• Title/Summary/Keyword: Main Space

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The Evolutionary Statuses of Solar Type Detached Eclipsing Binary Stars

  • Kanjanascul, Chanisa;Bach, Kie-Huon;Hong, Kyeong-Soo;Kim, Sung-Eun;Lee, Jae-Woo;Kang, Young-Woon
    • Journal of Astronomy and Space Sciences
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    • v.29 no.2
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    • pp.131-140
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    • 2012
  • We presented fundamental stellar parameters and evolutionary statuses of six solar type detached eclipsing binaries whose masses are in the range of 0.97-1.43 $M_{\odot}$. EK Cep and FL Lyr belong to the zero age main sequence. HS Hya, IT Cas and CD Tau are on the main sequence. Their ages are 1.3, 1.9 and 2.2 Gyr, respectively. Both component stars of AI Phe evolved to sub giants and its age is 4.0 Gyr. Those ages of the detached binary systems show good agreement with the time scale for synchronization and circularization of the binary systems.

A study on revitalization of riverfront space in terms of ecological aspect (생태적(生態的) 측면(側面)을 고찰(考察)한 하천(河川) 수변공간(水邊空間)의 활성화(活性化) 방안(方案) 연구(硏究))

  • Han, Ju-Hyung;Oh, Deog-Seong
    • KIEAE Journal
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    • v.2 no.1
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    • pp.21-32
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    • 2002
  • This study aims to find out the way of revitalizing of natural riverfront space in terms of ecological aspect. At the first part, theoretical made in terms of concept, planning aspects and techniques which were main bases for the study. It begins by explaining the concept of ecological riverfront space, the main aspect and techniques of its planning. After this, it analysis eight cases(four cases in Korea, Swiss, Germany, America and Japan) in terms of the objects, planning techniques and the results of development. It continues by making detailed analysis according to four objectives like 'protection from flood', 'quality of the river', 'ecological preservation' and 'active usage of riverfront space'. It ends by evaluating the relationship between objectives and the planning which will be adapted to the future development of riverfront space with ecological aspect. In conclusion, hereafter will propose desirable design-direction for revitalization about riverfront space about ecological aspect design in urban.

Chronological Analysis on the Accessibility Change of Outdoor Space in Apartment Complexes in Cheonan City Using Space Syntax (공간구문론을 활용한 천안시 아파트단지 외부공간의 시기별 접근성 변화 분석)

  • Lee, Ki-Seok
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.18 no.12
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    • pp.32-41
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    • 2017
  • This study examined the arrangement attribute of each component based on the relationship among the components using space syntax at the entire complex level when analyzing the outdoor space of an apartment complex in Cheonan and as a preliminary study. The accessibility change in the access space to each space and to the facilities were examined based on a resident walking in the perspective that the outdoor spaces of the apartment complex are one spatial structure connected together. The space was divided into a total of 5 periods and the access space to the facilities and spaces located in outdoor space of the apartment complex were established as the unit space. In this study, a total of 6 analysis items were established: main complex access space, main building access space, shopping mall within complex, control office/center for senior citizens, children's playground, and resident sports facilities. In the analysis, the following conclusion was obtained. First, the accessibility to the main complex access space was high over almost all periods and the main building access space generally showed low accessibility. Second, the shopping mall showed a tendency that the closer the period, the more the accessibility is increased. Third, the control office/center for senior citizens, which can be considered as a common resident space and the children's playground out of the resident sports facilities, showed an exceptional tendency, the integration order was constantly high without a large change by the period and the control office/center for senior citizens showed the tendency for a high integration order, indicating that it is planned mainly in a location with good accessibility.

