Spatial relationship between ?15N and elevation in agricultural landscapes (2008)
Biswas, A., Si, B. C., Walley, F. L.
Understanding of the nitrogen (N) cycle and its spatial variability is important for managing ecosystems. Soil ?15N, as an important indicator of different soil nitrogen cycling processes, may...
Spatial relationship between ?15N and elevation in agricultural landscapes (2008)
Biswas, A., Si, B. C., Walley, F. L.
Understanding of the nitrogen (N) cycle and its spatial variability is important for managing ecosystems. Soil ?15N, as an important indicator of different soil nitrogen cycling processes, may...
Advances in perceptual stereo audio coding using linear prediction techniques (2007)
Doctoral degree 15-05-2007; Department of Electrical Engineering; Supervisors: R.J. Sluijter and A.G. Kohlrausch; Co-promotor: A.C. den Brinker
Srinivasan, M., Madden-Woods, B., Hamkins, J., Biswas, A.
Two commercially available large area silicon avalanche photodiodes (APD) were characterized in the laboratory. Specifically, the response of the APD’s to a sequence of 8-bit pulse position...
Role of MTHFR C677T polymorphism in ischemic stroke (2006)
Panigrahi, I, Chatterjee, T, Biswas, A, Behari, M, Choudhry, PV, Saxena, R
Tiaintiaion Si3 N4 tandem absorber for high temperature solar selective applications (2006)
Barshilia, Harish C, Selvakumar, N, Rajam, KS, Rao, Sridhara DV, Muraleedharan, K, Biswas, A
A tandem absorber of Titainion Si3 N4 is prepared using a magnetron sputtering process. The graded composition of the individual component layers of the tandem absorber produces a film with a...
Deep space optical communications link availability and data volume (2005)
Biswas, A., Wilson, K. E., Piazzolla, S., Wu, J., Farr, W. H.
Optical links from a spacecraft at planetary distance to a ground-based receiver presume a cloud free line of site (CFLOS). Future ground-based optical reeiving networks, should they be implemented,...
MLCD: overview of NASA's Mars laser communications demonstration system (2005)
Boroson, D. M., Biswas, A., Edwards, B. L.
NASA is presently overseeing a project to create the world's first free-space laser communications system that can be operated over a range much larger than the near-earth ranges that have been...
Overview of the Mars Laser Communications Demonstration Project (2004)
Edwards, B. L., Townes, S. A., Bondurant, R. S., Boroson, D. M., Parvin, B. A., Biswas, A., ...
Effect of Aperture Averaging on a 570 Mbps 42 km Horizontal Path Optical Link (2004)
Optical communications offers high data rate satellite to ground communications in a small, low mass, and low power consumption package.
Removal of Residual Chromium from Aluminum Oxide by Containerless Liquid-phase Processing (2004)
Biswas, A., Weber, J., Nordine, P.
Berneuil sapphire was purified of Cr3+ by containerless melting and processing at ca. 2550 K in high purity argon, dry air and pure oxygen. Recovered material was examined by laser induced...
Solidification of Ultrasonically Levitated o-Terphenyl Crystals: A Raman Study (2004)
Ultrasonic levitation of millimeter size 0-terphenyl crystals was carried out in a variable tempeature enclosure. The trapped crystals were melted (m.p.=331 K), undercooled and then seeded in order...
The Lasercom Test and Evaluation Station for Flight Terminal Evaluation (2004)
Wilson, K. E., Page, N., Biswas, A., Hemmati, H., Masters, K., Erickson, D., ...
Recent successful demonstrations of laser communications with spacecraft and Earth-orbiting satellites have demonstrated the feasibility of some of the key aspects of this technology.
Optical Communication Demonstration and High-Rate Link Facility (2004)
Sandusky, J., Jeganathan, M., Ortiz, G., Biswas, A., Lee, S., Wilson, K., ...
Optical Communication Demonstration and High-Rate Link Facility (2004)
Sandusky, J., Jeganathan, M., Ortiz, G., Biswas, A., Lee, S., Wilson, K., ...
Motivated by demands for faster, better, cheaper spacecraft, NASA is developing deep-space optical communication technology which promises reduced mass, volume, and power consumption compared to...
Laser Technologies for Deep Space Optical Communications (2004)
Wright, M., Wilson, K., Biswas, A., Ortiz, G.
Introduction to free space optical communications.
Lasercom Test and Evaluation Station (LTES) Development: an update (2004)
Biswas, A., Wilson, K., Page, N.
Pre-launch integrated system characterization of a lasercom terminal's (LCT's) communications and acquisition/tracking subsystems can provide a quantitative evaluation of the terminal and afford a...
