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강성(剛性) 고정(固定)이 성장중(成長中)인 가토(家兎)의 전두비골봉합(前頭鼻骨封合)에 미치는 영향(影響)에 관(關)한 연구(硏究)
김효종,김여갑,Kim, Hyo-Jong,Kim, Yeo-Gab 대한악안면성형재건외과학회 1994 Maxillofacial Plastic Reconstructive Surgery Vol.16 No.3
This study was aimed to clarify the histopathological changes in the experimental animal model subjcted to rigid fixation performed across the frontonasal sutrue in growing rabbits. Sixteen rabbits aged 6 weeks used. In experimental group(n=12), rigid fixation with miniplates and screws was performed across the frontonasal suture. Control group(n=4) was those with periosteal elevation only. Experimental animals were sacrificed on the 2nd, 4th, 8th, and 12th week after operation, and frontonasal suture area was excised for light microscopic and scanning electron microscopic examination. The results obtained were as follows : 1. In control groups, collagen fiber bundles ran in the midportion of bone sutrue and cambial layers were seen at bone surface. Sutural surfaces are beveled and external and internal bony projected portions were observed. 2. In experimental groups, distance of bone suture was decreased by new bone formation on the 2nd week, while increased by bone resorption at the miniplate applied area and bone formation in the adjacent bone on the 4th week. 3. In experimental groups, the original bone surface was almost resorbed and new bone formation was found on the 8th week. Regulary-run collagen fibers, smooth and dense bone surfaces were similar to the bone patterns of control groups on the 12th week. Above results suggest that bone formation is restricted where the miniplate is applied, while compensatory growth is appeared in the adjacent bont. It is considered that rigid fixation with miniplates and acrews results in a little disturbance of sutural growth of the craniofacial bone in infancy and children when applied for short duration.
김효종,한군희,신승수,Kim, Hyo-Jong,Han, Kun-Hee,Shin, Seung-Soo 한국융합학회 2021 한국융합학회논문지 Vol.12 No.4
Recent advances in network and hardware technologies have led to active research and multiple network technologies that fuse blockchain technologies with security. We propose a system model that analyzes technologies using existing blockchain and verifies the integrity of files using private blockchain in a limited environment. The proposed model can be written as a chain code of Hyperleisure Fabric, a private blockchain platform, and verified for integrity of files through Hyperleisure Explorer, a private blockchain integrated management platform. The system performance of the proposed model was analyzed from a developer perspective and from a user perspective. As a result of the analysis, there are compatibility problems according to the version of various modules to run the blockchain platform, and only limited elements such as chain code status and groups can be checked. 최근 네트워크 및 하드웨어 기술이 발전하여 블록체인 기술과 보안을 융합하는 연구가 활발히 진행되고 여러 네트워크 기술에 적용되고 있다. 기존의 블록체인을 활용한 기술을 분석하고 제한된 환경에서 비공개 블록체인을 활용한 파일의 무결성을 검증하는 모델을 제안한다. 제안하는 모델은 비공개 블록체인 플랫폼인 하이퍼레저 패브릭의 체인코드로 작성하고 비공개 블록체인 통합 관리 플랫폼인 하이퍼레저 익스플로러를 통해 파일의 무결성 검증을 확인할 수 있다. 제안한 모델의 성능을 개발자 관점과 사용자 관점에서 분석했다. 블록체인 플랫폼을 실행하기 위한 다양한 모듈의 버전에 따른 호환성 문제가 존재하고 체인코드 상태와 그룹 등 제한된 요소만 확인이 가능하다는 결과를 얻었다.
