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.

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.

평판구조물의 동적해석을 위한 유한요소의 개선

김선훈,유승운 永同大學校 1999 硏究論叢 Vol.5 No.1

본 논문에서는 평판구조물의 동적해석에서 우수한 결과를 보여주는 개선된 유한요소를 제시하였다. 이 요소는 Mindlin평판이론에 의하여 수식화되었으며, Heterosis평판요소의 변위장에 2개의 비적합변위형을 추가함으로서 유도되었다. 본 논문에서 제시한 평판유한요소는 다른 요소들에 비해 신속한 수렴성을 보였으며, 아주 얇은 평 판문제에서도 요소의 형상에 관계없이 전단구속현상을 극복하였다. 또한 이 요소는 평판구조물의 동적해석에서도 신뢰할 만한 결과를 보여줌을 알 수 있었다. An improved finite element for dynamic analysis of plate structures is suggested in this paper. This element is based upon Mindlin plate concept. The displacement field of this element is also formulated by adding two non-conforming modes to rotational displacement components of a heterosis plate element. It is shown that the results obtained by the proposed element converged to analytical solutions very rapidly through numerical studies for various benchmark problems, and overcome the shear locking problem completely in very thin plate situation even for distorted meshes. It is also noted that the element is applicable to the dynamic analysis of plate structures.

생물전극 반응조를 이용한 영양물질 제거

김성완,윤철종,최성우,김성우,우성훈,신남철,박승조 동아대학교 환경문제연구소 1999 硏究報告 Vol.22 No.2

We have investigated a performance of bio-electrode reactor for removal of nutrient like a nitrogen, phosphorus and organic substrate. Lab scale of bio-electrode reactor was operated with synthetic and tannery wastewater. Iron bar and stainless steel used for anode and cathode respectively. In experiment with synthetic wastewater, we were able to obtain the optimal current density range of 2.4-40 mA/dm² after 48 hrs operating time. And in that experiment, about 70~73% of ammonia nitrogen and 54~64% of phosphorus were removed. In experiment with tannery wastewater at 2.4-4.0 mA/dm², the removal rate of ammonia nitrogen, phosphorus and organic substract were about 62-69%, 45~59% and beyond 79% respectively.

消渴屬腎에 關한 文獻的 考察

金聖勳,郭桂豪 大田大學校 1991 論文集 Vol.10 No.1

신장의 미세혈관병증을 동반한 원발성 항인지질 증후군 1 예

김미경,고은미,김진석,차훈석,허우성,고재현,이충현 대한내과학회 2001 대한내과학회지 Vol.61 No.1

Antiphospholipid syndrome is a disease that has continuous high titer of antibodies directed against either phospholipids or plasma proteins bound to anionic phospholipids in serum and shows a variety of clinical manifestations including recurrent venous and arterial thrombosis, recurrent fetal losses, livedo reticularis and thrombocytopenia. Because thrombosis may develop in any vessel, clinical manifestations are variable. Renal microangiopathy has been reported in antiphospholipid syndrome associated with systemic lupus erythematosus and rarely reported in primary antiophospholipid syndrome. But there was no case report of antiphospholipid syndrome accompanied by renal microangiopathy in Korea. Recently, we experienced a 25 years old male patient who had primary antiphospholipid syndrome with intrarenal thrombotic microangiopathy and IgA nephropathy. So, we report this case with review of relevant literature. (Korean J Med fil:86-90, 2001)

醫藥品의 安定性에 關한 硏究 (第3報) : Sulpyrin 水溶液의 安定性에 關하여 The Stability of Sulpyrin in Aqueous Solution

金鍾秀,金壽億,徐成勳 慶熙大學校 1983 論文集 Vol.12 No.-

The pharmacokinetic study of solution was conducted to determine the stability of sulpyrin. The powder was added with diluents and stored under three different conditions to determine the humiditification weight and degradation rate. The solution of sulpyrin indicated first order reaction and t_90 was 82 days at 25℃. When the powder was stored under the three different conditions, the avicel mixture showed the highest humiditification weight, while the only sulpyrin showed the highest degradation rate under the relative humidity of 75% and 92% followed by the avicel mixture. The starch and lactose mixture showed the lowest similar humiditification weight and degradation rate. Therefore, it seems that the stability of the main ingredient will be greatly influenced by the diluents.

