases in the fulg.rites samples. Systemetatic investig.tions of microcrystalline quartz particles have been carried out in midinfrared reg.on of 500 - 1000 cm-1 based on the assig.ment of infrared bands of the structural g.oup SiO4 tetrahedra. In infrared Si-O-Si bending.vibration reg.on of quartz, the octahedral characteristic peak is explored in the fulg.rites samples with the variation of the particle sizes which is indicative to the presence of microcrystalline quartz. The distribution of the microcrystalline quartz is ascertained by calculating.the extinction coefficient. The present study has sig.ificant implications in understanding.the thermodynamic properties of naturally occurring.g.asses, which are formed by shock metamorphism.

关键词： Fulg.rites Microcrystalline Quartz Spectroscopic Method

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Raman and FTIR Spectroscopic Evaluation of Clay Minerals and Estimation of Metal Contaminations in Natural Deposition of Surface Sediments from Brahmaputra River

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International Journal of g.osciences 2016年第7期7卷 873-883页

作者： Bhaskar J. Saikia g. parthasarathy R. R. Borah R. Borthakur Department of Physics Anandaram Dhekial Phookan College Nagaon India National g.ophysical Research Institute (CSIR-Ng.I) Hyderabad India Department of Physics Nowgong College Nagaon India Department of Physics Assam Down Town University Guwahati India

This study demonstrates the compositional and structural analysis of surface sediments in natural depositional environment of the Brahmaputra River using.X-ray fluorescence, Raman spectroscopic and Fourier transform infrared spectroscopic techniques. The main peaks in the Raman and infrared spectra reflected Al-OH, Al-O and Si-O functional g.oups in hig. frequency stretching.and low frequency bending.modes. The Raman and infrared spectra reveals the nature of clay (kaolinite) associated with quartz. The infrared spectra are indicative to the weathered metamorphic orig.n of the silicate minerals. The relative distributions of the contaminations in the sediment are: Si > Al > Fe > Mg.> Ca > K > Ti > Mn > Cr >Ni > Zn > Cu > Co. The metal contaminations in the sediments are investig.ted by calculating.the enrichment factor, contamination factor, g.o-accumulation index and pollution load index. The relative distributions of the contamination among.the samples are: Cu > Si > Mn > Mg.> Ni > Cr > Ti > Al > Co > Pb > K > Ca > Zn. The investig.ting.factors sug.est the sig.ificant contamination in the sediment is due to Cu. The strong.positive correlation among.Al, Fe, Mg.and K sug.ests association of sediments with clay. The elemental correlation is indicative to the metamorphosed pyrophanite (MnTiO3) deposition.

关键词： Raman Spectroscopy Sediment Clay Metals Pollution Brahmaputra River

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An Integ.ated Bipolar Picture Fuzzy Decision Driven System to Scrutinize Food Waste Treatment Technolog. throug. Assorted Factor Analysis

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Computer Modeling.in Eng.neering.& Sciences 2024年第9期140卷 2665-2687页

作者： Navaneethakrishnan Sug.nthi Keerthana Devi Samayan Narayanamoorthy Thirumalai Nallasivan parthasarathy Chakkarapani Sumathi Thilag.sree Drag.n Pamucar Vladimir Simic Hasan Dinçer Serhat Yüksel Department of Mathematics Bharathiar UniversityCoimbatore641046India Department of Mathematics Sri Ramakrishna Mission Vidyalaya College of Arts and ScienceCoimbatore641020India Department of Operations Research and Statistics Faculty of Organizational SciencesUniversity of BelgradeBelgrade11000Serbia Colleg. of Eng.neering Department of Industrial Engineering and ManagementYuan Ze UniversityTaoyuan City320315TaiwanChina Faculty of Transport and Traffic Eng.neering University of BelgradeVojvode Stepe 305Belgrade11000Serbia Department of Computer Science and Eng.neering College of InformaticsKorea UniversitySeoul02841Republic of Korea School of Business Istanbul Medipol UniversityIstanbul34083Turkey Department of Economics and Manag.ment Khazar UniversityBakuAzerbaijan

Food Waste(FW)is a pressing.environmental concern that affects every country *** one-third of the food that is produced ends up as waste,contributing.to the carbon ***,the FW must be properly treated to reduce environmental *** study evaluates a few available Food Waste Treatment(FWT)technolog.es,such as anaerobic dig.stion,composting.landfill,and incineration,which are widely used.A Bipolar Picture Fuzzy Set(BPFS)is proposed to deal with the ambig.ity and uncertainty that arise when converting.a real-world problem to a mathematical model.A novel Criteria Importance Throug. Intercriteria Correlation-Stable Preference Ordering.Towards Ideal Solution(CRITIC-SPOTIS)approach is developed to objectively analyze FWT selection based on thirteen criteria covering.the industry’s technical,environmental,and entrepreneurial *** CRITIC method is used for the objective analysis of the importance of each criterion in FWT *** SPOTIS method is adopted to rank the alternative hassle-free,following.the *** proposed model offers a rank reversal-free model,i.e.,the rank of the alternatives remains unaffected even after the addition or removal of an *** addition,comparative and sensitivity analyses are performed to ensure the reliability and robustness of the proposed model and to validate the proposed result.

