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Search Results: 1 - 10 of 2103 matches for " Brijesh Verma "
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Binary Validation as Segmentation for Cursive Handwriting Recognition
Hong Lee,Brijesh Verma
Asian Journal of Information Technology , 2012, DOI: 10.3923/ajit.2011.180.191
Abstract: A novel Binary Validation as Segmentation (BVS) is presented in this study. BVS is a bottom-up approach for character segmentation in off-line cursive handwriting recognition. The character segmentation is a process to extract individual character image from a handwritten word image. The extensive literature reveals that offline handwriting recognition still suffers from the absence of reliable character segmentation algorithms. The character segmentation stage is very crucial part in offline handwriting recognition because the recognition performance is directly affected by the segmentation performance. Therefore, improving the segmentation accuracy is very high prior task in this field. BVS takes over segmentation components to generate primitives. The over segmentation guarantees that none of primitives contains image pixels belonging to different characters. Based on the primitives, neighboring primitives are combined to create evaluation hypotheses. The most competent hypothesis is sought by global competency function using neural network classifier. BVS repeats cycles of combination and evaluation iteratively. Each cycle combines one a pair of two neighboring primitives permanently. That s why the proposed approach includes the term, binary. BVS also introduces Continuous Foreground Transition (CFT) model to prevent under-segmentation errors. The proposed approach has been evaluated on CEDAR benchmark database. The results showed a significant improvement in segmentation errors. The analysis of results showed that the inclusion of CFT into the validation function has played a major role in improving over segmentation and bad-segmentation errors.
Plaquette-triplon analysis of a trimerized spin-1 Kagomé Heisenberg antiferromagnet
Pratyay Ghosh,Akhilesh Kumar Verma,Brijesh Kumar
Physics , 2015,
Abstract: A quantum spin-1 Heisenberg model on trimerized Kagom\'e lattice is studied by doing a low-energy bosonic theory in terms of plaquette-triplons defined on the triangular unit-cells. The model considered has an intra-triangle antiferromagnetic interaction, $J$ (set to 1), and two inter-triangle couplings, $J^\prime>0$ (nearest-neighbor) and $J^{\prime\prime}$ (next-nearest-neighbor; of both signs). The triplon analysis performed on this model investigates the stability of the trimerized singlet ground state in the $J^\prime$-$J^{\prime\prime}$ plane. It gives a quantum phase diagram that has two gapless antiferromagnetically ordered phases separated by the spin-gapped trimerized singlet phase. The trimerized singlet ground state is found to be stable on $J^{\prime\prime}=0$ line, and also on both sides of it for $J^{\prime\prime}\neq 0$, in an extended region bounded by the critical lines of transition to gapless antiferromagnetic phases. The gapless phase for negative $J^{\prime\prime}$ has a coplanar $120^\circ$-antiferromagnetic order with $\sqrt{3}\times\sqrt{3}$ structure. In this phase, all the local magnetic moments are of equal length, and the angle between any two of them on a triangle is exactly $120^\circ$. The other gapless phase, for positive $J^{\prime\prime}$, is found to exhibit a different coplanar antiferromagnetic order with ordering wave vector ${\bf q}=(0,0)$. Here, two magnetic moments in a triangle are of same magnitude but shorter than the third, and the angle between a short and the long moments is $120^\circ+\delta$. However, when $J^{\prime\prime}=J^\prime$, their magnitudes become equal and the relative-angles $120^\circ$.
AN ANN BASED APPROACH FOR OPTIMAL PLACEMENT OF DSTATCOM FOR VOLTAGE SAG MITIGATION
D.K. TANTI,,BRIJESH SINGH,DR. M.K. VERMA,,DR. O. N. MEHROTRA
International Journal of Engineering Science and Technology , 2011,
Abstract: Voltage sag has been considered as one of the most harmful power quality problem as it may significantly affect industrial production. This paper presents an Artificial Neural Network (ANN) based approach for optimal placement of Distribution Static Compensator (DSTATCOM) to mitigate voltage sag under faults. Voltage sag under different type of short circuits has been estimated using MATLAB/SIMULINK software. Optimal location of DSTATCOM has been obtained using a feed forward neural network trained by post-fault voltage magnitude of three phases at different buses. Case studies have been performed on IEEE 14-bus system and effectiveness of proposed approach of DSTATCOM placement has been established.
Optimal Placement of Custom Power Devices in Power System Network to Mitigate Voltage Sag under Faults
D.K. Tanti,M.K. Verma,Brijesh Singh,O.N. Mehrotra
International Journal of Power Electronics and Drive Systems , 2012, DOI: 10.11591/ijpeds.v2i3.370
Abstract: Voltage sag has been considered to be a serious power quality problem faced by many utilities. Placement of custom power devices may prove to be an effective remedy for solving power quality problems. In this paper, an Artificial Neural Network (ANN) based approach for optimal placement of Distribution Static Synchronous Compensator (DSTATCOM), Dynamic Voltage Restorer (DVR) and Unified Power Quality Conditioner (UPQC) in a power system network has been considered to mitigate voltage sag under faults. Voltage sag under different type of short circuits has been estimated using MATLAB/SIMULINK software. Optimal location of custom power devices has been obtained using a feed forward neural network trained by post-fault voltage magnitude of three phases at different buses. A comparative performance of DSTATCOM, DVR and UPQC in voltage sag mitigation has been studied to select most effective controller out of three controllers for the system. Case studies have been performed on IEEE 14-bus system. The effectiveness of proposed approach of placement of custom power devices has been established on the test system considered.
