Chakraborty, A., Nanjundiah, R. S., Srinivasan, J.
A theory is proposed to determine the onset of the Indian Summer Monsoon (ISM) in an Atmospheric General Circulation Model (AGCM). The onset of ISM is delayed substantially in the absence of global...
Chakraborty, A., Satheesh, S. K., Nanjundiah, R. S., Srinivasan, J.
The impact of anthropogenic absorbing aerosols (such as soot) on the climate over the Indian region has been studied using the NCMRWF general circulation model. The absorbing aerosols increase...
Chakraborty, A., Nanjundiah, R. S., Srinivasan, J.
A theory is proposed to determine the onset of the Indian Summer Monsoon (ISM) in an Atmospheric General Circulation Model (AGCM). The onset of ISM is delayed substantially in the absence of global...
Chakraborty, A., Satheesh, S. K., Nanjundiah, R. S., Srinivasan, J.
The impact of anthropogenic absorbing aerosols (such as soot) on the climate over the Indian region has been studied using the NCMRWF general circulation model. The absorbing aerosols increase...
Mortality pattern of hospitalized children in a tertiary care hospital of Kolkata (2008)
Roy, RN, Nandy, S, Shrivastava, P, Chakraborty, A, Dasgupta, M, Kundu, TK
Level Structure of 103Ag at high spins (2007)
Ray, S., Pattabiraman, N. S., Chakraborty, A., Mukhopadhyay, S., Ghugre, S. S., ...
High spin states in $^{103}$Ag were investigated with the Gammasphere array, using the $^{72}$Ge($^{35}$Cl,$2p2n$)$^{103}$Ag reaction at an incident beam energy of 135 MeV. A $\Delta J$=1 sequence...
High-spin structure and Band Termination in $^{103}$Cd (2007)
Chakraborty, A., Mukhopadhyay, S., Ray, S., Chintalapudi, S. N., Ghugre, S. S., ...
Excited states of the neutron deficient $^{103}$Cd nucleus have been investigated via the $^{72}$Ge($^{35}$Cl, p3n) reaction at beam energy of 135 MeV by use of in-beam spectroscopic methods. Gamma...
Raj, S, Matsui, H, Souma, S, Sato, T, Takahashi, T, Chakraborty, A, ...
The electronic structure of sodium tungsten bronzes, $Na_xWO_3$, for full range of x is investigated by high resolution angle-resolved photoemission spectroscopy (HR-ARPES). The experimentally...
Raj, S, Hashimoto, D, Matsui, H, Souma, S, Sato, T, Takahashi, T, ...
We report high-resolution angle-resolved photoemission spectroscopy on sodium tungsten bronzes, $NaxWO_3$, which exhibit a metal–insulator transition as a function of x. We found that the...
Chakraborty, A., Sain, M. M., Kortschot, M. T., Ghosh, S. B.
The objective of this paper is to model the energy consumed in generating cellulose microfibres, 1 μm in diameter, as reinforcing agents, by refining bleached softwood kraft pulp in a PFI mill. An...
Raj, S, Matsui, H, Souma, S, Sato, T, Takahashi, T, Chakraborty, A, ...
The electronic structure of sodium tungsten bronzes, $Na_xWO_3$, for full range of x is investigated by high resolution angle-resolved photoemission spectroscopy (HR-ARPES). The experimentally...
Raj, S, Hashimoto, D, Matsui, H, Souma, S, Sato, T, Takahashi, T, ...
We report high-resolution angle-resolved photoemission spectroscopy on sodium tungsten bronzes, $NaxWO_3$, which exhibit a metal–insulator transition as a function of x. We found that the...
BIRTH OF NEW VIBRATIONAL MODES IN BIFURCATIONS OF HIGHLY EXCITED NORMAL MODES (2007)
Kellman, M. E., Tyng, V., Chakraborty, A.
Author Institution: University of Oregon, Department of Chemistry, Eugene, Oregon, USA
SPECTRAL SIGNATURES OF NEW MODES BORN IN BIFURCATIONS OF HIGHLY EXCITED NORMAL MODES (2007)
Kellman, M. E., Tyng, V., Chakraborty, A.
Author Institution: University of Oregon, Department of Chemistry, Eugene, Oregon, USA
Armstrong, A, Chakraborty, A, Speck, J S, DenBaars, S P, Mishra, U K, Ringel, S A
Deep levels were observed using capacitance deep level optical spectroscopy (DLOS) in an AlGaN/GaN heterostructure equivalent to that of a heterojunction field effect transistor. Band gap states were...