A Study on The Transformation of Style & Liturgical Space of Catholic Churches in Busan Diocese(I) - Focus on Five Catholic churches in Busan diocese constructed between the end of 19th century and 1962 - (천주교 부산교구 성당건축의 양식과 전례(典禮)공간 변화경향 연구(I) - 19세기 말에서 1962년 사이에 건립된 부산(釜山)교구 5개 주요 성당건축을 중심으로 -)

  • Kweon, Tae-Ill
    • Korean Institute of Interior Design Journal
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    • v.18 no.5
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    • pp.164-174
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    • 2009
  • Since the end of 19th century, The form and inner space for the religious ceremony; liturgical space of Catholic churches in Busan diocese have been changed as various styles by several outer and inner factors. The changing of historical, social, and religious environment, such as Opening Harbor, Japanese Occupation, Korean War & Rehabilitation Period, and Vatican II are generally regarded as main outer factors, and the locality that lay behind the flux of those events is considered as the main inner factor. The former has usually operated as a momentum for showing general trend of Catholic church, while the latter has made local singularity expressed as unusual style and somewhat modified liturgical space compared with Its contemporary churches. In the context, this paper attempt to analyze the transformation process of style and liturgical space of Catholic churches in Busan diocese focused on revealing local singularity with main five churches, Bumil Church, Samrangjin Church, Milyang Church, Jungang Church, and Dongrae Church, constructed between the end of 19th century and 1962.

Dynamic Simulation and Analysis of the Space Shuttle Main Engine with Artificially Injected Faults

  • Cha, Jihyoung;Ha, Chulsu;Koo, Jaye;Ko, Sangho
    • International Journal of Aeronautical and Space Sciences
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    • v.17 no.4
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    • pp.535-550
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    • 2016
  • Securing the safety and the reliability of liquid-propellant rocket engines (LREs) for space vehicles is indispensable as engines consist of many complex components and operate under extremely high energy-dense conditions. Thus, health monitoring has become a mandatory requirement, especially for the reusable LREs that are currently being developed. In this context, a dynamic simulation program based on MATLAB/Simulink was developed in the current research on the Space Shuttle Main Engine (SSME), a partly reusable engine. Then, a series of fault simulations using this program was conducted: at a steady state operating condition (104% Rated Propulsion Level), various simulated fault conditions were artificially injected into the simulation models for the five major valves, the pumps, and the turbines of the SSME. The consequent effects due to each fault were analyzed based on the time responses of the major parameters of the engine. It is believed that this research topic is an essential pre-step for the development of fault detection and diagnosis algorithms for reusable engines in the future.

A study on rhe space use of upper class residence in the Yi dynasty - On the basis of rites of passage - (조선시대 상류 주택의 주거공간 이용에 관한 연구 - 통과의례를 중심으로 -)

  • 김주야
    • Proceeding of Spring/Autumn Annual Conference of KHA
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    • 1992.11a
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    • pp.53-61
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    • 1992
  • This study aims to find out about the traditional life and consciousness of the Yi dynasty used its residence as the place where rites of passage were heid. This study is tuying to classify the rites of passage according to the procedures by which those rituals are being held and to analyze them based upon the space where rituals take place. The results of research and analysis are as follows : 1. The most frequently used area in the house as a variety of ceremonies were held includes SARANGBANG and DAECHUNG belonging to SARANGCHE and ANBANG and DAECHUNG that belong to ANCHE. So naturally these areas are located in the main space of the house. 2. ANMADANG as well as SARANGMADANG was used as the main walkway in the house and as the main place for the ceremonies such as marriage and funenal. MADANG space in the house played a semi-indoor-space fole andperformed the functions which limited indoor space couldu's carry out when ceremonies took place. 3. It seems that SADANG had net been utilized in the daily routine but located within the residence due to the ritualism.

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A Study on the Direction of User Participatory Design for School using Socio-Spatial Network Analysis - Focused on the middle and high school in Seoul - (사회-공간 네트워크 분석을 활용한 학교설계 사용자 참여디자인 방향에 관한 연구 - 서울시 중, 고등학교 사례를 중심으로 -)

  • Shin, Doosik;Cho, Tae-Ho;Jeon, Young-Hoon
    • Journal of the Architectural Institute of Korea Planning & Design
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    • v.35 no.10
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    • pp.19-30
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    • 2019
  • The purpose of this study is to explore ways to efficiently capture the opinions of students who are main users in the planning, planning and design of school facilities. There are many criteria for determining good schools, but in this study, the main purpose of this study was to set up the main users as students, and to analyze the differences between the network and the actual spatial structure (network) created by the hope of students' use of school space, and the direction to overcome the differences. After surveying students' opinions about their satisfaction with school space and their desire to use school space by limiting the survey target to middle and high schools in Seoul, the 'social-space network analysis' was recently established in the social science field. As a result, it was found that the proximity of space and space desired by students in the school varied greatly depending on the geographical conditions, school districts, and the status of the current facilities, and the direction of improvement specialized for each school was found.

