포괄적 IT 자산관리의 자동화에 관한 연구

황원섭,민대환,김정환,이한진 한국IT서비스학회 2024 한국IT서비스학회지 Vol.23 No.1

The IT environment is changing due to the acceleration of digital transformation in enterprises and organizations. This expansion of the digital space makes centralized cybersecurity controls more difficult. For this reason, cyberattacks are increasing in frequency and severity and are becoming more sophisticated, such as ransomware and digital supply chain attacks. Even in large organizations with numerous security personnel and systems, security incidents continue to occur due to unmanaged and unknown threats and vulnerabilities to IT assets. It’s time to move beyond the current focus on detecting and responding to security threats to managing the full range of cyber risks. This requires the implementation of asset Inventory for comprehensive management by collecting and integrating all IT assets of the enterprise and organization in a wide range. IT Asset Management(ITAM) systems exist to identify and manage various assets from a financial and administrative perspective. However, the asset information managed in this way is not complete, and there are problems with duplication of data. Also, it is insufficient to update of data-set, including Network Infrastructure, Active Directory, Virtualization Management, and Cloud Platforms. In this study, we, the researcher group propose a new framework for automated 'Comprehensive IT Asset Management(CITAM)' required for security operations by designing a process to automatically collect asset data-set. Such as the Hostname, IP, MAC address, Serial, OS, installed software information, last seen time, those are already distributed and stored in operating IT security systems. CITAM framwork could classify them into unique device units through analysis processes in term of aggregation, normalization, deduplication, validation, and integration.

반복하중을 받는 강판의 강도 및 변형특성

황원섭,윤형석,전승권,Hwang, Won-Sup,Yoon, Hyung-Suk,Jeon, Seung-Kwon 한국강구조학회 2001 韓國鋼構造學會 論文集 Vol.13 No.2

본 연구에서는 정적 및 반복하중을 받는 강판의 거동특성에 관하여 검토하였다. 강판의 강도에 관한 설계변수로서는 초지처짐과 형상비, 판의 폭-두께비등을 들 수 있으며, FEM해석을 통하여 이상의 설계변수에 관한 영향에 관하여 검토하였다. 정적 압축하중이 작용하는 판의 강도는 형상비가 1.0이하인 경우에는 형상비 변화에 따른 영향이 거의 나타나지 않았으며, 반복하중을 받는 판의 경우 폭-두께비와 변위 진폭의 크기가 강도에 크게 영향을 미치고 있음을 확인하였다. 이러한 해석결과를 기초로 본 연구에서는 반복재하에 의한 강도감소 특성을 고려한 강도곡선식을 제안하였으며, 또한 폭-두께비와 변위 진폭에 따른 판의 변형성능에 관해서 검토하였다 This paper presents are monotonic and cyclic behavior of steel plates. The effects of design parameters, initial deflection and aspect ratio, width-thickness ratio are studied by using FEM analysis. The results obtained from the monotonic loadings show that the aspect ratio(a/b) on the strength is to be neglected in the range of $(a/b){\leq}1.0$. The major cause of the reduction in strength sbbjected to cyclic loadings are width-thickness ratio and displacement amplitude. Based on the results, this paper presents some new strength curve with considering the cyclic deteriorations. The results are also discussed about the deformation capacity accordance with the width-thickness ratio and displacement amplitude.

단순지지 압연변두께 강판의 압축강도 특성

황원섭,김현민,Hwang, Won-Sup,Kim, Hyun-Min 한국강구조학회 2001 韓國鋼構造學會 論文集 Vol.13 No.3

본 연구에서는 압연변두께 강판(LP강판)의 기본적 강도특성에 대하여 검토하였다. LP강판의 강도에 관한 설계변수로서는 작용응력상태, 두께비와 판의 폭-두께비 등을 들 수 있으며, FEM해석을 통하여 이상의 설계변수에 관한 영향에 관하여 검토하였다. LP강판의 압축강도는 판에 작용하는 응력상태에 따라 변화하게 되며, 판의 처짐분포 형상과 폭-두께비 등이 강도저하의 주요원인이 된다는 것을 확인하였다. 이와 같은 해석 결과를 기초로 LP강판의 강도평가방벙에 대하여 검토하였으며, 등가두께를 이용하는 현행의 설계방법과 비교하였다. This paper presents the basic data for the strength behavior of longitudinally profiled plates(LP plate). The effects of loading conditions, thickness and slenderness ratio of plates are examined by using FEM analysis. The analysis results shown that the strength behavior of LP plate is varied with the loading conditions. The major causes of the reduction in strength are the distribution of deflection and the slenderness ratio of plate. Based on the results, this paper presents some discussions about the strength evaluation of LP plate with considering the equivalent thickness.

