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Vibrational Spectroscopy of Stretching and Bending Modes of Nickel Tetraphenyl Porphyrin： an Algebraic Approach

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Chinese Physics Letters 2009年第9期26卷 122-125页

作者： Srinivasa Rao KARUMURI Joydeep CHOUDHURY nirmal kumar SARKAR Ramendu BHATTACHARJEE Department of Physics P.B. Siddhartha College of Arts and Sciences Vijayawada-520010 India Department of Physics Assam (a central) University Silchar- 788011 India Department of Physics Karimganj College Karimganj-788710 India

We calculate the vibrational frequencies of nickel tetraphenyl porphyrin for 36 vibrational bands by using the U（2） algebraic approach. The algebraic parameters in the calculations are accurate with the experimental... 详细信息

关键词： sea surface nonliear interaction numerical method

Application of response surface methodology(RSM) for optimization of leaching parameters for ash reduction from low-grade coal

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International Journal of Mining Science and Technology 2018年第4期28卷 617-625页

作者： Sushanta kumar Behera Himanshu meena Sudipto Chakraborty B.C.Meikap Department of Chemical Engineering Indian Institute of Technology (IIT) Kharagpur Department of Chemical Engineering School of Engineering Howard College University of Kwazulu-Natal (UKZN)

Coal is the world＇s most abundant energy source because of its abundance and relatively low cost. Due to the scarcity in the supply of high-grade coal, it is necessary to use low-.grade coal for fulfilling energy demands of modern civilization. However, due to ItS high ash and moisture content, low-grade coal exerts the substantial impact on their consumption like pyrolysis, liquefaction, gasification and combus- tion process. The present research aimed to develop the efficient technique for the production of clean coal by optimizing the operating parameters with the help of response surface methodology. The effect of three independent variables such as hydrofluoric acid （HF） concentration （10-20% by vo!ume ）,. temper- ature （60-100 ~C）, and time （90-180 min）, for ash reduction from the low-grade coal was Investigated.. A quadratic model was proposed to correlate the independent variables for maximum ash reduction at the optimum process condition by using central composite design （CC.D）method. The study reveals that HF concentration was the most effective parameter for ash reduction in comparison with time and temper- ature. It may be due to the higher F-statistics value for HF concentration, which effects to large extent of ash reduction. The characterization of coal was evaluated by Fourier transform infrared spectroscopy （FTIR） analysis and Field-emission scanning electron microscopy with energy-dispersive X-ray （FESEM- EDX） analysis for confirmation of the ash reduction.

关键词： Low-grade coal Hydrofluoric acid (HF)Leaching Ash reduction Response surface methodology

Proteomic analysis of differentially abundant proteins in the embryo and endosperm of Givotia moluccana (L.) Sreem

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Journal of Forestry Research 2020年第6期31卷 2097-2109页

作者： Durgeshwar Pullaiahgari Rajesh kumar meena Swaroopa Rani Tirupaati Padmaja Gudipalli Department of Plant Sciences School of Life SciencesUniversity of HyderabadHyderabadTelangana 500046India

Proteome analysis of embryo and endosperm of Givotia moluccana,a promising angiosperm tree species was carried out using two-dimensional electrophoresis combined with matrix-assisted laser desorption/ionization time of flight to identify differentially abundant proteins and their possible *** study revealed the presence of 492 protein spots in the embryo and 432 in the endosperm,and the relative abundance of 44 spots varied significantly between the *** the 21 functionally characterized protein spots,14.3%were involved in metabolism and energy,28.6%in protein destination and storage,14.3%in defense and stress and 19%in cell growth and *** embryo-specific protein ATPdependent zinc metalloprotease FtsH is predicted to be involved in chloroplast biogenesis and the endospermspecific protein hydroxyacyl-ACP dehydratase in fatty acid *** results suggested that the seeds have proteins required for germination and for stress responses.

关键词： Proteome Embryo Endosperm Euphorbiaceae Givotia moluccana Forest tree 2-DE

Paget-Schroetter Syndrome

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Chinese Medical Journal 2015年第19期128卷 2694-2695页

作者： Manoj meena Sabarigirivasan Harish Jai Prakash Kewlani Neeraj Gupta Vinay kumar meena Department of Respiratory Medicine Jawaharlal Nehru Medical CollegeAjmerRajasthanIndia Department of General Medicine SMS Medical CollegeJaipurRajasthanIndia

To the Editor：A 40-year-old male working as a manual labor with a history of smoking presented with a swelling in the neck and right upper extremity with the breathlessness since 5 *** swelling in the neck region was acute in onset,pain associated with the generalized swelling in a right upper *** was acute in onset but was not associated with chest *** was no history of cough,fever,trauma and family history of other coagulopathies.

