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Search Results: 1 - 10 of 965 matches for " Hazra Imran "
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A Framework for Efficient Document Ranking Using Order and Non Order Based Fitness Function
Hazra Imran,Aditi Sharan
Lecture Notes in Engineering and Computer Science , 2010,
Hazra Imran,Aditi Sharan
International Journal of Computer Science & Information Technology , 2009,
Abstract: The explosive growth of the World Wide Web is making it difficult for a user to locate information that isrelevant to his/her interest. Though existing search engines work well to a certain extent but they still faceproblems like word mismatch which arises because the majority of information retrieval systemscompare query and document terms on lexical level rather than on semantic level and short query: theaverage length of queries by the user is less than two words. Short queries and the incompatibilitybetween the terms in user queries and documents strongly affect the retrieval of relevant document.Query expansion has long been suggested as a technique to increase the effectiveness of the informationretrieval. Query expansion is the process of supplementing additional terms or phrases to the originalquery to improve the retrieval performance. The central problem of query expansion is the selection ofthe expansion terms based on which user’s original query is expanded. Thesaurus helps to solve thisproblem. Thesaurus have frequently been incorporated in information retrieval system for identifying thesynonymous expressions and linguistic entities that are semantically similar. Thesaurus has been widelyused in many applications, including information retrieval and natural language processing.
Selecting Effective Expansion Terms for Better Information Retrieval
Hazra Imran,Aditi Sharan
International Journal of Computer Science & Applications , 2010,
Spontaneous Resolution of Cataract and Medical Management of Corneal Opacity in an Indian Parrot—Psittacula krameri manillensis  [PDF]
Sarbani Hazra
Open Journal of Veterinary Medicine (OJVM) , 2013, DOI: 10.4236/ojvm.2013.32028

A 35-year-old Indian parrot (Psittacula krameri manillensis) was presented to the Department of Veterinary Surgery & Radiology, West Bengal University of Animal and Fishery Sciences with a history of blepharospasm and corneal lesion OS. Test with fluorescein dye was negative. The dense corneal opacity (macula) was identified as involving the posterior corneal layer. The further ophthalmic examination was done and hypermature phacolytic cataract was diagnosed. No other abnormality was detected. Medical management with topical nepafenac prednisolone and triple antibiotic was instituted. The corneal lesion subsided completely within one week followed by spontaneous resorption of the cataract. The treatment protocol was successfully eliminated the discomfort and intraocular lesions in the senile parrot.

Multigrid One-Shot Method for PDE-Constrained Optimization Problems  [PDF]
Subhendu Bikash Hazra
Applied Mathematics (AM) , 2012, DOI: 10.4236/am.2012.330216
Abstract: This paper presents a numerical method for PDE-constrained optimization problems. These problems arise in many fields of science and engineering including those dealing with real applications. The physical problem is modeled by partial differential equations (PDEs) and involve optimization of some quantity. The PDEs are in most cases nonlinear and solved using numerical methods. Since such numerical solutions are being used routinely, the recent trend has been to develop numerical methods and algorithms so that the optimization problems can be solved numerically as well using the same PDE-solver. We present here one such numerical method which is based on simultaneous pseudo-time stepping. The efficiency of the method is increased with the help of a multigrid strategy. Application example is included for an aerodynamic shape optimization problem.
A Time-varying Parameter Based Seasonally-adjusted Bayesian State-space Model for Forecasting
Arnab Hazra
Statistics , 2015,
Abstract: In this paper, we develop a time-varying parameter based seasonally-adjusted Bayesian state-space model for non-stationary time series datasets where both the trend and seasonal components are present and it is the general scenario for most of the real datasets in various scientific disciplines. In spite of removing such terms using some do-and-check procedure to make the data stationary, our model directly fits a dataset and forecasts a number of future observations. For a specific prior construction we have considered, every parameter update is one-dimensional so that we don't need to invert any matrix and also we overcome the difficulty of Metropolis-Hastings steps simply by Gibbs sampling which is another advantage of this model. It can handle missing data as well which occurs very often in time series contexts. We implement it on the sufficiently large (24 years of monthly average temperature series, i.e. the number of observations =288) for 57 meteorological stations across India and show that for most of the cases, our method forecasts quite accurately for the months of the 25-th year.
