• 한국멀티미디어학회논문지
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• 제13권12호
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• pp.1767-1777
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• 2010

In digital TV broadcasting, such as terrestrial, cable, satellite, and IPTV, the head-end of digital TV broadcasting has a more complicated transmission structure than that of analog TV broadcasting. Furthermore, digital TV broadcasting has a feature that supports multiplex models, such as Multiple Program Transport Stream (MPTS). Therefore, the purpose of our work was to design and examine a more efficient new system of emergency alert message transmission to support the digital TV broadcasting environments. Digital TV broadcasting is the IP generation or RF transmission of 8-VSB, QAM, and QPSK modulated through a multiplexer or re-multiplexer multiplexed stream as a MPEG-2 Transport Stream after content encoding. The new system proposed in this paper transmits an emergency alert message without scrambling after replacing the PID and payload of the -packet with the message prototype in the TS stream from the multiplexer. If we need to transmit an emergency alert message under digital TV broadcasting services, then the receiver first checks the PID of each packet in the TS stream for the emergency alert message. Next, if a packet is determined to be an emergency alert message, then the set-top box displays the message on the TV screen using its function of On Screen Display, or the PC based software displays the message on the monitor screen using its function of overlay with user interface if the packet is found to be an emergency alert message. We have designed an emergency alert message protocol and a system model. By experiments and analysis of the system, we concluded that the system achieved efficiency and the ability to send and receive emergency alert messages using the system under different digital TV broadcasting service environments.

• 대한한방내과학회지
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• 제18권1호
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• pp.1-14
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• 1997

An experimental study was done to investigate the spontaneous movements to the isolated ileum with liquid extracts of Samchulgunbitang. Then the action of gastric ulcer, gastric-juice secretion, the free acidity, total acidity, pepsin output, the transport ability in the intestine, analgesic effect and sleeping time were measured. The following results were obtained; 1. As to the spontaneous movements in the isolated ileum, the effect of contraction against suppression was recognized. 2. The effects of contraction against suppression induced by acetylcholine chloride and barium chloride were recognized on the gastric funds strip significantly. 3. The preventive effect of Samchulgunbitang on the pylorus-lightedulcer in rat was recognized significantly. 4. The anti-ulcer effect of Samchulgunbitang was not recognized on the gastric ulcer caused by indomethacin. 5. The effects of decreasing on the secretion gastric juice, the free acidity, total acidity and pepsin output of Samchulgunbitang were recognized significantly. 6. The transport rate in the small intestine of Samchulgunbitang was decreased. 7. The transport rate in the large intestine of Samchulgunbitang was increased. 8. The analgesic effect of Samchulgunbitang caused by acetic acid was recognized significantly. 9. The sleeping time caused by pentobarbital-Na of Samchulgunbitang was prolonged significantly. According to the results, it is considered that the Samchulgunbitang has effects of gastric ulcer, chronic gastritis, hyper-acidity, gastroptosis such as abdominal discomfort, gastric acid, indigestion and anorexia.

• 한국해양환경ㆍ에너지학회지
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• 제2권1호
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• pp.26-33
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• 1999

오염된 지역의 연안 퇴적물은 PCB 등 소수성 오염 물질을 흡착하고 있으며, 준설과 같은 환경 정화사업을 할 때, 재부유되어 오염되지 않은 인근 수역으로 이동될 수 있다. 이러한 환경 영향의 평가를 위해 저자는 앞서 침강, 연직확산, 응집에 의해 입자크기 분포가 변화하는 것을 모사할 수 있는 수학적 모델을 개발 제시한 바 있다. 본 연구에서는 이 모델을 이용하여, 연안환경을 실험적으로 재현한 높이 2 m의 settling column으로부터 측정된 입자크기분포 자료를 이용하여 시뮬레이션하며 분석한 결과를 제시하였다. 분석결과, 모델은 퇴적물 입자가 column 내에서 연직이동을 하며 입자 분포가 시간적으로 또 수심별로 변화하는 것을 상당히 잘 예측하는 것으로 나타났으며 재부유된 퇴적물 입자는 연직이동과 함께 응집이 되고 있는 것으로 분석되었다. 따라서 본 연구는 크기가 다양한 오염된 퇴적물이 응집에 의해 입자크기분포가 변화하며 연직 이동되는 매우 복잡한 현상에 대해 유효하게 컴퓨터 모사할 수 있음을 보였다.