Saha, BB, El-Sharkawy, II, Chakraborty, A, Koyama, S, Banker, ND, Dutta, P, ...
The purpose of this paper is to identify the minimum desorption temperatures required to operate thermally driven adsorption beds of a solid sorption refrigeration system. The method is based on the...
Chakraborty, A, Nanjundiah, RS, Srinivasan, J
A theory is proposed to determine the onset of the Indian Summer Monsoon (ISM) in an Atmospheric General Circulation Model (AGCM). The onset of ISM is delayed substantially in the absence of global...
Koyama, T, Onuma, T, Masui, H, Chakraborty, A, Haskell, B A, Keller, S, ...
Prospective equivalent internal quantum efficiency (eta(int)) of approximately 34% at 300 K was demonstrated for the blue emission peak of nonpolar m-plane (1 (1) over bar 00) InxGa1-xN/GaN multiple...
A Spectral Finite Element Model for Wave Propagation Analysis in Laminated Composite Plate (2006)
Chakraborty, A, Gopalakrishnan, S
A new spectral plate element (SPE) is developed to analyze wave propagation in anisotropic laminated composite media. The element is based on the first-order laminated plate theory, which takes shear...
Defect reduction in nonpolar a-plane GaN films using in situ SiNx nanomask (2006)
Chakraborty, A, Kim, K C, Wu, F, Speck, J S, DenBaars, S P, Mishra, U K
We report on the use of in-situ SiNx nanomask for defect reduction in nonpolar a-plane GaN films, grown by metal-organic chemical vapor deposition. High-resolution x-ray diffraction analysis revealed...
Recht, F, McCarthy, L, Rajan, S, Chakraborty, A, Poblenz, C, Corrion, A, ...
This letter reports AlGaN/GaN high-electron mobility transistors with capless activation annealing of implanted Si for nonalloyed ohmic contacts. Source and drain areas were implanted with an Si dose...
Unpassivated high power deeply recessed GaNHEMTs with fluorine-plasma surface treatment (2006)
Shen, L, Palacios, T, Poblenz, C, Corrion, A, Chakraborty, A, Fichtenbaum, N, ...
In this letter, unpassivated high power deeply recessed GaN-based high electron mobility transistors (HEMTs) are reported. The introduction of a thick graded AlGaN cap layer and a novel...
Spectral element based model for wave propagation analysis in multi-wall carbon nanotubes (2006)
Chakraborty, A, Sivakumar, MS, Gopalakrishnan, S
A spectrally formulated finite element is developed to study elastic waves in carbon nanotubes (CNT), where the frequency content of the exciting signal is at terahertz level. A multi-walled nanotube...
Agarwal, S, Chakraborty, A, Gopalakrishnan, S
The existing statically exact beam finite element (FE) based on the first order shear deformation theory (FSDT) is used to study the geometric nonlinear effects on static and dynamic responses in...
Spectral element based model for wave propagation analysis in multi-wall carbon nanotubes (2006)
Chakraborty, A, Sivakumar, MS, Gopalakrishnan, S
A spectrally formulated finite element is developed to study elastic waves in carbon nanotubes (CNT), where the frequency content of the exciting signal is at terahertz level. A multi-walled nanotube...
Agarwal, S, Chakraborty, A, Gopalakrishnan, S
The existing statically exact beam finite element (FE) based on the first order shear deformation theory (FSDT) is used to study the geometric nonlinear effects on static and dynamic responses in...
A Spectral Finite Element Model for Wave Propagation Analysis in Laminated Composite Plate (2006)
Chakraborty, A, Gopalakrishnan, S
A new spectral plate element (SPE) is developed to analyze wave propagation in anisotropic laminated composite media. The element is based on the first-order laminated plate theory, which takes shear...
Saha, BB, El-Sharkawy, II, Chakraborty, A, Koyama, S, Banker, ND, Dutta, P, ...
The purpose of this paper is to identify the minimum desorption temperatures required to operate thermally driven adsorption beds of a solid sorption refrigeration system. The method is based on the...
Chakraborty, A, Nanjundiah, RS, Srinivasan, J
A theory is proposed to determine the onset of the Indian Summer Monsoon (ISM) in an Atmospheric General Circulation Model (AGCM). The onset of ISM is delayed substantially in the absence of global...
