Mittal, R., Heid, R., Bosak, A., Forrest, T. R., Chaplot, S. L., Lamago, D., ...
The pressure dependence of a large number of phonon modes in CaFe2As2 with energies covering the full range of the phonon spectrum has been studied using inelastic x-ray and neutron scattering. The...
Magnetic structure of EuFe2As2 determined by single crystal neutron diffraction (2009)
Xiao, Y., Su, Y., Meven, M., Mittal, R., Kumar, C. M. N., Chatterji, T., ...
Among various parent compounds of iron pnictide superconductors, EuFe2As2 stands out due to the presence of both spin density wave of Fe and antiferromagnetic ordering (AFM) of the localized Eu2+...
It is generally known that the orbital diamagnetism of a classical system of charged particles in thermal equilibrium is identically zero —the Bohr-van Leeuwen theorem. Physically, this null result...
Anomalous Phonons in CaFe2As2 (2009)
Mittal, R., Pintschovius, L., Lamago, D., Heid, R., Bohnen, K. P., Reznik, D., ...
Extensive inelastic neutron scattering measurements of phonons on a single crystal of CaFe2As2 allowed us to establish a fairly complete picture of phonon dispersions in the main symmetry directions....
Mondal, D., Singh, S. P., Kumar, N., Joshi, A., Sundar, S., Das, P., ...
Objective We sought to estimate visceral leishmaniasis (VL) burden in Bangladesh, India, and Nepal and document care-seeking behaviour for VL to provide baseline information for monitoring the VL...
Anomalous phonons in CaFe§2As§2 explored by inelastic neutron scattering. (2009)
Mittal, R., Pintschovius, L., Lamago, D., Heid, R., Bohnen, K.P., Reznik, D., ...
Internat.Conf.on Neutron Scattering (ICNS 2009), Knoxville, Tenn., May 3-7, 2009
Mittal, R., Pintschovius, L., Lamago, D., Heid, R., Bohnen, K.P., Reznik, D., ...
Physical Review Letters, 102(2009) S.217001/1-4
It is generally known that the orbital diamagnetism of a classical system of charged particles in thermal equilibrium is identically zero -- the Bohr-van Leeuwen theorem. Physically, this null result...
Mitra, P., Kumar, N., Samarth, N.
We report low temperature (0.05 K < T < 4 K) magnetotransport measurements in a disordered ferromagnetic semiconductor close to the metal-insulator transition, focusing on a series of (Ga,Mn)As...
Deflection of ultra-slow light by the Earth's gravity on laboratory length scale (2008)
Restricted Access. An open-access version is available at arXiv.org (one of the alternative locations)
Comment on 'Experimental evidence of zero forward scattering by magnetic spheres' (2008)
Open Access
Langevin dynamics in crossed magnetic and electric fields: Hall and diamagnetic fluctuations (2008)
Based on the classical Langevin equation, we have re-visited the problem of orbital motion of a charged particle in two dimensions for a normal magnetic field crossed with or without an in-plane...
VOGEL–FULCHER VISCOSITY LAW FOR GLASS–FORMING LIQUIDS: AN EFFECTIVE MEDIUM THEORY (2008)
A glass-forming liquid, as it is supercooled towards glass transition, shows ultra-slow dynamics which is diffusive and relaxational. This manifests in a super-Arrhenius rise of shear viscosity...
Krajewski, R., Kujawinska, M., Wissmann, M., Kumar, N., Thienpont, H.
Technical Digest of the 14th Microoptics Conf., Bruxelles, B, September 25-27, 2008
Deflection of Ultra Slow Light by Earth Gravity on Laboratory Length Scale (2007)
The high speed of light in vacuo together with the weakness of Earth gravity rules out any experimental detection of gravitational deflection of light on the laboratory length scale. Recent advances...
Deflection of ultra slow light under gravity (2007)
Recent experiments on ultra slow light in strongly dispersive media by several research groups reporting slowing down of the optical pulses down to speeds of a few metres per second encourage us to...
Decohering d-dimensional quantum resistance (2007)
The Landauer scattering approach to 4-probe resistance is revisited for the case of a d-dimensional disordered resistor in the presence of decoherence. Our treatment is based on an...
Resistance without resistors: An anomaly (2007)
The elementary 2-terminal network consisting of a resistively ($R-$) shunted inductance ($L$) in series with a capacitatively ($C-$) shunted resistance ($R$) with $R = \sqrt{L/C}$, is known for its...
The TACTIC atmospheric Cherenkov Imaging telescope (2007)
Koul, R., Tickoo, A. K., Kaul, S. K., Kaul, S. R., Kumar, N., Yadav, K. K., ...
The TACTIC $\gamma$-ray telescope, equipped with a light collector of area $\sim$9.5m$^2$ and a medium resolution imaging camera of 349-pixels, has been in operation at Mt.Abu, India since 2001. This...
Random-phase reservoir and a quantum resistor: The Lloyd model (2007)
We introduce phase disorder in a 1D quantum resistor through the formal device of `fake channels' distributed uniformly over its length such that the out-coupled wave amplitude is re-injected back...
Venkataraman, Natarajan, and Kumar Reply (2007)
Venkataraman, V, Kumar, N, Natarajan, Vasant
In the earlier work [1] now under Comment, an increase was observed in the size of thermal fluctuations of a 3- micrometer polystyrene bead held in an optical tweezers trap, when the laser power was...
Venkataraman, Natarajan, and Kumar Reply (2007)
Venkataraman, V, Natarajan, Vasant, Kumar, N
In the earlier work [1] now under Comment, an increase was observed in the size of thermal fluctuations of a 3-micrometer polystyrene bead held in an optical tweezers trap, when the laser power was...
The recently observed (1) equipartition of current in parallel at and below the Normal-Superconducting (N-S) transition can be understood in terms of a Landau-Ginzburg order-parameter phenomenology....
Observational sickness assessment by the NICU staff nurses (2007)
James, J, Tiwari, L, Swahney, P, Srinivas, V, Francis, RM, Kumar, N
Manzoor, K, Aditya, V, Vadera, SR, Kumar, N, Kutty, TRN
A novel synthesis method is presented for the preparation of eco-friendly, doped semiconductor nanocrystals encapsulated within oxide-shells, both formed sequentially from a single-source...
Human herpesvirus 8 genoprevalence in populations at disparate risks of Kaposi's sarcoma (2007)
Kumar, N., McLean, K., Inoue, N., Moles, D.R., Scully, C., Porter, S.R., ...
The prevalence of human herpesvirus 8 (HHV-8) in populations at different risks of developing Kaposi's sarcoma (KS) was assessed using a protocol involving immunomagnetic fractionation of CD45+ blood...
Manzoor, K, Aditya, V, Vadera, SR, Kumar, N, Kutty, TRN
A novel synthesis method is presented for the preparation of eco-friendly, doped semiconductor nanocrystals encapsulated within oxide-shells, both formed sequentially from a single-source...
Venkataraman, Natarajan, and Kumar Reply (2007)
Venkataraman, V, Kumar, N, Natarajan, Vasant
In the earlier work [1] now under Comment, an increase was observed in the size of thermal fluctuations of a 3- micrometer polystyrene bead held in an optical tweezers trap, when the laser power was...
Venkataraman, Natarajan, and Kumar Reply (2007)
Venkataraman, V, Natarajan, Vasant, Kumar, N
In the earlier work [1] now under Comment, an increase was observed in the size of thermal fluctuations of a 3-micrometer polystyrene bead held in an optical tweezers trap, when the laser power was...
Spore release in Acrochaetium sp (Rhodophyta) is bacterially controlled (2007)
Weinberger, Florian, Beltran, J., Correa, Juan A., Lion, Ulrich, Pohnert, Georg, Kumar, N., ...
Kalinowski, DS, Yu, Y, Sharpe, PC, Islam, M, Liao, YT, Lovejoy, DB, ...
