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541 results on '"Sharma, Tonmoy"'

5. An Overall Discussion Mach-5 Spacecraft And Flight Dynamics Working Mechanics

Author

Tonoy Sharma Tonmoy

Abstract

Theoretical With the ability of fast flying, an increasingly dependable and cost efficient approach to get to space is given by hypersonic flight vehicles. Controller configuration, as key innovation to make hypersonic flight achievable and efficient, has various difficulties originating from huge flight envelope with outrageous scope of activity conditions, solid collaborations between flexible airframe, the impetus framework and the basic elements. This paper briefly presents a few ordinarily considered hypersonic flight elements, for example, winged-cone model, truth model, bend fitted model, control situated model and reemergence movement. Taking into account different plans, for example, linear zing at the trim state, input-yield linearization, trademark displaying, and backventuring, the ongoing exploration on hypersonic flight control is looked into and the correlation is introduced. Flight dynamic characteristics are crucial in aircraft design. Simulation tools evaluate the aircraft statically and dynamical stability and maneuverability usually are based on a previously computed tabular aerodynamic model.To show the difficulties for hypersonic flight control, some specific qualities of hypersonic flight are talked about and the potential future research is tended to with managing actuator elements, streamlined/response fly control, flexible effect, non-least stage issue and elements association. A new model is developed to more accurately capture the dynamics and control of an air-breathing hypersonic vehicle using a computationally inexpensive formulation. The vehicle model integrates a scramjet engine analysis tool developed specifically for use in a controloriented model and a six-degree-of-freedom rigid-body flight dynamics model. The combined hypersonic vehicle model requires less than ten seconds with a single 2.6 GHz processor to calculate the total thrust, lift, and aerodynamic moment on the vehicle. The inlet and nozzle analysis handles shock-shock and shock-expansion interactions, and expansions are considered to be a series of discrete waves. The combustor model utilizes scaling laws that retain some of the fidelity of higherorder simulations. On the parts of the vehicle that are not part of the propulsive flowpath, modified shock-expansion theory is used to calculate the pressure. In this approach the role of the propulsive model will be only to calculate the net forces and moments on the inlet, combustor, and nozzle. The result is a control-oriented hypersonic vehicle model that qualitatively captures the nonlinear interactions between vehicle dynamics and the scramjet engine.

Published
2022
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13. Effect of ispronicline, a neuronal nicotinic acetylcholine receptor partial agonist, in subjects with age associated memory impairment (AAMI)

Author

Dunbar, Geoffrey C., Inglis, Fraser, Kuchibhatla, Ramana, Sharma, Tonmoy, Tomlinson, Mark, and Wamsley, James

Subjects
Cognition -- Research -- Health aspects, Memory disorders in old age -- Research -- Drug therapy -- Complications and side effects, Nicotinic receptors -- Complications and side effects -- Health aspects -- Research, Pharmaceuticals and cosmetics industries, Psychology and mental health, Drug therapy, Complications and side effects, Research, Health aspects
Abstract

Abstract Cognitive decline seen in the normal elderly is associated with selective loss of neuronal nicotinic acetylcholine receptors (nAChRs). Nicotine given either by inhalation or transdermally helps cognition, but unacceptable [...]

Published
2007

15. Antipsychotic drug effects on brain morphology in first-episode psychosis

Author

Lieberman, Jeffrey A., Tollefson, Gary D., Charles, Cecil, Zipursky, Robert, Sharma, Tonmoy, Kahn, Rene S., Keefe, Richard S. E., Green, Alan I., Gur, Raquel E., McEvoy, Joseph, Perkins, Diana, Hamer, Robert M., Gu, Hongbin, Tohen, Mauricio, and HGDH Study Group

Subjects
Psychoses -- Research, Psychoses -- Drug therapy, Psychoses -- Patient outcomes, Olanzapine -- Dosage and administration, Olanzapine -- Patient outcomes, Haloperidol -- Dosage and administration, Haloperidol -- Research, Antipsychotic drugs -- Research, Antipsychotic drugs -- Patient outcomes, Schizophrenia, Brain research, Health, Psychology and mental health
Published
2005

34. Insight in first-episode psychosis

Author

MCEVOY, JOSEPH P., JOHNSON, JACKIE, PERKINS, DIANA, LIEBERMAN, JEFFREY A., HAMER, ROBERT M., E. KEEFE, RICHARD S., TOHEN, MAURICIO, GLICK, IRA D., and SHARMA, TONMOY

Published
2006

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