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.

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.-

혈액암환자에서 조혈모세포 이식 후 따르는 헤르페스 바이러스 감영 양상

이호섭,탁희상,신성훈,김양수,남성진,김혜수,박진희,정수현,김성빈,김예나 고신대학교 의과대학 2010 고신대학교 의과대학 학술지 Vol.25 No.1

배경 : 헤르페스바이러스과에는 단순포진 바이러스(HERPES SIMPLEX VIRUS, HSV), 수두대상포진 바이러스 (VARICELLA-ZOSTER VIRUS, VZV), 엡스타인-바 바이러스 (EPSTEIN-BARR VIRUS, EBV), 그리고 거대세포 바이러스 (CYTOMEGALOVIRUS, CMV) 등이 있다. 헤르페스바이러스 감염은 혈액암환자에서 조혈모세포 이식 환자에서 전파 (dissemination), 이차감염, 세균 중복 감염의 심각한 합병증을 일으킬 수 있다. 하지만 항암약물치료를 받는 림파종 환자에서 항 바이러스 약제의 사용 용량과 기간에 대한 concensus는 없다. 헤르페스바이러스 감염에 대한 발생율과 위험인자를 후향성으로 분석하였다. 방법 : 고신대학교 복음 병원에서 1995년 6월부터 2009 년 2월 사이에 새롭게 진단되어 조혈모세포 이식을 받은 전체 58명의 환자들이 후향적으로 현 연구에 등록했다. 헤르페스 바이러스 감염은 임상적 진단, 혈청학적 검사 또는 병리학적 진단에 기초하여 확진한다. 환자들의 특성은 다음과 같다: 평균 연령은 44세 (범위 19-62세)였고 남녀비는 30:28이었다. 등록된 질환은 백혈병 (n=9, 15.5%), 림프종 (n=30, 51.7%), 다발성 골수종 (n=12, 20.7%), 재생불량성 빈혈 (n=6, 10.3%) 그리고 골수이형성증후군 (n=1, 1.7%)이 포함되었다. 결과는 chi-squre test나 independent samples T test를 사용하여 분석되었다. Multivariate analysises에 대해 logistic regression test를 사용하였다. 결과 : 15명의 환자들 (25.9%)에서 조혈모세포 이식후 헤르페스 바이러스 감염이 발생하였다. 조혈모세포 이식 5년간 누적 발생율은 53.9%였다. Univariate analyses에서 헤르페스 바이러스 감염에 대한 유의한 위험 인자는 없었다. 하지만 조혈모세포 이식후 생존 기간(40.18 ± 30.14 months vs 20.06 ± 26.67 months, p=0.018)은 헤르페스 바이러스 감염의 낮은 발병율과 유의한 관련성이 있었다. 이식 편대 숙주질환 (GVHD)의 존재 (37.5% in developed GVHD vs 0% in no GVHD, p=0.200), 동종조혈 모세포 이식에서 면역억제요법의 기간 (15.98 ± 14.02 months vs 6.78 ± 3.67 months, p = 0.374)은 헤르페스 바이러스 감염에 대한 위험인자가 아니었다. 결론 : 조혈모세포 이식 후 생존 기간은 어사이클로비어 예방을 받은 혈액암 환자에서 헤르페스 바이러스 감염의 낮은 발병율과 연관성이 있는 것으로 보인다. 저용량의 어사이클로비어 예방은 헤르페스 바이러스 감염의 고위험군인 조혈모세포 이식을 받은 혈액암 환자에 필요하리라 생각된다. Background : Herpesviridae family includes herpes simplex virus, varicella zoster virus, Epstein-Barr virus, and cytomegalovirus, etc. Herpesviridae viral infection (HVI) can lead to serious complications including dissemination, secondary infection, bacterial superinfection in patients with hematologic malignancy following hematopoietic stem cell transplantation (HSCT). But there was no consensus on the dose and duration of antiviral agents prophylaxis in patients undergoing chemotherapy. We retrospectively analyzed the incidence and the risk factors for HVI. Method : A total of 58 patients who newly diagnosed and received HSCT with prophylaxis of acyclovir at the Kosin University Gospel Hospital, Busan, Korea between June 1995 and February 2009 were enrolled retrospectively in the current study. HVI was confirmed based on clinical diagnosis, serologic test or pathologic diagnosis. The characteristics of the patients were as follows: the median age was 44 years (range 19-62 years) with a female-to-male ratio of 30:28. The enrolled diseases included leukemia (n=9, 15.5%), lymphoma (n=30, 51.7%), multiple myeloma (n=12, 20.7%), aplastic anemia (n=6, 10.3%) and myelodysplastic syndrome (n=1, 1.7%). The results were analyzed using a chi-square test and independent samples T test. For the multivariate analysis, we used logistic regression test. Results : Fifteen patients (25.9%) developed HVI after HSCT. The cumulative incidence of HVI was 53.8% at 5 years after HSCT. In univariate analysis, there was no significant risk factor for HVI. The presence of graft-versus-host disease (GVHD) (37.5% in developed GVHD vs. 0% in no GVHD, p=0.200), duration of immunosuppressive therapy (IST) in allo-SCT (15.98 ± 14.02 months vs. 6.78 ± 3.67 months, p = 0.374) were not risk factors for HVI. Conclusion : The incidence of HVI was similar to that in historical other studies. There was no risk factor associated with development of HVI. Most of the HVI occurred within the first 24 months after transplantation. So long term use of antiviral prophylaxis may be needed to prevention of HVI after HSCT.

