• 한국멀티미디어학회논문지
• /
• 제6권1호
• /
• pp.15-27
• /
• 2003

Recently, the volume of data is increasing rapidly in server for multimedia service, according to development of multimedia application environment. In recent research for storage technology the technology like of the SAN(Storage Area Network) advantages in scalibility of storage devices, and can read data from multiple disk arrays through RAID 0, 5. The RAID 0 and 5 translate to logical address to physical address using equation, but in case of adding disks at the system with equation -based mapping, the problem that we must rearrange the whole data in the previous disks happens. We use the mapping table to solve this problem in recent, but we can not load the whole mapping table in main memory because it occupies too large space. Therefore the extra I/Os are demanded to evaluate real physical address of data, so total performance of the system is degraded. In this paper, we propose the mapping method that supports the scalibility in RAID 0 or 5 system. The proposing method applies small metadata, so- called SZIT and simple equation, so it is possible that we make translate logical address to physical address rapidly and it is scalable in disk extending simultaneously Our suggesting method, if we add disks to the striping system for expanding of storage capacity, has an advantage of never stop service. So, SZlT-based mapping method can do online-disk-expanding in real-time service.

• 한국조경학회지
• /
• 제19권1호
• /
• pp.31-43
• /
• 1991

In considering the relationship between natural beauty and the human frame of mind, or the interconnections between the Landscape and the point of view, we are concerned primaily with the external factors. Historically, certain physical features tended to cause shifts in human attitudes toward landscapes; We concentrate on this phenomenon of changeful scenery rather than on what psychological factors caused certain landscapes to be regarded as remarkable or unique. In a similar fashion we must ask ourselves what the basic elements in landscape are and attempt to ascertain their visual and spatial characteristics before we attempt to desingn environments that are fundamentally, physical in character. Futhermore, the experience of meanings, a part of literatual association process, appeared through the intension of nature study looking for the best landscape phenomena out of simple naturelooking. Of course, as the variable degree of landscapes changes, the dualistic relationship between humans and objects shows the different experience of meanings as the time changes even in landscapes which possess variable factors in same season. The study is conducted by defining the nature of recognizing and appreciating the logical structure of the concept "Landscape" after analysis of meaning context appeared in 'Kyung' which is consists of time, space and elements in landscape.

• 디자인학연구
• /
• 제16권3호
• /
• pp.71-80
• /
• 2003

가상현실 분야는 이제 대중화시대를 맞이하고 있다. 데스크탑 가상현실 산업은 다양한 Web VR 애플리케이션을 중심으로 급속히 성장하고 있는 추세이다. 3차원 가상공간에서 사용자 네비게이션의 수행은 가상의 공간에 설정된 논리적 구조를 인지하고 설정된 상호작용을 이해하며 길을 찾아가는 복잡한 과정이다. 그 것은 사용자가 임으로 설정하는 과정이 아니고 기획단계에서 면밀히 디자인되고 설계된 기술적, 기법적 그리고 개념적 과정인 것이다. 이에 따라 본 논고에서는 3차원 가상공간에서의 상호작용적 네비게이션과 관련된 기술적, 기법적, 그리고 개념적 기초이론들을 총체적으로 고찰하고 있다.

• 한국실내디자인학회논문집
• /
• 제13권4호
• /
• pp.92-101
• /
• 2004

A rational and logical sense of design often found in modernism(including minimalism) sometime deal with the criticism that such characteristics which derived from those of modernism, lack emotion31 qualities(arises from human feelings). It consequently took them to adopt traditional designs in the past, creating such conditions that constantly escapes from‘present’ one and back to the‘new’. This mode develops a trend in current interior design which decorative elements such as art work: traditional arts, folk crafts, flowers and green are much evident. Thus, using many decorative elements of the past(what was once banned since modernism), brings up the interesting point of view that needs to be discussed a new decorative trend if today's interior design. It will approach by comparing significances of past decorative expressions with present through which investigation, will show a better understanding of recent characteristics in interior designing, a.k.a, a current trend since minimalism, embracing important qualities of culture, ecology and people - against today's less-inspired, standardizing spaces.

• 한국실내디자인학회논문집
• /
• 제17권1호
• /
• pp.69-76
• /
• 2008

The purpose of this study is to analyze the interior characteristics of the Yale center for British art by Louis I. Kahn. As his last realized project, the Yale center for British art shows Kahn's latter architectural thoughts about exterior/interior, space/structure and theory/practice. Kahn arranged unit space(room) around two interior courts and laminated them vertically. This spatial configuration is the result of solving the urban context which needed the continuity of street and complicated program including art museum, retail shop, studio and library. Although Kahn adpted severe formal configuration, he added changes to spatial relation. The visualization of architectural system is realized by revealing the relation of the unit space and structure. And this emphasized the presence of the center. The emphasis of tectonic expression is also the characteristics of interior in that structure is the logical part of whole building system rather than concealing object for the exterior of buildings. In the Yale center for British art, interior characteristics are summarized as spatial configuration based on the relation between unit space and two courts, the visualization of structural order, and the relationship between structure and light.

