OALib Journal期刊

ISSN: 2333-9721




2019 ( 17 )

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匹配条件: “Chandra Sekhar K” ,找到相关结果约140753条。
Analysis of Transaction and Concurrency Mechanism in Two Way Waiting Algorithm for different Databases
International Journal of Computer Science and Communication Networks , 2012,
Abstract: Database is the well-organized collection of data in a meaningful way that user can perform the transaction. Transaction is a sequence of many actions considered to be atomic. In the coming months or years you will probably be implementing applications for multiple users to use across a network. Client/server environments are designed specifically for this purpose. Traditionally, a server (in this case, a database server) supports multiple network connections to it. As often happens with technology, this newfound flexibility adds a new degree of complexity to the environment. The throughput of the transactions can be increased by performing the transactions in parallel. Transactions are performed in parallel without infringing the data integrity. When the transactions are executing in parallel then this will lead to concurrency in database and deadlock of the transaction. This work will analyze how and is done to prevent the occurrence of deadlock and also improves system performance by shrink the number of restarts transaction which also saves the time and cost for performing the transaction in the system. So, it improves the efficiency of the distributed system.
Chandra Sekhar.k*
International Journal of Pharmacy and Technology , 2010,
Abstract: Background: The Government of India, WHO and World Bank together reviewed the NTP in the year 1992. The revised strategy was introduced in the country as a Pilot Project since 1993 in a phasedmanner as Pilot Phase I, Pilot Phase II and Pilot Phase III. By the end of 1998, only 2 per cent of the total population of India was covered by RNTCP.Objectives:1. To know the sputum conversion rate among the sputum positive tuberculosis patients.2. To find the treatment outcome of smear positive tuberculosis patients.Methodology: This Hospital based descriptive study was carried out among the out patients attending Medicine, Surgery, OBG, ENT, Dermatology, TB and Chest Department of MNR Medical College during the period of January 1st to December 2006. Oral questionnaire prepared and applied to all the individuals (377 TB suspects) those who visited for sputum examination at DMC.Results: Out of 138 TB Cases 67.3% cases were pulmonary and 32.7% were extra pulmonary. Out of 58 sputum positive cases, 49 cases returned for sputum examination at successive months and rest were transfer out. Of these 49 cases, 46 cases have converted negative at 2, 4, 6 months respectively and remaining 3 cases had sputum conversion at 3,5, 7 months. Tuberculosis prevalence increased withage i.e. above 15 years of age group and significant association was found (P< 0.001). HIV- TB Co-Infection was found in 2 cases (1.4%) of the total TB (138) cases.Conclusions: Out of 58 sputum positive cases, 4 cases (4/58) not traced and 5 cases (5/58) transferred out to neibouring districts. There is a need to increase RNTCP network to minimize the dropouts.
Extracting TARs from XML for Efficient Query Answering
Chandra Sekhar.K,Dhanasree
International Journal of Computer Science and Network , 2012,
Abstract: The massive amount of datasets expressed in different formats,such as relational, XML, and RDF, avail-able in several realapplications, may cause some difficulties to non-expert userstrying to access these datasets without having sufficientknowledge on their content and structure. Moreover, theprocesses of query composition, especially in the absence of aschema, and interpretation of the obtained answers may benon-trivial. The existing data mining process is often guided bythe designer, who determines the portion of a dataset whereuseful patterns can be extracted based on his/her deepknowledge of the application scenario. In this paper, wepropose efficient mining techniques to mine hiddeninformation from huge datasets, and then use it in order to gainuseful knowledge which helps inexperienced users to accesshuge XML datasets. We also describe XML mining tool whichimplemented using Java encompasses two main features 1) itmines all the frequent association rules from input documentswithout any a-priori specification of the desired results 2) itprovides quick, summarized, thus often approximate answersto user’s queries, by using the previously mined knowledge.
Fast computing neural network modeling for fault diagnosis in power systems
P. Chandra Sekhar,B. V. Sanker Ram,K. S. Sarma
Journal of Engineering and Applied Sciences , 2010,
Abstract: In this paper an approach for fault location based on online neural network is designed. The approach of learning the neural network based on the running fault values are trained for the suggested neural network. This approach result in running fault diagnosis based on the fault observation parameter based on the diagnosis tool. The approach is designed to run on running values of the distributed system so as to overcome the level of fault happening in a run time environment, which is not observed in case of the conventional neural controlling method.
A spectral-neuro modeling for fault location and diagnosis in distributed power system
P. Chandra Sekhar,B. V. Sanker Ram,K. S. Sarma
Journal of Engineering and Applied Sciences , 2010,
Abstract: In this paper an approach for the improvement of the neural training error and its improvement for real time system is developed. The approach of learning the neural network is developed using the advanced feature of wavelet transformation approaches and is designed to observe even the minor current variations, which result in variation in the observation result. In this paper a contribution towards the accurate estimation of the current disturbance is developed using DWT learning for a neuro classifier.
High-Performance Advanced Discontinuous PWM Algorithm for Direct Torque Controlled Induction Motor Drives for Reduced Ripple
