OALib Journal期刊

ISSN: 2333-9721




2019 ( 38 )

2018 ( 224 )

2017 ( 255 )

2016 ( 349 )


匹配条件: “Rajasekar G” ,找到相关结果约189646条。
Rajasekar G
Journal of Global Research in Mathematical Archives , 2013,
Abstract: In this paper we have established some results to find cyclic path covering number of digraph based on the degree sequence. Already some results have been established to find the cyclic path covering number of digraph for the Hamiltonian digraph. On a further development of that paper here we have established some more results to find the cyclic path covering number of any digraph based on the degree sequence of the digraph.
S. Punitha,G. Sabitha,Vishal Kalal,S. Rajasekar
International Research Journal of Pharmacy , 2011,
Abstract: The purpose of writing this review on the floating drug delivery systems (FDDS) was to compile the recent literature with special focus on the principal mechanism of floatation to achieve gastric retention. FDDS is one of the approaches in chronotherapeutic drug delivery. In the past reviews of FDDS the physiological and formulation variables affecting gastric retention, approaches to design single-unit and multiple-unit floating systems, their classification and formulation aspects have been covered. This review summarizes the special focus on chronotherapeutics, diseases affected by biological rhythm, its importance, advantages, various approaches in Chronotherapeutic drug delivery and applications of FDDS. These systems are useful for several problems encountered during the development of a pharmaceutical dosage forms.
Ganesh Kumar A,Rajasekar V,Selvakumar G,Dhanalakshmi DP
International Research Journal of Pharmacy , 2012,
Abstract: An indirect enzyme-linked immunosorbent assay (ELISA) was compared with the microscopic agglutination test (MAT) for the diagnosis of bovine leptospirosis. Blood samples from a total number of 319 HBsAg negative suspected leptospirosis case’s were received from Government Hospital and from a few private hospitals of Salem district, Tamilnadu, India. The serum samples were examined for the presence of anti leptospiral antibodies using a commercial qualitative method of an in-house Dot-ELISA assay and the results were compared with WHO standard Microscopic Agglutination Test (MAT). The following interesting results were noted, 132 (41.7 %) serum samples were positive to Dot-ELISA, while 130 (40.7 %) were positive to MAT. All samples positive to MAT were positive to Dot-ELISA, on of the samples were positive for MAT and negative to Dot-ELISA. The Dot-ELISA showed 100% sensitivity compared to MAT. The current diagnostic Dot-ELISA appears as a rapid, non hazardous and better alternative to MAT for the diagnosis of human Leptospirosis.
Statistical measures and diffusion dynamics in a modified Chua's circuit equation with multi-scroll attractors
G. Sakthivel,S. Rajasekar,K. Thamilmaran,Syamal Kumar Dana
Physics , 2011, DOI: 10.1016/j.molstruc.2012.06.043
Abstract: In this paper the focus is set on a modified Chua's circuit model equation with saw-tooth function in place of piece-wise linear function of Chua's circuit displaying multi-scroll chaotic attractors. We study the characteristic properties of first passage times ($t_\mathrm{FPT}$s) to $n$th scroll chaotic attractor, residence times ($t_\mathrm{RT}$s) on a scroll attractor and returned times ($t_\mathrm{RET}$s) to the middle-scroll attractor. $t_\mathrm{FPT}$s exhibit a series of Gaussian-like distribution followed by a long tail continuous distribution. $t_\mathrm{RT}$s and $t_\mathrm{RET}$s show completely discrete distribution. Power-law variation of mean values of $t_\mathrm{FPT}$s, $t_\mathrm{RT}$s and $t_\mathrm{RET}$s with a control parameter is found. On the other hand, mean values of $t_\mathrm{FPT}$s and $t_\mathrm{RET}$s have linear dependence with the number of the scroll attractors for fixed values of the control parameter. For the system with infinite scroll chaotic attractors normal diffusive motion occurs. In the normal diffusion process the mean square displacement grows linearly with time.
Note on Three Classes of Data Grid Operations  [PDF]
Arcot Rajasekar, Hao Xu, Reagan Moore
Journal of Computer and Communications (JCC) , 2014, DOI: 10.4236/jcc.2014.26001

Traditional grid computing focuses on the movement of data to compute resources and the management of large scale simulations. Data grid computing focuses on moving the operations to the storage location and on operations on data collections. We present three types of data grid operations that facilitate data driven research: the manipulation of time series data, the reproducible execution of workflows, and the mapping of data access to software-defined networks. These data grid operations have been implemented as operations on collections within the NSF DataNet Federation Consortium project. The operations can be applied at the remote resource where data are stored, improving the ability of researchers to interact with large collections.