Previously, we demonstrated that the potent antiproliferative activity of the di-2-pyridylketone thiosemicarbazone (DpT) series of Fe chelators was due to their ability to induce Fe depletion and...
Kalinowski, D. S., Yu, Y., Sharpe, P. C., Islam, M., Liao, Y. T., Lovejoy, D. B., ...
Previously, we demonstrated that the potent antiproliferative activity of the di-2-pyridylketone thiosemicarbazone (DpT) series of Fe chelators was due to their ability to induce Fe depletion and...
Scalable E2E Framework for Heterogeneous (Wired-cumwireless) Networks (2007)
Next generation wireless networks aim to provide guaranteed Quality of Service (QoS) for multimedia applications. However, bandwidth is an extremely scarce resource in such networks that required an...
Ultrasensitive DNA sequence detection using nanoscale ZnO sensor arrays (2006)
We report that engineered nanoscale zinc oxide structures can be effectively used for the identification of the biothreat agent, Bacillus anthracis by successfully discriminating its DNA sequence...
Sharma, Divya, Ramachandran, Hema, Kumar, N.
Restricted Access
Manzoor, K, Aditya, V, Vadera, SR, Kumar, N, Kutty, TRN
Meso-scale self-assembly of doped semiconductor anocrystals leading to the formation of monocrystalline nanorods showing enhanced photo- and electro-luminescence properties are reported....
Sarangi, S., Chockalingam, S.P., Mavinkurve, R.G., Bhat, S.V., Kumar, N.
Restricted Access. An open-access version is available at arXiv.org (one of the alternative locations)
Manzoor, K, Aditya, V, Vadera, SR, Kumar, N, Kutty, TRN
Meso-scale self-assembly of doped semiconductor anocrystals leading to the formation of monocrystalline nanorods showing enhanced photo- and electro-luminescence properties are reported....
The possibility of a liquid superconductor (2006)
Edwards, P.P., Rao, C.N.R., Kumar, N., Alexandrov, A.S.
Restricted Access.
Evanescent-wave-excited quasi-two-dimensional random lasing (2006)
Mujumdar, Sushil, Ramachandran, Hema, Kumar, N, Sood, AK
We report on random lasing from a dye-scatterer system directly excited by evanescent modes formed over a dielectric-dielectric interface. The system is quasi-two-dimensional because of the...
Evanescent-wave-excited quasi-two-dimensional random lasing (2006)
Mujumdar, Sushil, Ramachandran, Hema, Kumar, N, Sood, AK
We report on random lasing from a dye-scatterer system directly excited by evanescent modes formed over a dielectric-dielectric interface. The system is quasi-two-dimensional because of the...
Sarangi, S., Chockalingam, S. P., Mavinkurve, Raghav G, Bhat, S. V., Kumar, N.
Our experiments show that for two or more pieces of a wire, of different lengths in general, combined in parallel and connected to a dc source, the current ratio evolves towards unity as the...
Supersolid and the non-uniform condensate (2005)
We construct a model of non-uniform condensate having a spatially modulated complex order parameter that makes it kinematically an x-ray solid, i.e., a real mass density wave, but one admitting an...
Manzoor, K, Aditya, V, Vadera, SR, Kumar, N, Kutty, TRN
Aggregation based meso-scale self-assembly of doped semiconductor nanocrystals leading to the formation of monocrystalline nanorodsshowing enhanced photo- and electro-luminescence properties...
Manzoor, K, Aditya, V, Vadera, SR, Kumar, N, Kutty, TRN
A natural self-assembly process of semiconductor nanoparticles leading to the formation of doped, monocrystalline nanorods with highly enhanced dopant-related luminescence properties is reported....
Dissipative electron–phonon system photo-excited far from equilibrium (2005)
Restricted Access.
Prospective evaluation of blunt abdominal trauma by computed tomography (2005)
Kumar, M, Venkataramanappa, M, Venkataratnam, I, Kumar, N, Babji, K
C-reactive protein in lower respiratory tract infections (2005)
Daga, MK, Arora, N, Prakash, SK, Jhamb, R, Kumar, N, Gupta, N
Levy statistical fluctuations from a Random Amplifying Medium (2005)
Sharma, Divya, Ramachandran, Hema, Kumar, N.
We report the studies of emission from a novel random amplifying medium that we term a ``Levy Laser'' due to the non-Gaussian statistical nature of its emission over the ensemble of random...
Dissipative electron-phonon system photoexcited far from equilibrium (2005)
We derive the steady-state electron distribution function for a semiconductor driven far from equilibrium by the inter-band photoexcitation assumed homogeneous over the nanoscale sample. Our...
Manzoor, K, Aditya, V, Vadera, SR, Kumar, N, Kutty, TRN
Aggregation based meso-scale self-assembly of doped semiconductor nanocrystals leading to the formation of monocrystalline nanorodsshowing enhanced photo- and electro-luminescence properties...
Manzoor, K, Aditya, V, Vadera, SR, Kumar, N, Kutty, TRN
A natural self-assembly process of semiconductor nanoparticles leading to the formation of doped, monocrystalline nanorods with highly enhanced dopant-related luminescence properties is reported....
Sarangi, S, Chockalingam, SP, Mavinkurve, Raghav G, Bhat, SV, Kumar, N
Our experiments show that for two or more pieces of different lengths of a wire combined in parallel and connected to a dc source, the current ratio evolves towards unity as the combination is cooled...
Sarangi, S, Chockalingam, SP, Mavinkurve, Raghav G, Bhat, SV, Kumar, N
Our experiments show that for two or more pieces of different lengths of a wire combined in parallel and connected to a dc source, the current ratio evolves towards unity as the combination is cooled...
N-acylated homoserine lactone (AHL) mediated cell-cell communication in bacteria is dependent on the recognition of the cognate signal by its receptor. This interaction allows the receptor-ligand...
A. Franks, P. Haywood, C. Holmström, S. Egan, S. Kjelleberg, N. Kumar
The marine environment is a major source for many novel natural compounds. A new yellow pigment has been isolated from the marine bacterium P. tunicata and identified as a new member of the...
FLOW DRIVEN ELECTRONIC TRANSPORT IN CARBON NANOTUBES. (2005)
Kumar, N, Ghosh, Shankar, Sood, A. K.
The flow of a liquid on single-walled carbon nanotube bundles induces an electrical signal (voltage/current) in the sample along the direction of the flow. The electrical response is found to be...
Quantum diffusion on a dynamically disordered and driven lattice with static bias (2004)
Restricted Access.
Random amplifying medium: Levy lasing (2004)
Sharma, Divya, Ramachandran, Hema, Kumar, N.
Restricted Access.
Flow-induced voltage and current generation in carbon nanotubes (2004)
Ghosh, Shankar, Sood, A.K., Ramaswamy, S., Kumar, N.
New experimental results, and a plausible theoretical understanding thereof, are presented for the flow-induced currents and voltages observed in single-walled carbon nanotube samples. In our...
Flow-induced voltage and current generation in carbon nanotubes (2004)
Ghosh, S., Sood, A. K., Ramaswamy, S., Kumar, N.
New experimental results, and a plausible theoretical understanding thereof, are presented for the flow-induced currents and voltages observed in single-walled carbon nanotube samples. In our...
Flow-induced voltage and current generation in carbon nanotubes (2004)
Ghosh, S, Sood, AK, Ramaswamy, S, Kumar, N
New experimental results, and a plausible theoretical understanding thereof, are presented for the flow-induced currents and voltages observed in single-walled carbon nanotube samples. In our...
Flow-induced voltage and current generation in carbon nanotubes (2004)
Ghosh, S., Sood, A. K., Ramaswamy, S., Kumar, N.
New experimental results, and a plausible theoretical understanding thereof, are presented for the flow-induced currents and voltages observed in single-walled carbon nanotube samples. In our...
