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Search Results: 1 - 10 of 1508 matches for " Anwesha Chatterjee "
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Span of Attention across Stages of Intellectual Impairment: Does Affective Stimulation Matter?  [PDF]
Anwesha Chakrabarti, Mallika Banerjee
Psychology (PSYCH) , 2013, DOI: 10.4236/psych.2013.44058
Abstract:

The present study explores how affectivity and abstraction value influences the span of attention of normal and retarded population. Five intellectual functioning groups were chosen, six in each (N = 30), from both sexes, age of 11 - 23 (mean age 17.36) years from the urban hospitals and educational institutions. For standardization of stimulus materials and controlling of extraneous variables three preliminary experiments were done. A repeated measure experimental design was followed in the main study. Result shows attention span tends to decrease with an increment in abstraction level in the lower range of intellectual ladder. Affective loading in stimulus materials does not enhance the span of attention, per se it inhibits cognition. The result was interpreted in the light of behavioural observation during the experimental conditions as well as the obtained statistical output. Overall analysis revealed that the persons with moderate retardation scored better in attention span in comparison to mild retarded group where average group scored highest. So, the result of span of attention did not follow the ladder of intellectual impairment. The causal attribution on result was interpreted in terms of environmental distraction and the lack of basic cognitive need of the moderately retarded persons which inversely facilitated better attention span as their attention span remains unaffected by distraction. The result is helpful to design the learning materials for the specific intellectual group.

A RETROSPECTIVE STUDY ON COEXISTENCE OF PULMONARY HYDATID CYST AND ASPERGILLOSIS
Anwesha Chatterjee, Goswami H.M., Dhotre S.V. Raval A.A.,Dharsandia M.V., Vegad M.M.
International Journal of Microbiology Research , 2000,
Abstract: Hydatid disease is a rare zoonotic disease. Rarely the hydatid cyst can become infected with mycotic organisms, such as Aspergillus. We describe a young male who presents with clinical features of suppurative lung abscess whose workup diagnosed hydatid cyst complicated by Aspergillus co-infection.A 32-year-old male farm labourer hospitalized with complaints of fever, chills, and productive cough with chest pain since four months duration Significant findings included leukocytosis with eosinophilia. Chestx-ray showing cystic lesion with air fluid level in Left lung suggestive of Hydatid cyst. CECT imaging of thorax and abdomen showed encysted left hydro pneumothoraxwith hypo dense cystic lesion in right lobe of liver,suggesting possibility of hydatid. The patient underwent decortication of the pulmonary cyst. Histopathologicalexamination of surgical specimen revealed cyst of 10 cm in its largest diameter showing cyst wall with thin branching septate hyphae with spores along with pink laminated wall like structure suggestive of hydatid cyst with aspergilloma. Aspergillosis and Hydatid cyst coexistance should be considered in presence of pulmonary cavitary lesion particularly in endemic areas. Detection of such association is important for planning adequate management.
Symmetric Key based Audio Steganography for Mobile Network
Anwesha Mukherjee,Debashis De
International Journal of Engineering Innovations and Research , 2012,
Abstract: This paper presents an innovative Symmetric Key based Audio Steganography algorithms for providing security in mobile network. In this paper the data to be transmitted is encrypted using proposed symmetric key cryptography algorithm. The encrypted text is hidden within an audio file during transmission. Fibonacci series based bit replacement technique is used for the purpose of hiding the data. The audio and the data file are converted into stream of bits. Encryption is performed to convert the plain text to cipher text using the proposed symmetric algorithm using 128-bit key. The bits of the cipher text to be replaced are selected based on Fibonacci series. The time complexity of the proposed algorithm is 75 0less than the previous approach
Comparison of Amino Acid Sequences of Halloween Genes in Spodoptera litura and Spodoptera littoralis  [PDF]
Susmita Chatterjee
Agricultural Sciences (AS) , 2015, DOI: 10.4236/as.2015.65054
Abstract:

20-Hydroxyecdyone (20E), an active form of ecdysteroid, is the key hormone in insect growth and development. To date five P450 enzymes involved in the last four steps of ecdysteroid biosynthesis from ketodiol to 20E namely Spook (Spo), Phantom (Phm), Disembodied (Dib), Shadow (Sad) and Shade (Shd) related to ecdysteroid biosynthesis, are identified and the character of last four enzymes is well studied in Drosophila melanogaster, Bombyx mori and Manduca sexta. All of these genes are called Halloween genes. In this study, we extended these works to a major pest insect in agriculture in India, the cotton leafworm Spodoptera litura (Lepidoptera: Noctuidae). We identified the sequence of five Halloween genes partially and converted into amino acid sequences and then three of them were compared with a very near African species of Spodoptera, Spodoptera littoralis. The results suggest amino acid substitution in open reading frame of phantom, shade and disembodied protein in Spodoptera litura.