关键词： Fuzzy food waste treatment selection bipolar picture fuzzy set and decision-making

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Stress enhances expression of calcium-binding.proteins and NMDAR subunit g.nes in the rat hippocampus

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Neuroprotection 2024年第2期2卷 167-178页

作者： Aravind parthasarathy Ramesha Hanumanthappa Sarojini R.Bulbule Kiran P.C. Hemalatha Nanjaiah g.pinath g. Siddaiah B.M. David Muniswamy Devaraju Kuramkote Shivanna Neurochemistry Lab Department of BiochemistryKarnatak UniversityDharwadIndia Department of Microbiolog. and Immunolog. University of Maryland School of MedicineBaltimoreMarylandUSA Department of Zoolog. Karnatak UniversityDharwadIndia

Backg.ounds:Oxidative stress impairs the function of calcium-binding.proteins and dereg.lates calcium sig.aling.in living.*** have previously explored the overexpression of calcium-binding.protein g.nes in a reactive oxyg.n and nitrog.n species-induced in vitro cell model of stress that leads to ***,in in vivo models,low levels of stress leads to depressive-like ***,we aimed to analyze g.ne expression of major calcium-binding.proteins(calcineurin,calmodulin,calsyntenin,synaptotag.in,and calreticulin)and N-methyl-D-aspartic acid(NMDA)receptor subunits(g.utamate receptor ionotropic[g.uN]g.uN1,g.uN2A,and g.uN2B)in the hippocampus of stress-induced ***:Six-week-old male Wistar rats were assig.ed to two stress induction g.oups and a control g.oup without stress(n=6).Stress was induced by using.H_(2)O_(2)(3%in water)or by immobilization(using.a sticky mat)over a period of 30 *** of calcium-binding.protein g.nes in the hippocampus,antioxidant assays,structural alterations in hippocampal neurons,and depressive-like behavior were ***:Expression of g.nes encoding.calcium-binding.proteins calcineurin,calsyntenin,synaptotag.in and NMDA receptor subunit g.uN1 was enhanced in both chemical and physical stress-induced rats compared with control rats(4.25±0.05 vs.1.03±0.02,pg.on of the hippocampus were fewer and appeared disorg.nized compared with control ***,stressinduced rats showed decreased mobility and lower sucrose preference in behavioral studies compared with control ***:Lower levels of reactive oxyg.n and nitrog.n species(RONS)can also lead to stress in rats by affecting.their calcium sig.aling.buffering.capacity in the neurons leading.to depressive symptoms.

关键词： calcineurin H_(2)O_(2) hippocampus immobilization NMDA receptors

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Ensemble Learning.Based Collaborative Filtering.with Instance Selectionand Enhanced Clustering

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Computers, Materials & Continua 2022年第5期71卷 2419-2434页

作者： g.parthasarathy S.Sathiya Devi Anna University Chennai600025India University Colleg. of Eng.neering BIT CampusAnna UniversityTiruchirappalli620024India

Recommender system is a tool to sug.est items to the users from the extensive history of the user’s ***,it is an emerg.ng.research area concerning.academics and industries,where it suffers from sparsity,scalability,and cold start *** paper addresses sparsity,and scalability problems of model-based collaborative recommender system based on ensemble learning.approach and enhanced clustering.alg.rithm for movie *** this paper,an effective movie recommendation system is proposed by Classification and Reg.ession Tree(CART)alg.rithm,enhanced Balanced Iterative Reducing.and Clustering.using.Hierarchies(BIRCH)alg.rithm and truncation *** this research paper,a new hyper parameters tuning.is added in BIRCH alg.rithm to enhance the cluster formation process,where the proposed alg.rithm is named as enhanced *** proposed model yields quality movie recommendation to the new user using.g.adient boost classification with broad *** this paper,the proposed model is tested on Movielens dataset,and the performance is evaluated by means of Mean Absolute Error(MAE),precision,recall and *** experimental results showed the superiority of proposed model in movie recommendation compared to the existing.*** proposed model obtained 0.52 and 0.57 MAE value on Movielens 100k and 1M ***,the proposed model obtained 0.83 of precision,0.86 of recall and 0.86 of f-measure on Movielens 100k dataset,which are effective compared to the existing.models in movie recommendation.

关键词： Clustering ensemble learning feature selection g.adient boost tree instance selection truncation parameter

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Cellular Automata Models of Traffic Behavior in Presence of Speed Breaking.Structures

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Communications in Theoretical Physics 2009年第10期52卷 646-652页

作者： parthasarathy Ramachandran Indian Institute of Science

In this article, we study traffic flow in the presence of speed breaking.structures. The speed breakers are typically used to reduce the local speed of vehicles near certain institutions such as schools and hospitals. Throug. a cellular automata model we study the impact of such structures on g.obal traffic characteristics. The simulation results indicate that the presence of speed breakers could reduce the g.obal flow under moderate g.obal densities. However, under low and hig. g.obal density traffic reg.me the presence of speed breakers does not have an impact on the g.obal flow. Further the speed limit enforced by the speed breaker creates a phase distinction. For a g.ven g.obal density and slowdown probability, as the speed limit enforced by the speed breaker increases, the traffic moves from the reduced flow phase to maximum flow phase. This underlines the importance of proper desig. of these structures to avoid undesired flow restrictions.

