• 한국기술혁신학회:학술대회논문집
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• 한국기술혁신학회 2003년도 추계학술대회
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• pp.359-368
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• 2003

21세기를 맞이하면서, 국제 원자력계는 원자력의 새로운 방향을 활발하게 모색하였고, 새로운 방향의 하나로서 혁신 개념의 원자로 개발이 필요하다는 데에 공통된 인식을 형성하고 있었다. 혁신 원자로 개발의 효과적 달성을 위하여 미국과 유럽, 일본 등과 우리나라를 포함한 원자력 선진국들은 에너지안정공급 능력이 우수하고 국민수용이 가능하며 절대 안전성의 확보 및 경제적으로 경쟁력이 우수한 원자력시스템 개발을 위한 노력을 활발하게 진행하고 있다. 본 연구에서는 미래형 혁신 원자력시스템의 기술 목표를 제4세대 원자력시스템을 기준으로 살펴보고, 현재 국제 공동연구로 개발을 추진 중인 제4세대 원자력시스템의 기술적 특성에 대하여 기술하였다.

• Applied Microscopy
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• 제39권1호
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• pp.79-83
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• 2009

We report a useful method to estimate the electron dose rate which may be a decisive factor to characterize sample properties. Even though most mircoscopes have their own exposure meters, there are several practical concerns when such exposure meters are used to measure the electron dose rate: 1) Specimen should be avoided within the entire area of exposure meter; 2) beam current has to be always recorded whenever the operation mode is changed; 3) the electron dose rate can not be calculated for the beam current beyond the detectable range. To overcome these limitations, we suggest a useful method which utilize a CCD (charge coupled device) camera which is now a popular detector to obtain the final electron micrographs. We have evaluated the CCD sensitivity using the linear relationship between electron current on the exposure meter and counter ratio on the CCD camera which are built in KBSI-HVEM (high voltage electron microscope). Applying the new method, we obtained the CCD sensitivity which are approximately 0.039 counts/$e^-$ and 1.37 counts/$e^-$ for the Top-TV and the HV-GIF CCD cameras, respectively.

• 인터넷정보학회논문지
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• 제2권2호
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• pp.1-9
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• 2001

인터넷 전자상거래 기술의 발달에 따라 인터넷 경매 시장이 급속히 성장하고 있다. 인터넷 경매를 위하여 사용자는 수시로 경매 사이트를 방문하고, 경매정보를 모니터링하며, 또한 최종 가격을 평가하려고 시도한다. 그러나 사용자가 이차 같은 일들을 수작업으로 수행하는 것은 너무 비효율적이었다. 본 논문에서는 실시간 경매에서 비교 정보 검색과 사례 베이스 검색을 위한 에이전트 시스템 RAMAS(Real-Time Auction Information Monitoring Agent System)를 구현하였다. RAMAS는 사용자에게 여러 경매 사이트로부터 실시간으로 경매 정보를 제공하며, 사례 베이스로부터 적절한 가격정보도 제공하게 된다. 본 시스템을 이용하면 판매자와 구매자는 실시간 경매정도와 적절한 가격정보를 얻을 수 있다 따라서 그들은 부당한 손실 없이, 보다 효율적으로 적절한 가격에 도달할 수 있다.

• 한국동물학회지
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• 제38권2호
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• pp.167-176
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• 1995

Glucose-regulated proteins (grp's), srp94 3nd grp78/BiP, are a group of stress proteins which are highly synthesized in cells exposed to a variety of stressful agents including tunicamycin 3nd Ca2+ ionophore. Grp78/BiP is hon to function as a molecular chaperone which regulates the folding and assembly of secretory or membrane proteins, but the biological function of grp941 remains to be elucidated. In this study, we have examined the intracellular distribution of grV's and the function of srp94. Grp's are resident in the endoplasmic reticulum (ERI 3nd a specific sequence (Lys-Asp-Glu-Leu) at their C-terminus is known to be responsible for their retention within the ER. However, it has been unclear whether upon disturbance of cellular Caa+ homeostasis by the Ca2+ ionophore, grp94 is retained within the ER or secreted into the medium. In this study, we showed that in the presence of C3a+ ionophore, grp94 and gif78/BiP are present in the cells, mainly within the ER. We have also investigated whether grp94 might function as a molecular chaperone. Here we showed that in the immunoglobulin (Ig)-secreting hvbridom3 cells, grp94 transientlY interacts with fully glycosylated Is heavy chain, suggesting that grpg94 may be involved in facilitating the folding and assembly of Ig heavy chains.