关键词： manual labor history smoking presented

Influence of temperature dependent heat source/sink on transient MHD free convective flow in an infinite rigid impermeable vertical cylinder with chemical reaction

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Propulsion and Power Research 2023年第4期12卷 568-583页

作者： Naveen Dwivedi Ashok kumar Singh nirmal C.Sacheti Department of Mathematics Institute of ScienceBanaras Hindu UniversityVaranasi 221005India Department of Mathematics Sahu Jain CollegeNajibabadAffiliated to M.J.P.Rohilkhand UniversityBareilly 246763India Retired Professor Department of MathematicsCollege of ScienceSultan Qaboos UniversityAl Khod PC 123MuscatSultanate of Oman

It is increasingly apparent that the inclusion of mass transfer aspects,together with certain thermal conditions,in the momentum and energy equations governing MHD flows leads to a numbers of real life *** this in view,we have attempted an exact analysis of heat and mass transfer aspects in transient hydromagnetic free convective flow of an incompressible viscous fluid through a vertical pipe under an externally applied magnetic field,assuming presence of chemical reaction and heat source/*** governing PDEs,which simplify to a set of 3 linear ODEs in the physical set up considered here,have been solved using Laplace transform technique,with solutions for key physical variables presented in the term of Bessel and modified Bessel *** influence of governing non-dimensional parameters,namely,Hartmann number,Schmidt number,source/sink parameter,Prandtl number and chemical reaction parameter,has been illustrated on the developing velocity and some concentration *** important quantities of engineering interest-surface skin friction and volumetric flow rates-have been computed too and *** notable finding worth mentioning are:(a)heat source presence causes higher fluid velocity as compared to the heat sink;(b)all important surface shear stress can be suitably controlled,among others,by chemical reaction parameter and Schmidt *** key challenge of this study has been to obtain exact closed-form solutions of the field equations,including cumbersome Laplace *** study finds innovative applications in the emerging fields such as magnetic materials processing,chemical processes,solar energy systems,etc.

关键词： Circular cylinder Hydromagnetic transient flow Chemical reaction Source/sink Free convection

Hybrid Machine Learning Model for Face Recognition Using SVM

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Computers, Materials & Continua 2022年第8期72卷 2697-2712页

作者： Anil kumar Yadav R.K.Pateriya nirmal kumar Gupta Punit Gupta Dinesh kumar Saini Mohammad Alahmadi IES College of Technology Bhopal462044India Maulana Azad National Institute of Technology Bhopal462003India Department of Information Technology Manipal University JaipurJaipur303007India Department of Computer and Communication Engineering Manipal University JaipurJaipur303007India Department of Software Engineering College of Computer Science and EngineeringUniversity of JeddahJeddah23218Saudi Arabia

Face recognition systems have enhanced human-computer interactions in the last ten ***,the literature reveals that current techniques used for identifying or verifying faces are not immune to *** Component Analysis-Support Vector Machine(PCA-SVM)and Principal Component Analysis-Artificial Neural Network(PCA-ANN)are among the relatively recent and powerful face analysis *** to PCA-ANN,PCA-SVM has demonstrated generalization capabilities in many tasks,including the ability to recognize objects with small or large data *** from requiring a minimal number of parameters in face detection,PCA-SVM minimizes generalization errors and avoids overfitting problems better than ***-SVM,however,is ineffective and inefficient in detecting human faces in cases in which there is poor lighting,long hair,or items covering the subject’s *** study proposes a novel PCASVM-based model to overcome the recognition problem of PCA-ANN and enhance face *** experimental results indicate that the proposed model provides a better face recognition outcome than PCA-SVM.

