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LETHOR: a thermal-aware proactive routing algorithm for 3D NoCs with less entrance to hot regions
, Article Journal of Supercomputing ; Volume 78, Issue 6 , 2022 ; 09208542 (ISSN) ; Shirmohammadi, Z ; Rohbani, N ; Farbeh, H ; Sharif University of Technology
Springer
2022
Abstract
Although many Dynamic Thermal Management (DTM) techniques are employed to overcome thermal problems in 3D NoCs, none of them consider temperature information of all nodes of a layer at the same time, so that they cannot reduce the temperature of the network properly.To overcome this problem, this paper proposes an efficient proactive thermal-aware routing algorithm, called Less Entrance to Hot Regions (LETHOR), to keep the NoC temperature lower than a predefined thermal limit. LETHOR routes the network packets based on the temperature information of all nodes in the layers instead of considering only the neighbor nodes in each hop. To this aim, LETHOR introduces a Hot Region in each layer...
Higgs-mode signature in ultrafast electron dynamics in superconducting graphene
, Article Physical Review B ; Volume 104, Issue 17 , 2021 ; 24699950 (ISSN) ; Goudarzi, H ; Khezerlou, M ; Jafari, S. A ; Sharif University of Technology
American Physical Society
2021
Abstract
We theoretically investigate the effect of superconductivity on the ultrafast electron dynamics in graphene interacting with an ultrashort linearly polarized optical pulse. The optical pulse, with frequency greater than 1 THz, quadratically couples to the Higgs (amplitude) mode and therefore can excite the Higgs-mode oscillations in superconductors, leading to quenching superconducting excitation energy, even in s-wave pairing symmetry. Since the duration of the used pulse is less than the electron scattering time in graphene (10-100 fs), the electron dynamics driven by the electric field of pulse remains coherent and is described within the tight-binding model of graphene. We show that the...
One-dimensional Conduction-based Modeling of Bioenergy Production in a Microbial Fuel Cell Engaged with Multi-population Biocatalysts
, Article Electrochimica Acta ; Volume 184 , December , 2015 , Pages 151-163 ; 00134686 (ISSN) ; Mardanpour, M. M ; Yaghmaei, S ; Sharif University of Technology
Elsevier Ltd
2015
Abstract
Anaerobic digestion processes and the conductive electron transfer approach were used to describe the bioenergy production processes in a microbial fuel cell (MFC), respectively. The present model is a far more completed form of conduction-based modeling which is able to predict performance of an MFC fed with complex substrates and inoculated with multi-population culture. One-dimensional spatial distributions of the different microorganisms, as biocatalysts of processes and intermediates produced in the different steps of the anaerobic digestion processes in the biofilm, as well as the dynamic behavior of the anolyte including syntropic interactions among different groups of microorganisms...
Investigation of intense femto-second laser ionization and dissociation of methane with time-dependent density-functional approach
, Article Chemical Physics Letters ; Vol. 604 , 2014 , Pages 60-67 ; ISSN: 00092614 ; Sadighi Bonabi, R ; Anvari, A ; Sharif University of Technology
Abstract
Three dimensional calculations of electronic dynamics of CH4 in a strong laser field are presented with time-dependent density-functional theory. Time evolution of dipole moment and electron localization function is presented. The dependence of dissociation rate on the laser characters is shown and optimal effective parameters are evaluated. The optimum field leads to 76% dissociation probability for Gaussian envelope and 40 fs (FWHM) at 10 16 W cm-2. The dissociation probability is calculated by optimum convolution of dual short pulses. By combining of field assisted dissociation process and Ehrenfest molecular dynamics, time variation of bond length, velocity and orientation effect are...