• 토지주택연구
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• 제1권1호
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• pp.35-42
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• 2010

하수도관 정비사업 및 정부의 4대강 사업에서 발생되는 준설모래는 대부분 투기 및 매립에 의존하여 처리되고 있다. 이는 준설모래를 적절히 이용하는 관련 재활용 기술의 부족과 기존의 준설모래 생산시스템에서 생산된 준설모래의 높은 흡수율과 미립분 함유량에서 비롯된다. 따라서 본 연구에서는 기존의 준설모래 생산시스템의 문제점을 보완한 최적의 세척선별시스템을 통해, 준설모래 품질개선 성능과 세척선별시스템의 미립분과 유기이물질 제거 성능을 알아보기 위한 연구의 일환으로서, 처리된 준설모래의 기초물성을 평가한 결과, 세척선별시스템을 통해 생산된 준설모래가 흡수율, 0.08 mm체 통과량, 점토덩어리량, 유기이물질 함유량에서 큰 폭의 품질개선효과를 나타냈으며, 본 연구에서 목표로 하는 품질기준인 KS F 2573(콘크리트용 순환골재)과 KS F 2526(콘크리트용 골재) 기준에 모두 만족하는 것으로 나타나 향후 콘크리트용 골재로서의 활용가능성을 확인할 수 있었다.

• 한국도서관정보학회지
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• 제27권
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• pp.171-209
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• 1997

The results of the study can be summarized as follows. The Shu-mu Da-wen was selected and compiled by Zhang Zhi Dong at the end of Qing Dynasty as a reading list for students preparing for the state examination and for the purpose of choosing the best from several versions. Whether it was compiled and edited by Zhang was in dispute. But it is almost certain that Zhang was the main editor because Shu-mu Da-wen showed his political, educational and scientific thoughts and knowledge distinctively. The followings are characteristics of Shu-mu Da-wen being compared with Si-ku Quan-shu Zong-mu Ti-yao. 1. In Jing-bu, the Confucian classics are divided into Zheng-jing Zheng-zhu and 'Lie-chao Jing-zhu Jing-shuo Jing-ben kao-zheng. Zheng-shi lei is divided into Zheng-shi fen he ke ben and Zheng-shi zhu bu biao pu kao-zheng. It is the special sorting method to include Du-ben lei in Jing-bu and Chu xue du-ben in Bie-lu in order to provide first learners for reading order. 2. Shi-bu included Gu-shi newly and Di-li lei is divided into Gu Di-li and Jin di-li in Shi-bu. Tian-wen Suan-fa lei is divided into Zhong-fa and Xi-fa in Zi-bu. Zhang distinguished between old books and contemporary ones to find out the origin and include newly published books in the East and the West. 3. Zhou-Qin zhu-zi is newly added to Zi-pu. In Ji-pu, Bie-ji and Zong-ji are categorized according to their style and period respectively. This show the new sorting method which added classifying system concerning academic development. It is the prominent feature in the compiling system to make Bie-lu and Cong-shu respective chapters. With those characteristics the Shu-mu Da-wen had been edited and published several times. It had a wide effect not only on compiling methods of cataloging afterwards and but also on classification systems before decimal classification was introduced in China.

• 정보처리학회논문지A
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• 제15A권6호
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• pp.325-334
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• 2008

플래시 메모리는 크기가 작고 적은 전력을 사용하며 충격에 강하기 때문에 휴대폰, MP3 플레이어, PDA와 같은 이동 기기에 널리 사용되고 있다. 또한, 노트북과 개인용 컴퓨터에서 사용하던 하드디스크를 플래시 메모리로 교체하려는 시도도 진행되고 있다. 최근에는 플래시 메모리 저장 시스템에서 대용량의 데이터를 효율적으로 검색하기 위한 플래시 메모리용 $B^+$-트리 인덱스를 개발하려는 연구가 이루어지고 있다. 이러한 연구는 $B^+$-트리에 키의 삽입 또는 삭제 시 발생하는 "덮어쓰기"를 최소화하는데 초점을 두고 있다. 그러나 이것뿐만 아니라 하나의 $B^+$-트리 노드에 할당되는 물리적 페이지의 크기도 $B^+$-트리 성능에 영향을 줄 수 있다. 본 논문에서는 다양한 실험을 통해 노드 크기에 따른 $B^+$-트리의 구축 성능, 검색 성능, 그리고 저장 공간 사용량을 비교 및 분석한다. 노드에 키 삽입 시 정렬 및 비정렬 알고리즘을 제시하며, 또한 효율적인 노드 검색을 위한 적절한 인덱스 노드 헤드 구조를 제안한다.

• 동굴
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• 제80호
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• pp.5-9
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• 2007

Ulleungdo and Dokdo is special island to all Korean people, The purpose of this study is to collect, sorting, analysis and rearrangement the photo data. The data collected from the published books and new photos. The quantity of data is so big, that it is necessary to divide the volume to publishing the books. For example, aerial photos(including marine topography), the relief of surface, culture and history, urban and settlement, sightseeing and economy, maps and figure and etc. The effect of the study is clear to the civics and students about patriotic sentiment etc.