방재(防災)와 컴퓨터 네트워크

황원섭 한국전산구조공학회 1999 전산구조공학 Vol.12 No.4

최근 각종재해와 관련하여 방재시스템 구축에 관한 필요성이 제기되고 있다. 그러나 이를 위해서는 여러 분야의 지식을 종합적으로 정비하고 체계적인 운용이 필요하므로 아직까지 초기단계에 머물고 있는 실정에 있다고 할 수 있다. 본 기사는 K. TARUMA외 2인의 일본 토목학회지(1999년 1월호)에 소개한 일본 효고현의 방재시스템에 관한 기사를 번역한 것이다.

Central angle effect on connection behavior of steel box beam-to-circular column

황원섭,윤태양,김영필 국제구조공학회 2009 Structural Engineering and Mechanics, An Int'l Jou Vol.32 No.4

This paper presents the experimental results on the strength behavior and failure modes of box beam-to-circular column connections in steel piers. Previous research introduced parameters such as joint central angles, extension of horizontal stiffeners, and use of equivalent web depth, which ignored strength behavior and failure modes of box beam-to-circular column connections. The use of equivalent web depth d2 is not reasonable when central angle α is closer to 90o; therefore, a monotonic loading test has been performed for eight connection specimens. From the test, it is identified that the connection with the circular column is stronger than the connection with the box-sectioned substitution column. Also, the strength of the beam-to-column connections with horizontal stiffeners is higher than the one of the no column stiffeners. The concrete-filled effect of box beam-to-circular column connection is also investigated, and the experimental yield strength of the connection is compared with the theoretical one. Also, more a reasonable equivalent web depth is suggested. The failure modes of connection are clearly defined.

대학에서의 건설분야 관련 전공의 현주소

황원섭 한국복합신소재구조학회 2015 복합신소재학회논문집 Vol.6 No.3

고강도강 보강판의 극한강도에 관한 실험

황원섭,박완배,조은상,Hwang, Won-Sup,Park, Wan-Bae,Cho, Eun-Sang 한국강구조학회 2001 韓國鋼構造學會 論文集 Vol.13 No.5

본 연구는 고강도강(SM570, POSTEN80) 보강판의 거동특성을 실험을 토하여 검토한 것이다. 여기서는 압축력을 받는 총 7개의 보강판 시험체에 관한 재하실험결과를 정리하였으며, 이와 같은 실험결과를 기초로 하여 보강판 패널의 폭-두께비와 보강재의 강비에 관한 영향을 검토하였다. 또한 실험으로부터 구한 극한강도와 기준 내하력과의 비교를 통하여 보강판의 강도 특성에 관한 검토를 하였으며, 실험과 FEM 해석결과를 비교하였다. The behavior of stiffened plates with high strength steels (SM570 and POSTEN80) are experimentally investigated The results of compression tests on 7 specimens are reported herein. Based on the results the effects of width-thickness ratio of plate element and flexural rigidity of rib are examined. The strength behavior of stiffened plates are discussed with the comparisons of ultimate strength and design strength curve Furthermore experimental and FEM analysis results are also compared.

반복 하중을 받는 CFT 기둥-기초 연결부의 구조상세 개선을 위한 실험적 연구

황원섭,김희주,함준수 한국복합신소재구조학회 2015 복합신소재구조학회 학술발표회 Vol.2015 No.04

Generally, the Load of upper structures is transferred to concrete foundations through columns supporting them. So, the anchor connection system is usually adopted in order to connect the columns and the concrete foundations. To apply this system, the column-foundation connections need to be designed with enough stiffness. This study was experimentally conducted to effectively improve the structural detail of circular CFT column-foundation connections, to which axial and lateral load simultaneously apply. For this study, the test specimen with a general anchor and an anchor frame, and the specimens with the high-tension bolt and inner reinforcement were fabricated. In addition, double base plates were adopted to have the enough stiffness of connections. The behavioral characteristics and the failure mode were investigated and compared, and the improvement of structural detail of circular CFT column-foundation connections was suggested.

세계 최초의 부체(浮體)공항 실현을 향하여

황원섭 대한토목학회 1999 대한토목학회지 Vol.47 No.9

강교의 새로운 기술전개

황원섭 대한토목학회 1999 대한토목학회지 Vol.47 No.7