GPS/INS를 활용한 항공 정사영상 제작에 관한 연구

박병욱,이창재,서상일 한경대학교 2008 論文集 Vol.40 No.-

In this study we took the aerial photos scaled 1:5,000 with aircraft equipped GPS/INS. DEM was generated by automatic image matching method using the exterior orientation parameters obtained by GPS/INS, and the ortho-images were produced by differential rectification based on that. As the result of measurement of RMSE based on digital map for ortho-images produced with GPS/INS data, the horizontal position error was 61cm that was good enough to satisfy the precision demand of 1:1,000 ortho-image map. There were no big differences in precision of ortho-images between GPS/INS and aerial triangulation process. It seems that the producing method of ortho-image using GPS/INS data can be speedier and more efficient method than traditional method using aerial triangulation

굴착중인 장대터널 내 최적의 환기시스템에 관한 연구

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

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.

GIS를 이용한 지하매설물 관리 방안

박병욱 호남대학교 1995 호남대학교 학술논문집 Vol.16 No.2

This paper proposes subjects to consider when GIS technique is introduced to effective management of underground facility. They are as follows : First, the scale of digital maps for underground facility management should be larger than 1/500. Second, accurate survey about actual facility condition must be carried out, in terms of enough time and cost, by facility location detectors. Third, surveying by total station or GPS equipment is adequate to aquire saptial information of underground facility which position determined by detectors. Finally, synthetic data management by exclusive department is necessary, and continuous management is very important.

위성영상을 이용한 대전 그린벨트권역의 도시화특성 분석

박병욱 안성산업대학교 2002 論文集 Vol.33 No.-

The shape of urban growth in Daejeon greenbelt area was verified through analysis of land cover change using satellite images, and greenbelt area was comparatively analyzed inside and outside of the greenbelt. From these analyses, we estimated the influence of the greenbelt. The relationship between urbanization and topographical factors was analyzed through study on topographical distribution in urbanization areas. Though urbanization had progressed in a part of greenbelt area, greenbelt of Daejeon metropolis played a role in preventing infinite sprawl of built-up area. The analysis on the relationship between urbanization and topographical factors showed that most urban expansions were progressed in the area where elevation was less than 100 m and slope fewer than 5 %. On the other hand, the aspect, except flat space, was analyzed that it was not directly related to the urbanization pattern.

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.

전용 에이전트를 이용한 실시간 웹 서버 침입탐지

田炳旭 水原大學校 2005 論文集 Vol.23 No.-

As the Internet and its users are rapidly increasing, the existing firewall and the related techniques are faced serious limitations to detect various types of attacks which exploit vulnerability of web server. Today, most intrusion methods utilize the web application programming error and its mechanism. In this paper, a method is proposed by using the real-time web-server agent. The agent analyzes web-server based log and detect attacks based on the analysis of web-application's vulnerability. The real-time agent removes process ID(pid) and block out attacker's IP when it detects the intrusion through the decision stage after analysis types and patterns of attack.

의미 분석 단계에서의 정보 흐름 제어

조현욱,김명수,정은환,유재휘,윤병주 명지대학교 공학기술연구소 1986 공학기술연구소 논문집 Vol.1 No.-

One of protection methods for computer internal data is to pursue data flow in program and to control its flow. In this thesis, we propose a mechanism which guarantees secure information flow in a program. By investigating security classes of all the variables in a statement and judging necessary condition for secure information flow, proposed model descriminates the program whether it is secure or not. Out model can be implemnted at language translation time, particularly semantic analysis phase, by pursuing security class transfer of each statement.

架空送電線의 氷雪害 危險度 判別 시스템

閔丙旭,朴在雄 大田産業大學校 1995 한밭대학교 논문집 Vol.12 No.0201

The electrical power transmission line system to deliver the electrical power generated at power plants to each areas is operated based on the circular network throughout the overall country. However it has a lot of causes of disorders by the weather conditions since it is exposed to the most unfavorable weather conditions. Because of the difficulty in research condition confined to the winter frozen areas, there in no reasonable design criteria related to the research on the icing and snow-up in the transmission line, one of the most frequent reasons of troubles in operation and it is hardly possible to detect the critical condition under icing and snow-up on the basis of numerical calculation. In this paper, the causes of disorder by icing and snow-up in the transmission line is analyzed and the detection method for the critical condition of the line movement arising in the ice and snow-stuck line is investigated. The amount of stuck ice and sonw is found to be a very critical point in the detection of the critical condition under icing and snow-up in the transmission line. Hence the research is focused on the detection system of the critical conition under icing and snow-up in overhead transmission line which can determine the critical condition by refering to the regional icing arid snow-up characterisics. The following is the detailed detection mehtod related to this point. 1. The detection of the critical condition for the possibility of tensionless state generation in the line in case the sleet jump. 2. The detection of the critical condition for the line short by the approach of the lines within the minimum marginal length for isolation which is caused by the line sagging due to the dead weight. 3. The detection of the critical condition for the line break due to the increase in the tension at the supporting point with ice and snow stuck.

