• Proceedings of the Korean Information Science Society Conference
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• 2007.06d
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• pp.157-162
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• 2007

최근 홈 네트워크 및 유비쿼터스 컴퓨팅에 대한 일반인들의 관심이 크게 증가하면서, 10m 내외의 단거리에서 사용되는 개인 무선 네트워킹 솔루션인 무선 PAN 기술이 주목받고 있다. 본 논문에서는 이러한 무선 PAN 기술 중 저속, 저가, 저전력의 무선통신 기술인 ZigBee 이용해 당뇨병 환자들을 위한 실시간 모니터링 시스템을 구현하였다. 즉, 휴대용 인슐린 펌프에 ZigBee 통신이 가능한 모듈을 장착함으로써, 인슐린 펌프에 내장된 환자의 혈당치, 인슐린 투입량 등과 같은 중요 데이터를 별도의 조작 없이 유선 클라이언트에 실시간 전송할 수 있게 된 것이다. 한편, 유선 클라이언트에 저장된 환자의 정보는 서버에 즉시 전송되며, 담당 주치의의 모니터링이 가능하도록 웹 접근성을 부여하였다. 이를 통해 환자들이 보다 안전하고 편리하게 휴대용 인슐린 펌프를 사용할 수 있도록 하였다.

• Journal of The Korean Society of Clinical Toxicology
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• v.3 no.1
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• pp.48-51
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• 2005

Diagostic imaging can help in management of toxicologic emergencies. We report a patient who presented to the emergency department with coma and suppressed respiration after ingestion of unknown substance. We documented chloroform with radiopaque material in bowel on abdominal radiograph. We used activated charcoal and laxative to decontaminate bowel. Hepatotoxicity occurred on 3rd admission day and elevation of liver enzyme reached peak level on 5th admission day. The patient received hemoperfusion, N-acetylsystein and supportive cares. The patient was improved from hepatic dysfunction and discharged without complication on 11th admission day. Radiograph in toxicology may confirm a diagnosis and assist in therapeutic intervention.

• The Transactions of the Korea Information Processing Society
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• v.6 no.8
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• pp.2213-2221
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• 1999

A line segment has a symmetrical property about its midpoint. With this symmetrical property for a line segment we have proposed a variant of Bresenham's line drawing algorithm that selects two pixels at the same time. It implies that bi-directional line drawing toward the midpoint of line segment from each-end be possible. Besiders, it can select two pixels using only one decision parameter, instead of two different parameters for each pixel. We also present a theoretical proof for the correctness of such a selection. Thus, we can reduce the time of generating line segment by approximately less than 5% compared to the Bresenham's method. Also, our experimental results show that the shape of line segment generated by the proposed approach is the exactly same as that of Bresenham's method.

• Proceedings of the Korean Information Science Society Conference
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• 2012.06b
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• pp.54-56
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• 2012

본 논문에서는 위치인식 센서기반 무인이송차량(AGV)의 이동 제어 문제를 다루고자 한다. AGV의 진행 경로를 지시하는 랜드마크를 부착할 때 사각지역(dead zone) 및 중첩 지역(overlap zone)이 존재할 경우 위치 추정 오차가 허용 범위를 크게 벗어나게 되며, 이로 인해 AGV가 오동작하는 현상이 발생한다. 이를 해결하기 위해 본 논문에서는 단일 랜드마크 대신 이웃한 2개의 랜드마크 인식을 통해 위치 추정 오차를 보정하는 방안을 제안하였다. 또한, 회전 구간에서 AGV가 방향 전환 직후 지정된 경로에 허용오차 범위 이내로 진입하도록 안쪽 바퀴와 바깥쪽 바퀴의 가속도 제어 알고리즘을 제안하였다. 본 논문에서 개발된 시스템은 화장장 시신 운구용 AGV에 적용하였다. 화장장은 기존 산업 현장에 비해 이동 공간이 협소할 뿐만 아니라 그 특성상 정밀 제어가 필요한 환경이다. 본 논문에서 제안한 방식은 모의 차량에 적용하여 그 타당성을 검증하였으며, 실제 국내 화장장에 AGV 시스템을 적용한 결과 허용오차 범위 이내에서 정상 동작함을 확인하였다.

