• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 2002년도 ICCAS
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• pp.32.5-32
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• 2002

Processing plasmas are playing a crucial role in either depositing thin films or etching fine patterns. Any variability in process factors (such as radio frequency power or pressure) can cause a significant shift in plasma state. When this shift becomes large enough to change operating condition beyond an acceptable level, overall product quality can greatly be jeopardized. Thus, timely and accurate diagnosis of plasma malfunction is crucial to maintaining device yield and throughput. Many diagnostic systems have been developed, including HIPOCRATES [1] and PIES [2]. Plasma equipment was also diagnosed by combining neural network and expert system called Dempster-Schafer Theory [3]. A fact c...

• 디지털융복합연구
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• 제12권2호
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• pp.555-561
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• 2014

총 5대를 대상으로 한 진단용X선발생장치(DR)는 IEC 60601-2-54 표준규격에서 제시한 방사선출력의 재현성 시험에서 4대가 적합으로 나타났으며, 다만 1대의 X선 장치에서 C Group의 시험 설정인 진단용X선장치의 최고 관전압의 50%와 관전류 시간 곱(mAs)이 $1{\mu}Gy$에서 $5{\mu}Gy$ 사이의 인가출력량의 조합으로 측정한 항목에서 부적합으로 나타났다. 이에 따라 방사선량을 정량화하기 위한 표준으로 IEC 60601-2-54 표준규격에서 제시한 방사선출력의 재현성이 진단용 X선 영상장치 성능관리에 중요한 평가 요소임을 인식해야 한다.

• 의료법학
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• 제23권2호
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• pp.97-118
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• 2022

의료기관에서 진단용 방사선의 이용은 매년 급속히 증가하고 있다. 또한 집단 유효선량도 매년 증가하고 있다. 그러므로 국민에 대한 방사선 피폭을 최대한 적게 낮추어야 하며, 진단용 방사선 안전 관리를 효율적으로 할 수 있도록 제도적으로 확립하여야 한다. 이에 진단용 방사선 안전관리에 대한 법적 규율이 법령체계상 맞지 않거나 내용에 있어서 현실과 괴리가 없는지 문제점을 파악하고 그에 대한 개선 방향을 모색하여 다음과 같은 결과를 얻었다. 첫째, 「의료법」에는 검사·측정기관에 대한 근거 규정도 없고 행정처분에 대한 위임규정도 없다. 그러므로 「의료법」 에 검사·측정기관에 대한 근거 규정과 이들 기관들에 대한 행정처분의 근거 규정을 두어 법적 정당성을 확보해야 한다. 둘째, 진단용 방사선 특수의료장비에 대해서는 「특수의료장비의 설치 및 운영에 관한 규칙」과 「진단용 방사선 발생장치 안전관리에 관한 규칙」을 통합하여 신고 등 행정적 절차를 일원화해야 한다. 셋째, 「진단용 방사선 발생장치 안전관리에 관한 규칙」 상 진단용 방사선 안전관리기준을 위반한 경우에 행정처분 등 제재가 미비된 사항들을 보완할 필요가 있다. 넷째, 의료기관에서 이용하는 진단용 방사선과 치료용 방사선에 대하여 「의료법」과 「원자력안전법」의 이원적인 법령 체계로 규율하는 것은 진단용 방사선 안전관리에 있어서도 효율적이지 못하다. 따라서 진단용 방사선뿐만 아니라 치료용 방사선, 핵의학을 포함한 의료용 방사선 전체를 「의료법」 체계에서 통일하여 규율하는 것이 필요하다고 본다.

• 한국임상수의학회지
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• 제40권6호
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• pp.429-437
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• 2023

In veterinary medicine, most radiographic images are obtained by restraining patients, inevitably exposing the restrainer to secondary scattered radiation. Radiation exposure can result in stochastic reactions such as cancer and genetic effects, as well as deterministic reactions such as skin burns, cataracts, and bone marrow suppression. Radiation-shielding equipment, including aprons, thyroid shields, eyewear, and gloves, can reduce radiation exposure. However, the risk of radiation exposure to the upper arms, face, and back remains, and lead aprons and thyroid shields are heavy, restricting movement. We designed a new radiation-shielding system and compared its shielding ability with those of conventional radiation-shielding systems. We hypothesized that the new shielding system would have a wider radiation-shielding range and similar shielding ability. The radiation exposure dose differed significantly between the conventional and new shielding systems in the forehead, chin, and bilateral upper arm areas (p < 0.001). When both systems were used together, the radiation-shielding ability was better than when only one system was used at all anatomical locations (p < 0.01). This study suggests that the new radiation-shielding system is essential and convenient for veterinary radiation workers because it is a step closer to radiation safety in veterinary radiography.

