Tuning the conductance of Dirac fermions on the surface of a topological insulator (2009)
Mondal, S., Sen, D., Sengupta, K., Shankar, R.
We study the transport properties of the Dirac fermions with Fermi velocity $v_F$ on the surface of a topological insulator across a ferromagnetic strip providing an exchange field ${\mathcal J}$...
D. Sen, R. Dasgupta, S. Chakrabarti
This paper presents an efficient time-domain coarse frequency offset (FO) synchronizer (TCFS) for multi-band orthogonal frequency division multiplexing (MB-OFDM) systems effective for practical...
Temporally localized distortions account for the highest variance in subjective evaluation of coded speech signals (Sen (2001) and Hall (2001)). The ability to discern and decompose perceptually...
Temporally localized distortions account for the highest variance in subjective evaluation of coded speech signals (Sen (2001) and Hall (2001)). The ability to discern and decompose perceptually...
D. Sen, W. Li, D. Chung, P. Lam
This paper explores two specific parameters in cochlear implant processors in terms of their effect on consonant and vowel recognition rates. The two parameters in our study are the compression...
APPUNU, Chinnaswamy; Microbial Genetics Laboratory, Department Of Genetics And Plant Breeding, Institute Of Agricultural Sciences, Banaras Hindu University, Varanasi- 221005, India; Cappunu@yahoo.com, SEN, D.; Microbial Genetics Laboratory, Department Of Genetics And Plant Breeding, Institute Of Agricultural Sciences, Banaras Hindu University, Varanasi- 221005, India, SINGH, M. K.; Microbial Genetics Laboratory, Department Of Genetics And Plant Breeding, Institute Of Agricultural Sciences, Banaras Hindu University, Varanasi- 221005, India, DHAR, B.; Microbial Genetics Laboratory, Department Of Genetics And Plant Breeding, Institute Of Agricultural Sciences, Banaras Hindu University, Varanasi- 221005, India
In this study the symbiotic interactive effect of different Bradyrhizobium japonicum strains with six soybean cultivars were evaluated under fi eld conditions. The rhizobial strains ASR011, USDA123...
Mahata, P, Sen, D, Natarajan, S
Three-dimensional $[Mn_3{C_6H_3(COO)_3}_2]$ comprising two-dimensional -Mn-O-Mn- distorted Kagome layers, formed by two geometrically different hexa-coordinated $Mn^{2+}$ ions, show less frustration...
Mahata, P, Sen, D, Natarajan, S
Three-dimensional $[Mn_3{C_6H_3(COO)_3}_2]$ comprising two-dimensional -Mn-O-Mn- distorted Kagome layers, formed by two geometrically different hexa-coordinated $Mn^{2+}$ ions, show less frustration...
A multi-channel fixed point for a Kondo spin coupled to a junction of Luttinger liquids (2006)
Chandra, Ravi V, Rao, S, Sen, D
We study a system of an impurity spin coupled to a junction of several Tomonaga-Luttinger liquids using a renormalization group scheme. For the decoupled S-matrix at the junction, there is a range of...
A multi-channel fixed point for a Kondo spin coupled to a junction of Luttinger liquids (2006)
Chandra, Ravi V, Rao, S, Sen, D
We study a system of an impurity spin coupled to a junction of several Tomonaga-Luttinger liquids using a renormalization group scheme. For the decoupled S-matrix at the junction, there is a range of...
Field theoretic studies of quantum spin systems in one dimension (2005)
We describe some field theoretic methods for studying quantum spin systems in one dimension. These include the nonlinear a-model approach which is particularly useful for large values of the spin,...
Spin wave analysis of Heisenberg magnets in restricted geometries (2004)
In the last decade it has been proven that the standard spin wave theory was able to provide accurate zero-temperature results for a number of low-dimensional Heisenberg spin systems. In this chapter...
Issues in geometric synthesis of mechanisms (2004)
The paper presents a systematic non-iterative procedure for a priory design of link shapes for interference-free motion of a planar mechanism. We define the notions of unilayer and multi-layer links...
Tunneling through two resonant levels: Fixed points and conductances (2004)
We study point contact tunneling between two leads of a Tomonaga-Luttinger liquid through two degenerate resonant levels in parallel. This is one of the simplest cases of a quantum junction problem...
We examine the effect of interactions between the electrons on the Landauer-Buttiker conductances of some systems of quantum wires with different geometries. The systems include a long wire with a...
Identification of mass fractal in chemically synthesized ZnS quantum dots (2002)
Vogel,Walter, Dhayagude,D., Chitra,R., Sen,D., Mazumder,S., Kulkarni,Sulabha K.
Zinc sulphide quantum dots chemically capped with thioglycerol having two different sizes have been synthesized. The particles have a disordered sphalerite structure and are slightly contracted by 1%...