Acute hyperventilation leading to hypocalcaemia during spinal anaesthesia: case report (2004)
Kumar, N, Podder, S, Sinha, T, Puri, GD
The most common cause of hypocalcaemia under general anaesthesia is acute mechanical hyperventilation, but hypocalcaemia during spinal anaesthesia has not been reported. This case report describes...
CS Lal, V Kumar, A Ranjan, VNR Das, N Kumar, K Kishore, ...
The manuscript describes a study on the blood cholinesterase (ChE) level in an exposed population at different interval of time after spraying with malathion suspension (SRES) use for kala-azar...
Lal,CS, Kumar,V, Ranjan,A, Das,VNR, Kumar,N, Kishore,K, ...
The manuscript describes a study on the blood cholinesterase (ChE) level in an exposed population at different interval of time after spraying with malathion suspension (SRES) use for kala-azar...
Lal, C. S., Kumar, V., Ranjan, A., Das, V. N. R., Kumar, N., Kishore, K., ...
The manuscript describes a study on the blood cholinesterase (ChE) level in an exposed population at different interval of time after spraying with malathion suspension (SRES) use for kala-azar...
Manzoor, K, Vadera, SR, Kumar, N, Kutty, TRN
Multi-colour emitting doped ZnS nanocrystals surface capped with pyridine (P-ZnS) or polyvinyl pyrrolidone (PVP-ZnS) have been synthesized by wet chemical methods. The photoluminescence studies show...
Evaluation of renal donors with helical CT angiography - our experience (2004)
Upendra, KN, Murty, P, Kumar, N, Reddy, R, ...
Multicolor electroluminescent devices using doped ZnS nanocrystals (2004)
Manzoor, K, Vadera, SR, Kumar, N, Kutty, TRN
Alternate-current electroluminescent (ac EL) devices based on doped ZnS nanocrystals emitting blue, green, and orange-red colors are reported. ZnS nanocrystals doped with Cu+ – Al3+ and Cu+ –...
Multicolor electroluminescent devices using doped ZnS nanocrystals (2004)
Manzoor, K, Vadera, SR, Kumar, N, Kutty, TRN
Alternate-current electroluminescent (ac EL) devices based on doped ZnS nanocrystals emitting blue, green, and orange-red colors are reported. ZnS nanocrystals doped with Cu+ – Al3+ and Cu+ –...
Flow-induced voltage and current generation in carbon nanotubes (2004)
Ghosh, S, Sood, AK, Ramaswamy, S, Kumar, N
New experimental results, and a plausible theoretical understanding thereof, are presented for the flow-induced currents and voltages observed in single-walled carbon nanotube samples. In our...
Hume, E, Muir, B, Kumar, N, Schubert, T, Baveja, J, Kjelleberg, S, ...
Dynamics of membrane nanotubulation and DNA self-assembly (2004)
Roopa, T., Kumar, N., Shivashankar, G.V.
Restricted Access. Please click on the alternative location for the open-access full text.
Overhead reduction techniques for software dynamic translation (2004)
K. Scott, N. Kumar, B. R. Childers, J. W. Davidson, M. L. Soffa
Software dynamic translation (SDT) is a technology that allows programs to be modified as they are running. The overhead of monitoring and modifying a running program’s instructions is often...
Overhead reduction techniques for software dynamic translation (2004)
K. Scott, N. Kumar, B. R. Childers, J. W. Davidson, M. L. Soffa
Software dynamic translation (SDT) is a technology that allows programs to be modified as they are running. The overhead of monitoring and modifying a running program’s instructions is often...
The aim of the present work is to carry out RANS computations of °ow through the inlet of a Hypersonic Research Vehicle (HRV) with a view to ac- complish detailed aerodynamic analysis, which should...
Carbon Nanotubes Provide a Charge (2003)
Cohen, Adam E., Ghosh, Shankar, Sood, A.K., Kumar, N.
Restricted Access.
Stripes and superconductivity in cuprates-is there a connection? (2003)
Restricted Access.
Seismic bearing capacity of rough footings on slopes using limit equilibrium (2003)
For foundations placed on horizontal ground surfaces, incorporating the effects of earthquake body forces, investigations have been performed by using the method of slices (Sarma & Iossifelis, 1990),...
Carbon Nanotube Flow Sensors (2003)
Ghosh, Shankar, Sood, AK, Kumar, N
We report that the flow of a liquid on single-walled carbon nanotube bundles induces a voltage in the sample along the direction of the flow. The voltage that was produced fit a logarithmic velocity...
Carbon Nanotube Flow Sensors (2003)
Ghosh , Shankar, Sood, A. K., Kumar, N
We report that the flow of a liquid on single-walled carbon nanotube bundles induces a voltage in the sample along the direction of the flow. The voltage that was produced fit a logarithmic velocity...
Long QT syndrome manifesting as pulseless epilepsy. (2003)
Abass, FA, Shahi, M, Kumar, N, Bhargava, M, Gupta, S, Puliyel, JM
Project Tracking and Management System (2003)
Kumar, N, Selvan, Ezhil V, Udankar, MS, Jayanthi, M
Project Tracking and Management System is a software package to monitor the progress and status of projects undertaken by an organization. The package provides information on projects which include...
Carbon Nanotube Flow Sensors (2003)
Ghosh, Shankar, Sood, AK, Kumar, N
We report that the flow of a liquid on single-walled carbon nanotube bundles induces a voltage in the sample along the direction of the flow. The voltage that was produced fit a logarithmic velocity...
Retargetable and reconfigurable software dynamic translation (2003)
K. Scott, N. Kumar, S. Velusamy, B. Childers, J. W. Davidson, M. L. Soffa
Software dynamic translation (SDT) is a technology that permits the modification of an executing program’s instructions. In recent years, SDT has received increased attention, from both industry...
Retargetable and reconfigurable software dynamic translation (2003)
K. Scott, N. Kumar, S. Velusamy, B. Childers, J. W. Davidson, M. L. Soffa
Software dynamic translation (SDT) is a technology that permits the modification of an executing program’s instructions. In recent years, SDT has received increased attention, from both industry...
Retargetable and reconfigurable software dynamic translation (2003)
K. Scott, N. Kumar, S. Velusamy, B. Childers, J. W. Davidson, M. L. Soffa
Software dynamic translation (SDT) is a technology that permits the modification of an executing program’s instructions. In recent years, SDT has received increased attention, from both industry...
Retargetable and Reconfigurable Software Dynamic Translation (2003)
K. Scott, N. Kumar, S. Velusamy, B. Childers, J. W. Davidson, M. L. Soffa
Software dynamic translation (SDT) is a technology that permits the modification of an executing program's instructions. In recent years, SDT has received increased attention, from both industry...
CASE REPORT - Acanthameba Meningoencephalitis : A Case Report (2002)
Hamide, A., Sarkar, E., Kumar, N., Das, A. K., Narayan, S. K., Parija, S. C.
A 45 year old lady presented with history of recent surgery for uterovaginal prolapse and retained vaginal tampons following which she developed chronic meningitis due to acanthameba infection....
The clinical risk index of babies (CRIB) score in India. (2002)
Khanna, R, Taneja, V, Singh, SK, Kumar, N, Sreenivas, V, Puliyel, JM
Correcting the quantum clock: Conditional sojourn times (2002)
Anantha Ramakrishna, S., Kumar, N.
Restricted Access. An open-access version is available at arXiv.org (one of the alternative locations)
Acanthameba meningoencephalitis : a case report. (2002)
Hamide, A, Sarkar, E, Kumar, N, Das, A, Narayan, S, Parija, S
Diffusion at constant speed in a model phase space (2002)
Anantha Ramakrishna, S., Kumar, N.
Restricted Access.
Ramachandra, SG, Ramesh, V, Krishnamurthy, HN, Kumar, N, Sundaram, K, Hardy, MP, ...
Hormonal approaches to male contraception that are based on the suppression of LH secretion require androgen replacement treatment to maintain sexual behaviour and secondary sexual characteristics....
