도시 하천의 수질특성에 관한 연구 ( 제1보 ) - 중랑천을 (中浪川) 중심으로 -

한상욱,홍사욱 ( Sang Wook Han,Sa Uk Hong ) 한국하천호수학회 1985 생태와 환경 Vol.18 No.3·4

The Chungryang-stream is one of the tributaries of the Han-river which flows through the north-eastern part of Seoul city which is the largest one in Korea. The total length of the stream is 102.2 kilometers (main stream: 42.2 kilometers, its branch: 60 kilometers) and the study area is about 239 square kilometers with the population of 1.8 million. Major sources of pollution on the stream in study area are both of industrial and domestic waste water, which adversely affect the water quality of the down stream of the Han-river. The water quality measured by BOD_5 of the upstream of Chungryang-stream was about 7.0 milligrams per liter. However passing through the area of the Euijungbu, the water quality measured by BOD_5 was showing high concentration as about 40 milligrams per, liter due to the sewage from the Euijungbu city and the highly polluted water of Paeksuk-stream. No significant seasonal changes in DO concentration are shown in main stream except upstream and the ratio of T. coli/F. coli is 3. 4 in the upstream, 1. 6 in the midstream and 2.3 in the downstream. COD values of sediments range from 3. 0 to 384. 9 milligrams per liter and it is found a wide viriation of the values owing to the rainfall.

외상성 신동맥 색전증 1례

한병규,김욱현,문기혁,송윤섭,박영호 순천향의학연구소 2004 Journal of Soonchunhyang Medical Science Vol.10 No.2

Renal artery thrombosis may result from external trauma of a blunt nature. Such injury is induced by rapid deceleration resulting in the stretching of the renal vasculature, disruption of the arterial intima-the least elastic layer of the arterial wall and eventual thrombosis. The treatment of renal artery thrombosis is controversial, with physician's options divided between prompt surgical exploration with vascular repair and clinical observation. We experienced 1 case of traumatic renal artery thrombosis and report that with a brief review of the literature.

무선 센서 네트워크를 위한 에너지 인식 하이브리드 클러스터링

한욱표,김승남,이제현,정영준 강원대학교 정보통신연구소 2007 정보통신논문지 Vol.11 No.-

Many studies for the efficient utilization of node energy in wireless sensor networks has been done because sensor nodes operate with limited power based on battery. Existing cluster structure has problem that energy consumption is unbalanced because energy consumption is concentrated in cluster head. And in case distribution density of sensor node is low, the energy efficiency is declined because only a few members exist in cluster. In this paper, we submit an hybrid clustering mechanism to construct topology by mixing cluster structure and mesh structure selectively according to distribution of sensor nodes to improve energy efficiency. And we attempt to derive balanced energy consumption by selecting cluster head considering residual energy of each node. The performance of the proposed mechanism has been examined and evaluated with the NS-2 simulator in terms of network lifetime and end-to-end delay.

호텔산업에서 공급사슬관리(SCM)를 통한 물류생산성 증진에 관한 실증연구

한한수,김흥유,임재욱 한국생산성학회 2002 生産性論集 Vol.16 No.3

Recently, Hotels re faced with competitions form other highly upgraded calering business and the increased lobor costs. As one of the methods to solve these difficalties. Stratgic supply could be considered for a hotel business. Actually, SCM(Supply Chain Management) is a theory of a general administion. In recent, a lots of companies over the world have implemented SCM in their supply management and have been succed. Thus, this study is to consider about the possibility if SCM could be used in the hotel business. The survey is enhanced with the staffs who is charge of the purchasing of 60 hotels and analyzed by SPSS 10.0 and AMOS 4.0. This study is only concerned to material supply. But, in the hotel work, it could be also important for service supplies such as order information processing.

무선 센서 네트워크를 위한 효율적인 에너지 인식 라우팅 프로토콜

한욱표,정영준 강원대학교 정보통신연구소 2006 정보통신논문지 Vol.10 No.-

The efficient node-energy utilization in wireless sensor networks has been studied because sensor nodes operate with limited battery power. To extend the lifetime of the wireless sensor networks, we reduced the node energy consumption of the overall network while maintaining all sensors balanced node power use. Since a large number of sensor nodes are densely deployed and cooperated in wireless sensor network, the lifetime extension of a sensor network is maintained by keeping many sensor nodes alive. In this paper, we submit an efficient energy aware routing portocol for wireless sensor networks to increase its lifetime without degrading network performance. The proposed protocol is designed to avoid traffic congestion on specific nodes at data transfer and to make the node power consumption widely distributed to increase the lifetime of the network. The performance of the proposed protocol has been examined and evaluated with the NS-1 simulator in terms of network lifetime and end-to-end delay.

