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Nanoscale Simulation of Three-Contact Graphene Ballistic Junctions

Davide Mencarelli, Luca Pierantoni, Tullio Rozzi, Fabio Coccetti
2014 Nanomaterials and Nanotechnology  
The ballisticity and the scattering properties of the junction contribute to the nonlinear behaviour, as, in fact, a sinusoidal voltage between two GNR branches results in a non-sinusoidal current at the  ...  In this work, three-terminal ballistic junctions, made of three-branch graphene nanoribbons (GNRs), are considered and simulated at the nanometric scale.  ...  In particular, the central branch of a Y-shaped device is found to be at non-zero voltage when the other two branches are subjected to voltages of opposite sign.  ... 
doi:10.5772/58547 fatcat:ibpka6bd6bdt3b5uxl7guk2cfm

Distributed real-time dynamic security assessment using intelligent techniques

Karthik Kumar, Theodoros Kyriakidis, Maher Kayal, Rachid Cherkaoui
2013 2013 IEEE Innovative Smart Grid Technologies-Asia (ISGT Asia)  
Loss of synchronization has a direct effect on the stability of power generators.  ...  In real time scenario, transmission (of power) in power systems may not be always ideal i.e. they may be interrupted. As a result, the synchronization among the power generating modules may be lost.  ...  The stability status of the power generating unit at each bus is predicted by processing the trajectories of variables of interest, using intelligent techniques.  ... 
doi:10.1109/isgt-asia.2013.6698784 fatcat:5hopq5uxxnbyrhqhowbjkzknkq

Electrical breakdown detection system for dielectric elastomer actuators

Michele Ghilardi, James J. C. Busfield, Federico Carpi, Yoseph Bar-Cohen
2017 Electroactive Polymer Actuators and Devices (EAPAD) 2017  
This paper presents preliminary tests of the detection system in different scenarios in order to assess its reliability.  ...  Here a simple solution for a portable detection system is reported that is based on a voltage-divider configuration that detects the voltage drop at the DEA terminals and assesses the occurrence of breakdown  ...  While there have been studies on predicting the occurrence of breakdown in DEAs [8] , there is still a clear need for reliable, simple, portable and cost-effective detection systems able to acknowledge  ... 
doi:10.1117/12.2258617 fatcat:3rlfst7zljfh7mlkghz6e3374m

Decision Tree-Based Online Voltage Security Assessment Using PMU Measurements

Ruisheng Diao, Kai Sun, V. Vittal, R.J. O'Keefe, M.R. Richardson, N. Bhatt, D. Stradford, S.K. Sarawgi
2009 IEEE Transactions on Power Systems  
Timely and accurate assessment of voltage security is necessary to detect post-contingency voltage problems in order to prevent a large scale blackout.  ...  The associated synchronized critical attributes are obtained in real time from phasor measurement units (PMUs) and compared with the offline thresholds determined by the DTs to assess security.  ...  In such situations, the loss of critical transmission lines or transformers may cause a continuous decline of bus voltages and result in a voltage collapse if the system lacks effective reactive power  ... 
doi:10.1109/tpwrs.2009.2016528 fatcat:vpadlfwfazc3llydntxiowakjm

Development of Time- and Voltage-Domain Mapping (V-T-Mapping) to Localize Ventricular Tachycardia Channels During Sinus Rhythm

Sachin Nayyar, Pawel Kuklik, Anand N. Ganesan, Thomas R. Sullivan, Lauren Wilson, Glenn D. Young, Prashanthan Sanders, Kurt C. Roberts-Thomson
2016 Circulation: Arrhythmia and Electrophysiology  
of their longer protected length and relative lack of side-branching.  ...  Predictive performances of these properties to detect VT channels were tested. In the application stage (7 patients and 20 VTs), these properties were prospectively tested to guide catheter ablation.  ...  Sources of Funding  ... 
doi:10.1161/circep.116.004050 pmid:27913399 fatcat:5qyc4squubg7xi5k4cn2fluacq

Operational security at high penetrations of stochastic, non-synchronous generation

