• Title/Summary/Keyword: Small space

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New Space Response and Industrialization Strategy for Micro & Small Satellites ((초)소형위성의 New Space 대응 및 산업화 전략)

  • Seo, Inho;Jeong, Hyun-Jae
    • Journal of Space Technology and Applications
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    • v.1 no.2
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    • pp.256-267
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    • 2021
  • In this paper, the New Space characteristics and response of micro & small satellite, and space industrialization strategy using domestic technologies are described. Recently, micro & small satellites are developed worldwide, including Starlink, having the characteristics of low-cost, light-weight and satellite constellation. Therefore, it is necessary to prepare for the constellation operation by considering the use of Commercial Off-The-Shelf (COTS) parts, satellite weight, shape and mass production. In particular, it is necessary to develop Multi Input Multi Output (MIMO) technology in consideration of the frequency interference during constellation operation, and to prepare and make efforts to secure frequencies in the government. Among the commercial-grade memories of Samsung Electronics and SK Hynix, the space-grade memory field using radiation tolerant memory and the high reliable packaging and space environment test technology has potential as a space industrialization strategy.

Summary of the engine system research using small jet engines in JAXA

  • Futamura, Hisao;Okai, Keiichi;Koh, Masaharu;Mizuno, Takuya;Yanagi, Ryoji
    • Proceedings of the Korean Society of Propulsion Engineers Conference
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    • 2004.03a
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    • pp.763-767
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    • 2004
  • A possible and practical engine system research method is proposed. Varieties of objectives of the engine component and system technology developments are fulfilled by the small scale rig and engine demonstration. Some research applications of small jet engines in National Aerospace Laboratory of Japan (NAL) are presented together with historical overview.

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SMALL-SCALE GIGABIT VLBI OBSERVATION SYSTEM USING PC (PC를 이용한 소규모 기가비트 VLBI 관측시스템)

  • Oh, Se-Jin;Roh, Duk-Gyoo;Kim, Kwang-Dong;Chung, Hyun-Soo;Je, Do-Heung;Wi, Seog-Oh;Han, Seog-Tae;Kim, Hyun-Goo
    • Publications of The Korean Astronomical Society
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    • v.20 no.1 s.24
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    • pp.125-134
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    • 2005
  • In this paper, we propose a small-scale Gigabit VLBI observing system for the Korean VLBI Network (KVN) under construction. The system consists of high-speed sampler, IP-VLBI board, PC-VSI board, and software correlator. Radio signal received by receiver is sampled by high-speed sample. at 1 Gsps (Gigabit sample per second) rate with 2 bits quantization. The digitized signal is recorded in PC and the software correlator does the cross correlation. IP-VLBI board will be used for the geodesy VLBI observation, while PC-VSI board is for the astronomical VLBI observation. The PC-VSI board adopts the VSI-H (VLBI Standard Interface Hardware). The proposed system is based on commercial PCs and therefore can be built inexpensively.

A Novel Axial Foldable Mechanism for a Segmented Primary Mirror of Space Telescope

  • Thesiya, Dignesh;Srinivas, Arra;Shukla, Piyush
    • Journal of Astronomy and Space Sciences
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    • v.32 no.3
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    • pp.269-279
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    • 2015
  • Future space missions will have larger telescopes in order to look deeper into space while improvising on spatial resolution. The primary mirrors for these telescopes will be so large that using a monolithic mirror will be nearly impossible because of the difficulties associated with its fabrication, transportation, and installation on a launch vehicle. The feasibility of launching these huge mirrors is limited because of their small launch fairing diameter. The aerodynamic shape of the fairing requires a small diameter, but the height of the launch vehicle, which is available for designers to utilize, is larger than the fairing diameter. This paper presents the development of an axial deployment mechanism based on the screw jack principle. The mechanism was designed and developed, and a prototype was constructed in order to demonstrate a lab model.

