한국근대미술사 서설

이경성 한국근현대미술사학회 1998 한국근현대미술사학 Vol.6 No.-

흉부 X선 사진의 화질 향상을 위한 기술인자와 화질평가방법 검토

이경성 제주한라대학 1997 論文集 Vol.21 No.-

The purpose of this article was to provide the foundation to establish the standardized evaluation method for chest X - ray film, so to improve the image quality of the film. To this purpose, the technical factors related to the chest X - ray film were reviwed and the evaluation methods were analized. Chest radiography is one of the most important radiologic method for diagnosis. It is one of the technique that has low cost, low difficulty, and high diagnostic value, so has been used in clinics longly and widely. Chest is composed of two fields, mediastinal and lung field that have the different absorption rate of X - ray. This differnce requires to consider the different exposure conditions to take the films. It has been found out the methods to take the the chest film only once to illustrate the two fields properly. It needed to consider the various factors to take the film. The factors have to be considered that include kVp, mAs, distance, grid, screen, film, postion and respiration state of client ect.. But it is not yet up to consider the technical factors. It is to need to understand the evaluation methods based to anatomical index too. There are the evaluation methods of the chset film that were proposed J. J. Vicuch (B. R. H) and Japan Tb Prevention Association ect.. It requires to analyze the technical factors related to take the film and to evaluate objectively the result, to improve the image quality of chest film.

現代工藝의 諸問題 - 方向과 狀況

李慶成 弘益大學校 1969 弘大論叢 Vol.1 No.-

韓國彫刻의 近代的 過程

李慶成 弘益大學校 1970 弘大論叢 Vol.2 No.-

Sculpture has had a rocky road to travel on its way to becoming established as an independent art in Korea. This can be ascribed to the sculptor himself, as a creator doesn't know what be is and wbat his mission is, and to the shortoge of some ideas within sculpture so that it may become a part of art. We have inherited a highly sophisticated aesthetic sence of sculpture since the age of the three Kingdoms. Moreover, the devout faith of many in Buddhism has produced many sculptures for Buddhist image. Sculpture belongs to mass, the third dimension of space, thus the sense of volume and weight along with the visual outlook of sculpture should be introduced from Western ideas of sculpture so as to make the existing sculpture complete. We have learned the great ideas of Donatello, Michelangelo, Augu se Rodin and Moore in order that we may understand the original character of sculpture. Eesides we must seek and adopt the aesthetic sides from them. Henry Moore once stated in his book "Notes on Sculpture", which provide us with tremendous help for the improvement of our sculpture. "A sculptor should be aware that form occupies space. In other words he should sense the objects with his own hands regardless of size. He visualizes all his surroundings into a complicated form. He is able to sense every side of the form in his mind, identifying the focus of gravity, volum, weight and himself. So the sculptor feels the volume as a space as if he moved the form in the air." Such a fundamental definition of the art of sculpture has been required for us to understand sculpture as part of aesthetics. Therefore sculpture has had to overcome many difficulties to be established as an independent art with creative principles and criteria. The first task confronting sculpture was to be free from religious suppression. Such idea of separation has been impossible without social changes, but human life in modern society contains every thing which has made it possible. Another task is that efforts for imagination and at least mental efforts should be made to complete the art of sculpture for the third dimension of space beyond the primary dimension. Speaking in other words, elements involved in the sense of the space and volume had to be overcome. After these two tasks are overcome another phase the sculptor is confronted with is to create an object in the third dimenstion of space. Painting makes us feel illusions of space through the second dimension, but the aim of the sculptor is to find the space itself with the sensed volume. An object is situated in space and it ocoupies a part of space or moves somewhere. The object is distinguished from othors in the space and is limited by its surroundings. And it appears to us as another object. We have sense of volume in the space occupied by the object. That is the volume. This sense of volume in space becomes perfect with the development of human intelligence. For the sense of space is composed of intelligence. Likewise modern sculpture in Korea is established as a seneed space with the advancement of intelligence and the realization of a sense of volume. But this establishment is not yet accomplished. It is still under way. Our whole culture is still groping for modernization in so-called backwardness, so sculpture 'too, can not avoid being in this category. It can only be pointed out that modernization channeled through Japan. This historical process will be explained concretely. In a way, this is only a display of all the materials which can be called a test case without highly aesthetic definition. They are classified by items as follows: First, Korean sculpture during Japanese ruling, (1910-45) second, Korean sculpture after independance (1946-56), third, Korean contemporary sculpture (1957-60). For a long time in such a sterile country as Korea suffering from Asiatic backwardness, it was regarded as natural what we should undergo modernization since modern sculpture hes Leen es Fablpture Fablished after the imitation and implantation, armed with strong spirit. Despite the long tradition of excellent and beautiful sculptur, since the Three Kingdom, we have dispised our own works. In this particular situation, it is due to the Western influence that Korean sculpture was able to start again as an art. That is to say, our modorn sculpture has ripened in an implanted atmosphere from the West rather than in indigenous one. To be sure, this is a tragedy. That we have made a false attempt to formato our art on the basis of foreign things, ignoring our own traditional one, has brought about confusion and a waste of time, This pitiful aspect, however, is not a characteristic which is unique in sculpture only, in our country where the traditional stage changed abruptly into the modern one with hardly any transitional period. It is seen in every field - economic, politics and culture. But the modern world of ours is pursuing an indentfication. compelling us to have one stream of conciousness. The sphere of sculpture is no exception in following this trend. The fact that Korean sculpture of today keeps in touch with that of the whole world could be a good example. It is in search of selfdiscovery in the realm of the formative arts from the stand point of the most nationalistic peculiarities, beyond the problems of style and raw materials. The march of modern sculpture towards originality under the given conditions may well be called an epic of modern times. This epic should be worked by a few sculpturs with a touch of genius in the background of this society. What we need badly are not hundreds of would be sculptors, but a few geniuses who will suspend the backwardness by their heroic actions. We can easily understand this when we see that the sauep pere during Renaissance is greatly infeuenced by one man. Michelangelo, and the sculpture of the 19th century by Rodin. Modern sculpture of Korea - that has just begun. And all the problems unsolved should be presented, interpreted and overcome from this very moment.