Conductance through contact barriers of a finite-length quantum wire (2002)
We use the technique of bosonization to understand a variety of recent experimental results on the conductivity of a quantum wire. The quantum wire is taken to be a finite-length Luttinger liquid...
Field theoretical study of a spin-1/2 ladder with unequal chain exchanges (2002)
We study the low-energy properties of a Heisenberg spin-1/2 zigzag ladder with different exchange constants on the two chains. Using a nonlinear sigma-model field theory and Abelian bosonization, we...
Identification of mass fractal in chemically synthesized ZnS quantum dots (2002)
Vogel, Walter, Dhayagude, D., Chitra, R., Sen, D., Mazumder, S., Kulkarni, Sulabha K.
Zinc sulphide quantum dots chemically capped with thioglycerol having two different sizes have been synthesized. The particles have a disordered sphalerite structure and are slightly contracted by 1%...
Sen, D., Wolfson, H., Dilworth, M.
The toxic effects of lead have been known for centuries. Occupational exposure to this chemical hazard has also been well documented in relation to various industry groups, including construction,...
Identification of mass fractal in chemically synthesized ZnS quantum dots (2001)
Vogel,Walter, Dhayagude,D., Chitra,R., Sen,D., Mazumada,S., Urban,Joachim, ...
Identification of mass fractal in chemically synthesized ZnS quantum dots (2001)
Vogel, Walter, Dhayagude, D., Chitra, R., Sen, D., Mazumada, S., Urban, Joachim, ...
Toxic Effects of Fish-seed (Anamirta cocculus) on Carp (Cyprinus carpio) Duman, E., Dorucu (2001)
In this study, toxic effects of fish-seed (Anamirta cocculus) on carp (Cyprinus carpio) was investigated. Powdered fish-seed was applied at concentrations of 1, 2, 3, 4, 5, 7.5, 10, 15, 20, 30, 40,...
Sen, D., McElvenny, D., Thomas, R.
Contact dermatitis is common in the chemical industry. A cross‐sectional study was conducted to investigate the prevalence of self‐reported skin problems in employees involved in the...
Jacob, J, Kumar, A, Asokan, S, Sen, D, Chitra, R, Mazumder, S
The work reported hen was motivated by a desire to verify the existence of structure - specifically MP-rich clusters induced by sodium bromide (NaBr) in the ternary liquid mixture 3-methylpyridine...
Selvam, A. M., Sen, D., Mody, S. M. S.
The circadian rhythm in the occurrence of acute myocardial infarction (AMI) was assessed in three hundred and twenty three patients admitted with AMI during the two-year period June 1992 to May 1994....
Magnetic and Microstructural Properties of YBa2Cu3O7-x-Ag Composite. (1998)
Sen, D., Bhattacharya, D., Ghatak, S. K., Chopra, K. L.
This paper concerned mmc in some important way and contained information about, utilized, or discussed these subjects: basic topics:, composite materials, mmc materials and material types:, ag...
Self-Organized Criticality in Daily Incidence of Acute Myocardial Infarction (1998)
Selvam, A. M., Sen, D., Mody, S. M. S.
Continuous periodogram power spectral analysis of daily incidence of acute myocardial infarction (AMI) reported at a leading hospital for cardiology in Pune, India for the two-year period June 1992...
Field theories for frustrated antiferromagnetic spin chains (1997)
We study the antiferromagnetic spin chain with both dimerization and frustration. The classical ground state has three phases, a Neel phase, a spiral phase and a collinear phase, which we study...
Phase diagram of the spin-one Heisenberg system with dimerization and frustration (1996)
Pati, S, Chitra, R, Sen, D, Krishnamurthy, HR, Ramasesha, S
We use the density matrix renormalization group method to study the groundstate "phase" diagram and some low-energy properties of an antiferromagnetic spin-1 chain with a next-nearest-neighbour...
Phase diagram of the spin-one Heisenberg system with dimerization and frustration (1996)
Pati, S, Chitra, R, Sen, D, Krishnamurthy, HR, Ramasesha, S
We use the density matrix renormalization group method to study the groundstate "phase" diagram and some low-energy properties of an antiferromagnetic spin-1 chain with a next-nearest-neighbour...
DMRG Studies of the Spin-Half Heisenberg System with Dimerization and Frustration (1994)
Chitra, R., Pati, Swapan K., Krishnamurthy, H. R., Sen, D., Ramasesha, S.
Using the density matrix renormalization group technique, we study the ground state phase diagram and other low-energy properties of an isotropic antiferromagnetic spin-half chain with both...
Critical quantum spin chains as conformal field theories (1992)
The author presents a series of one-dimensional quantum Hamiltonians which, at their critical points, realise the minimal unitary series of conformal field theories with central charge less than 1....
