R. Kumar

Details der Publikationsliste

Zeitraum

1967 - 2009

Anzahl

318

Co-Autoren

Finite element modelling of the mechanical loss of silica suspension fibres for advanced gravitational wave detectors (2009)

Cumming, A., Heptonstall, A., Kumar, R., Cunningham, W., Torrie, C., Barton, M., ...

Detection of gravitational waves remains one of the most challenging problems faced by experimental physicists. One of the most significant limits to the sensitivity of current, and future,...

First LIGO search for gravitational wave bursts from cosmic (super)strings (2009)

Abbott, B. P., Abbott, R., Adhikari, R., Ajith, P., Allen, B., Allen, G., ...

We report on a matched-filter search for gravitational wave bursts from cosmic string cusps using LIGO data from the fourth science run (S4) which took place in February and March 2005. No...

Searches for gravitational waves from known pulsars with S5 LIGO data (2009)

Collaboration, The LIGO Scientific, Abbott, R., Acernese, F., Adhikari, R., Ajith, P., ...

We present a search for gravitational waves from 116 known millisecond and young pulsars using data from the fifth science run of the LIGO detectors. For this search ephemerides overlapping the run...

Search for gravitational wave ringdowns from perturbed black holes in LIGO S4 data (2009)

Abbott, B. P., Abbott, R., Adhikari, R., Ajith, P., Allen, B., Allen, G., ...

According to general relativity a perturbed black hole will settle to a stationary configuration by the emission of gravitational radiation. Such a perturbation will occur, for example, in the...

Flax reinforced thermoset composites from polyfurfuryl alcohol (2009)

Kumar, R, Anandjiwala, R

11th International Conference on Advanced Materials (ICAM). Rio de Janeiro, Brazil, 20-25 September 2009

Search for gravitational-wave bursts associated with gamma-ray bursts using data from LIGO Science Run 5 and Virgo Science Run 1 (2009)

Collaboration, LIGO Scientific, Abbott, R., Acernese, F., Adhikari, R., Ajith, P., ...

We present the results of a search for gravitational-wave bursts associated with 137 gamma-ray bursts (GRBs) that were detected by satellite-based gamma-ray experiments during the fifth LIGO science...

Stacked Search for Gravitational Waves from the 2006 SGR 1900+14 Storm (2009)

Abbott, B. P., Abbott, R., Adhikari, R., Ajith, P., Allen, B., Allen, G., ...

We present the results of a LIGO search for short-duration gravitational waves (GWs) associated with the 2006 March 29 SGR 1900+14 storm. A new search method is used, "stacking" the GW data around...

Canonical Brackets from Symmetry Principles (2009)

Gupta, S., Kumar, R., Malik, R. P.

We deduce the canonical brackets for a two (1 + 1)-dimensional (2D) free Abelian 1-form gauge theory by exploiting the beauty and strength of the continuous symmetries of a Becchi-Rouet-Stora-Tyutin...

Search for gravitational waves from low mass compact binary coalescence in 186 days of LIGO's fifth science run (2009)

Abbott, B. P., Abbott, R., Adhikari, R., Ajith , P., Allen, B., Allen, G., ...

We report on a search for gravitational waves from coalescing compact binaries, of total mass between 2 and 35M_☉, using LIGO observations between November 14, 2006 and May 18, 2007. No...

Einstein@Home search for periodic gravitational waves in early S5 LIGO data (2009)

Abbott, B. P., Abbott, R., Adhikari, R., Ajith, P., Allen, B., Allen, G., ...

This paper reports on an all-sky search for periodic gravitational waves from sources such as deformed isolated rapidly spinning neutron stars. The analysis uses 840 hours of data from 66 days of the...

LIGO: the Laser Interferometer Gravitational-Wave Observatory (2009)

Abbott, B. P., Abbott, R., Adhikari, R., Ajith, P, Allen, B., Allen, G., ...

The goal of the Laser Interferometric Gravitational-Wave Observatory (LIGO) is to detect and study gravitational waves (GWs) of astrophysical origin. Direct detection of GWs holds the promise of...

On free 4D Abelian 2-form and anomalous 2D Abelian 1-form gauge theories (2009)

Gupta, S., Kumar, R., Malik, R. P.

We establish a few striking similarities and some glaring differences between (i) the free four (3 + 1)-dimensional (4D) Abelian 2-form gauge theory, and (ii) the anomalous two (1 + 1)-dimensional...

An upper limit on the stochastic gravitational-wave background of cosmological origin (2009)

Abbott, B. P., Abbott, R., Acernese, F., Adhikari, R., Ajith, P., Allen, B., ...

A stochastic background of gravitational waves is expected to arise from a superposition of a large number of unresolved gravitational-wave sources of astrophysical and cosmological origin. It should...

LIGO: the Laser Interferometer Gravitational-Wave Observatory (2009)

Abbott, B. P., Abbott, R., Adhikari, R., Ajith, P., Allen, B., Allen, G., ...

The goal of the Laser Interferometric Gravitational-Wave Observatory (LIGO) is to detect and study gravitational waves (GWs) of astrophysical origin. Direct detection of GWs holds the promise of...

Search for gravitational waves from low mass binary coalescences in the first year of LIGO's S5 data (2009)

Abbott, B. P., Abbott, R., Adhikari, R., Ajith, P., Allen, B., Allen, G., ...

We have searched for gravitational waves from coalescing low mass compact binary systems with a total mass between 2M(circle dot) and 35M(circle dot) and a minimum component mass of 1M(circle dot)...

Stacked Search for Gravitational Waves from the 2006 SGR 1900+14 Storm (2009)

Abbott, B. P., Abbott, R., Adhikari, R., Ajith, P., Allen, B., Allen, G., ...

We present the results of a LIGO search for short-duration gravitational waves (GWs) associated with the 2006 March 29 SGR 1900+14 storm. A new search method is used, "stacking" the GW data around...

A report on the indoor residual spraying (IRS) in the control of Phlebotomus argentipes, the vector of visceral leishmaniasis in Bihar (India): an initiative towards total elimination targeting 2015 (Series-1) (2009)

V. Kumar, S. Kesari, D.S. Dinesh, A.K. Tiwari, A.J. Kumar, R. Kumar, ...

Background & objectives: Visceral leishmaniasis, commonly known as kala-azar is endemic inBihar state, India. Current vector control programme in Bihar focuses mainly on spraying thesandfly infested...

Search for gravitational waves from low mass binary coalescences in the first year of LIGO psila s S5 data (2009)

Abbott, B. P., Abbott, R., Adhikari, R., Ajith, P., Allen, B., Allen, G., ...

We have searched for gravitational waves from coalescing low mass compact binary systems with a total mass between 2M/sub o/ and 35M/sub o/ and a minimum component mass of 1M/sub o/ using data from...

Search for gravitational waves from low mass binary coalescences in the first year of LIGO's S5 data (2009)

Abbott, B. P., Abbott, R., Adhikari, R., Ajith, P., Allen, B., Allen, G., ...

We have searched for gravitational waves from coalescing low mass compact binary systems with a total mass between 2M_([sun]) and 35Mz-([sun]) and a minimum component mass of 1M_([sun]) using data...

Cytological diagnosis of pulmonary nocardiosis in an immunocompromised patient (2008)

Kumar, R, Chhina, DK, Kaushal, V, Mahajan, R, Kaur, H

We report a case of pulmonary nocardiosis in an immunosuppressed patient having vasculitis who presented with fever, cough and chest pain. A suspicion of nocardiosis was made on auramine O staining...