Padraig Daly, Michael Power, Andrew Keane, Damian Flynn
2013 2013 48th International Universities' Power Engineering Conference (UPEC)  
This paper presents an outline of the operational challenges arising from stochastic, non-synchronous generation, as well as the tools which can be used to cost-effectively enhance operational security  ...  Index Terms-Security-constrained optimal power flow, security-constrained unit commitment, wind power generation.  ...  It can be seen that considering the loss of each branch of the network in the UC formulation has an impact on the active power output level of generating units.  ... 
doi:10.1109/upec.2013.6714960 fatcat:gfpgylde3vh7desxwtox5wcdee

Low kV settings CT angiography (CTA) with low dose contrast medium volume protocol in the assessment of thoracic and abdominal aorta disease: a feasibility study

D Ippolito, C Talei Franzesi, D Fior, P A Bonaffini, O Minutolo, S Sironi
2015 British Journal of Radiology  
Low kV settings CT angiography (CTA) with low dose contrast medium volume protocol in the assessment of thoracic and abdominal aorta disease: a feasibility study. Br J Radiol 2015;88:20140140.  ...  Exploiting the higher X-ray attenuation at low Full paper: Low dose CT-angiography in assessment of thoracic and abdominal aorta BJR voltage of iodine-based CM, we also reduced the CM volume administered  ...  Thoracic aorta In the thoracic aorta examination, the two readers obtained similar density measurements in terms of Hounsfield units at the four different levels evaluated, both in the low tube voltage  ... 
doi:10.1259/bjr.20140140 pmid:25784185 pmcid:PMC4628465 fatcat:fcpnpvathfhfbjfjg4dnugtvkm

Protection assessment in electrical distribution grids based on state estimation

Thomas Offergeld, Moritz Cramer, Felix Glinka, Armin Schnettler
2018 The Journal of Engineering  
The increasing number of inverter interfaced distributed generation units in electrical distribution grids can influence the functionality of protective devices in case of grid faults.  ...  The overall computational effort is reduced using methods of regression analysis while maintaining original accuracy.  ...  Introduction Installation of distributed generation (DGs) units in distribution grids in the wake of the German 'Energiewende' leads to challenges in grid operation and planning for undisturbed operation  ... 
doi:10.1049/joe.2018.0159 fatcat:npim6c52eraojbmrmaicotqtce

Switching between local and global aromaticity in a conjugated macrocycle enables high‐performance organic sodium‐ion battery anodes

Simon Eder, Dong-Joo Yoo, Wojciech Nogala, Matthias Pletzer, Alejandro Santana Bonilla, Andrew J.P. White, Kim E. Jelfs, Martin Heeney, Jang Wook Choi, Florian Glöcklhofer
2020 Angewandte Chemie International Edition  
Aromatic organic compounds can be used as electrode materials in rechargeable batteries and are expected to advance the development of both anode and cathode materials for sodium-ion batteries (SIBs).  ...  However, most aromatic organic compounds assessed as anode materials in SIBs to date exhibit significant degradation issues under fast-charge/discharge conditions and unsatisfying long-term cycling performance  ...  Krzysztof Noworyta (Polish Academy of Sciences) for providing the potentiostat and glovebox for CV in solution.  ... 
doi:10.1002/anie.202003386 pmid:32368821 fatcat:sjbnjlqxgfgxxccwbs3horokye

Transmission System Impact of Wind Energy Harvesting Networks

Paul Cuffe, Paul Smith, Andrew Keane
2012 IEEE Transactions on Sustainable Energy  
This work will examine the effect of increasing penetration of wind generators on transmission system voltage levels and voltage security.  ...  High penetrations levels of such generation will displace synchronous plant and may cause a challenging scarcity of ancillary service providers, notably in the area of reactive power provision.  ...  ACKNOWLEDGEMENTS The authors acknowledge the contribution of Aonghus Shortt to the unit commitment portion of this work. The cooperation of ESB Networks and Eirgrid is also acknowledged.  ... 
doi:10.1109/tste.2012.2199342 fatcat:k4x7qi4pjje3jhijofqjuly3tm

