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Search Results: 1 - 10 of 1267 matches for " Partha;Bandyopadhyay "
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About science communication in India
Bandyopadhyay Partha
JCOM : Journal of Science Communication , 2005,
Leaching behaviour of pendimethalin causes toxicity towards different cultivars of Brassica juncea and Brassica campestris in sandy loam soil
Subhendu Bandyopadhyay, Partha P. Choudhury
Interdisciplinary Toxicology , 2009, DOI: 10.2478/v10102-009-0025-z
Abstract: An experiment was conducted at the farm of Zonal Adaptive Research Station, Uttar Banga Krishi Viswavidhyalaya, Pundibari, Cooch Behar, West Bengal to evaluate the effect of pendimethalin on the yield, weed density and phytotoxicity in different varieties of rai (Brassica juncea) and yellow sarson (B. campestris var. yellow sarson) under higher soil moisture regime in Terai region of West Bengal. Pre-emergence application of pendimethalin at higher dose i.e. 1.0 kg/ha recorded higher plant mortality (30.92%) due to the presence of higher concentration of pendimethalin residue (0.292 μg/g) till the tenth day of crop age and consequently had the reduced yield (12.59 q/ha) than the dose of 0.7 kg/ha (13.33 q/ha) where plant mortality was only 12.62% due to comparatively lower level of pendimethalin residue (0.192 μg/g). Although the application of pendimethalin at the rate of 1.0 kg/ha was able to control weed more efficiently (18.96/m2) than the dose of 0.7 kg/ha (30.41/m2) and subsequent lower doses. The herbicide leached down to the root zone resulting in phytotoxicity towards crop. Yellow sarson group (Brassica campestris) showed more susceptibility than rai (Brassica juncea) group against pendimethalin application at higher doses.
Textual Entailment Using Lexical And Syntactic Similarity
Partha Pakray,Sivaji Bandyopadhyay,Alexander Gelbukh
International Journal of Artificial Intelligence & Applications , 2011,
Abstract: A two-way Textual Entailment (TE) recognition system that uses lexical and syntactic features has been described in this paper. The TE system is rule based that uses lexical and syntactic similarities. The important lexical similarity features that are used in the present system are: WordNet based uni-gram match, bi-gram match, longest common sub-sequence, skip-gram, stemming. In the syntactic TE system, the important features used are: subject-subject comparison, subject-verb comparison, object-verb comparison and cross subject-verb comparison. The system has been separately trained on each development corpus released as part of the Recognising Textual Entailment (RTE) competitions RTE-1, RTE-2, RTE-3 and RTE-5 and tested on the respective RTE test sets. No separate development data was released in RTE-4. The evaluation results on each test set are compared with the RTE systems that participated in the respective RTE competitions with lexical and syntactic approaches.
Semantic Textual Entailment Recognition using UNL
Pakray, Partha;Poria, Soujanya;Bandyopadhyay, Sivaji;Gelbukh, Alexander;
Polibits , 2011,
Abstract: a two-way textual entailment (te) recognition system that uses semantic features has been described in this paper. we have used the universal networking language (unl) to identify the semantic features. unl has all the components of a natural language. the development of a unl based textual entailment system that compares the unl relations in both the text and the hypothesis has been reported. the semantic te system has been developed using the rte-3 test annotated set as a development set (includes 800 text-hypothesis pairs). evaluation scores obtained on the rte-4 test set (includes 1000 text-hypothesis pairs) show 55.89% precision and 65.40% recall for yes decisions and 66.50% precision and 55.20% recall for no decisions and overall 60.3% precision and 60.3% recall.
Non tuberculous mycobacteria and toxoplasma co-infection of the central nervous system in a patient with AIDS
Sardar, Partha;Bandyopadhyay, Dipanjan;Roy, Deeptarka;Guha, Pradipta;Guha, Goutam;Banerjee, Amit Kumar;
Brazilian Journal of Infectious Diseases , 2009, DOI: 10.1590/S1413-86702009000600011
Abstract: new-onset seizures are frequent manifestations in patients infected with human immunodeficiency virus (hiv). we describe the clinical and radiological findings in an 25yr old aids patient presenting with new onset seizures as the primary manifestation of cerebral toxoplasmosis and non tuberculous mycobacterial [ntm] co-infection. cranial computed tomography showed a subtle ventricular dilatation whereas magnetic resonance imaging disclosed prominent temporal horn. toxoplasma tachyzoites and rapidly growing mycobacteria were recovered from csf. seizures were complex partial in nature and refractory to antiepileptic therapy.
Multiorgan involvement due to cytomegalovirus infection in AIDS
Majumder, Shounak;Mandal, Sanjay K.;Bandyopadhyay, Dipanjan;Chowdhury, Subhasis Roy;Chakraborty, Partha P.;K., Mitra;
Brazilian Journal of Infectious Diseases , 2007, DOI: 10.1590/S1413-86702007000100039
Abstract: cytomegalovirus (cmv) infection is a relatively late complication of aids. like other viruses contributing to co-morbidity of hiv infection, cytomegalovirus has the propensity to cause multiorgan involvement. we report the case of a 34-year-old seropositive man who presented with bilateral lower limb weakness and symptomatic pallor. he was already on antiretroviral drugs for a month prior to presentation. detailed clinical examination and laboratory investigations revealed cytomegalovirus polyradiculoneuropathy associated with bone marrow dysplasia. dysplasia of haematopoeitic cell lines occurs in 30% to 70% of hiv infected patients, and is often indistinguishable from myelodysplastic syndrome. however, in our case, the bone marrow picture reverted back to normal with treatment of the cmv infection, pointing to a possible role of cmv as the causative agent of bone marrow dysplasia. moreover, cmv has been incriminated as a pathogen producing the immune reconstitution inflammatory syndrome. the onset of the disease in our case one month after initiation of haart strongly raises the possibility of this being a case of cmv related iris. this is the first reported case where iris has presented with cmv polyradiculoneuropathy and bone marrow dysplasia. we would like to highlight that in today's era of hiv care, clinicians should be aware of the possibility of multiorgan involvement by cmv, for appropriate management of this disease in the background of aids.
Lifshitz Transition Including Many-Body Effects in Bi-Layer Graphene and Change in Stacking Order  [PDF]
Partha Goswami
Graphene (Graphene) , 2013, DOI: 10.4236/graphene.2013.22013
Abstract: We consider the AB-(Bernal) stacking for the bi-layer graphene (BLG) system and assume that a perpendicular electric field is created by the external gates deposited on the BLG surface. In the basis (A1, B2, A2, B1) for the valleyKand the basis (B2, A1, B1, A2) for the valley K′, we show the occurrence of trigonal warping [1], that is, splitting of the energy bands or the density of states on the kx - ky plane into four pockets comprising of the central part and three legs due to a (skew) interlayer hopping between A1 and B2. The hopping between A1 - B2 leads to a concurrent velocity v3 in addition to the Fermi velocity vF. Our noteworthy outcome is that the above-mentioned topological change, referred to as the Lifshitz transition [2, 3], is entirely bias-tunable. Furthermore, the many-body effects, which is known to yield logarithmic renormalizations [4] in the band dispersions of monolayer graphene, is found to have significant effect on the bias-tunability of this transition. We also consider a variant of the system where the A atoms of the two layers are over each other and the B atoms of the layers are displaced with respect to each other. The Fermi energy density of statesfor zero bias corresponds to the inverted sombrero-like structure. The structure is found to get deformed due to the increase in the bias.
Modified NSGA-II for a Bi-Objective Job Sequencing Problem  [PDF]
Susmita Bandyopadhyay
Intelligent Information Management (IIM) , 2012, DOI: 10.4236/iim.2012.46036
Abstract: This paper proposes a better modified version of a well-known Multi-Objective Evolutionary Algorithm (MOEA) known as Non-dominated Sorting Genetic Algorithm-II (NSGA-II). The proposed algorithm contains a new mutation algorithm and has been applied on a bi-objective job sequencing problem. The objectives are the minimization of total weighted tardiness and the minimization of the deterioration cost. The results of the proposed algorithm have been compared with those of original NSGA-II. The comparison of the results shows that the modified NSGA-II performs better than the original NSGA-II.
Identification of Forerunners and Transmission of Energy to Tsunami Waves Generated by Instanteneous Ground Motion on a Non-Uniformly Sloping Beach  [PDF]
Arghya Bandyopadhyay
International Journal of Geosciences (IJG) , 2013, DOI: 10.4236/ijg.2013.42042

