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Effect of temperature dependent viscosity on revolving axi-symmetric ferrofluid flow with heat transfer

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Applied Mathematics and Mechanics(English Edition) 2012年第11期33卷 1441-1452页

作者： P. ram V. KUMAR Department of Mathematics National Institute of TechnologyKurukshetra Haryana 136119 India

The prime objective of the present study is to examine the effect of tempera- ture dependent viscosity/z（T） on the revolving axi-symmetric laminar boundary layer flow of an incompressible, electrically non-conducting ferrofiuid in the presence of a stationary plate subjected to a magnetic field and maintained at a uniform temperature. To serve this purpose, the non-linear coupled partial differential equations are firstly converted into the ordinary differential equations using well-known similarity transformations. The popular finite difference method is employed to discretize the non-linear coupled differ- ential equations. These discretized equations are then solved using the Newton method in MATLAB, for which an initial guess is made with the help of the Flex PDE Solver. Along with the velocity profiles, the effects of temperature dependent viscosity are also examined on the skin friction, the heat transfer, and the boundary layer displacement thickness. The obtained results are presented numerically as well as graphically.

关键词： ferrofluid temperature dependent viscosity boundary layer axi-symmetry,magnetic field

Image of polynomials under generalized Szasz operators

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Applied Mathematics(A Journal of Chinese Universities) 2021年第4期36卷 599-610页

作者： Pooja Gupta Mangey ram ramu Dubey Department of Mathematics J.C.Bose University of Science and TechnologyYMCAFaridabad 121006India Department of Mathematics Computer Science and Engineering Graphic Era Deemed to be UniversityDehradun 248002India

The motivation behind this paper is a sequence Sn of generalized Szasz operators using multiple Appell *** purpose of the present paper is to find the image of the polynomials under these *** find that as n→∞,S_(n)(t^(m);x)approaches to x^(m)for every m∈***,We prove the image of a polynomial of degree m under these operators is another polynomial of degree m by using the linearity of these operators.

关键词： Szaasz operator multiple Appell polynomials image of polynomials

STOCHASTIC SYNCHRONIZATION OF CIRCADIAN RHYTHMS

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Journal of Systems Science & Complexity 2010年第5期23卷 978-988页

作者： RajKumar Brojen SINGH Vikram SINGH ram ramASWAMY Centre for Interdisciplinary Research in Basic Sciences Jamia Milia Islamia New Delhi 110025 India Center for Computational Biology and Bioinformatics School of Information Technology Jawaharlal Nehru University New Delhi 110067 India Center for Computational Biology and Bioinformatics School of Information Technology and School of Physical Sciences Jawaharlal Nehru University New Delhi 110067 India

Models of circadian genetic oscillators involving interlinked feedback processes in molecular level genetic networks in Drosophila melanogaster and Neurospora crassa are studied, and mechanisms whereby synchronization can arise in an assembly of cells are examined. The individual subcellular circadian oscillatory processes are stochastic in nature due to the small numbers of molecules that are involved, and are subject to large fluctuations. The authors investigate and present the simulations of the stochastic dynamics of ensembles of clock-regulating proteins in different nuclei that communicate via ancillary small molecules, environmental parameters, additive cellular noise, or through diffusive processes. The results show that the emergence of collective oscillations is a macroscopic observable which has its origins in the microscopic coupling between distinct cellular oscillators.

关键词： Coupling stochastic dynamics synchrony.

Seedling potential of trees species along the elevational gradient in temperate hill forest of central Nepal

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Journal of Mountain Science 2024年第4期21卷 1329-1344页

作者： DANI ram Sharan BANIYA Chitra Bahadur Central Department of Botany Tribhuvan UniversityKirtipur 44618Nepal

Regeneration status of tree species along elevation gradient in temperate hill forest was not understood *** research examined the tree diversity and its regeneration patterns along an elevation gradient in temperate hill forest,central *** were collected from 300 sample plots within vertical elevation bands of 10,ranging from 1365 to 2450 m asl.A random sampling method was used for data collection in three seasons,winter,pre-monsoon and post monsoon *** at breast height(DBH)was used to broadly categorize the plant individual into trees,saplings and *** tree species richness ranged from 12 to 25 with density of 350 to 1200 individuals per *** richness of tree and sapling showed statistically significant unimodal pattern,which peaked at *** showed a strong and positive linear correlation with the seedling density(Deviance=0.99,pseedling(10.6%)≤mature(10.9%).Among tested environmental variables,elevation and annual mean rainfall were the most influential factors in the regeneration of tree species.

