Prediction of Retained Austenite Fraction in Quenching-and-Partitioning (Q&P) Steels Using the Gibbs Energy Balance Approach

Seong Hoon Kim,Ji Hoon Kim,Jae Hoon Lee,Dong‑Woo Suh,Jae Sang Lee 대한금속·재료학회 2022 METALS AND MATERIALS International Vol.28 No.9

Prediction of retained austenite fraction is quite important in designing advanced high strength steels since retained austeniteis the source of transformation-induced plasticity. The present study investigates the phase constitution of a medium-carbonQ&P steel by comparing various approaches to the transformation stasis of bainitic ferrite and applying them to the partitioningprocess. Among them, the modified GEB approach gave the best agreement with the experimental observation, includingthe effects of heat-treatment condition and chemical composition on phase constitution. This indicates phase transformationduring partitioning can be effectively described by the physics of Gibbs energy balance approach.

류마티스성 승모판 협착증의 치료를 위한 경피적 승모판 성형술의 치료성적

김성은,조흥근,박성훈,박시훈 梨花女子大學校 醫科大學 醫科學硏究所 1999 EMJ (Ewha medical journal) Vol.22 No.4

연구목적 : 류마티스성 승모판 협착증에 대한 유용한 치료법인 경피적 승모판 성형술의 본원의 단기 치료 성적을 알아보고자 하였다. 방법: 1993년 10월에서 1999년 4월까지의 이대목동병원에 내원한 류마티스성 승모판 협착증 환자 21명에서 투시조명 하에 경피적 승모판 성형술을 시행하였다. 시술전에 경흥부심초음파와 경식도초음파가 시행되었고, 시술후에는 경흉부초음파를 사용하여 혈역학적, 임상학적 변화를 비교하였다. 연구대상의 거의 모두가 NYHA class Ⅱ에 속했고, 5명이 심방세동을 가지고 있었으며, 모두 심초음파점수가 8이하였다. 좌심방에 혈전이 있는 경우로 혈전을 용해시킨 후 시술한 경우가 2예였다. 결과 : 경피적 승모판 성형술 이후의 평균 승모판구면적은 시술전의 1.16±0.36㎠에서 2.06±0.33㎠로 증가되었다. 경승모판 이완기 평균 압력차는 시술전 11.60±5.54mmHg에서 시술 후 4.93±2.53mmHg(p<0.001). 좌심방 크기는 46.41±14.66mm에서 42.03±15.01mm로(p=0.042), 그리고 심박출량은 4.21±1.25L/min에서 6.88±9.57L/min로(p<0.0001) 의미있는 호전을 보였다. 3도 이상의 심한 승모관폐쇄부전이나 심각한 시술후 합병증은 없었다. 결론 : 본원에서 약 6년간 시행된 경피적 승모판 성형술는 그 사례가 적고 시술전 예상되는 난이도 면에서 특이한 것은 없었지만, 시술후 합병증이 거의 발견되지 않았으며 혈역학적 측정상에서도 성공적인 시술을 보여주었다. 승모판구면적에 따른 시술후 단기내 호전의 정도는 거의 예측할 수 없었으나, 심초음파점수는 모두가 8점이하로 높은 성공율의 조건을 제공하였다. Objective : Percutaneous mitral valvuloplasty(PMV) became a treatment modality or mitral stenosis because of its low morbidity, short hospital stay, and low cost. We reviewed clinical and hemodynamic results after PMV for the patients with mitral stenosis in Ewha Womans University Mokdong hospital. Methods : We compared the results of echocardiographic, hemodynamic, and clinical parameters before and after PMV. PMV was performed under fluoroscopic guidance in 21 patients(M:4, F:17, mean age 43±12 years) with mitral stenosis from October 1993 to April 1999. Transesophageal echocardiography(TEE) and Transthoracic echocardiography(TTE) were performed for the evaluation of mitral valve, chamber size, and the presence of left atrial thrombus before procedures. TIE was also used for follow-up evaluation. On presentation, all patients showed at least NYHA class Ⅱ. Five patients had atrial fibrillation. Two patients with thrombus in the left atrium were included to study group after thrombolytic treatment with coumadin. Echo-score of our patients was not greater than 8. Results : Mean mitral valve area(MVA) by 2 dimensional or Doppler echocardiography was increased from 1.16±0.36㎠ before PMV to 2.06±0.33㎠ after PMV. There were marked improvements in transmitral gradients(11.60±5.54mmHg before PMV vs 4.93±2.53mmHg after PMV, p<0.001), left atrial dimension(46.41±14.66mm vs 42.03±15.01mm, p=0.042), and cardiac output(4.21±1.25L/min vs 6.88±9.57L/min, p<0.0001) following PMV, Severe(≥GⅢ) mitral insufficiency or severe postprocedural complications were not noted. This suggested that all procedure was successful. Conclusion : The Procedural success rate of PMV in Ewha Womans University Mokdong hospital was 100%. Low echo score of our patients might explain this high procedural success rate. Long-term-follow-up is warranted in the near future.

