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Search Results: 1 - 10 of 130997 matches for " V. Ramachandran "
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Std trends in chengalpattu hospital
Krishnamurthy V,Ramachandran V
Indian Journal of Dermatology, Venereology and Leprology , 1996,
Abstract: A retrospective data analysis was carried out to find the trends in frequency and distribution of different STDs at Chengalpattu during 1988-1994. Of the 4549 patients who attended the clinic 3621 (79.6%) were males and 928 (20.4%) were females. The commonest STD was Chancroid (24.4%) in men and Syphillis (29%) in women. Balanoposthitis (11.4%) ranked third among STDs in males. Though the STD attendance showed a declining trend, most diseases showed a constant distribution. The percentage composition of secondary and latent syphillis, Genital Warts, Genital Herpes and the Non-Venereal group showed an increased composition in recent years. Primary syphillis in females showed a definite declining trend. The HIV sero-positive detection rate was 2.06%. Of the 1116 patients screened for HIV antibody, 23 patients were detected sero-positive. Time Series Regression Analysis was used to predict the number of patients who would attend the STD clinic with various STDs in 1995 and 1996 to help in the understanding of the disease load and pattern in future, in resources management and in developing and evaluating preventive measures.
BYZANTINE FAULT TOLERANCE MODEL FOR SOAP FAULTS
S. Murugan,V. Ramachandran
Indian Journal of Computer Science and Engineering , 2012,
Abstract: The proposed model is to configure Byzantine Fault Tolerance mechanism for every SOAP fault message that is transmitted. The reliability and availability are of major requirements of Web services since they operate in the distributed environment. One of the reliability issues is handling faults. Fault occurs in all the phases of Service Oriented Architecture i.e. during publishing, discovery, composition, binding, and execution. These faults maylead to service downtime, behaves abnormally, and may send incorrect responses. These abnormalities are classified as Byzantine faults in Web services. Even though SOAP specification provides fault handlingmechanisms, the correctness of the received SOAP fault messages are not known. In this paper, a model is proposed to check the correctness of the SOAP fault message received, by incorporating the Byzantine agreement for fault tolerance. The existing fault tolerant mechanism detects server failure and routes the request to the next available server without the knowledge of the client. The proposed model ensures a transparent environment by providing fault handling information to the client. This is achieved by incorporating an activereplication technique.
Electromagnetic Interference in Implantable Rhythm Devices: Comment
Ramachandran P.V.
Indian Pacing and Electrophysiology Journal , 2002,
Abstract: This is a short comment on the editorial on Electromagnetic Interference in Implantable Rhythm Devices - The Indian Scenario in the July-September issue of the journal.1 Regarding the statement: "Systems working at 0.5 Tesla are available in the country so that it may be considered in such situations..." , though the author conveys his point, it gives reader a feeling that 0.5 Tesla magnetic resonance imaging (MRI) units are advantageous. In fact for every other diagnostic purpose we would like to have higher Tesla MRI units. The 0.5 Tesla unit is inferior compared to higher Tesla systems. The cry of Eastern European countries in a conference held in November 2001 at Antwerpen by the European Working Group on Management in Radiology (EWGMR), was that they have only 0.5 Tesla magnets and so they can not do this , that , no functional MRI , no stroke imaging etc etc... But a western European reader can get confused. I do not think there will be a single system working at 0.5 Tesla in countries like Germany.
Effects of Low-Power Microwave Fields on Seed Germination and Growth Rate  [PDF]
Lakshmappa Ragha, Seema Mishra, V. Ramachandran, Manmohan Singh Bhatia
Journal of Electromagnetic Analysis and Applications (JEMAA) , 2011, DOI: 10.4236/jemaa.2011.35027
Abstract: Experiments were conducted to investigate the effects of low power microwave radiation on germination and growth rate in seeds. In the present paper, the bioeffects of low power (non-thermal intensity) microwave modulated with 1 KHz square wave have been studied. Experiments were performed in X-band frequencies using klystron based microwave test bench. Microwave parameters like frequency, power, exposure time and power density were varied while irradiating seed samples to study their influence on germination. The seed samples used for the experiment included wheat (Triticum aestivum), bengal gram (Cicer arietinum), green gram (Vigna radiate) and moth bean (Vigna Aconitifolia). Seed germination %, plant height, root length and dry matter % (biomass %) were recorded and compared with control seeds. The effects of different treatments were found to be stimulating the germination and seedling vigour of plants especially in power and exposure time treatments while increase in frequency and power density has reduced the seed germination and seedling vigour. The effect also varied with the nature of seeds.
Survival of the Synesthesia Gene: Why Do People Hear Colors and Taste Words?
David Brang,V. S. Ramachandran
PLOS Biology , 2012, DOI: 10.1371/journal.pbio.1001205
Abstract: Synesthesia is a perceptual experience in which stimuli presented through one modality will spontaneously evoke sensations in an unrelated modality. The condition occurs from increased communication between sensory regions and is involuntary, automatic, and stable over time. While synesthesia can occur in response to drugs, sensory deprivation, or brain damage, research has largely focused on heritable variants comprising roughly 4% of the general population. Genetic research on synesthesia suggests the phenomenon is heterogeneous and polygenetic, yet it remains unclear whether synesthesia ever provided a selective advantage or is merely a byproduct of some other useful selected trait. Progress in uncovering the genetic basis of synesthesia will help us understand why synesthesia has been conserved in the population.
