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Towards a centralized route planning solution supporting time dependencies
Carlos t. Calafate,David Soler,Juan-Carlos Cano,Pietro Manzoni 한국산업정보학회 2014 한국산업정보학회 학술대회논문집 Vol.2014 No.1
Future route planning solutions are expected to provide significant Improvements in terms of route traversal times by accounting for both estimated and real-time traffic congestion states. Compared to current solutions, mostly based on static path segment costs, the main challenge is how to obtain reliable traffic congestion estimations for all the streets/avenues in a city for the different times of the day, for every day in a year. Modeling such a tremendous amount of data can be time-consuming and, additionally, centralized computation of optimal routes based on such time-dependencies has very high computational requirements. As a first approach to this problem, we propose a heuristic to reduce the modeling effort to a minimum while maintaing the benefits of time-dependent traffic congestion modeling. The effectiveness of this heuristic is assessed for the city of Valencia, Spain.
홍성주,박민,강호진,이민우,David Soler Delgado,정대홍,박영우,김병훈 한국물리학회 2016 Current Applied Physics Vol.16 No.12
We report hydrogen adsorption on twisted bilayer graphene (tBLG). Raman spectroscopy and the electrical transport properties (electrical resistance and thermoelectric power) confirm the electron doping by hydrogen adsorption, in agreement with the previous report involving exfoliated bilayer graphene (BLG). Common electron doping behaviors were observed at various twist angles (0, 5, 12.5, and 30), and the adsorptions follow the first-order Langmuir-type adsorption model. Specifically, we analyzed the off-state currents, with band-gap openings of around 13 meV in tBLG with twist angle of 0, as in Bernalstacked BLG.