• The KIPS Transactions:PartA
• /
• v.12A no.5 s.95
• /
• pp.433-440
• /
• 2005

The sharing of objects for authoring frequently occurs among participating users in a cooperative authoring system where many users can collaborate. Floor control is therefore needed not only for minimizing the race condition during object accesses but also for ensuring the exclusive use of objects. h floor is a temporary access right that is given to a participating user who wants to use a shared object. Although the floor control methods for a single session environment can be found in various literature, those methods for a multi-session environment can hardly be found. In a multi-session environment, an object can be shared by multiple sessions. As a solution to the problems due to object sharing in such an environment, this paper presents a floor control method based on the chair-of-chair guidance. This method is an extension of those based on traditional chair guidance; the chair-of-chair elected among session chairs exists in this method.

• Proceedings of the Korean Information Science Society Conference
• /
• 1999.10b
• /
• pp.233-235
• /
• 1999

공동저작 관리 시스템은 효율적인 공동저작을 위해 공유객체관리기능, 세션관리기능, 텔리포인팅(telepointing) 기능, 그리고 공동저작 인지(collaboration awareness) 기능들을 제공해야 한다. 이 중 공유객체관리기능은 저작자로 하여금 등록된 공유객체들을 편리하게 액세스 할 수 있도록 하고 저작에 필요한 공유객체들을 등록, 변경, 그리고 삭제할 수 있도록 함으로써 작업효율을 증대시킬 수 있는 핵심기능이다. 최근의 연구는 주로 등록된 공유객체의 변경 및 불필요한 정보전송으로 인한 작업지연, 그리고 공유객체 액세스 권한의 효율적인 관리를 위한 플로어 제어(floor control)에 그 초점을 맞추고 있으나 공유객체관리를 위한 기법이나 구조에 관한 연구는 미흡하다. 편리한 공동저작을 위해서는 분산환경의 특징상 가 저작자들의 시스템에 자연스럽게 분산되어 있는 공유객체들을 저작자나 공유객체들의 실제 위치에 상관없이 액세스할 수 있도록 하고, 저작자로 하여금 공유객체의 등록 시에 유일명 부여(unique naming)를 가능하게 하여 필요한 공유객체를 쉽게 검색할 수 있도록 해야 한다. 이를 위해 본 논문은 공유객체 디렉토리 서비스(shared-object directory service)를 제안한다. 공유객체 디렉토리 서비스는 일반 디렉토리(normal directory)와 세션 디렉토리(session directory)를 저작자에게 제공하여 공유객체의 등록시에 유일명 부여를 가능하게 하고 필요한 공유객체 검색을 용이하게 한다.

• Journal of the Earthquake Engineering Society of Korea
• /
• v.13 no.4
• /
• pp.15-23
• /
• 2009

An experimental study was performed to evaluate seismic reduction performance and the applicability of 2-dimensional floor isolation system to the main control room of a nuclear power plant. A lead-rubber bearing (LRB) and a friction pendulum system (FPS) were designed and fabricated for a 2-dimensional floor isolation system. A partial experimental model of a main control room with the LRB and FPS was tested using a shaking table. The experimental model consisted of a control panel, a 2.5m${\times}$2.5m access floor, and four LRB and FPS. The artificial time histories based on the horizontal floor response spectrums (OBE, SSE) of the main control room were used as earthquake input signals. Compared to the non-isolated system, the seismic response of experimental models using a 2-dimensional floor isolation system showed considerable seismic reduction performance against an earthquake.

• Journal of the Earthquake Engineering Society of Korea
• /
• v.12 no.1
• /
• pp.57-66
• /
• 2008

An experimental study was performed to evaluate seismic reduction performance and applicability of 3-dimensional floor isolation system to the main control room of nuclear power plant. A friction pendulum system(FPS) and air spring were designed and fabricated for 3-dimensional floor isolation system. Two kind of the partial experimental model of a main control room attached to the FPS and air spring were tested on the shaking table. The experimental model consisted of a control panel, a $2.5m{\times}2.5m$ access floor, four FPS and air springs. The artificial time histories based on the vertical and horizontal floor response spectrums(OBE, SSE) of the main control room were used as the earthquake input signals in the test. Compared to non-isolated system, the seismic response of experimental models using 3-dimensional floor isolation system were shown considerable seismic reduction performance.