지하수 내 질산성질소 제거를 위한 이온교환공정의 적용

배병욱 대전대학교 산업기술연구소 2000 산업기술연구소 論文集 Vol.11 No.2

도시상수도가 보급되지 않은 농어촌지역에서 간이상수도용으로 사용되고 있는 지하수가 축산분뇨와 질소비료에 의해 심하게 오염되고 있어 질산성질소의 위해성에 대한 우려가 제기되고 있다. 최근에 충청남도보건환경연구원에서 도내 224개 간이상수도 시설을 대상으로 수질검사를 실시한 결과, 23%에 해당하는 시설이 질산성질소 기준 10 mg/L를 초과하는 것으로 조사되었다. 수중에 존재하는 질산성질소는 이온교환, 생물학적 탈질소, 화학적 환원, 그리고 역삼투나 전기투석 등과 같은 공정으로 제거할 수 있으나, 지하수 내에 존재하는 질산성질소를 제거하는 데는 이온교환이 가장 간단하고 효과적이며 경제적이다. 현재의 지하수 오염상황을 고려할 때 질산성질소 문제를 해결하기 위하여 새로운 관정을 시공하는 것은 더 이상 쉬운 대안이 아닌 것으로 판단된다. 이런 배경에서 이온교환공정에 대한 이해의 폭을 넓히고자, 본 논문에서는 질산성질소의 특성과 이온교환기술의 기본 개념에 대해 고찰하였다. Contamination of groundwater used for drinking water in rural areas with nitrate is becoming an important problem due to its harmful effects. According to a survey by the Governmental Institute in 1997, it is estimated that about 23% of the small water supplies in Chungchongnam-do Province exceeded the maximum admissible level of 10 mg NO3--N/l. Among several techniques available for the removal of nitrate, such as ion exchange, biological denitriflcation, chemical reduction, and reverse osmosis or electrodialysis, the ion exchange process seems to be the most suitable for small water suppliers contaminated by nitrate because of its simplicity, effectiveness, and relatively low cost. Considering the present status of groundwater contaminated by nitrate, boring new pumping wells for potable water sources of small communities can not be a viable alternative any more. The ion exchange technology seems to be the most suitable technology for the treatment of small volumes of groundwater polluted by nitrate, In this paper, for better understanding of the ion exchange process, the characteristics of nitrate and the basic concept of ion exchange were reviewed.

실용적인 이취미 측정법을 이용한 상수원수 내 이취미 모니터링

배병욱,김영일,이병은 대전대학교 환경문제연구소 2001 환경문제연구소 논문집 Vol.5 No.-

In order to investigate the occurrence characteristics of teste and odor(T&O) in drinking water supplies, water quality data of the Songchon water treatment plant(WTP) copes with T&O episode were used. Three kinds of water, such as raw and filtered water of the Songchon WTP, and tap water of consumer's house, were monitored by using three sensory methods, including TON, 2-out-of 5 odor test, and attribute difference test for the presence of absence of geosmin. The population densities of algae species were high correlate with Chlorophyll-a during T&O episode. At that time, dominant genus of algae were blue-green algae which were Microcystis, Oscillatoria, Aphanizomenon, and Anbaena. TON values of raw water increased about 40 since July, but decreased below 10 after July due probably to the heavy rain lasted for a long time. TON values of filtered water were maintained less than 5, because of added PAC(powdered activated carbon) in raw water of the Songchon WTP. For identifying geosmin and 2-MIB in raw and filtered water of the Songchon WTP were measured by Deajeon University and Philadelphia Suburban Water Company(PSWCO). PSWCO Showed some difference in absolute values, there might be somewhat clear relationship between CLSA data and Ton values. The maximum geosmin was about 45 ng/l on July 14. Comparing the results of 2-out-of 5 odor test and TON, it seems that 2-out-of 5 odor test is more sensitive than TON for the samples with TON below 5. Like 2-out-of 5 odor test, it was found that the attribute difference tedt might be more sensitive and appropriate than TON when the odor intensity of sample is low.