Critical quantum spin chains as conformal field theories (1992)
The author presents a series of one-dimensional quantum Hamiltonians which, at their critical points, realise the minimal unitary series of conformal field theories with central charge less than 1....
Large-S analysis of one-dimensional quantum-spin models in a transverse magnetic field (1990)
We analyze the zero-temperature phase diagram of two kinds of one-dimensional quantum-spin models in a transverse magnetic field. The first kind has uniform nearest-neighbor ferromagnetic and...
Large-S analysis of one-dimensional quantum-spin models in a transverse magnetic field (1990)
We analyze the zero-temperature phase diagram of two kinds of one-dimensional quantum-spin models in a transverse magnetic field. The first kind has uniform nearest-neighbor ferromagnetic and...
Relative efficacy of trimethoprim-sulfamethoxazole and nalidixic acid for acute invasive diarrhea.
Bhattacharya, S K, Datta, P, Datta, D, Bhattacharya, M K, Sen, D, Saha, M R, ...
Ramamurthy, T, Bhattacharya, S K, Uesaka, Y, Horigome, K, Paul, M, Sen, D, ...
A highly sensitive bead enzyme-linked immunosorbent assay (bead ELISA) for detection of cholera toxin (CT) was evaluated for direct detection of CT from stool specimens of patients with acute...
Ghosh, A R, Sen, D, Sack, D A, Hoque, A T
Strains of enterotoxigenic Escherichia coli producing either colonization factor antigen (CFA) I or II were tested for expression of CFA when grown on 16 different agar media by using agglutination...
Three simple immunological tests, the modified Elek (Biken) test, the modified staphylococcal coagglutination test, and the rapid GM1-horseradish peroxidase-enzyme-linked immunosorbent assay have...
General practices and health and safety at work.
There is a lack of knowledge and understanding of health and safety legislation in general practice surgeries. As a result, compliance with such laws is also seriously lacking. However, both...
Relative efficacy of trimethoprim-sulfamethoxazole and nalidixic acid for acute invasive diarrhea.
Bhattacharya, S K, Datta, P, Datta, D, Bhattacharya, M K, Sen, D, Saha, M R, ...
Ramamurthy, T, Bhattacharya, S K, Uesaka, Y, Horigome, K, Paul, M, Sen, D, ...
A highly sensitive bead enzyme-linked immunosorbent assay (bead ELISA) for detection of cholera toxin (CT) was evaluated for direct detection of CT from stool specimens of patients with acute...
Ghosh, A R, Sen, D, Sack, D A, Hoque, A T
Strains of enterotoxigenic Escherichia coli producing either colonization factor antigen (CFA) I or II were tested for expression of CFA when grown on 16 different agar media by using agglutination...
Three simple immunological tests, the modified Elek (Biken) test, the modified staphylococcal coagglutination test, and the rapid GM1-horseradish peroxidase-enzyme-linked immunosorbent assay have...
General practices and health and safety at work.
There is a lack of knowledge and understanding of health and safety legislation in general practice surgeries. As a result, compliance with such laws is also seriously lacking. However, both...
Murine memory B cells are multi-isotype expressors.
Wu, C J, Karttunen, J T, Chin, D H, Sen, D, Gilbert, W
Flow cytometric analyses of the surface immunoglobulins of murine memory B cells revealed the existence of populations expressing multiple isotypes, including an IgM+/IgG+ population that could be...
Prospective hospital based study on persistent diarrhoea.
Dutta, P, Lahiri, M, Sen, D, Pal, S C
A total of 383 children aged less than 5 years suffering from acute watery diarrhoea or dysentery were studied in hospital to determine the rate of persistent diarrhoea. Altogether 335 (87.5%)...
Hawthorne, G., Robson, S., Ryall, E. A., Sen, D., Roberts, S. H., Ward Platt, M. P.
OBJECTIVE: To determine whether the St Vincent declaration (1989) target of diabetic pregnancy outcome approximating non-diabetic pregnancy outcome in near to being achieved. DESIGN: Prospective...
Sen Gupta, P. G., Sircar, B. K., Mondal, S., De, S. P., Sen, D., Sikder, S. N., ...
Doxycycline was used among the family contacts of hospitalized cholera patients in Calcutta to determine its effectiveness in controlling transmission of V. cholerae infection. A total of 137 such...
A controlled field trial of an aluminium phosphate-adsorbed cholera vaccine in Calcutta*
Pal, S. C., Deb, B. C., Gupta, P. G. Sen, De, S. P., Sircar, B. K., Sen, D., ...
A controlled field trial to determine the efficacy of a single dose of an aluminium phosphate-adsorbed cholera vaccine was conducted in Calcutta during 1975-77. An aluminium phosphate-adsorbed...