韓國人의 各 臟器組織中 靑酸鹽의 微量分布에 關한 硏究(Ⅱ)

張成吉,金恩浩,金英雲,李鎭勳,柳在薰,權五星,金明德,吳世珍,金由那 內務部 國立科學搜査硏究所 2001 國立 科學 搜査 硏究所 年報 Vol.33 No.-

격투스포츠 선수의 스포츠맨십 분석

박태훈(Park Tae-Hoon),유기성(Yoo Ki-Seong),유원용(Ryu Won-Yong),김영욱(Kim Young-Wook),이양구(Lee Yang-Gu),공창빈(Kong Chang-Bin),이상호(Lee Sang-Ho),김태영(Kim Tae-Young) 한국체육과학회 2010 한국체육과학회지 Vol.19 No.3

This research examines whether difference that is some in inclination of combat sports player's sportsmanship is, and accordingly is purposeful to clear relation. combat sports (fencing, Taekwondo, boxing, induction, wrestling, wrestling) player who research target is having player life in middle·high·an university 399 people be . Used Korean-made measure (KMSOS) that Seong-changhun (2003) verifies changing based on Vallerand MSOS by a tool to measure sportsmanship of players. Data processing used SPSS 12.0 programs. Did reliability analysis that use Cronbach'a coefficient to verify believability of an irradiation tool, Difference of sportsmanship used t-test, one-way ANOVA. In this research, drew following conclusion. First, man appeared higher level than woman in wave and human desire, decision respect, and woman appeared higher level than man in victory or defeat excessive fondness. Second, exercise immersion, decision respect, victory or defeat excessive fondness appeared level that minority is taller than majority. Third, in exercise immersion high school player decision respect appear, and tendency of level that middle school playing the first stone is high in victory or defeat excessive fondness appeared. Fourth, striking radical type of player appeared higher level than Geuraepeulring type of player in companion respect factor. Fifth, player less than exercise career 4 years appeared higher level than player less than 7 years and player more than 7 years for victory or defeat excessive fondness factor. Sixth, Taekwondo for best and companion respect factor, high level appeared to boxing item players.