Expert Panel Systems for Recruitment and Assessment (2002)
Kumar, N, Cyril, PJP, Kunthavai, SV, Sherif, Mohamed
The software package titled "Expert Panel System for Recruitment and Assessment n deals with automating the complete process of selecting "Panel of Experts" based on the requirements of...
Transport Management Information System iii A Client/Server Approach (2002)
Kumar, N, Nagarajan, J, Balasundaram, V
This package is an attempt to computerize some activities of the Transport Section such as maintenance, servicing and deduction of transport charges.It also features query based report generation.
Human Resource Information Management Through Personal and Online Systems (2002)
Kumar, N, Manikandan, G, Sivamathi, Padmaja R, Saravanan, T
The objective of this software package is to automate all the information and associate processes pertaining to trainees working in NAL. The associated processes include accumulation, selection,...
Query based approach to project staffing (2002)
Kumar, N, Rao, Nageshwar R, Kalpalatha, G, Jayaprakash, KR
The objective of this package is to automate the various activities associated with project staffing. The package assists the management in the selection of Project team for any given project....
Ramachandra, SG, Ramesh, V, Krishnamurthy, HN, Kumar, N, Sundaram, K, Hardy, MP, ...
Hormonal approaches to male contraception that are based on the suppression of LH secretion require androgen replacement treatment to maintain sexual behaviour and secondary sexual characteristics....
Anantha Ramakrishna, S., Kumar, N.
Restricted Access. An open-access version is available at arXiv.org (one of the alternative locations)
Landau diamagnetism revisited (2001)
Dattagupta, S., Jayannavar, A. M., Kumar, N.
The problem of diamagnetism, solved by Landau, continues to pose fascinating issues which have relevance even today. These issues relate to inherent quantum nature of the problem, the role of...
Ramakrishna, S. Anantha, Kumar, N.
We re-examine and correct an earlier derivation of the distribution of the Wigner phase delay time for wave reflection from a long one-dimensional disordered conductor treated in the continuum limit....
Photon transport in thin disordered slabs (2001)
Gopal, Venkatesh, Ramakrishna, Anantha S, Sood, AK, Kumar, N
We examine using Monte Carlo simulations, photon transport in optically thin slabs whose thickness L is only a few times the transport mean free path l*, with particles of different scattering...
Random amplifying medium: statistics of super-reflectance and time-delay fluctuations (2001)
Restricted Access.
Percutaneous drainage of tuberculous abcesses (2001)
Puri, S, Panicker, H, Narang, P, Kumar, N, Dhall, A, Gupta, S
Otogenic intracranical suppuration at a rare site - letter to editor. (2001)
Salahudeen, M, Inbasekaran, V, Kumar, N, Rajan, D, Sivakozhundu, M
Photon transport in thin disordered slabs (2001)
Gopal, Venkatesh, Ramakrishna, Anantha S, Sood, AK, Kumar, N
We examine using Monte Carlo simulations, photon transport in optically thin slabs whose thickness L is only a few times the transport mean free path l*, with particles of different scattering...
Low-temperature-adapted archaea are abundant in the environment, yet little is known about the thermal adaptation of their proteins. We have previously compared elongation factor 2 (EF-2) proteins...
Maguire, A. M., Kumar, N., Parker, J. L., Rowbotham, D. J., Thompson*, J. P.
In a randomized double‐blind study, we compared the effect of remifentanil and alfentanil on the cardiovascular response to laryngoscopy and tracheal intubation in patients on long‐term...
Rotating Bose gas with hard-core repulsion in a quasi-2D harmonic trap: vortices in BEC (2000)
We consider a gas of N(=6, 10, 15) Bose particles with hard-core repulsion, contained in a quasi-2D harmonic trap and subjected to an overall angular velocity $\Omega$ about the z-axis. Exact...
Correcting the quantum clock: conditional sojourn times (2000)
Ramakrishna, S. Anantha, Kumar, N.
Can the quantum-mechanical sojourn time be clocked without the clock affecting the sojourn time? Here we re-examine the previously proposed non-unitary clock, involving absorption/amplification by an...
Paraganglionoma of extrahepatic biliary tract causing obstructive jaundice. (2000)
Sandhu, BS, Kumar, N, Sachdeva, AK, Negi, SS, Sridhar, S, Malhotra, V, ...
Blocking of inter-subspace tunneling by intra sub-space inelastic scattering (2000)
Pareek, T.P., Jayannavar, A.M., Kumar, N.
Restricted Access.
Ramakrishna, S. Anantha, Das, E. Krishna, Vijayagovindan, G. V., Kumar, N.
The probability distribution of the reflection coefficient for light reflected from a one-dimensional random amplifying medium with {\it cross-correlated} spatial disorder in the real and the...
Bekele, Mulugeta, Ananthakrishna, G., Kumar, N.
Restricted Access.
Imaginary Potential as a Counter of Delay Time for Wave Reflection from a 1D Random Potential (1999)
Ramakrishna, S. Anantha, Kumar, N.
We show that the delay time distribution for wave reflection from a one-dimensional random potential is related directly to that of the reflection coefficient, derived with an arbitrarily small but...
Cut-off free finite zero-point vacuum energy and the cosmological missing mass problem (1999)
As the mass-energy is universally self-gravitating, the gravitational binding energy must be subtracted self-consistently from its bare mass value so as to give the physical gravitational mass. Such...
Diffusion of particles moving with constant speed (1999)
Ramakrishna, S. Anantha, Kumar, N.
The propagation of light in a scattering medium is described as the motion of a special kind of a Brownian particle on which the fluctuating forces act only perpendicular to its velocity. This...
Effect of Landauer's blow torch on the equilibration rate in a bistable potential (1999)
Bekele, Mulugeta, Rajesh, S, Ananthakrishna, G, Kumar, N
The kinetic aspect of Landauer's blow-torch effect is investigated for a model double-well potential with localized heating. Using the supersymmetric approach, we derive an approximate analytical...
Persistent random walks of photons in forward scattering media (1999)
Anantha Ramakrishna, S., Kumar, N.
Restricted Access.
Neither nociceptin nor its receptor are present in human synovial fluid or tissue (1999)
Kumar, N., Smart, D., Mason, S., McKnight, A. T., Rowbotham, D. J., Lambert, D. G.
Blocking of inter-subspace tunneling by intra subspace inelastic scattering (1998)
Pareek, T. P., Jayannavar, A. M., Kumar, N.
In recent years the notion of intrinsic decoherence and dephasing of a particle interacting with its environment is being investigated intensively. This has an important bearing on a plausible causal...
Geometric phase for a dimerized disordered continuum: Topological shot noise (1998)
Geometric phase shift associated with an electron propagating through a dimerized disordered continuum is shown to be 0, or +/-pi (modulo 2 pi), according to whether the associated circuit traversed...
Geometric phase for a dimerized disordered continuum: Topological shot noise (1998)
Restricted Access. An open-access version is available at arXiv.org (one of the alternative locations)
Arulraj, Anthony, Santhosh, P.N., Srinivasa Gopalan, R., Guha, Ayan, Raychaudhuri, A.K., Kumar, N., ...
Restricted Access.
Arulraj, Anthony, Santhosh, PN, Gopalan, Srinivasa R, Guha, Ayan, Raychaudhuri, AK, Kumar, N, ...
The charge ordering in $Nd_{0.5}Sr_{0.5}MnO_3 (\langle r_A\rangle = 1.24 \AA),$ which occurs on cooling the ferromagnetic metallic ground state, is readily destroyed on application of a magnetic...
Nucleolar organiser regions and morphologic subtypes of squamous cell carcinoma of cervix. (1998)
Kashyap, S, Kapila, K, Kumar, N, Kinra, G, Rath, GK, Verma, K
Effect of Landauer's blowtorch on the equilibration rate in a bistable potential (1998)
Bekele, Mulugeta, Rajesh, S., Ananthakrishna, G., Kumar, N.
Kinetic aspect of Landauer's blowtorch effect is investigated for a model double-well potential with localized heating. Using the supersymmetric approach, we derive an approximate analytical...