• Nuclear Engineering and Technology
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• 제40권2호
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• pp.139-146
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• 2008

This paper presents two of the fuel channel designs being considered for the CANDU-SCWR, a pressure-tube type supercritical water cooled reactor. The first is an insulated pressure tube design. The pressure tube is thermally insulated from the hot coolant by a porous ceramic insulator. Each pressure tube is in direct contact with the moderator, which operates at an average temperature of about $80^{\circ}C$. The low temperature allows zirconium alloys to be used. A perforated metal liner protects the insulator from being damaged by the fuel bundles and erosion by the coolant. The coolant pressure is transmitted through the perforated metal liner and insulator and applied directly to the pressure tube. The second is a re-entrant design. The fuel channel consists of two concentric tubes, and a calandria tube that separates them from the moderator. The coolant enters between the annulus of the two concentric fuel channel tubes, then exits the fuel channel through the inner tube, where the fuel bundles reside. The outer tube bears the coolant pressure and its temperature will be the same as the coolant inlet temperature, ${\sim}350^{\circ}C$. Advantages and disadvantages of these designs and the material requirements are discussed.

• Nuclear Engineering and Technology
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• 제54권9호
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• pp.3324-3335
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• 2022

Several countries show interest in the Generation-IV power reactor innovative small module (PRISM), including: Canada, Japan, Korea, Saudi Arabia and the United Kingdom. Generation IV International Forum (GIF) has recommended the utilizing of probabilistic safety assessment (PSA) in evaluating the safety of Generation-IV reactors. This paper reviews the PSA performed for PRISM using SAPHIRE 7.27 code. This work shows that the core damage frequency (CDF) of PRISM for a single module is estimated by 8.5E-8/year which is lower than the Generation-IV target that is 1E-6 core damage per year. The social risk of PRISM (likelihood of latent cancer fatality) with evacuation is estimated by 9.0E-12/year which is much lower than the basic safety objective (BSO) that is 1E-7/year. The social risk without evacuation is estimated by 1.2E- 11/year which is also much lower than the BSO. For the individual risk (likelihood of prompt fatality), it is concluded that it can be considered negligible with evacuation (1.0E-13/year). Assuming no evacuation, the individual risk is 2.7E-10/year which is again much lower than the BSO. In comparison with other PSAs performed for similar sodium fast reactors (SFRs), it shows that PRISM concept has the lowest CDF.

• 한국간호교육학회지
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• 제14권2호
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• pp.305-314
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• 2008

Purpose: The purpose of the study was to examine whether anthropometric estimations can be reliable methods to assess body fat of university students, by identifying the relationship between anthropometric estimates, which have been thought to be not reliable but economic, and Bio-electric impedance analysis (BIA), which has been known to be reliable but expensive. Method: Twenty-one male and 20 female university students were recruited. The in Body 3.0 scale and GIF-891DX were used for BIA. Body fat was estimated with 12 circumferences, 9 skin-fold thicknesses (SFT), and applying 4 equations (Kim's, $Broz{\check{e}}k's$, Siri's and Wilmore's). Their relationships were examined by Pearson Correlation. Result: 11 circumferences and 9 SFT in the male while 5 circumferences and 3 SFT in the female correlated with the body fat on BIA(p<05). The waist circumference had the strongest correlation to the BIA in both males and females. The abdomonial SFT for the male and scapular SFT for the female had the strongest relationship of SFT to BIA. Body fat estimated from more than two different equations significantly correlated with those measured from BIA (p<.05). Conclusion: Anthropometric estimations could be a useful method to get reliable and valid data for body fat of the university students inexpensively.