컴퓨터 법에 있어서의 책임에 관한 연구

鄭鎭世,鄭在晃,方碩皓,河泰勳,李成德,崔鳳哲 홍익대학교 1995 弘大論叢 Vol.27 No.-

This paper, coauthored by Chin-Se Chung, as well as other 5 faculty members at Hong-Ik University Department of Law (Jea-Hwang Jeong, Suk-Ho Bang, Tae-Hoon Ha, Seong-Deog Yi and Bong-Chul Choi), deals with liability issuses surrounding constitutional law, administrative law, civil law (contracts, torts), commercial law, criminal law, international law and philosophy & law. Professor of Law Jea-Hwang Jeong makes a comparative analysis of privacy protection and disclosure of information legal issues, appeared at current Korean law and draft of law in case of the latter one. He suggestes some desirable ways of legislation through revision process and operation of legal rules at his paper. Professor of Law Suk-Ho Bang makes a brief survey of civil liability issues arising out of contracts and torts in English and American law, first. He tries to show that many Parts of arguments in such legal world are attributed to Statute of Frauds tradition, unique to such legal world. New developments in the area of torts, including computer malpractice and computer virus, are shown and analysed in terms of application possibility under our current law. But, as even the Anglo-American courts are found very reluctant to accept those arguments as new grounds for torts liability, it seems more plausible and practicable to refer to contractual approach, basically, rather than to torts approach even under English American law. Professor of Law Chin-Se Chung suggests in his paper on EFT that the allocation of liability under EFT be made under the new and most relevant principle, working for useful transmission way of fund, not solely under traditional legal principles. If such new principle works with high return of risk to users, it makes imminent problems against the goats of consumer protection, and eventually will be hardly refered to. Conversely, if it requires too much sacrifice from the side of banks, then the convenience in such system will not be utilized. So, it may be natural that EFT be discarded even without proper functioning under market system. In conclusion, Professor Chung points out that, only when banks fond that the economy out of cost-saving at tasks outweighs the risk undertaken by the banks, the banks will operate the system. But, if this system makes more return of benefits to the banks with the burden of users, it is against the idea of equity. Consequently, the banks should bear the aggeviated risks in return for the cost saved under this system Professor of Law Tae-Hoon Ha focuses his research paper on criminal liability under EFT. He draws his conclusion out of current criminal statutes that illegal fund transfer under automatic teller machines, cash cards and information system can not be penalized due to lack of proper statutory provision. So, the criminal provision on computer crime, newly made on December of 1995, can be positively appreciated. But, he anticipates that the question whether such new provision will be successful in regulating all illegal activites at fund transfor system without any operation defects in criminal code, or will cause new problem in interpretation of criminal code remains unsolved. Professor of Law Seong-Deog Yi examines the international legal issues which may be given rise to by direct satellite broadcasting. In his paper, the issue of national jurisdiction in relation to direct satellite broadcasting is firstly dealt with. Secondly, the possible ways in which direct satellite broadcasting is regulated by international law are examined with special emphasis of two different approaches, that is, freedom of information approach and state sovereignty approach. In this context, many international conventions concerning direct satellite broadcasting in Particular, and international regulatory regime of outer space in general are broadly reviewed. Thirdly, the types of activities which may be a violation of international legal regime of direct satellite broadcasting are suggested and the possible lethal remedies for these violations are proposed with the traditional international state responsibility law in mind. Professor of Law Bong-Chul Choi explores the relations of computerized society to its laws throughout his paper as a kind of conclusion of this whole paper. Computerized society is one that the technical, scientific, informational knowledge prevails. With correspondence to the structural change in knowledge, the law of such a society has suffered transformation, and the knowledge and techniques distributing and computing legal responsibility has also changed. However, he does not insist that the diffusion of technical knowledge is the sole factor of the transformation of legal responsibility. It is only one of the various factors. Moreover, he does not deny the continuation between the classical techniques distributing legal responsibility and the contemporary ones. In this era, the law realizes fairness and community values at the expense of singularities. In addition, he proposes that legal scholars take the diagnosis of law from the perspective of the technology/knowledge shifts seriously.

농흉 연관 흉막 T 세포 림프종 1예

신성훈 고신대학교의과대학 2008 고신대학교 의과대학 학술지 Vol.23 No.3

농흉 연관성 림프종(pyothorax-associated lymphoma)은 일반적으로 B 세포성 림프종이 대부분을 차지하며 T세포 림프종의 발생은 극히 드문 것으로 알려져 있다. 조기진단과 종양의 수술적 완전 절제 가능 여부가 예후에 중요하다. 방사선 치료의 좋은 성적을 보고한 소규모의 후향적 조사들이 있으나 명확한 표준 치료를 제시하기는 힘든 실정이다. 저자는 흉막에 발생한 농흉 연관성 T 세포 림프종 1예를 경험하였기에 참고 문헌 검토와 함께 증례 보고하는 바이다. The author report a case of primary malignant T cell lymphoma arising from the pleura. The patient suffered from pulmonary tuberculosis 20 years ago but he was sucessfully cured after 12 months-antituberculosis therapy. He was admitted with dyspnea on exertion. Chest CT demonstrated a mass along the right chest wall. PCNB (Percutaneous Transthoracic Biopsy) of the pleural tumor and bone marrow biopsy were performed. Results of immunohistochemical analysis were CD2(+), CD5(+), CD7(+), CD20(-), CD45RO(+) and HLA-DR(-). The author diagnosed this case as a peripheral T-cell lymphoma. The patient was progressively deteriorated and he died of sepsis 2 months after the completion of 2nd cycle CHOP (cyclophosphamide, doxorubicin, vincristine, and prednisone) chemotherapy

하악골 골절에 대한 임상통계학적 연구

이성훈,김기영,조규승,소광섭,박홍주,조요기,오희균,유선열 大韓顎顔面成形再建外科學會 1998 Maxillofacial Plastic Reconstructive Surgery Vol.20 No.1

