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Novel design and composition optimization of self-lubricating functionally graded cemented tungsten carbide cutting tool material for dry machining

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Advances in Manufacturing 2021年第1期9卷 34-46页

作者： Rityuj Singh parihar Raj kumar Sahu Srinivasu Gangi Setti Department of Mechanical Engineering National Institute of Technology RaipurRaipurIndia

The functionally graded cemented tungsten carbide (FGCC) is a suitable material choice for cutting tool applications due to balanced hardness and fracture *** presence of cobalt and CaF2 composition gradient in FGCC may enhance mechanical as well as antifriction ***,structural design of selflubricating FGCC was proposed using Power law composition gradient model and thermal residual stresses (TRSs) as a key ***,*** and *** model was adopted for estimation of TRS,and optimum composition gradient was identified at Power law exponent n =*** designed material displayed compressive and tensile TRS at surface and core respectively;subsequently fabricated by spark plasma sintering and characterized via scanning electron microscope (SEM),indentation *** agreement between experimental and analytical values of TRS demonstrated the effectiveness of intended design model in the composition optimization of self-lubricating *** work will be helpful in implementation of dry machining for clean and green manufacturing.

关键词： Functionally graded cemented tungsten carbide(FGCC) Thermal residual stress(TRS) Solid lubricant Power law

Next-Generation Intelligent MXene-Based Electrochemical Aptasensors for Point-of-Care Cancer Diagnostics

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Nano-Micro Letters 2022年第6期14卷 248-281页

作者： Arpana parihar Ayushi Singhal Neeraj kumar Raju Khan MohdAkram Khan Avanish KSrivastava Industrial Waste Utilization Nano and BiomaterialsCSIR-Advanced Materials and Processes Research Institute(AMPRI)Hoshangabad RoadBhopal 462026MPIndia Academy of Scientific and Innovative Research(AcSIR) Ghaziabad 201002India

Delayed diagnosis of cancer using conventional diagnostic modalities needs to be addressed to reduce the mortality rate of ***,2 D nanomaterial-enabled advanced biosensors have shown potential towards the early diagnosis of *** high surface area,surface functional groups availability,and excellent electrical conductivity of MXene make it the 2 D material of choice for the fabrication of advanced electrochemical biosensors for disease ***-enabled electrochemical aptasensors have shown great promise for the detection of cancer biomarkers with a femtomolar limit of ***,the stability,ease of synthesis,good reproducibility,and high specificity offered by MXene-enabled aptasensors hold promise to be the mainstream diagnostic *** this review,the design and fabrication of MXene-based electrochemical aptasensors for the detection of cancer biomarkers have been ***,various synthetic processes and useful properties of MXenes which can be tuned and optimized easily and efficiently to fabricate sensitive biosensors have been ***,futuristic sensing applications along with challenges will be deliberated herein.

关键词： MXene Electrochemical devices POCT Aptamer Cancer diagnostics

Hunting of hunted:an ensemble modeling approach to evaluate suitable habitats for caracals in India

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Ecological Processes 2022年第1期11卷 744-757页

作者： Ashish kumar Jangid Chandra Prakash Singh Jai Singh parihar Jasbir Singh Chauhan Rajnish kumar Singh Prakash kumar Verma Amritanshu Singh Shantanu Sharma Shekhar Kolipaka Wildlife Institute of India DehradunUttarakhand 248001India Space Applications Centre Indian Space Research OrganisationAhmedabadGujarat 380015India Madhya Pradesh State Forest Department Madhya Pradesh Tiger Foundation SocietyKuno National ParkBhopalMadhya Pradesh 462001India Leo Foundation WageningenThe Netherlands

Background:Large-scale hunting and various anthropogenic pressures in the recent past have pushed the Asiatic caracal(Caracal caracal schmitzi),an elusive medium-sized and locally threatened felid species towards local extinction in *** widely distributed historically,it has been sparsely reported from several regions of central and northern states in India till twentieth ***,the species distribution became confined only to the states of Rajasthan,Gujarat and Madhya Pradesh,which have had reported sightings in the twenty-first *** order to highlight the potentially suitable habitats for Asiatic caracals in India,we targeted forth-filtering of the spatial model ensemble by creating and utilizing the validated and spatially thinned species presence information(n=69)and related ecological variables(aridity,NDVI,precipitation seasonality,temperature seasonality,terrain ruggedness),filtered with anthropological variable(nightlight).Results:Out of eight spatial prediction models,the two most parsimonious models,Random Forest(AUC 0.91)and MaxEnt(AUC 0.89)were weighted and *** ensemble model indicated several clustered habitats,covering 1207.83 km^(2)areas in Kachchh(Gujarat),Aravalli mountains(Rajasthan),Malwa plateau(Rajasthan and Madhya Pradesh),and Bundelkhand region(Madhya Pradesh)as potentially suitable habitats for *** probabilities of pixels were further regressed with converted vegetation height data within selected highly potential habitats,i.e.,Ranthambore Kuno Landscape(RKL)(suitability~0.44+0.03(vegetation height)^(**),R^(2)=0.27).The regression model inferred a significant positive relation between vegetation height and habitat suitability,hence the lowest ordinal class out of three classes of converted vegetation height was masked out from the RKL,which yielded in an area of 567 km^(2) as potentially highly suitable habitats for caracals,which can be further proposed as survey areas and conservation priority are