References (2008)

R. Kumar, M. A. Shayman

[3] M. Heymann and F. Lin, 1994. On-line control of partially observed discrete event

Acanthamoeba   encephalitis (2008)

Kaushal, V, Chhina, DK, Kumar, R, Pannu, HS, Dhooria, HPS, Chhina, RS

Central nervous system infection with free-living amoebae is rare. We present a fatal case of Acanthamoeba   encephalitis in a 63-year-old female from India where acanthamoebae were demonstrated and...

Testing of a DSSSD detector for the stopped RISING project (2008)

Kumar, R., Molina, Francisco G., Pietri, S., Casarejos, E., Algora, Alejandro, Benlliure, J., ...

An active stopper for the RISING project at GSI has been developed for beta-decay studies and conversion electron spectroscopy following projectile fragmentation/fission reactions. This system...

Hairy cell leukemia: Clinical, pathological and ultrastructural findings in Asian-Indians (2008)

Chatterjee, T, Panigrahi, I, Mahapatra, M, Pati, HP, Kumar, R, Naithani, R, ...

Background: Hairy-cell leukemia (HCL), lymphoproliferative disease of older age, is characterized by projections from surface of abnormal cells. Aim: The aim was to study the clinical presentation...

Measurement of azimuthal asymmetries in inclusive production of hadron pairs in e^+e^- annihilation at √s = 10.58 GeV (2008)

Seidl, R., Grosse Perdekamp, M., Ogawa, A., Adachi, I., Aihara, H., Bahinipati, S., ...

The Collins effect connects transverse quark spin with a measurable azimuthal asymmetry in the yield of hadronic fragments around the quark’s momentum vector. Using two different reconstruction...

Relation of stump length with various gait parameters in trans-tibial amputees (2008)

Majumdar, Koyel, Lenka, P.K., Mondal, R.K., Kumar, R., Triberwala, D.N.

The purpose of this paper is evaluating the impact of stump length of unilateral below knee amputees (BKA) on different gait parameters. Nine unilateral BKA were chosen and divided into three groups...

Observation of $B^{\pm} \to \psi(2S) \pi^{\pm}$ and search for direct CP-violation (2008)

Bhardwaj, V., Kumar, R., Singh, J. B., Collaboration, For The Belle

We report the first observation of $B^{\pm}\to\psi(2S)\pi^{\pm}$, a Cabibbo- and color-suppressed decay. This analysis is based on $657\times10^{6}$ $B\overline B$ events collected at the...

References (2008)

Number Of Students, M. Adler, R. Kumar, K. W. Ross, D. Rubenstein, T. Suel, ...

Performance evaluation of download peer-to-peer networks Today, Internet traffic is dominated by web (46 %) and P2P (37 %) traffic. BitTorrent is a popular P2P protocol for distributing large files....

Code Compression for RISC Processors with Variable Length Instruction Encoding (2008)

S. S. Gupta, D. Das, R. Kumar, P. P. Chakrabarty

Most of the work done in the field of code compression pertains to processors with fixed length instruction encodings. In this work use code compression on variable length embedded RISC processors...

Experimental Studies on Pressure Control Using Intelligent PI Fuzzy Supervisory Approach (2008)

Sivashanmugam, Palani, Kanagaraj, N., Kumar, R.

Fuzzy supervisory control scheme for regulating the tank pressure in a pilot pressure control system has been presented. The controller structure has been designed in such a way as to adjust on-line...

Experimental Studies on Pressure Control Using Intelligent PI Fuzzy Supervisory Approach (2008)

Sivashanmugam, Palani, Kanagaraj, N., Kumar, R.

Fuzzy supervisory control scheme for regulating the tank pressure in a pilot pressure control system has been presented. The controller structure has been designed in such a way as to adjust on-line...

Experimental Studies on Pressure Control Using Intelligent PI Fuzzy Supervisory Approach (2008)

Sivashanmugam, Palani, Kanagaraj, N., Kumar, R.

Fuzzy supervisory control scheme for regulating the tank pressure in a pilot pressure control system has been presented. The controller structure has been designed in such a way as to adjust on-line...

Video Flashlights – Real Time Rendering of Multiple Videos for Immersive Model Visualization (2008)

P. Debevec, S. Gibson (editors, H. S. Sawhney, A. Arpa, R. Kumar, S. Samarasekera, ...

Videos and 3D models have traditionally existed in separate worlds and as distinct representations. Although texture maps for 3D models have been traditionally derived from multiple still images,...

International Journal of Epidemiology O International Epldemtologlcal Association 1996 Statistical Choropleth Cartography (2008)

In Epidemiology, A Indrayan, R Kumar

Background. The potential of maps in the study of regional variation and similarity in health and in understanding the underlying processes is being increasingly realized. It has thus become...

Structure–activity relationships using locally linear embedding assisted by support vector and lazy learning regressors, Internet (2008)

Ovidiu Ivanciuc, Bhaskar D. Kulkarni, Biochem Press, R. Kumar, A. Kulkarni, V. K. Jayaraman, ...

Motivation. Structure–activity relationships are characterized by large dimensions and conventional procedures become protracted while modeling these relationships. To enhance the modeling...

Observation of a Resonancelike Structure in the π^+-Ψ' Mass Distribution in Exclusive B → Kπ^+-Ψ' Decays (2008)

Olsen, S. L., Adachi, I., Aihara, H., Aulchenko, V., Aushev, T., ...

A distinct peak is observed in the π^±Ψ'invariant mass distribution near 4.43 GeV in B→ Kπ^±Ψ' decays. A fit using a Breit-Wigner resonance shape yields a peak mass and width of M = 4433±...

Observation of the Ψ(4415)→ D\bar{D}_2^* (2460) Decay Using Initial-State Radiation (2008)

Pakhlova, G., Adachi, I., Aihara, H., Arinstein, K., Aulchenko, V., Aushev, T., ...

We report measurements of the exclusive cross section for e^+e^- →D^0D^-π^+ over the center-of-mass energy range 4.0 GeV to 5.0 GeV with initial-state radiation and the first observation of the...

Measurement of the near-threshold e^+e^- → D\bar{D} cross section using initial-state radiation (2008)

Pakhlova, G., Adachi, I., Aihara, H., Arinstein, K., Aulchenko, V., Aushev, T., ...

We report measurements of the exclusive cross section for e^+e^ →D\bar{D}, where D=D^0 or D^+, in the center-of-mass energy range from the D\bar{D} threshold to 5 GeV with initial-state...

Observation of e^+e^- → K^+K^-J/Ψ via initial-state radiation at Belle (2008)

Yuan, C. Z., Shen, C. P., Wang, P., Wang, X. L., Adachi, I., Aihara, H., ...

The process e^+e^- →K^+K^-J/Ψ is observed for the first time via initial-state radiation. The cross section of e^+e^- → K^+K^-J/Ψ for center-of-mass energies between threshold and 6.0 GeV is...

Time-Dependent CP-Violating Asymmetry in B^0→p^0γ Decays (2008)

Ushiroda, Y., Sumisawa, K., Taniguchi, N., Adachi, I., Aihara, H., Arinstein, K., ...

We report the first measurement of CP-violation parameters in B^0 → p^0γ decays based on a data sample of 657×10^6B\bar{B} pairs collected with the Belle detector at the KEKB asymmetric-energy...

Effect of Gold Dispersion on the Photocatalytic Activity of Mesoporous Titania for the Vapor-Phase Oxidation of Acetone (2008)

S. V. Awate, A. A. Belhekar, S. V. Bhagwat, R. Kumar, N. M. Gupta

Mesostructured titanium dioxide photocatalyst, having uniform crystallite size (6–12 nm) and average pore diameter of ∼4.2 nm, was synthesized by...