김효종(Hyo Jong Kim),남연호(Yeon Ho Nam),김성운(Sung Woon Kim),양인명(In Myung Yang),김진우(Jin Woo Kim),김영설(Young Seol Kim),김광원(Kwang Won Kim),최영길(Young Kil Choi) 대한내과학회 1988 대한내과학회지 Vol.35 No.2
N/A Growth is an inherent property of life, The integrated function of many of the hormone, metabolic, and other growth factors is necessary for normal somatic growth, Because there are many causes of growth retardation and a vast number of laboratory determinations avail- able to exclude them, it is essential that the physician exercise restraint and select laboratory test on the basis of insights gained from the knowlege of the classification and the causes of growth retardation. Authors performed a etiologic classification and endocrinologic study of 54 patients with growth retardation to classify the categories and the causes of growth retardation and to observe the concentration of somatomedin-C in each category. The results were summarized as follows; 1) Intrinstic shortness was the most common causes of growth retardation coccuring 74% of the cases, followed by arrested growth (13%) and delayed growth (13%). 2) Chromosomal abnormalities were found in only 18 % of the patients with intrinsic shortness. 3) Definite causes were found in all the patients with arrested growth. 4) Definite causes were found in 43% of the patients with delayed growth. 5) Somatomedin-C concentration was within the normal range in all the patients with intrinsic shortness, but below the normal range in those patients with delayed growth in spite of normal GH responses. In conclusion, further studies will be required for the unkonwn causes of intrinsic shortness and dealyed growth and the measurement of somatomedin-C may be useful for the differential diagnosis of intrinsic shortness from the other categories.
김효종(Hyo Jong Kim),김배영(Bai Young Kim),김병호(Byung Ho Kim),이정일(Joung Il Lee),장영운(Young Woon Chang),장린(Rin Chang),이기형(Kee Hyung Lee),전정열(Jung Youl Chun) 대한내과학회 1991 대한내과학회지 Vol.40 No.2
Growth retardation and delayed sexual maturation occur in 15-30% of adolescents afflicted with Crohn`s disease and social complication of these immaturity are often more debilitating than the gastrointestinal manifestation. The etiology of this abnormal growth had been unknown, and various forms of therapy including surgery had yielded disappointing results. Recently, however, chronic caloric insufficiency has been documented in several reports and nutritional restitution using enteral and parenteral routes reverses growth retardation in these patients, and these nutritional effects on growth may be mediated by somatomedin-C. We recently experienced a case of Crohn`s colitis with growth retardation and delayed sexual maturation in adolescent who underwent surgical resection, so we couldn't confirm the nutritional effect on growth but the patient had no endocrine dysfunction and no history of corticosteroid therapy which had been incriminated as possible causes of growth retardation. We report a case of Crohn`s colitis with growth retardation.
활동기 궤양성 대장염에 있어서 과립구흡착요법의 전향적 다기관 연구
김효종 ( Hyo Jong Kim ),김주성 ( Joo Sung Kim ),한동수 ( Dong Soo Han ),양석균 ( Suk Kyun Yang ),함기백 ( Ki Baik Hahm ),이우인 ( Woo In Lee ),권석운 ( Seog Woon Kwon ),최재현 ( Jai Hyun Choi ),김원호 ( Won Ho Kim ),최규용 ( Kyu Y 대한소화기학회 2005 대한소화기학회지 Vol.45 No.1
Background/Aims: In chronic inflammatory conditions such as ulcerative colitis (UC), the migration of granulocytes and monocytes/macrophages from the circulation into the colonic mucosa is especially important in maintaining inflammation. The aim of this
Probe EF 5.44 를 이용한 가족성선종성용종증 ( FAP ) 과 Gardner 증후군 ( GS ) 가계의 Linkage Analysis
김효종(H . J . Kim),김영관(Y . K . Kim),동석호(S . H . Dong),김병호(B . H . Kim),이정일(J . I . Lee),장영운(Y . W . Chang),장린(R . Chang),최영길(Y . K . Choi),이기형(K . H . Lee) 대한내과학회 1993 대한내과학회지 Vol.45 No.3
Background: Familial adenomatous polyposis (FAP) and Gardner's syndrome (GS) are conditions, inherited in an autosomal dominant fashion, that predispose affected family members to the development of colorectal cancer. The gene(s) responsible for FAP/GS is on the chromosome 5q21-22. Several RFLP markers for the chromosome 5q21-22 region are now available and can be used clinically for premobid diagnosis in affected FAP/GS family members. Probe EF5.44 is an RFLP marker that is tightly linked (Lod Score>3.0) to the FAP/GS locus. Methods: In FAP family, 10 mL of peripheral blood was sampled from the index case, his parents, brother and sister, and his wife and children. In GS family, similiar amount of blood was sampled from the index case, his wife and children. DNA was purified and five micrograms of each DNA was digested with restriction enzyme Msp I, and Southern blotting and hybridization using the probe EF5.44 were performed. Results: Probe EF 5.44 yielded only one band of 2.0 Kb without RFLP in al1 FAP/GS family members of this studay. Conclusion: Probe EF5.44 was found to be uninformative in both FAP/GS family members of this study. These results reveal that linked DNA probe has several limitations due to it's inherent low heterozygosity and so new DNA markers, such as microsatellite VNTRs, are preferable for genetic linkage analysis.