Results of the STRV-2 Lasercom Terminal Evaluation Tests (2004)
Biswas, A., Williams, G., Wilson, K. E., Hakakha, H., Steiger, R., Korevaar, E.
The STRV-2 lasercom terminal (LCT) was designed and developed by AstroTerra Corporation of San Diego, California, under funding from the Ballistic Missile Defense Organization (BMDO). Scheduled for...
Multi-gigabit data-rate optical communication depicting LEO-to-GEO and GEO-to-Ground links (2004)
Hemmati, H., Wright, M., Sanii, B., Page, N., Biswas, A., Wilson, K.
The goal is to develop key components for a technology that will enable optical communications to meet the data delivery requirements of the EOS (Earth Observing Spacecraft) community.
High-efficiency pulsed laser transmitters for deep-space communication (2004)
Hemmati, H., Wright, M., Biswas, A., Esproles, C.
Highly efficient laser sources are required for deep space optical telecommunication. This paper investigates the efficiency components for pulsed diode pumped solid state laser transmittersand...
Design of the Opto-electronic Receiver for Deep Space Optical Communications (2004)
Ortiz, G., Sandusky, J., Biswas, A.
The opto-electronic receiver (detector and pre-amplifier) necessary to meet the demands of high capacity deep space missions is designed for a Mars-Earth optical communication link.
Lessons Learnt from the Optical Communications Demonstrator (OCD) (2004)
Jeganathan, M., Portillo, A., Racho, C., Lee, S., Erickson, D., DePew, J., ...
The Optical Communications Demonstrator (OCD) is a laboratory based lasercom terminal that was developed to validate several key technologies such as precision beam pointing, high bandwidth beacon...
45 Km Horizontal Path Optical Link Experiment (2004)
Biswas, A., Ceniceros, J., Novak, M., Jeganathan, M., Portillo, A., Erickson, D., ...
Mountain-top to mountain-top optical link experiments have been initiated at JPL, in order to perform a systems level evaluation of optical communications.
Sandusky, J., Jeganathan, M., Ortiz, G., Biswas, A., Lee, S., Parker, G., ...
This paper presents an overview of the preliminary design of both the flight and ground systems of the Optical Communication Demonstration and High-Rate Link Facility which will demonstrate optical...
Pulse position modulated ground receiver design for optical communications from deep space (2004)
Biswas, A., Vilnrotter, V., Farr, W., Fort, D., Sigman, E.
In the present report, requirements and design of a prototype PPM receiver being designed for development over the next year will be elaborated.
Ground detectors for optical communications from deep space (2004)
Biswas, A., Madden-Woods, B., Srinivasan, M., Vilnrotter, V., Farr, W.
A variety of avalanche photodiodes were tested with pulse position modulated Q-switched laser pulses incident on the detector, with varying amounts of attenuation.
Multi-gigabit data-rate optical communication depicting LEO-to-GEO and GEO-to-Ground Links (2004)
Hemmati, H., Wright, M., Sanii, B., Page, N., Ortiz, G. G., Biswas, A., ...
Communication links with multi-gga-bits per sec (Gbps) data-rates depicting both LEO-GEO and GEO-to-Ground optical communications were characterized in the laboratory.
Ortiz, G. G., Lee, S., Monacos, S., Wright, M., Biswas, A.
A robust acquisition, tracking and pointing (ATP) subsystem is being developed for the 2.5 Gigabit per second (Gbps) Unmanned-Aerial-Vehicle (UAV) to ground free-space optical communications link...
Origin of the anomalous low temperature upturn in resistivity in the electron-doped cuprates (2004)
Dagan, Y., Biswas, A., Barr, M. C., Fisher, W. M., Greene, R. L.
The temperature, doping and field dependences of the magnetoresistance (MR) in Pr_(2-x)Ce_(x)CuO_(4-delta) films are reported. We distinguish between orbital MR, found when the magnetic field is...
First-order nature of the ferromagnetic phase transition in (La-Ca)MnO_3 near optimal doping (2003)
Adams, C. P., Lynn, J. W., Smolyaninova, V. N., Biswas, A., Greene, R. L., Ratcliff II, W., ...
Neutron scattering has been used to study the nature of the ferromagnetic transition in single crystals of La_0.7Ca_0.3MnO_3 and La_0.8Ca_0.2MnO_3, and polycrystalline samples of La_0.67Ca_0.33MnO_3...
Substrate-induced strain effects on Pr_{0.6}Ca_{0.4}MnO_{3} films (2003)
Nelson, C. S., Hill, J. P., Gibbs, Doon, Rajeswari, M., Biswas, A., Shinde, S., ...
We report the characterization of the crystal structure, low-temperature charge and orbital ordering, transport, and magnetization of Pr_{0.6}Ca_{0.4}MnO_{3} films grown on LaAlO_{3}, NdGaO_{3}, and...
