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37篇 您的检索式:作者名="Jay Kumar"
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1CFD modeling to study the effect of particle size on dispersion in 20l explosion chamber: An overview显示文摘Mine disasters occur predominantly due to methane or coal dust explosion or a combination of both.Among the top ten worst coal mine disasters in India, nine are due to coal dust explosion. The current paper describes a general overview of the parameters causing dispersion leading to coal dust explosion,and computational fluid dynamics(CFD) simulation study to observe the effects of particle size on dispersion in Indian coal mines. Turbulent kinetic energy(TKE) and velocity vector path of dust-air mixture and dust-free air were simulated to understand their effects on coal dust dispersion. The TKE contours and velocity vector paths for dust-free air were uniform and symmetrical due to resistance-free path available. The TKE contours and velocity vector paths for dust-air mixture shows the asymmetrical distribution of contours, due to entrainment of air with dust particles. Vortices were observed in velocity vector paths which gradually diminish on increment of time sequence. These vortices are dead centres where velocity and coal dust particles concentration are both zero.Santosh Kumar Ray Niroj Kumar Mohalik Asfar Mobin Khan Debashish Mishra Nikhil Kumar Varma Jai Krishna Pandey Pradeep Kumar Singh 2020International Journal of Mining Science and Technology2020,30,3:3
2Review of preventive and constructive measures for coal mine explosions:An Indian perspective显示文摘Firedamp and coal dust explosion constitute a lion’s share in mine accidents in a global mining scenario.This paper reports a list of mine explosion disasters since last two decades,a critical review of the different prevention and constructive measures,and its recent development to avoid firedamp and coal dust explosion.Preventive legislation in core coal-producing countries,viz.China,USA,Australia,South Africa,and India related to firedamp and coal dust explosion are critically analysed.Accidents occurred due to explosion after Nationalisation of Coal Mines(1973)in India are listed.Prevention and constructive measures adopted in India are critically analysed with respect to the global mining scenario.Measures like methane credit concept,classification of mines/seams with respect to explosion risk zone,deflagration index;installation of automatic fire warning devices,canopy air curtain technology,explosion-prevention measures,such as fire-retardant materials,inhibitors,extinguishing agent,dust suppressor,and active explosion barrier are discussed in detail to avoid explosion and thereby adhering to zero accident policy due to coal mine explosion.Santosh Kumar Ray Asfar Mobin Khan Niroj Kumar Mohalik Debashish Mishra Somu Mandal Jai Krishna Pandey 2022International Journal of Mining Science and Technology2022,32,3:2
3TGA/DSC study to characterise and classify coal seams conforming to susceptibility towards spontaneous combustion显示文摘Thermogravimetric analysis/differential scanning calorimeter(TGA/DSC)technique along with basic coal characteristics study is carried out for eighty coal samples of Indian coalfields,to determine spontaneous combustion propensity behaviour of coal.TGA study of coal samples indicates that there is an increase in the mass of coal samples in the temperature range 150-350℃,which may be due to oxygen adsorption and absorption.The correlation and principal component analysis states that the component of proximate analysis(M_(ad),VM_(d),FR,and VR)have an acceptable correlation with the TGA experiments results i.e.,Tgsh and Tgign.Multiple fixed nonlinear regression analysis shows that thermogravimetry(TG)experiment results Tgign may be the best index to categorise/classify the coal as per their susceptibility towards spontaneous combustion.The authors proposed four groups of classification as per their propensity towards spontaneous combustion depending upon the moisture(M_(ad)),volatile matter(VM_(d)),and TG ignition temperature from differential thermogravimetric(DTG)curve(Tgign)using hierarchal clustering analysis.The coal samples of different seams from Indian coalfield may be classified into four different clusters,viz.very highly/extremely susceptible(Tgign<260℃),highly susceptible(260℃≤Tgign<290℃),moderately susceptible(290℃≤Tgign≤320℃),and poorly susceptible(Tgign>320℃).The field observations and TGA/DSC experiment results with the following statistical analysis substantiate a similar assessment.Niroj Kumar Mohalik Somu Mandal Santosh Kumar Ray Asfar Mobin Khan Debashish Mishra Jai Krishna Pandey 2022International Journal of Mining Science and Technology2022,32,1:2
