The Experts below are selected from a list of 20217 Experts worldwide ranked by ideXlab platform
Chongmin Wang - One of the best experts on this subject based on the ideXlab platform.
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high temperature Shockwave stabilized single atoms
Nature Nanotechnology, 2019Co-Authors: Zhennan Huang, Lianping Wu, Tangyuan Li, Zhenqian Pang, Miaolun Jiao, Zhiqiang Liang, Yang He, Dylan J Kline, Michael R Zachariah, Chongmin WangAbstract:The stability of single-atom catalysts is critical for their practical applications. Although a high temperature can promote the bond formation between metal atoms and the substrate with an enhanced stability, it often causes atom agglomeration and is incompatible with many temperature-sensitive substrates. Here, we report using controllable high-temperature Shockwaves to synthesize and stabilize single atoms at very high temperatures (1,500–2,000 K), achieved by a periodic on–off heating that features a short on state (55 ms) and a ten-times longer off state. The high temperature provides the activation energy for atom dispersion by forming thermodynamically favourable metal–defect bonds and the off-state critically ensures the overall stability, especially for the substrate. The resultant high-temperature single atoms exhibit a superior thermal stability as durable catalysts. The reported Shockwave method is facile, ultrafast and universal (for example, Pt, Ru and Co single atoms, and carbon, C3N4 and TiO2 substrates), which opens a general route for single-atom manufacturing that is conventionally challenging. A repeated on–off high-temperature Shockwave is shown to be a generalizable way of efficiently synthesizing and stabilizing single atoms at high temperatures.
Thomas Benz - One of the best experts on this subject based on the ideXlab platform.
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Shockwave Suppression by Vehicle-to-Vehicle Communication
Transportation Research Procedia, 2016Co-Authors: Nassim Motamedidehkordi, Martin Margreiter, Thomas BenzAbstract:The rapid development of wireless communication and information technologies has increased research interests in inter-vehicle communication systems and their effect on traffic flow. One of the most complex traffic phenomena on freeways are Shockwaves. Shockwaves are recognized as the sudden, substantial change in the state of the traffic flow, which acts as an active or moving bottleneck. They have significant impact on freeway capacity and safety. For this study, a microscopic traffic simulation was used to determine the extent to which inter-vehicle communication and change in the driving strategy after the recognition of a Shockwave can influence the propagation and dissolving of Shockwaves on freeways. We also briefly introduce the Shockwave theory and our communication algorithm. Then we present the simulation result with different penetration rates of communicative vehicles, which are randomly dispersed in traffic flow, through performance measures for traffic flow with Shockwaves.
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Shockwave Analysis on Motorways and Possibility of Damping by Autonomous Vehicles
Advanced Microsystems for Automotive Applications 2015, 2015Co-Authors: Nassim Motamedidehkordi, Thomas Benz, Martin MargreiterAbstract:Shockwaves are a boundary that shows discontinuity in a flow-density domain. The physical realization of a Shockwave is a point in time and space at which vehicles change their speed abruptly. The formation and dissolving of congestion are phenomena that are important for the traveler information and congestion management perspectives. Shockwave analysis is the method to identify congested areas and estimate the rate of formation and dissipation of the congestion. The microscopic traffic simulation tool Vissim was used to address the main objective of this study, namely to determine if and to what extent the driving behavior parameters of the model used influence the Shockwaves on motorways. After precise calibration of the car following behavior based on the detected Shockwaves from data of the German research project sim TD , the possible influences on driver behavior through highly automated vehicles was sketched in order to figure out whether these applications can change the Shockwave propagation speed on motorways, lead to suppression of Shockwaves and improve the network performance as well as increase the traffic safety.
Biagio Moretti - One of the best experts on this subject based on the ideXlab platform.