On the Effects of Complex Conjugate Medium on TM Scattering by a Strip  [PDF]
Amjad Imran, Ahsan Illahi
Journal of Electromagnetic Analysis and Applications (JEMAA) , 2011, DOI: 10.4236/jemaa.2011.37043
Abstract: In this paper, Method of Kobayashi Potential is used to determine the scattering behavior of a strip which is placed at the air-complex conjugate medium interface. And discussion is presented that how the complex conjugate medium mod-ify the scattering properties of the strip. A comparison is also given with that if we replace the conjugate medium with standard dielectric medium. E-polarized electromagnetic plane wave is supposed to be obliquely incident upon the ge-ometry. Scattered fields in both the half spaces are supposed in terms of unknown weighting functions. Discontinuous properties of Weber-Schafheitlin integral and orthogonal properties of Jacobi’s polynomials are used to determine these unknown weighting functions. Far scattered fields have been calculated using Saddle Point Method and computed for different parameters of interest.
Structural and Electrical Characterization of Sintered Silicon Nitride Ceramic  [PDF]
Imran Khan, M. Zulfequar
Materials Sciences and Applications (MSA) , 2011, DOI: 10.4236/msa.2011.27102
Abstract: The electrical conduction phenomena, dielectric response and microstructure have been discussed in sintered silicon nitride ceramics at different temperature and frequencies. Microstructure and phase of the sintered samples was investigated by Scanning Electron Microscope (SEM) and X-ray diffractometer (XRD). The electrical conductivity, dielectric constant and dielectric loss increases exponentially with temperature greater than 600 K. The dielectric constant and loss have been measured in the frequency range 100 Hz to 1 MHz. The a.c. conduction studies in the audio frequency range 500 Hz to 1 MHz indicates that the conduction may be due to the electronic hopping mechanism. Silicon Nitride ceramics became dense after sintering. The effect of grain size and role of phase on electrical and dielectric properties have been discussed. These types of samples can be used as a high temperature semi conducting materials for device packaging.
Spatio-Temporal Land Cover Dynamics in Open Cast Coal Mine Area of Singrauli, M.P., India  [PDF]
Imran Khan, Akram Javed
Journal of Geographic Information System (JGIS) , 2012, DOI: 10.4236/jgis.2012.46057
Abstract: Singrauli is an opencast coal mining area where large scale mining activities are going on continuously, land use/land cover studies are of vital importance to observe the changes in the land use/land cover. The present study utilizes multi-spectral/multi-temporal data of Indian Remote Sensing Satellite (IRS) LISS II geocoded (FCC) of 4th May 1993 and LISS III of 4th May 2010 for thematic mapping. Survey of India toposheet 63L/12 on scale 1:50,000 were used for preparation of base map which was overlaid on the FCC for land use/land cover mapping through visual interpretation. Visual interpretation of satellite imagery led to the identification of 15 land use/land cover categories such as dense forest, open forest, open scrub, plantation, cultivated land, uncultivated land, mining pit, overburden dumps, wasteland and settlement. The ground truth verification was carried out in key areas to rectify the errors in generated maps and then land use/land cover maps were finalized. The comparative analysis of land use/land cover shows that dense forest has been degraded to open forest, open scrubs and mining pits due to the expansion of mining activity. Open scrubs has increased, overburden dumps has increased, settlement has also increased, cultivated land has decreased and changed into uncultivated land and wasteland. It has also been observed that the plantation has been done on overburden dumps and residential colonies of NCL and NTPC. It has been identified that the main drivers which has increased the rate of change in land use/land cover are mainly coal mining activities and industrial expansion.
A Trustworthy and well-organized data disseminating scheme for ad-hoc wsns
Nomica Imran,Imran Rao
International Journal of Computer Networks & Communications , 2010,
Abstract: Wireless Sensor Networks (WSNs) generate massive amount of live data and events sensed throughdispersedly deployed tiny sensors. This generated data needed to be disseminate to the sink with slightconsumption of network resources. One of the ways to efficiently transmit this bulk data is gossiping. Animportant consideration in gossip-based dissemination protocols is to keep routing table up to date.Considering the inherent resource constrained nature of adhoc wireless sensor networks, we propose agossip based protocol that consumes little resources. Our proposed scheme aims to keep the routing tablesize R as low as possible yet it ensures that the diameter is small too. We learned the performance of ourproposed protocol through simulations. Results show that our proposed protocol attains majorimprovement in network reachability and connectivity.
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