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Development of optimal routing service for emergency scenarios using pgRouting and FOSS4G
Sittichai Choosumrong,Chingchai Humhong,Venkatesh Raghavan,Ge´rald Fenoy 대한공간정보학회 2019 Spatial Information Research Vol.27 No.4
This study aims to implement a system for Emergency Routing Decision Planning (ERDP) based on Service Oriented Architecture. A Web-based system is implemented to facilitate ubiquitous dynamic routing services on up-to-date road network data. Integration of Dijkstra’s shortest path and Analytic Hierarchy Process (AHP) algorithms has facilitated improved weighted travel- time computation. Route computations are done considering situation at source, transit and destinations. The AHP is used to prioritize amongst possible destinations considering impedance factors affecting travel time. The routing algorithm is deployed as Web Processing Service (WPS) using the ZOO-Project Platform. Two scenarios for application of the ERDP Web services are demonstrated. In the first scenario of medical emergency, the ERDP computes routes between patient’s location, emergency car to hospital in proximity of accident site considering dynamic factors such as conditions of road network, the patient’s state and availability of medical facilities and expertise in the target hospital. In the second scenario of a disaster situation, the GRASS GIS r.sim.water simulation model for overland flow under excess rainfall conditions was integrated into the ERDP system as a WPS. The result of the simulation is used to automatically update the road network database and new routes are computed based on existing conditions. The system is developed using Free and Open Source Software for Geoinformatics (FOSS4G) stack and is amenable to customization to support other emergencies such as fire, debris flow and tsunami. Integration with Sensor Observation Services for automatic data updates from CCTV camera and weather stations could further improve utility as a real-time ERDP system.
Nd-Doped SnO<sub>2</sub> and ZnO for Application in Cu(InGa)Se<sub>2</sub> Solar Cells
Park, Hyeonwook,Alhammadi, Salh,Bouras, Karima,Schmerber, Guy,Ferblantier, Gé,rald,Dinia, Aziz,Slaoui, Abdelilah,Jeon, Chan-Wook,Park, Chinho,Kim, Woo Kyoung American Scientific Publishers 2017 Science Of Advanced Materials Vol.9 No.12
Quantum Interference Channeling at Graphene Edges
Yang, Heejun,Mayne, Andrew J.,Boucherit, Mohamed,Comtet, Geneviè,ve,Dujardin, Gé,rald,Kuk, Young American Chemical Society 2010 NANO LETTERS Vol.10 No.3
<P>Electron scattering at graphene edges is expected to make a crucial contribution to the electron transport in graphene nanodevices by producing quantum interferences. Atomic-scale scanning tunneling microscopy (STM) topographies of different edge structures of monolayer graphene show that the localization of the electronic density of states along the C−C bonds, a property unique to monolayer graphene, results in quantum interference patterns along the graphene carbon bond network, whose shapes depend only on the edge structure and not on the electron energy.</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/nalefd/2010/nalefd.2010.10.issue-3/nl9038778/production/images/medium/nl-2009-038778_0005.gif'></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/nl9038778'>ACS Electronic Supporting Info</A></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/nl9038778'>ACS Electronic Supporting Info</A></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/nl9038778'>ACS Electronic Supporting Info</A></P>
Marek Lewandowski,Maria Bartoszewicz,Karolina Jaroszewska,Gérald Djéga-Mariadassou 한국공업화학회 2022 Journal of Industrial and Engineering Chemistry Vol.116 No.-
This review gives a brief presentation of the types, structure, synthesis, and application of amorphoustransition metal borides (Mt-B) in particular the bulk or supported nickel and cobalt borides (NiB andCoB). Mt-B materials are amorphous metal-metalloid alloys and constitute an important group of catalyticsystems due to their special chemical and physical properties, including broad composition, structuralhomogeneity, and high concentration of coordination unsaturated sites. These features along withthe relatively cheap and simple methods of synthesis make them interesting alternative catalytic materialsfor numerous new, cost-effective, and environmentally sustainable yields and applications. Muchattention has been paid to Mt-B as an interesting alternative to the industrially applied catalysts basedon expensive and/or susceptible to sulphur poisoning, precious metals, and Raney nickel. Therefore, thisreview presents the application of Mt-B in different sectors: chemical production, energy storage/conversion,and environmental remediation. The current and future directions of research in this area areanalysed.
Al-doped zinc stannate films for photovoltaic applications
정현민,박영상,Sreedevi Gedi,Vasudeva Reddy Minnam Reddy,Gérald Ferblantier,김우경 한국화학공학회 2020 Korean Journal of Chemical Engineering Vol.37 No.4
Al-doped zinc stannate (Zn2SnO4 : Al or Zn-Sn-O: Al or AZTO) has attracted considerable attention as a next-generation transparent conducting oxide (TCO) owing to its properties. In this study, AZTO films were deposited by co-sputtering Al-doped zinc oxide (AZO) and SnO2 targets at room temperature. The as-deposited AZTO films were confirmed to be satisfactorily adherent with good uniformity. These films had an average transmittance of over 80%, energy band gap of >3.5 eV, and relatively low electrical resistivity of 1.29×101 cm. The composition ratio of Zn/Sn at 140 W of SnO2 power was approximately 2, indicating the formation of AZTO film with stoichiometric composition of Zn2SnO4 : Al at this power. Further, the Cu(InGa)Se2 (CIGS) device fabricated with AZTO (140W) as a TCO exhibited an efficiency of 0.73%, with a VOC of 0.51V, JSC of 3.76 mA/cm2, and FF of 38.4%. Furthermore, the conversion efficiency of CIGS cell was enhanced to 2.82% by employing the AZTO film deposited at the elevated temperature of 350 oC.