2014 Fourth International Conference on Advanced Computing & Communication Technologies, 2014
IEEE802.11 wireless networks have become one of the most widely used networks as users can connec... more IEEE802.11 wireless networks have become one of the most widely used networks as users can connect and access the required information anytime and anywhere. Due to open nature of wireless medium, there are many security issues associated with them. In the present work an experimental analysis to study the impact of transmission power of access point on the performance of secure wireless network is analysed in terms of throughput in roaming scenarios for IEEE802.11n WLAN standard. Three power levels high, medium and low have been considered for access point. Analysis has been done in terms of network through put. From the obtained numerical values, it is found that the security performance of transmission power IEEE802.11 LAN slightly changes on varying the transmit power from high level to medium level for both UDP and TCP traffic but on varying the power from medium to low level, the network throughput performance for UDP and TCP traffic is decreased by 3% and 10% respectively.
Recent Patents on Inflammation & Allergy Drug Discovery, 2013
All organisms are protected by their immune system but occasionally this system overreacts leadin... more All organisms are protected by their immune system but occasionally this system overreacts leading to allergic and inflammatory reactions in the body. These reactions are the starting points of various diseases like asthma, eczema and urticaria etc. They involve activation of T cells, release of histamines, toxic chemicals from mast cells and eosinophils respectively. Several chemically and naturally synthesized therapeutic agents are available for the treatment of these immunological diseases. The present review provides a detailed account of mechanism of allergic and inflammatory reactions, its types and various treatment strategies with a special focus on some recent patents in this field.
ABSTRACT Distributed Generation (DG) is growing rapidly in power systems due to their potential s... more ABSTRACT Distributed Generation (DG) is growing rapidly in power systems due to their potential solution for issues, like the deregulation in power system, to meet the power demand and the shortage of transmission capacities. Optimal placement of DG assumes significance that improper allocation of DG sources in power system would not only lead to increased power or energy losses, but can also jeopardize the system operation. Also optimal placement of DG is necessary for the maximization of reliability and stability in power system. In this paper classical grid search algorithm based on successive load flows has been employed to obtain optimal location and size of multiple DG units in radial power system network in order to minimize total active power losses and to improve voltage profile of the system. The proposed method is the extension of single DG placement to the placement of multiple DG units. It is significant because of the fact that with the integration of DG units at various locations, there is more reduction in total power losses and maximum voltage drop in the system is also decreased. The proposed method is tested on 12-bus radial distribution feeder with different sizes of DG source. The obtained results are presented in graphical manner.
IEEE/ACM International Symposium on Low Power Electronics and Design, 2011
... and Computer Engineering, Purdue University, West Lafayette, IN 47907, USA Email: {gupta64,dm... more ... and Computer Engineering, Purdue University, West Lafayette, IN 47907, USA Email: {gupta64,dmohapat,sppark,raghunathan,kaushik}@purdue.edu ... REFERENCES [1] R. Hegde and N. Shanbhag, Energy-efficient signal processing via algo-rithmic noise-tolerance, in Proc. ...
2010 IEEE International Conference on Computer Design, 2010
Abstract In this paper, we present a unified approach to an energy-efficient variation-tolerant ... more Abstract In this paper, we present a unified approach to an energy-efficient variation-tolerant design of Discrete Wavelet Transform (DWT) in the context of image processing appli-cations. It is to be noted that it is not necessary to produce exactly correct numerical ...
Abstract In this paper, we present a unified approach to an energy-efficient variation-tolerant ... more Abstract In this paper, we present a unified approach to an energy-efficient variation-tolerant design of Discrete Wavelet Transform (DWT) in the context of image processing appli-cations. It is to be noted that it is not necessary to produce exactly correct numerical ...
International Symposium on Low Power Electronics and Design, 2011
... and Computer Engineering, Purdue University, West Lafayette, IN 47907, USA Email: {gupta64,dm... more ... and Computer Engineering, Purdue University, West Lafayette, IN 47907, USA Email: {gupta64,dmohapat,sppark,raghunathan,kaushik}@purdue.edu ... REFERENCES [1] R. Hegde and N. Shanbhag, Energy-efficient signal processing via algo-rithmic noise-tolerance, in Proc. ...
