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Search Results: 1 - 10 of 164057 matches for " B. Shyam Kumar "
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Mesh Technique for Nymble Architecture Sustaining - Secrecy and Security in Anonymizing Networks
J.Praveen Kumar,B.Shyam Kumar
International Journal of Computer Science and Mobile Computing , 2013,
Abstract: Anonymizing networks such as Tor allow users to access Internet services privately by using a series of routers to hide the client’s IP address from the server. The success of such networks, however, hasbeen limited by users employing this secrecy for abusive purposes such as defacing popular websites. Website administrators routinely rely on IP-address blocking for disabling access to misbehaving users, but blocking IP addresses is not practical if the abuser routes through an anonymizing network. As a result, administrators block all known exit nodes of anonymizing networks, denying secrecy access to misbehaving and behaving users alike. To address this problem, present Nymble, a system in which servers can “blacklist”misbehaving users, thereby blocking users without compromising their anonymity. Our system is thus agnostic to different servers’ definitions of misbehavior servers can blacklist user’s .by using of Mesh technique. Which has been completely blocked by several services because of users who abuse their secrecy and providing security with MD5 algorithm
Holistic Psychopharmacology and Promiscuous Plants and Principles of Ayurveda  [PDF]
Shyam Sunder Chatterjee, Vikas Kumar
American Journal of Plant Sciences (AJPS) , 2012, DOI: 10.4236/ajps.2012.327120
Abstract: Consistent neglect of complex psychobiological processes involved in human health and diseases often leads to phar-macological discrepancies between preclinical and therapeutic observations. Numerous other pharmacological paradoxes arise from common practices of using dosing schedules in preclinical studies not identical to those in clinical studies. An Ayurveda centered holistic psychopharmacological strategy evolving from our efforts to identify plants potentially useful for preventing and combating illnesses and diseases could be a more rapid, rational, economically feasible, and realistic one for resolving such discrepancies and paradoxes. In this article, some observations made recently to experimentally very this conviction with the use of some well known medicinal plants are summarized and discussed in short. In addition, usefulness of the strategy for identifying edibles potentially useful for health care purposes, or for more objectively understanding “Ayurvedic biology” is pointed out.
A Green and Reliable Internet of Things  [PDF]
Shyam Sundar Prasad, Chanakya Kumar
Communications and Network (CN) , 2013, DOI: 10.4236/cn.2013.51B011
Abstract: Internet of Things (IoT) is innovation in the field of Communication where a number of intelligent devices are involved sharing information and making collaborative decision. IOT is going to be a market-changing force for a wide variety of real-time monitoring applications, such as E-healthcare, homes automation system, environmental monitoring and industrial automation as it is supporting to a large number of characteristics and achieving better cost efficiency. This article explores the emerging IoT in terms of the potential Energy Efficiency Reliability (EER) issues. This paper discusses the potential EER barriers with examples and suggests remedies and techniques which are helpful in propelling the development and deployment of IoT applications.
Formulation and Evaluation of Indomethacin Microspheres using natural and synthetic polymers as Controlled Release Dosage Forms
Chinna Gangadhar B.,Shyam Sunder R.,Vimal Kumar Varma. M.,Sleeva Raju M.
International Journal of Drug Discovery , 2010,
Abstract: Purpose: The aim of this study was to formulate and evaluate microspheres as controlled releasepreparations of a highly water-insoluble drug, Indomethacin, using natural polymer, Egg albumin; semisynthetic polymer, Ethyl cellulose and Synthetic polymer, Meth acrylic acid esters (Eudragit L 100) as theretardant materials.Methods: Microspheres were prepared by solvent evaporation method using an acetone / liquid paraffinsystem and Phase separation co-acervation method using petroleum ether and coconut oil as dispersionand continuous phase systems. Magnesium stearate was used as the droplet stabilizer and n-hexane wasadded to harden the microspheres. The prepared microspheres were evaluated for their micromeriticproperties, drug content and encapsulation efficiency and characterized by Fourier transform infraredspectroscopy (FT-IR), and scanning electron microscopy (SEM). The in vitro release studies was performedby buffer change method to mimic Gas Intestine Tract(GIT) environment in pH 1.2, carbonate buffer (acidic)and pH 7.4, phosphate buffer (Alkaline).Results: The prepared microspheres were pale yellow, free flowing and spherical in shape. The meanparticle size of the microspheres was found in the range of 150 to 400μm. The drug-loaded microspheresshowed 70-86% of entrapment and release was extended up to 6 to 8 h releasing 86% of the total drug fromthe microspheres. The infrared spectra showed stable character of Indomethacin in the drug-loadedmicrospheres and revealed the absence of drug-polymer interactions. Scanning electron microscopy studyrevealed that the microspheres were spherical and porous in nature.Conclusion: The best-fit release kinetics was achieved with Koresmeyer-Peppas plot followed by zero orderand First order. The release of Indomethacin was influenced by the drug to polymer ratio and particle size &was found to be both diffusion and dissolution controlled.