A Study on the Evaluation of Pedestrian Environment in the Main Street in Rural Area - Focused on General Town and Base Seat of a Myeon Office of 5 Local Governments in Jeollanam-do - (농촌지역 면소재지 중심가로의 보행환경 평가에 관한 연구 - 전라남도 5개 지자체의 일반읍·거점면소재지를 중심으로 -)

  • Park, Sung-Jin;Gang, In-Ho
    • Journal of the Korean Institute of Rural Architecture
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    • v.22 no.2
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    • pp.26-34
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    • 2020
  • This study is to find a way that improves the pedestrian environment in the main street in rural areas. The main streets of five local governments in Jeollanam-do, general towns and bases seat of a myeon office, were studied. The research results are as follows. First, all three groups under investigation required multi-purpose activities on main street. This is thought to be due to the maintenance of the main street with vehicle-centered maintenance, thereby revising the walking space around essential activities. Second, the simple size of the sidewalk width is not closely related to the safety of pedestrians, and it is judged that the pedestrian space should be maintained considering the size of the floating population, acceptable activities, and proper sidewalk width. Third, the center where pedestrian space and streetscape are maintained has spatial constraints on sidewalks and lanes, so there should be spatial flexibility. Also, it is necessary to find a way to minimize the occupancy of pedestrian roads due to ground parking lots in relation to pedestrian continuity. Fourth, improvement of walking environment should involve community activities other than physical improvement.

Thrice Repair Works and Three Space Conceptions in Seokguram - focusing on Seokguram Architecture and Virtual Space Division of Inside and Outside - (석굴암, 세 번의 수리 공사와 세 개의 공간 개념 - 석굴암 건축과 안팎의 공간 구분을 중심으로 -)

  • Yoon, Chae-Shin
    • Journal of the Architectural Institute of Korea Planning & Design
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    • v.35 no.8
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    • pp.89-100
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    • 2019
  • The purpose of this study is to critically review the repair works of Seokguram architecture and to search for its original form and space. Seokguram's architectural form has been transformed throughout three repair works. The first transformation occurred during the repair work of the Colonial Government in 1913-1915, and the second occurred during the repair work of the Colonial Government in 1920-1923. The repair work done by the Korean Government in 1961-1964 also caused a severe change in the architectural form and space of Seokguram architecture. The more the repair work was added to Seokguram, the more its original form flew away like a mirage. Through the three repair works, the spatial composition of Seokguram changed in the following directions: from ((front chamber + passageway) + main chamber) to (front chamber + (passageway + main chamber)) through the second repair work, from (front chamber + (passageway + main chamber)) to (front chamber + passageway + main chamber) through the last repair work. Although the compositional space hierarchy of Seokguram was maintained during the first repair work, the architectural form based on the dry method was changed to the form based on the wet method. The Korean government's repair work was a tragedy for the 'Seokguram conservation project' that the people who led the conservation process misunderstood the architectural nature of Seokguram.

A note on convexity on linear vector space

  • Hong, Suk-Kang
    • Journal of the Korean Statistical Society
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    • v.1 no.1
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    • pp.18-24
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    • 1973
  • Study on convexity has been improved in many statistical fields, such as linear programming, stochastic inverntory problems and decision theory. In proof of main theorem in Section 3, M. Loeve already proved this theorem with the $r$-th absolute moments on page 160 in [1]. Main consideration is given to prove this theorem using convex theorems with the generalized $t$-th mean when some convex properties hold on a real linear vector space $R_N$, which satisfies all properties of finite dimensional Hilbert space. Throughout this paper $\b{x}_j, \b{y}_j$ where $j = 1,2,......,k,.....,N$, denotes the vectors on $R_N$, and $C_N$ also denotes a subspace of $R_N$.

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