• 한국전기전자재료학회논문지
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• 제29권7호
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• pp.449-453
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• 2016

The amount of electrical energy has been increased with the rapid development of the industrial society. Accordingly, operating voltage of the power equipment and facility capacity are continuously increasing. Development trends of recent high-voltage electrical equipment are ultra high-voltage, large-capacity and compact. Early diagnosis of a failure of the power plant has been emerging as an important task as to supply high quality power to users. In this study, we have tried to develope an algorithm for distinguishing an arc fault signal generated in the power plant by using UV sensor.

• Journal of electromagnetic engineering and science
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• 제10권4호
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• pp.244-249
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• 2010

Recent development of magnetic resonance imaging (MRI) equipment enables interventional radiology (IVR) as diagnosis and treatment under MRI usage. In this paper, a new methodology for magnetic resonance (MR) scanner to apply not only diagnostic equipment but for treatment one is discussed. The temperature measuring procedure under MR is to measure phase shift of $T_1$, which is the longitudinal relaxation time of proton, for the position inside a sample material with the application of pulsed RF for heating inside the sample as artificial dielectrics. The result shows the possibility to apply MR as temperature measuring equipment and as a heating equipment for applying such as hyperthermia heating modality.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2008년도 추계학술대회 논문집
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• pp.230-234
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• 2008

Urban Railway was used importantly with transport for several decades. This transportation facilities used electricity. When the breakdown occurs, social, the economic loss is enormous. In addition to, the power equipment was ageing. We need preventive diagnostic monitoring system in order to prevent breakdown of power equipment. In this paper, we investigates characteristic and breakdown type of the Urban Railway power equipment. Through the this research, we can contribute in the operation which power equipment is efficient of the Urban Railway.

• KSBB Journal
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• 제28권4호
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• pp.254-259
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• 2013

Herein we present a diagnostic paper chip that can quantitatively detect albumin without external electronic reader and dispensing apparatus. We fabricated a diagnostic paper chip device by printing wax barrier on the paper and wicking it with citrate buffer and tetrabromophenol blue to detect albumin in sample solution. The paper chip is so simple that we dropped a sample solution at sample pad and measure the ratio of two travel distances of the sample solvent and albumin under the name of retention factor. Our result confirmed that the retention factor was constant in the samples with same concentration of albumin and useful determinant for the measurement of albumin concentration. The paper chip is affordable and equipment-free, and close to ideal point-of-care test in accordance with the assured criteria, outlined by the World Health Organization. We assume that this diagnostic paper chip will expand the concept of colorimetric determination and provide a inexpensive diagnostic method to aging society and developing country.

• 한국전기전자재료학회논문지
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• 제29권10호
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• pp.635-640
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• 2016

This paper dealt with the deterioration characteristics and an on-line diagnosis equipment for SPDs (surge protective devices). An accelerated aging test was carried out using a $8/20{\mu}s$ standard lightning impulse current to analyze the changes of electrical characteristics and to propose the diagnostic parameters and the criterion for deterioration of ZnO varistor which is the core component of SPDs. Based on the experimental results, an on-line diagnosis equipment for SPD was fabricated, which can measure the total leakage current, reference and clamping voltage. The leakage current measurement circuit was designed using a low-noise amplifier and a clamp type ZCT. A linear controller, the leakage current measurement part and a HVDC were used in the measurement of reference voltage. The measurement circuit of clamping voltage consisted of a surge generator and a coupling circuit. In a calibration process, measurement error of the prototype equipment was less than 3%.

• 지능정보연구
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• 제6권1호
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• pp.97-112
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• 2000

The basic idea of case-based reasoning is to solve a new problem using the previous problem-solving experiences. In this research we develop a case-based reasoning system for equipment malfunction diagnosis. We first divide the case base into clusters using the case-based clustering technique. Then we develop an appropriate case-based diagnostic system for each cluster. In other words for individual cluster a different case-based diagnostic system which uses different weights for attributes is developed. As a result multiple case-based reasoning system are operating to solve a diagnostic problem. In comparison to the performance of the single case-based reasoning system our system reduces the computation time by 50% and increases the accuracy by 5% point.