• Title/Summary/Keyword: Safe Space

Search Result 571, Processing Time 0.028 seconds

동굴 안정성 입력자료로서의 탄성계수(Es)결정

  • 김정대;박인식
    • Tunnel and Underground Space
    • /
    • v.1
    • /
    • pp.32-38
    • /
    • 1991
  • 9 nuclear power plants are presently in operation in Korea. They produce radioactive waste of which the most long-lived radioactive elements need to be safely stored for hundreds of thousands of years, isolated from humanity and the environment. The safe disposal of high level radioactive waste in mined cavities requires knowledge of the mechanical. thermal and fluid flow characteristics of rock as perturbed by a thermal pulse The literature review was performed to assemble data on the following properties: modulus tensile strength compressive strength thermal expansion specific heat, thermal conductivity thermal diffusivity and permeability.

  • PDF

Analysis On Encryption Process In Data For Satellite

  • Bae, Hee-Jin
    • Proceedings of the KSRS Conference
    • /
    • 2008.10a
    • /
    • pp.216-219
    • /
    • 2008
  • It is necessary to study encryption for protection and safe transmission of the important information. Specially, the security in satellite data is also getting more and more important. This paper introduces DES and TDES algorithm, studies how to apply to satellite data with those algorithms and process of encryption and decryption for satellite data. Proposed encryption process in this paper will be utilized in satellite data for encryption in many satellites.

  • PDF

A Study on The Estimation of Escape Time In Compartment Fires (오피스빌딩 화재사고 발생 시 피난 적정성 평가에 관한 연구)

  • 진복권;정수일
    • Journal of the Korea Safety Management & Science
    • /
    • v.5 no.3
    • /
    • pp.57-67
    • /
    • 2003
  • The trends in building construction these days are moving towards having better work space and greater suitability for the use of information technology, Therefore people can work in a more relaxed, delightful and pleasant environment. So accidents like fire could cause the mass destruction of human beings. In this paper, we estimated the escape time from a building and simulated the study results on computer to see how safe it would be in a real situation.

A Study on Safe Vessel Traffic Speeds Based On a Ship Collision Energy Analysis at Incheon Bridge (인천대교 선박 충돌에너지 분석을 통한 선박의 통항안전 속력에 관한 연구)

  • Lee, Chang-Hyun;Lee, Hong-Hoon;Kim, Deun-Bong;Kim, Chol-Seong;Park, Seong-Hyun
    • Journal of the Korean Society of Marine Environment & Safety
    • /
    • v.22 no.6
    • /
    • pp.593-599
    • /
    • 2016
  • Incheon Bridge is 13.38 km long with an 800 m span, connecting Incheon International Airport and Songdo International City, Per hour 73.8 vessels navigate this space. The purpose of this study was to suggest a safe passing speed based on the displacement of a vessel based on the safety criteria of Incheon Bridge's anti-collision fence, which was designed during its initial construction. As AASHTO LRFD suggested, vessel collision energy, vessel collision velocity, and the hydrodynamic mass coefficient were considered to derive a safe vessel traffic speed. Incheon Bridge's anti-collision fence was designed so that 100,000 DWT vessels can navigate at a speed of 10 knot. This research suggests a safe speed for vessel traffic through a comparative analysis of an experimental ship's (300,000 DWT) speed and cargo conditions, regulation speed has been calculated according to the collision energy under each set of conditions. Additionally, safe traffic vessel's safe speed was analyzed with reference to tidal levels. Results from the experimental ship showed that a vessel of maximum 150,000 DWT is able to pass Incheon Bridge at a maximum of 7 knots with an above average water level, and is able to pass the bridge with a maximum of 8 knots under ballast conditions.

Analysis of the Importance of Planning Elements for Healing Gardens (치유정원 조성을 위한 계획요소의 중요도 분석)

  • Jung, Myoung-Ja;Park, Won-Kyu
    • Journal of the Korean Institute of Landscape Architecture
    • /
    • v.45 no.4
    • /
    • pp.81-91
    • /
    • 2017
  • The purpose of this study is to establish a system of planning elements necessary for effective healing garden. We suggested new planning parts and elements for healing garden through analyzing prior literature and evaluated the importance of planning elements through expert surveys. The results of the study are stated as follows. First, we suggested five planning parts and 19 planning elements. $\LARGE{\cdot}$ Planning parts: Physical environment, social environment, cognitive environment, functional environment, psychological environment. $\LARGE{\cdot}$ Planning elements: Plant planting, garden view, hydroponic space, shade space, work space, recreation space, community space, exercise space, landmark element, sign system, safe facilities and materials, disaster safety facility, universal design, accessible path, economical maintenance, sight openness, privacy guaranteed, variety of resting space, artistic element. Second, as a result of analyzing the importance of planning elements, the first place was the planting, the second place was the safety facilities for the disaster, and the third was diversity of rest space. In addition, the artistic elements and the landmark elements were ranked 18th and 19th, respectively. Third, we evaluated the level of importance of planning elements and classified it into three groups. The most important A group included two elements(plant planting, disaster safety facility), the next important B group included eleven elements(variety of resting space, community space, hydroponic space, universal design, safe facilities and materials, economical maintenance, accessible path, privacy guaranteed, garden view, work space, sight openness) and the less important C group included six elements(shade space, exercise space, recreation space, sign system, artistic element, landmark element). We suggest that, in creating a healing garden, the two elements in A group are essential elements and the eleven elements in B group should be importantly applied. In addition, the six elements in C group are recognized as arbitrarily selectable elements due to the relatively low importance levels.