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.

한의진단명과 진단요건의 표준화 연구 III : 3차년도 연구결과 보고

최선미,양기상,최승훈,박경모,박종현,심범상,김성우,노석선,이인선,정진홍,이진용,김달래,임형호,김윤범,박성식,송태원,김종우,이승기,최윤정,신순식 한국한의학연구원 1997 한국한의학연구원논문집 Vol.3 No.1

The diagnostic requirements were suggested and explained regarding the systems of differentiation of symptoms and signs in the third year study of standardization and unification of the terms and conditions used for diagnosis in oriental medicine. The systems were as follows : - analyzing and differentiating of epidemic febrile disease - analyzing and differentiating in accordance with the Sasang constitution medicine based on four-type recognition - differentiation of disease according to pathological changes of Chong and Ren channels - standards for diagnosis of women's disease - standards for diagnosis of children's disease - standards for diagnosis of motor and sensor disturbance (-muscle. born, joint, etc.) - standards for diagnosis of neuropsychiatric disease - standards for diagnosis of five sense organ disease - standards for diagnosis of external disease The indivisual diagnosis pattern was arranged by the diagnostic requirements in the following order : another name, notion of diagnosis pattern, index of differentiation of symptoms and signs, the main point of diagnosis, analysis of diagnosis pattern, discrimination of diagnosis pattern, prognosis, a way of curing a disease, prescription, herbs in common use, disease appearing the diagnosis pattern, documents. The standards for diagnosis of each disease was arranged by the diagnostic requirements in the following order : another name, notion of disease, the main point of diagnosis, analyzing and differentiating of disease, analysis of disease, discrimination of disease, prognosis, a way of curing and prescription of disease, disease in western medicine appearing the disease in oriental medicine, documents.

健康權과 醫療制度에 관한 考察

金成勳 제주한라대학 1980 論文集 Vol.6 No.-

In this paper, we investigate the possibility and necessity to find a theory concerning the establishment of the right to health, and problems and situations of the medical care system to guarantee the right to health. Our purpose is to maintain and improve the nation's health by establishing the right to health and hence we strongly urge the government to establish the positive policy concerning the rational medical care system. The backgrounds of the right to health we claim come from the ecological and social economic approach. Moreover, the right to health and medical care system come from the legal approach. One's health status depends upon the social economic phenomena and the disease depends upon the social environment. Thus, the modern medical care is generally recognized as the comprehensive care : preventive, curative, and rehabilitative, Accordingly, maintaining the health of all people is responsible to the government and all people have a right to guarantee the best care anywhere and anytime with a lower fee for service. The medical care system must be a system which is available for all the people as easily as we want with the best treatment on the higher level of the medical care system. On the other band, since most of our medical care system seem to be the free enterprise nature organized by doctors' relation or individual private practitioners, both of them make use of health care by making money and hence one's life and health problem are available as an object of the commercial profit. Thus, our medical care system may be the worst in the world. Our country has poor health manpower, health facilities, and no public responsibilities. Also, each medical agency has no functional specializations and no cooperation among medical agencies. Moreover, these agencies are located in the city regions over 80%, and particularly, in rural and inner city or regions with no physicians we have a serious health problem, and also a serious policy concerning health problem, emergency care, special- disease, incurable disease of lower class living in the city regions. In the future, we supply sufficiently many doctors, coordinate private medical agencies suitably according to particular regions, extend public medical agencies, control both of private and public medical agencies, stop drug abuse, change the health care for the preventive care, establish the comprehensive community care system and emergency care system, vanish the regions with no physicians, cut down fee for service, stop the doctor's exclusive and monopolic care. Medical care must be socialized. To guarantee the right to health we must nationalize the medical care and make it the National Health Service.