Dynamic slicing of aspect-oriented programs (2008)

Mohapatra, D P, Sahu, M, Kumar, R, Mall, R

Copyright for the paper belongs to the Informatica

Time-Domain Equalization Technique for Intercarrier Interference Suppression in OFDM Systems (2008)

R. Kumar, S. Malarvizhi, S. Jayashri

Orthogonal Frequency Division Multiplexing (OFDM) is a modern high data rate modulation technique for wireless communication systems. Due to loss of orthogonality of subcarriers intercarrier...

Bioconverted Conjugated Linoleic Acid : A Modulator of Functional Immunity (2008)

A. Bhatia, R. Kumar, R. Pawan

The present study was conducted to convert linoleic acid into conjugated linoleic acid by microorganism L. acidophilus MTCC 1473 in vitro and then assess the modulation of functions of various...

Characteristics of hepatocellular carcinoma in India: a retrospective analysis of 191 cases (2008)

Kumar, R., Saraswat, M. Kumar, Sharma, B. Chander, Sakhuja, P., Sarin, S.K.

Background: Hepatocellular carcinoma (HCC) is one of the most common malignant tumors worldwide. The outcome of the disease is related to the stage of presentation. A comprehensive analysis of...

Effect of Gold Dispersion on the Photocatalytic Activity of Mesoporous Titania for the Vapor-Phase Oxidation of Acetone (2008)

S. V. Awate, A. A. Belhekar, S. V. Bhagwat, R. Kumar, N. M. Gupta

Mesostructured titanium dioxide photocatalyst, having uniform crystallite size (6–12 nm) and average pore diameter of ∼4.2 nm, was synthesized by using a low-temperature nonsurfactant...

Expression of ZNF652, a novel zinc finger protein, in vulvar carcinomas and its relation to prognosis (2008)

Holm, Ruth, Knopp, S., Kumar, R., Lee, Jaclyn Siu-Ying, Nesland, J. M., Trope, C., ...

Aims: To determine the levels of expression of ZNF652 and its relevance to prognosis in vulvar squamous cell carcinomas. Methods: 22 cases of vulvar intraepithelial neoplasia (VIN) and tumours from...

Expression of ZNF652, a novel zinc finger protein, in vulvar carcinomas and its relation to prognosis (2008)

Holm, Ruth, Knopp, S., Kumar, R., Lee, Jaclyn Siu-Ying, Nesland, J. M., Trope, C., ...

Aims: To determine the levels of expression of ZNF652 and its relevance to prognosis in vulvar squamous cell carcinomas. Methods: 22 cases of vulvar intraepithelial neoplasia (VIN) and tumours from...

Evolution of Crystallographic Texture during equal channel Angular Extrusion (ECAE) and its effects on secondary processing of magnesium (2007)

Suwas, Satyam, Gottstein, G, Kumar, R

This work addresses the course of texture evolution during different routes of equal channel angular extrusion (ECAE) of magnesium and the effect of ECAE texture on subsequent deformation....

Harvard University, and Industry Corrections to \Finite Bu er Realization of Input-Output Discrete Event Systems" (2007)

R. Kumar, V. K. Garg, S. I. Marcus, Ratnesh Kumar, Vijay K. Garg, Steven I. Marcus

This note presents a correction to [1, Theorem 4] which provides a necessary and su cient condition for dispatchability. 1 Notation The following additional notation is introduced: The notation s L s...

A Framework for Optimal Control of Discrete Event Systems (2007)

S. R. Mohanty, V. Chandra, R. Kumar

A framework for optimal control has been developed for controlling discrete event systems (DESs), where a controller is one that selects unique control actions. Prior work on supervisory control...

Measurement of branching fraction and time-dependent CP asymmetry parameters in B^0 → D^*+D^*-K^{0}_{S}decays (2007)

Dalseno, J., Adachi, I., Aihara, H., Aushev, T., Bakich, A. M., Balagura, V., ...

We present a measurement of the branching fraction and time-dependent CP violation parameters for B^0 → D^*+D^*-K^{0}_{S} decays. These results are obtained from a 414 fb^{-1} data sample that...

Measurements of exclusive B^{0}_{s} decays at the γ(5S) resonance (2007)

Drutskoy, A., Abe, K., Adachi, I., Aihara, H., Anipko, D., Bakich, A. M., ...

Several exclusive B^{O}_{s} decays are studied using a 1.86 fb^{-1} data sample collected at the Υ(5S) resonance with the Belle detector at the KEKB asymmetric energy e^+e^- collider. In the...

Search for B decays into η'p, η'K^*, η'φ, η'ω and η'η^(') (2007)

Schümann, J., Wang, C. H., Abe, K., Aihara, H., Anipko, D., Arinstein, K., ...

We report on a search for the exclusive two-body charmless hadronic B meson decays B → η'ρ, B → η'K^*, B^0 → ηφ, B^0 → η'ω, and B0 →η'η^('). The results are obtained from a data...

Observation of Isomeric Decays in the R-Process Waiting-Point Nucleus Cd-130(82) (2007)

Jungclaus, A, Caceres, L, Gorska, M, Pfutzner, M, Pietri, S, Werner-Malento, E, ...

The gamma decay of excited states in the waiting-point nucleus Cd-130(82) has been observed for the first time. An 8(+) two-quasiparticle isomer has been populated both in the fragmentation of a...

A novel corepressor, BCoR-L1, represses transcription through an interaction with CtBP (2007)

Pagan, JK, Arnold, J, Hanchard, KJ, Kumar, R, Bruno, T, Jones, MJK, ...

Corepressors play a crucial role in negative gene regulation and are defective in several diseases. BCoR is a corepressor for the BCL6 repressor protein. Here we describe and functionally...

Evaluation of safety of increased time interval between chemoradiation and resection for rectal cancer (2006)

Tran, C L, Udani, S, Holt, A, Arnell, T, Kumar, R, Stamos, Michael J

Background: Neoadjuvant chemoradiation is increasingly used for rectal cancer, with resection typically performed 6 weeks after completion of radiotherapy. We observed in our practice that further...

Apparent Solubility of Hydroxyapatite in Aqueous Medium and Its Influence on the Morphology of Nanocrystallites with Precipitation Temperature (2006)

Prakash, K. H., Kumar, R., Ooi, C. P., Cheang, P., Khor, K. A.

Two differing wet-chemical synthesis routes, Ca(OH)2 + H3PO4 and CaCl2 + Na3PO4/NaOH, were used to prepare hydroxyapatite (HA) at various temperatures ranging from 30 to 95 °C. The electrical...

Conductometric Study of Precursor Compound Formation during Wet-Chemical Synthesis of Nanocrystalline Hydroxyapatite (2006)

Prakash, K. H., Kumar, R., Ooi, C. P., Cheang, P., Khor, K. A.

Conductometry was employed to study the phase evolution of calcium phosphate compounds during the wet-chemical synthesis of hydroxyapatite (HA). Calcium hydroxide and orthophosphoric acid were used...

The use of nano-structured hybrid materials for oral drug delivery (2006)

Kumar, R., Hariran, K. P., Cheang, P., Aik, K. K.

We have used a novel hybrid nano-structured sponge to conduct proof of concept studies for the oral delivery of peptides employing insulin as the loaded model drug. The hybrid sponge was synthesized...

Effect of Super Saturation Level on the size and morphology of Hydroxyapatite precipitate (2006)

Prakash, K. H., Ooi, C. P., Kumar, R., Khor, K. A., Cheang, P.

Hydroxyapatite (HA) is synthesized through acid-base reaction by adding an aqueous solution of orthophosphoric acid to an aqueous solution of calcium hydroxide maintained at 40, 80 and 100°C. X-ray...