• 대한전자공학회논문지
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• 제22권1호
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• pp.68-74
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• 1985

이 논문에서는 standard cell의 layout을 위한 doglegging을 하지 않는 channel 배선 시스템에 대하여 서술할 것이다. 이 시스템은 주어진 net list specification을 만족시키기 위하여, 각각 standard cell 의 직선 배열 결합인 두 row 사이의 구평 track에서 이층의 최종 배선 패턴을 만들어 준다. 이 논문에서 사용한 CMOS cell library는 9개의 기본 cell을 가지고 있으며, Mead-Cogway 방식에서의 A-2micron을 사용하여 CIF(Caltech Intermediate From) 형태로 표현되었다. Component library에는 각 cell 내의 pin들의 이름. 위치 및 layer type 등의 입출력 port 특성이 저장되어서, CROUT라는 channel routing program에서 입력 자료로 사용된다. 또 다른 program NETPLOT은 routing 결과를 개략적으로 도시하여 주며, NETCIF에서는 최종의 자세한 layout을 CIF file로 만들어 주고 있다. 기본 cell을 이온하여 set/reset이 있는 dynamic Raster-slave형 D flip-flop에 대한 channel routing의 경우 VAX l1/780 에서 4초의 CPU 시간이 소요되었다.

• 디지털콘텐츠학회 논문지
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• 제17권6호
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• pp.523-529
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• 2016

스테레오 매칭 알고리즘은 컴퓨터 비전과 사진촬영에 필수적인 알고리즘으로 정확도와 복잡도는 스테레오 매칭 알고리즘의 주요 문제점이었다. 그 중에서도 복잡도가 높은 문제점을 극복하기 위해 비용 볼륨 필터링을 기반한 스테레오 매칭 알고리즘에 대한 많은 연구가 이루어졌다. 지역 스테레오 매칭 기술인 유도 영상 필터링 기술은 O(N)의 복잡도를 가지고 있지만, 여전히 실시간 3D 비디오 서비스를 제공하기에는 계산량이 많은 편이다. 따라서 본 논문에서 고속 유도 영상 필터링에 기반한 스테레오 매칭 알고리즘을 제안한다. 고속 유도 필터링은 서브샘플 비율 $\small{s}$에 따라 복잡도 $O(N/\small{s}^2)$을 가지는 알고리즘이다. 제안하는 알고리즘은 효과적인 스테레오 알고리즘을 성능을 보여줌과 동시에 3D 서비스를 위한 빠른 실행 시간을 보여준다.

• 패션비즈니스
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• 제24권1호
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• pp.75-87
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• 2020

The purpose of this study is to find trends in new media fashion content by analyzing the fashion content of the official Instagram accounts of domestic fashion magazines that are being transformed by digital media. The framework for these analysis of fashion content type and methods of production is based on one used in an earlier research project. Empirical analysis is conducted on Vogue Korea's official Instagram accounts, using the highest number of major views as the secondary measure of interest. After screening for fashion content in posts on the Vogue Korea account for four months, 291 short video postings were extracted to analyze the number of views the postings received. The results were categorized as 'star', 'show/exhibition', 'product', 'shop', 'fashion film', 'designer', or 'event', included in the data are the number of postings by type and the number of views by post. Based on the characteristics of the creator and the editing, the posts were classified into 'professional production highlight', 'professional production private', 'UCC' or 'GIF' videos, the number of views per post were also collected. The research results show different levels of interest depending on the type of fashion content, and also on the way the videos were produced. The study also investigated how the combination of these two factors affects interest. When producing a new media fashion content, combining a 'star' type post with 'professional production private' video content was most popular. The selection of production method is therefore important even given the same type of content.