Coherently amplifying random medium: Statistics of super-reflection (1998)
Kumar, N., Pradhan, P., Jayannavar, A.M.
Restricted Access.
In his $comment^1$ Heinrichs has questioned the validity of the starting assumption made in our $paper^2$, namely, that in the limit of short sample length (L), the phase $\theta(L)$ of the complex...
Highly anisotropic layered systems: intraplanar metallicity and inter-planar non-metallicity (1998)
Restricted Access.
Arulraj, Anthony, Santhosh, PN, Gopalan, Srinivasa R, Guha, Ayan, Raychaudhuri, AK, Kumar, N, ...
The charge ordering in $Nd_{0.5}Sr_{0.5}MnO_3 (\langle r_A\rangle = 1.24 \AA),$ which occurs on cooling the ferromagnetic metallic ground state, is readily destroyed on application of a magnetic...
In his $comment^1$ Heinrichs has questioned the validity of the starting assumption made in our $paper^2$, namely, that in the limit of short sample length (L), the phase $\theta(L)$ of the complex...
Spin-valve effects in manganese-oxide perovskites: CMR (1998)
Kumar, N., Vijayagovindan, G.V., Pradhan, P.
Restricted Access.
Solute dispersion along unsteady groundwater flow in a semi-infinite aquifer (1998)
Analytical and numerical solutions are obtained for dispersion of pollutants along unsteady groundwater flow in a longitudinal direction through semi-infinite aquifers the permeability of which is...
Solute dispersion along unsteady groundwater flow in a semi-infinite aquifer (1998)
Analytical and numerical solutions are obtained for dispersion of pollutants along unsteady groundwater flow in a longitudinal direction through semi-infinite aquifers the permeability of which is...
Geometric phase for a dimerized disordered continuum: Topological shot noise (1997)
Geometric phase shift associated with an electron propagating through a dimerized-disordered continuum is shown to be 0, or $\pm \pi$ (modulo 2$\pi$), according as the associated circuit traversed in...
Lasing in active, sub-mean-free path-sized systems with dense, random, weak scatterers (1997)
Prasad, B.R., Ramachandran, Hema, Sood, Ajay K., Subramanian, C.K., Kumar, N.
Restricted Access.
Hall angle in high-T_c cuprates: Anomalous temperature dependence and anisotropic scattering (1997)
The anisotropy of the scattering rates, 1/$\tau_{tr} \propto T$ and 1/$\tau_H \propto T^2$, implied effectively by the anomalous temperature dependence of the normal-state in-plane Hall angle, $\cot...
Normal-State c-Axis Resistivity of the High-Tc Cuprate Superconductors (1997)
Kumar, N., Pareek, T.P., Jayannavar, A.M.
Restricted Access.
Restricted Access.
Statistics of Mesoscopic Fluctuations of Quantum Capacitance (1997)
Restricted Access.
Investigations of a Ferrimagnetic Spinel-Garnet Composite System (1997)
Kumar, N., Venugopal Reddy, P., Kishan, P.
A composite system comprising of two ferrimagnetic oxide compounds, a spinel and a garnet, has been investigated. A series of materials with varying proportion of the contents of magnesium manganese...
Magnetic Studies on LiZn Ferrite Films (1997)
Dash, J., Venkataramani, N., Krishnan, R., Date, S., Kulkarni, S., Prasad, S., ...
In this paper, we report the study of the magnetic properties of (Li0.5-x/2 Mn0.1ZnxFe2.35-x/2O4) films with x=0, 0.16, 0.32, 0.48. The films were deposited on fused quartz substrates by rf...
Preparation and Study of Finely Dispersed Magnetic Oxide in Polymer Matrix (1997)
Vadera, S., Tuli, A., Kumar, N., Sharma, B., Gupta, S., Prakash, C., ...
The paper describes the synthesis and characterisation of a composite of Fe-Co with copolymer of aniline formaldehyde by chemical processing. The resulting material was studied by XRD, X-ray...
Investigations of a Ferrimagnetic Spinel-Garnet Composite System (1997)
Kumar, N., Venugopal Reddy, P., Kishan, P.
A composite system comprising of two ferrimagnetic oxide compounds, a spinel and a garnet, has been investigated. A series of materials with varying proportion of the contents of magnesium manganese...
Magnetic Studies on LiZn Ferrite Films (1997)
Dash, J., Venkataramani, N., Krishnan, R., Date, S., Kulkarni, S., Prasad, S., ...
In this paper, we report the study of the magnetic properties of (Li0.5-x/2 Mn0.1ZnxFe2.35-x/2O4) films with x=0, 0.16, 0.32, 0.48. The films were deposited on fused quartz substrates by rf...
Preparation and Study of Finely Dispersed Magnetic Oxide in Polymer Matrix (1997)
Vadera, S., Tuli, A., Kumar, N., Sharma, B., Gupta, S., Prakash, C., ...
The paper describes the synthesis and characterisation of a composite of Fe-Co with copolymer of aniline formaldehyde by chemical processing. The resulting material was studied by XRD, X-ray...
Investigations of a Ferrimagnetic Spinel-Garnet Composite System (1997)
Kumar, N., Venugopal Reddy, P., Kishan, P.
A composite system comprising of two ferrimagnetic oxide compounds, a spinel and a garnet, has been investigated. A series of materials with varying proportion of the contents of magnesium manganese...
Magnetic Studies on LiZn Ferrite Films (1997)
Dash, J., Venkataramani, N., Krishnan, R., Date, S., Kulkarni, S., Prasad, S., ...
In this paper, we report the study of the magnetic properties of (Li0.5-x/2 Mn0.1ZnxFe2.35-x/2O4) films with x=0, 0.16, 0.32, 0.48. The films were deposited on fused quartz substrates by rf...
Preparation and Study of Finely Dispersed Magnetic Oxide in Polymer Matrix (1997)
Vadera, S., Tuli, A., Kumar, N., Sharma, B., Gupta, S., Prakash, C., ...
The paper describes the synthesis and characterisation of a composite of Fe-Co with copolymer of aniline formaldehyde by chemical processing. The resulting material was studied by XRD, X-ray...
Anti-invasive activity of alkaloids and polyphenolics in vitro. (1997)
PARMAR, VS, Bracke, Marc, Philippe, Jan, WENGEL, J, JAIN, SC, OLSEN, CE, ...
Postoperative Intravenous Drip Infusion is not Required after Minilaparotomy Cholecystectomy (1997)
N. Kumar, K. B. Annudath, H. S. Shukla, A. Singh, K. Kumar
Objective: To determine if drip infusion should be discontinued after full recovery of the patient from anaesthesia after minilaparotomy cholecystectomy in uncomplicated cases.Design: A randomised...
Suvisaari, J, Sundaram, K, Noe, G, Kumar, N, Aguillaume, C, Tsong, YY, ...
The density-of-states (DOS) for a magnetized (B) two-dimensional electron gas (2DEG) containing point scatterers of arbitrary strengths, concentration ($n_s$) and distribution is analyzed. It is...
Optimal barrier subdivision for Kramers' escape rate (1996)
Bekele, Mulugeta, Ananthakrishna, G., Kumar, N.
We examine the effect of subdividing the potential barrier along the reaction coordinate on Kramers' escape rate for a model potential. Using the known supersymmetric potential approach, we show the...
Sequential intermittent pneumatic compression therapy for lymphoedematous legs{letter} (1996)
Venkata, R, Kumar, N, Verghese, B, Kumar, P, Rathnam, V, Nanda, K
Potency and time course of action of rocuronium during desflurane and isoflurane anaesthesia (1996)
Kumar, N., Mirakhur, R. K., Symington, MJJ., McCarthy, G. J.
Antagonism of mivacurium block with edrophonium from various degrees of spontaneous recovery (1995)
CONNOLLY, F. M., MIRAKHUR, R. K., LOAN, P. B., MCCOY, E. P., SYMINGTON, M., KUMAR, N.