关键词： Medium-sized cat Caracal caracal schmitzi Potentially suitable habitat Drylands Potential survey area

Phytochemistry and ethnomedicinal qualities of metabolites from Phyllanthus emblica L.:A review

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BIOCELL 2023年第5期47卷 1159-1176页

作者： VIJAY kumar PRAVEEN C.RAMAMURTHY SIMRANJEET SINGH DALJEET SINGH DHANJAL PARUL parihar DEEPIKA BHATIA RAM PRASAD JOGINDER SINGH Central Ayurveda Research Institute JhansiUttar Pradesh284003India Interdisciplinary Centre for Water Research Indian Institute of SciencesBangalore560012India Department of Biotechnology Lovely Professional UniversityPhagwaraPunjab144411India Department of Botany Lovely Professional UniversityPhagwaraPunjab144411India Department of Biotechnology Baba Farid CollegeBathindaPunjab151001India Department of Botany Mahatma Gandhi Central UniversityMotihari845401India Department of Microbiology Lovely Professional UniversityPhagwaraPunjab144411India

Phyllanthus emblica or Indian gooseberry is an integrated part of Ayurvedic and Traditional Chinese *** several decades,the well-known ancient herb has been extensively utilized in traditional medicine to cure diseases like fever,diabetes,constipation,jaundice,ulcers,biliousness,anemia,anorexia,and *** the traditional system,Indian gooseberry has various ethnomedicinal *** the Ayurvedic system,different methods of administration(anupan)have shown different ethnomedicinal properties of Indian *** well-known chemical components in Indian gooseberry have been identified through phytochemical evaluation,among which the flavonoids and phenols are most *** the toxicity perspective,it is considered a safe herb in India,and is taken as a food supplement in European *** wide-spectrum pharmacological activities of the crude extracts and isolates of Indian gooseberry are attributed to the predominance of phenols and ***,it is important to study the exact mechanism of the activity of the phytochemicals in Indian gooseberry,especially in anti-cancer *** of Indian gooseberry enhances proliferation in several cancer cells in vitro,including stem cells like ovarian cancer(OC)cells,and also has been observed to possess anti-proliferative characteristics in *** review intends to explore the therapeutic potential of Indian gooseberry based on scientific reports and attempts to find the gaps for future research.

关键词： Phyllanthus emblica Amla Vitamin C Antioxidant Stem cells Phytochemistry Pharmacology

Chemoselective Dehydrogenation of 3-[2-(3,4-Dihydro-1-naphthalenyl)ethyl]imidazolidine-2,4-diones: a New and Convenient Synthesis of 13,16-Diazaequilenin analogs

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Chinese Journal of Chemistry 2004年第10期22卷 1196-1199页

作者： parihar J.A RAMANA M.M.V Department of Chemistry University of Mumbai Santacruz (E) Mumbai-400098 IndiaDepartment of Chemistry University of Mumbai Santacruz (E) Mumbai-400098 India

The synthesis of the title compounds starting with the chemoselective dehydrogenation of 3-[2-(3,4-dihydro-1-naphthalenyl)ethyl]imidazolidine-2,4-diones has been described.

关键词： chemoselective dehydrogenation imide reduction intramolecular cyclization 13,16-diazasteroid

Application of source biasing technique for energy efficient DECODER circuit design: memory array application

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Journal of Semiconductors 2018年第4期39卷 49-54页

作者： Neha Gupta Priyanka parihar Vaibhav Neema Department of Electronics and Telecommunication Engineering Institute of Engineering and Technology Devi Ahilya University

Researchers have proposed many circuit techniques to reduce leakage power dissipation in memory cells. If we want to reduce the overall power in the memory system, we have to work on the input circuitry of memory architecture i.e. row and column decoder. In this research work, low leakage power with a high speed row and column decoder for memory array application is designed and four new techniques are proposed. In this work, the comparison of cluster DECODER, body bias DECODER, source bias DECODER, and source coupling DE- CODER are designed and analyzed for memory array application. Simulation is performed for the comparative analysis of different DECODER design parameters at 180 nm GPDK technology file using the CADENCE tool. Simulation results show that the proposed source bias DECODER circuit technique decreases the leakage current by 99.92% and static energy by 99.92% at a supply voltage of 1.2 V. The proposed circuit also improves dynamic power dissipation by 5.69%, dynamic PDP/EDP 65.03% and delay 57.25% at 1.2 V supply voltage.

