• 한국전자통신학회논문지
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• 제14권4호
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• pp.787-796
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• 2019

본 논문에서는 환자에 링거액 주입 시 주입 완료 상태, 잔여량, 주입 중 상태 및 환자의 긴급 상황 알림 등 링거 주입을 제어하고 상태를 감지하여 이를 무선으로 간호사에 알려주는 링거 주입 IoT 시스템을 위한 설계 및 시험 방안을 제안한다. 이를 위해 링거액 센서 및 스위치, 상태 표시 및 무선 통신 기능을 갖는 회로를 설계하고, 스마트 링거 주입 IoT의 센싱 및 알림 정보를 제어하며, 이를 서버측에 알려 모니터링하기 위한 제어 및 모니터링 알고리즘을 제안한다. 또한 링거 IoT 시스템의 적합성을 시험하기 위해 링거액 감지 시간, 링거액 감지 거리, IoT 모듈 동작 온도, IoT 모듈 입력 파워, IoT 모듈 소비전력, 무선통신 속도 등의 시험기준을 설정하고 시험 결과를 분석한다.

• 한국정밀공학회지
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• 제31권7호
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• pp.585-590
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• 2014

Recently, monitoring systems, such as POP, take a core role in scheduling or planning of manufacturing facilities for production, maintenance, and so on. Such monitoring systems require functionalities for real-time parameter monitoring and controlling to maximize efficiency of facilities. However, vendors usually do not provide internal communication protocols or interface to access the machine controller. Therefore, the values of parameters related to machine operations and controls cannot be easily accessed from external devices. In this paper, we propose an interface methodology for a real-time monitoring and controlling of injection molding machine parameters such as user input parameters, embedded sensor data and injection molding status information.

• 한국생산제조학회지
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• 제21권1호
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• pp.161-166
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• 2012

Intravenous (IV) injection is widely used to supply Ringer solution directly into a vein in hospital. Generally, a passive injection method has been used, which causes the inconsistent flow rate of fluid and inappropriate control of injection time by a patient. It leads to an unnecessary nurse's overwork and decrement of IV injection's effect. To solve these problems, flow control infusion pumps have been developed. But because of relatively heavy weight and high price, its usage has been limited. In the present study, a new automatic IV injection system is developed. It is installed with a small pressing mechanism driven by a small electric motor to regulate the flow rate by pressing tube. Proportional integral derivative (PID) feedback control algorithm is applied to control the electric motor. The system is smaller in size and uses lower power than the existing commercial product. The newly developed system is also installed with networking capability, which enables monitoring the status of several automatic IV injection system at the same time.

• 제어로봇시스템학회논문지
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• 제3권3호
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• pp.318-322
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• 1997

A prototype of combustion zone monitoring system as been developed and installed into tuyeres of the blast furnace. The system consists of CCD(charge coupled device) cameras, sonic flow meters, an image processor and a personal computer. The personal computer collects raceway luminance data and operational data from the image processor that is connected to the color CCD camera from the blast furnace process computer, respectively. In addition, the sonic flow meters supply coal injection rate data to the personal computer. Then, the personal computer evaluates the combustion conditions with the raceway inspection algorithm. This integrated monitoring system allows us to detect abnormal raceway conditions and the clogging status of coal injection pipe. The image processing techniques of the system enable us to effectively monitor unburnt coal sticking to tuyere tip and injection lance wear conditions. Such a developed system ensures rapid and precise raceway inspection. The image processing capability of the system has helped operator to early detect both the unburnt coal sticking problem and the errosion problem of injection lance. Furthermore, the system could control the abnormal raceway condition based the the analysis results obtained from combustion monitoring.

• 지질공학
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• 제28권2호
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• pp.247-258
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• 2018

포항분지 해상 중규모 실증 모니터링 연구팀은 영일만의 해상 $CO_2$ 주입 실증 사이트에서 주입되는 $CO_2$를 모니터링하기 위하여 지구물리-지화학 복합 모니터링 연구를 수행하고 있다. 이 연구에서는 주입 전 모니터링 탐사의 1차 결과로서, 지구물리 탐사에서는 한국형 Hydro-Geophone OBS (Ocean Bottom Sensor) 탐사장비 개발 현황과 3D 탄성파 탐사의 결과를, 천부 지화학 탐사에서는 주입사이트의 주입 전지화학 베이스라인 탐사(퇴적물 공극수의 음이온)에 대한 예비결과를 제시하였다.