Seventy adult patients received mivacurium 0.15 mg kg−1 during anaesthesia with thiopentone, nitrous oxide and 0.5% halothane. Neuromuscular block was monitored using mechanomyography and...
Sanyal, S, Sood, AK, Ramkumar, S, Ramaswamy, S, Kumar, N
We report an unexpected behavior of the intensity autocorrelation functions CVV ( t ) (polarized) and CHH ( t ) (depolarized) of multiply scattered light from dense colloidal polyball crystals under...
Bhat, SV, Rastogi, A, Kumar, N, Nagarajan, R, Rao, CNR
The low-field dependence of non resonant microwave absorption (MWA) in polycrystalline samples of $YBa_2Cu_3O_{7-\delta}$ with $0.1\leq \delta \leq0.5$ has been measured at $T< T_c$ along with...
Srinivasu, VV, Bhat, SV, Kumar, N
We have measured r.f. absorption at 14 MHz in powdered samples of sintered $YBa_2Cu_30_{7-\delta}$ at 77K $(T_c\approx 90 K)$ as function of low d.c. scan field $(H_{dc})$ for different amplitudes of...
Sanyal, S, Sood, AK, Ramkumar, S, Ramaswamy, S, Kumar, N
We report an unexpected behavior of the intensity autocorrelation functions CVV ( t ) (polarized) and CHH ( t ) (depolarized) of multiply scattered light from dense colloidal polyball crystals under...
Bhat, SV, Rastogi, A, Kumar, N, Nagarajan, R, Rao, CNR
The low-field dependence of non resonant microwave absorption (MWA) in polycrystalline samples of $YBa_2Cu_3O_{7-\delta}$ with $0.1\leq \delta \leq0.5$ has been measured at $T< T_c$ along with...
Srinivasu, VV, Bhat, SV, Kumar, N
We have measured r.f. absorption at 14 MHz in powdered samples of sintered $YBa_2Cu_30_{7-\delta}$ at 77K $(T_c\approx 90 K)$ as function of low d.c. scan field $(H_{dc})$ for different amplitudes of...
One-parameter scaling: some open questions (1994)
After a re-statement of the one-parameter scaling ansatz in the strong (global) sense, the main predictions of and the experimental/numerical support for it are briefly reviewed. A mathematical...
Critical-current variation with Pr content in {Y_{1-x}Pr_xBa_2Cu_3O_7} epitaxial films (1993)
Hegde, MS, Thomas, Boben, Vasanthacharya, NY, Bhat, SV, Srinivasu, VV, Kumar, N
c-axis-oriented epitaxial {Y_{1-x}Pr_xBa_2Cu_3O_7} (x = 0, 0.05, 0.1, 0.2, 0.3, and 0.35) thin films have been grown with the pulsed-laser-deposition method. Superconducting transition temperatures...
Suppression of conductance fluctuations in short one-dimensional disordered conductors (1993)
We find that on short-length scales the phase of the amplitude reflection coefficient is strongly correlated with the random potential in the one-dimensional disordered conductors. This correlation...
Development of 1GES Interface for MicroCADDs GCD (1993)
Nagendran, S, Kripakaran, P, Ranganathan, D, Kumar, N
The term IGES stands for Initial Graphics Exchange Specification. Normally CAD packages like AutoCAD support the standard IGES format for storing the graphical database of a drawing. But few CAD...
ISAM file handling in turbo C - an enhancement (1993)
Ranganathan, D, Kumar, N, Nagendran, S, Kripakaran, P
ISAM refers to Indexed Sequential Access Mode. Under this records can be created/accussed modified, based on any particular data field called index key. This facility is not available as a built-in...
Suppression of conductance fluctuations in short one-dimensional disordered conductors (1993)
We find that on short-length scales the phase of the amplitude reflection coefficient is strongly correlated with the random potential in the one-dimensional disordered conductors. This correlation...
Critical-current variation with Pr content in {Y_{1-x}Pr_xBa_2Cu_3O_7} epitaxial films (1993)
Hegde, MS, Thomas, Boben, Vasanthacharya, NY, Bhat, SV, Srinivasu, VV, Kumar, N
c-axis-oriented epitaxial {Y_{1-x}Pr_xBa_2Cu_3O_7} (x = 0, 0.05, 0.1, 0.2, 0.3, and 0.35) thin films have been grown with the pulsed-laser-deposition method. Superconducting transition temperatures...
Congenital aneurysm of the muscular interventricular septum (1993)
PRABHAKAR, G., KUMAR, N., AL-OUFI, S., DEMOOR, M., AL-HALEES, Z., DURAN, M. G.
Cardiac aneurysms are rare in the paediatric age group, and are classfied as congenital when the aetiology cannot be demonstrated. We report a 1-year-old patient with a congenital aneurysm of the...
Temperature dependence of the c-axis resistivity of high-$T_c$ layered oxides (1992)
Electrical transport along the c axis of high-$T_c$ layered oxides is pictured as a coherent interplanar tunneling between neighboring layers blocked by repeated intraplanar incoherent scatterings....
Sood, AK, Chandrabhas, N, Muthu, DVS, Jayaraman, A, Kumar, N, Krishnamurthy, HR, ...
We report the first observation of a large pressure-induced red-shift of the photoluminescence band in single crystals of C60 and the associated colour change of the sample from red to black at 3.2...
Sood, AK, Chandrabhas, N, Muthu, DVS, Jayaraman, A, Kumar, N, Krishnamurthy, HR, ...
We report the first observation of a large pressure-induced red-shift of the photoluminescence band in single crystals of C60 and the associated colour change of the sample from red to black at 3.2...
Temperature dependence of the c-axis resistivity of high-$T_c$ layered oxides (1992)
Electrical transport along the c axis of high-$T_c$ layered oxides is pictured as a coherent interplanar tunneling between neighboring layers blocked by repeated intraplanar incoherent scatterings....
One-parameter scaling: some open questions (1992)
After a re-statement of the one-parameter scaling ansatz in the strong (global) sense, the main predictions of and the experimental/numerical support for it are briefly reviewed. A mathematical...
An Autolisp postprocessor for import of drawings to Autocad from other systems (1990)
This document describes the transfer of drawings from any CAD package to Autocad. It also provides details of post processing activities using AUTOLISP and FORTRAN programs
Localization of isolated holes in a Mott insulator and delocalization by pairing (1990)
I have calculated the ground-state energy and wave function of a single (pair of) hole(s) moving in a two-dimensional antiferromagnetically correlated background in the self-retracing-path...
Magnetic pairing of charge carriers in doped Mott insulators (1990)
A mechanism is proposed for supercond. as resulting from magnetic pairing. The predictions agree with exptl. detns.
A note on tunable transconductance of a branching molecular wire (1990)
It is shown that the Griffith boundary conditions on the wavefunction of an electron moving coherently on a molecular network of one-dimensional conductors (delocalized bonds) lead to a branching...
Investigation of superplasticity by the impression creep technique (1990)
Kumar, N, Raman, KS, Sastry, DH, Little, EA
Impression creep tests have been carried out on a $Zn-22\% Al$ eutectoid alloy in two heattreatment conditions, as a function of applied stress and at temperatures of $\sim 25$ to $270^0C$. At small...
Rao, CNR, Ramakrishnan, TV, Kumar, N
The thermopower, $\alpha$, of many members of the $Bi_2Ca_{1-x}Y_xSr_2Cu_2O_{8+\delta}$, $Bi_{2-y}Pb_yCaSr_2Cu_2O_{8+\delta}$, $Tl_yCa_{1-x}Y_xBa_2Cu_2O_{6+\delta}$...
Investigation of superplasticity by the impression creep technique (1990)
Kumar, N, Raman, KS, Sastry, DH, Little, EA
Impression creep tests have been carried out on a $Zn-22\% Al$ eutectoid alloy in two heattreatment conditions, as a function of applied stress and at temperatures of $\sim 25$ to $270^0C$. At small...
