177,107 research outputs found
Autonomic Power Management in Speculative Simulation Runtime Environments
No full textWhile transitioning to exascale systems, it has become clear that power management plays a fundamental role to support a viable utilization of the underlying hardware, also performance-wise. To meet power restrictions imposed by future exascale supercomputers, runtime environments will be required to enforce self-tuning schemes to run dynamic workloads under an imposed power cap. Literature results show that, for a wide class of multi-threaded
applications, tuning both the degree of parallelism and frequency/voltage of cores allows a more effective use of the budget, compared to techniques that use only one of these mechanisms in isolation. In this paper, we explore the issues associated with applying these techniques on speculative Time-Warp based simulation runtime environments. We discuss how the differences in two antithetical Time Warp-based simulation environments impact the obtained results. Our assessment confirms that the performance gains achieved through a proper allocation of the power budget can be significant. We also identify the research challenges that would make these form of self-tuning more broadly applicable
Methanol Vapours Recognised by SPR Technique of Self-assembled Dipyrromethane Thin Film Characterised by SERS
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Structural study of meso-octaethylcalix[4]pyrrole Langmuir-Blodgett films used as gas sensors
No full textMeso-Octaethyl-Porphyrinogen LB Films in Molecular Recognition of Alcohol Vapours by Surface Plasmon Resonance
No full textPorphyrinogen Pyrrole Macrocyclic Derivative Thin Layer for Optical Transduction Gas Sensors of Alcohol Vapours
No full textThin films of meso-octaethylporphyrinogen with different thickness were deposited on suitable substrates by Langmuir-Blodgett deposition technique in order to realize optical-sensitive active layers using Surface Plasmon Resonance (SPR) technique as transduction methodology. Analysis of the morphology of the sensing layers was performed by Atomic Force Microscopy. In particular, such coatings were tested for the detection of alcohol vapors such as ethanol, methanol and isopropanol. This
resulted in a reversible shift in the resonance depth and angular position of the SPR curves, depending on the interactions between the sensing layers and the alcohol vapor molecules. Different sensitivity and rate of response for different alcohol molecules were found and analyzed. Measurements of the sensing
response towards successive expositions of the sensing layers to methanol, ethanol and isopropanol vapors were performed in order to analyze the discrimination properties of the active layers towards the analytes
A SERS study of seld-assembled (4-methylthio)benzaldehyde thin films: a base monolayer for organic derivations on inorganic surfaces
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