http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Sangsu Park 한국방사성폐기물학회 2022 한국방사성폐기물학회 학술논문요약집 Vol.20 No.1
The natural barrier, a component of the deep disposal system, has site-specific characteristics depending on the site of the repository, and is one of the main considerations for long-term safety evaluation after closure along with the engineered barrier among the multiple barrier systems of the repository. The natural barrier is defined in Korea as the natural underground and surface structures that can restrict the exposure of radioactive waste, human intrusion or groundwater infiltration into a disposal facility, and the transfer of radionuclides. It includes bedrocks and soils surrounding the engineered barriers of radioactive wastes [Notice of the NSSC, No. 2020021]. This study analyzed foreign regulatory requirements related to natural barriers, requirements for natural barrier and performance target of Sweden and Finland (safety functions and target characteristics of natural barriers, e.g. natural barrier composition, geological characteristics, hydrogeological characteristics). Overseas regulations and cases referenced to derive regulations of general safety requirements on natural barrier are IAEA SSG-14, SSMFS 2008:21 in Sweden, STUK/Y/4/2018 in Finland, and POSIVA SKB Report 01, a joint report between POSIVA and SKB. The repository site and repository depth should be chosen so that the geological formation provides adequately stable and favorable conditions to ensure that the repository barriers perform as intended over a sufficient period of time. The conditions intended primarily concern temperature- related, hydrological, mechanical (for example, rock mechanics and seismology) and chemical (geochemistry, including groundwater chemistry) factors. Furthermore, the repository site should be located at a secure distance from natural resources exploited today or which may be exploited in the future [SSMFS 2008:21]. Finland regulations also suggests similar requirements [STUK Y-4-2018]. According to the above regulations, POSIVA SKB report 01 mentions both the host rock and the underground opening as natural barriers and requires a safety function, and the main safety functions of the host rock and underground opening are as follows: (1) Isolation from the surface environment; (2) Favorable thermal conditions; (3) Mechanically stable conditions; (4) Chemically favorable conditions; and (5) Favorable hydrogeological conditions with limited transport of solutes. Such safety functions would provide insight for understanding of the natural barrier of deep geological disposal system.
Sangsu Park,Jungho Shin,Cimino, S.,Seungjae Jung,Joonmyoung Lee,Seonghyun Kim,Jubong Park,Wootae Lee,Myungwoo Son,Byunghun Lee,Pantisano, L.,Hyunsang Hwang IEEE 2011 IEEE electron device letters Vol.32 No.12
<P>We proposed a Mo/SiO<SUB>x</SUB>/Pt resistive random access memory (RRAM) device as an alternative to static random access memory (SRAM) devices for field-programmable gate array (FPGA) applications. In order to evaluate the feasibility of our RRAM device for FPGA applications, we utilized an RRAM device + inverter structure and confirmed its successful operation under various operational schemes, multilevel operation by controlling bias condition, and immunity against read disturbance and a retention test at high temperature. From the nonvolatile and reliable characteristics of our RRAM device, unlike that of SRAM devices, it holds promise to enable reconfigurable logic applications with significantly reduced logic-gate density and power consumption.</P>
Nanoscale RRAM-based synaptic electronics: toward a neuromorphic computing device
Park, Sangsu,Noh, Jinwoo,Choo, Myung-lae,Sheri, Ahmad Muqeem,Chang, Man,Kim, Young-Bae,Kim, Chang Jung,Jeon, Moongu,Lee, Byung-Geun,Lee, Byoung Hun,Hwang, Hyunsang IOP Pub 2013 Nanotechnology Vol.24 No.38
<P>Efforts to develop scalable learning algorithms for implementation of networks of spiking neurons in silicon have been hindered by the considerable footprints of learning circuits, which grow as the number of synapses increases. Recent developments in nanotechnologies provide an extremely compact device with low-power consumption.</P><P>In particular, nanoscale resistive switching devices (resistive random-access memory (RRAM)) are regarded as a promising solution for implementation of biological synapses due to their nanoscale dimensions, capacity to store multiple bits and the low energy required to operate distinct states. In this paper, we report the fabrication, modeling and implementation of nanoscale RRAM with multi-level storage capability for an electronic synapse device. In addition, we first experimentally demonstrate the learning capabilities and predictable performance by a neuromorphic circuit composed of a nanoscale 1 kbit RRAM cross-point array of synapses and complementary metal–oxide–semiconductor neuron circuits. These developments open up possibilities for the development of ubiquitous ultra-dense, ultra-low-power cognitive computers.</P>
Self-formed Schottky barrier induced selector-less RRAM for cross-point memory applications
Park, Sangsu,Jung, Seungjae,Siddik, Manzar,Jo, Minseok,Park, Jubong,Kim, Seonghyun,Lee, Wootae,Shin, Jungho,Lee, Daeseok,Choi, Godeuni,Woo, Jiyong,Cha, Euijun,Lee, Byoung Hun,Hwang, Hyunsang Wiley (John WileySons) 2012 Physica Status Solidi. Rapid Research Letters Vol.6 No.11
Memristive switching behavior in Pr0.7Ca0.3MnO3 by incorporating an oxygen-deficient layer
Park, Sangsu,Jung, Seungjae,Siddik, Manzar,Jo, Minseok,Lee, Joonmyoung,Park, Jubong,Lee, Wootae,Kim, Seonghyun,Sadaf, Sharif Md.,Liu, Xinjun,Hwang, Hyunsang Wiley (John WileySons) 2011 Physica status solidi. PSS-RRL. Rapid Research Let Vol.5 No.10
박상수(Sangsu Park),고종민(Jongmin Ko),이운성(Woon-Sung Lee) 한국자동차공학회 2009 한국자동차공학회 학술대회 및 전시회 Vol.2009 No.11
Recently, development of advanced driver assistance system using cameras, radar sensors is being performed. In this paper, we developed driver assistance system which recognizes lane and vehicle using camera and helps driver being more safer. This paper describes our effort to add a Lighting-Adaptive vision system to the safe driving management system for performance enhancement. The safe driving management system monitors driver behavior, detects dangerous driving situations, and manages driving data effectively. A low-cost CCD camera was placed in the windshield of cabin. An image processing algorithm was developed to detect lanes and vehicles by a real test vehicle environment. This paper add the algorithm, it can control of recognition threshold value because of road and vehicle depends on the brightness of road.