IEEE Transactions on Computer-Aided Design of Integrated Circuits and Systems, 2000
ABSTRACT Low power is an imperative requirement for portable multimedia devices employing various... more ABSTRACT Low power is an imperative requirement for portable multimedia devices employing various signal processing algorithms and architectures. In most multimedia applications, human beings can gather useful information from slightly erroneous outputs. Therefore, we do not need to produce exactly correct numerical outputs. Previous research in this context exploits error resiliency primarily through voltage overscaling, utilizing algorithmic and architectural techniques to mitigate the resulting errors. In this paper, we propose logic complexity reduction at the transistor level as an alternative approach to take advantage of the relaxation of numerical accuracy. We demonstrate this concept by proposing various imprecise or approximate full adder cells with reduced complexity at the transistor level, and utilize them to design approximate multi-bit adders. In addition to the inherent reduction in switched capacitance, our techniques result in significantly shorter critical paths, enabling voltage scaling. We design architectures for video and image compression algorithms using the proposed approximate arithmetic units and evaluate them to demonstrate the efficacy of our approach. We also derive simple mathematical models for error and power consumption of these approximate adders. Furthermore, we demonstrate the utility of these approximate adders in two digital signal processing architectures (discrete cosine transform and finite impulse response filter) with specific quality constraints. Simulation results indicate up to 69% power savings using the proposed approximate adders, when compared to existing implementations using accurate adders.
Abstract In this paper, we propose a design paradigm for energy efficient and variation-aware ope... more Abstract In this paper, we propose a design paradigm for energy efficient and variation-aware operation of next-generation multicore heterogeneous platforms. The main idea behind the proposed approach lies on the observation that not all operations are equally important in shaping the output quality of various applications and of the overall system. Based on such an observation, we suggest that all levels of the software design stack, including the programming model, compiler, operating system (OS) and run-time system ...
2014 Fourth International Conference on Advanced Computing & Communication Technologies, 2014
IEEE802.11 wireless networks have become one of the most widely used networks as users can connec... more IEEE802.11 wireless networks have become one of the most widely used networks as users can connect and access the required information anytime and anywhere. Due to open nature of wireless medium, there are many security issues associated with them. In the present work an experimental analysis to study the impact of transmission power of access point on the performance of secure wireless network is analysed in terms of throughput in roaming scenarios for IEEE802.11n WLAN standard. Three power levels high, medium and low have been considered for access point. Analysis has been done in terms of network through put. From the obtained numerical values, it is found that the security performance of transmission power IEEE802.11 LAN slightly changes on varying the transmit power from high level to medium level for both UDP and TCP traffic but on varying the power from medium to low level, the network throughput performance for UDP and TCP traffic is decreased by 3% and 10% respectively.
Recent Patents on Inflammation & Allergy Drug Discovery, 2013
All organisms are protected by their immune system but occasionally this system overreacts leadin... more All organisms are protected by their immune system but occasionally this system overreacts leading to allergic and inflammatory reactions in the body. These reactions are the starting points of various diseases like asthma, eczema and urticaria etc. They involve activation of T cells, release of histamines, toxic chemicals from mast cells and eosinophils respectively. Several chemically and naturally synthesized therapeutic agents are available for the treatment of these immunological diseases. The present review provides a detailed account of mechanism of allergic and inflammatory reactions, its types and various treatment strategies with a special focus on some recent patents in this field.
ABSTRACT Distributed Generation (DG) is growing rapidly in power systems due to their potential s... more ABSTRACT Distributed Generation (DG) is growing rapidly in power systems due to their potential solution for issues, like the deregulation in power system, to meet the power demand and the shortage of transmission capacities. Optimal placement of DG assumes significance that improper allocation of DG sources in power system would not only lead to increased power or energy losses, but can also jeopardize the system operation. Also optimal placement of DG is necessary for the maximization of reliability and stability in power system. In this paper classical grid search algorithm based on successive load flows has been employed to obtain optimal location and size of multiple DG units in radial power system network in order to minimize total active power losses and to improve voltage profile of the system. The proposed method is the extension of single DG placement to the placement of multiple DG units. It is significant because of the fact that with the integration of DG units at various locations, there is more reduction in total power losses and maximum voltage drop in the system is also decreased. The proposed method is tested on 12-bus radial distribution feeder with different sizes of DG source. The obtained results are presented in graphical manner.