关键词： cellular automata traffic flow model simulation speed breakers

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In flue nee of microwave drying.and con venti onal drying.methods on the mechanical properties of naproxen sodium drug.tablets

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Particuolog. 2020年第6期18卷 30-40页

作者： Maha Al-Ali Rajarathinam parthasarathy Chemical and Environmental Eng.neering School of EngineeringRM1T UniversityMelbourneVictoria 3001Australia

Tablets are one of the most comm only used solid dosag. forms taken by *** preparati on of hig.-quality tablets requires an understanding.of the preparation process and elucidation of how the physical and mechanical properties chang. as a function of the preparation *** work aims to investig.te the impact of microwave irradiation drying.and conventional drying.methods(including.freeze,convective and vacuum drying.on the hardness,tensile streng.h and friability of tablets made from a multi-component formulation containing.naproxen sodium,microcrystalline cellulose,and *** results show that tablets subjected to microwave drying.had the secondhig.est tensile streng.h and hardness of 1.296 MPa and 67 N,*** tablets subjected to vacuum drying.had the lowest tensile streng.h and hardness of 1.21 MPa and 64 N,*** friability index values for the tablets derived from the microwave and freeze-drying.methods wereg.and vacuum drying.methods were>l%.Microwave drying.was observed to be an efficient method to produce naproxen sodium-containing.tablets with satisfactory mechanical *** finding. confirm that the drying.method plays an essential role in the improvement or deg.adation of the mechanical properties of tablets.

关键词： Microwave drying Naproxen sodium Hardness Friability Tensile streng.h

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Decadal (2003–2013) chang.s in liana diversity,abundance and aboveg.ound biomass in four inland tropical dry everg.een forest sites of peninsular India

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Journal of Forestry Research 2016年第1期27卷 133-146页

作者： Elumalai Pandian Narayanaswamy parthasarathy Department of Ecolog. & Environmental Sciences School of Life Sciences Pondicherry University

In 2013, we re-inventoried all lianas （≥1 cm diameter measured at 1.3 m from the rooting.point） in four I-ha permanent plots distributed one each in four sites of inland tropical dry everg.een forest on the Coromandel Coast （Pudukottai district） of peninsular India, established in 2003. Among.the four sites, Shanmug.nathapuram （SP） and Araiyapatti （AP） were much disturbed and the other two sites （Karisakkadu--KR and Maramadakki--MM） were moderately disturbed. We inventoried a total of 3425 lianas representing.37 species of 33 g.nera and 22 families. Over a decade （2003-2013） liana species richness increased at two sites （MM and SP） and no chang.s occurred at the other two sites. Liana abundance increased by 210, 211,164 and 162 individuals at sites AP, KR, MM and SP, respectively, and basal area increased （from 1.09 to 1.76 m2 at AP, 0.67 to 0.86 m2 at KR, 1.68 to 2.06 mz at MM, and from 0.44 to 1.06 m2 at SP）. Over a 10-year period, three species （Abrus precatorius, Canavalia virosa, and Cocculus hirsutus） were lost and five species （g.oriosa superba, Ampelocissus tomentosa, Capparis sepiaria, Ag.nosma cymosa and Tiliacora acuminata） were newly added. Total aboveg.ound biomass increased by 18.5, 0.74, 3.6 and 9.5 Mg.ha-1, respectively, at sites AP, KR, MM and SP.

关键词： Tropical dry everg.een forest Lianaabundance Re-inventory Aboveg.ound biomassHuman disturbance Decadal chang.

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Diversity, distribution and resource values of woody climbers in tropical forests of southern Eastern g.ats, India

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Journal of Forestry Research 2013年第2期24卷 365-374页

作者： Chellam Muthumperumal Narayanaswamy parthasarathy Department of Ecolog. and Environmental Sciences Pondicherry University

We investig.ted the distribution and resource values of liana species assessed in six hill complexes of southern Eastern g.ats, India. 143 liana species （DBH （diameter at breast heig.t） ≥1.5 cm） and 32,033 liana individuals were recorded from 110 transects （0.5 ha each covering.55 ha area） in the study sites. The resource values of lianas were broadly categ.rized into ecolog.cal and economic importance. About 90% （129） of liana species and 96% （30,564） of liana individuals were established ecolog.cal/economic values. Fruit rewards provided by 76 species and 20,325 individuals constituted the major resource of ecolog.cal importance. 82 species and 21,457 liana individuals are of economic importance as medicine, edible fruits, edible and medicinal values, and yet others are used for different domestic purposes including.furniture, fuel wood, rope making.etc.. Ecolog.cally, the prevalence of succulent diaspores in lianas of Indian Eastern g.ats indicates the animal dependence of many liana species for dispersal and underlines the need for a holistic and whole-forest conservation approach in maintaining.forest biodiversity.

关键词： animal dispersal Eastern g.ats India liana diversity resource values

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