• International Journal of CAD/CAM
• /
• 제6권1호
• /
• pp.125-137
• /
• 2006

Nowadays, many commercial CAD systems support history-based, constraint-based and feature-based modeling. Unfortunately, most systems fail during the re-evaluation phase when various kind of topological changes occur. This issue is known as "persistent naming" which refers to the problem of identifying entities in an initial parametric model and matching them in the re-evaluated model. Most works in this domain focus on the persistent naming of atomic entities such as vertices, edges or faces. But very few of them consider the persistent naming of aggregates like shells (any set of faces). We propose in this paper a complete framework for identifying and matching any kind of entities based on their underlying topology, and particularly shells. The identifying method is based on the invariant structure of each class of form features (a hierarchical structure of shells) and on its topological evolution (an historical structure of faces). The matching method compares the initial and the re-evaluated topological histories, and computes two measures of topological similarity between any couple of entities occurring in both models. The naming and matching method has been implemented and integrated in a prototype of commercial CAD Software (Topsolid).

• Journal of the Korean Society for Industrial and Applied Mathematics
• /
• 제8권1호
• /
• pp.11-30
• /
• 2004

Access Control is one of essential branches to provide system's security. Depending on what standards we apply, in general, there are Role-based access control, History-based access control. The first is based on subject's role, The later is based on subject's history. In fact, RBAC has been implemented, we are using it by purchasing some orders through the internet. But, HBAC is so complex that there will occur some errors on the system. This is more and more when HBAC is used with other access controls. So HBAC's formalization and model which are general enough to encompass a range of policies in using more than one access control model within a given system are important. To simplify these, we design the mathematical model called non-access structure. This Non-access structure contains to historical access list. If it is given subjects and objects, we look into subject grouping and object relation, and then we design Non-access structure. Then we can determine the permission based on history without conflict.

• 안보군사학연구
• /
• 통권2호
• /
• pp.91-119
• /
• 2004

Development of science technology, computer network and software technology has not only changed various areas of the society, but also brought rapid change in the condition and the way of performing war. Historical lessons learned from the war in Iraq tells that military capabilities corresponding to the new paradigms of war needs to be assured in order to preserve national interest and take victory in future warfare. Thus, the performance in the latest war in Iraq, the estimated performance in future war and the performance of war in the Korean Peninsula has been put together and analyzed to indicate the direction our force should be built and the structure to be improved. Under all circumstances and threats the military must defend our nation and territory. When war breaks out the military must perform it's basic duty to end war by decisive operations. As the saying is "To preserve peace, prepare for war," continuous increase of military strength and improvement of military structure corresponding to the change of national security environment and weapon system is necessary.

• 한국영어학회지:영어학
• /
• 제4권2호
• /
• pp.151-174
• /
• 2004

A historical investigation reveals that English preposition with underwent a change from OPPOSITION to ASSOCIATION and further to ACCOMPANIMENT, where the first stage shows peculiarity in that the two concepts involved comprise an unusual set to form an extensional chain. Intrigued by this oddity, this paper aims to investigate the semantic structure of English preposition with from a grammaticalization perspective. We review mechanisms and models of semantic change and evaluate their adequacy with the semantic structure and change shown by with. Drawing upon the observed fact that with underwent the apparent antonymic semantic change, it is argued that such semantic change mechanisms as metaphor, metonymy, subjectification, and generalization have difficulties explaining the change, and that only the Frame-of-Focus Variation can effectively account for this peculiar change type. In terms of semantic change models, we argue that the Bleaching Model cannot effectively provide an explanation; that the Loss and Gain Model has problems in explaining the motivation of change directions; that the Metonymic-Metaphoric Model cannot be assessed at the current level of investigation; and that the Overlap Model and the Prototype Extension Model excellently account for the macro-level changes.