4In vitro and in vivo studies on the antioxidant activity of fish peptide isolated from the croaker (Otolithes ruber)muscle protein hydrolysate 显示文摘Nazeer R A Kumar N S Jai G R 2012Peptides2012,35,2:1
5Phytochemical evaluation and antispermatogenic activity of Thevetia peruviana methanol extract in male albino rats显示文摘Rajnish Gupta Jai B. S. Kachhawa R. S. Gupta Anil Kumar Sharma M. C. Sharma M. P. Dobhal 2011Human Fertility2011,,1:1
6In vitro and in vivo studies on the antioxidant activity of fish peptide isolated from the croaker (Otolithes ruber) muscle protein hydrolysate显示文摘Nazeer R A Sampath Kumar N S Jai Ganesh R 0,,:1
7Finite size effect on dissociation and diffusion of chiral partners in Nambu-Jona-Lasinio model显示文摘The masses of pion and sigma meson modes,along with their dissociation in the quark medium,provide detailed spectral structures of the chiral partners.Collectivity has been observed in pA and pp systems both at LHC and RHIC.In this research,we studied the restoration of chiral symmetry by investigating the finite size effect on the detailed structure of chiral partners in the framework of the Nambu-Jona-Lasinio model.Their diffusion and conduction have been studied using this dissociation mechanism.It is determined that the masses,widths,diffusion coefficients,and conductivities of chiral partners merge at different temperatures in the restoration phase of chiral symmetry.However,merging points are shifted to lower temperatures when finite size effect is introduced into the picture.The strengths of diffusions and conductions are also reduced once the finite size is introduced in the calculations.Paramita Deb Sabyasachi Ghosh Jai Prakash Santosh Kumar Das Raghava Varma 2022Chinese Physics C2022,46,4:1
8In vitro and in vivo studies on the antioxidant activity of fish peptide isolated from the croaker (Otolithes ruber) muscle protein hydrolysate显示文摘Nazeer R A Sampath Kumar N S Jai Ganesh R 2012Peptides2012,35,:1
9Design and synthesis of organochalcogen (Se or Te) based multifunctional derivatives: structural determination and dynamic behavior of 2-chloro-4,6-bis(phenylselenoethylamino)-1,3,5-triazines显示文摘Marilyn Daisy Milton Naveen Kumar Sarbjot Singh Sokhi Sarika Singh Monika Maheshwari Jai Deo Singh Minakshi Asnani Raymond J. Butcher 2004Tetrahedron Letters2004,,48:1
10Heart disease in pregnancy: cardiac and obstetric outcomes显示文摘Murali subbaiah Vaishali Sharma Sunesh kumar S. Rajeshwari Shyam Sunder Kothari Kallol Kumar Roy Jai Bhagwan Sharma Neeta Singh 2013Archives of Gynecology and Obstetrics2013,,1:1
11In vitro and in vivo studies on the antioxidant activity of fish peptide isolated from the croaker(Otolithes ruber)muscle protein hydrolysate显示文摘Nazeer R A Sampath Kumar N S Jai Ganesh R 2012Peptides2012,35,:1
12Clinical outcomes for nasopharyngeal cancer with intracranial extension after taxanebased induction chemotherapy and concurrent chemo-radiotherapy in the modern era显示文摘Objective:To evaluate the survival outcomes for a cohort of nasopharyngeal cancer with intracranial extension(ICE)treated with induction chemotherapy(ICT)followed by chemo-intensity-modulated radiotherapy(CTRT)at a tertiary cancer center.Methods:We retrospectively analyzed 45 patients with histologically proven,non-metastatic NPC with ICE treated at our institute between October 2008 and October 2016.Patients were classified as minor ICE or major ICE,based on the extent of ICE.All the patients received 2-3 cycles of a taxane-based ICT regimen followed by CTRT.Radiotherapy was delivered with'riskadapted'intensity-modulated radiotherapy(IMRT)technique in all patients.Results:After a median follow up of 45 months(range:8-113 months),the estimated 5-year DFS,LRFS,DMFS,and OS of the entire cohort was 58%,82%,67%and 74%respectively.On multivariate analysis,histological subtype was an independent predictor of LRFS,and age was an independent predictor of DFS.The extent of ICE showed only a trend towards worse DFS(P=0.06).None of the factors significantly predicted for DMFS or OS.Gender,N-stage,and response to ICT did not significantly affect any of the outcomes.Grade 2 or worse subcutaneous fibrosis was seen in 22%of patients and grade 2 or worse xerostomia was seen in 24%of patients at last follow up.Thirty-three percent of the patients developed clinical hypothyroidism at last follow up.None of the patients experienced any neurological or vascular complications.Conclusions:Taxane-based induction chemotherapy followed by chemo-intensity modulated radiotherapy resulted in excellent locoregional control and survival with acceptable toxicities in patients of nasopharyngeal cancer with intracranial extension.Distant metastasis continues to be the predominant problem in these patients.Sarbani Ghosh-Laskar Avinash Pilar Carlton Johnny Kumar Prabhash Amit Joshi Jai Prakash Agarwal Tejpal Gupta Ashwini Budrukkar Vedang Murthy Monali Swain Vanita Noronha Vijay Maruthi Patil Prathamesh Pai Deepa Nair Devendra Arvind Chaukar Shivakumar Thiagarajan Gouri Pantvaidya Anuja Deshmukh Pankaj Chaturvedi Sudhir Nair Anil D’Cruz 2020World Journal of Otorhinolaryngology-Head and Neck Surgery2020,6,1:1