Cheol-Seung Cheon,Chang-Lak Kim 한국방사성폐기물학회 2017 방사성폐기물학회지 Vol.15 No.4
2017년 6월에 영구정지 된 고리 1호기의 해체는 한국의 상업 원전에 대한 첫 해체 사례가 될 것이다. 해체 과정 중에 발생하 는 폐기물에 대한 처분은 전체 해체 비용의 많은 부분을 차지한다. 따라서 방사화 및 오염된 콘크리트 구조물은 적절한 해체 전략을 수립하여 경제적이고 안전하게 해체되어야 한다. 본 논문에서는 생물학적 차폐체에 대한 최적화된 해체 및 처분 시 나리오를 연구하였다. 해체사례, 폐기물 처분 규정 및 처리 기술을 분석하였다. 그리고 생물학적 차폐체 제거 과정의 폐기물 발생량을 최소화하기 위해서, 최적 해체 시나리오를 제시하였고 폐기물 처분 방안을 도출하였다. The decommissioning of Kori unit 1, which was permanently shut down in June of 2017, will be the first instance of the dismantling of a commercial nuclear power plant in Korea. The disposal of waste during the dismantling process accounts for a large part of the total decommissioning cost. Therefore, structures consisting of activated and contaminated concrete must be economically and safely dismantled by establishing a proper dismantling strategy. This study focuses on optimized dismantling and disposal scenarios pertaining to a biological shield. Several dismantling cases, regulations and technologies related to waste treatment as these practices pertain to nuclear power plants are analyzed. To minimize the amount of waste from the biological shield dismantling process, an optimized dismantling scenario is presented and disposal alternatives for dismantled concrete waste are proposed.
김효종(Hyo Jong Kim),김영수(Young Soo Kim),정현철(Hyoung Chul Jung),김병호(Byoung Ho Kim),이정일(Jung Il Lee),장영운(Young Woon Chang),장린(Rin Chang),민영일(Young Il Min) 대한내과학회 1987 대한내과학회지 Vol.33 No.2
N/A The pancreas is a notoriously difficult organ to evaluate for neoplasia despite the fact that the incidence of carcinoma of the pancreas is increasing and has a very poor prognosis. In recent years, ultrasonography has emerged as a safe, simple and the best tool as screening the diagnosis of the pancreas disorders including carcinoma. But explaratory surgery and biopsy remain the usual way to make a definite diagnosis whether the lesion is malignant or benign in all but advanced cases. The development of special ultrasound biopsy transducer that allows accurate placement of the biopsy needle has made sonoguided percutaneous aspiration biopsy, a simple procedure to perform. Authors performed above methods in 13 cases which had a reasonable clinical and sonographic suspicion of carcinoma of the pancrease. Of these, 10 cases (77%) had a definite cytologic diagnosis. There was no morbidity associated with the procedure in these patients. And authors could puncture the small pancreatic mass within 2 cm in size with simplicity, safety and accuracy. Consequently, we were conceived ultrasound guided percutaneous fine needle aspiration biopsy can be recognized as the most useful method for accurate diagnostic evaluation of the pancreatic mass.
적외선 열화상 기술의 최신 연구 동향과 발전 현황 (Recent Advancement and Development on Infrared thermography Technique)
김효종(Hyo-Jong Kim),김정국(Jeongguk Kim),김남포(Nam-po Kim) 한국철도학회 2011 한국철도학회 학술발표대회논문집 Vol.2011 No.5
All objects emit infrared above absolute temperature 0K. Infrared thermography is one of the nondestructive testing technologies to measure the temperature of the object. Infrared thermography shows infrared image which in a longer wavelength than visible light. Infrared technology can be employed regardless of the type or state of the objects. Thus, infrared thermography technique has been used in a wide variety of manufacturing processes in areas such as mechanical, electrical, chemical and medical applications. The advancement of using infrared technology has been increasing. In this paper, the principle of lock-in infrared thermography and its applications were investigated, and the direction of future development was discussed.