• Journal of the Korean Institute of Landscape Architecture International Edition
• /
• 제1호
• /
• pp.67-74
• /
• 2001

Now that importance of landscape planning unique to each area is emphasized, it is necessary to conduct landscape planning by taking advantage of natural environments unique to each ares, because its natural environments are regarded as one of the assets the area possesses. This study targets at Kawachinagano City, Osaka, one of the residential areas that I not only rich in natural and historical elements, but also has been rapidly growing. The purposes of this study are to evaluate change in landscape structure over time by analyzing relation between landform and pattern of expanding the built-up area at three time points of 1932, 1967, and 1994 with GIS (ARC/INFO 7.0.3, ARC/View 3.0 (ESRI)), as well as to make some suggestions for planning landscape unique to the area. Data on main ridges, sub ridges, main rivers, and other landform were read from the elevation map, and data on woodland, and parks and open spaces (having more than 3 ha area) were read from the existing land use map. The data were used to understand the natural structure of the city from topographic viewpoint. Next, the existing land use map prepared with data on the built-up area and urban axes consisting of roads and streets were overlaid on the elevation map in order to understand relation between pattern of expanding the built-up area and the natural structure.

• 한국학교보건학회지
• /
• 제17권2호
• /
• pp.127-150
• /
• 2004

Objectives: The purpose of this study is to provide a basic structure for the establishment of the direction of school health programs, an overview of the historical changes of school health programs and their results, and a conceptual framework on school health programs. Methods: The data analysis has been done using a statistical almanac, relevant laws and regulations, operation handbook of the program, theses, reports, records of public hearings, and other reports as a technical research primarily based on evidence. The methodology of this research classifies the development and growth transition of school health programs during a historical period through the investigation of regulations, organization, manpower, and its program via its development process and to provide a basic tool to design a solid school health policy. Results: A The growth and development of school health programs The development of school health programs was classified into three different periods including the forthcoming period (1945~1967), the completion period (1967~1993), and the actualization period based on the establishment of legislation for School Health Law, other relevant legislation, and the contents of school health programs (1993~present). B. Policy direction of school health programs School health programs have reestablished their goals and range based on basic direction, and developed the W1it model of information structure for school health program management and its basic structure. Finally, the stepwise support system through the building of the school health support center is recommended. (1) The basic direction of school health programs has proposed 7 basic goals to reestablish the policy direction of health improvement based on total health. (2) The W1it model of information system and the school health information system for school health program management has been developed to utilize positive management. (3) School health policy through the study of the health laws and systems has been developed. The necessity of school health support center for the policy support, functional support and operation support has also been proposed. Conclusions: It is necessary to build a school health support center that consists of health professionals in charge of policy support, functional support, and program support of school health programs in order to realize and develop new policy.

• 한국조경학회지
• /
• 제38권5호
• /
• pp.122-133
• /
• 2010

인간은 장소와 일체감을 이루고자 하며, 이를 통해 자신의 정체성과 장소의 정체성을 동시에 이루어간다. 인간은 자신들이 속한 문화와 환경에 따라 고유한 관념을 형성하고, 그 관념은 상징을 통해 장소에 표현되는데, 상징은 공간구조와 이를 형태화하는 디테일에 의해 장소에 구체화된 형태를 나타낸다. 본 연구는 이슬람정원을 대표하는 '사자의 중정'을 대상으로 공간구조와 디테일을 비교 검토하여 둘의 상호보완적 관계와 디테일이 장소성에 미치는 영향을 고찰하고자 하였다. 양자 간의 비교는 내재하는 상징과 의미, 디자인 언어, 형성배경과 디테일을 통한 장소체험의 측면에서 이루어졌다. 먼저, 공간구조는 차하르바그의 기본형태로 구성되어 코란에서 표현하는 낙원을 상징하였다. 이슬람교, 아랍문화, 스페인 무슬림왕조의 생활양식을 배경으로 공간구조가 형성되어 전통적인 이슬람정원과 크게 다르지 않았다. 디테일은 공간구조를 형태화하는 동시에 낙원, 왕권, 신성, 자연 등을 상징하고, 이슬람교, 스페인 무슬림왕조의 문화, 아랍문화, 안달루시아의 지역성, 무데하르 양식 등을 나타내고 있다. 디테일은 스페인 무슬림왕조의 일상에 생동감과 변화감을 주어 폐쇄적인 궁전생활에 활력을 주며, 안달루시아지역 왕조의 특성을 갖는 사자조각상으로 중정의 중심을 이루어 다른 이슬람정원에서 볼 수 없는 독특한 분위기를 자아내었다. 사자의 중정의 디테일은 오감을 통한 체험의 대상이며, 인간과 장소가 하나가 되도록 해주어 장소성을 형성했음을 알 수 있었다. 사자의 중정의 디테일을 통해 스페인 무슬림왕조의 일상과 이상을 파악할 수 있었고, 그들과 정원이 일체감을 이루었으며, 디테일은 공간구조보다 더 풍부한 의미와 디자인언어를 담고 있음을 알 수 있었다. 결론적으로 디테일은 장소성을 형성하는 중요한 체험적 대상임이 파악되었다.