关键词： Face recognition system(FRS) face identification SVM discrete cosine transform(DCT) artificial neural network(ANN) machine learning

Study of locust bean gum reinforced cyst-chitosan and oxidized dextran based semi-IPN cryogel dressing for hemostatic application

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Bioactive Materials 2018年第3期3卷 370-384页

作者： Lalit kumar meena Pavani Raval Dhaval Kedaria Rajesh Vasita School of Life Sciences Central University of GujaratSector-30Gandhinagar 382030India Government Engineering College Sector-28Gandhinagar 382028India

Severe blood loss due to traumatic injuries remains one of the leading causes of death in emergency *** continues to be the candidate material for hemostatic applications due to its inherent hemostatic ***,available chitosan-based dressings have been reported to have an acidic odor at the wound site due to the incorporation of acid based solvents for their fabrication and deformation under compression owing to low mechanical strength limiting its *** the present study semi-IPN cryogel was fabricated via Schiff's base cross-linking between the polyaldehyde groups of oxidized dextran and thiolated chitosan in presence of locust bean gum(LBG)known for its *** at12C yielded macroporous semi-IPN cryogels with an average pore size of 124.57±20.31 mm and 85.46%*** hydrophobicity index of LBG reinforced semi-IPN cryogel was reduced 2.42 times whereas the swelling ratio was increased by 156.08%compare to control *** increased hydrophilicity and swelling ratio inflated the compressive modulus from 28.1 kPa to 33.85 for LBG reinforced semi-IPN *** structural stability and constant degradation medium pH were also recorded over a period of 12 *** cryogels demonstrated lower adsorption affinity towards *** cytotoxicity assays(direct,indirect)with 3T3-L1 fibroblast cells confirmed the cytocompatibility of the *** hemolysis assay showed<5%hemolysis confirming blood compatibility of the fabricated cryogel,while whole blood clotting and platelet adhesion assays confirmed the hemostatic potential of semi-IPN cryogel.

关键词： Chitosan Oxidized dextran Locust bean gum Cryogel Hemostasis

Development and performance characterization of a compact plasma focus based portable fast neutron generator

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Plasma Science and Technology 2020年第11期22卷 127-135页

作者： Rishi VERMA Ekansh MISHRA Prosenjit DHANG Basanta kumar DAS Manraj meena Lakshman RONGALI Archana SHARMA Pulsed Power&Electromagnetics Division Bhabha Atomic Research Centre FacilityAtchutapuramVishakhapatnam 531011.India Homi Bhabha National Institute AnushaktinagarMumbai 400094India Raja Ramanna Centre for Advanced Technology Rajendra NagarIndore 452013India Variable Energy Cyclotron Centre BidhannagarKolkata 700064India

The design details and performance characterization results of a newly developed plasma focus based compact and portable system(0.5 m×0.5 m×1.2 m,weighing≈100 kg)that produces an average neutron yield of^2×10^8 neutrons/shot(of fast D-D neutrons with typical energy^2.45 Me V)at^1.8 k J energy discharge are *** the detailed analysis of the experimental characterization and simulation results of this system,it has been conclusively revealed that specifically in plasma focus devices with larger static inductance:(i)pinch current is a reliable and more valid neutron yield scaling parameter than peak current,(ii)the ratio of pinch/peak current improves as static inductance of the system reduces,(iii)the benign role of the higher static/pinch inductance ratio enables the supply of inductively stored energy in densely pinched plasma with a larger time constant and it is well depicted by the extended dip observed in the discharge current trace,(iv)there is the need to redefine existing index values of the pinch(Ipinch^4.7)and peak(Ipeak^3.9)currents in neutron yield scaling equations to higher values.

关键词： plasma focus neutrons time of flight pinch current peak current plasma pinch pseudospark switch

Impact of ultrasonic power on liquid fraction,microstructure and physical characteristics of A356 alloy molded through cooling slope

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Journal of Central South University 2022年第4期29卷 1098-1106页

作者： Pabak MOHAPATRA nirmal kumar KUND Department of Production Engineering VSS University of TechnologyBurla 768018India

This study involves A356 alloy molded through ultrasonically vibrated cooling *** slope alongside ultrasonic power enables indispensable shear for engendering slurry from which the semisolid cast/heat treated billets got *** examination demonstrates ultrasonically vibrated cooling slope influencing the liquid fraction/microstructure/physical characteristics of stated *** investigation encompasses five diverse ultrasonic powers(0,75,150,200,250 W).The ultrasonic power of 150 W delivers finest/rounded microstructure with enhanced physical *** modifications reason physical transformations because of grain refinement and grain boundary/Hall-Petch strengthening.A smaller grain size reasons a higher strength/shape factor and an increased homogeneity reasons a higher *** characteristics get improved by *** is owing to coalescence throughout temperature *** physical characteristics is improved by reheating because of a reduced porosity and enhanced dissolution besides augmented homogeneity.A direct comparison remains impossible owing to unavailability of researches on ultrasonically vibrated cooling slope.

关键词： ultrasonic power microstructure physical characteristics semisolid cast A356 alloy cooling slope