关键词： SRAM leakage current delay SLEEP transistor

Variable stars in M37

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Research in Astronomy and Astrophysics 2018年第12期18卷 111-122页

作者： Ajaz Ahmad Dar Padmakar Singh parihar Parvej Saleh Manzoor Ahmad Malik Department of Physics University of KashmirHazratbal 190006Srinagar-J&KIndia Department of Physics Islamia College of Science and CommerceHawalSrinagar-19002J&KIndia Indian Institute of Astrophysics Koramagala-560034BangaloreIndia Applied Sciences Department GowhatiUniversity of AssamIndia

The CCD photometric observations of open star cluster M37(NGC 2099) were carried out up to a limiting magnitude of V ～ 20 in both B and V filters to search for variable stars using a 2k×4k CCD and the 1.3 m telescope at the Vainu Bapu Observatory, Kavalur.A total of 314 stars were in the first observing run, out of which 60 were identified as *** out of the identified 60 variables are classified as W UMa binary *** model fitting, we used PHOEBE based on the W-D code to estimate the physical parameters of these newly detected W UMa binaries that theoretically best match the observed light curves.

关键词： techniques:photometric astronomical instrumentation methods and techniques astrometry and celestial mechanics (stars:) binaries:eclipsing

Long-Term Conservation Agriculture and Intensified Cropping Systems:Effects on Growth,Yield,Water,and Energy-use Efficiency of Maize in Northwestern India

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Pedosphere 2018年第6期28卷 952-963页

作者： Chiter M.parihar Malu R.YADAV Shankar L.JAT Aditya K.SINGH Bhupender kumar Vijay POONIYA Sanatan PRADHAN Rakesh K.VERMA Mangi L.JAT Raj K.JAT Muli D.parihar Hari S.NAYAK Yashpal S.SAHARAWAT Indian Council of Agricultural Research-Indian Institute of Maize Research New Delhi 110012(India) Indian Council of Agricultural Research-Indian Agricultural Research Institute New Delhi 110012(India) International Maize and Wheat Improvement Center New Delhi 110012(India) Borlaug Institute for South Asia Samastipur 848125(India) Chaudhary Charan Singh Haryana Agricultural University Hisar 125004(India) International Center for Agricultural Research in the Dry Areas Kabul 11082010(Afghanistan)

Conservation agriculture(CA)-based best-bet crop management practices may increase crop and water productivity, while conserving and sustaining natural resources. We evaluated the performance of rainy season maize during 2014 under an ongoing long-term trial(established in 2008) with three tillage practices, i.e., permanent bed(PB), zero tillage(ZT), and conventional tillage(CT) as main plots, and four intensified maize-based cropping systems, i.e., maize-wheat-mungbean, maize-chickpea-Sesbania(MCS), maizemustard-mungbean, and maize-maize-Sesbania) as subplot treatments. In the seventh rainy season of the experiment, maize growth parameters, yield attributes, yield, and water-and energy-use efficiency were highest at fixed plots under ZT. Maize growth parameters were significantly(P < 0.05) superior under ZT and PB compared with CT. Maize yield attributes, including cobs per m^2(7.8), cob length(0.183 m), grain rows per cob(13.8), and grains per row(35.6), were significantly higher under ZT than CT; however, no significant effect of cropping systems was found on maize growth and yield attributes. Zero tillage exhibited the highest maize productivity(4 589 kg ha^(-1)). However, among the cropping systems, MCS exhibited the highest maize productivity(4 582 kg ha^(-1)). In maize, water use was reduced by 80.2–120.9 mm ha-1under ZT and PB compared with CT, which ultimately enhanced the economic water-use efficiency by 42.0% and 36.6%, respectively. The ZT and PB showed a 3.5%–31.8% increase in soil organic carbon(SOC) at different soil depths(0–0.45 m), and a 32.3%–39.9% increase in energy productivity compared with CT. Overall, our results showed that CA-based ZT and PB practices coupled with diversified maize-based cropping systems effectively enhanced maize yield and SOC,as well as water-and energy-use efficiency, in northwestern India.

关键词： conventional tillage economic water-use efficiency permanent bed rainy season soil organic carbon zero tillage

Binary star detection in the open cluster King 1 field

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Research in Astronomy and Astrophysics 2020年第3期20卷 185-191页

作者： Parvej Reja Saleh Debasish Hazarika Ajaz Ahmad Dar Padmakar Singh parihar Eeshankur Saikia Department of Applied Sciences Gauhati University-781014AssamIndia Department of Physics University of Kashmir-190006Srinagar-J&KIndia Indian Institute of Astrophysics Koramagala-560034BangaloreIndia

A rarely studied open cluster,King 1 is observed using the 1.3-m telescope equipped with a 2 k×4 k CCD at Vainu Bappu Observatory,*** analyze the photometric data obtained from CCD observations in both B and V *** of 132 detected stars in the open cluster King 1 field,we have identified four stellar variables,and two among them are reported as newly detected binary *** parallax values from Gaia DR2 suggest that the open cluster King 1 is in the background of these two detected binary systems,falling along the same line of sight,giving rise to different parallax *** analysis was carried out using Phase Dispersion Minimization(PDM)and the Lomb-Scargle(LS)method for all the detected *** Of Eclipsing Binari Es(PHOEBE)is extensively employed to model various stellar parameters of both the detected binary *** on the modeling results obtained from this work,one of the binary systems is reported for the first time as an Eclipsing Detached(ED)and the other as an Eclipsing Contact(EC)binary of W-type W UMa.

关键词： galaxies photometry-galaxies clusters individual(King 1)-(stars:)binaries eclipsing-methods observational