Opening New Horizons with the L4 Mission: Vision and Plan

  • Kyung-Suk Cho;Junga Hwang;Jeong-Yeol Han;Seong-Hwan Choi;Sung-Hong Park;Eun-Kyung Lim;Rok-Soon Kim;Jungjoon Seough;Jong-Dae Sohn;Donguk Song;Jae-Young Kwak;Yukinaga Miyashita;Ji-Hye Baek;Jaejin Lee;Jinsung Lee;Kwangsun Ryu;Jongho Seon;Ho Jin;Sung-Jun Ye;Yong-Jae, Moon;Dae-Young Lee;Peter H. Yoon;Thiem Hoang;Veerle Sterken;Bhuwan Joshi;Chang-Han Lee;Jongjin Jang;Jae-Hwee Doh;Hwayeong Kim;Hyeon-Jeong Park;Natchimuthuk Gopalswamy;Talaat Elsayed;John Lee
    • Journal of The Korean Astronomical Society
    • /
    • v.56 no.2
    • /
    • pp.263-275
    • /
    • 2023
  • The Sun-Earth Lagrange point L4 is considered as one of the unique places where the solar activity and heliospheric environment can be observed in a continuous and comprehensive manner. The L4 mission affords a clear and wide-angle view of the Sun-Earth line for the study of the Sun-Earth and Sun-Moon connections from he perspective of remote-sensing observations. In-situ measurements of the solar radiation, solar wind, and heliospheric magnetic field are critical components necessary for monitoring and forecasting the radiation environment as it relates to the issue of safe human exploration of the Moon and Mars. A dust detector on the ram side of the spacecraft allows for an unprecedented detection of local dust and its interactions with the heliosphere. The purpose of the present paper is to emphasize the importance of L4 observations as well as to outline a strategy for the planned L4 mission with remote and in-situ payloads onboard a Korean spacecraft. It is expected that the Korean L4 mission can significantly contribute to improving the space weather forecasting capability by enhancing the understanding of heliosphere through comprehensive and coordinated observations of the heliosphere at multi-points with other existing or planned L1 and L5 missions.

Clinical Experiences about Correction of Web Space Contracture and Syndactyly using V-M Plasty (V-M 성형술을 이용한 지간구축 및 합지증의 교정 임상례)

  • Kim, Eui-Sik;Park, Sang-Ryul;Hwang, Jae-Ha;Kim, Kwang-Seog;Lee, Sam-Yong
    • Archives of Plastic Surgery
    • /
    • v.37 no.1
    • /
    • pp.46-51
    • /
    • 2010
  • Purpose: The loss of web space is caused by congenital syndactyly or acquired burn injury, trauma or surgery. Numerous surgical procedures have been described for restoration of the web space. Local flaps are usually preferred because of the easiness to perform and tolerable postoperative outcome. Among the various local flaps, the authors introduce V-M plasty for correction of web space contracture and syndactyly. Method: From March 2007 to Jun 2008, 4 patients underwent V-M plasty for correction of web space contracture and syndactyly. V-M plasty consists of 3 distinct triangular flaps. One triangular flap is designed next to the web region on the dorsal site of the hand, whereas the remaining 2 triangular flaps are placed on the volar site. The dorsal triangular flap is then placed between the volar adjacent triangular flaps. At the end of the operation, the involved fingers or toes are positioned in abduction to avoid kinking of the triangular flaps. Result: All the patients gained web functions with good esthetic appearance without any recurrence or complications. Mean follow-up was 8 months. Conclusion: V-M plasty is a safe, easy and rapid procedure to design and apply by using local tissues without the needs for a skin graft or risk of linear scarring and recurrence. The authors advise this versatile technique both in primary and recurrent cases of web space contracture and syndactyly.

Low Stratospheric Wind Measurement Using Mobile Rayleigh Doppler Wind LIDAR

  • Shu, Zhi-Feng;Dou, Xian-Kang;Xia, Hai-Yun;Sun, Dong-Song;Han, Yan;Cha, Hyunki;Kim, Dukhyeon;Wang, Guo-Cheng;Baik, Sunghoon;Hu, Dong-Dong
    • Journal of the Optical Society of Korea
    • /
    • v.16 no.2
    • /
    • pp.141-144
    • /
    • 2012
  • A mobile Rayleigh Doppler wind LIDAR at an eye-safe wavelength of 355 nm incorporating double-edge technique with triple-channel Fabry-Perot etalon is developed for wind measurement from 5 to 40km. The structure of this LIDAR system is described. An intercomparsion experiment with rawinsonde is made, showing good agreement with expected measurement accuracy. A continuous observation of stratosphere wind field for several days with temporal resolution of 15 min and spatial resolution of 200 m from 5 to 40 km is presented, demonstrating the stability and robustness of the LIDAR. A stratospheric quasi-zero wind layer can be found at around 20 km with a direction change from east to west evident in the continuous observation.

A Study on Passenger Information Integrated System Based IP (IP 기반의 승객안내 통합시스템에 대한 고찰)

  • Kwon, Myoung-Jin;Jeon, Yoon-Su;Lee, Chan-Yong;Park, Sung-Ho
    • Proceedings of the KSR Conference
    • /
    • 2011.05a
    • /
    • pp.1716-1721
    • /
    • 2011
  • The Public Address and Passenger Information System of Rolling Stock should be able to perform automatic announcements in connection with TCMS(Train Control and Monitoring System), common announcements and emergency announcements for safe operation and the passengers. CCTV(Closed Circuit Television) System also should be able to watch passenger compartment for safety. Those equipments are very important thing for train service and safety. but the installation of equipment is restricted by space, weight, modulation. therefore, Passenger Information Intergrated System(PIIS) is required to consider economical efficiency, technical trend, expansion and space insufficiency. and system based on IP network has to be considered as new PIIS. so PIIS could meet economical efficiency and expansion. and it could go further and share network with TCMS and others.

  • PDF