IEEE/ACM International Symposium on Low Power Electronics and Design, 2011
... and Computer Engineering, Purdue University, West Lafayette, IN 47907, USA Email: {gupta64,dm... more ... and Computer Engineering, Purdue University, West Lafayette, IN 47907, USA Email: {gupta64,dmohapat,sppark,raghunathan,kaushik}@purdue.edu ... REFERENCES [1] R. Hegde and N. Shanbhag, Energy-efficient signal processing via algo-rithmic noise-tolerance, in Proc. ...
2010 IEEE International Conference on Computer Design, 2010
Abstract In this paper, we present a unified approach to an energy-efficient variation-tolerant ... more Abstract In this paper, we present a unified approach to an energy-efficient variation-tolerant design of Discrete Wavelet Transform (DWT) in the context of image processing appli-cations. It is to be noted that it is not necessary to produce exactly correct numerical ...
Abstract In this paper, we present a unified approach to an energy-efficient variation-tolerant ... more Abstract In this paper, we present a unified approach to an energy-efficient variation-tolerant design of Discrete Wavelet Transform (DWT) in the context of image processing appli-cations. It is to be noted that it is not necessary to produce exactly correct numerical ...
International Symposium on Low Power Electronics and Design, 2011
... and Computer Engineering, Purdue University, West Lafayette, IN 47907, USA Email: {gupta64,dm... more ... and Computer Engineering, Purdue University, West Lafayette, IN 47907, USA Email: {gupta64,dmohapat,sppark,raghunathan,kaushik}@purdue.edu ... REFERENCES [1] R. Hegde and N. Shanbhag, Energy-efficient signal processing via algo-rithmic noise-tolerance, in Proc. ...
IEEE Transactions on Computer-Aided Design of Integrated Circuits and Systems, 2000
ABSTRACT Low power is an imperative requirement for portable multimedia devices employing various... more ABSTRACT Low power is an imperative requirement for portable multimedia devices employing various signal processing algorithms and architectures. In most multimedia applications, human beings can gather useful information from slightly erroneous outputs. Therefore, we do not need to produce exactly correct numerical outputs. Previous research in this context exploits error resiliency primarily through voltage overscaling, utilizing algorithmic and architectural techniques to mitigate the resulting errors. In this paper, we propose logic complexity reduction at the transistor level as an alternative approach to take advantage of the relaxation of numerical accuracy. We demonstrate this concept by proposing various imprecise or approximate full adder cells with reduced complexity at the transistor level, and utilize them to design approximate multi-bit adders. In addition to the inherent reduction in switched capacitance, our techniques result in significantly shorter critical paths, enabling voltage scaling. We design architectures for video and image compression algorithms using the proposed approximate arithmetic units and evaluate them to demonstrate the efficacy of our approach. We also derive simple mathematical models for error and power consumption of these approximate adders. Furthermore, we demonstrate the utility of these approximate adders in two digital signal processing architectures (discrete cosine transform and finite impulse response filter) with specific quality constraints. Simulation results indicate up to 69% power savings using the proposed approximate adders, when compared to existing implementations using accurate adders.
Abstract In this paper, we propose a design paradigm for energy efficient and variation-aware ope... more Abstract In this paper, we propose a design paradigm for energy efficient and variation-aware operation of next-generation multicore heterogeneous platforms. The main idea behind the proposed approach lies on the observation that not all operations are equally important in shaping the output quality of various applications and of the overall system. Based on such an observation, we suggest that all levels of the software design stack, including the programming model, compiler, operating system (OS) and run-time system ...
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Papers by Vaibhav Gupta