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.

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.

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 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.

강원도 사북-고한 지역의 석탄광 폐석에 대한 물리적, 역학적 특성 연구

임한욱,정윤영,목진호,김종훈,김재동,신동오 강원대학교 석재복합신소재제품연구센터 1996 석재연 논문집 Vol.1 No.-

석탄광 폐석의 건설용 골재로서 활용 가능성을 검토하기 위하여 폐석의 주요 구성암석인 사암, 사질혈암, 혈암, 탄질혈암을 대상으로 기초물성실험, 역학적 실험 및 골재원 특성 실험을 실시하였다. 시험결과치의 평균값을 기준으로 할 때 사암, 사질혈암, 혈암은 골재로서 활용이 가능하나, 실험치의 분산도가 심하여 활용가능 폐석과 불가능한 폐석이 혼재되 있음을 확인하였다. 반면에 탄질혈암은 골재원 특성이 가능하나 강도등 물성에서는 사용이 곤란한 것으로 판단되었다. 따라서 앞으로 폐석중 활용가능한 사암, 사질혈암 및 혈암을 효율적으로 분급하는 방안과 금번에 실시하지 못한 골재의 알카리 반응시험 등이 추가로 보완되었으면 한다. An experimental program was undertaken to test rock wastes from coal mines, for use as a new source of aggregate. Physical and mechanical properties, required for aggregate materials, of major constituents of rock wastes including sandstones, sandy shales, shales, and coal shales, were measured in the laboratory. Test results showed that the sandstones, sandy shales and shales tested in this study might possibly be used for construction aggregates, the highly scattered test data indicated considerable proportion of unusable rocks. In case of coal shales, the aggregate characteristics were generally adoptable but some physical properties such as rock strength were lower than required. In conclusion, it is suggested that an effective procedure for sorting the rock wastes, and additional tests such as alkali-aggregate reaction should be supplemented.

소단면 터널에서 효율적인 발파 패턴에 관한 연구

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

In underground drilling and blasting, particularly in small headings(generally under 20㎡), the prospects for changes of blast parameters are usually more limited than those employed by large area tunnel(over 20㎡). It is also well known that the consumption of explosives and specific drilling rate for small tunnel areas are exponentially increased also tunnel areas decrease. To confirm above results, some tests for two tunnels(irrigation water tunnel with 6.0㎡ area, electric supplies tunnel with 15.0㎡) are also carried out in this study. As a results, specific drilling rate and specific charge for irrigation water tunnel were decreased from 13.8 to 7.7m/㎥ and from 4.88 to 2.56kg/㎥ respectively. Those for electric supplies tunnel were also decreased from 8.0 to 4.9m/㎥ and from 3.46 to 2.22kg/㎥.

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.

가소성 선형 성형 폭약 국산 시제품에 의한 철골구조물 절단실험연구

임한욱,박근순 江原大學校 産業技術硏究所 2004 産業技術硏究 Vol.24 No.B

The demand for demolition of steel structures is recently increasing in Korea. Most of flexible linear-shaped charges(FLSC) for steel demolition are now imported from foreign countries. Some basic experiments have been studied to determine the optimum parameters of design for domestic development of FLSC. Domestic FLSC were used to check cutting of steel structures and other materials in this study. The result shows that domestic FLSC is very effective to cut steel structures.

암반사면의 효율적인 굴착을 위한 제어발파 기술연구

임한욱 강원대학교 부설 석재복합신소재 제품연구센터 2002 석재연 논문집 Vol.7 No.-

여굴과 원 암반의 손상을 효율적으로 제어, 방지할 수 있는 발파방법을 모색하기 위하여 지난 수 십여년간 많은 연구가 수행되었다. 도로, 철도 건설을 위한 굴착과 터널작업시 원 암반을 잘 보전하는 것이 대단히 중요하다. 왜냐하면 원 암반을 잘 보전함으로서 낙석, 사면의 미끌림, 과다한 보수비의 지출을 막을 수 있기 때문이다. 본 연구에서는 노천발파시 균열대의 형성 범위를 감소하기 위하여 종래의 일반발파법을 수정, 보완하 새로운 공법을 제안하였는데, 그 상세한 설계 내역은 표 4에 제시하였다. 위 두가지 발파방법의 결과를 지반진동계측과 탄성과 굴절법 탐사등을 통하여 서로 비교한 결과 새로운 공법을 채택시 균열층의 발생범위를 종래방법에 비하여 약 50% 감소할 수 있음을 확인하였다. In the last decades, many attempts have been made to find the methods to control overbreak and damage to the remaining rock. In road, railroad cuts and tunneling, it is of the most importance that the remaining rock is of high quality in order to avoid rock fall, rock slides and excessive maintenance work. In this paper, a new modified cautious blasting techniques was suggested to reduce crack zone in surface blasting. The details of the new pattern are well described in Table 4. The results between a new pattern and conventional blasting were also checked by ground vibration measurements and refractive seismic method. The range of crack zone can be reduced about 50% using a new blasting pattern.