Apparent Solubility of Hydroxyapatite in Aqueous Medium and Its Influence on the Morphology of Nanocrystallites with Precipitation Temperature (2006)

Prakash, K. H., Kumar, R., Ooi, C. P., Cheang, P., Khor, K. A.

Two differing wet-chemical synthesis routes, Ca(OH)2 + H3PO4 and CaCl2 + Na3PO4/NaOH, were used to prepare hydroxyapatite (HA) at various temperatures ranging from 30 to 95 °C. The electrical...

Conductometric Study of Precursor Compound Formation during Wet-Chemical Synthesis of Nanocrystalline Hydroxyapatite (2006)

Prakash, K. H., Kumar, R., Ooi, C. P., Cheang, P., Khor, K. A.

Conductometry was employed to study the phase evolution of calcium phosphate compounds during the wet-chemical synthesis of hydroxyapatite (HA). Calcium hydroxide and orthophosphoric acid were used...

The use of nano-structured hybrid materials for oral drug delivery (2006)

Kumar, R., Hariran, K. P., Cheang, P., Aik, K. K.

We have used a novel hybrid nano-structured sponge to conduct proof of concept studies for the oral delivery of peptides employing insulin as the loaded model drug. The hybrid sponge was synthesized...

Effect of Super Saturation Level on the size and morphology of Hydroxyapatite precipitate (2006)

Prakash, K. H., Ooi, C. P., Kumar, R., Khor, K. A., Cheang, P.

Hydroxyapatite (HA) is synthesized through acid-base reaction by adding an aqueous solution of orthophosphoric acid to an aqueous solution of calcium hydroxide maintained at 40, 80 and 100°C. X-ray...

Podophyllum hexandrum Offers Radioprotection by Modulating Free Radical Flux: Role of Aryl-Tetralin Lignans (2006)

Chawla, Raman, Arora, Rajesh, Singh, Shikha, Sagar, R. K., Sharma, Rakesh Kumar, Kumar, R., ...

We have evaluated the effect of variation in aryl-tetralin lignans on the radioprotective properties of Podophyllum hexandrum. Two fractionated fractions of P. hexandrum [methanolic (S1) and...

Podophyllum hexandrum Offers Radioprotection by Modulating Free Radical Flux: Role of Aryl-Tetralin Lignans (2006)

Chawla, Raman, Arora, Rajesh, Singh, Shikha, Sagar, R.K., Sharma, Rakesh Kumar, Kumar, R., ...

We have evaluated the effect of variation in aryl-tetralin lignans on the radioprotective properties of Podophyllum hexandrum. Two fractionated fractions of P. hexandrum [methanolic (S1) and...

Podophyllum hexandrum Offers Radioprotection by Modulating Free Radical Flux: Role of Aryl-Tetralin Lignans (2006)

Chawla, Raman, Arora, Rajesh, Singh, Shikha, Sagar, R. K., Sharma, Rakesh Kumar, Kumar, R., ...

We have evaluated the effect of variation in aryl-tetralin lignans on the radioprotective properties of Podophyllum hexandrum. Two fractionated fractions of P. hexandrum [methanolic (S1) and...

Nose bluntness for side-force control on circular cones at high incidence (2005)

Kumar, R, Viswanath, PR, Ramesh, ON

An experimental investigation has been car ked out to study the effect of nose bluntness on the characteristics of vortex asymmetry and induced side forces on slender cone models at low speeds. Two...

ORIGINAL CONTRIBUTIONS - KNOWLEDGE ABOUT TETANUS IMMUNIZATION AMONG DOCTORS IN DELHI (2005)

Kumar, R., Taneja, D. K., Dabas, P., Ingle, G. K., Saha, R.

BACKGROUND: In spite of the clear-cut guidelines regarding tetanus immunization, we have observed that tetanus toxoid injection is often given after injury without considering previous immunization...

Dynamical cluster-decay model for hot and rotating light-mass nuclear systems, applied to low-energy $^{32}$S + $^{24}$Mg $\rightarrow ^{56}$Ni reaction (2005)

K. Gupta, Raj, Balasubramaniam, M., Kumar, R., Singh, D., Beck, C., Greiner, W.

The dynamical cluster-decay model (DCM) is developed further for the decay of hot and rotating compound nuclei (CN) formed in light heavy-ion reactions. The model is worked out in terms of only one...

Dynamical cluster-decay model for hot and rotating light-mass nuclear systems, applied to low-energy $^{32}$S + $^{24}$Mg $\rightarrow ^{56}$Ni reaction (2005)

K. Gupta, Raj, Balasubramaniam, M., Kumar, R., Singh, D., Beck, C., Greiner, W.

The dynamical cluster-decay model (DCM) is developed further for the decay of hot and rotating compound nuclei (CN) formed in light heavy-ion reactions. The model is worked out in terms of only one...

Dynamical cluster-decay model for hot and rotating light-mass nuclear systems, applied to low-energy $^{32}$S + $^{24}$Mg $\rightarrow ^{56}$Ni reaction (2005)

K. Gupta, Raj, Balasubramaniam, M., Kumar, R., Singh, D., Beck, C., Greiner, W.

The dynamical cluster-decay model (DCM) is developed further for the decay of hot and rotating compound nuclei (CN) formed in light heavy-ion reactions. The model is worked out in terms of only one...

On the Kinetics of Apatite Growth on Substrates under Physiological Conditions (2005)

Prakash, K. H., Kumar, R., Yu, S. C., Khor, K. A., Cheang, P.

Derived from reaction kinetics, a simple but useful method, based on “apatite forming capacity” or AFC of solutions mimicking blood plasma, is proposed to decipher the rate of calcium phosphate...

Microstructure and mechanical properties of spark plasma sintered zirconia-hydroxyapatite nano-composite powders (2005)

Kumar, R., Prakash, K. H., Cheang, P., Khor, K. A.

ZrO2-hydroxyapatite composites spark plasma sintered (SPS) at 1075 ± 25°C involve inter and intra particle porosities. The porosity level in the compacts (

Hydroxyapatite-Chitosan Hybrid Nano-Materials (2005)

Kumar, R., Prakash, K. H., Lim, K. G., Kiat, N. H., Yennie, K., Cheang, P., ...

Self-assembled nano-materials are currently an area of research with high throughput due to the opportunities it provides to fields ranging from semiconductor engineering to gene delivery. There is...

Synthesis and Characterisation of Hydroxyapatite Nano-Rods/Whiskers (2005)

Kumar, R., Prakash, K. H., Yennie, K., Cheang, P., Khor, K. A.

The use of precipitation chemistry to synthesize hydroxyapatite (HA) normally yields nano-crystals with various morphology and sizes depending on the synthesis conditions (e.g., temperature,...

On the Kinetics of Apatite Growth on Substrates under Physiological Conditions (2005)

Prakash, K. H., Kumar, R., Yu, S. C., Khor, K. A., Cheang, P.

Derived from reaction kinetics, a simple but useful method, based on “apatite forming capacity” or AFC of solutions mimicking blood plasma, is proposed to decipher the rate of calcium phosphate...

Microstructure and mechanical properties of spark plasma sintered zirconia-hydroxyapatite nano-composite powders (2005)

Kumar, R., Prakash, K. H., Cheang, P., Khor, K. A.

ZrO2-hydroxyapatite composites spark plasma sintered (SPS) at 1075 ± 25°C involve inter and intra particle porosities. The porosity level in the compacts (

Hydroxyapatite-Chitosan Hybrid Nano-Materials (2005)

Kumar, R., Prakash, K. H., Lim, K. G., Kiat, N. H., Yennie, K., Cheang, P., ...

