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Kim, Hyun-Kyung,Bak, Seong-Min,Lee, Suk Woo,Kim, Myeong-Seong,Park, Byeongho,Lee, Su Chan,Choi, Yeon Jun,Jun, Seong Chan,Han, Joong Tark,Nam, Kyung-Wan,Chung, Kyung Yoon,Wang, Jian,Zhou, Jigang,Yang, Royal Society of Chemistry 2016 ENERGY AND ENVIRONMENTAL SCIENCE Vol.9 No.4
<P>Graphene nanomeshes (GNMs) with nanoscale periodic or quasi-periodic nanoholes have attracted considerable interest because of unique features such as their open energy band gap, enlarged specific surface area, and high optical transmittance. These features are useful for applications in semiconducting devices, photocatalysis, sensors, and energy-related systems. Here, we report on the facile and scalable preparation of multifunctional micron-scale GNMs with high-density of nanoperforations by catalytic carbon gasification. The catalytic carbon gasification process induces selective decomposition on the graphene adjacent to the metal catalyst, thus forming nanoperforations. The pore size, pore density distribution, and neck size of the GNMs can be controlled by adjusting the size and fraction of the metal oxide on graphene. The fabricated GNM electrodes exhibit superior electrochemical properties for supercapacitor (ultracapacitor) applications, including exceptionally high capacitance (253 F g(-1) at 1 A g(-1)) and high rate capability (212 F g(-1) at 100 A g(-1)) with excellent cycle stability (91% of the initial capacitance after 50000 charge/discharge cycles). Further, the edge-enriched structure of GNMs plays an important role in achieving edge-selected and high-level nitrogen doping.</P>
A Guideline of Computer-based Training Design Considering HCI Principles and Usability Evaluation
Seungwook Lee,Jiyoung Kim,Wongi Hong,Joohyun Jung,Youngwon Choi,Byeongho Bak 대한인간공학회 2015 대한인간공학회 학술대회논문집 Vol.2015 No.10
Objective: The aim of this study is to establish a guidelines of CBT(Computer-Based Training) GUI design considering HCI(Human-Computer Interaction) principles and Usability evaluation components. Background: There are many studies on the GUI(Graphic User Interface) design guidelines such as mobile applications and website; however, lacked of consideration for a specialized field such as the military. Method : A three research was applied in the study. (1) Define HCI Principles, (2) Review of existing CBTs and Web-based training system, (3) Research of Usability evaluation criterion components Results: A guideline of CBT design was consisted of 8 design components, and develop for three screen(log-in/initial/learning) and 4 areas(title/menu/contents/script) in the integrated 12 Usability evaluation components. Conclusion: A guideline of CBT design can be applicable to develop CBT screen design in the integrated usability.