• 한국경영과학회:학술대회논문집
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• 대한산업공학회/한국경영과학회 2006년도 춘계공동학술대회 논문집
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• pp.1722-1727
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• 2006

배달할 우편물을 경로에 따라 자동 정렬하는 순로구분기의 연구개발이 완료단계에 있어 이를 현장에 도입하고자 하는 계획이 수립되고 있다. 순로구분기는 우편물 영상 처리, 한글주소 인식, 코드 부여, 구분기 제어 등의 기능이 복합되어 작동되며, 구분 성공률에 따라 자동 순로구분 작업 이후의 추가 수작업의 양이 달라진다. 본 연구에서는 수작업 처리를 고려하여 자동화 효과를 개선하기 위한 방안을 전체 작업소요시간을 중심으로 제시하고 각 방안의 장단점을 비교한다. 먼저 자동화기기를 도입했을 때의 순로구분 작업을 분석한 후, 주소 인식 성능을 보완하는 비디오코딩 작업을 포함하는 경우와 배달점 소그룹까지만 구분(중구분)하는 경우에 대해 분석하여 비교한다. 분석 결과는 향후 순로구분기 도입시의 운영 효과를 높이기 위한 실행방안을 마련할 때 활용될 것이다.

• 한국공작기계학회논문집
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• 제15권3호
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• pp.97-103
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• 2006

The development of a heat exchanger production model based on the microlamination technology and it's economic efficiency is addressed. A microchannel production model is proposed for the high-volume production. The microlamination system is made up of lamina patterning, laminae sorting and laminae bonding. A cost estimation model is developed based on the hewn cycle time and capital equipment costs. An economic efficiency analysis is performed to determine the cost drivers under the different market and product scenarios. The result of the economic efficiency analysis indicated that the device size and the production rate have a great effect on the overall manufacturing cost of microlamination devices. And it can be concluded that the microlamination should focus on bonding larger laminae and reducing both cycle time and warpage.

• Journal of Biosystems Engineering
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• 제18권1호
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• pp.30-36
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• 1993

Cucumbers being living biological materials are generally vulnerable to external forces, especially, bending force during the processes, because they have usually longish shape. Understanding the mechanical and viscoelastic properties of cucumber is important to analyze various characteristics which might be helpful in determining design parameters for the processing equipment such as sorting, packaging and transporting machine. The objectives of this study were to determine ultimate bending strength, deflections, and hysteresis losses for the cucumbers from the bending tests. Within the range of loading rate from 20 to 100mm/min, the ultimate bending strength of the cucumber samples were 525-630kPa at the Gyeousalicheongjang and the Baekdadagi, and 476~618kPa at the Cheongjangmadi, respectively, but the ultimate bending deflection ratio of the Cheongjangmadi showed the highest value among the tested samples. The effect of loading rate on the physical properties of the cucumber was relatively significant, all considered physical properties and degree of elasticity of the cucumber increased with the loading rate, but the hysteresis loss decreased with it.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2021년도 가을 학술논문 발표대회
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• pp.120-121
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• 2021

This study examines the performance of the pre-treatment process system to use CGS, a by-product generated in IGCC, as a concrete fine aggregate for construction materials, on the quality of CGS fine aggregate. As a result of the analysis, it is judged that the quality of fine aggregates of CGS can be improved at both density, absorption rate, and 0.08mm body passage amount after the hydroelectric screening process using water as a medium during the pretreatment process. It is believed that it can be used as basic data for national standard certification of CGS fine aggregates in the future.

• Nutrition Research and Practice
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• 제9권6호
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• pp.586-591
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• 2015

BACKGROUND/OBJECTIVES: Reactive oxygen species (ROS) formation is closely related to miconazole-induced heart dysfunction. Although rhamnetin has antioxidant effects, it remained unknown whether it can protect against miconazole-induced cardiomyocyte apoptosis. Thus, we investigated the effects of rhamnetin on miconazole-stimulated H9c2 cell apoptosis. MATERIALS/METHODS: Cell morphology was observed by inverted microscope and cell viability was determined using a WelCount$^{TM}$ cell proliferation assay kit. Miconazole-induced ROS production was evaluated by fluorescence-activated cell sorting with 6-carboxy-2',7'-dichlorofluoroscein diacetate ($H_2DCF$-DA) stain. Immunoblot analysis was used to determine apurinic/apyrimidinic endonuclease 1 (APE/Ref-1) and cleaved cysteine-aspartic protease (caspase) 3 expression. NADPH oxidase levels were measured using real-time polymerase chain reaction. RESULTS: Miconazole (3 and $10{\mu}M$) induced abnormal morphological changes and cell death in H9c2 cells. Rhamnetin enhanced the viability of miconazole ($3{\mu}M$)-treated cells in a dose-dependent manner. Rhamnetin (1 and $3{\mu}M$) treatment downregulated cleaved caspase 3 and upregulated APE/Ref-1 expression in miconazole-stimulated cells. Additionally, rhamnetin significantly reduced ROS generation. CONCLUSIONS: Our data suggest that rhamnetin may have cytoprotective effects in miconazole-stimulated H9c2 cardiomyocytes via ROS inhibition. This effect most likely occurs through the upregulation of APE/Ref-1 and attenuation of hydrogen peroxide levels.

• 수산해양기술연구
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• 제52권2호
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• pp.88-95
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• 2016

Most grid sorting has been used to sort out flatfish in shrimp fisheries, while double grid systems have been tested to separate smaller shrimp. The escape of juvenile red seabream through separating panels made with steel grids or large mesh tested for masking effects in a two-species system. Fish behavior was observed in a circulating water tank. The escape rate was 20% greater with the separating codends than with the normal codend in the single-species experiments. The rates in the two-species experiments were 30% or 20% greater than the single-species rates for the normal or separating codends, respectively. The seabream retention rates in the grid separator codend decreased as rockfish retention increased, possibly due to a threat effect. Conversely, the retention rate of both species increased concurrently in the net separator, possibly due to a masking effect. The escape rates of juvenile red seabream varied by compartment in the mesh separating codend. These results suggest that grid separating codends can be used in the field as towed fishing gear to reduce juvenile catch.