• 한국정밀공학회지
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• 제31권7호
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• pp.561-567
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• 2014

Precision injection mold is an essential element in order to manufacture small and precision plastic lenses used for phone camera. There are many critical factors to meet the requested specifications of high quality plastic lenses. One of the main issues to realize high quality is minimizing decenter value, which becomes more critical as pixel numbers increases. This study suggests the method to minimize decenter value by modifying ejecting structure of the mold. Decenter value of injection-molded lens decreased to 1 ${\mu}m$ level from 5 ${\mu}m$ by applying suggested ejecting method. Also, we also developed BIS (Built-in Sensor) based smart mold system, which has pressure and temperature sensors inside of the mold. Pressure and temperature profiles from cavities are obtained and can be used for deduction of optimal injection molding condition, filling imbalance evaluation, status monitoring of injection molding and prediction of lens quality.

• Geomechanics and Engineering
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• 제24권1호
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• pp.1-14
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• 2021

In this study, a new approach using electrical resistivity measurement was proposed to detect grout penetration and to evaluate the grouting performance for such as waterproof efficiency in single rock fracture. For this purpose, an electrical resistivity monitoring system was designed to collect multi-channel data in real time. This was applied to a system for grout injection/penetration using a transparent fracture replica with various aperture sizes and water-cement mix ratio. The electrical resistivity was measured under various grout penetration conditions in real time, which results were directly compared to the visual observation images of grout penetration/distribution. Moreover, the grouting success status after the curing process was evaluated by measuring the electrical resistivity in relation to changes in frequency in fracture cells where grout injection and penetration were completed. Consequently, it was determined that the electrical resistivity monitoring system could be applied effectively to the detection of successful penetration of grouting into a target area and to actual field evaluation of the grouting performance and long-term stability of underground rock structures.

• 한국동물생명공학회지
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• 제36권4호
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• pp.175-182
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• 2021

Pluripotent stem cells could self-renew and differentiate into various cells. In particular, porcine pluripotent stem cells are useful for preclinical therapy, transgenic animals, and agricultural usage. These stem cells have naïve and primed pluripotent states. Naïve pluripotent stem cells represented by mouse embryonic stem cells form chimeras after blastocyst injection. Primed pluripotent stem cells represented by mouse epiblast stem cells and human embryonic stem cells. They could not produce chimeras after blastocyst injection. Populations of embryonic stem cells are not homogenous; therefore, reporter systems are used to clarify the status of stem cells and to isolate the cells. For this reason, studies of the OCT4 reporter system have been conducted for decades. This review will discuss the naïve and primed pluripotent states and recent progress in the development of porcine OCT4 reporter systems.

• 대한치과마취과학회지
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• 제3권2호
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• pp.87-91
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• 2003

Background: The purpose of this study was to compare the availability of propofol and fentanyl (P + F) with diazepam and morphine (D + M) for intravenous conscious sedation during third molar surgery. Methods: Forty patients without systemic disease were operated under IV conscious sedation administered by either of the two techniques. Monitoring consisted of continuous observation of pulse rate, blood pressure, oxygen saturation, and the respiratory rate and were recorded every 15 minutes. Cooperation score was measured 5 and 15 minutes after induction of IV sedation. Following the operation, the surgeon and patients completed questionnaires including pain visual analog scale, amnesia, and side effects. Results: The P + F group was significantly more cooperative than the D + M group. The side effects of D + M group included pain on injection, nausea/vomiting and abdominal pain. The side effects of P + F group included talkativeness, nausea/vomiting, temporary apnea, pain on injection and vertigo. Conclusions: In this study, there were following benefits in the P + F group; more cooperative status and less pain perception. But respiratory depression developed in some patients.

• 한국습지학회지
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• 제17권2호
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• pp.118-123
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• 2015

제강산업의 냉연 산회수 설비공정을 검토하였고, 공정에서 발생되는 염화수소 가스를 처리하기 위하여 마이크로버블이 발생되는 DIWS 시스템을 운전하였다. 염화수소 가스의 대기배출허용기준을 만족하기 위해서는 추가공정의 도입이 필요한 것으로 나타났다. DIWS 장치로 유입되는 평균 염화수소 가스의 농도는 22.3 ppm, 배출가스의 농도는 0.59 ppm으로 평균 제거율은 97.3%였다. TMS 장치에 의한 10시간 5분 간격 측정에서도 평균 0.69 ppm으로 안정적이었으며, 수동으로 측정하여 TMS 장치의 신뢰도를 검증하였다.