• Journal of the Korea Society of Computer and Information
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• v.27 no.2
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• pp.195-201
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• 2022

There was a report that the prevalence of gallbladder polyps (GBPs) and some clinical variables were different between the urban and rural area, which was performed in a mainland. Thus the previous report could have some confounding factors. Therefore, the purpose of this study was to compare the prevalence of GBPs and clinical variables on the isolated island to exclude extrinsic confounding factors. We compared the prevalence of GBPs and clinical variables among 21,734 residents who visited a single medical check-up center in Jeju National University Hospital from January 2010 to December 2019 according to their residences on Jeju Island. The prevalence of GBPs were 10.1% in the urban area 8.7%, respectively (P = 0.006). Among clinical variables, the rate of central obesity, the mean levels of fasting blood glucose, low density lipoprotein-cholesterol, alkaline phosphate and gamma-glutamyltransferase and the mean age among residents in the rural area was statically higher in the urban area; however, the mean total cholesterol level among residents in the urban area significantly higher than in the rural area. This study showed that the prevalence of GBPs and some clinical variables among residents were statistically different between the urban area on Jeju Island.

• Applied Chemistry for Engineering
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• v.9 no.6
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• pp.901-906
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• 1998

Gas and liquid flow characteristics were investigated in an internal circulation airlift reactor using a single nozzle for a gas distributor. In three reactors with different diameters of the downcomer and heights of the riser, the gas holdup in the individual flow zone and the impulseresponse curve of tracer for an air-water system were measured for various gas velocities and reactor heights. Experimental results showed that the flow behavior of bubbles in the riser was the slug flow due to strong coalescences of bubbles and that the bubble flow pattern in the downcomer was the transition bubble flow for the smaller diameter of the downcomer, however, it was the homogeneous bubble flow for the larger one. And mean gas holdups in the individual flow zone and the reactor were greatly increased with decreasing the diameter of the downcomer for the equal ratio of height of the top section to that of the riser. Also, the mixing time was much effected by the height of the top section of reactor and for the equal ratio of height of top section to that of the riser, it was increased with increasing the diameter of the downcomer and the height of the riser. Flow characteristics of liquid were mainly varied with the bubble flow pattern in the downcomer and the size of the top section of reactor. And circulation velocities of liquid in the riser were increased with increasing gas velocities and the size of the top section of reactor, and for the equal ratio of height of top section to that of the riser, they were increased with increasing the diameter of the downcomer and the height of the riser.

• Journal of the Korean Geographical Society
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• v.50 no.3
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• pp.325-338
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• 2015

Telemedicine, which gives or receives medical information via ICT (information and communication technology), is regarded as innovation in a medical field and its application is various according to offline conditions. For example, the utilization of telemedicine in Korea is unfair because of the administrative discretion, which is the basic unit of telemedicine for its practical operation, in spite of the same diagnostic area. With this mind, this study investigates the cause of regional differences of telemedicine through a case of Kangwon province. Furthermore, the crucial matter is that regional differences of telemedicine are associated with digital divide; therefore, this research considers digital divide triggered by telemedicine. The core results are as follows. First, there are little measures such as increase of the staff, economic compensation for public officials, education of telemedicine facilities; accordingly, only regions, where can accept these insufficient conditions, manage the telemedicine system. Second, the interesting of a mayor or a governor and a head of a health center as a highest decision maker has something to do with different utilization of telemedicine. Third, public health doctors play a role as practical operators in telemedicine, but their stance is skeptic about telemedicine somewhat because of the relationship with the medical association opposing the implementation of telemedicine, unimproved regional health care condition, etc. Forth, it seems that the digital divide caused by the regional differences of the present telemedicine utilization does not led to tangible results and is not turned to another disparity so far, the proper measures are required considering that various health care services based on telemedicine will be extended.

• Proceedings of the Korea Water Resources Association Conference
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• 2008.05a
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• pp.1689-1693
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• 2008

서해안은 최대 조석 차 9 m 이상의 세계적으로 손꼽히는 반일조 지역이므로 염수가 신곡수중 보까지 치고 올라오는 것으로 알려져 있으나 한강 하구부에서의 흐름 및 염도분포 해석에 관한 연구는 지형적 군사적 특성 상 많이 진행되지 못했다. 본 연구에서는 2차원 하천해석 프로그램인 RAMS를 적용하여 신곡수중보 하류로부터 유도지점까지의 염도 분포 및 염수 길이를 해석하고 경험식을 이용해 수치모의 결과를 검증하였다. 염수가 최상류까지 치고 올라갈 수 있는 조건으로 최대조위와 최소유량을 가지는 시점을 택해 염도분포 농도를 계산하였으며 하류단인 유도지점의 염도를 인천검조소 실측값으로부터 전이하기 위해 이송분산방정식의 연속주입 해석해를 이용하였다. 염도분포의 최선단부는 장항 IC 부근으로 최대 역류 발생 위치와 같은 지점이었으며 정상염수 쐐기 경험식에 의해 염수의 길이를 해석한 결과와도 일치하였다.

