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| 1 | Discrete element approach for mine dump stability analysis显示文摘Mine overburden dumps have posed significant safety issues in the operations of various unit operations of open pit min-ing especially the external dumps. The external dumps are composed of a mixture of fragmented rocks and loose soil. Their charac-teristic is comparable to heavily discontinuous solid mass. The conventional approach of limit equilibrium methods provide safety factors for the slope but nothing about the stress-strain characteristics of the large dump mass. The designs of dump location and their respective geometry are integrated for the know-how of the stability characteristics of these dumps. The discrete element method uses a circular disk to represent the granular solid mass and their interactions are described by the Newton’s third law of motion. The displacement is described by the sliding of the circular disk. This work is focused on the modeling efficiency of the discrete element methods to represent the behaviour of mine dump masses with the specified joint plane for the limit equilibrium method. The advantage of the work lies on the ease of information retrieval at any point at the dump mass concerning the stress and strain histories, displacement, failures etc. which when integrated produces a better understanding of the stability of the dump masses. | RADHAKANTA Koner DEBASHISH Chakravarty | 2010 | Mining Science and Technology2010，20，6： | 8 |
| 2 | Carbon nanotubes:Evaluation of toxicity at biointerfaces显示文摘Carbon nanotubes (CNTs) are a class of carbon allotropes with interesting properties that make them productive materials for usage in various disciplines of nanotechnology such as in electronics equipments, optics and therapeutics. They exhibit distinguished properties viz., strength, and high electrical and heat conductivity. Their uniqueness can be attributed due to the bonding pattern present between the atoms which are very strong and also exhibit high extreme aspect ratios. CNTs are classified as singlewalled carbon nanotubes (SWCNTs) and multi-walled carbon nanotubes (MWCNTs) on the basis of number of sidewalls present and the way they are arranged spatially. Application of CNTs to improve the performance of many products, especially in healthcare, has led to an occupational and public exposure to these nanomaterials. Hence, it becomes a major concern to analyze the issues pertaining to the toxicity of CNTs and find the best suitable ways to counter those challenges. This review summarizes the toxicity issues of CNTs in vitro and in vivo in different organ systems (bio interphases) of the body that result in cellular toxicity. | Debashish Mohanta Soma Patnaik Sanchit Sood Nilanjan Das | 2019 | Journal of Pharmaceutical Analysis2019，9，5： | 4 |
| 3 | Molecular Characterization of the Calvin Cycle Enzyme Phosphoribulokinase in the Stramenopile Alga Vaucheria litorea and the Plastid Hosting Mollusc Elysia chlorotica显示文摘Phosphoribulokinase (PRK ) ,一个原子编码对光合的碳减小(加尔文) 唯一的质体局部性的酶周期,从 stramenopile 水藻 Vaucheria litorea 被克隆并且描绘。这水藻是为软体动物(海蛞蝓) 的质体的来源使动物能完全由 photoautotrophic CO2 幸存月的 Elysia chlorotica 固定。1633-bp V。litorea prk 基因被克隆并且编码区域,发现被四 introns 打断,编码 405-amino 酸蛋白质。这蛋白质包含被指导到建筑群的原子编码蛋白质期望的典型由两部组成的目标顺序(即四膜界限) 海藻的质体。PRK 和酶活动的 De novo 合成在 E 被检测。尽管有 V 被饿了的 chlorotica。为几个月的 litorea。不同于海藻的酶,在海蛞蝓的 PRK 没展出氧化还原作用规定。部分编码 PRK 基因的二个拷贝用 PCR 从两海蛞蝓和 aposymbiotic 海蛞蝓鸡蛋 DNA 被孤立。每个拷贝包含跨越 exon 的核苷酸区域 1 并且 exon 的部分 2 V。litorea prk,包括由两部组成的指向肽。然而,更大的 prk 碎片也包括 intron 1。在 E 的 prk 的 exon 和 intron 序列。chlorotica 和 V。litorea 是将近相同的。这些数据建议 PRK 是在 V 调整的差别。litorea 和 E。chlorotica 和 V 的至少部分。litorea 原子 PRK 基因在被饿几个月了的海蛞蝓是在场的。 | Mary E. Rumpho Sirisha Pochareddy Jared M. Worful Elizabeth J. Summer Debashish Bhattacharya Karen N. Pelletreau Mary S. Tyler Jungho Lee James R. Manhart Kara M. Soule | 2009 | Molecular Plant2009，2，6： | 3 |
