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Search Results: 1 - 10 of 201010 matches for " PRITAM P. KOTHARI "
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Indian Streams Research Journal , 2012,
Abstract: Electronic Customer Relationship Management (E-CRM) has become the latestparadigm in the world of Customer Relationship Management. E-CRM is becomingmore and more necessary as businesses take to the web. This paper promotes the value ofE-CRM, explores its benefits, outlines the focal points to address prior toimplementation, outlines potential pitfalls during implementation and ways to avoid,takes a look at recent trends and presents a proven E-CRM success story. ElectronicCustomer Relationship Management (E-CRM) has attracted the attention of managersand academic researchers for the past several years. Issues of E-CRM have varied frommarketing to information technology.
Orgasm : a new classification.
Kothari P
Journal of Postgraduate Medicine , 1988,
Solving Optimal Power Flow Using Modified Bacterial Foraging Algorithm Considering FACTS Devices  [PDF]
K. Ravi, C. Shilaja, B. Chitti Babu, D. P. Kothari
Journal of Power and Energy Engineering (JPEE) , 2014, DOI: 10.4236/jpee.2014.24086
Abstract: In this paper, a new Modified Bacterial Foraging Algorithm (MBFA) method is developed to incorporate FACTS devices in optimal power flow (OPF) problem. This method can provide an enhanced economic solution with the use of controllable FACTS devices. Two types of FACTS devices, thyristor controlled series compensators (TCSC) and Static VAR Compensator (SVC) are considered in this method. The basic bacterial foraging algorithm (BFA) is an evolutionary optimization technique inspired by the foraging behavior of the E. coli bacteria. The strategy of the OPF problem is decomposed in two sub-problems, the first sub-problem related to active power planning to minimize the fuel cost function, and the second sub-problem designed to make corrections to the voltage deviation and reactive power violation based in an efficient reactive power planning of multi Static VAR Compensator (SVC). The specified power flow control constraints due to the use of FACTS devices are included in the OPF problem. The proposed method decomposes the solution of such modified OPF problem into two sub problems’ iteration. The first sub problem is a power flow control problem and the second sub problem is a modified Bacterial foraging algorithm (MBFA) OPF problem. The two sub problems are solved iteratively until convergence. Case studies are presented to show the effectiveness of the proposed method.
International Journal of Engineering Science and Technology , 2011,
Abstract: We propose and implement a pyramidal image blending algorithm using modern programmable graphic processing units. This algorithm is an essential part of an image stitching process for a seamless panoramicmosaic. The CUDA framework is a novel GPU programming framework from NVIDIA. We realize significant acceleration in computations of the pyramidal image blending algorithm by utilizing the CUDA as acomputational resource. Specifically we demonstrate the efficiency of our system by parallelization of the algorithm and optimization of the memory resources of the GPU. We compare the execution time of the CPU as well as various CUDA based implementations. Just parallelization of the algorithm by the CUDA framework provides 20 times speedup, whereas optimizing the GPU memory IO gives more than 30 times speedup.
Impact of Reactive Power in Power Evacuation from Wind Turbines  [PDF]
Ashish Ranjan, S. Prabhakar Karthikeyan, Ankur Ahuja, K. Palanisamy, I. Jacob Raglend, D. P. Kothari
Journal of Electromagnetic Analysis and Applications (JEMAA) , 2009, DOI: 10.4236/jemaa.2009.11004
Abstract: Application of Distributed Generation (DG) to supply the demands of a diverse customer base plays a vital role in the renewable energy environment. Various DG technologies are being integrated into power systems to provide alterna-tives to energy sources and to improve reliability of the system. Power Evacuation from these remotely located DG’s remains a major concern for the power utilities these days. The main cause of concern regarding evacuation is con-sumption of reactive power for excitation by Induction Generators (IG) used in wind power production which affects the power system in variety of ways. This paper deals with the issues related to reactive power consumption by Induc-tion generators during power evacuation. Induction generator based wind turbine model using MATLAB/SIMULINK is simulated and its impact on the grid is observed. The simulated results are analyzed and validated with the real time results for the system considered. A wind farm is also modeled and simulations are carried out to study the various im-pacts it has on the grid & nearby wind turbines during Islanding and system event especially on 3-Phase to ground fault.