International Journal of Engineering Science and Technology , 2011,
Abstract: In this paper a high performance advanced discontinuous pulse width modulation (ADPWM) based direct torque controlled (DTC) induction motor drive operating at high line side voltages is proposed. Theproposed ADPWM based IM drive uses a special category of sequences which not only reduces the switching losses but also reduces the line current distortion during high speed operations. However analysis in this paper is limited to harmonic ripple in line current and comparison of the proposed method is done with the conventional DTC (CDTC), conventional space vector pulse width modulation (CSVPWM) based DTC and clamping sequences based DTC. The proposed method uses a special category of DPWM sequences, 0121 and 7212. This category of DPWM sequences are referred as double switching clamping sequences as they not only clamp one of the phase to either of the buses but alsoswitches one of the remaining two phases twice in every sub cycle. In this paper it is shown that, utilizing DPWM sequences and by changing the zero state at any spatial angle where is between 00 and600an infinite number of ADPWM methods can be generated which are categorized as “continual clamping” and “split clamping” sequences. It will be shown that steady state line current distortion at higher line side voltages is reduced significantly compared with the CDTC, CSVPWM based DTC as well as the ADPWM based DTC using clamping sequences.
Comparison of Fast Block Matching Algorithms for Motion Estimation
Chandra Sekhar. CH,J.V.K. Ratnam
International Journal of Electronics and Computer Science Engineering , 2012,
Abstract: This paper is a review of the block matching algorithms used for motion estimation in video compression. It implements and compares several different types of block matching algorithms that ranges from the very basic Exhaustive Search to the recent fast adaptive algorithms like Adaptive Rood pattern Search Algorithm. The algorithms that are evaluated in this paper are widely accepted by the video compressing community and have been used in implementing various standards, ranging from MPEG1 / H.261 to MPEG4 / H.263. The paper also presents a very brief introduction to the entire flow of video compression.
International Journal of Engineering Science and Technology , 2011,
Abstract: In this paper, the effect of placement of zero-space vector for the implementation of space vector based Pulse Width Modulation techniques for 3-phase Voltage Source Inverter is presented. Several pulse width modulation (PWM) control strategies have been proposed for 3-phase voltage source inverter (VSI) in the past. It is known that space vector modulation (SVM) offers a degree of freedom in its implementation with regard to the placement of the zero-space vector. Apart from constructing a consistent theoretical framework, simulation results with conventional continuous SVM and various discontinuous SVM techniques are presented and all the cases are compared in this paper.
Plant toxins-useful and harmful effects
Chandra Sekhar J,Sandhya S*,Vinod KR,Sudhakar K
Hygeia : Journal for Drugs and Medicines , 2012,
Abstract: Plan: To review the useful andharmful effects of plant toxins.Prologue: Poisonous chemicals found in plants are normal biochemicals.They have been developed as an evolutionary response for self-protection.Therefore, plants are deliberately poisonous and their toxicity to humans andother animals is an example of natural selection.. The surviving plants,therefore, have not been subjected to selective pressures which might influencethem to produce toxins. The alkaloids are by far the most predominant of planttoxins and because of their enormous structural diversity and various modes ofaction, examples may be chosen from among them to serve as paradigms forvirtually every type of plant-herbivore interaction.Outcome: Since plant toxins show many useful effects they can be usedin treating respective diseases. They can be modified to show better affinityand efficacy. Regardless of the structure of a particular toxin, it is likelyto have evolved and been elaborated biosynthetically under pressure from aspecific predator or limited group of predators. Commercial crops for humanfood usage must therefore have optimal concentration of biologically activenatural products, low enough to be nontoxic to the consumer (at least wheneaten in reasonable quantities) but sufficiently great to repel or limit pests.
Fabrication and evaluation of oral tablets using natural mucoadhesive agent from seeds of Caesalpinia pulcherrima (L.) SW
Jeevanandham S,Dhachinamoorthi D,Senthil V,Chandra Sekhar K
Asian Journal of Pharmaceutics , 2010,
Abstract: Oral mucoadhesive sustained drug delivery systems of salbutamol sulfate were formulated using an isolated natural agent from the seeds of Caesalpinia pulcherrima. The isolated material was evaluated for various parameters, such as, melting point, viscosity, pH, elemental analysis, swelling index, phytochemical constituents, and solubility studies. The mucoadhesive characters of the isolated substance were identified by a comparative study with hydroxyl propyl cellulose and sodium alginate, by various in vitro methods, such as, Shear stress measurement, Wilhelmy′s method, Falling sphere method, and Detachment force measurement. Formulation and evaluation of mucoadhesive oral tablets of salbutamol sulfate (100 mg), using isolated natural materials in different proportions, and in vitro release studies, were carried out for three different formulations according to the U.S.P apparatus two (paddle method). Each 100 mg tablet was taken in 900 ml of acid buffer 1.2 and maintained at 37 C. After two hours the filtrate was collected and replaced in buffer 7.4. In vitro releases of three different formulations for nine hours were studied, which showed the sustained action of drug release with increasing the concentration of the isolated natural mucoadhesive agent in the formulations.

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