만성 골수성 백혈병의 뇌수막 괴립구육종 1예

신성훈 고신대학교의과대학 2008 고신대학교 의과대학 학술지 Vol.23 No.3

과립구 육종은 골수성 백혈병 세포의 국소적 증식으로 야기되는 골수 외 고형 종양으로 정의된다. 이 중 만성 골수성 백혈병 환자에서 발생하는 뇌수막 과립구육종은 극히 드문 것으로 알려져 있다. 몇몇 증례에서 수술이나 방사선 치료로 호전된 사례를 보고하고 있기는 하나 전반적인 예후가 극도로 나빠 대개 수개월 안에 사망한다. 글리벡 치료 도중 발생한 골수 외 과립구 육종 증례를 경험하였기에 보고한다. 만성 골수성 백혈병 글리벡 치료과정 중 발생한 과립구육종은 나쁜 예후를 시사하며 혈액학적 관해가 유지되고 있다 하더라도 발생 가능함을 경험하였다. 그리고 발생 부위가 생명 증후와 직접 연관되는 연수, 뇌간 인근일 경우 병의 진행으로 또는 방사선치료의 추가적인 부종으로 생명이 위험할 수 있으므로 조기 수술적 뇌압 감압술 시행 후 추가적인 방사선 치료와 항암치료를 시행할 것을 고려해야 한다. Granulocytic sarcoma is an extramedullary solid tumor which results from the localized proliferation of myelogenous leukemic cells. Leptomeningeal involvement of granulocytic sarcoma is very rare in chronic myelogenous leukemia (CML). Some patients improve after surgery and radiotherapy but the prognosis is so poor that most patients die within months. The author experienced a case of chronic myelogenous leukemia associated with a leptomeningeal granulocytic sarcoma. The patient was a 27 year-old female and she was admitted with acute visual disturbance. She was diagnosed as extramedullary progressive disease of CML 1 year after Imatinib therapy. Therefore, the author report this case with literature review.

Clopidogrel 복용 중 발생한 혈전성 혈소판 감소성 자반증 1예

신성훈 고신대학교의과대학 2008 고신대학교 의과대학 학술지 Vol.23 No.3

Clopidogrel은 드물지만 혈전성 혈소판 감소성 자반증(TTP)를 유발할 수 있는 것으로 알려져 있다.1,2,4,6) 미국내 TTP의 발생 빈도는 매년 백만명 당 3.7명 정도로 보고되고 있고 경피적 관상동맥 중재술 시행 환자 중에는 0.02–0.06%에서 발생하는 것으로 보고되고 있다.1,2,4,6) 저자는 뇌혈관 폐쇄 질환으로 clopidogel을 복용해 오던 환자에서 미세 혈관병 용혈 빈혈 (microangiopathic hemolytic anemia) 급성 신부전, 혈소판 감소에 의한 출혈소견, 의식 장애 발생하여 혈전성 혈소판 감소성 자반증(TTP)으로 진단하고 혈장 교환술, 면역글로불린 치료 시행 후 호전된 증례 1예를 경험하였기에 보고한다. 호전 이후 다른 종류의 항 혈소판제 사용하였으나 특별한 부작용 관찰되지 않았다. thienopyridine에 의해 야기되는 TTP의 경우 약제별(ticlopidine, clopidogrel)로 발생 기전이 다른 것으로 보고되고 있어 반드시 thienopyridine계의 사용이 불가피한 경우는 다른 종류의 약제로의 변경도 고려해 볼 수 있으리라 생각된다.1,2,4,6) Thrombotic thrombocytopenic purpura (TTP) is an extremely rare and life-threatening condition, which is characterized by microangiopathic hemolytic anemia, acute renal failure, fever and changes in mental status. Pregnancy, toxins, malignancy, antineoplastic agents and thienopyridines (clopidogrel and ticlopidine) are known to precipitate it. Clopidogrel, a widely used antiplatelet agent, has been rarely reported to cause TTP. We report a case of clopidogrel-induced TTP. An 81 year old male patient suffered an acute ischemic stroke. Clopidogrel (75mg) was started daily and the platelet count was normal on the 2nd and the 22th day of its administration. On the 45th day, he showed thrombocytopenic purpura and stuporous mentality. Under the diagnosis of TTP, a plasma exchange was performed and his condition eventually returned to normal platelet count and normal mental status.

디지털 콘텐츠 산업의 공간분포 특성에 관한 연구

김성훈,임용민,이시형,홍일영 남서울대학교 2010 남서울대학교 논문집 Vol.16 No.1-1

Digital contents industry is a developing industry which is being recognized for its growth possibility. This study is intended to understand the spacial distribution of digital contents industry. To do so, spatial range of this study is set in metropolitan regions to grasp the clustered regions. To understand the clustered regions of digital contents industry, spatial cluster analysis was enforced. As a result, total of 7 clusters were formed. 7 clusters are all located in Seoul, and 4 out of 7 are concentrated in Kangnam Gu. This study grasped the characteristics of these clusters. Locational factors of each company categories, which are the cause of such characteristic, are scheduled to be researched more specifically in the future. Key Words : digital contents industry, Spatial distribution, cluster, Locational factor, Spatial clustering