The Experts below are selected from a list of 2994 Experts worldwide ranked by ideXlab platform
Arun K Somani - One of the best experts on this subject based on the ideXlab platform.
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Managing Contamination Delay to improve Timing Speculation architectures
2016Co-Authors: Naga Durga Prasad Avirneni, Prem Kumar Ramesh, Arun K SomaniAbstract:Timing Speculation (TS) is a widely known method for realizing better-than-worst-case systems. Aggressive clocking, realizable by TS, enable systems to operate beyond specified safe frequency limits to effectively exploit the data dependent circuit Delay. However, the range of aggressive clocking for performance enhancement under TS is restricted by short paths. In this paper, we show that increasing the lengths of short paths of the circuit increases the effectiveness of TS, leading to performance improvement. Also, we propose an algorithm to efficiently add Delay buffers to selected short paths while keeping down the area penalty. We present our algorithm results for ISCAS-85 suite and show that it is possible to increase the circuit Contamination Delay by up to 30% without affecting the propagation Delay. We also explore the possibility of increasing short path Delays further by relaxing the constraint on propagation Delay and analyze the performance impact.
Naga Durga Prasad Avirneni - One of the best experts on this subject based on the ideXlab platform.
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Managing Contamination Delay to improve Timing Speculation architectures
2016Co-Authors: Naga Durga Prasad Avirneni, Prem Kumar Ramesh, Arun K SomaniAbstract:Timing Speculation (TS) is a widely known method for realizing better-than-worst-case systems. Aggressive clocking, realizable by TS, enable systems to operate beyond specified safe frequency limits to effectively exploit the data dependent circuit Delay. However, the range of aggressive clocking for performance enhancement under TS is restricted by short paths. In this paper, we show that increasing the lengths of short paths of the circuit increases the effectiveness of TS, leading to performance improvement. Also, we propose an algorithm to efficiently add Delay buffers to selected short paths while keeping down the area penalty. We present our algorithm results for ISCAS-85 suite and show that it is possible to increase the circuit Contamination Delay by up to 30% without affecting the propagation Delay. We also explore the possibility of increasing short path Delays further by relaxing the constraint on propagation Delay and analyze the performance impact.
Prem Kumar Ramesh - One of the best experts on this subject based on the ideXlab platform.
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Managing Contamination Delay to improve Timing Speculation architectures
2016Co-Authors: Naga Durga Prasad Avirneni, Prem Kumar Ramesh, Arun K SomaniAbstract:Timing Speculation (TS) is a widely known method for realizing better-than-worst-case systems. Aggressive clocking, realizable by TS, enable systems to operate beyond specified safe frequency limits to effectively exploit the data dependent circuit Delay. However, the range of aggressive clocking for performance enhancement under TS is restricted by short paths. In this paper, we show that increasing the lengths of short paths of the circuit increases the effectiveness of TS, leading to performance improvement. Also, we propose an algorithm to efficiently add Delay buffers to selected short paths while keeping down the area penalty. We present our algorithm results for ISCAS-85 suite and show that it is possible to increase the circuit Contamination Delay by up to 30% without affecting the propagation Delay. We also explore the possibility of increasing short path Delays further by relaxing the constraint on propagation Delay and analyze the performance impact.
B. Normand - One of the best experts on this subject based on the ideXlab platform.
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Quelques aspects hydrologiques des transferts de solutés par infiltration vers les nappes : nitrates et phytosanitaires
La Houille Blanche, 1999Co-Authors: A. Landreau, C. Mouvet, B. NormandAbstract:The Contamination of groundwater by substances, mainly nitrates and pesticides, resulting from agricultural activities depends on three essential factors: - the physical characteristics of the aquifer system: these characteristics play a major role in protecting the groundwater against pollutants (attenuation) and/or in postponing the outbreak of the Contamination (Delay); - the intensity and mode of groundwater recharge: the infiltrating water is the transfer vector of contaminants towards the groundwater; - the quantities of solutes available for infiltration towards the groundwater, i.e. the quantities not retained by the soil/plant/microorganism system. The paper presents some major characteristics of the main types of aquifer in France, notably with regard to pollution vulnerability, and data on the spatial variability and quantitative importance of infiltration, a mechanism that plays a key role in the pollutant concentrations likely to be reached in the groundwater.
A. Landreau - One of the best experts on this subject based on the ideXlab platform.
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Quelques aspects hydrologiques des transferts de solutés par infiltration vers les nappes : nitrates et phytosanitaires
La Houille Blanche, 1999Co-Authors: A. Landreau, C. Mouvet, B. NormandAbstract:The Contamination of groundwater by substances, mainly nitrates and pesticides, resulting from agricultural activities depends on three essential factors: - the physical characteristics of the aquifer system: these characteristics play a major role in protecting the groundwater against pollutants (attenuation) and/or in postponing the outbreak of the Contamination (Delay); - the intensity and mode of groundwater recharge: the infiltrating water is the transfer vector of contaminants towards the groundwater; - the quantities of solutes available for infiltration towards the groundwater, i.e. the quantities not retained by the soil/plant/microorganism system. The paper presents some major characteristics of the main types of aquifer in France, notably with regard to pollution vulnerability, and data on the spatial variability and quantitative importance of infiltration, a mechanism that plays a key role in the pollutant concentrations likely to be reached in the groundwater.