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김영표,백종현,김철만,김우식,Kim, Young Pyo,Baek, Jong Hyun,Kim, Cheol Man,Kim, Woo Sik 한국압력기기공학회 2009 한국압력기기공학회 논문집 Vol.5 No.2
The dominant incidents category for onshore and offshore natural gas transmission pipelines in the world is associated with outside forces. Incidents in the outside forces category embrace acts of nature, which typically cause widespread structural damage, as well as act of man, whose effects tend to cause dents and/or gouges localized at point of contact that are referred to as mechanical damage. Therefore, these damage types must be better addressed to avoid unnecessary and costly repairs and the possibility of catastrophic events. First of all, the characterizing features of mechanical damage in gas pipelines were evaluated by using of excavator or boring machine. There is no reliable method for evaluating the safe operating pressure of pipeline affected by mechanical damage. It is especially important to evaluate the remaining strength of damaged pipelines due to outside force. Therefore, the full scale burst tests were conducted to evaluate the remaining strength of pipe with mechanical damage that combines a dent and a gouge. This paper is supposed to provide information that will assist in developing a criterion to assess serviceability in pipelines with mechanical damage.
김영표,김종순,이승철,전인기 ( Young Pio Kim,Jong Soon Kim,Seung Churl Lee,Inn Ki Chun ) 대한피부과학회 1990 대한피부과학회지 Vol.28 No.5
N/A Clinical observation of Cutaneous Manifestations in the Renal Transplanted Patients Young Pio Kim, M.D., Jong Soon Kim, M.D., Seung Churl Lee, M.D., Inn Ki Chun, M.D. Department of Dermatology, Chonnam University Medical School, Kwangju, Korea The Author performed a clinical study in order to investigate cutaneous manifestations in the renal transplanted patients. The 47 patients, who were treated with renal transplantation and dialysis, between June 1988 and January 1990, in the department of general surgery and internal medicine, at Chonnam University Hospital. The results were as follows 1. The incidence of cutaneous manifestations were 83%(39/47). 2. The incidence of each cutaneous manifestations wrer pruritus(66%) xerosis(46.8%), decrease in sweating(34%), hyperpigmentation and easy bruising(29.8%), nail change(25.5%), delayed wound healing(23.4&%) 3. .Among 31 patients with pruritus, 24(77.4%) were marked relief, 5*16.1%) were no particular change, and 2(6.5%) were aggravation of pruritus after renal transplantation. 4. There was no correlation between the severity of pruritus and duration of chronic renal failure, the level of calcium(Ca), Ca ×phosphorus, and alkaline phosphatase. But there was a positive correlation between the severity of pruritus and the level of blood urea nitrogen(p<0.01). 5. The incidences of cutaneous disorders of the 47 renal transplanted patients treated with immunosuppressive agents were as follows ; cushingoid features(80.9%), dermatophytosis(29.8%), viral infection(25.5%), and alopecia(12.8%) were found. 6. There was no statistically significant difference in HLA-typing of the 47 renal transplanted patients with normal Korean. (Kor J Dermatol 28(5) : 587-596, 1990)
김영표,백종현,김우식,고영태,Kim, Yeong-Pyo,Baek, Jong-Hyeon,Kim, U-Sik,Go, Yeong-Tae 대한기계학회 2002 大韓機械學會論文集A Vol.26 No.1
The transmission pipeline industry spends many millions of dollars annually performing inline inspections, excavating sites of possible corrosion, and repairing or replacing damaged sections of pipe. New criteria fur evaluation of the integrity of corroded pipe have been developed in recent years to help in controlling these costs. These new criteria vary widely in their estimates of integrity and the most appropriate criterion fur a given pipeline is net always clear. This paper presents an overview, comparison and evaluation of acceptability criteria for corrosion deflects in pipelines. By full scale burst tests, this paper has assessed the relative accuracy of each of theses criteria in predicting burst pressure. Many of the criteria appear to be excessively conservative and indicate that deflects must be repaired when none is needed, based upon burst test data.
전파정류방식의 고전압발생장치를 이용한 X선 기기의 특성 평가
김영표,김태곤,이호식,박용필,천민우,Kim, Young-Pyo,Kim, Tae-Gon,Lee, Ho-Shik,Park, Yong-Pil,Cheon, Min-Woo 한국전기전자재료학회 2009 전기전자재료학회논문지 Vol.22 No.6
X-ray system which is usefully used in diagnosis of the patient, being bombed of radioactivity is a big weak point when irradiates a X-ray to the human body so that ICRP restricted the radiation exposure tolerance of the human body. In order to reduce being bombed, the many research and development is now advanced. A lots of diagnostic X-ray machines have currently used due to the increase of occurrence efficiency of X-ray and precisely the output control by using the inverter which is a high speed switching semiconductors. For getting the confidence of the X-ray machine, the same radiation occurrence, same evaluation, and same irradiation condition are necessary when evaluates X-ray irradiation. It is the most important part for the accuracy of the test result and the patient safety. This research has produced the high voltage occurrence system of full-wave rectification method by using the LC resonance inverter, and evaluated the irradiation reproducibility in order to use it in diagnosis of the patient.
김영표,전인기,하범석 ( Young Pio Kim,Inn Ki Chun,Bom Seock Ha ) 대한피부과학회 1989 大韓皮膚科學會誌 Vol.27 No.5
Taenia aolium is responsible for producing human intestinal infection with the tapeworm (taeniasis) and the lodging of the larval stage (Cysticercua cellulosae) in numerous organs. especially subcutaneous tissue with the prodution
인버터방식의 고전압 발생장치를 이용한 의료용 X선 기기의 특성평가
김영표,천민우,박용필,Kim, Young-Pyo,Cheon, Min-Woo,Park, Yong-Pil 한국전기전자재료학회 2011 전기전자재료학회논문지 Vol.24 No.1
Medical X-ray has been brought many changes according to the rapid development of high technology. Especially, for high-voltage generator which is the most important in X-ray generation the traditional way is to use high-voltage electric transformers primarily. However, since it is large and heavy and the ripple rate of DC high-voltage applied to X-ray tube is too big, it has a disadvantage of low X-ray production efficiency. To solve these problems, the studies about high-voltage power supply are now proceeding. At present, the high-voltage generator that generates high-voltage by making high frequency using inverter control circuit consisting of semiconductor device is mainly used. High-voltage generator using inverter has advantages in the diagnosis using X-ray including high performance with short-term use, miniaturization of power supply and ripple reduction. In this study, the X-ray high-voltage device with inverter type using pulse width modulation scheme to the control of tube voltage and tube current was designed and produced. For performance evaluation of produced device, the control signal analysis, irradiation dose change and beam quality depending on the load variation of tube voltage and tube current were evaluated.
김영표(Youngpyo Kim),김철만(Cheolman Kim),백종현(Jonghyun Baek),김우식(Woosik Kim) 대한기계학회 2008 대한기계학회 춘추학술대회 Vol.2008 No.5
Among the damage that can occur gas pipeline leading to corrosion and mechanical defect by external load as like gouge and dent. Gouge, dent and gouge/dent caused by external load reduce the burst pressure of gas pipeline due to thickness reducing, changes in material properties and stress concentration. Pipeline companies should establish for fitness-for-service assessment method for pipeline defect and need company criteria for pipeline integrity assessment. In this study, we tested the burst pressure of gouge pipe using the full scale pipe burst test facility, and predicted the burst pressure of gouge pipe with various forms using computer finite element method. We developed the optimal engineering limit load equation and established the FFS assessment method of gouge pipe for pipeline operation and maintenance with safety and efficiency.