• 대한한방종양학회지
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• 제4권1호
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• pp.1-16
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• 1998

In order to investigate the effect of Bujaleejungtang, by means of oral medication to rats and mice, to isolated intestine and stomach, and the effect to pyloric ulcer, indomethacin-induced ulcer, secretion of gastric juice, and to transport ability of intestine content were studied as the action to G-I tract. The effect to normal rats and resperpine-treated rats were studied as the action to thermo-regulation. The results were as follows: 1. Bujaleejungtang showed the inhibitory effect on the smooth muscle contraction induced by acethylcholine chloride and barium chloride in the isolated mice ileum. 2. Bujaleejungtang showed inhibitory effect on the contraction induced by acetylcholine chloride and barium chloride in the rat fundus-strip. 3. Inhibitory effect of Bujaleejungtang on pyloric ulcer, indomethacin-induced gastric ulcer in rats was statistical recognized(p<0.05). 4. No inhibitory effect of Bujaleejungtang on gastric juice secretion in Shay rats was recognized. 5. Inhibitory effect of Bujaleejungtang on gastric free acidity and total acidity in Shay rats was recognized only when Bujaleejungtang was medicated in high thickness(2000mg/kg) (p<0.001). 6. Inhibitory effect of Bujaleejungtang on pepsin output in Shay rats was recognized only when Bujaleejungtang was medicated in high thickness(2000mg/kg)(p<0.001). 7. Inhibitory effect of Bujaleejungtang on barium sulfate transport in the small intestine of mice was recognized only when Bujaleejungtang was medicated in high thickness(2000mg/kg)(p<0.05). 8. Inhibitory effect of Bujaleejungtang on barium sulfate transport in the large intestine of mice was recognized(p<0.05). 9. Inhibitory effect of Bujaleejungtang on rectal temperature in normal rats was recognized. 10. Inhibitory effect of Bujaleejungtang on rectal temperature in reserpine-treated rats was recognized only when Bujaleejungtang was medicated in high thickness(2000mg/kg)(p<0.05).

• Smart Structures and Systems
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• 제20권2호
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• pp.163-173
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• 2017

Structural health monitoring (SHM) of civil infrastructure using fiber Bragg grating sensor networks (FBGSNs) has received significant public attention in recent years. However, there is currently little research on the health-monitoring technology of high-piled wharfs in coastal ports using the fiber Bragg grating (FBG) sensor technique. The benefits of FBG sensors are their small size, light weight, lack of conductivity, resistance corrosion, multiplexing ability and immunity to electromagnetic interference. Based on the properties of high-piled wharfs in coastal ports and servicing seawater environment and the benefits of FBG sensors, the SHM system for a high-piled wharf in the Tianjin Port of China is devised and deployed partly using the FBG sensor technique. In addition, the health-monitoring parameters are proposed. The system can monitor the structural mechanical properties and durability, which provides a state-of-the-art mean to monitor the health conditions of the wharf and display the monitored data with the BIM technique. In total, 289 FBG stain sensors, 87 FBG temperature sensors, 20 FBG obliquity sensors, 16 FBG pressure sensors, 8 FBG acceleration sensors and 4 anode ladders are installed in the components of the back platform and front platform. After the installation of some components in the wharf construction site, the good signal that each sensor measures demonstrates the suitability of the sensor setup methods, and it is proper for the full-scale, continuous, autonomous SHM deployment for the high-piled wharf in the costal port. The South 27# Wharf SHM system constitutes the largest deployment of FBG sensors for wharf structures in costal ports to date. This deployment demonstrates the strong potential of FBGSNs to monitor the health of large-scale coastal wharf structures. This study can provide a reference to the long-term health-monitoring system deployment for high-piled wharf structures in coastal ports.

• 수산해양기술연구
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• 제51권3호
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• pp.333-339
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• 2015

Fish exportation using airplanes incurs sizable logistics costs (12,000KRW/kg), according for more than 45% out of the total export cost. Thus, it is unreasonable to quantitatively expand fish exportation by means of air transport. In addition, cases of failing to deliver fish at the right time to the right place occurs frequently due to the limited cargo capacity and insufficient cargo space of airplanes, especially during the peak season. Therefor, a technology that not only minimizes the logistics costs but also transports fish freshly and safely, in the case of long distance exportation to countries such as the United States and Taiwan, should be developed. In this study, a live fish container control system for long distance transportation was designed and implemented. Live flatfish (2,000kg) were selected as the target fish, were transported to the United States to analyze and verify the performance of the a live fish container control ystem and transportation ability.