Localization of isolated holes in a Mott insulator and delocalization by pairing (1990)
I have calculated the ground-state energy and wave function of a single (pair of) hole(s) moving in a two-dimensional antiferromagnetically correlated background in the self-retracing-path...
Rao, CNR, Ramakrishnan, TV, Kumar, N
The thermopower, $\alpha$, of many members of the $Bi_2Ca_{1-x}Y_xSr_2Cu_2O_{8+\delta}$, $Bi_{2-y}Pb_yCaSr_2Cu_2O_{8+\delta}$, $Tl_yCa_{1-x}Y_xBa_2Cu_2O_{6+\delta}$...
Conduction in strongly anisotropic metals (1990)
A model for conduction in a strongly anisotropic metal is considered. It is shown that a region of temperatures can exist such that in the planes (the easy direction) transport is of the usual...
Localization of quantum vacancies in a Mott insulator and delocalization by pairing (1990)
The ground-state energy and wavefunction of a single (pair of) hole(s) moving in a two-dimensional antiferromagnetically correlated background is calculated within the t-J model in the retraceable...
Magnetic pairing of charge carriers in doped Mott insulators (1990)
A mechanism is proposed for supercond. as resulting from magnetic pairing. The predictions agree with exptl. detns.
A note on tunable transconductance of a branching molecular wire (1990)
It is shown that the Griffith boundary conditions on the wavefunction of an electron moving coherently on a molecular network of one-dimensional conductors (delocalized bonds) lead to a branching...
Localization of quantum vacancies in a Mott insulator and delocalization by pairing (1990)
The ground-state energy and wavefunction of a single (pair of) hole(s) moving in a two-dimensional antiferromagnetically correlated background is calculated within the t-J model in the retraceable...
Conduction in strongly anisotropic metals (1990)
A model for conduction in a strongly anisotropic metal is considered. It is shown that a region of temperatures can exist such that in the planes (the easy direction) transport is of the usual...
Transfer of Files Between IE-32C PC/AT CAD System and Sperry 1100 System. (1989)
Kumar, N, Ranganathan, D, Murthy, Uma R, Janardhan, S
PLOT-10 on Sperry Univac System is a popular package but not very "interactive". MicroCADDS on IE-32C is a highly interactive modelling package. Geometric modelling package. Geometric modelling can...
Transfer of files between IE-32C PC/AT CAD system and autotrol AD/380 graphics system (1989)
Murthy, Uma R, Ranganathan, D, Kumar, N, Janardhan, S
OS.-1000 on &utotrol AD/380 provides a 23- D data base whereas MicroCL DDS' on MI-32C offers a true 3D data base. These two databases have different data structures necessitating the development of...
Cold fusion: is there a solid state effect? (1989)
Recently Fischmann and Pons’ have reported experimental observation of an ‘excess’ heat production accompanied by emissions of gamma rays and neutrons when isotopic hydrogen (D,) was infused...
Cold fusion: is there a solid state effect? (1989)
Recently Fischmann and Pons’ have reported experimental observation of an ‘excess’ heat production accompanied by emissions of gamma rays and neutrons when isotopic hydrogen (D,) was infused...
Constant conductance fluctuations in disordered metals (1988)
Heinrichs, J, Jayannavar, AM, Kumar, N
We discuss the effect of fluctuations of the random potential in directions transverse to the current flow in a modified Migdal-Kadanoff approach to probabilistic scaling of conductance with size L,...
Generalized program for fitting multiple curves using AD/380 CAD system (1987)
Highly interactive quick actions have been developed for fitting smooth curves on multiple data sets residing as a disk file on the AD/380 system or as a tape fioe from a host system. Quick Actions...
Low-temperature resistance fluctuation in disordered conductors (1987)
At low temperatures the electron elastic mean free path in a disordered conductor can become much smaller than the inelastic mean free path (or more precisely the Thouless length) which in turn may...
Low-temperature resistance fluctuation in disordered conductors (1987)
At low temperatures the electron elastic mean free path in a disordered conductor can become much smaller than the inelastic mean free path (or more precisely the Thouless length) which in turn may...
Vijayagovindan, GV, Jayannavar, AM, Kumar, N
Following an invariant-imbedding approach, we obtain analytical expressions for the ensemble-averaged resistance (ρ) and its Sinai’s fluctuations for a one-dimensional disordered conductor in the...
Kripakaran, P, Subramanian, KR, Kumar, N
Quick Actions on the AD-380 CAD System and Fortran programs both on AD/380 and Sperry 1100 systems have been developed for the off-line transfer of 3-D Graphic Figures from AD/380 to Sperry 1100...
Kripakaran, P, Subramanian, KR, Kumar, N
Quick Actions on the AD-380 CAD system and Fortran programs both on AD/380 and Sperry 1100 systems have been developed for the Off-line transfer of 3-D Graphic Figures from AD/380 to Sperry 1100...
Information theory and one-dimensional disordered conductors (1985)
A novel method is proposed to treat the problem of the random resistance of a strictly one-dimensional conductor with static disorder. It is suggested, for the probability distribution of the...
Quantum first-passage problem (1985)
Formulation of quantum first passage problem is attempted in terms of a restricted Feynman path integral that simulates an absorbing barrier as in the corresponding classical case. The positivity of...
Kumar, N, Kripakaran, P, Subramanian, KR, Panchapakesan, S
Quick Actions on AD/380 System and Fortran Programs both on AD/380 and Sperry have been developed for the Off-line transfer of figures between AD/38O and Sperry 1100 Systems.
Many utilities in the form of Quick Actions and Fortran Programs have been developed for the extraction of co-ordinates of any graphic figure of AD/380 system.
Observations of a plastic crystalline phase in solid MBBA (1985)
Armugam, S, Bhat, SV, Kumar, N, Ramanathan, KV, Srinivasan, R
Wideline and high resolution NMR studies have been carried out in MBBA in its isotropic, nematic and solid phases. Isotropic and nematic spectra correspond to what has been reported earlier. In the...
Software package for the implementation of AD/380 fonts on UNIVAC 1100 system (1985)
Subramanian, KR, Kripakaran, P, Kumar, N
Utilities for extraction of Font details, transfer to UNIVAC 1100 from AD/380, implementation of fonts for viewing and plotting on the Tektronix & Calcomp graphic devices have been developed in the...
Vijayan, Kalyani, Singh, AK, Panchapakesan, S, Janardhan, S, Kumar, N
To analyse the overlap problem in the Avrami formalism, the quick actions 'KVELL' and 'KVCIR' I have been developed. Also, the FORTRAN program I KVXY' has been developed to extract the x,y...
NMR and x-ray investigations of a plastic crystalline phase in MBBA (1985)
Arumugam, S, Bhat, SV, Kumar, N, Ramanathan, KV, Srinivasan, R
Wideline and high resolution NMR studies have been carried out on MBBA in its isotropic, nematic and solid phases. Isotropic and nematic phase spectra correspond to what has been reported earlier. In...
Observations of a plastic crystalline phase in solid MBBA (1985)
Armugam, S, Bhat, SV, Kumar, N, Ramanathan, KV, Srinivasan, R
Wideline and high resolution NMR studies have been carried out in MBBA in its isotropic, nematic and solid phases. Isotropic and nematic spectra correspond to what has been reported earlier. In the...
NMR and x-ray investigations of a plastic crystalline phase in MBBA (1985)
Arumugam, S, Bhat, SV, Kumar, N, Ramanathan, KV, Srinivasan, R
Wideline and high resolution NMR studies have been carried out on MBBA in its isotropic, nematic and solid phases. Isotropic and nematic phase spectra correspond to what has been reported earlier. In...
Information theory and resistance fluctuations in one-dimensional disordered conductors (1985)
A novel method is proposed to treat the problem of the random resistance of a strictly one-dimensional conductor with static disorder. For the probability distribution of the transfer matrix R of the...
