전단-스팬비가 작은 고강도 철근콘크리트 보의 진단성능

장일영,최광진,송재호 金烏工科大學校 1993 論文集 Vol.14 No.-

This paper is an experimental study on shear capacity of the high strength R/C beams with a shear span-depth ratio between 1.5 and 2.5 A total of 15 beams was tested to determine diagonal cracking and ultimate shear strength. The major variable are shear span-depth ratio(a/d=1.5, 2.0, 2.5), vertical shear reinforcement ratio?? and concrete compressive strength??. Test results indicate that ACI 318-89 Eq(11-31) generally underestimates shear strength carried by vertical shear reinforcements, and the mode of failure may change from shear tension to shear compression for the beams having higher Vs than 75%, thus the effectiveness of r fy on ultimate shear strength(Vu) decreased.

SBNR process에서 암모니아 부하가 N₂O 발생에 미치는 영향

장광언,장현섭,황선진 경희대학교 2004 環境硏究 論文集 Vol.13 No.-

A laboratory scale BNR reactor was built to study the fate of N₂O production during BBNR(Bhortcut Biological' Nitrogen Removal. process and A/O process. Nitrous oxide(N₂O) is emitted from wastewater treatment processes. It is known as a greenhouse gas that contributes to global warming. Therefore it is importance to develop technology, that can suppress N₂O emission. Especially, N₂O emission' from the SBNR process was higher than that of A/O process. When a ono loading was increased(0.15 ∼ 0.6g/㎥day), dissolved N₂O concentration of nitrification was increased. And when nitrite concentration of aerobic basin was increased(0 ∼200 mg/L). N₂O emission rate was increased. As a results of this study, BURN process had an more effect on N₂O emission than A/O process.

VBNC Campylobacter jejuni의 회복특성

장금일,손진영,이희봉,김광엽 忠北大學校 農業科學硏究所 2003 農業科學硏究 Vol.20 No.-

We studied the characteristics of the recovery process where the coccoid (Viable but non-culturable, VBNC) form Campylobacter jejuni which was inactivated under aerobic condition with lower temperature (4 and 25 C jejuni ATCC 43429 strain did not recovered from VBNC form to active spiral form at 4 and 25, whereas C jejuni ATCC 33291 strain recoveredfro VBNC form at 25 Morphology and the fatty acid pattern of cell membrane of VBNC C. jejuni ATCC 33291 and ATCC 43429 were analyzed. The morphological differences between two C jejuni strains were verified using flow cytometry. C16 0(palmiticacid) and C19 0(cyclic fatty acid) showed decrease in the fatty acid composition of C. jejuni ATCC 33291 On the other hand, C19 0 in the fatty acid composition of C jejuni ATCC 43429 was increased and C14:1(myristoleic acid) was found only in C jejuni ATCC 43429 The differences in the fatty acid composition of C jejuni could be possibly related with the recovery of VBNC form C jejuni

植物凝集素 Trichosanthes kirilowii Max.로 分類된 사람 血淸型에 관한 硏究

張光鍾,文國鎭 고려대학교 의과대학 1988 고려대 의대 잡지 Vol.25 No.1

There has been a lot of research works on phytagglutinin (PHA) reported by many investigators. Recently, the utilization of PHA in the medical or medicolegal field is increasing, especially as a lectin for the blood grouping, a mitogen for the artificial culture of human cells and a determinant of the receptor specificity of various tumor cells. Also, some reports should be asserted that the classification of new blood or serum type could be possible not only by use of type-specific PHA's, but also by use of pan-PHA's to human or animal red blood cells. In order to study the serological nature of Trichosanthes Kirilowii Max. extract, the author carried out agglutination-inhibiting reaction of the extract of Trichosanthes Kirilowii Max. to animal red blood cells such as dog, rat and mouse, then 3032 human sera were tried to classify with its agglutination inhibiting property to dog, rat and mouse red blood cells. The results could be summarized as follows: 1. According to agglutination reaction of dog, rat and mouse red blood cells with human sera, each human sera could be classified into two groups, one being positive and the other negative. Their serum types are independent of each other. 2. Human sera also could be classfied by the agglutination-inhibiting property of human sera to Trichosanthes Kirilowii Max. extract with dog, rat and mouse red blood cells. Their serum types are independent of each other. 3. There might be an indissoluble connection between serum types being classified by agglutination reaction of human sera and agglutination-inhibiting property to Trichosanthes Kirilowii Max. extract with dog, rat and mouse red blood cells. 4. Human serum 쇼pe could be classified into 12 groups by use of agglutination-inhibiting property to Trichosanthes Kirilowii Max. extract with animal red blood cells such as dog, rat and mouse, and agglutination property of human sera.