Hierarchical Analysis of Variation in the Mitochondrial 16SrRNA Gene among Five Different Insect Orders  [PDF]
Chatterjee Susmita
Agricultural Sciences (AS) , 2015, DOI: 10.4236/as.2015.611132
Abstract: Nucleotide sequences from a 500 bp region of the 16SrRNA gene were analyzed for ten insect pests of five different orders to examine the patterns of variation within the gene fragment and the taxonomic levels for which it showed maximum utility in phylogeny estimation. A hierarchical approach was adopted in the study through comparison of levels of sequence variation among taxa at different taxonomic levels. Among them, partial 16SrRNA gene was amplified in ten insects of five different orders. As previously reported for many holometabolous insects, the 16SrRNA gene data is reported here for 5 different orders were highly AT-rich and exhibited strong site-to-site variation in substitution rate. The partial 16SrRNA genes of five out of ten insects were reported first time. Primers were made from blasting 2 different genera of the order Diptera. These primers were proven to be universal as it amplified the partial 16SrRNA gene in ten different insects across five different orders, Diptera, Coleoptera, Heteroptera, Lepidoptera and Hymenoptera. Later, a phylogenetic tree was also constructed for understanding and analyzing the relation of above five orders. This study resulted in unusual findings which were as follows: All the species of Drosophila of order Diptera were evolutionary more closely related to Dysdercus koenigii of order Heteroptera than Bactrocera cucurbitae of Drosophilan order, Diptera in terms of partial 16SrRNA gene sequence. Similarly, Spodoptera litura and Helicoverpa armigera belonged to same family Noctuidae whereas Pieris brassicae belonged to family Pieridae. All belonged to order Lepidoptera. The results showed that Spodoptera litura in terms of partial 16SrRNA gene sequence was evolutionary more close to Pieris brassicae than Helicoverpa armigera.
Assessment of arbuscular mycorrhizal fungi on the phytoremediation potential of Ipomoea aquatica on cadmium uptake
Anwesha M. Bhaduri,M. H. Fulekar
3 Biotech , 2012, DOI: 10.1007/s13205-012-0046-8
Abstract: The phytoremedial potential of Ipomoea aquatica and role of arbuscular mycorrhizal fungi (AMF) during Cadmium uptake was studied under two different soils i.e., soil inoculated with and without AMF. The plants were treated with different concentrations of Cd(NO)3 starting from 0, 5, 10, 25, 50, and 100 ppm in three replicate design in soil with and without AMF inoculation. Results showed that AMF enhanced accumulation of cadmium in plant tissues at all concentrations. Plants in AMF exhibited tolerance for Cd up to 100 mg/l and accumulated 88.07% in its tissues with no visual symptoms of toxicity, whereas those in non-AMF showed marked growth reduction at the same concentration with a metal accumulation of 73.2%. A significant variation of antioxidant enzymes under different environments evaluated the defense pathways of plants during uptake of Cd. Physiological changes and nutrient uptake showed that plants inoculated in AMF were more unwavering during stress conditions. The study established that phytoremedial potential of I. aquatica depends on rhizospheric conditions which enhanced Cd uptake. Finally, it was established that AMF was able to maintain an efficient symbiosis with I. aquatica in soil moderately contaminated by Cd, viable due to relation between fungus and plant.