Self-assembled nano-materials are currently an area of research with high throughput due to the opportunities it provides to fields ranging from semiconductor engineering to gene delivery. There is...

Synthesis and Characterisation of Hydroxyapatite Nano-Rods/Whiskers (2005)

Kumar, R., Prakash, K. H., Yennie, K., Cheang, P., Khor, K. A.

The use of precipitation chemistry to synthesize hydroxyapatite (HA) normally yields nano-crystals with various morphology and sizes depending on the synthesis conditions (e.g., temperature,...

Efficient Implementation of Large-Scale Multi-Structural Databases (2005)

R. Fagin, Ph. Kolaitis, R. Kumar, J. Novak, D. Sivakumar, A. Tomkins

In earlier work, we defined "multi-structural databases," a data model to support efficient analysis of large, complex data sets over multiple numerical and hierarchical dimensions. We...

Efficient implementation of large-scale multi-structural databases (2005)

R. Fagin, Ph. Kolaitis, R. Kumar, J. Novak, D. Sivakumar, A. Tomkins

In earlier work, we defined “multi-structural databases, ” a data model to support efficient analysis of large, complex data sets over multiple numerical and hierarchical dimensions. We defined...

Techniques based on genetic algorithms for large deflection analysis of beams (2004)

Kumar, R, Ramachandra, LS, Roy, D

A couple of non-convex search strategies, based on the genetic algorithm, are suggested and numerically explored in the context of large-deflection analysis of planar, elastic beams. The first of...

Original Article - Does I-131-MIBG underestimate skeletal disease burden in neuroblastoma? (2004)

Barai, S., Bandopadhayaya, G. P., Malhotra, A., Agarwal, S., Kumar, R., Dhanapathi, H.

Background: Controversy persists as to the need for both MIBG and bone scanning in routine evaluation of neuroblastoma. Aim: To compare the efficacy of I-131- metaiodobenzylguanidine (MIBG) scan...

Temperature Driven Morphological Changes of Chemically Precipitated Hydroxyapatite Nanoparticles (2004)

Kumar, R., Prakash, K. H., Cheang, P., Khor, K. A.

Hydroxyapatite (HA) is synthesized by a wet chemical route using calcium hydroxide and ortho-phosphoric acid at various temperatures (40, 80, and 100 °C). X-ray diffraction of the precipitate...

Temperature Driven Morphological Changes of Chemically Precipitated Hydroxyapatite Nanoparticles (2004)

Kumar, R., Prakash, K. H., Cheang, P., Khor, K. A.

Hydroxyapatite (HA) is synthesized by a wet chemical route using calcium hydroxide and ortho-phosphoric acid at various temperatures (40, 80, and 100 °C). X-ray diffraction of the precipitate...

Linear Model Hashing and Batch RANSAC for Rapid and Accurate Object Recognition (2004)

Y. Shan, B. Matei, H. S. Sawhney, R. Kumar, D. Huber, M. Hebert

This paper proposes a joint feature-based model indexing and geometric constraint based alignment pipeline for efficient and accurate recognition of 3D objects from a large model database....

Laparoscopic Swenson procedure - An optimal approach for both primary and secondary pull-through for Hirschsprung's disease (2003)

Kumar, R, Mackay, A, Borzi, P

Background/Purpose: Several pull-through procedures are available for the surgical management of Hirschsprung's disease (HD) in children. The authors have adopted a laparoscopic approach since 1995,...

in (2003)

A. K. Turuk, R. Kumar, R. Badrinath

A token-based distributed algorithm for medium access

A Token Based Distributed Algorithm for Medium Access in an Optical Ring Network (2003)

A. K. Turuk, R. Kumar, R. Badrinath

Abstract. In this paper we propose a token based algorithm to access the shared medium in an optical ring network. The algorithm is based on reservation scheme. However, unlike other reservation...

CASE REPORT: MANAGING FRACTURES IN NON-COMPLIANT ALCOHOLIC PATIENTS -- A CHALLENGING TASK (2003)

Charalambous, C. P., Zipitis, C. S., Kumar, R., Hirst, P., Paul, A. S.

Aims: To investigate whether there are extractable conclusions for limb fracture management in dependent alcoholics. Methods: We discuss four cases of dependent alcoholics who presented in our...

Improved sampling of the pareto-front in multiobjective genetic optimizations by steady-state evolution: a Pareto converging genetic algorithm (2002)

Kumar, R., Rockett, P.

Previous work on multiobjective genetic algorithms has been focused on preventing genetic drift and the issue of convergence has been given little attention. In this paper, we present a simple...

50 MeV Li3+ irradiation effects on the thermal expansion of Ca1âxSrxZr4P6O24 (2002)

Angadi, B, Jali, VM, Lagare, MT, Kini, NS, Umarji, AM, Kumar, R, ...

The influence of 50 MeV Li3+ ion irradiation on the thermal expansion of the low thermal expansion ceramic Ca1-xSrxZr4P6O24 (x = 0.00, 0.25,0.50, 0.75 and 1.00) belonging to the sodium zirconium...

50 MeV $Li^{3+}$ irradiation effects on the thermal expansion of $Ca_{1-x}Sr{_x}Zr{_4}P{_6}O_{24}$ (2002)

Angadi, B, Jali, VM, Lagare, MT, Kini, NS, Umarji, AM, Kumar, R, ...

The influence of 50 MeV Li3+ ion irradiation on the thermal expansion of the low thermal expansion ceramic Ca1-xSrxZr4P6O24 (x = 0.00, 0.25, 0.50, 0.75 and 1.00) belonging to the sodium zirconium...

Passive control of surface pressure fluctuations in reattaching flows (2002)

Kumar, R, Viswanath, PR

Experiments assessing the effectiveness of passive control involving a porous surface and cavity underneath for reducing the level of surface pressure fluctuations in reattaching flows are reported....

Evaluation of informed consent (IC) (2002)

Sachdeva, A., Gupta, S., Soni, A., Kumar, R., Gupta, D., Raina, A., ...

IC as a method of communication and participation has been used for the last 10 years in our Ped. Onco. unit. In the last 3 years we have looked at the parents comprehension & satisfaction of IC....

Laparoscopic appendectomy in modern gynecology (2002)

Kumar, R, Erian, M, Sinnot, S, Knoesen, R, Kimble, R

Gynecologists frequently manage women with acute or chronic pain in the right iliac fossa. Appendicitis is one of the common conditions encountered in this setting. From the gynecologic perspective,...

Modeling Discrete Event Systems with Faults Using a Rules based Modeling Formalism (2002)

Z. Huang, V. Chandra, S. Jiang, R. Kumar

Obtaining accurate models of systems which are prone to failures and breakdowns is a dicult task. In this paper we present a methodology which makes the task of modeling failure prone discrete event...

Modelling of protein mixture separation in a batch foam column (2001)

Bhattacharjee, Samita, Kumar, R, Gandhi, KS

Separation of proteins from their binary mixtures has been investigated using static foams. It is seen that for the two binary mixtures investigated (BSA–casein, BSA–lysozyme), adsorption is...

A New Modeling Formalism and Automata Model Generator for a Class of Discrete Event Systems (2001)

V. Chandra, R. Kumar

The control of discrete event systems (DESs) requires a correct model of the system and of its control specications. In this paper we present a new modeling formalism for generating valid models of...

A Discrete Event Systems Modeling Formalism Based on Event Occurrence Rules and Precedences (2001)

V. Chandra, R. Kumar, Senior Member

The analysis (veri cation, diagnosis, control, etc.) of discrete event systems requires a correct model of the system and of its speci cations. In this paper we present a new modeling formalism for...