| 4 | Development of a mass model in estimating weight-wise particle size distribution using digital image processing显示文摘Particle size distribution of coarse aggregates through mechanical sieving gives results in terms of cumulative mass percent. But digital image processing generated size distribution of particles, while being fast and accurate, is often expressed in terms of area function or number of particles. In this paper, a mass model is developed which converts the image obtained size distribution to mass-wise distribution, making it readily comparable to mechanical sieving data. The concept of weight/particle ratio is introduced for mass reconstruction from 2D images of particle aggregates. Using this mass model, the effects of several particle shape parameters(such as major axis, minor axis, and equivalent diameter) on sieve-size of the particles is studied. It is shown that the sieve-size of a particle strongly depend upon the shape parameters, 91% of its variation being explained by major axis, minor axis, bounding box length and equivalent diameter. Furthermore, minor axis gives an overall accurate estimate of particle sieve-size, error in mean size(D-50) being just 0.4%. However, sieve-size of smaller particles(<20 mm) strongly depends upon the length of the smaller arm of the bounding box enclosing them and sieve-sizes of larger particles(>20 mm) are highly correlated to their equivalent diameters. Multiple linear regression analysis has been used to generate overall mass-wise particle size distribution, considering the influences of all these shape parameters on particle sieve-size. Multiple linear regression generated overall mass-wise particle size distribution shows a strong correlation with sieve generated data. The adjusted R-square value of the regression analysis is found to be 99 percent(w.r.t cumulative frequency). The method proposed in this paper provides a time-efficient way of producing accurate(up to 99%) mass-wise PSD using digital image processing and it can be used effectively to replace the mechanical sieving. | Maiti Abhik Chakravarty Debashish Biswas Kousik Halder Arpan | 2017 | International Journal of Mining Science and Technology2017，27，3： | 3 |
| 5 | CFD 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 | 2020 | International Journal of Mining Science and Technology2020，30，3： | 3 |
| 6 | Numerical analysis of rainfall effects in external overburden dump显示文摘The effect of slope angle for external overburden dump in response to average and heavy rainfall has been analyzed using a two dimensional finite difference method of transient water flow through unsaturated–saturated soil. The external dump stability is evaluated for five geomaterial types on the basis of globally accepted safety factor analysis technique, based on shear strength reduction approach using finite difference method. The results obtained from the finite difference method of analysis indicate that the external dump with more than 30° slope angle is greatly influenced by the rainfall under the studied conditions for geomaterial 3, 4 and 5, whereas dumps with geomaterial 1 and 2 remain safe. The analysis shows that major slope failure is out of preview for the studied rainfall conditions. | Radhakanta Koner Debashish Chakravarty | 2016 | International Journal of Mining Science and Technology2016，26，5： | 2 |
| 7 | Review 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 | 2022 | International Journal of Mining Science and Technology2022，32，3： | 2 |
| 8 | TGA/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 | 2022 | International Journal of Mining Science and Technology2022，32，1： | 2 |
| 9 | Marine enzymes 显示文摘 | Debashish G Malay S Barindra S | 2005 | Advances in Biochemical Engineering- Biotechnology2005，96，： | 1 |
| 10 | Grafu polymerization:Grafting poly(styrene) form cellulose via rrversible addition-fragmentation chain transfer(RAFT) polymerization显示文摘 | Debashish Roy James T.Guthrie Sehastien Perrier | | 0，，： | 1 |