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the biological effects of extracorporeal shock wave therapy eswt on tendon tissue
Muscles ligaments and tendons journal, 2012Co-Authors: Angela Notarnicola, Biagio MorettiAbstract:There is currently great interest in the use of Extracorporeal Shock Wave Therapy (ESWT) and in clarifying the mechanisms of action in tendon pathologies. The success rate ranges from 60% to 80% in epicondylitis, plantar fasciitis, cuff tendinitis, trocanteritis, Achilles tendinitis or jumper’s knee. In contrast to urological treatments (lithotripsy), where Shockwaves are used to disintegrate renal stones, in musculoskeletal treatments (orthotripsy), Shockwaves are not being used to disintegrate tissues, but rather to microscopically cause interstitial and extracellular biological responses and tissue regeneration. The researchers are interesting to investigate the biological effects which support the clinical successes. Some authors speculated that Shockwaves relieve pain in insertional tendinopathy by hyper-stimulation analgesia. Many recent studies demonstrated the modulations of Shockwave treatment including neovascularization, differentiation of mesenchymal stem cells and local release of angiogenetic factors. The experimental findings confirm that ESWT decrease the expression of high levels of inflammatory mediators (matrix metalloproteinases and interleukins). Therefore, ESWT produces a regenerative and tissue-repairing effect in musculoskeletal tissues, not merely a mechanical disintegrative effect as generally before assumed. Based on the encouraging results of clinical and experimental studies, the potential of ESWT appears to be emerging. The promising outcome after this non-invasive treatment option in tendinitis care justifies the indication of Shockwave therapy. Further studies have to be performed in order or determine optimum treatment parameters and will bring about an improvement in accordance with evidence-based medicine. Finally, meta-analysis studies are necessary to demonstrate the efficacy and safety of ESWT in treating tendinopathies
Zhennan Huang - One of the best experts on this subject based on the ideXlab platform.
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high temperature Shockwave stabilized single atoms
Nature Nanotechnology, 2019Co-Authors: Zhennan Huang, Lianping Wu, Tangyuan Li, Zhenqian Pang, Miaolun Jiao, Zhiqiang Liang, Yang He, Dylan J Kline, Michael R Zachariah, Chongmin WangAbstract:The stability of single-atom catalysts is critical for their practical applications. Although a high temperature can promote the bond formation between metal atoms and the substrate with an enhanced stability, it often causes atom agglomeration and is incompatible with many temperature-sensitive substrates. Here, we report using controllable high-temperature Shockwaves to synthesize and stabilize single atoms at very high temperatures (1,500–2,000 K), achieved by a periodic on–off heating that features a short on state (55 ms) and a ten-times longer off state. The high temperature provides the activation energy for atom dispersion by forming thermodynamically favourable metal–defect bonds and the off-state critically ensures the overall stability, especially for the substrate. The resultant high-temperature single atoms exhibit a superior thermal stability as durable catalysts. The reported Shockwave method is facile, ultrafast and universal (for example, Pt, Ru and Co single atoms, and carbon, C3N4 and TiO2 substrates), which opens a general route for single-atom manufacturing that is conventionally challenging. A repeated on–off high-temperature Shockwave is shown to be a generalizable way of efficiently synthesizing and stabilizing single atoms at high temperatures.
Nassim Motamedidehkordi - One of the best experts on this subject based on the ideXlab platform.
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Shockwave Suppression by Vehicle-to-Vehicle Communication
Transportation Research Procedia, 2016Co-Authors: Nassim Motamedidehkordi, Martin Margreiter, Thomas BenzAbstract:The rapid development of wireless communication and information technologies has increased research interests in inter-vehicle communication systems and their effect on traffic flow. One of the most complex traffic phenomena on freeways are Shockwaves. Shockwaves are recognized as the sudden, substantial change in the state of the traffic flow, which acts as an active or moving bottleneck. They have significant impact on freeway capacity and safety. For this study, a microscopic traffic simulation was used to determine the extent to which inter-vehicle communication and change in the driving strategy after the recognition of a Shockwave can influence the propagation and dissolving of Shockwaves on freeways. We also briefly introduce the Shockwave theory and our communication algorithm. Then we present the simulation result with different penetration rates of communicative vehicles, which are randomly dispersed in traffic flow, through performance measures for traffic flow with Shockwaves.
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Shockwave Analysis on Motorways and Possibility of Damping by Autonomous Vehicles
Advanced Microsystems for Automotive Applications 2015, 2015Co-Authors: Nassim Motamedidehkordi, Thomas Benz, Martin MargreiterAbstract:Shockwaves are a boundary that shows discontinuity in a flow-density domain. The physical realization of a Shockwave is a point in time and space at which vehicles change their speed abruptly. The formation and dissolving of congestion are phenomena that are important for the traveler information and congestion management perspectives. Shockwave analysis is the method to identify congested areas and estimate the rate of formation and dissipation of the congestion. The microscopic traffic simulation tool Vissim was used to address the main objective of this study, namely to determine if and to what extent the driving behavior parameters of the model used influence the Shockwaves on motorways. After precise calibration of the car following behavior based on the detected Shockwaves from data of the German research project sim TD , the possible influences on driver behavior through highly automated vehicles was sketched in order to figure out whether these applications can change the Shockwave propagation speed on motorways, lead to suppression of Shockwaves and improve the network performance as well as increase the traffic safety.
