• 대한치과기공학회지
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• 제9권1호
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• pp.57-65
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• 1987

In order to ascertain the aspects of the dental technicians training system which require improvement, and also to provide important data for use in setting up dental technicians manpower planning, our country's dental technicians training and employment status has been studied and analyzed. The objects of the survey are 2,315 dental technicians, the total number of persons licensed by The Ministry of Health and Social Affairs from 1965 to 1986. The results were as follows: 1. Education organs for dental technicians are education system such as health junior college and service training systems and 1,706 technicians have come from health junior college in our country. 2. Total number of employment of dental technicians employed in our country are, 1,541 and 406 of them are engaged in Seoul. So unbalanced employment of dental technicians will be troubled in a future. 3. All registrated to government are 4,847 till 1986, and 1,541 of them engaged are that is, we can suppose about employment of dental technicians in a future, 12,231 dental technicians will registrate to Health and Social Administration on 1996 and 3,530 of them will be able to take their job in Korea.

• 대한방사선기술학회지:방사선기술과학
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• 제10권1호
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• pp.31-35
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• 1987

Authors have investigated actual conditions of 22 hospitals throughout the Seoul district to evaluate of chest radiographic systems. The results are as followed: 1. Concerning exposure factors, most hospitals have used low tube voltage, merely two hospitals high tube voltage, that is, over 120 kVp. Roughly halves of intensifying screens have been used in hospitals were medium speed screens, and the rests were high speed screens. 2, Surface doses existed within wide range of $10{\sim}63.5mR$, and image quality value were $5.60{\sim}7.49$. 3. The minimum perceptibility of Burger Phantom have been increased with contrast improvement.

• 대한방사선기술학회지:방사선기술과학
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• 제5권1호
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• pp.15-19
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• 1982

Authors made an experiment to know the relation of surface doses and multiple factors of exposure by using grids, fields, tube voltages objects and distances and obtained the results as follows: 1. Surface doses were increased in proportion to the thickness of objects. 2. Surface doses were more influenced when irradiated fields were small and tube voltages were low. 3. Surface doses were a logarthmic proportion to the focus-object distance. 4. Multiple factors of exposure by using grid were under the control of the thickness of objects, irradiated fields and tube voltages but the relation of them were not fixed.

• 대한방사선기술학회지:방사선기술과학
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• 제8권2호
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• pp.15-19
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• 1985

The seattered-ray have a bad effect to the image of x-ray film. Therefore, to obtain the better x-ray image, the most important point is to eliminate the scattered-ray, come from the patient, and the easiest method to eliminate the scattered-ray is to use a proper grid for tube voltages. Authors made an experiment on the scattered-ray contents and the image quality in skull radiography, and obtained the results as follows; 1. The scattered-ray content in skull radiography was 83%, but it could be reduced to 35%-50% by using grid. 2. The image contrast was most increased when the using grid ratio was 8:1. 3. The image quality was not influenced by the scattered-ray contents between 32% and 45%.

• 대한물리치료과학회지
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• 제1권2호
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• pp.251-263
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• 1994

This article considers the trend of Korea physical therapy reaearch. Because physical therapy research is important for the continued growth of the physical therapy profesion. Such research results in improved patient care and heightens the professional standing of the physical therapy field. The purpose of this article is to discuss a current research trend and to suggest a direction for developing a physical therapy research. We discussed a research design, purposes, and methods. Measurement are fundamental to the practice of physical therapy. The physical therapy evaluation is the foundation for the measurement of the outcome of our therapertic intervention. And we must measure thess outcomes. Achieving a high quality of physical therapy practice requires us to evaluate the client, selecting and adminstering a variety of tests and measurent. For the future study, physical therapist has a good treatment model and research program for evaluating and assessment.

• 대한전기학회:학술대회논문집
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• 대한전기학회 1988년도 추계학술대회 논문집 학회본부
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• pp.281-282
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• 1988

In order to the reactive power compensation utilized static var Generator(SVG). It was generated either lagging or leading and improved reactive current waveforms using a PWM method.

• 대한방사선기술학회지:방사선기술과학
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• 제14권2호
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• pp.33-36
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• 1991

• 대한방사선기술학회지:방사선기술과학
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• 제9권1호
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• pp.131-135
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• 1986

The reciprocity law failure of the blue sensitive screen-film system was treasured, by authors. As a result, it has been found that reciprocity law failure is mote likely to occur at lower exposure, lower density and higher development temperature.

• 대한전기학회:학술대회논문집
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• 대한전기학회 1997년도 하계학술대회 논문집 D
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• pp.1177-1179
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• 1997

In this paper, short-term power demand forecast using exclusion of week periodicity presented. Week periodicity excluded from weekday change ratio. Forecast term of five and multiple regression model of the three form was composed. Forecast result was good. Therefore, It Could be the power demand forecast of special day(weekend). This method may contribute improvement of forecast accuracy.

• The Journal of Korean Physical Therapy
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• 제4권1호
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• pp.95-100
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• 1992

Due to the selectivity of the involvement by the M, leprae, the deformities are characteristic ones. It is estimated that from $25\%\;to\;88.4\%$ of the patients with leprosy possess deformities are numerous and often multiple. The chief modalities employed in physical therapy of the leprosy are : Paraffin baths, oil massages, foot baths, exercises, splinting.