A Event Occurrence Rules based Compact Modeling Formalism for a class of Discrete Event Systems (2001)

V. Chandra, R. Kumar

The analysis, failure diagnosis and control of discrete event systems (DESs) requires an accurate model of the system. In this paper we present a methodology which makes the task of modeling DESs...

MAVs: A Brief Summary (2000)

Kumar, R

Last decade has witnessed a strong interest in the understanding of aerodynamics in the low Re regime (104 to 106) mainly due to the increasing importance of Unmanned Aerial Vehicles UAVs and Micro...

Wave climatology of the Indian Ocean derived from altimetry and wave model (2000)

Vethamony, P., Rao, L.V.G., Kumar, R., Sarkar, A., Mohan, M., Sudheesh, K., ...

GEOSAT altimeter data for the period 1986-1989 have been utilised to derive wave climatology for the Indian Ocean region bounded by 20 degrees S to 25 degrees N and 40 degrees E to 110 degrees E. The...

Automated Control Synthesis for an Assembly Line using Discrete Event System Control Theory (2000)

V. Chandra, S. R. Mohanty, R. Kumar

Modern machining and assembly facilities require a great deal of operational exibility owing to the rapidly changing manufacturing environments they exist in. Currently the task of controller design...

Heat exposure study in the workplace in a glass manufacturing unit in India (2000)

Srivastava, A., Kumar, R., Joseph, E., Kumar, A.

The heat exposure for working conditions in coastal areas of tropical and subtropical countries like India is a crucial factor in improved qualitative and quantitative production. The hot climate...

Water blown free rise polyurethane foams (1999)

Niyogi, Debdarsan, Kumar, R, Gandhi, KS

A model is developed in this work for predicting the bubble size distribution in polyurethane foams generated by using water as a chemical blowing agent. The model combines equations of energy...

Computer-Integrated Revision Total Hip Replacement Surgery: Concept and Preliminary Results. Medical Image Analysis (1999)

Russell H. Taylor, Leo Joskowicz, B. Williamson, A. Guéziec, A. Kalvin, P. Kazanzides, ...

This paper describes an ongoing project to develop a computer-integrated system to assist surgeons in revision total hip replacement (RTHR) surgery. In RTHR surgery, a failing orthopaedic hip...

A Computer Implementable Algorithm for the Synthesis of an Optimal Controller for Acyclic Discrete Event Processes (1999)

S. R. Mohanty, V. Chandra, R. Kumar

In this paper, an optimal control theory for designing a controller, that selects unique control actions is developed for controlling discrete event systems (DESs). Prior work on supervisor synthesis...

Brief report. Ocular extramedullary myeloid cell tumour in children: an Indian study (1999)

Gujral, S, Bhattari, S, Mohan, A, Jain, Y, Arya, LS, Ghose, S, ...

Thirty-two children with extramedullary meloid cell tumour (EMT) who constituted 41 per cent of children with acute myeloid leukaemia (AML) were studied to ascertain their laboratory characteristics...

Prognostic value of serum C-reactive protein in kala-azar (1999)

Singh, UK, Patwari, AK, Sinha, RK, Kumar, R

The currently recommended protocol for treatment of kala-azar (KA) necessitates repeated bone marrow/splenic aspiration to monitor the response and duration of therapy as well as to detect resistance...

Alternative mechanisms of drop breakup in stirred vessels (1998)

Kumar, Sanjeev, Ganvir, Vivek, Satyanand, C, Kumar, R, Gandhia, KS

Kumar el al. (1991, Chem. Engng Sci. 46, 2483-2489) have shown that in a stirred vessel, size of the largest stable drop, d(max), first increases with phi (holdup of the dispersed phase) at low phi,...

Performance of the corDECT Voice/Data Wireless Local Loop (1998)

A. Balaji, Timothy A. Gonsalves, R. Kumar

The traditional wired local loop used to connect each telephone subscriber to the nearest exchange is expensive and unreliable. Wireless Local Loop (WLL) systems largely eliminate these copper wires...

Robust video mosaicing through topology inference and local to global alignment (1998)

Harpreet S. Sawhney, Steve Hsu, R. Kumar

Abstract. The problem of piecing together individual frames in a video sequence to create seamless panoramas (video mosaics) has attracted increasing attention in recent times. One challenge in this...

Robust Video Mosaicing through Topology Inference and Local to Global Alignment (1998)

Harpreet S. Sawhney, Steve Hsu, R. Kumar

. The problem of piecing together individual frames in a video sequence to create seamless panoramas (video mosaics) has attracted increasing attention in recent times. One challenge in this domain...

Breast cancer diagnosis using N2 laser excited autofluorescence spectroscopy,’’ Lasers Surg. Med (1997)

S. K. Majumder, R. Kumar, N. Ghosh, P. K. Gupta

We report results of an in-vitro autofluorescence spectroscopic study on formalin-fixed human breast tissue samples. The study involved tissue samples from 20 patients with breast cancer who...

Mutually Nonblocking Supervisory Control of Discrete Event Systems (1997)

M. Fabian, R. Kumar

For discrete event systems, modular supervisory control refers to modular design of a supervisor when multiple control specifications are given. This problem has been studied for the case when the...

Factors Influencing Psychosocial Development of Preschool Children in a Rural Area of Haryana, India (1997)

Kumar, R., Aggarwal, A. K., Kaur, M., Iyengar, S. D.

In a cross-sectional survey, 3746 children aged less than 6 years residing in 47 randomly selected villages of district Ambala (India), were studied to find out the environmental risk factors...

Analysis of water management in Sirsa District in Haryana; model testing and application (1996)

Boels, D., Jhorar, R.K., Kumar, R., Singh, J.

Through model simulations different managerial solutions were evaluated for increasing waterlogging and secondary salinization in irrigated areas without sufficient natural drainage and suitable...

Applicability of Formal Synthesis Illustrated via Scheduling (1996)

Christian Blumenröhr, Dirk Eisenbiegler, R. Kumar, Forschungszentrum Informatik

This paper describes a novel technique for formal synthesis and exemplifies the main ideas using the high level synthesis task --- scheduling. The novelty of the approach is based on the fact, that...

Statistical Choropleth Cartography in Epidemiology (1996)

INDRAYAN, A, KUMAR, R

Background The potential of maps in the study of regional variation and similarlity in health and in understanding the underlying processes is being increasingly realized. It has thus become...

Abnormalities of the vitamin D receptor in uraemia (1996)

Kumar, R.

The 1,25-dihydroxyvitamin D3 (1,25(OH)2D3) receptor mediates many of the actions of 1,25(OH)2D3 in cells of target tissues. Abnormalities in vitamin D receptor concentration and regulation exist in...

The cytostatic activity of 5-(1-azidovinyl)-2'-deoxyuridine (AzVDU) against herpes simplex virus thymidine kinase gene-transfected FM3A cells is due to inhibition of thymidylate synthase and enhanced by UV light (lambda = 254 nm) exposure (1995)

Kumar, R, Knaus, E E, Wiebe, L I

5-(1-Azidovinyl)-2'-deoxyuridine (AzVDU) and a series of 5-[1-azido-2-halogenoethyl]-derivatives of beta-D-arabinofuranosyluracil (AU) proved markedly inhibitory to the replication of herpes simplex...

Analysis of Ultrasonically Enhanced Hydrogen Evolution for $Zn-NiCl_2$ System (1995)

Banerjee, Sukanta, Kumar, R, Gandhi, KS

Sonication has been found to influence significantly the rate of hydrogen evolution from a $Zn-NiCl_2$ (aqueous) system. The evolution of hydrogen is the result of pit corrosion experienced by zinc,...