• 한국농공학회논문집
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• 제55권6호
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• pp.135-144
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• 2013

Ventilation efficiency has an important role in agricultural facilities such as greenhouse and livestock house to keep internally optimum environmental condition. Age-of-air concept allows to assess the ventilation efficiency of an agricultural facility according to estimating the ability of fresh air supply and contaminants emission using LMA and LMR. Most of these methods use a tracer gas method which has some limitations in experiment like dealing unstable and invisible gas. Therefore, the aim of this study was to develop a straightforward method to calculate age-of-air values with CFD simulation which has the advantage of saving computational time and resources and these method can solve the limitations in experiment using tracer gas method. The main idea of LMA computation is to solve the passive scalar transport equation with the assumption that the production of the time scalar throughout the room is uniform. In case of LMR calculation, the transport of the time scalar was reversed compulsively using UDF. The methodology to validate the results of this study was established by comparing with preceding research that had performed a computing LMA and LMR value by laboratory experiments and CFD simulations using tracer gas. As a result, the error was presented similarly level of results of preceding research. Some big errors could be caused by stagnated area and incongruity turbulence model. while the computational time was reduced to almost one fourth of that by preceding research.

• 한국해안해양공학회지
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• 제6권3호
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• pp.245-259
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• 1994

연직 확산계수의 산정에 k-I 난류방정식을 도입하여 예측성을 향상시킨 치안 해수유동 및 온배수 확산에 관한 3차원 수치모형을 개발하였다. 모형은 1차원 수로에서 취송류의 연직분포, 정지수역으로의 온배수 젯트에 대하여 수리실험자료와의 비교검증을 실시하고 고리해역에서 조류 및 온배수 확산을 해석하여 현장 적용성을 검토하였다. 계산결과는 검증에 사용된 자료와 대체로 일치하는 양호한 결과를 보였으며, 취송류, 밀도류, 조류에 대하여 동일한 모형상수를 사용하여 연직 확산계수를 계산할 수 있어 난류모형의 상수가 보편성이 있음을 확인하였다. 따라서, 본 연구에서 $textsc{k}$-ι 난류방정식을 도입하여 개발된 수치모형은 연안 해수유동을 대표하는 취송류, 밀도류, 조류에 대하여 난류상수의 보편성과 모형의 예측성을 갖고 있어 연안 해수유동 및 확산을 연구하는 데 효율적으로 활용될 수 있을 것으로 사료된다.

• 대한화학회지
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• 제36권4호
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• pp.523-535
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• 1992

ECEPP/2 및 MM2 방법을 이용하여 고리형 헥사펩티드의 형태 및 알칼리 금속 양이온과의 착물형성 그리고 DPH에 의한 양이온 전달방해를 이론적으로 살펴보았다. 착물을 형성하지 않은 고리형 펩티드에 대하여 여러 가지 안정한 형태가 얻어졌으며, 대부분의 아미드 수소원자는 카르보닐 산소와 분자내 수소결합을 이루고 있어 조밀한 구조를 나타내었다. 펩티드와 Na$^+$ 이온 및 DPH간의 착물형성에너지는 각각 -60kcal/mol 및 -18kcal/mol이었다. 그러나 헥사펩티드의 국부최소에너지 구조들에는 금속 양이온을 결합할 수 있는 공동이 존재하지 않았고 공동이 존재하는 헥사펩티드의 에너지는 본 연구의 최저에너지 구조보다 10kcal/mol 정도 높은 에너지를 주었으며, 이러한 에너지 차이와 금속 양이온의 탈수 과정을 고려하면 DPH에 의한 양이온 전달방해를 설명할 수 있었다. 또한 DPH와 결합하는데 있어서의 가장 중요한 아미노산 잔기는 글리신이었으며 이를 사코신(N-메틸 글리신) 으로 치환할 때 양이온 전달이 저해되는 실험적 사실을 설명할 수 있었다.

• 품질경영학회지
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• 제51권3호
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• pp.381-401
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• 2023

Purpose: The purpose of this study was to understand the perception of medical staff to propose an infected patient transport robot as a means of responding to infectious diseases. Methods: The data collected through the survey was analyzed through AHP analysis. The measurement tools used in this study were derived through the SERVQUAL model and Focus Group Interview(FGI), and consisted of four detailed questions for each of five classes: tangible, reliability, responsiveness, assurance, and empathy. Results: As a result of the study, there are concerns about risk factors that may occur in areas where medical staff intervention is minimized. Above all, we confirmed the consensus that safety should be the top priority during the process of robots to transport patients. In particular, highlighted were the resolution of device errors that may occur during the process for transporting patients and easy provision of the first aid. Additionally, the ability to monitor patients and suppress infection factors turned out to be important, which was directly related to the simplification of the role of medical staff and work efficiency. Conclusion: As one of the means of effectively controlling infectious diseases in a pandemic situation, a robot to transport the infected patient was considered. However, in order to commercialize this, specific verification of the safety of medical staff and patients is needed, and empirical data on providing the first aid, patient monitoring, and infection factor suppression should be presented.