SOLUTION OF TRAVELING SALESMAN PROBLEM ON SCX BASED SELECTION WITH PERFORMANCE ANALYSIS USING GENETIC ALGORITHM
SOURAV SAMANTA,ANWESHA DE,SATRUGHNA SINGHA
International Journal of Engineering Science and Technology , 2011,
Abstract: In this paper the implementation and performance of a new unconventional selection operator for Genetic Algorithm have been emphasized. The operator has been tuned specifically to solve the Travelling Salesman Problem. The proposed Selection Operator has been utilized based on Sequential Constructive Crossover. Here the parent’s structure has been chosen as selection criteria of a chromosome to survive for the next generations. Also it is observed that how much the low cost gene sequences of its parent’s structure to optimize the fitness of individuals has been maintained .It has been shown experimentally that the better convergence to optimal andnear optimal solution compared to the traditional TSP with Conventional genetic operators has been achieved.
Parallel Simulation of Population Balance Model-Based Particulate Processes Using Multicore CPUs and GPUs
Anuj V. Prakash,Anwesha Chaudhury,Rohit Ramachandran
Modelling and Simulation in Engineering , 2013, DOI: 10.1155/2013/475478
Abstract:
Parallel Simulation of Population Balance Model-Based Particulate Processes Using Multicore CPUs and GPUs
Anuj V. Prakash,Anwesha Chaudhury,Rohit Ramachandran
Modelling and Simulation in Engineering , 2013, DOI: 10.1155/2013/475478
Abstract: Computer-aided modeling and simulation are a crucial step in developing, integrating, and optimizing unit operations and subsequently the entire processes in the chemical/pharmaceutical industry. This study details two methods of reducing the computational time to solve complex process models, namely, the population balance model which given the source terms can be very computationally intensive. Population balance models are also widely used to describe the time evolutions and distributions of many particulate processes, and its efficient and quick simulation would be very beneficial. The first method illustrates utilization of MATLAB's Parallel Computing Toolbox (PCT) and the second method makes use of another toolbox, JACKET, to speed up computations on the CPU and GPU, respectively. Results indicate significant reduction in computational time for the same accuracy using multicore CPUs. Many-core platforms such as GPUs are also promising towards computational time reduction for larger problems despite the limitations of lower clock speed and device memory. This lends credence to the use of highfidelity models (in place of reduced order models) for control and optimization of particulate processes. 1. Introduction Modeling and simulation are powerful tools universally employed in designing, analyzing, and controlling particulate processes. These particulate processes such as crystallization, granulation, milling, and polymerization are some of the major unit operations carried out in the manufacture of bulk commercial products like pharmaceuticals, detergents, fertilizers, and polymers. Research work focusing on the modeling and simulation of these particulate processes, specifically those involving granular materials, has been growing at a steady pace over the last few decades [1–3]. This is a significant achievement in itself, considering the fact that these systems are inherently dynamic in behavior and are driven by complex microscale phenomena [4]. Although the underlying mechanisms of such processes are yet to be thoroughly grasped, granulation, a particle design process, is one such area where substantial progress has been made over the years [5]. The approaches for modeling such systems are as numerous as they are varied: Discrete Element Modeling (DEM) [6], Population Balance Modeling (PBM) [3, 7–13], hybrid models by combining PBM with DEM [14], PBM with Volume of Fluid (VoF) methods [15], and PBM with Computational Fluid Dynamics (CFD) [16], to name a few. Of the aforementioned, the most widely used are the DEM and PBM methods. Population
A Finite Element Study of Elastic-Plastic Hemispherical Contact Behavior against a Rigid Flat under Varying Modulus of Elasticity and Sphere Radius  [PDF]
Prasanta Sahoo, Biplab Chatterjee
Engineering (ENG) , 2010, DOI: 10.4236/eng.2010.24030
Abstract: The present study considers a finite element analysis of elastic-plastic axi-symmetric hemispherical contact for a frictionless deformable sphere pressed by a rigid flat. The material of the sphere is modeled as elastic perfectly plastic. Analysis is carried out to study the effect of varying modulus of elasticity and sphere radius in wide range of dimensionless interference until the inception of plasticity as well as in plastic range. Results are compared with previous elastic-plastic models. It is found that materials with Young’s modulus to yield strength (E/Y) ratio less than and greater than 300 show strikingly different contact phenomena. The dependency of E on dimensionless interference at which the plastic region fully covers the surface is observed. However with different radius, finite element study exhibits similar elastic-plastic phenomena.
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