Dissolution of particles of pyrite mineral by direct attachment of Thiobacillus ferrooxidans (1995)

Shrihari, *, Modak, Jayant M, Kumar, R, Gandhi, KS

Shake flask experimentson the leaching of particles of pyrite mineral with Thiobacillusferrooxidans indicate that, under conditions of large particle sizes and high pulp density, the dissolution...

A Network Model of Static Foam Drainage (1995)

Gururaj, M, Kumar, R, Gandhi, KS

On the basis of a more realistic tetrakaidecahedral structure of foam bubbles, a network model of static foam drainage has been developed. The model considers the foam to be made up of films and...

Formal specification and verification techniques for RISC pipeline conflicts (1995)

Tahar, S., Kumar, R.

We outline a general methodology for the formal verification of instruction pipelines in RISC cores. The different kinds of conflicts, i.e. resource, data and control conflicts that can occur due to...

Control Path Oriented Verification of Sequential Generic Circuits with Control and Data Path (1994)

K. Schneider, Th. Kropf, R. Kumar, Forschungszentrum Informatik Fzi

Usually, digital circuits are split up into control and data path as there are specific synthesis methods for controllers and operation units. However, all known approaches to hardware verification...

Geosat altimeter derived sea surface wind speeds and significant wave heights for the north Indian Ocean and their comparison with in situ data (1994)

Vethamony, P., Vaithiyanathan, R., Almeida, A.M., Santanam, K., Rao, L.V.G., Sarkar, A., ...

Geosat altimeter data for the period November 1986-October 1987 over the north Indian Ocean have been processed to retrieve wind speeds and significant wave heights. Smoothed Brown algorithm is used...

Dissolution of Sulphur Particles by Thiobaci//us ferrooxidans: Substrate for Unattached Cells (1993)

Bhavaraju, Shrihari SR, Modak, Jayant M, Kumar, R, Gandhi, KS

The growth of Thiobacillus ferrooxidans on sulphur is known to proceed through the attachment of cells to the sulphur particles. Experiments, However, show that the cells in the liquid phase, which...

Stirred vessel - a practitioner's delight but a theorist's nightmare (1993)

Kumar, R

The complex processes occurring in a stirred vessel are discussed. The mechanism of drop breakage and the distribution of droplets in the medium are examined. The three dimensional problem of drop...

A Formalization of a Hierarchical Model for RISC Processors (1993)

Sofiène Tahar, R. Kumar

. Since microprocessors are used in many areas of real-time control, the use of formal methods provides an alternative approach for achieving high reliability. In this paper, a methodology based on a...

Modeling of bubble-size distribution in free rise polyurethane foams (1992)

Niyogi, Debdarsan, Kumar, R, Gandhi, KS

The existing models of the foaming process in reaction injection molding are inadequate for predicting the bubble-size distribution, which influences many properties of interest. This work attempts...

First Steps Towards Automating Hardware Proofs in HOL (Extended Abstract) (1991)

R. Kumar, Ramayya Kumar, Thomas Kropf, Klaus Schneider

) Ramayya Kumar, Thomas Kropf, Klaus Schneider University of Karlsruhe, Institute of Computer Design and Fault Tolerance (Prof. Dr. ##. Schmid) P.O. Box 6980, W-7500 Karlsruhe, Germany 1....

Endogenous formation of N-nitrosamines from piperazine and their urinary excretion following antihelmintic treatment with piperazine citrate (1991)

Tricker, A.R., Kumar, R., Siddiqi, M., Khuroo, M.S., Preussmann, R.

Antihelmintic treatement with piperazine (1,4-diazacyclohexane) for microfilarie parasitism results in the endogenous formation of piperazine-derived N-nitrosamines. Tbe urinary excretion of these...

Breakage and coalescence of drops in turbulent stirred dispersions (1990)

Nambiar, DKR, Kumar, R, Gandhi, KS

The various existing models for predicting the maximum stable drop diameter $d_{max}$ in turbulent stirred dispersions have been reviewed. Variations in the basic framework dictated by additional...

Chemical engineering and the development of hot superconductors (1990)

Kumar, R

This paper reports on developments in the field of high-temperature superconductors.^The author focuses on progress and problems in the processing of basic ceramics which are of interest to chemical...

An elongational flow model for drop breakage in stirred turbulent dispersions (1990)

Gandhi, KS, Kumar, R

The value of the average drop size in a stirred liquid-liquid dispersion is required for the analysis of rate processes occurring in it. This is normally achieved through the determination of the...

Space Administration (1990)

R. Kumar, R. Kumar

Reference herein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise, does not constitute or imply its endorse-ment by the United States...

Formulas For Calculating Supremal Controllable And Normal Sublanguages (1990)

R. D. Brandt, V. Garg, R. Kumar, F. Lin, S.I. Marcus, W.M. Wonham

Supremal controllable and normal sublanguages have been shown to play an important role in supervisor synthesis. In this paper, we discuss the computation of supremal controllable and normal...

Should chemical engineers warm up to hot superconductors? (1989)

Kumar, R

The field of high T sub c superconductors is changing very fast. It is generally accepted that their applications on a large scale are many years away. From the present state of techniques used in...

Effect of drag-reducing agents on drop breakage in stirred dispersions (1989)

Koshy, Abraham, Kumar, R, Gandhi, KS

The maximum stable drop sizes, $^dmax,$ formed in turbulent stirred dispersions were found to increase significantly on addition of a drag-reducing agent (DRA) to the continuous phase. Two models...

Enhancement of organic phase controlled extraction of copper by activated carbon (1988)

Kelekar, NS, Kumar, R, Mukherjee, AK

The addition of activated carbon particles (Darco-G, average size 4.3,μm) is shown to enhance the initial rate of extraction of copper in a Lewis cell by a mixture of α- and β-hydroxyoximes, when...

Foam separation of microbial cells (1988)

Parthasarathy, S, Das, TR, Kumar, R, Gopalakrishnan, KS

Batch foam separation has been employed to separate Saccharomyces carlsbergensis cells from their broth without the use of any external surface-active agent. A model has been developed to predict the...

Space Administration (1988)

R. Kumar

Through an agreement with

Breakage of viscoelastic drops in turbulent stirred dispersions (1988)

Koshy, Abraham, Das, TR, Kumar, R, Gandhi, KS

The existing models of drop breakage in stirred turbulent dispersions are applicable only to purely viscous dispersed phases. In their present form, they are found to underpredict the diameters of...

Effect of surface resistance arising due to surfactant on gas absorption accompanied by a chemical reaction in a foam-bed-reactor (1987)

Biswas, Jyotirmay, Asolekar, Shyam R, Kumar, R

On the basis of an idealized foam bed, a model to predict conversion in a foam-bed-reactor contg. surfactant was developed. The model takes into account the effect of surface resistance, arising due...

A Theory for the Enhancement of the Photoacoustic Signals by Volatile Liquids (1987)

Srinivasan, J, Kumar, R, Gandhi, KS

It has been shown experimentally that photoacoustic signals can be enhanced by introduction of a volatile liquid into the cell. Korpiun developed a theory which predicted the enhancement to be...

Mass transfer accompanied by a chemical reaction in an emulsion foam bed reactor (1987)

Bhaskarwar, Ashok N, Kumar, R, Gandhi, KS

Mass transfer accompanied by a chemical reaction in an emulsion foam bed reactor

Drop Formation under Pulsed Conditions (1986)

Yaparpalvi, R, Das, PK, Mukherjee, AK, Kumar, R

Drop formation from single nozzles under pulsed flow conditions has been investigated. A model, starting from the unified theory of bubble and drop formation, has been developed to predict drop sizes...