New Control Algorithm for Capacitor Supported Dynamic Voltage Restorer  [PDF]
Bhim Singh, Pychadathil Jayaprakash, D.P. Kothari, Ambrish Chandra, Kamal- Al-Haddad
Journal of Electromagnetic Analysis and Applications (JEMAA) , 2011, DOI: 10.4236/jemaa.2011.37045
Abstract: In this paper, a simple control algorithm for the dynamic voltage restorer (DVR) is proposed to mitigate the power quality problems in terminal voltage such as sag, swell, harmonics, unbalance etc. Two PI (proportional-integral) controllers are used each to regulate the dc bus voltage of DVR and the load terminal voltage respectively. The fundamental component of the terminal voltage is extracted using the synchronous reference frame theory. The control signal for the series connected DVR is obtained indirectly from the extracted reference load terminal voltage. The proposed DVR control strategy is validated through extensive simulation studies using MATLAB software with its Simulink and Sim-power system (SPS) block set tool boxes.
Solar energy estimation using REST2 model
M. Rizwan, Majid Jamil, D. P. Kothari
International Journal of Energy and Environment , 2010,
Abstract: The network of solar energy measuring stations is relatively rare through out the world. In India, only IMD (India Meteorological Department) Pune provides data for quite few stations, which is considered as the base data for research purposes. However, hourly data of measured energy is not available, even for those stations where measurement has already been done. Due to lack of hourly measured data, the estimation of solar energy at the earth’s surface is required. In the proposed study, hourly solar energy is estimated at four important Indian stations namely New Delhi, Mumbai, Pune and Jaipur keeping in mind their different climatic conditions. For this study, REST2 (Reference Evaluation of Solar Transmittance, 2 bands), a high performance parametric model for the estimation of solar energy is used. REST2 derivation uses the two-band scheme as used in the CPCR2 (Code for Physical Computation of Radiation, 2 bands) but CPCR2 does not include NO2 absorption, which is an important parameter for estimating solar energy. In this study, using ground measurements during 1986-2000 as reference, a MATLAB program is written to evaluate the performance of REST2 model at four proposed stations. The solar energy at four stations throughout the year is estimated and compared with CPCR2. The results obtained from REST2 model show the good agreement against the measured data on horizontal surface. The study reveals that REST2 models performs better and evaluate the best results as compared to the other existing models under cloudless sky for Indian climatic conditions.
Effect of vitamin C deficiency on testicular structure in the guinea pig.
Sapra M,Sharma P,Kothari L
Journal of Postgraduate Medicine , 1987,
Extruded ventriculo-peritoneal shunt: An unusual complication
Kothari P,Shankar Gowri,Kulkarni Bharati
Journal of Indian Association of Pediatric Surgeons , 2006,
Genetic expression of Col-2A and Col-10A as a function of administration of IGF-1 & TGF-β with and without anterior mandibular repositioning appliance on the growth of mandibular condylar cartilage in young rabbit  [PDF]
A. S. Patil, R. B. Sable, R. M. Kothari, P. Nagarajan
Open Journal of Stomatology (OJST) , 2013, DOI: 10.4236/ojst.2013.39A002

New Zealand (NZ) young rabbits with the administration of insulin-like growth factor (IGF-1) and transforming growth factor-β (TGF-β) with and without mandibular anterior repositioning appliances are explored for the growth of the mandibular condylar cartilage (MCC). 32 growing NZ and rabbits were divided into 4 groups: the group with saline injection in TMJ, the group which received growth factor injection in TMJ, the group which received anterior positioning appliance and the group which received growth factors injection as well as mandibular repositioning appliance. Gene expression was studied by real-time RT-PCR and cartilage growth by histomorphometry. Administration of growth factors along with mandibular repositioning appliances has induced 1) 1.70-fold expression of Col-2Agene (p value < 0.0005) and 2) 1.47-fold expression of Col-10Agene (p value < 0.0005). In contrast, administration of only mandibular repositioning appliances induced 1) 1.28-fold expression of Col-2Agene (p value < 0.0005) and 2) merely 0.62-fold expression of Col-10Agene (p value < 0.0005), while administration of growth factors only induced 1) mere 0.56-fold expression of Col-2Agene (p value <0.0005) and 2) 0.86-fold expression of Col-10A gene (p value < 0.0005). Administration of growth factors along with mandibular repositioning appliances causes an increase in genetic expressions which have been corroborated by histomorphometry and validated by statistical analysis, during an accelerated growth of mandibular condylar cartilage. Administration of growth factors in the TMJ could provide a synergistic role along with mandibular repositioning appliances for treatment of mandibular retrognathism as well as disorders on the MCC. 

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