• Korean Journal Plant Pathology
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• v.12 no.2
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• pp.156-161
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• 1996

세계적으로 구리약제에 대해서 저항성을 나타내는 균주들이 발견되있으며, 이들은 구리약제의 방제효과를 감소시켰다. 국내에서도, 구리 저항성 균주 Xanthomonas campestris. pv. vesicatoria HN94-2, -3, -4, -5, -6 들이 천안지역의 고추재배지에서 처음으로 분리되었으며, 이들 균주들의 nutrient agar에서 황산구리(CuSo\ulcorner)에 대한 최소억제농도(minimum inhibitory concentration, MIC)는 1.4~1.6 mM이었다. 이들은 모두 황산아연(ZnSO\ulcorner)에 대해서는 감수성을 보여, 구리저항성 균주에 대한 방제약제로서 아연 함유 약제를 사용할 수 있을 것이다. 분리된 균주중 HN94-2와 HN94-6을 이용하여 접합(conjugation)을 통해 구리저항성의 전파를 실험한 결과, 이들 두 균주 모두 구리감수성 균주에게 4.3$\times$10\ulcorner에서 1.0$\times$10\ulcorner(transconjugant/donor)의 정도로 구리 저항성이 전이되었다. 이들 HN94-2와 HN94-6 균주의 구리정항성 유전자들은 약 200 kb 정도의 커다란 플라스미드(plasmid)에 존재하며, 이들은 각각 pXVK9402와 pXVK9406이라 명명되었다.

• Proceedings of the Korean Information Science Society Conference
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• 1998.10c
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• pp.461-463
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• 1998

본 논문에서는 활성 템플릿을 이용하여 임의의 형태를 가지는 이동 물체에 대한 정보를 추출하고, 이동 물체를 감지한다. 활성 템플릿을 이용함으로써 기존의 활성 모델에서 추출하지 못했던 이동 물체의 움직임 정보, 즉 전이정보, 회전정보, 크기변화 정보의 추출이 가능하다. 이 방법은 이동물체를 정확하게 감지할 필요없이 활성 템플릿 정합만으로 이동 물체에 대한 정보 추출이 가능하게 한다. 또한 이동 물체에 대한 움직임 정보 추출 후에 활성 템플릿의 윤곽선과 이동 물체 윤곽선간의 차이벡터를 이용하여 템플릿 영역내의 이동 물체 감지가 가능하다. 이것은 기존의 스네이크 알고리즘에 존재하는 지역 최소화 문제에 대한 해결방안이라고 볼 수 있다. 본 논문은 향후 얼굴 표정 인식 및 추적, 사람의 머리 추적, 행위 인식 등에 응용이 가능하다.

• The Optical Journal
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• s.112
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• pp.46-49
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• 2007

첨단 기술관련 산업의 핵심을 이루는 광산업과 전자산업의 발전상을 직접 확인하고 희망찬 미래상을 제시하고자 기획된 국제광산업전시회와 한국전자전이 성황리에 개최됐다. 지난 9월 4일부터 6일까지 광주 김대중컨벤션센터에서 열린 국제광산업전시회는 올해 아시아지역에서 가장 권위 있고 규모가 큰 아.태광통신콘퍼런스를 유치하는데 성공함으로써 광산업 관련 신기술을 주제로 발표하는 콘퍼런스를 진행하며 관심을 모았다. 10월 9일부터 13일까지 5일간 경기 고양시 킨텍스에서 열린 한국전자전에는 국내 삼성전자와 LG전자, 소니와 중국의 하이얼 등 글로벌 기업들이 대거 참여해 전자제품을 총 망라한 신기술을 선보였다. 한편, 전자전은 단독 전시회로서는 올해를 끝으로, 내년부터 반도체산업대전, 정보디스플레이전과 통합해 '한국전자산업대전'이라는 명칭으로 같은 장소에서 개최될 예정이다.

• The Journal of Engineering Geology
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• v.18 no.1
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• pp.7-16
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• 2008

Limestone area have mostly certain geological defects such as the internal cavities due to melting and fractured zone by external pressures. Especially, in case of constructing grand bridge, the treatment of the limestone cavities area having the geological defects is inevitable. In order to reduce foundation settlement and to reinforce the ground in the limestone cavities area, high pressure jet grouting has been carried out as a countermeasure method. Despite the fact that high pressure jet grouting method has already adopted at a lot of limestone cavities area, but the amount of research and technical data on the high pressure jet grouting have not been accumulated properly so for. Therefore this paper intends to investigate the strength characteristics and deformation characteristics for reinforced limestone cavities area by high pressure jet grouting method. In addition, load carrying capacity obtained by static pile load test with load transfer measuring system is analyzed.

• Journal of Korea Water Resources Association
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• v.35 no.5
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• pp.597-609
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• 2002

This study suggests a methodology of hydrologic decision making for the establishment of a standard of drought management from the drought analysis by the past drought history and for the drought monitoring and management according to drought processing. The construction and analysis of a decision tree diagram are performed and the step by step plan according to drought severity is suggested. Say, the decision tree diagram is constructed by the transition probability and quantity of monthly precipitation. Then the drought processing is investigated by the analysis of diagram and the 3-step of drought notice, drought warning, and emergency plan are established. The suggested methology in this study can be used for the other area and the decision tree diagram be used by changing the diagram according to the utilization purposes. Also, the choice of monthly PDSI class and precipitation analysis can be performed by the continuous data supplement. And so, a new standard value by the modified diagram is provided and the continuous drought management will be possible.

• Journal of Korean Society of Transportation
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• v.20 no.6
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• pp.31-43
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• 2002

Traffic signal control methods are suggested to improve the operational effectiveness of COSMOS system in Seoul. First. a method that improves progression of the corridor traffic flow within a common sub-area was explored. Applying this method, both frequency and magnitude of offset transition were reduced as compared to the existing method. In addition, the level of connection among neighboring corridors increased by applying the method, thus the qualify of progression was also improved. Second, a practical guideline on signal phase design was proposed to improve the efficiency of actuated operations for the left-turn movement. Last, a method for estimating optimal queue length parameters was surveyed and evaluated. An evaluation study was performed for the suggested methods through both field and simulation studies. Results showed that the proposed methods gave better performance than the existing methods. It is expected that the use of proposed methods can improve operational performance of COSMOS.