Sensitivity of Planktonic Aquatic Bacteria to Ciprofloxacin  [PDF]
Brij Verma, David Verma
Advances in Microbiology (AiM) , 2016, DOI: 10.4236/aim.2016.610074
Abstract: Many anthropogenic compounds, such as antibiotics, are found at trace levels (<μg·L-1) in aquatic and terrestrial systems. The effect of these compounds on the metabolism and function of microbes are difficult to assess because the assays used, such as the minimum inhibitory concentration (MIC) and the disk diffusion methods, lack the sensitivities to measure bacterial response to these very low levels of antibiotics on bacterial populations. Therefore, we theorized that the [3H] thymidine incorporation into DNA method might be sensitive in determining the effect of DNA inhibiting antibiotics on DNA production in planktonic bacteria in aquatic systems. Utilizing the 3H thymidine method, we measured the effects of ciprofloxacin on DNA production on planktonic bacteria in river and pond waters. Ciprofloxacin significantly (P < 0.02) inhibited river water bacteria at a concentration of 25 μg·L-1 but significant inhibition (P < 0.01) occurred at 1000 μg·L-1in pond water. The very low concentration required to inhibit DNA production in river water bacteria indicates that bacteria are extremely sensitive to antibiotics at very low concentrations. A likely reason for the differences in inhibition between the two waters is due to ciprofloxacin becoming bound, and possibly becoming biologically inactive, in the pond water due to higher dissolved organic carbon content. This work demonstrates that bacteria in some aquatic systems can be significantly impacted by low concentrations of anthropogenic antibiotics finding their way into these systems and that our assumptions as to the concentrations at which antibiotics affect microbes are highly underestimated.
Future of Clinical Trials in Nepal
Brijesh Sathian
Nepal Journal of Epidemiology , 2011,
Abstract: Nowadays the output—and rewards—of research are based almost entirely on published papers in scientific journals. Scientists in low-income and middle-income settings would like to conduct research for their populations according to their own concerns. They want to be in the frontlines of national and global communications about their country’s experiences. I recommend that properly trained clinical trial experts from developed countries should conduct some workshops on the design, conduct and ethical issues in clinical trials to terminate the research misconduct in developing countries.
Introducing the Nepal Journal of Epidemiology: A Pioneer in its Domain
Brijesh Sathian
Nepal Journal of Epidemiology , 2010,
Abstract: The Nepal Journal of Epidemiology is the first journal of its kind in Nepal. Our main objective in pioneering this journal is to attempt to provide a common platform for all researchers, particularly those doing epidemiological studies on prevailing public health problems in the community.
GLYCATED ALBUMIN: AN INDICATOR FOR GLYCEMIC CONTROL
Brijesh Mukherjee
International Journal of Bioassays , 2013,
Abstract: The progressive complications of unmanaged diabetes include heart disease, blindness, kidney failure, amputation of extremities due to circulation problems, and nerve disorders, as well as other chronic conditions. Decades of research have established that prolonged exposure to excess glucose is the cause of diabetes complications, and that long-term control of blood glucose levels is required to avoid or lessen the damage caused by excess glucose. The process of protein glycation is now understood to be both a marker for the progress of diabetes complications and an underlying cause of many of the most serious complications. Diabetes monitoring for protein glycation, an essential element for the long-term control of the complications of diabetes mellitus, is currently managed by a combination of daily self-monitoring of blood glucose (SMBG) measurements and physician-assessed hemoglobin A1c (A1C) levels every 3–6 months. Short term methods like self-monitoring of blood glucose and long term methods like measurement of HbA1c have limitations. Various researchers have identified glycated albumin (GA) as the ideal marker for an intermediate index to measure glycation.
Future of Clinical Trials in Nepal
Brijesh Sathian
Nepal Journal of Epidemiology , 2011, DOI: 10.3126/nje.v1i2.5090
Abstract: Nowadays the output—and rewards—of research are based almost entirely on published papers in scientific journals. Scientists in low-income and middle-income settings would like to conduct research for their populations according to their own concerns. They want to be in the frontlines of national and global communications about their country’s experiences. ?I recommend that properly trained clinical trial experts from developed countries should conduct some workshops on the design, conduct and ethical issues in clinical trials to terminate the research misconduct in developing countries.
Exact solution of the infinite-U Hubbard problem and other models in one dimension
Brijesh Kumar
Physics , 2008, DOI: 10.1103/PhysRevB.79.155121
Abstract: An interacting spin-fermion model is exactly solved on an open chain. In a certain representation, it is the nearest-neighbor Hubbard model in the limit of infinite $U$ (local interaction). Exact solution of its complete energy eigen-spectrum is accomplished by introducing a unitary transformation which maps the original problem to a tight-binding model of the fermions only. Physically, the exact solution implies the absence of Nagaoka ferromagnetism in the ground state for arbitrary electron densities. The present method solves a class of very general models exactly. Few more problems are discussed as an application of this unitary transform method.
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