Non-observability of CESR in superconductors (1983)
Amritkar, RE, Kumar, N, Srinivasan, R
The negative result of S.N. Ekbote et al. (1980) with respect to observation of conduction ESR (CESR) in A-15 compounds of Nb in the superconducting state is discussed in terms of the effect of...
Non-observability of CESR in superconductors (1983)
Amritkar, RE, Kumar, N, Srinivasan, R
The negative result of S.N. Ekbote et al. (1980) with respect to observation of conduction ESR (CESR) in A-15 compounds of Nb in the superconducting state is discussed in terms of the effect of...
A randomly interrupted strand model of a one-dimensional conductor is considered. An exact analytical expression is obtained for the temperature-dependent ac mobility for a finite segment drawn at...
Critical-point Properties of Liquids and the Born-Green Theory (1982)
Kumar, N, March, NH, Wasserman, A
Recent work of Jones et al. giving the long-range behaviour of the pair correlation function is used to confirm that the critical ratio Pc/nckBTc = 1/2 in the Born-Green theory. This deviates from...
Local spin susceptibility in disordered alloys II (1976)
Brouers, F., Kumar, N., Litt, C.
We explore the analogy between a new formulation of the problem of local susceptibility in concentrated alloys and the theory of localization of electronic states in disordered systems. This...
Local spin susceptibility in disordered alloys II (1976)
Brouers, F., Kumar, N., Litt, C.
We explore the analogy between a new formulation of the problem of local susceptibility in concentrated alloys and the theory of localization of electronic states in disordered systems. This...
Local spin susceptibility in disordered alloys II (1976)
Brouers, F., Kumar, N., Litt, C.
We explore the analogy between a new formulation of the problem of local susceptibility in concentrated alloys and the theory of localization of electronic states in disordered systems. This...
Brillouin scattering by one-phonon-two-magnon interacting excitations in ferromagnetic dielectrics is discussed. The basic light scattering mechanism is taken to be the modulation of the...
Identification of continuous epitopes in the target antigens of Plasmodium falciparum transmission-blocking antibodies is likely to facilitate the production of a subunit peptide vaccine. Two such...
Roeffen, W, Geeraedts, F, Eling, W, Beckers, P, Wizel, B, Kumar, N, ...
By use of the parental hybridoma cell line 63F2A2 that produces specific antibodies of immunoglobulin isotype G1 (IgG1; 63F2A2.1) against Pfs230, we attempted to enrich for the synthesis of the...
Human immune response directed against Plasmodium falciparum heat shock-related proteins.
Kumar, N, Zhao, Y, Graves, P, Perez Folgar, J, Maloy, L, Zheng, H
Heat shock-related stress proteins present in all eucaryotes and procaryotes have been shown to be immune targets in a broad range of infections. We have analyzed sera from people exposed primarily...
Grotendorst, C A, Kumar, N, Carter, R, Kaushal, D C
Antibodies against gametes of malarial parasites (Plasmodium spp.) have previously been shown to block infectivity of the parasites to mosquitoes by preventing fertilization of the parasites in the...
Kumar, N, Syin, C A, Carter, R, Quakyi, I, Miller, L H
Genes homologous to heat shock protein 70 have been described in parasitic protozoa. It has been proposed that they may be important to the parasite as it moves from the vertebrate host at 37 degrees...
Kumar, N, Cohen, M A, Bishop, C E, Wallack, S S
OBJECTIVE. This article examines the factors related to an individual's decision to purchase a given amount of long-term care insurance coverage. DATA SOURCE AND STUDY SETTING. Primary data analyses...
An accessory foramen deep in the infraorbital fissure.
Bisaria, K K, Kumar, N, Jaiswal, A K, Sharma, P K, Mittal, M, Bisaria, S D
The lateral rectus spine of the superior orbital fissure.
Bisaria, K K, Kumar, N, Prakesh, M, Sharma, P K, Agarwal, P P, Bisaria, S D, ...
Repeated endoscopic sclerotherapy for active variceal bleeding.
Sarin, S K, Nanda, R, Kumar, N, Vij, J C, Anand, B S
Emergency endoscopic sclerotherapy (EEST) during continued moderate to severe bleeding was carried out using a flexible endoscope and absolute alcohol as a sclerosant in 38 patients with variceal...
Dynamics of Membrane Nanotubulation and DNA Self-Assembly
Roopa, T., Kumar, N., Bhattacharya, S., Shivashankar, G. V.
A localized point-like force applied perpendicular to a vesicular membrane layer, using an optical tweezer, leads to membrane nanotubulation beyond a threshold force. Below the threshold, the...
Complications of intra- and peri-articular steroid injections.
A prospective study was conducted to investigate the possible complications associated with intra- and peri-articular steroid injections. Data are presented on 1147 injections performed on 672...
We have studied the immunogenicity of a recombinant heat-shock protein-related stress protein of 70,000 MW (Pfhsp) of the human malaria parasite Plasmodium falciparum in H-2 congenic and non-congenic...
Attenuation of Pseudomonas aeruginosa virulence by quorum sensing inhibitors
Hentzer, M, Wu, H, Andersen, JB, Riedel, K, Rasmussen, TB, Bagge, N, ...
Traditional treatment of infectious diseases is based on compounds that kill or inhibit growth of bacteria. A major concern with this approach is the frequent development of resistance to...
Controlled therapeutic trial to determine the optimum dose of antacids in duodenal ulcer.
Kumar, N, Vij, J C, Karol, A, Anand, B S
Antacids are widely used in the management of duodenal ulcer but the optimum dose of antacid required for ulcer healing has not been determined. We therefore studied 107 patients with endoscopically...
Kumar, A, Kumar, N, Vij, J C, Sarin, S K, Anand, B S
To determine the optimum dose of ispaghula husk in patients with irritable bowel syndrome (IBS) and to assess the correlation, if any between the relief in patients' symptoms and the whole gut...
The aetiology of perforating ocular injuries in children
Thompson, C G, Kumar, N, Billson, F A, Martin, F
Aims: To assess the aetiological factors associated with the occurrence of perforating ocular injuries in children in an urban setting and to assess the visual outcomes of such injuries.
Postoperative Intravenous Drip Infusion is not Required after Minilaparotomy Cholecystectomy
Kumar, N., Annudath, K. B., Shukla, H. S., Singh, A., Kumar, K.
Objective: To determine if drip infusion should be discontinued after full recovery of the patient from anaesthesia after minilaparotomy cholecystectomy in uncomplicated cases.
Rubber band ligation of haemorrhoids in the out-patient clinic.
Kumar, N., Paulvannan, S., Billings, P. J.
Rubber band ligation (RBL) is an effective treatment for symptomatic haemorrhoids but carries significant morbidity. We performed a prospective study of 98 consecutive patients treated by RBL in the...
Post lumbar puncture discitis and vertebral collapse.
Bhatoe, H. S., Gill, H. S., Kumar, N., Biswas, S.
Discitis and vertebral collapse are rare but serious complications of lumbar puncture. Clinical profile, management and course of post lumbar puncture discitis in five patients is presented. Such a...
Where angels fear to tread? Mapping women and men in India
N Kumar, S Raju, P J Atkins, J G Townsend
The authors have produced the Atlas of Women and Men in India, using material from the 1991 Census, mainly at district level. The Atlas may be unacceptable to Indian geographers because it seeks to...
Kilfoyle, D H, Dyck, P J, Wu, Y, Litchy, W J, Klein, D M, Dyck, P J B, ...
Is one-parameter scaling theory of localisation consistent? Comment on Schuh's comment
It is maintained that the one-parameter scaling theory is inconsistent with the physics of Anderson localisation.
Braunschweiger, P. G., Johnson, C. S., Kumar, N., Ord, V., Furmanski, P.
In the present studies the effect of bilateral adrenalectomy on the pathophysiologic responses to recombinant human interleukin-1 alpha (rHIL-1 alpha) was determined in RIF-1 tumour models. Acute...