• 천문학회보
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• 제42권2호
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• pp.67.2-67.2
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• 2017

Korea Astronomy and Space Science Institute (KASI) plans to develop a coronagraph to measure the coronal electron density, temperature, and speed using four different filters around 400 nm, where strong Fraunhofer lines from the photosphere are scattered by coronal electrons. During the total solar eclipse occurring on August 21 across USA, KASI will organize an expedition team to demonstrate the coronagraph measurement scheme and the instrumental technology. The observation site is in Jackson Hole, Wyoming, USA. We plan to build two coronagraphs without occulter to improve signal to noise ratio. In addition, images of white light corona, wide field background, and all sky are planned to be taken with DSLR cameras. We will present the preliminary results of the expedition.

• 품질경영학회지
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• 제45권3호
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• pp.349-364
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• 2017

Purpose: The purpose of this study is to analyze quality control strengthening pilot project in development stages of weapon systems which ensures zero-defect. In order to achieve that, we propose collaboration support system between related organizations. Methods: First, we analyze how quality control methods has been developed from reviewing the preliminary study in commercial and defense industry. Then, we suggest improvement plans for quality control in defense industry and propose a pilot study which able to improve the recognized problems. Results: The results of this study ensures the participants in defense industry recognize the importance of quality control and form a consensus by sharing a case study. Finally, we propose the standardized work process by utilizing manual and manpower dispatching. Conclusion: As a result, this study clarifies the scope and role of relevant organizations to achieve the defense quality assurance in the total life cycle(TLC). Also, this paper guides the collaboration system between the relevant organization which differs from the commercial industry currently divided into development-production-quality.

• 한국문헌정보학회지
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• 제43권2호
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• pp.193-213
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• 2009

21세기 지식정보사회에서 도서관 및 정보환경의 급격한 변화를 수용하고, 이용자의 정보요구와 행태 변화를 적절히 반영한 도서관 전문 인력의 전문성 강화 및 소양 계발이 절실한 상황이다. 이 연구의 목적은 이러한 사회적 흐름과 인식을 기반으로 사서자격 제도의 개선 방향을 제안하려는 것이다. 이를 위해 현행 우리나라 사서자격제도 관련 설문조사 및 분석을 통해 그 쟁점과 문제점을 살펴보고, 향후 바람직한 사서자격 제도의 개선 방안을 도출하여 중 장기 적용 가능성을 제시하였다.

• International Journal of Aeronautical and Space Sciences
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• 제14권4호
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• pp.356-368
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• 2013

The Korea Aerospace Research Institute plans to launch a lunar module by 2025, and so is carrying out a preliminary study. Landing stability on the lunar surface is a key design factor of a lunar module. In this paper, a 1/6 scale model of a lunar module is investigated, for its landing stability on non-level surfaces. The lunar module has four tripod legs, with aluminum honeycomb shock absorbers in each leg strut. ADAMS$^{TM}$, the most widely used multi-body dynamics and motion analysis software, is used to simulate the module's lunar landing. Three types of dampers in the struts (rigid, viscous, and aluminum honeycomb dampers), and two types of lunar surfaces (rigid and elastic) are considered. The Sforce function is adopted, to model the aluminum honeycomb dampers. Details on the modeling and analysis of the landing stability of the 1/6 scale lunar module and the simulation results are provided in this paper.

• Nuclear Engineering and Technology
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• 제37권3호
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• pp.279-286
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• 2005

A prototype of a relativistic proton generation system, based on laser-induced plasma interaction, has been designed and fabricated. The system is composed of three major parts: a fs TW laser; a target chamber, including targets and controls; and a diagnostic system for charged particles and lasers. An Offner-type pulse stretcher for chirped pulse amplification (CPA) and eight pass pre-amplifier are installed. The main amplifier will be integrated with a new pumping laser. The design values of the laser at the first stage are 1 TW in power and 50 fs in pulse duration. We expect to generate protons with their maximum energy of approximately 3 MeV and the flux of at least $10^6$ per pulse using a 10 $\mu$m Al target. A prototype target chamber with eight 8-inch flanges, including target mounts, has been designed and fabricated. For laser diagnostics, an adaptive optics based on the Shack-Hartmann type, beam monitoring, and alignment system are all under development. For a charged particle, CR-39 detectors, a Thomson parabola spectrometer, and Si charged-particle detectors will be used for the density profile and energy spectrum. In this paper, we present the preliminary design for laser-induced proton generation. We also present plans for future work, as well as theoretical simulations.