Multidetector Computed Tomography Evaluation of Mediastinal Lesions with Histopathological Diagnosis  [PDF]
Venkateshwaran Arumugam, Hajimohammed Nazir, Konduru Varadarajulu Rajasekar
Open Journal of Respiratory Diseases (OJRD) , 2015, DOI: 10.4236/ojrd.2015.53006
Abstract: The evaluation of mediastinal abnormalities is a challenging radiographical problem. Cross-sectional imaging of the mediastinum by computed tomography now demonstrates precise anatomic details and is the imaging modality of choice for most mediastinal lesions. The following study was undertaken with the objectives of determining the mediastinal lesions affecting the mediastinum and to correlate the computed tomography findings with the histopathology reports. In this study, 50 patients clinically suspected with mediastinal mass lesions or who had chest radio-graph with a suspicious mediastinal lesion were evaluated from October 2013 to September 2014. In our study, we used varying computed tomography features of each mediastinal pathology types to predict a histological diagnosis of mediastinal lesions. Most of the lesions could be predicted with good sensitivity, specificity and diagnostic accuracy.
Enrichment of Biogas Slurry Vermicompost with Azotobacter chroococcum and Bacillus megaterium
Natchimuthu Karmegam,Kuppuraj Rajasekar
Journal of Environmental Science and Technology , 2012,
Abstract: The present study has been conducted on the enrichment of biogas slurry vermicompost with microbial inoculants Azotobacter chroococcum and Bacillus megaterium, optimization of inoculum level and time inoculation during vermicomposting along with the survival rate of each microbial inoculant, the total microbial population and their correlation during the storage. On 0, 10, 20 and 30th day of inoculation showed decrease in the viable population of A. chroococcum and B. megaterium inoculated at the rate of 30, 35 and 40 mL-1 175 g of substrate, towards the progression of storage period of vermicompost, uniformly. The change of A. chroococcum and B. megaterium in the vermicompost (at 30, 35 and 40 mL-1 175 g substrate) with reference to the storage period (180 days) showed highly significant negative correlation (p<0.001). In all the four treatments, the viable population of A. chroococcum and B. megaterium at the rate of 30, 35 and 40 mL-1 175 g substrate from 0th day (after harvest) onwards showed statistically significant decline with that of storage period of vermicompost. This trend was observed uniformly for both the microbial inoculants, inoculated on 0, 10, 20 and 30th day of vermicomposting. In the present study, total microbial population in A. chroococcum and B. megaterium inoculated vermicompost was high during the initial phases of storage and then total microbial population declined towards the end. The vermicompost inoculated on 20th day of vermicomposting with A. chroococcum at the rate of 35 mL-1 175 g of substrate showed 11, 9, 8, 6, 3 and 0x107 cfu g-1 population of total microorganisms, respectively during 0, 15, 45, 75, 105 and 135th day of storage. Similar trend of results were obtained for B. megaterium inoculated vermicompost suggesting that the overall maintenance of total microbial population in vermicompost is similar in the vermicomposts with any microbial inoculants.
Ludwig Edward Boltzmann
S. Rajasekar,N. Athavan
Physics , 2006,
Abstract: In this manuscript we present a brief life history of Ludwig Edward Boltzmann and his achivements. Particularly, we discuss his H-theorem, his work on entropy and statistical interpretation of second-law of thermodynamics. We point out his some other contributions in physics, characteristics of his work, his strong support on atomism, character of his personality and relationship with his students and final part of his life.
Ghost-Stochastic Resonance in a Unidirectionally Coupled and Small-World Networks
S. Rajamani,S. Rajasekar
Physics , 2015,
Abstract: Ghost-stochastic resonance is a noise-induced resonance at a missing fundamental frequency in the input signal. In this paper we investigate the features of ghost-stochastic resonance in a unidirectionally coupled network and small-world network with each unit being bistable Bellows map. In the one-way coupled network we apply a multi-frequency signal $(1/n_{\mathrm{f}}) \sum_{j=1}^{n_{\mathrm{f}}} \cos (\omega_{j}n)$, $n=0,1,2,\cdots$, $\omega_{j}=(k+j-1)\omega_{0}$, with $k$ being an integer $\ge2$ (without the fundamental frequency $\omega_{0}$) and noise to first unit only. We show the occurrence of resonance and undamped signal propagation for coupling strength above a certain critical value. The response amplitude shows sigmoidal function type variation with unit number. We report the effect of coupling strength $\delta$, $k$ and $n_{\mathrm{f}}$ on the response amplitude. In the small-world network randomness in the connectivity topology is described by the probability $p$ of rewiring of units in a ring type regular network where all the units are subjected to noise and multi-frequency signal. We present the influence of $p$ and the coupling strength on the probability distribution of response amplitude $Q$ of various units, $\langle Q \rangle$ and the maximum value of $Q$.
Enhanced signal propagation in a network with unidirectional and random couplings
S. Rajamani,S. Rajasekar
Physics , 2014,
Abstract: We investigate the effect of unidirectional regular and random couplings of units in a network on stochastic resonance. For simplicity we choose the units as Bellows map with bistability. In a regular network we apply a weak periodic signal and noise to first unit only. Above certain coupling strength undamped and enhanced signal propagation takes place. Resonance occurs at the same value of noise intensity in all units. The response amplitude displays sigmoidal function type variation with unit number. When all the units are driven by the weak periodic force and noise oscillatory variation of response amplitude with unit number occurs. In the network with random coupling all the units are subjected to periodic force and noise. In this case the value of noise intensity at which resonance occurs and the corresponding value of average response amplitude increases nonlinearly with the number of units wired. Numerical simulation with multiple couplings shows that in both type of networks single coupling is sufficient to realize a great improvement in stochastic resonance and signal propagation.

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