关键词： Regeneration potential Chandragiri hill Altitudinal gradient Species diversity Tree species richness

Potential of biocontrol agents against Ganoderma lucidum causing basal stem rot in mesquite(Prosopis cineraria)in arid regions of India

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Journal of Forestry Research 2021年第3期32卷 1269-1279页

作者： Ritu Mawar Deepesh Sharma Ladhu ram ICAR-Central Arid Zone Research Institute Jodhpur 342003India College of Horticulture and Forestry JhalarapatanJhalawar 326001India

This study investigates the potential of native biocontrol agents(BCAs)as controls against Ganoderma lucidum causing root rot mortality in Indian *** disease is prevalent in sandy soils where trees grow under rainfed *** addition,a beetle namely A canthophorus serraticornis damages the roots,resulting in increasing vulnerability of the host thereby allowing easy of the *** dual culture tests,Ganoderma infected cowpea root bit experiment and compatibility with insecticides revealed that the three BCAs(Trichoderma longibrachiatum,***,and Aspergillus nidulans)significantly inhibited *** mycelial *** highest mycelial growth inhibition(47.6%)was recorded after 96 h followed by 39.8%and 29.3%at 72 and 48 h,respectively,by *** free filtrates of ***,***,and *** were superior in inhibiting mycelium growth.A low concentration(3 ml)of *** was more effective in inhibiting mycelium growth compared to other *** P rosopis julifl ora compost and onion residue compost amendments as food substrates favored the growth of these BCAs,which ultimately reduced the viability of Ganoderma-colonized root bits of *** on compatibility between insecticides and BCAs suggests that ***,harzianum and *** can be combined with phorate or chloropyriphos(both organophosphates)at variable concentrations if amended together for partially infected trees,or as a prophylactic measure in healthy *** studies demonstrate that there is considerable opportunity for using native BCAs against *** in managing root rot disease.

关键词： Trichoderma longibrachiatum Trichoderma harzianum Aspergillus nidulans Prosopis cineraria Onion residues Prosopis juliflora compost

Non-invasive cuffless blood pressure and heart rate monitoring using impedance cardiography

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Intelligent Medicine 2022年第4期2卷 199-208页

作者： Sudipta Ghosh Bhabani prasad Chattopadhyay ram Mohan Roy Jayanta Mukherjee Manjunatha Mahadevappa Department of Computer Science&Engineering Indian Institute of Technology KharagpurKharagpurWest Bengal 721302India School of Medical Science&Technology Indian Institute of Technology KharagpurKharagpurWest Bengal 721302India Department of Cardiology Medical College&HospitalKolkataWest Bengal 700073India

Background Continuous blood pressure(BP)monitoring provides additional information about how changes in BP may correlate with daily activities and sleep *** from the American Heart Association and American College of Cardiology strongly suggest confirming a diagnosis of hypertension with continuous BP ***-invasive and non-intrusive detection of haemodynamic parameters is emerging as a norm,based on self-monitoring wearable medical *** have carried out several studies using non-invasive and continuous BP measurements as an alternative to conventional cuff-based *** this work,we proposed a novel method for cuffless estimation of BP using impedance cardiography(ICG).Methods We conducted a single-centre,cross-sectional study of 104 subjects(of whom 30 were categorized as controls and the remaining 74 as the disease group)at the Medical College and Hospital,*** disease group consisted of patients with confirmed coronary artery disease,while the individuals in the control group were deemed to be *** subjects underwent electrocardiogram recording by on-duty doctors in order to determine their health status.A custom-made device based on the principle of impedance plethysmography was designed to record impedance changes due to subjects’peripheral blood *** device was used to record ICG *** this study,we developed a novel auto-adaptive algorithm based on ICG signals for non-invasive,cuffless,continuous monitoring of BP and heart *** mathematical models were developed for all the estimated parameters(BP and heart rate)for both the study groups(control and disease).The developed models were auto-adaptive and did not require subject-specific *** indicators including,𝑟2,error percentage,standard deviation,and mean difference were used to quantify the performance of the *** The ICG signal recorded by the device was used to extract features and compute t