• 시스템엔지니어링학술지
• /
• 제19권1호
• /
• pp.56-63
• /
• 2023

For the success of system development, it is necessary to systematically manage the requirements that are the basis of system development and its verification results. In order to follow the principles of SE(Systems Engineering)-based V&V(Verification&Validation) process, requirements can be managed by securing the requirements and their establishments, design compliances, and verification compliances according to the system development lifecycle. Especially, in a large-complex system research and development project, such as a space launch vehicle development project, many participants establish, verify, and validate numerous requirements together during the project. Therefore, logical and systematic requirements management, including guarantee of data integrity, change history, and traceability, is very important for multiple participants to utilize numerous requirements together without errors. This paper introduces the practical requirements and verification management for the requirements-based development process in the space launch vehicle development project.

• 한국정보과학회논문지:소프트웨어및응용
• /
• 제29권6호
• /
• pp.377-385
• /
• 2002

다양한 사건들의 무대로서의 시공간 상황의 구축을 위한 정통적 시뮬레이션 기반을 개발한다. 사이버 세계의 정통성, 다시 말해 실제에 대한 논리적 충실성은 그 세계에서 일어나는 사건들의 다양성과 예측 불가성을 최대화함으로써 실현한다. 시공간에서 일어나는 사건의 시뮬레이션을 위한 지식 컴포넌트는 환경 요인, 객체, 사건, 상관관계가 있다. 자유 재량적 사건의 정통 시뮬레이션을 실현하기 위해 사건 활성화, 실행 방법과 사건 인지 함수들을 고안하였다. 본 시뮬레이션 환경에서 자주적인 에이전트들은 독자적인 존재와, 사건의 실행과 분리된 계획을 하는 능력을 가지고 있다. 사람의 의도를 반영할 수 있는 자유 재량적 사건의 정통 시뮬레이션과 관련 있는 기본적인 구성 요소들을 확인하였다. 시뮬레이션 방법의 실행 가능성을 보이기 위해 핵심적인 기술들을 중심으로 구현의 예를 보인다.

• 조명전기설비학회논문지
• /
• 제21권1호
• /
• pp.28-34
• /
• 2007

본 연구에서는 새로 고안된 방전 논리 게이트 PDP의 논리 게이트 입력인 DC 방전특성에 대해 고찰하였다. 새로 고안된 방전 논리 게이트는 방전 경로에 따른 전극사이의 전위차를 제어하여 논리 출력을 유도한다. 실험결과 이 DC 방전들의 안정성을 위해 프라이밍 방전을 인가한 경우가 인가하지 않은 경우에 비해 방전지연시간이 1/3로 단축되며 방전개시전압은 1/2로 감소하였다. 또한 이 프라이밍 방전에서 발생한 공간전하는 방전종료 후 $30[{\mu}s]$ 정도까지 영향을 미친다. 그리고 시간적, 공간적 거리변화에 파라 공간전하가 DC 방전에 미치는 영향을 측정한 결과, 주 방전에서부터 시간적으로 멀어지는 것보다 공간적으로 멀어지는 것이 주 방전의 영향에서 쉽게 벗어날 수 있음을 알았다. 그러므로 각 주사전극 마다 방전 논리 게이트들을 독립적으로 동작시킬 수 있다는 결론을 얻었다.

• 한국컴퓨터정보학회논문지
• /
• 제25권11호
• /
• pp.97-104
• /
• 2020

본 논문에서는 우주라는 특수한 환경에서 권장하는 무선 통신의 채널 코딩으로 암호화된 이미지가 노이즈에 많은 영향으로 손상되는 문제를 개선하기 위해 난수발생기 PP(PingPong256)와 셔플기법을 제안한다. PP는 512비트의 초기값을 입력받아 끊임없이 난수를 생성할 수 있다. 난수는 이미지와 배타적 논리연산을 통해 암호화가 가능하다. 셔플 기법은 이미지 픽셀위치와 난수 배열위치를 동기화하고 난수 배열을 오름차순으로 위치를 이동하면서 이미지 픽셀 위치를 무작위로 재배열한다. 따라서 채널 코딩에 PP와 셔플 기법을 사용하면 모든 픽셀이 미세하게 분산되어 열악한 전송 환경에도 높은 품질의 이미지를 전송할 수 있다.

• 한국실내디자인학회논문집
• /
• 제40호
• /
• pp.109-116
• /
• 2003

The space planning and interior layout of recovery unit should be determined carefully for patient's nursing and observation which is considered to prevent infection and to cope quickly with emergency situation after surgical operation. Recently, the recovery unit in medical facilities is planned and managed without consideration of operating system, sanitary facilities and prior condition of space. Therefore, there is required to the logical criterion of architectural planning for patient's recovery unit which is concerned about opinion of medical team, anesthetist, sanitarian, architect and patient as a user. As the result, this study would apply to design guideline for the architectural planning of patient's recovery unit.