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황선철,이창규,김혜순 高麗大學校 倂設 保健大學 保健科學硏究所 1989 保健科學論集 Vol.16 No.1
A total number of licenses issued for medical technologists by the year of 1989 are 14,961 and that of physician are 40,353. The population of the country the year reached to 43.5million, and the total number of hospital beds are 126.329. These figures show that the ratios of physician, hospital bed and population to a medical technologist are 2.3, 8.4 and 2,910, respectively. The statistics apparently mean that medical technolpgists are already over produced by the year of 1989. Despite the recommendation for the hospital standardization was long ago made to place one medical technologist for 10 hospital beds, average number of beds imposed to one medical technologist are 21.3 while daily work loads handled are 106.3 clinical samples. It is argued that the production of medical technologist should be depressed gradually, and in the meantime, the compliance of the recommendation set by the hospital standardization act also should be enforced to develop patient care service and maintain adequate balance of the production and demand of medical man power, especially the medical technologist.
새로운 선택배지를 이용한 Klebsiella 균종의 조기분류동정에 관한 실험
황선철 高麗大學校 倂設 保健大學 保健科學硏究所 1985 保健科學論集 Vol.14 No.1
Genus Klebsiella became awesome microflora lately, though the genus once thought as an enteric normal inhabitant, causing opportunistic infections in various occasions. As the species within the genus has been encountered very often in opportunistic complications, particularly in the cases of immunocompromised patients. The rapid and accurate isolation and identification of the species from not only fecal specimens, but also from vegetables, fruits and other possiblly contaminated drinking water sources have become necessary in public health laboratory. To meet this need, 300 fecal and sewage specimens had been inoculated on the newly developed selective media(SCAI and MIC) using characteristic utilization of sodium citrate as sole carbon source and fermenting ability of inositol. The percentiles of primary classification of Klebsiella species from isolating plates, SCAI and MIC, were 22% and 69.5% from fecal specimens, and 52% and 84% from sewage specimens, respectively. Species classification within the genus was further attempted using secondary identification pattern, addition of KIA and SIM to the process, and more reliable data were obtained. The rate of K. pneumoniae from fecal specimens in SCAI and MIC were 61% and 64%, and from sewage specimens were 73.3% and 65.3%, respectively. MICRO-ID System was further included in the study to confirm the results obtained by the test tube method, and found 100% agreement between the two methods in classifying the species of the genus. Consequently, with simple modification of the conventional selective and differential media pins two other routine media (KIA and SIM), The Genus Klebsiella or species in the genus can be easily and rapidly classified.
황선철 高麗大學校 倂設 保健大學 保健科學硏究所 1985 保健科學論集 Vol.14 No.1
Though normal healthy urine has been thought to be antimicrobial in some degree, it is more obvious that the antimicrobial activity of urine is mainly due to the residual antimicrobial effect. Detection of antimicrobial activity of urine could be a rapid and definitive index of the remaining antibiotics or chemotherapeutic agents in the body which means that the patient took antimicrobial agents lately. It is shown that more than 40% of the specimens tested displayed certain degree of antibacterial activity against one or more bacterial species. The figure is much higher than that of other reports. Such a high antimicrobial activity of the urines could be contributed by the abuse of antibiotics or chemotherapeutic agents. It is also urged, from the results of the experiment, the controlled use of antimicrobial agents is very essential.
기하학적 공격 및 비트율 변화 공격에 강한 MPEG-2 동영상 워터마크 시스템 개발
황선철(Seon-Cheol Hwang) 대한전기학회 2010 전기학회논문지 P Vol.59 No.3
This paper describes a watermarking system that has the robust characteristics against the geometric attacks of resizing and the bitrate varying attacks. While the existing watermark methods of marking on AC in DCT coefficients are weak against the geometric attacks, the methods of tiny increasing the DC in DCT coefficients and the system implementations are suggested in this paper. We measure the differences between the original images and the watermarked images and the detecting rate from the geometric and bitrate attacked images. Results of experiments show that our method is robust against that attacks.
API 20E System을 利用한 腸內細菌에 관한 實驗
黃善哲 高麗大學校 倂設 保健大學 保健科學硏究所 1979 保健科學論集 Vol.10 No.1
Twelve strains of Gram negative bacilli(lactose fermenters and non-fermenters) were tested eight times, four times to the experienced medical technologists and four times to the medical technology students, in each of a set of conventional tests and in the API 20E, The results obtained were analysed for test reproducibility within each test, correlation of the tests, the identification of the strains, and proficiency between the experienced technicians and the students. The overall superiority of the API 20E system over the conventional procedures in the identification was found. The use of the standard strains to set up the routine quality control program in clinical bacteriology was highly recommended. In addition to the overall superiority, the API 20E system also provided us economic advantages in cost, time and space, etc.
황선철 ( Sun Chul Hwang ) 대한외상학회 2012 大韓外傷學會誌 Vol.25 No.1
Pencils are common instruments for children to use and play with. This report describes an unusual penetrating orbitocranial injury in a 5-year-old girl who was struck in her facewith a pencil. She was holding it at a desk, and her friend pushed her back. The pencil penetrated the left lower eyelid and went deep into the right frontal lobe through the base of the skull. It was removed at the emergency room, after which brain CT was performed to detect the development of an intracranial hematoma. No complications occurred after conservative management with antibiotics and an antiepileptic drug. Pencils can be hazardous to children, and a penetrating head injury with a pencil may be managed without cranial surgery. (J Korean Soc Traumatol 2012;25:28-31)
전문대학 임상병리과 졸업자들의 학위취득을 위한 방안모색
황선철,윤효숙 高麗大學校 倂設 保健大學 保健科學硏究所 1994 保建科學硏究論集 Vol.3 No.1
The baccalaureate and further degree programs can be materilized through modification of the junior college curricula, revision of minor parts of the current law or regulations, expanding curriculum of the present correspondence education program and opening of university's credit-based auditing program. The curricula of junior colleges should be re-designed, and names of courses also should be developed to be transferred to other colleges and universities. And universities should open and expand their auditing courses in variety of major subjects so that credits earned from junior colleges can directly be acceptable to fit into the their own curricula. Next, it is suggested that establashment of a new government level organization where handles credit evaluation of the junior college earned credits and administers baccalaureate degree qualification examnations by revising the education related law and regulations. Finally, re-modeling of correspondence education program is suggested. Present curricula of correspondence education for the baccalaureate degree are very limited and too specified for certain fields of major areas. The number of courses should be gradually increased and the areas of major fields should also be expanded, and courses or subjects of the correspondence education program should eventually be able to cover up all the education programs of the current junior college curricula.