An Analytical Study on the Circulation of the Small-scale Elderly Care Facilities in JeollaNamdo and Gwangju -Focusing on the Analysis on Spatial Depth and Visible Area- (전라남도.광주광역시 소규모요양시설의 동선분석연구 -공간깊이와 가시영역분석을 중심으로-)

  • Kim, Jeong-Mi;Cho, Ju-Young;Lee, Hyo-Won
    • Journal of The Korea Institute of Healthcare Architecture
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    • v.15 no.1
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    • pp.23-32
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    • 2009
  • Among welfare facilities for the elderly, necessity for the elderly welfare with diverse advantages is rising in the Small-scale Elderly Care Facilities. The government is expecting great demand in the future. However, current the Facilities lack construction plans that consider characteristics of the elderly. Accordingly, 14 case facilities located in JeollaNamdo and Gwangju were selected to comprehensively analyze the circulation of seniors at care facilities by computing spatial depth and visible area variables. As a result of this study, average spatial depth of bathroom, resting room, physical therapy room and dining hall that seniors frequently get in contact with was found to be deep, but visible area appropriate for the function of space was not available. It showed that the circulation for the elderly was deep spatially and long physically, and the spatial rank along circulation which is perceived visually by the admitted the elderly was clear, thus, providing them abundant visual experience supported by high openness as they move from private space to public space. The obtained visibility, however, was observed not to be matched with the function of each space. Since the Small-scale Elderly Care Facilities require various spaces within small surface area, actual functions of each space must be taken into consideration with hierarchical space organization to obtain an environment that stimulates senses such as vision and hearing. In addition, since the circulation of seniors using facilities must consider aging characteristics and delicate care on spatial depth and physical distances, in-depth studies on planning of the circulation in care facilities are deemed necessary.

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Elderly Public Housing in the U.S. - A Study on the Environmental Conditions and Resident Needs - (미국 고령자용 공공임대주택 거주노인들의 주거환경실태 및 요구 - 미조리주 콜럼비아시 사례를 중심으로 -)

  • Park, Jung-A;Kim, Sang-Hee;Yoon, So-Yeon
    • Journal of the Korean housing association
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    • v.20 no.5
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    • pp.41-50
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    • 2009
  • This case study is an effort to provide new knowledge on the U.S. elderly public housing focusing on the residents' perceptions of the environmental conditions. For this study, we conducted a survey using written questionnaires and interviews with 20 residents who rent in Columbia, MO. The recorded interview data was used for final analysis; primary findings are as follows: The residents reported relatively high satisfaction on their overall environmental conditions in the two target public housing, built in 1950s. As the most significant problem, residents perceive the lack of storage space for individual units, Partially attributed to space limitations. In addition, bathroom needs varied dramatically among residents based on their health and whether wheelchairs are used. Therefore, it was found that instead of standardized bathrooms, a customizable configuration for the resident's unique physical condition and accessibility must be considered. The residents also addressed their concerns about security for entrance and foyer areas. Due to the small living areas, they wanted to have available outdoor public space for various social activities. Furthermore, they reported the need for small social gathering areas while friends and family members are visiting them, in addition to their small living units, which average 49.8 sq. ft. each.

Analysis of Space characteristics of Conventional Market in Small Town (소도시 재래시장의 공간분석 - 충남 홍성읍 재래시장을 중심으로 -)

  • Han, Jong-Koo;Park, Tong-So
    • Journal of the Korean Institute of Rural Architecture
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    • v.13 no.4
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    • pp.43-50
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    • 2011
  • Activation of conventional market in small town is important in the reinvigoration of local economy as an economical center. The revitalization of local economy is closely related to the fosterage of conventional market. So the local government is trying to activate the market. However, the projects for the activation of conventional market are mostly centered on the modernization of facilities which is carried out at urban districts. Those facilities-centered plans, being carried out at urban district, lack the consideration of the peculiarities of rural districts and the regional conditions of the conventional market in small towns. And some projects for the modernization of facilities produce negative results. Especially the conventional market in small town shows a spatial structure of a five-day market and a market place and it was influenced by the spatial relationship between the permanent market and periodic market. So analyses on the spatial lay-out and form, store facilities, spatial distribution of types of business, spatial utilization on market place are needed to improve the physical environment of the conventional market. In this context, the study analyzed systematically the space of an old and lagged Hongseong conventional market located in central district of a small town. And It is expected that the results use as a basic data to establish effective space improvement plan for conventional market in small town.