The problem of generation and propagation of tsunami waves is mainly focused on plane beach, there are very few analytical works where wave generation is considered on non-uniformly sloping beach and as a result those works might have failed to capture important facts which are influenced by bottom-slope of the beach. Some researchers provided solution to the forced long linear waves but on a beach with uniform slope while the importance of including variable bottom topography is mentioned by few researchers but they also stayed away from considering continuous variability of the ocean bed as they were studying runup problem. This paper analyzes tsunami waves which are generated by instantaneous bottom dislocation on a ocean floor with variable slope of the form y=-qxr, q > 0, r > 0. Attempts are made to find analytical solution of the problem and along the way tsunami forerunners are identified while investigating the short time wave behavior, not found even with constant slope beaches. In our study a rather significant phenomenon with regard to energy transmission to the waves at steady-state are observed with some notable features.

Orbital Epithelial Implantation Cyst Presenting 40 Years after Orbital Trauma  [PDF]
Saruban Pasu, Partha Chakraborty
Open Journal of Ophthalmology (OJOph) , 2013, DOI: 10.4236/ojoph.2013.32007

Here we present an unusual case of an epithelial implantation cyst within the orbit which presented 40 years after initial injury from an airgun pellet. A retrospective review of the case was performed. This case highlights the importance of taking a thorough history when assessing adnexal lesions of undetermined origin.

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