• 한국건설관리학회:학술대회논문집
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• 한국건설관리학회 2008년도 정기학술발표대회 논문집
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• pp.212-215
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• 2008

건축공사의 공사비 절감은 시공단계보다 사업초기단계 및 설계단계에서 정확한 공사비 예측을 함으로써 더욱 효율적으로 절감될 수 있다. 하지만 현행 공공 건설공사의 공사비 산정 및 관리는 실시설계 이후로 집중되어 있어, 계산견적을 중심으로 실시되는 기획 및 기본설계단계에서의 사업비관리는 매우 취약하다고 볼 수 있다. 이에 본 연구에서는 현행 공사비 산정 방법의 문제점 및 실적공사비 사례정보 분석하여 기본설계단계에서 구체적 비용 계획을 세우고 이에 부합되는 설계가 진행되는지 검토 가능한 공사비 산정모델 개발을 위한 예비적 연구를 수행하였다.

• 교육시설 논문지
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• 제27권2호
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• pp.3-13
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• 2020

The purpose of this study was to analyze the factors negatively affecting college life, to investigate the perception gap between housing types, and to generate preliminary data for increasing residential satisfaction of students who live in temporary housing(e.g., dormitory or one-room). The utilized research methods included a questionnaire survey and an in-depth interview. The college students, especially from other regions, experienced more financial difficulties than others. They managed their tuition and living expense/allowance by parents supports and other sources(e.g., scholarship, arbeit, work in college, loan etc.). The reasons to choose dormitory, as temporary housing, were short distance to college and low costs. In case of one room, independent life was main reason to choose. Gender differences affected to the decision, moving away from present temporary housing. For example, male students preferred an independent life and a short commuting distance, while female students preferred an independent life and a safe life. Thus, considering the origin and gender differences of residents, dormitory planning needed to develop plans allowing independent life and to choose appropriate site for the purpose. In case of planning one room apartment, concerns for safety and landscape were more important than other factors.

• 의료ㆍ복지 건축 : 한국의료복지건축학회 논문집
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• 제20권1호
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• pp.27-34
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• 2014

Purpose: The purpose of this study was to identify the role of the physical environment in task interruptions in the healthcare settings. Many dangerous events such as airplane crash and medical errors are the result of human errors and, these errors are often the result of interruptions during a critical task of professional workers. In fact, the physical environment that determines accessibility and visibility among people affects interruptions significantly, but architectural studies have given little attention to the management of interruptions. Methods: Therefore, the researcher reviewed research literature in other fields to find out how the physical environment affected interruptions. Many studies were from management, human factors, and health care, but few from architecture. First the author examined the impact of interruptions, second described the social context of interruptions and the role of the physical environment. Results: Findings included that description of the physical environment was not very clear in studies from management and human factors, while little work had been done on interruptions in architecture. The author proposed study design that compensated shortcomings of each field by combining approaches from management, human factors, and architecture. Implications: Unit design strategies such as distributed nurse stations can affect interruptions and layout analysis such as space syntax analysis can evaluate visibility and accessibility of floor plans in the preliminary design phase.

• 한국지진공학회:학술대회논문집
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• 한국지진공학회 2006년도 학술발표회 논문집
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• pp.56-63
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• 2006

Facilities of 76skV Substation(S/S) play an important role in electric power supply grids. Various power facilities of 765kV S/S might be damaged enormously if a strong earthquake occurs. In an effort to mitigate possible earthquake disasters, KEPRI (Korea Electric Power Research Institute) set forth plans to verify seismic safety of the facilities of 765kV S/S. To accomplish the task, an earthquake monitoring systems is constructed at four 765kV S/S sites(Shin-AnSung, Shin-TaeBaek, Shin-SeoSan and Shin-GaPyung). Data from these earthquake monitoring stations are being transmitted via satellite communication. Currently, KEPRI is operating an earthquake monitoring system in freefield of Shin-SeoSan S/S (NSS) tentatively, Also, the data from NSS is preliminarily analyzed using the horizontal to vertical (H/V) spectrum ratio method. The method of H/V spectrum ratio has been used to infer site amplification without previous knowledge of near surface geology. The results of data analysis shorts good S/N ratio and amplification of 20-25 Hz by site effect. In the near future, the accumulated data is expected to provide a basis for assessing and predicting any damages to integrity of 765kV S/S facilities by earthquakes.

• 한국식생활문화학회지
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• 제34권5호
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• pp.577-586
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• 2019

The Ministry of Agriculture, Food and Rural Affairs has conducted the Dietary Education Projects at Childcare Centers since 2015. This study provides preliminary data for early childhood dietary education programs, by evaluating the outcomes of the projects. This survey enrolled 212 participants whose children had participated in the projects, and 142 non-participants. Comparing the perception of importance towards each educational program of the projects, dietary education program gained significantly higher importance than other subjects included, and was significantly higher in the participants than in non-participants. In the preference for food group survey for children, vegetable and seaweed preferences were higher among participants than non-participants, indicating that participation in the dietary education projects contribute towards increase in preferences for vegetables and seaweed, which children generally dislike. No significant differences were observed in children's dietary habits between participant and non-participant groups, thereby suggesting that the education projects were insufficient for inducing dietary habit changes. In order to accomplish effective improvement of dietary habits, the education projects need further improvements to achieve systematic and long-term plans.