13Season modulates endocrinological profiles and sex behavioural characteristics in indigenous male goats under tropical humid island ecosystem显示文摘Objective:To measure the seasonal effect on endocrinological profiles and sex behavioural profiles during rainy and dry summer seasons in male Andaman local goat in Andaman and Nicobar Islands,India.Methods:Ten adult male Andaman local goats were selected from the goat breeding farm,ICAR-Central Island Agricultural Research Institute,Port Blair,Andaman and Nicobar Islands,India.Endocrinological profiles such as follicle stimulating hormone(FSH),luteinizing hormone(LH),testosterone,thyroid stimulating hormone(TSH),triiodothyronine(T3),thyroxine(T4),cortisol and prolactin were analysed with enzyme-linked immunosorbent assay kits.Sex behavioural profiles such as libido score,mating ability score and sex behavioural score were measured during rainy and dry summer seasons in male Andaman local goat.Results:Endocrinological profiles as well as sex behavioural profiles differed significantly between rainy season and dry summer season(P<0.05).The levels of FSH,LH,testosterone,TSH,T3,and T4 were significantly higher in rainy season than in dry summer season whereas cortisol and prolactin were significantly higher in dry summer season than in rainy season(P<0.05).The ratio of T3:T4 was significantly higher in rainy season than in dry summer season.Similarly,libido score,mating ability score and sex behavioural score were significantly higher in rainy season than in dry summer season(P<0.05).Conclusions:Rainy season has significantly higher beneficial effects than summer season on reproduction and artificial breeding programmes in semi-intensive management of goat under the tropical humid island ecosystem in Andaman and Nicobar Islands.Perumal Ponraj Jai Sunder Arun Kumar De Rafeeque Rahman Alyethodi Purna Chandra Mishra Sneha Bhowmick Debasis Bhattacharya 2022Asian pacific Journal of Reproduction2022,11,4:1
14Tuberculosis of spine(C1-D4)显示文摘Jai AK Kumar S Tuli SM 1999Spine Cord1999,37,5:1
15An eclectic approach in energy forecasting: a case of Natural Resources Canada's (NRCan's) oil and g as outlook 显示文摘Persaud A Jai Urea Kumar 2001Energy Policy2001,29,4:1
16Singh,Kalyan Das and Babu Verghese Synthesis of some functionalized isomeric bis(ethylenedithio)tetrathiafulvalene (BEDT-TTF) and dithiophenetetrathiafulvalene(DTTTF) π-donors显示文摘E V K Suresh Kumar Jai D Singh Harkesh B 1997Tetrahedron1997,53,11:1
17Effect of fuel injection pressure and injection timing of Karanja biodiesel blends on fuel spray,engine performance,emissions and combustion characteristics显示文摘Avinash Kumar Agarwal Atul Dhar Jai Gopal Gupta 2015Energy Conversion and Management2015,,91:1
18Spinal cord compression secondary to bone metastases from hepatocellular carcinoma显示文摘骨头转移在主要肝细胞癌(HCC ) 是稀罕的。脊髓压缩(SCC ) 由于骨头,转移与肺和胸在病人通常发生癌,和变形 HCC 是 SCC 的一个不平常的原因。脊髓压缩是一种 oncologic 紧急情况,治疗延期能导致不可逆的后果。因此, SCC 能由于 HCC 是骨头转移的潜在的复杂并发症的了解具有在能改进生命的质量和病人的幸存的早治疗的开始的意义,如果更早诊断了。这篇论文由于骨头转移与 SCC 的改变的表明描述主要 HCC 的四个盒子。首先与相应于骨头转移地点的骨头疼痛的症状而非联系肝的病理并且最后的症状介绍的第一个病人开发了 SCC。第二个病人,作为有 HCC 诊断了,在病,他与以后的固定为经历了紧急情况椎板切除术的功课期间导致截瘫的发达额外的硬脑膜的 SCC。第三个病人此后不久开发了 SCC 主要诊断并且不得不经历紧急情况椎板切除术。波斯特椎板切除术他有好神经病学的恢复。作为 SCC 的第一表明首先根的疼痛而非坦率的截瘫地介绍的第四个病人。Dinesh Chandra Doval Komal Bhatia Ashok Kumar Vaid Keechelat Pavithran Jai Bhagwan Sharma Digant Hazarika Amarnath Jena 2006World Journal of Gastroenterology2006,12,32:1
19Slurry-sampling with rapid atomization versus microwave digestion with conventional atomization for the determination of copper, manganese and nickel in algae matrix using transverse heated-electrothermal atomic absorption spectrometry显示文摘Noorbasha N Meeravali Sunil Jai Kumar 2000Analytica Chimica Acta2000,404,:1
20Acute kidney injury in late pregnancy in developing countries显示文摘Jai Prakash Shashidhar Shree Niwas Aashish Parekh Laxmi Kant Pandey Loukrakpam Sharatchandra Puneet Arora Amit Kumar Mahapatra 2010Renal Failure2010,,3:1
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