关键词： Impedance cardiography Augmentation index Systolic pressure Diastolic pressure Heart rate

Modeling the Spike Response for Adaptive Fuzzy Spiking Neurons with Application to a Fuzzy XOR

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Computer Modeling in Engineering & Sciences 2018年第6期115卷 295-311页

作者： A.M.E.ramírez-Mendoza CONACYT Research Fellow–State University of Nuevo León(UANL for its acronym in Spanish) Mechanical and Electrical Engineering School(FIME for its acronym in Spanish)Center for Research and Innovation in Aeronautical Engineering(CIIIA for its acronym in Spanish)Carretera a Salinas Victoria km.2.3ApodacaNuevo LeónMéxico

A spike response model(SRM)based on the spikes generator circuit(SGC)of adaptive fuzzy spiking neurons(AFSNs)is *** SRM is simulated in MatlabTM *** proposed model is applied to a configuration of a fuzzy exclusive or(fuzzy XOR)operator,as an illustrative example.A description of the comparison of AFSNs with other similar methods is *** novel method of the AFSNs is used to determine the value of the weights or parameters of the fuzzy XOR,first with dynamic weights or self-tuning parameters that adapt continuously,then with fixed weights obtained after training,finally with fixed weights and a dynamic gain or self-tuning gain for a fine adjustment of amplitude.

关键词： Spike response model spikes generator circuit fuzzy XOR adaptive fuzzy spiking neuron learning algorithm fuzzy neuron self-tuning

Voltage-Mode Universal Biquad Filter Employing Single Voltage Differencing Differential Input Buffered Amplifier

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Circuits and Systems 2013年第1期4卷 44-48页

作者： Kanhaiya Lal Pushkar Data ram Bhaskar Dinesh prasad Department of Electronics and Communication Engineering Faculty of Engineering and Technology Jamia Millia Islamia New Delhi India Department of Electronics and Communication Engineering Maharaja Agrasen Institute of Technology New Delhi India

A new multi function voltage-mode universal biquadratic filter using single Voltage Differencing Differential Input Buffered Amplifier (VD-DIBA), two capacitors and one resistor is proposed. The proposed configuration has four inputs and one output and can realize all the five standard filters from the same circuit configuration. The presented biquad filter offers low active and passive sensitivities. The validity of proposed universal biquadratic filter has been verified by SPICE simulation using 0.35 μm MIETEC technology.

关键词： Voltage Differencing Differential Input Buffered Amplifier Analog Filter Voltage-Mode

Full polarimetric PALSAR-based land cover monitoring in Cambodia for implementation of REDD policies

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International Journal of Digital Earth 2013年第3期6卷 255-275页

作者： ram Avtar Wataru Takeuchi Haruo Sawada Institute of Industrial Science The University of TokyoTokyoJapan

Forest cover monitoring plays an important role in the implementation of climate change mitigation policies such as Kyoto protocol and Reducing Emissions from Deforestation and Forest Degradation(REDD).In this study,we have monitored land cover using the PALSAR(Phased Array type L-band Synthetic Aperture Radar)full polarimetric data based on incoherent target *** classification technique has been applied on CloudePottier decomposition,FreemanDurden three component,and Yamaguchi four component decomposition for accurate mapping of different types of land cover *** on confusion matrix derived from the predicted and defined pixels,the evergreen and sparsely deciduous forests have shown high producer’s accuracy by FreemanDurden three component and Yamaguchi four component classifica*** overall accuracy of Maximum Likelihood Classification by Yamaguchi four component is 94.1%with 0.93 kappa coefficient as compared to the 90.3%with 0.88 kappa coefficient by FreemanDurden three component and 89.7%with 0.88 kappa coefficient by CloudePottier *** accuracy of classification in a forested area using full polarimetric PALSAR data may have been because of high penetration of L-band *** content of this study could be useful for the forest cover mapping during cloudy days needed for proper implementation of REDD policies in Cambodia.

关键词： global climate change REDD PALSAR forest cover mapping