의료에서의 레이저 이용과 방사선사의 역할

이경성 제주한라대학 1991 論文集 Vol.15 No.-

LASER is an acronym for Light Amplication by Stimulated Emission of Radiation. Application of laser has become pervasive and has become the most advanced available technology for a grear number of scientific fields including medicine. The needs to understand the theories of laser and to applicate it are increasing. So this article discussed the physical characteristics and types of laser, it's use for medical field. The examples of medical application are for the treatment such as the laser blade, the laser coagulator and the laser endoscope, and for the image data processing such as the holography, laser imager, digital radiography. Increased uses of the laser are expected to change the medical system and the roles of members of medical team. At this point the role of radiological technologist must be considered in the field of laser medicine. Because laser is a kind of radiation, radiological technologist must partcipate as a member of medicine in that field including the operation and the safety control of laser, specially image data processign by laser. To play that role, he should acquire the knowledge and the technique of laser and should increase the interests and the studies to develop the laser technology.

진단방사선부서 업무전산화에 대한 연구

이경성 대한방사선과학회(구 대한방사선기술학회) 1987 방사선기술과학 Vol.10 No.1

^(99)Mo-^(99m)Tc Generator에 관한 考察

李京聲 제주한라대학 1985 論文集 Vol.9 No.-

Today, technetium-99m has become firmly established as the radionuclide most widely used in nuclear medicine. It is of prime importance of to maintain an adequate supply of it and to ensure that it is safe to use. The generator most frequently used in the ^(99)Mo-^(99m)Tc generator, Molybdenum-99 may be obtained either as a carrier-free product of U-235 fission in a reactor or by neutron irradiation of Mo-98 in a cyclotron. The most commercial Tc-99m generators are based on column chromatography. Two other methods for sperating Tc-99m fromMo-99 have been developed, althought neither is used as often as the saline elution system. Two other mothods have been proposed; organic solvent extraction and sublimation. The principal index of performance of ^(99m)Tc is its radio nuclidic purity. From the stand point of patient radiation safety, the amount of ^(99)Mo should be kept to a minimum. The maximum amounts, according to the U.S. Pharmacopeia (USP) XIX (1975), are 1 μCi ^(99)Mo/mCi, ^(99m)Tc not to exceed 5 μCi per administered dose.

核醫學 檢査時 Compton 散亂으로 因한 僞像形成

李京聲 제주한라대학 1984 論文集 Vol.8 No.-

Ln a radionuclide study, Tc- 99^(m) Photons from the other Position RI may Scatter in the Superficial tissue of the body, resulting in an false image. Ln a scintillation camera Peaked at 14OKeV with a 20% window, any Scattered Photons with a Scatter angle of less than 53.5 ° may be Counted in the Tc- 99^(m) window. This Scatter angle is large enough to allow Counting of many Secondary Photons from Campton Collisions in an area quite distant from the radioactive Source to be Counted, Provided the Scatter area and Source are Separated by air.

대학생의 정보화 교육을 위한 기초 실태 조사

이경성,이건효,성현정 성균관대학교 학생생활연구소 2000 學生指導硏究 Vol.12 No.1

디지탈X선영상에 관한 고찰

이경성 제주한라대학 1988 論文集 Vol.12 No.-

The present trend of digital radiography is reviewed. The advantages of digital radiography are ① improvement of diagnostic accuracy, ② economical efficiency of image storage, ③ progress of quality of medical service. And the methods of digital radiography are utilizing scanning laser stimulated luminecence (area beam digital radiography), and X-ray fan beam and linear diode arrays (scanned projetion radiography). To practical use of digital radiography, the development of educational program for staff of radiological department and the regulation defining duties should be performed.