High-power AlGaN/GaN HEMTs for Ka-band applications (2005)
Palacios, T, Chakraborty, A, Rajan, S, Poblenz, C, Keller, S, DenBaars, S P, ...
We report on the fabrication and high-frequency characterization of AlGaN/GaN high-electron mobility transistors (HEMTs) grown by molecular beam epitaxy (MBE) and metal-organic chemical vapor...
Raj, S, Hashimoto, D, Matsui, H, Souma, S, Sato, T, Takahashi, T, ...
We have carried out high-resolution angle-resolved photoemission spectroscopy (ARPES) to study the electronic structure of highly metallic $Na_{x}WO_{3}$ (x=0.58, 0.65, 0.7, and 0.8). The...
Chakraborty, A, Gopalakrishnan, S
A new spectral element ( SE) is formulated to analyse wave propagation in anisotropic in homogeneous beam. The in homogeneity is considered in the longitudinal direction. Due to this particular...
A spectrally formulated plate element for wave propagation analysis in anisotropic material (2005)
Chakraborty, A, Gopalakrishnan, S
A new spectrally formulated plate element is developed to study wave propagation in composite structures. The element is based on the classical lamination plate theory. Recently developed method...
Raj, S, Hashimoto, D, Matsui, H, Souma, S, Sato, T, Takahashi, T, ...
We have carried out high-resolution angle-resolved photoemission spectroscopy (ARPES) to study the electronic structure of highly metallic $Na_{x}WO_{3}$ (x=0.58, 0.65, 0.7, and 0.8). The...
Chakraborty, A, Gopalakrishnan, S
A new spectral element ( SE) is formulated to analyse wave propagation in anisotropic in homogeneous beam. The in homogeneity is considered in the longitudinal direction. Due to this particular...
Wave propagation analysis in inhomogeneous piezo-composite layer by the thin-layer method (2005)
Chakraborty, A, Gopalakrishnan, S, Kausel, E
The thin-layer method (TLM) is used to study the propagation of waves in inhomogeneous piezocomposite layered media caused by mechanical loading and electrical excitation. The element is formulated...
A spectrally formulated plate element for wave propagation analysis in anisotropic material (2005)
Chakraborty, A, Gopalakrishnan, S
A new spectrally formulated plate element is developed to study wave propagation in composite structures. The element is based on the classical lamination plate theory. Recently developed method...
Wave propagation analysis in inhomogeneous piezo-composite layer by the thin-layer method (2005)
Chakraborty, A, Gopalakrishnan, S, Kausel, E
The thin-layer method (TLM) is used to study the propagation of waves in inhomogeneous piezocomposite layered media caused by mechanical loading and electrical excitation. The element is formulated...
Chakraborty, A., Devi, R.K.B., Rita, S., Sharatchandra, Kh, Singh, ThI
OBJECTIVE: To evaluate the antiinflammatory and analgesic activities of the aqueous extract of Spilanthes acmella (SPA) in experimental animal models. MATERIAL AND METHODS: SPA was evaluated for...
Chakraborty, A., Devi, R.K.B., Rita, S., Sharatchandra, Kh, Singh, ThI
OBJECTIVE: To evaluate the antiinflammatory and analgesic activities of the aqueous extract of Spilanthes acmella (SPA) in experimental animal models. MATERIAL AND METHODS: SPA was evaluated for...
Chakraborty, A, Devi, RKB, Rita, S, Sharatchandra, Kh, Singh, ThI
OBJECTIVE: To evaluate the antiinflammatory and analgesic activities of the aqueous extract of Spilanthes acmella (SPA) in experimental animal models. MATERIAL AND METHODS: SPA was evaluated for...
Wave propagation in inhomogeneous layered media: solution of forward and inverse problems (2004)
Chakraborty, A, Gopalakrishnan, S
Wave propagation in anisotropic inhomogeneous layered media due to high frequency impact loading is studied using a new Spectral Layer Element (SLE). The element can model functionally graded...
Detection of Knots and Jets in IRAS 06061+2151 (2004)
Anandarao, B. G., Chakraborty, A., Ojha, D. K., Testi, L.
We report detection of a Young Stellar Object with an evidence for an outflow in the form of knots in the molecular hydrogen emission line (2.121 micron) towards the massive star forming region IRAS...