6. Hepatoprotective activity of Coccinia indica leaves extract
B. Shyam Kumar,D. Gnanasekaran,V. Jaishree,K.P. Channabasavaraj
International Journal of Pharmaceutical and Biomedical Research (IJPBR) , 2010,
Abstract: The leaves of Coccinia indica (Family: Cucurbitaceae) are sweet, acrid, cooling, and astringent to the bowels, cures kapha and pitta. It is cultivated in Africa and Asia particularly in India used as a vegetable. A diethyl ether extract of the leaves was studied for hepatoprotective activity against carbon tetrachloride induced liver toxicity in rats. The results shownhepatoprotective activity of Coccinia indica leave extract at dose 400 mg/kg body weight was comparable with standard treatment 125 mg/kg body weight of silymarin, a known hepatoprotective drug. These data also supplement for histopathological study of rat liver section.
Computation of Error in Estimation of Nonlinearity in ADC Using Histogram Technique  [PDF]
Radhe Shyam Gamad, Deepak Kumar Mishra
Engineering (ENG) , 2011, DOI: 10.4236/eng.2011.36069
Abstract: Computation of error in estimation of nonlinearity in ADC using histogram test are reported in this paper. Error determination in estimation of Differential Nonlinearity (DNL) and Integral Nonlinearity (INL) of an ADC is done by taking deviation of estimated value from actual value. Error in estimated INL and DNL is determined to check the usefulness of basic histogram test algorithm. Arbitrary error is introduced in ideal simulated ADC transfer characteristics and full scale simulated sine wave is applied to ADC for computation of error in estimation of transition levels and nonlinearity. Simulation results for 5 and 8 bit ADC are pre-sented which show effectiveness of the proposed method.
Holistic Psychopharmacology of Fumaria indica (Fumitory)  [PDF]
Anshul Shakya, Shyam Sunder Chatterjee, Vikas Kumar
Chinese Medicine (CM) , 2012, DOI: 10.4236/cm.2012.34028
Abstract:

Fumaria indica is a medicinal plant of the fumitory family wildly growing throughout India. Classical texts of Ayurveda, i.e. the oldest traditionally known health care and medical system originating in Indian subcontinent, mentions diverse medicinal uses of the plant. During more recent decades broad spectrums of therapeutically interesting pharmacological properties of its extracts and secondary metabolites have also been reported. Recent observations made during efforts to define its pharmacological activity profile according to the Ayurvedic concepts of mind body medicine have revealed exceptionally broad spectrums of psychopharmacological activity profiles of diverse types of hydro alcoholic extracts of the plant. These effects of the extracts become apparent after their repeated daily doses only. Taken together with prior preclinical knowledge on the plant, these observations strongly suggest that Fumaria indica could be an easily available source for discovering and developing phyto-pharmaceuticals or drugs potentially useful for treatments of mental health problems commonly associated with numerous physical disorders and chronic diseases. Since several psychoactive and other phytochemical of Fumaria indica are also encountered in other plants commonly used in Chinese and other traditionally known medical systems, observations made and the holistic strategy used for defining its psychopharmacological activity profile could be of interest of others involved in efforts necessary for proper understanding of therapeutic

Beneficial Effects of Fumaria indica on Chronic Stress-Induced Neurobehavioral and Biochemical Perturbations in Rats  [PDF]
Gireesh Kumar Singh, Geeta Rai, Shyam Sunder Chatterjee, Vikas Kumar
Chinese Medicine (CM) , 2012, DOI: 10.4236/cm.2012.31009