• 말소리와 음성과학
• /
• 제1권2호
• /
• pp.129-140
• /
• 2009

The purpose of the present study is to investigate frequency related information and syllable structure constraints on Sino-Korean. Previous studies on Sino-Korean have mostly investigated the historical change of sounds and reviewed archaic features of Chinese language in Sino-Korean. Unfortunately, there is little study on the sounds of contemporary Sino-Korean in terms of syllable structure constraints. For the purpose of the present study, sounds of 7,742 Chinese characters used in Sino-Korean (7,795 syllables) were investigated and syllable matrices made based on the results of frequency related information. As a result, 483 syllable types were observed and the most frequently observed syllables were as follows: /ku/ (103) > /ki/ (100) > /ju/ (87) > /pi/ (86). Only 16 out of 19 consonants are used for Sino-Korean. /$t^{\ast}$/ and /$p^{\ast}$/ are never used in Sino-Korean and /kh, $s^{\ast}$, $k^{\ast}$/ occur only a few times (3, 2, 1 respectively). /k/ (17.5%) shows the highest frequency and /n, ${\eta}$, 1, tc, m/ occupied the next rankings. Among 20 vowel types, /a/ showed the highest frequency and /o, u, i, $j{\Lambda}$, ${\Lambda}$/ occupied the next rankings. Based on the syllable matrices, gaps were observed and classified into accidental or systematic ones. Onset and nucleus, nucleus and coda, onset and coda, and other syllable structure constraints of Sino-Korean were listed.

• 대한건축학회논문집:계획계
• /
• 제35권10호
• /
• pp.63-70
• /
• 2019

The Busan branch of the former Toyo Takushoku Co. carried out the same business as a bank at the time of construction. This required an open space of long-span, which had no pillars, on the first floor where many customers frequently visited. In addition, an office space is required in the upper part, and a column is arranged so as to place a corridor in the center. It was designed with modern complex structures for space utilization and structural adaptation. As a result, scientific structural calculations of the modern era began and various structural technologies were introduced, the rationalization and value of various spatial characteristics and their structural design were analyzed from a technical historical perspective in the structure requiring long-span space. The Busan branch of the former Toyo Takushoku Co. is a complex structure with three structures. It is highly valuable as a building that tried to design its structure in a variety of spaces through calculation and introduction of new technology based on the principle of force in modern times.

• 한국건설관리학회논문집
• /
• 제18권6호
• /
• pp.26-37
• /
• 2017

사업초기 단계의 공정업무는 숙련된 전문 인력들의 경험에 의해 비정형화된 자료를 위주로 수행됨에 따라 정확도 높은 계획을 수립하기 위해서는 과다한 비용 및 시간이 소요되기 마련이다. 사업초기 기획단계에서의 공정/원가 기획업무를 보다 효율적으로 수행하기 위해서는 실적자료를 재활용하는 것이 무엇보다 중요하다. 그러나 실적자료의 구조를 완전하게 이해하고 이를 새로운 사업에 적용하는 것은 매우 많은 경험과 지식을 요구한다. 이러한 배경에서, 본 연구에서는 공항사업을 대상으로 사업초기 기획단계에서 경험이 많지 않은 기술자도 쉽게 CPM 공정표 초안을 작성할 수 있는 실적자료 데이터 기반의 기준공기 산정 방법론 및 체계를 제시하였으며, 사례 프로젝트에 적용하여 공정표 초안으로서의 의미 있는 결과를 도출하였다. 제시한 기준공기 산정 방법론 및 산정체계는 실적 및 경험자료를 구조화함으로써 초기단계의 제한된 정보만으로도 CPM activity 및 공기를 자동으로 생성할 수 있으며, 기획단계의 CPM 공정표로서의 신뢰성 및 정확성 향상은 물론 업무부담의 최소화가 가능하다.