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.

긴 관동맥병변에서 긴 스텐트삽입에 대한 임상경과 및 재협착율

김영학,박성욱,정상식,박훈기,이상곤,이일수,이철환,김재중,홍명기,박승정 대한순환기학회 1998 Korean Circulation Journal Vol.28 No.6

SESAME를 이용한 초고속 통신망에서의 안전한 원격 의료 서비스에 관한 연구

김수광,최용락,김성훈 大田大學校 産業技術硏究所 1997 산업기술연구소 論文集 Vol.8 No.1

Enforcing network security in telemedicine systems is necessary to ensure security of the information exchanged. This paper deals with the need for security in application programming based on the information superhighway. A secure network is critical for the survival and success of applications. In this paper we discuss some features of well-known security mechanisms such like Kerberos, NetSP, SPX and SESAME. We also propose a software design strategy of telemedicine systems using SESAME developed by ECMA.

Pyridylmethyl 기가 치환된 polyamine cage 착물의 합성과 특성

金洋,鄭聖勳,金日出 고신대학교 자연과학연구소 1997 고신대학교 자연과학연구소 논문집 Vol.7 No.-

이중고리 착물인 diaminosarcophaginecobalt(Ⅲ)과 aminomethylsarcophaginecobalt(Ⅲ)의 다양한 pyridylmethyl 기 유도체를 합성하고 특성을 조사하기 위하여 알킬화제로써 2- 및 4-pyridylaldehyde를 이용한 알킬화 반응이 적용되었다. 얻어진 유도체는 mono- 및 dipyridylmethyl 기가 치환된 혼합물로써 높은 수득률로 얻어졌다. 생성물에 대한 X-선 결정학, uv/visible 분광학, 원편광이색성 분광학, nmr 분광학의 특성을 조사하였다. Cage 착물의 일차 amine의 알킬화는 착물의 배위특성에 거의 영향을 주지 않는 것으로 나타났다. 착물의 리간드장도 또한 cage의 1 및 8 위치에서의 알킬화에 의하여 거의 영향을 받지 않는 것으로 나타났다. Cage 착물의 광학활성은 imine 기의 환원이 진행되는 동안에도 유지되었다. 고체상태에서 pyridyl 치환기는 π-π 상호 작용에 의하여 겹쳐져 있었다. Uv/vis 스펙트럼과 X-선 결정구조의 조사에 의하여 cobalt(Ⅲ) 이온 주위의 ethylenediamine 고리가 lel₃ 비치를 가지는 것으로 알려졌다. Alkylation reaction involving 2- and 4-pyridylaldehyde as alkylating reagents was adopted to synthesise and characteries several pyridylmethylated derivatives of the bicyclic complexes, "diaminosarcophagine-cobalt(Ⅲ) " and "aminomethylsarcophaginecobalt(Ⅲ)". The obtained derivatives were found to be the mixture of mono- and dipyridylmethylated complexes in high yield. The products were characterised by X-ray crystallography, uv/visible spectroscopy, circular dichroism spectroscopy, nmr specrtometry. The alkylation of the primary amines of cage complex appeared to have little effect on the coordination characteristics of the complex. The ligand field of the complexes also appeared to be little affected by the alkylation on the 1 and 8 positions of cage. The optical activity of cage complexes was retained during the reduction of imine groups proceeded. In the solid state, pyridyl substituents were stacked due to π -π interaction. By investigating uv/vis spectrum and X-ray crystal structure, it was found that ethylenediamine rings around cobalt(Ⅲ) ion had lel₃ conformation.