Transmission System Impact of Wind Energy Harvesting Networks

Paul Cuffe, Andrew Keane, Paul Smith
2017 Figshare  
This work will examine the effect of increasing penetration of wind generators on transmission system voltage levels and voltage security.  ...  High penetration levels of such generation will displace synchronous plant and may cause a challenging scarcity of ancillary service providers, notably in the area of reactive power provision.  ...  ACKNOWLEDGEMENTS The authors acknowledge the contribution of Aonghus Shortt to the unit commitment portion of this work. The cooperation of ESB Networks and Eirgrid is also acknowledged.  ... 
doi:10.6084/m9.figshare.5545717.v1 fatcat:hkadxl7dqvdo3g2ajdt2x2gzke

Combining compiler and runtime IPC predictions to reduce energy in next generation architectures

Saurabh Chheda, Osman Unsal, Israel Koren, C. Mani Krishna, Csaba Andras Moritz
2004 Proceedings of the first conference on computing frontiers on Computing frontiers - CF'04  
To achieve energy reduction, we use IPC information at various granularities, to adaptively adjust voltage and speed, and to throttle the fetch rate in response to changes in ILP.  ...  One of the trends we expect is more extensive utilization of compiler information directly targeting energy optimizations.  ...  By fetch-throttling at times of low-ILP, the branch prediction can be more effective.  ... 
doi:10.1145/977091.977125 dblp:conf/cf/ChhedaUKKM04 fatcat:uvtrfe22hfe6pkkjg5tmzgtuiq

Ionic shortcut currents via manifolds in reverse electrodialysis stacks

A. Culcasi, L. Gurreri, A. Zaffora, A. Cosenza, A. Tamburini, A. Cipollina, G. Micale
2020 Desalination  
Results showed that shortcut currents can play a crucial role in stacks with a large number of cell pairs when the electrical resistance of the parasitic pathways is relatively low, e.g. configurations  ...  Thus, electric energy is supplied to an external load, which is the final user. Net spacers or membrane profiles create the channels for the passage of the electrolyte solutions in ED/RED units.  ...  Acknowledgements This work was performed in the framework of the BAoBaB project (Blue Acid/Base Battery: Storage and recovery of renewable electrical energy by reversible salt water dissociation) and the  ... 
doi:10.1016/j.desal.2020.114450 fatcat:v6l2j6apkrhh5cb7xcova4dfey

The dynamics of somatic input processing in spinal motoneurons in vivo

Cassie S. Mitchell, Robert H. Lee
2011 Journal of Neurophysiology  
The dynamics of somatic input processing in spinal motoneurons in vivo.  ...  To assess this effect, we normalized changes in G with respect to extent of depolarization, thereby calculating ⌬G/⌬V (a measure of the curvature in the current-voltage relationship).  ...  Assessment of threshold voltage. The voltage range of primary interest in this study is subthreshold through just suprathreshold.  ... 
doi:10.1152/jn.00592.2010 pmid:21191091 pmcid:PMC3074425 fatcat:htj5kog76jc2xh2cnhjq7vmr7u

Estimating national and local low-voltage grid capacity for residential solar photovoltaic in Sweden, UK and Germany

Elias Hartvigsson, Mikael Odenberger, Peiyuan Chen, Emil Nyholm
2021 Renewable Energy  
The model is applied to Sweden, Germany and the UK and shows that low-voltage grid capacity for residential solar photovoltaic is very large, 33 (þ5/-7) GW (Sweden), 248 (þ5/-24) GW (Germany) and 63 (þ1  ...  Yet, knowledge of national solar photovoltaic grid capacity is central in order to formulate realistic solar PV targets and strategies.  ...  Acknowledgements The authors would like to thank Professor Per Norberg for discussions on grid design. E.H thanks the Area of Advance Energy at Chalmers for providing financial support.  ... 
doi:10.1016/j.renene.2021.02.073 fatcat:ej34l2l6nbcw7gs523typ5z3b4
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