Global-MAHN에서 라우팅 오버헤드 개선에 대한 연구

張良根,金玄旭,李光培,吳世德,裵振勝,金在浩 明知大學校 産業技術硏究所 2007 産業技術硏究所論文集 Vol.26 No.-

In this Paper, we studied the mechanism that increases the network reliability and decreases network load in GMAHN environment based on the AODV routing protocol. This proposed algorithm is the research on the algorithm, minimizing network overhead by preventing unnecessary network overhead previously and adapting Local repair mechanism to efficient data transmission when route error happens in network, in GMAHN environment. To evaluate the proposed algorithm's performance, we analyzed the proposed algorithm and adapting in various experiment environment according to 5 experiment viewpoint such as node movement, gateway network zone, mobile node number, flow number. After evaluating the experiment, we confirmed better network improvement altogether through following result such as total average data reception rate's increase, average data transmission time's decrease, network overhead's decrease than existing GMAHN algorithm.

단축질소제거공정에서의 C/N비에 따른 N₂O발생 특성에 대한 연구

장광언,황선진,장현섭 경희대학교 2003 環境硏究 論文集 Vol.12 No.-

Nitrous oxide(N₂O) is produced as by-production of nitrogen removal system from wastewater and associated with many parameter(such as DO, pH, Temperature, C/N ratio, accumulation of nitrite etc...). Especially SBNR (Shortcut Biological Nitrogen Removal) process have high potential of N₂0 production, but research about this relationship is insufficient. Ammonia concentration of Influent was 600 ppm and 2 sets of reactor (for A/O process and SBNR process) were used. Based on the results of this study A/O process (conventional nitrification and denitrification) was effected by C/N ratio but SBNR process did not. And N₂O production of BSNR oxic tank was observed constantly.

우리 나라 무역업체의 인터넷 무역거래알선사이트의 활성화방안

장면진,윤광운 한국통상정보학회 2000 통상정보연구 Vol.2 No.2

무역거래의 패턴이 최근 크게 변화하고 있는데, 기존 무역거래방식에서 인터넷무역방식으로 그 비중이 확대되면서 인터넷 무역거래알선사이트에 관한 관심과 활용도가 점차 높아지고 있으며 특히 무역거래알선사이트의 구축 및 운영은 국내외의 무역 유관기관과 지방자치단체, 대기업 종합무역상사 및 개별기업을 중심으로 활발히 진행되고 있다. 이에 실제 우리 나라 무역업체들의 사이트 이용 및 현황과 이용만족도 조사를 위해 설문조사를 한 결과, 현재까지 무역업체들이 가장 선호하는 사이트는 무역 유관기관이 운영하는 사이트들이다. 또한 실제 무역거래알선사이트를 이용한 결과와 관련하여 거래알선사이트 제공서비스에 대한 만족은 대상 업체 중 불과 17.9%의 낮은 수준으로서 이렇듯 낮은 만족도를 보이는데는 다음과 같은 문제점들이 있었다. 즉, 정보 인프라 측면에서의 관련정책의 분산, 보안 인프라의 우려, 오프라인 상의 결제 및 세금문제, 인터넷무역 관련 국제협력문제 등을 들 수 있으며, 무역업체의 측면에서는 전문인력의 부족, 최고경영자의 정보화 인프라에 대한 마인드 부족과 업체내의 웹 기반 환경 구축 미흡 등을 들 수 있다. 이상의 문제점들을 개선하기 위한 활성화방안을 살펴보면 첫째, 거래정보 보호기술의 육성 둘째, 무역거래알선사이트의 적극적인 국내외 홍보 셋째, 무역거래알선사이트 관련 분쟁 ·신용조회 등의 통합관리 넷째, 사이트관련 온라인과 오프라인상의 제반환경 개선 및 국제거래 규약 개선 다섯째, 무역거래알선시스템의 효율성제고를 위한 전문인력 양성 및 교육훈련강화 등이 절실히 요망되고 있다.