Craven, M D, Wu, F, Chakraborty, A, Imer, B, Mishra, U K, DenBaars, S P, ...
This letter describes the relationship between the morphological evolution of heteroepitaxial a-plane GaN films and the formation of the extended defect structure. The initial a-plane GaN growth on...
Wave propagation in inhomogeneous layered media: solution of forward and inverse problems (2004)
Chakraborty, A, Gopalakrishnan, S
Wave propagation in anisotropic inhomogeneous layered media due to high frequency impact loading is studied using a new Spectral Layer Element (SLE). The element can model functionally graded...
Spectrum and clinical profile of post cataract surgery endophthalmitis in North India (2003)
Gupta, A, Gupta, V, Gupta, A, Dogra, MR, Pandav, SS, Ray, P, ...
Chakraborty, A, Gopalakrishnan, S
In this paper, spectral finite element method is employed to analyse the wave propagation behavior in a functionally graded (FG) beam subjected to high frequency impulse loading, which can be either...
Utilisation of deep venous thrombosis prophylaxis in medical / surgical intensive care units (2003)
Todi, S, Sinha, S, Chakraborty, A, Sarkar, A, Gupta, S, Das, T, ...
Trebble, T.M., Wootton, S.A., May, A., Chakraborty, A., Mullee, M.A., ...
Background: Active paediatric Crohn's disease is associated with nutritional deficiencies and altered nutrient intake. The availability of essential fatty acids (linoleic and α-linolenic acids) or...
Chakraborty, A, Gopalakrishnan, S
In this paper, spectral finite element method is employed to analyse the wave propagation behavior in a functionally graded (FG) beam subjected to high frequency impulse loading, which can be either...
Trebble, T.M., Wootton, S.A., May, A., Erlewyn-Lajeunesse, M.D., Chakraborty, A., Mullee, M.A., ...
BACKGROUND: Active paediatric Crohn's disease is associated with nutritional deficiencies and altered nutrient intake. The availability of essential fatty acids (linoleic and alpha-linolenic acids)...
Role of Asian and African orography in Indian summer monsoon (2002)
Chakraborty, A, Nanjundiah, RS, Srinivasan, J
Role of Asian and African orography in the Indian summer monsoon has been investigated using a general circulation model. Orography of Asian region west of 80°E appears to have more impact on the...
First High Contrast Imaging Using a Gaussian Aperture Pupil Mask (2002)
Debes, J. H., Ge, J., Chakraborty, A.
Placing a pupil mask with a gaussian aperture into the optical train of current telescopes represents a way to attain high contrast imaging that potentially improves contrast by orders of magnitude...
Nature of Faint Companions to G type Stars using Adaptive Optics (2002)
Chakraborty, A., Ge, J., Debes, J. H.
High spatial resolution (0.30 arcsec) NIR photometric observations using the adaptive optics of the 100 inch Mt. Wilson Telescope and the Penn State IR Imager and Spectrograph (PIRIS) have revealed...
Chakraborty, A, Mahapatra, Roy D, Gopalakrishnan, S
A new refined locking free first-order shear deformable finite element is presented, and its utility in solving free vibration and wave propagation problems in laminated composite beam structures...
Role of Asian and African orography in Indian summer monsoon (2002)
Chakraborty, A, Nanjundiah, RS, Srinivasan, J
Role of Asian and African orography in the Indian summer monsoon has been investigated using a general circulation model. Orography of Asian region west of 80°E appears to have more impact on the...
Chakraborty, A, Mahapatra, Roy D, Gopalakrishnan, S
A new refined locking free first-order shear deformable finite element is presented, and its utility in solving free vibration and wave propagation problems in laminated composite beam structures...
Chakraborty, A., Ojha, D. K., Anandarao, B. G., Rengarajan, T. N.
Near-infrared photometry and narrow/broad-band imaging of the massive and luminous young stellar object IRAS 05361+3539 are presented. Imaging observations were made at Mt. Abu while the photometric...
The Effect of Processing Parameters on the Mechanical Properties of Al2O3/SiC(w) Composites. (1998)
Chakraborty, A., Bhaduri, S. B., Reddy, J. J., Mahajan, Y. R.
Al2O3/SiC(sub w) composites were fabricated by incorporating 5 and 20 mass% silicon carbide whiskers (SiC(sub w)) in the alumina (Al2O3) matrix. The processing route involved the following steps:...