Breakage of viscous and non-Newtonian drops in stirred dispersions (1986)

Lagisetty, JS, Das, PK, Kumar, R, Gandhi, KS

A model of breakage of drops in a stirred vessel has been proposed to account for the effect of rheology of the dispersed phase. The deformation of the drop is represented by a Voigt element. A...

Some experimental observations on recirculating semi-batch foam columns (1985)

Desai, Dilip, Kumar, R

Cellular foams have many possible uses[l-51. They also occur on distillation and absorption trays[6-8]. Consequently, over the past few decades, they have attracted considerable engineering...

Gas-liquid interfacial area in stirred vessels: The effect of an immiscible liquid phase (1985)

Das, TR, Bandopadhyay, A, Parthasarathy, R, Kumar, R

The presence of an inert immiscible organic phase in gas—liquid dispersions in stirred vessels influences the interfacial area in a more complex fashion than hitherto reported. As the organic...

Oxidation of sodium sulphide in a foam bed contactor (1984)

Bhaskarwar, Ashok, Kumar, R

Oxidation of sodium sulphide to sodium thiosulphate has been experimentally investigated in a foam bed contactor using air as the oxidizing medium. The variables studied are superficial air velocity,...

Adenylate and Nicotinamide Nucleotides in Developing Wheat Grains (1984)

KUMAR, R., SINGH, R.

Contents of ATP and ADP per grain increased during grain development up to 21–35 d after anthesis (DAA). A sharp increase in AMP level was observed at 42 DAA. Of the four nicotinamide nucleotides,...

Gamma-rays and EMS-induced male-sterile mutants in Hordeum vulgare (1983)

Kumar, R., Singh, G.

Five male-sterile mutants in a six-rowed bailey (Hordeum vulgare L. Var. Jyoti) were screened from 20 and 25 KR gamma-ray-treated populations and 0.2 percent EMS-treated M2 populations. The male...

Plasma copper and zinc levels in pulmonary tuberculosis (1982)

Khanna, B.K., Kumar, R., Mukerji, P.K., Chowdhury, A.R., Kamboj, V.P.

A study of plasma copper and zinc level was conducted in 46 normal subjects and 94 patients of pulmonary tuberculosis. 64 patients had received specific anti-tuberculosis therapy for over one month...

An experimental study of oxidation of zinc sulphide pellets (1982)

Rao, Rajeswara T, Kumar, R

Oxidation of zinc sulphide pellets is carried out in the ranges of 600-826°C temperature, 0.3-0.5 porosity and 15-50 minutes of reaction time. An experimental technique is employed to simultaneously...

Demonstration of acid fast bacilli in sputum (1979)

Kumar, R., Agarwal, Mithlesh, Prasad, M.

The present study was carried out to compare the diagnostic efficacy of Z.N. method, fluorescent microscopy and culture method in diagnosis of pulmonary tuberculosis.

Effect of the Size of Training Samples on Classification Accuracy (1977)

Kumar, R., Niero, M., Barros, M. S. S., Lucht, L. A. M., Manso, A. P.

Cloud free multispectral scanner (MSS) data of LANDSAT were analysed for studying the effect of the size of training samples on classification accuracy over the following test sites: Sao Jose dos...

Reflectance Model of a Plant Leaf (1973)

Kumar, R., Silva, L.

A light ray, incident at about 5° to the normal, is geometrically plotted through the drawing of the cross section of a soybean leaf wing Fresnel's Equations and Snell's Law. The optical mediums of...

Statistical Separability of Spectral Classes of Blighted Corn (1973)

Kumar, R., Silva, L.

The purpose of this study was to determine the statistical separability of multispectral measurements from corn having varying levels of southern corn leaf blight severity. Multispectral scanner data...

Light Ray Tracing through a Leaf Cross Section (1972)

Kumar, R., Silva, L.

A light ray, incident at about 5° to the normal, is geometrically plotted through the drawing of the cross section of a soybean leaf wing Fresnel's Equations and Snell's Law. The optical mediums of...

Multiple sclerosing haemangiomas of the lung.

Joshi, K., Shankar, S. K., Gopinath, N., Kumar, R., Chopra, P.

A case of mulitple sclerosing haemangiomas of the lung is described from a 40-year-old woman, who presented with haemoptysis. A chest X-ray revealed multiple circumscribed coin lesions in both lungs....

Tuberculosis in maintenance haemodialysis patients. Study from an endemic area.

Malhotra, K. K., Parashar, M. K., Sharma, R. K., Bhuyan, U. N., Dash, S. C., Kumar, R., ...

One hundred and fifty patients requiring maintenance haemodialysis were investigated to determine the incidence and pattern of tuberculosis. Twenty patients were found to have tuberculosis, giving an...

Japanese encephalitis--an important cause of acute childhood encephalopathy in Lucknow, India.

Kumar, R., Mathur, A., Kumar, A., Sharma, S., Saksena, P. N., Chaturvedi, U. C.

Eighty-six randomly selected children between 6 months and 12 years of age admitted with acute unexplained encephalopathy over a one year period were examined for evidence of Japanese encephalitis....

Evaluation of the WHO clinical decision rule for streptococcal pharyngitis

Rimoin, A, Hamza, H, Vince, A, Kumar, R, Walker, C, Chitale, R, ...

Aims: To prospectively assess the WHO clinical decision rule (CDR) for group A beta haemolytic streptococcal (GABHS) pharyngitis in three countries.

Tuberculous meningitis in BCG vaccinated and unvaccinated children

Kumar, R, Dwivedi, A, Kumar, P, Kohli, N

Background: A modified clinical presentation of tuberculous meningitis (TBM) in children vaccinated with BCG has been described in the literature. However, most reports are old and not based on...

Chitosan-mediated crystallization and assembly of hydroxyapatite nanoparticles into hybrid nanostructured films

Kumar, R, Prakash, K.H, Cheang, P, Gower, L, Khor, K.A

The synthesis and subsequent assembly of nearly spherical nano-hydroxyapatite (nHA) particles in the presence of trace amounts of the polysaccharide chitosan was carried out employing a wet chemical...

Kala-azar epidemic in Varanasi district, India.

Kumar, R., Kumar, P., Chowdhary, R. K., Pai, K., Mishra, C. P., Kumar, K., ...

Reports at the Sir Sunder Lal Hospital, Banaras Hindu University, of a large number of kala-azar cases from one particular village in Varanasi district, Uttar Pradesh, led us to carry out an...

Group A streptococcal sore throat in a periurban population of northern India: a one-year prospective study.

Nandi, S., Kumar, R., Ray, P., Vohra, H., Ganguly, N. K.

OBJECTIVE: To estimate the incidence and risk factors of group A streptococcus (GAS) sore throat among school-aged children living in a periurban slum area of Chandigarh, North India. METHODS: A...

Phosphorylation of the ErbB3 binding protein Ebp1 by p21-activated kinase 1 in breast cancer cells

Akinmade, D, Talukder, A H, Zhang, Y, Luo, W-m, Kumar, R, Hamburger, A W

The ErbB3 binding protein (Ebp1) is a transcriptional corepressor that inhibits the activity of proliferation-associated genes and the growth of human breast cancer cell lines. Treatment of breast...

Epidermal Inclusion Cyst of the Styloid Process: A Case Report

Nair, D.R., Pai, P.S., Chaturvedi, P., Kumar, R., Juvekar, S.L.

We report an unusual case of epidermal inclusion cyst of the styloid process which presented to us with decreased hearing and tinnitus. The patient underwent complete excision via a combined...