| 11 | Feasibility of pancreatectomy following high-dose proton therapy for unresectable pancreatic cancer显示文摘AIM To review surgical outcomes for patients undergoing pancreatectomy after proton therapy with concomitant capecitabine for initially unresectable pancreatic adenocarcinoma.METHODS From April 2010 to September 2013,15 patients with initially unresectable pancreatic cancer were treated withproton therapy with concomitant capecitabine at 1000 mg orally twice daily. All patients received 59.40 Gy(RBE) to the gross disease and 1 patient received 50.40 Gy(RBE) to high-risk nodal targets. There were no treatment interruptions and no chemotherapy dose reductions. Six patients achieved a radiographic response sufficient to justify surgical exploration,of whom 1 was identified as having intraperitoneal dissemination at the time of surgery and the planned pancreatectomy was aborted. Five patients underwent resection. Procedures included:Laparoscopic standard pancreaticoduodenectomy(n = 3),open pyloris-sparing pancreaticoduodenectomy(n = 1),and open distal pancreatectomy with irreversible electroporation(IRE) of a pancreatic head mass(n = 1). RESULTS The median patient age was 60 years(range,51-67). The median duration of surgery was 419 min(range,290-484),with a median estimated blood loss of 850 cm^3(range,300-2000),median ICU stay of 1 d(range,0-2),and median hospital stay of 10 d(range,5-14). Three patients were re-admitted to a hospital within 30 d after discharge for wound infection(n = 1),delayed gastric emptying(n = 1),and ischemic gastritis(n = 1). Two patients underwent R0 resections and demonstrated minimal residual disease in the final pathology specimen. One patient,after negative pancreatic head biopsies,underwent IRE followed by distal pancreatectomy with no tumor seen in the specimen. Two patients underwent R2 resections. Only 1 patient demonstrated ultimate local progression at the primary site. Median survival for the 5 resected patients was 24 mo(range,10-30).CONCLUSION Pancreatic resection for patients with initially unresectable cancers is feasible after high-dose [59.4 Gy(RBE)] proton radiotherapy with a high rate of local control,acceptable surgical morbidity,and a median survival of 24 mo. | Kathryn E Hitchcock R Charles Nichols Christopher G Morris Debashish Bose Steven J Hughes John A Stauffer Scott A Celinski Elizabeth A Johnson Robert A Zaiden Nancy P Mendenhall Michael S Rutenberg | 2017 | World Journal of Gastrointestinal Surgery2017，9，4： | 1 |
| 12 | E-government Evaluation: A Framework and Case Study 显示文摘 | M P Gupta Debashish Jana | 2003 | Government Information Quarterly2003，，20： | 1 |
| 13 | Cellulose modification by polymer grafting:a review 显示文摘 | Debashish Roy Mona Semsarilar James T Guthrie | 2009 | Chemical Society Reviews2009，38，5： | 1 |
| 14 | E-government Evaluation:A Framework and Case Study 显示文摘 | M P Gupta Debashish Jana | 2003 | Government Information Quarterly2003，，20： | 1 |
| 15 | E-government evaluation A framework and case study 显示文摘 | Gupta M P Debashish J | 2003 | Government Infor rnation Quarterly2003，20，4： | 1 |
| 16 | Nimodipine attenuates biochemical, behavioral and histopathological alterations induced by acute transient and long-term bilateral common carotid occlusion in rats 显示文摘 | Yanpallewar S U Hota Debashish Rai Sunita | 2004 | Pharmacol Res2004，，49： | 1 |
| 17 | Particle hopping models for two-lane traffic with two kinds of vehicles: Effects of lane-changing rules显示文摘 | Debashish Chowdhury Dietrich E. Wolf Michael Schreckenberg | 1997 | Physica A: Statistical Mechanics and its Applications1997，，3： | 1 |
| 18 | Steps to defend against DoS at tacks 显示文摘 | Ahsan Habib Debashish Roy | 2009 | Computers and Information Technology Sylhet Ban- gladesh2009，2009，： | 1 |
| 19 | Cross-linking of micelles by gemini surfactants显示文摘 | Oliver Flimm Debashish Chowdhury Dietrich Stauffer | 2000 | Langmuir2000，16，： | 1 |
| 20 | Statistical Physics of Vehicular Traffic and Some Related Systems 显示文摘 | DEBASHISH C LUDGER S ANDREAS S | 2000 | Physics Reports2000，329，4： | 1 |
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