• Journal of The Korean Society of Clinical Toxicology
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• v.11 no.1
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• pp.46-48
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• 2013

Potamotrygon motoro, also known as the Marble motoro, is a potamodromous freshwater ray native to the basins of the Amazon River. Marble motoros were introduced to South Korea in the 2000s, and, because they are easy to raise, were sold as aquarium fish. The aim of this report is to illustrate a new case involving envenomation by a Marble motoro. A 35-year-old commercial aquarium assistant came to the hospital after being pricked by a Marble motoro. The clinical picture in this case showed acute local pain with minimal systemic manifestations. This patient recovered after receiving symptomatic treatment and wound care. This case of envenomation accentuates the potential for injury among people coming in contact with a venomous Marble motoro.

• Journal of Astronomy and Space Sciences
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• v.14 no.1
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• pp.109-116
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• 1997

The Mesopause (85km) is the boundary between the Mesosphere and the Thermosphere and is very interesting region because there are active fluid dynamic motions and airglow phenomena due to various chemical reactions. But there have been not many studies due to the difficulties of insitu measurement. However in this study we have obtained the Doppler temperatures and winds through the observing Hydroxyl(OH) emission at 843nm using a ground-based Fabry-Perot interferometer. Due to the 2 years of long term observation, we can confirm the seasonal Mesopause temperature variation, which is the opposite trend against the temperature at the ground level, and reveal annual and biannual variations for meridional and zonal wind respectively. These seasonal variations might be the result of the inter-hemispheric circulation.

• Proceedings of the KSR Conference
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• 2004.10a
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• pp.1508-1513
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• 2004

Examining the market orientation and learning orientaiton and these relationship with business performance has received considerable interest in the last decade. Despite these interest, our understanding of the structure of both market orientation and learning orientaion and the mechanism of those effect on business performance is apparently limited in figuring out the railroad industry in Korea. The purpose of this research was to conceptualize and measure the organizational culture dimension from the integrative framework of market orientation and learning orientation, and to analyze its relationship with business performance in the railroad industry. The findings from this research are such as follows; market orientation is a set of three interrelated components, i.e., customer orientation, competitor orientation, and inter-functional coordination. This finding is similar to that of Narver and Slater(1990; 1994) who conceptualized market-oriented culture as a combined set of those 3 components. Learning-oriented culture also has a significant positive effect on business performance. The research findings suggest that both market orientation and learning orientation do exist as different organizational culture dimensions to acquire the sustainable competitive advantage in the railroad industry.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.15 no.2
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• pp.1027-1035
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• 2014

The most important design factor for portable devices is power consumption. In this paper, in the early design stage of a mobile device which measures temperature and humidity a power consumption model will be proposed and then the overall power consumption will be estimated based on this model. We will verify previously the correctness of such estimated power consumption before implementation of the real device. That is our proposed design methodology based on power consumption model. An improved design method for efficiently reducing the current consumption in the idle mode is also presented. By implementing a real prototype of the mobile device for measuring temperature and humidity, the correctness of our proposed design methodology based on power consumption modeling will be verified.

• Journal of the Korean Society for Precision Engineering
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• v.18 no.1
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• pp.89-97
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• 2001

A microgyroscope, which vibrates in two orthogonal axes on the substrate plane, is designed and fabricated. The shuttle mass of the vibrating gyroscope consists of two parts. The one is outer shuttle mass which vibrates in driving mode guided by four folded springs attached to anchors. And the other is inner shuttle mass which vibrates in driving mode as the outer frame does and also can vibrate in sensing mode guided by four folded springs attached to the outer shuttle mass. Due to the directions of vibrating mode, it is possible to fabricate the gyroscope with simplified process by using polysilicon on insulator structure. Fabrication processes of the microgyroscope are composed of anisotropic silicon etching by RIE, gas-phase etching (GPE) of the buried sacrificial oxide layer, metal electrode formation. An eletromechanical model of the vibrating microgyroscope was modeled and bandwidth characteristics of the gyroscope operates at DC 4V and AC 0.1V in a vacuum chamber of 100mtorr. The detection circuit consists of a discrete sense amplifier and a noise canceling circuit. Using the evaluated electromechanical model, an operating condition for high performance of the gyroscope is obtained.

• Pediatric Gastroenterology, Hepatology & Nutrition
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• v.2 no.2
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• pp.256-261
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• 1999

Ileus caused by impaction of hardened residual barium stagnated in the colon, a rare complication of barium-enema examination, constitutes a particularly serious problem when it occurs in congenital megacolon patients. The administration of gastrografin in such case has proven efficacy in dissolution of impacted barium refratory to routine means of evacuation. We experienced a case of barium-impaction occurred in 6-months old male who had congenital megacolon. Gastrografin enema was a safe and simple method used in the management of this case.