Abstract: Objective: To evaluate the anti-stress activity of standardized extract of Fumaria indica (FI) through validated beha-vioral models of rodents followed by estimation of biochemical changes associated with chronic stress. Methods: Fifty percent ethanolic extract of FI used in this study was standardized on its contents of fumaric acid and its conjugates (0.45% and 0.35% respectively). Stressed Charles Foster rats received unpredictable foot shocks (2 mA, 1 hr, 14 days) through electric grid. FI was given orally as 0.3% carboxymethyl cellulose (CMC) suspension in 100, 200 and 400 mg/kg doses. For comparison, Panax ginseng (PG) extract (100 mg/kg, p.o.) was used as standard adaptogen. Incidence of gastric ulceration, changes in weight of adrenal and spleen, behavioral depression, cognitive dysfunction test and suppression of sexual behavior in male rats were used as validated behavioral models. Plasma corticosterone, brain levels of lipid peroxides (LPO), superoxide dismutase (SOD), catalase (CAT) and reduced glutathione (GSH), and expression of cytokines IL-1β, TNF-α and IL-10 in circulating white blood cells (WBC) were quantified for ascertaining biochemical changes accompanying stress. Results: As compared to vehicle treated stressed rats, the FI and PG treated rats showed fewer incidence of gastric ulceration, reversal of changes in weight of adrenal gland and spleen, reversal of behavioral depression, better performance in passive and active avoidance tests for cognitive function and increased sexual activity. FI and PG significantly decreased chronic unpredictable stress induced elevation of corticosterone, and both extracts normalized also the abnormal oxidative status of the brain observed in stressed rats. FI treatment also suppressed the elevated level of IL-1β, TNF-α and IL-10 in stressed animals. Conclusions: FI could be another adaptogenic herb and fumaric acid and its conjugates are possibly involved in observed bioactivity of its extract.
Dual Tracking Method for Real Time Object Tracking using Moving Camera
Shyam Lal,Rahul Kumar
Research Journal of Applied Sciences, Engineering and Technology , 2013,
Abstract: This study presents dual tracking method for real time object tracking using a moving camera. A real time object tracking using self aligning servo mechanism with webcam, dual tracking and effective localization of object is presented. The proposed dual tracking method works in two phases: In first phase tracking is done by joint color texture histogram with mean shift and in second phase tracking is done by servo setup. The proposed dual tracking method enjoys the benefit of double tracking feature, not only tracking but also to find out the coordinates of the tracking object which is of particular interest. The coordinates of a moving object enable us to estimates the real time location of the object which is helpful in surveillance and shooting purposes of suspected person in security area. The tracking of some specific objects in real life is of particular interest. Due to its enhanced automation the proposed dual tracking method can be applied in public security, surveillance, robotics and traffic control etc. The experimental results demonstrate that the proposed dual tracking method improves greatly the tracking area with accuracy and efficiency and also successfully find the coordinates of moving object.
Obstacle Constrained Total Area Coverage in Wireless Sensor Networks
Shyam M,Anurag Kumar
Computer Science , 2010,
Abstract: This paper deals with the accomplishment of total area coverage of an arbitrary region using sensors with a finite sensing radius of rs. For a given region, we aim to obtain a deterministic placement of sensors which, apart from ensuring that the entire region comes under the purview of at least a single sensor, minimises the number of sensors utilised. We begin by considering regions devoid of obstacles and thus having every location amenable for placement. Herein, we formalise the popular notion that sensors at the centres of the hexagons of a hexagonal tessellation provide the most optimal placement. We then move on to regions which may comprise obstacles of arbitrary size at arbitrary locations. We recognise two distinct classes of obstacles, namely transparent and opaque obstacles, which are distinguished by their ability (or the lack of it) to permit sensing radiation through them. In the real world, transparent obstacles model lakes, ponds and swamps, while the opaque ones stand for, inter alia, hills, trees and walls.We propose a polynomial-time algorithm for achieving optimal placement in the aforesaid scenarios and we prove its convergence.
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