Integrated Security Monitor Model for Enhancing Application Security
Sheila Anand,V.Ramachandran
Asian Journal of Information Technology , 2012,
Abstract: The objective of this paper is to propose an integrated security monitor model for protecting business software applications. Security monitors have been designed to directly integrate with the applications and protect them from malicious activities by monitoring all user access to the application resources. Rule-base approach has been used to define permissible actions of users. User requests are analyzed before being processed by the application and the application response to the user requests are also analyzed to block access to unauthorized information. Knowledge of application characteristics enables such monitors to be specifically tailored to protect against misuse of application resources. User activities and usage of application resources have been logged for future analysis. Security offered is two-fold; protection from external intruders and protection from internal intruders being legitimate users who misuse their access privileges to gain unauthorized access to confidential information. The proposed model is a general one and can be implemented for any application. The model has been successfully tested with Email and File Transfer applications.
An MPLS Based Load Balancing Technique for VoIP Flows
J. Faritha Banu,V. Ramachandran
Asian Journal of Information Technology , 2012, DOI: 10.3923/ajit.2012.252.260
Abstract: The tremendous growth of internet increase the enormous pressure on internet service providers to ensure quality of service for real time applications such as voice over IP and video on demand. These applications are very sensitive to delay, jitter, packet loss and needs to be engineered. In this study, a multi protocol label switching based load balancing technique is proposed to enhance the quality of service for VoIP applications. The proposed study is implemented with an effective flow classification technique and prioritizes the voice packets based on their flow arrival rate and bandwidth utilization. The link failure or system failure in IP network causes load unbalanced situation and increases the congestion in the network. During this load unbalanced condition both responsive and unresponsive VoIP flows are rerouted into congestion free constraint based least loaded multiple paths. The non VoIP data flows are routed using Stream Control Transmission Protocol Multihomming technique. Simulation results are reported to show the efficiency of the proposed technique.
An MPLS based Load Balancing Technique for VoIP flows
J. Faritha Banu,V. Ramachandran
Information Technology Journal , 2013,
Abstract: The tremendous growth of internet increase the enormous pressure on internet service providers to ensure Quality of Service for real time applications such as Voice over IP and Video on demand. These applications are very sensitive to delay, jitter, packet loss and needs to be engineered. In this study, a Multi Protocol Label Switching (MPLS) based load balancing technique is proposed to enhance the quality of service for VoIP applications. The proposed study is implemented with an effective flow classification technique and prioritizes the Voice packets based on their flow arrival rate and bandwidth utilization. The link failure or system failure in IP network causes load unbalanced situation and increases the congestion in the network. During this load unbalanced condition both responsive and unresponsive VoIP flows are rerouted into congestion free constraint based least loaded multiple paths. The non VoIP data flows are routed using Stream Control Transmission Protocol Multihomming technique. Simulation results are reported to show the efficiency of the proposed technique.
Survival of the Synesthesia Gene: Why Do People Hear Colors and Taste Words?
David Brang ,V. S. Ramachandran
PLOS Biology , 2011, DOI: 10.1371/journal.pbio.1001205
Abstract: Synesthesia is a perceptual experience in which stimuli presented through one modality will spontaneously evoke sensations in an unrelated modality. The condition occurs from increased communication between sensory regions and is involuntary, automatic, and stable over time. While synesthesia can occur in response to drugs, sensory deprivation, or brain damage, research has largely focused on heritable variants comprising roughly 4% of the general population. Genetic research on synesthesia suggests the phenomenon is heterogeneous and polygenetic, yet it remains unclear whether synesthesia ever provided a selective advantage or is merely a byproduct of some other useful selected trait. Progress in uncovering the genetic basis of synesthesia will help us understand why synesthesia has been conserved in the population.
ENHANCED DISTRIBUTED SERVICE MODEL FOR POWER SYSTEM STATE ESTIMATION
V.Gomathi,V.Ramachandran
International Journal on Computer Science and Engineering , 2011,
Abstract: Web services are emerging technologies of choice for implementing distributed service models for performing power system operations such as state estimation of power systems in a complete secure, distributed and platform independent environment. The power system applications themselves have been developed in different platforms and language paradigms. Interoperability between power system applications becomes a major issue because of the heterogeneous nature. The main aim of this paper is to propose a model that enhances the interoperability between power system applications byrepresenting the power system data in a more flexible and language independent format (i.e.) in XML and to implement the power system operations in a highly distributed environment. The power systemstate estimation problem is considered for representation and analysis in a distributed environment. The proposed Web service model using JAX-RPC (Java API for XML-based RPC) for state estimation ishighly distributed and has inherent features such as platform ndependency, interoperability, functionreusability, discoverability and security. A generalized XML based data generation model has beenproposed for exchanging data in order to enhance the interoperability between legacy power system applications. The performance of the proposed JAX-RPC model for power system state estimation is compared with the traditional client-server and RMI models using Round Trip Time (RTT) as a measure. (The overhead associated with the proposed model).
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