설악산 국립공원의 어류분포

장민호,조가익,하진용,정광석,박성배,주기재 한국어류학회 2002 韓國魚類學會誌 Vol.14 No.4

설악산 국립공원지역 산간계류의 17개 지점에서 2000년 6월부터 2001년 6월까지 어류상 및 이화학적 요인을 계절별로 총 4회에 걸쳐 분석하였다. 모든 조사지점은 1~3차의 하천으로 비교적 물리·화학적 교란이 적었으며 하천폭은 5~30 m 정도였다. 채집된 어류는 총 18과 42종 2,557개체였고, Cyprinidae는 16종으로 84.7%의 상대풍부도를 나타냈으며, Gobiidae 4종, 5.0?의 상대풍부도를 보였다. Cyprinidae는 전체 채입종의 37.2%를 나타냈다. 우점종은 Zacco temminck로 10개 지점에서 738개체가 채집되어 28.9%의 상대풍부도를 나타냈으며, 아우점종은 Rhynchocypris kumkangensis와 Z. platypus로 각각 4개 지점 648개체(25.3%)와 7개 지점 344개체(13.5%)로 나타났다. 한국고유종(Korean endemic species)은 모두 4과 11종 781개체로 30.5%의 상대풍부도를 나타냈으며, 고유화 빈도는 25.6%로 한국의 평균 고유화 빈도와 유사하게 나타났다. 본 조사에서 외래어는 채집되지 않았다. 국립공원 내에 서식하는 어류의 다양성 유지와 회복을 위해서는 공원 내는 물론 경계지역 하천의 체계적인 관리가 요구된다. The fish fauna of mountain streams in the Seorak National Park area was investigated from June 2000 to June 2001 (4 times). All 17 sites were relatively undisturbed 1st to 3rd order streams. A total of 2,557 individuals were collected and classified into 17 families and 43 species. Cyprinidae accounted for 37.2% (16 species) of the total fish species and 84.7% (2,165 ind.) of the total abundance. Subdominant families were Gobiidae (4 species, 5.0%) and Balitoridae (3 species, 3.4%). Zacco temmincki (RA 28.9%, 10 sites) dominated. Subdominant species were Rhynchocypris kumkangensis (25.3%, 4 sites) and Zacco platypus (13.5%, 7 sites). Eleven of the species are endemic to Korea (4 families, 30.5%). Exotic species were not collected in this survey. Fish diversity was higher in streams around the boundary area than in the national park. Therefore, management of streams in the boundary area to protect the fish biodiversity can be efficiently conducted. Habitat degradation should be reduced for the conservation and restoration of fish diversity.

NY Brine 용액과 염화칼슘용액과의 성능계수 비교 연구

장광진 忠州大學校 1999 한국교통대학교 논문집 Vol.34 No.1

Brine, as a secondary refrigerant, is a heat medium which transmits heat as a from of sensible heat, brine has widely been used in ice manufactories, air conditioning, and other of industry. However, the corrosion by contacting the existing brine solution with refrigeration parts hs been the cause of reducing the life span of refrigeration system. Accordingly, the problem of this corrosion has been the task to be solved, and the problem was broken by the appearance of NY brine manufactured in japan. This paper studied on the properties of NY brine and cacl₂brines by comparing them through experiments.

내연 기관의 연소실 압력 측정을 위한 자료 취득 장치의 개발

전광민,최세진,장원준 연세대학교 산업기술연구소 1990 논문집 Vol.22 No.2

This paper describes the development procedure of the data acquistion system that is user oriented. This high-speed data acquistion system can measure the normal cylinder pressure and the pressure wave caused by the knock occurence. YEDAS, the developed data acquisition system for the cylinder pressure measurement, can take about 200 cycles of the engine cylinder pressures continuously at 3000rpm. Also, YEDAS can take 16 channels of temperature measurement and can control the throttle plate. The maximum speed of the data acqusition is up to 150kHz.