골재생산과 관련한 터널작업에서 효율적인 심빼기 발파공법

임한욱,김재홍,조영동 강원대학교 부설 석재복합신소재 제품연구센터 2000 석재연 논문집 Vol.5 No.-

실린더 컷 심빼기 공법은 일반적으로 터널단면에 관계없이 널리 쓰이는 방법이다. 본 연구에서는 종래의 실린더 컷 공법을 개선한 새로운 방법을 제안하였다. 제안한 방법의 특징은 발파당 굴진장을 증대시킬수 있는데 이를 요약하면 다음과 같다. 발파당 굴진장은 평균 3.8m 이상으로 종래의 심빼기 바법 경우 천공장의 90~95% 인데 비하여 제안한 방법은 천공장의 99.5%까지 가능하다. 또한 비장약량은 1.363에서 1.297 kg/㎥로 약 5%가, 비천공장은 2.393에서 2.130 kg/㎥로 약 8%가 감소되었다. 이외에 발파진동, 비산거리, 파쇄입도면에서도 종래 방법보다 양호함을 확인하였다. The cylindrical cut is most frequently used in tunnelling regardless of their dimensions. In this study the new parallel cut is proposed to raise advance per round, which is considered to be an elevation of the traditional cylinder cuts. The main results of this study are as follows; The average advances per rounds in new cuts can reach 99.5% of drilling length. That of traditional cylinder cuts are known approximately 90~95%; Specific charge weight is approximately reduced 5%(1.363→1.297 kg/㎥); Specific drilling rate is also reduced 8% compared to that of cylinder cut(2.393→2.130 kg/㎥); Vibrations, fly rock, and fragmentation produced by the new blast are to be proved superior to those of the traditional cylinder cuts.

암반굴착에 따른 발파진동과 브레이커진동의 특성에 관한 연구

임한욱,박현성 江原大學校 産業技術硏究所 2002 産業技術硏究 Vol.22 No.A

The blast works for open cuts and underground constructions near urban areas have recently increased complaint of ground vibration, air blast and fly rock. In order to reduce these problems, it is necessary to develop more cautious blasting, or non-blast excavation methods by mechanical power. For these breaker workings instead of blast are sometimes adopted. To compare the characteristics of blast vibration with breaker vibration, the level, range of frequency and spectrum amplifications of each vibration were studied.

터널 발파에서 이완영역 감소를 위한 제어발파 기술 연구

임한욱,이영호 강원대학교 부설 석재복합신소재 제품연구센터 2003 석재연 논문집 Vol.8 No.-

터널, 도로 및 철도 개설시 낙석이나 암반 사면의 미끌림을 방지하고 과다한 보수작업을 피하기 위해서는 굴착시 원지반을 손상시키지 않도록 시공하는게 중요하다. 특히 지질조건이 다른 지층에서 손상영역을 감소시키기 위해서는 세밀한 발파가 신중히 시행되어야한다. 본 연구에서는 손상영역을 평가하기 위하여 발파진동을 계측하였다. 총 37회의 진동을 계측하고 이를 바탕으로 진동 추정식을 도출하였다. 손상영역은 발파진동식과 암반의 물성 특히 인장강도와 탄성파 전파 속도 등으로부터 구할 수 있다. 지발당 장약량 2.1375kg로 심빼기발파를 실시하는 경우 본 연구에서 구한 손상영역은 약 1.23m로 예상된다. In tunneling, road and rail road cuts, it is of the most importance that the remaining rock is of high quality in order to avoid rock falls, rock slides and excessive maintenance work. Carefully executed blasting will minimize the damage zone even in severe geological conditions. In this study, blasting ground vibration monitorings are adopted to estimate damage zone in road tunnel. A total of 37 blasts were recorded and empirical particle velocity equation was obtained. The damage zone can be estimated by relationships between vibration velocity(Ⅴ) and associated tensile stress(o). The damage zone assumes to be 1.23m with explosive(2.1375kg) at center cut in tunnel blasting.

굴착중인 장대터널 내 최적의 환기시스템에 관한 연구

임한욱,오병화 강원대학교 산업기술연구소 2006 産業技術硏究 Vol.26 No.A

To determine the optimum ventilation systems during long tunnel excavation, the velocity vector profile and the contaminant's distribution at working place are studied using 2-D, 3-D numerical analysis. The main results can be summarized as follow; In case of long tunnels, blower-exhaust-mixture types which enable to use soft blast ducts is most appropriate in terms of ventilation and economical efficiency. Of the same ventilation types, ventilation efficiency has a difference according to blast ducts and the distance between fan and working place. The 3-D numerical result shows that arranging blower and exhaust ducts in the right and left corners of the tunnel respectively is effective to discharge contaminant. The result of the real measurement shows that CO concentration can be reduced to below 50 ppm, which is regulation value, as 16-minutes fan operation goes on.

자운천 유역의 강우특성에 의한 하천 탁도 발생에 관한 연구

김종욱,박수진,최한규 江原大學校 産業技術硏究所 2007 産業技術硏究 Vol.27 No.B

This research investigates the turbidity and flow of river for an year, 2005, in order to examine the relation of the generation of turbidity according to the outflow of min water. For this research, the region of Jawoon river where is the area of high land vegetable growing in the upper Soyang Reservoir is selected to observe actual floating materials that generate negative nutrition and turbidity of the Reservoir water and the changes of water quality by raining of each month, In addition, the researcher has conducted statistical inspection methods, such as correlation analysis and regression analysis on strength of raining force, and rain continuance time among the elements affecting the outflow of floating materials.