Comparative Study on the Fine Structure of Small Cells in the Space of Disse of Various Animal Livers (각종 동물 간소엽내 Disse강의 소세포에 관한 미세구조적 비교 연구)

  • Hwang, Seung-Jun;Shin, Young-Chul
    • Applied Microscopy
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    • v.22 no.1
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    • pp.15-32
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    • 1992
  • This study was an attempt to investigate and compare the fine structure of small cells in the space of Disse of various animal livers. All animal livers contained small cells with or without lipid droplets and the one with lipid droplet seemed to be more developed and show an abundance of activity in function. The fine structure of the small cells observed in the nonmammals was similar to that of Ito cell in the mammal. The electron density of the small cells was similar to that of other cell types in the same animal liver. The cisternal dilation of rough endoplasmic reticulum and Golgi apparatus was more predominant in the mammalian Ito cells. In the nonmammalian, aquatic vertebrates, however, lysosomes and filaments are much more abundant in the Ito cell and its abundant cytoplasmic processes rich in filaments were usually extended between the parenchymal cells. The disparity in size of organelles and numbers of lipid droplets in the small cells showed a tendency similar to those of other cell types in the same animal. From these results, it is considered that the small cells in the space of Disse is a Ito cell and the Ito cell without lipid droplets differentiates into the one containing lipid droplets according to the characteristics of the different animals respectively, and that the Ito cells in the mammals are more active in metabolic function, while those in the nonmammalian aquatic vertebrates are abundant in support of parenchyme.

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A Study on Space Utilization by Programs of Convention and Exhibition Facilities in Korea - Focusing on convention and exhibition facilities in large cities of Korea - (국내 전시컨벤션 시설의 프로그램에 따른 공간 활용에 관한 연구 - 국내 대도시의 전시컨벤션 시설을 중심으로 -)

  • Park, Tae-Sung
    • Korean Institute of Interior Design Journal
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    • v.22 no.5
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    • pp.284-292
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    • 2013
  • The study performed analysis focusing on specialized convention and exhibition facilities among convention and exhibition facilities in Korea. The procedures and results were as follows: First, by theoretical consideration, meaning and contents of convention and exhibition programs done in convention and exhibition facilities were considered and after that, general characteristics of the programs which were the main of space utilization was derived. Second, considering scale and location, 6 facilities were re-selected for in-depth research from 12 facilities investigated preliminarily. Selected facilities were categorized by scale and through the analysis of programs done in this facilities for the last 1 year, overview and characteristics of utilization for exhibition space, conference space, and multi-purpose space, etc were analyzed. Third, through the case study on the programs, individual characteristics of space utilization by convention and exhibition program were analyzed. From the result of the study, considering the whole, the space utilization of programs was done as conference space rather than exhibition space and the ratio of use as conference space to use as exhibition space was 1.8 in the large facilities, 6.7 and 7.6 in the middle facilities and the small facilities, respectively. In the middle and small facilities, the ratio of use of one room as conference space was very high. In the large facilities, there was no big difference with the ratio 50:50 of the programs involving exhibition to other programs, but in the middle and small facilities, the ratio of the former to the latter was observed over 2.4 and 3.6. This fact indicated that the function of use as promotion and communication space for companies and industrial entities which were the essential purposes became low.

Idea for design of mobile toilets through liquidity space (공간의 유동(流動)화를 통한 이동식 화장실 디자인 제안)

  • Lee, Jung-Eun
    • Proceeding of Spring/Autumn Annual Conference of KHA
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    • 2006.11a
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    • pp.216-219
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    • 2006
  • A change is performed in socially a lot of places by elevations about the quality of life. Most construction balls are created mainly to spaces for an individuality or a specific community, but a space for public convenience is the situation that will gain gradually. While these public space increases, there is a public toilet to an increasing trend too. Think about Cubic Puzzle that it is one total space, and put one function to each Module. The small-scale Cubic space achieves a lot of changes by any energies, and a small-scale space compounds through energies to affect mobile and expansion, and the changed Cubic space does diversification of suitable mobile toilet space configuration to a local need in order to look.

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