• Title/Summary/Keyword: standards and codes

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A Study on the Building Codes in relation with Campus Facility Planning (대학시설계획(大學施設計劃)에 있어서 건축관련법(建築關聯法)의 적용(適用)에 관한 연구(硏究))

  • Lee, Keun-Wook
    • Journal of the Korean Institute of Educational Facilities
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    • v.2 no.1
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    • pp.27-41
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    • 1995
  • This study deals zoning and building codes that act on the physical planning and design of university campus in Korea. Campus facility related laws were analyzed in relation to various factor found out through the survey on the existing campuses in rural or urban area. The study shows that the gaps between the standards required by the law and the state of facilitation in many universities could be filled by applying varied norms in accordance with the locational characteristics of each university.

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Can irregular bridges designed as per the Indian standards achieve seismic regularity?

  • Thomas, Abey E.;Somasundaran, T.P.;Sajith, A.S.
    • Advances in Computational Design
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    • v.2 no.1
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    • pp.15-28
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    • 2017
  • One of the major developments in seismic design over the past few decades is the increased emphasis for limit states design now generally termed as Performance Based Engineering. Performance Based Seismic Design (PBSD) uses Displacement Based Design (DBD) methodology wherein structures are designed for a target level of displacement rather than Force Based Design (FBD) methodology where force or strength aspect is being used. Indian codes still follow FBD methodology compared to other modern codes like CalTrans, which follow DBD methodology. Hence in the present study, a detailed review of the two most common design methodologies i.e., FBD and DBD is presented. A critical evaluation of both these methodologies by comparing the seismic performance of bridge models designed using them highlight the importance of adopting DBD techniques in Indian Standards also. The inherent discrepancy associated with FBD in achieving 'seismic regularity' is highlighted by assessing the seismic performance of bridges with varied relative height ratios. The study also encompasses a brief comparison of the seismic design and detailing provisions of IRC 112 (2011), IRC 21 (2000), AASHTO LRFD (2012) and CalTrans (2013) to evaluate the discrepancies on the same in the Indian Standards. Based on the seismic performance evaluation and literature review a need for increasing the minimum longitudinal reinforcement percentage stipulated by IRC 112 (2011) for bridge columns is found necessary.

태평양연안국의 원자력 기술기준 전망

  • W. Edwards Norman
    • Nuclear industry
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    • v.7 no.7 s.53
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    • pp.32-38
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    • 1987
  • 본 논문은 지난 4월 11일 미국원자력학회(ANS) 한국지부의 월례기술토론회에서 ${\ulcorner}$The Future Outlook for Consistencies in Pacific Basin Codes and Standards${\lrcorner}$라는 제목으로 행한 특별강연문을 번역한 것이다.

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A Study on the Prescriptions of American Codes for Straw Bale Structures and the Legislation Direction of Korean Straw Bale Code (미국 짚단벽구조 법규 분석 및 국내의 법제화 방향 연구)

  • Kim, Jeong-Gyu
    • KIEAE Journal
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    • v.9 no.2
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    • pp.91-98
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    • 2009
  • The purpose of this study is analyzing the prescriptions of American codes for straw bale structures and proposing the legislation direction of Korean building code. The process of this study is as follows: (1) To set up the legislation direction of straw bale code of Korea, this study investigated the current state and features of straw bale houses in Korea, and looked into the worldwide status of straw bale codes and permitting. (2) To provide basic data for the legislation of Korean straw bale code or guideline, this study analyzed American codes for straw bale structures like the Tucson/Pima County Arizona Building Code Appendix Chapter 72 - Straw-Bale Structures, California State Guidelines for Straw-Bale Structures, New Mexico Standards for Non-load Bearing Baled Straw Construction, Oregon State Residential Code Appendix M - Straw-Bale Structures and so on. The analysis items are the scope of rule application, material specifications, requirements for straw bale walls/foundations and construction requirements. (3) On the base of analysis of American straw bale codes, this study proposed the legislation process and direction of Korean straw bale code and guideline.

A Study on Channel Decoder MAP Estimation Based on H.264 Syntax Rule (H-264 동영상 압축의 문법적 제한요소를 이용한 MAP기반의 Channel Decoder 성능 향상에 대한 연구)

  • Jeon, Yong-Jin;Seo, Dong-Wan;Choe, Yun-Sik
    • Proceedings of the KIEE Conference
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    • 2003.11b
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    • pp.295-298
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    • 2003
  • In this paper, a novel maximum a posterion (MAP) estimation for the channel decoding of H.264 codes in the presence of transmission error is presented. Arithmetic codes with a forbidden symbol and trellis search techniques are employed in order to estimate the best transmitted. And, there has been growing interest of communication, the research about transmission of exact data is increasing. Unlike the case of voice transmission, noise has a fatal effect on the image transmission. The reason is that video coding standards have used the variable length coding. So, only one bit error affects the all video data compressed before resynchronization. For reasons of that, channel needs the channel codec, which is robust to channel error. But, usual channel decoder corrects the error only by channel error probability. So, designing source codec and channel codec, Instead of separating them, it is tried to combine them jointly. And many researches used the information of source redundancy In received data. But, these methods do not match to the video coding standards, because video ceding standards use not only one symbol but also many symbols in same data sequence. In this thesis, We try to design combined source-channel codec that is compatible with video coding standards. This MAP decoder is proposed by adding semantic structure and semantic constraint of video coding standards to the method using redundancy of the MAP decoders proposed previously. Then, We get the better performance than usual channel coder's.