Plasmodium vivax and hepatitis E co-infection--a rare cause of malarial jaundice. (2002)
Bansal, R, Kadhiravan, T, Aggarwal, P, Handa, R, Biswas, A, Wali, JP
Shinde, S. R., Ogale, S. B., Biswas, A., Greene, R. L., Venkatesan, T.
A large anisotropy in the upper critical field (H$_{C2}$) is observed for MgB$_{2}$ films grown in situ by a pulsed laser deposition process involving growth and annealing of Mg and B multilayers....
Stimulated Raman Scattering in Micrometer-Sized Droplets: Time-Resolved Measurements, (1998)
Biswas, A., Chylek, P., Armstrong, R. L., Latifi, H., Creegan, E.
Time resolved measurements of elastic scattering and stimulated Raman scattering (SRS) in micrometer sized water and carbon tetrachloride droplets irradiated with a pulsed, frequency doubled Nd:YAG...
Self-Propagating High-Temperature Synthesis of Titanium Borides. (1998)
Roy, S. K., Biswas, A., Banerjee, S.
The application of self-propagating high-temperature synthesis (SHS) to prepare a few borides of titanium was investigated. Using the plane wave propagation mode, the synthesis of titanium borides in...
Combustion Synthesis of TiB and TiB2 Under Vacuum. (1998)
This letter describes the results of the synthesis of titanium monoboride and diboride by combustion synthesis in vacuum using plane wave propagation. Titanium borides were chosen because of the...
Self-Propagating High-Temperature Synthesis of Titanium Borides. (1998)
Roy, S. K., Biswas, A., Banerjee, S.
The application of self-propagating high-temperature synthesis (SHS) to prepare a few borides of titanium was investigated. Using the plane wave propagation mode, the synthesis of titanium borides in...
Lead poisoning in a schizophrenic. (1998)
Handa, R, Aggarwal, P, Biswas, A, Wig, N, Mohan, A, Chaturvedi, V, ...
Biswas, A, Raychaudhuri, AK, Arulraj, A, Rao, CNR
We report here the results of vacuum tunneling spectroscopy of race-earth manganates which show colossal magnetoresistance (CMR) and charge ordering (CO). Three samples with different hole...
Biswas, A, Raychaudhuri, AK, Arulraj, A, Rao, CNR
We report here the results of vacuum tunneling spectroscopy of race-earth manganates which show colossal magnetoresistance (CMR) and charge ordering (CO). Three samples with different hole...
Analysis and design of (LC)(LC)-type series-parallel resonant converter (1995)
Bhat, AKS, Biswas, A, Iyengar, BSR
A series-parallel resonant converter employing (LC)(LC)-type tank circuit operating in lagging power factor (PF) mode is presented and analyzed using complex ac circuit analysis. Design curves are...
Analysis and design of (LC)(LC)-type series-parallel resonant converter (1995)
Bhat, AKS, Biswas, A, Iyengar, BSR
A series-parallel resonant converter employing (LC)(LC)-type tank circuit operating in lagging power factor (PF) mode is presented and analyzed using complex ac circuit analysis. Design curves are...
Ray, B C, Biswas, A, Sinha, P K
Copyright for this article belongs to Kluwer DOI: 10.1007/BF00731120
Hygrothermal Effects on the Mechanical Behaviour of Fiber Reinforced Polymeric Composites (1991)
Ray, B C, Biswas, A, Sinha, P K
Copyright for this article belongs to Meshap Science Publishers, Bombay, India
On the Evaluation of Interlaminalr Shear - A Critical Design Parameter (1989)
Ray, B C, Biswas, A, Sinha, P K
Copyright belongs to ISAMPE, HAL, The Institution of Engineers, India
Ray, B C, Biswas, A, Sinha, P K
Copyright for this article belongs to proceedings publisher
LASER ASSISTED SURFACE MODIFICATION OF Tiâ6Alâ4V FOR BIOIMPLANT APPLICATION
A. BISWAS, U. K. CHATTERJEE, LIN LI, I. MANNA, J. DUTTA MAJUMDAR
The present study aims at enhancing the wear resistance of Tiâ6Alâ4V by laser surface nitriding. Laser surface treatment has been carried out by melting of the sand blasted Tiâ6Alâ4V substrate...
SURFACE OXIDATION OF Ti-6Al-4V FOR BIO-IMPLANT APPLICATION
A. BISWAS, U. BHATTACHARJEE, I. MANNA, J. DUTTA MAJUMDAR
The present study aims at enhancing the wear resistance and biocompatibility of Ti-6Al-4V by forming a thin layer of oxide. Surface oxidation has been carried out by controlled heating of the surface...