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Malicious Codes Re-grouping Methods using Fuzzy Clustering based on Native API Frequency (Native API 빈도 기반의 퍼지 군집화를 이용한 악성코드 재그룹화 기법연구)

  • Kwon, O-Chul;Bae, Seong-Jae;Cho, Jae-Ik;Moon, Jung-Sub
    • Journal of the Korea Institute of Information Security & Cryptology
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    • v.18 no.6A
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    • pp.115-127
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    • 2008
  • The Native API is a system call which can only be accessed with the authentication of the administrator. It can be used to detect a variety of malicious codes which can only be executed with the administrator's authority. Therefore, much research is being done on detection methods using the characteristics of the Native API. Most of these researches are being done by using supervised learning methods of machine learning. However, the classification standards of Anti-Virus companies do not reflect the characteristics of the Native API. As a result the population data used in the supervised learning methods are not accurate. Therefore, more research is needed on the topic of classification standards using the Native API for detection. This paper proposes a method for re-grouping malicious codes using fuzzy clustering methods with the Native API standard. The accuracy of the proposed re-grouping method uses machine learning to compare detection rates with previous classifying methods for evaluation.

LATEST INTERNATIONAL DEVELOPMENTS IN PASSIVE FIRE PROTECTION

  • Marx, Olliver
    • Proceedings of the Korea Institute of Fire Science and Engineering Conference
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    • 1997.11a
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    • pp.227-243
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    • 1997
  • Fire and smoke can from a small ignition source develop rapidly. Active systems in combination with Passive Fire Protection measures will offer highest safety standards to the building's developers and occupants. Nevertheless, the fire growth is very unpredictable and it is therefore essential at the planning stage that tested solutions are well selected according to National codes and later on installed by qualified contractors to ensure optimum performance. This demonstrates that Passive Fire Protection as safety measure cannot be neglected. Recent fire cases all over the world still proof that fire can develop any time and any where even in countries of high safety standards.

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Operating Pressure Conditions for Non-Explosion Hazards in Plants Handling Propane Gas

  • Choi, Jae-Young;Byeon, Sang-Hoon
    • Korean Chemical Engineering Research
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    • v.58 no.3
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    • pp.493-497
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    • 2020
  • Hazardous area classification is designed to prevent chemical plant explosions in advance. Generally, the duration of the explosive atmosphere is used for zone type classification. Herein, IEC code, a quantitative zone type classification methodology, was used to achieve Zone 2 NE, which indicates a practical non-explosion condition. This study analyzed the operating pressure of a vessel handling propane to achieve Zone 2 NE by applying the IEC code via MATLAB. The resulting zone type and hazardous area grades were compared with the results from other design standards, namely API and EI codes. According to the IEC code, the operating pressure of vessels handling propane should be between 101325-116560.59 Pa. In contrast, the zone type classification criteria used by API and EI codes are abstract. Therefore, since these codes could interpret excessively explosive atmospheres, care is required while using them for hazardous area classification design.

Predicting the axial load capacity of high-strength concrete filled steel tubular columns

  • Aslani, Farhad;Uy, Brian;Tao, Zhong;Mashiri, Fidelis
    • Steel and Composite Structures
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    • v.19 no.4
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    • pp.967-993
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    • 2015
  • The aim of this paper is to investigate the appropriateness of current codes of practice for predicting the axial load capacity of high-strength Concrete Filled Steel Tubular Columns (CFSTCs). Australian/New Zealand standards and other international codes of practice for composite bridges and buildings are currently being revised and will allow for the use of high-strength CFSTCs. It is therefore important to assess and modify the suitability of the section and ultimate buckling capacities models. For this purpose, available experimental results on high-strength composite columns have been assessed. The collected experimental results are compared with eight current codes of practice for rectangular CFSTCs and seven current codes of practice for circular CFSTCs. Furthermore, based on the statistical studies carried out, simplified relationships are developed to predict the section and ultimate buckling capacities of normal and high-strength short and slender rectangular and circular CFSTCs subjected to concentric loading.

Design guides to resist progressive collapse for steel structures

  • Mirtaheri, M.;Zoghi, M. Abbasi
    • Steel and Composite Structures
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    • v.20 no.2
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    • pp.357-378
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    • 2016
  • The progressive collapse phenomenon in structures has been interested by civil engineers and the building standards organizations. This is particularly true for the tall and special buildings ever since local collapse of the Ronan Point tower in UK in 1968. When initial or secondary defects of main load carrying elements, overloads or unpredicted loads occur in the structure, a local collapse may be arise that could be distributed through entire structure and cause global collapse. One is not able to prevent the reason of failure as well as the prevention of propagation of the collapse. Also, one is not able to predict the start point of collapse. Therefore we should generalize design guides to whole or the part of structure based on the risk analysis and use of load carrying elements removal scenario. There are some new guides and criteria for elements and connections to be designed to resist progressive collapse. In this paper, codes and recommendations by various researchers are presented, classified and compared for steel structures. Two current design methods are described in this paper and some retrofitting methods are summarized. Finally a steel building with special moment resistant frame is analyzed as a case study based on two standards guidelines. This includes consideration of codes recommendations. It is shown that progressive collapse potential of the building depends on the removal scenario selection and type of analysis. Different results are obtained based on two guidelines.