環境權의 展開와 確立

金成勳 제주한라대학 1980 論文集 Vol.6 No.-

This article attemps to make a legal approach to inquire into some environmental problems from the viewpoint of the establishment of environmental right. Therefore, this article aims to establish the right by examining the background, development and the theory of environmental law. The effects of environmental right limit their range to those of legislation and administration. As the aspect of today's environmental pollution or devastation is complicated and diversified, the environmental problems are becoming more serious and have outgrown the function of the conventional civil law principle. This is why the conventional law principle has to be corrected and give rise to the need of environmental right. This right will make possible the pleasant environment and a healthy life in it. This is an inborn, individual right as the fundamental human right. This right to protect the environment from devatation and pollution rests on the ideology of the superiority of human being over economy and on the absoluteness of the protection of the human being's health. Therefore, this environmental right can be said to be the one to make possible a lawsuit only with the regulations of Constitution. The approval of the environmental right works as a guiding doctrine for the preservation of a healthy and delightful environment in the aspect of the effects of legislative policy of environmental pollution. As a result of the comprehension of law principle, this approval of environmental right offers some ground for the obligatory suit in the administrative litigation, and for the request of the compensation for damage resulted from the violation of the environmental right. But, in fact, the legistative or administrative power is no longer able to cope with the environmental problems, neither helpful is the juridical relief to their solution owing to its restrictions. Thus the future of the environmental right has no other choice but to be development positively on the legislative or administrative measure inclusively considering the preservation and recovery of environment the welfare and health of the individual resident. So far as the juridical relief is concerned, ahead lies the task to construct the new legal technique for the preseration and recovery of environment.

영동공과대학교의 웹 서버 개발

김성훈,박충식 永同工科大學校 1996 硏究論叢 Vol.2 No.1

본 연구의 목적은 본교의 STC과정의 일환으로 교수와 학생의 공동 참여에 의해 영동공과대학교의 웹서버를 직접 개발하는 것이다. 이 과정을 통하여 학생들이 인터넷 관련 최신 기술을 습득/이해할 수 있었고, 개발된 웹 서버는 대외적으로 본교를 홍보하는데 매우 중요한 역할을 할 것으로 기대된다. 뿐만 아니라, 웹 서버를 통하여 교과 과정에 관련된 다양한 정보를 학생들에게 제공하게 될 것이며, 학생들의 질문 및 답변도 웹으로 이용함으로써 교육적인 효과를 더욱 증대시킬 것으로 예상된다. The purpose of this study is that professors and students co-involve to develop the YIT's web server by one of STC(Special Topic Courses) programs. Through this developing program, students have learned the most updated technologies related to the internet WWW, and the developed YIT web server will be an important role to introduce our school outside. We expect a lot of educational effects for providing valuable information of educational programs and Q&A(questions and answers) services by the YIT's web server.

醫療過誤의 刑事責任

金成勳 제주한라대학 1976 論文集 Vol.2 No.-

1. The doctor's act of medical treatment is an important business dealing with human life and the doctor should treat patients with his professional medical knowledge, experience and the well-eqipped medical facilities. However, it is unreasonable that he should be legally responsible for the faults in his medical treatment, based upon only the results, with nothing of the proccess considered at all. There have been truly the various kinds of unfortunate results unexpected in the treatment process, not withstanding his professional experience and ability because the organization of the human body differs from the mechanism of things. Therefore it is desirable that he should be legally guarenteed in performing the medical act with relief and conviction. 2. Malpractice means bad, wrong, or injudicious treatment of a patient, Professionally and in respect to the particular disease or injury, resulting in injury, unnecessary suffering, or death to patient, and poceeding from ignorance, carelessness, want of proper professional skill, disregard of established rules or principles, neglect, or a malicious or criminal intent. 3. Though the criterion for decision of the negligence in the medical accident can not be uniformly regulated, the generally accepted one ought to depend on the facilities and the skill normal to the average reffered to the regional difference and emergency. 4. There seem to be many types in differentiating the malpractice. At first, from the view point of the difficulty of recognition of the negligence, there are two types. One is the comparatively simple technical treatmenton which there are likely to be very few disputes-errors from shots, medicines and the aftermath of operations. The other is the one from the medical misjudgement-an erroneous diagnoses. In this point, many problems in recognizing varied medical errors are deliberately illustrated here. Some problems caused from handling the unusual constitution and from taking care of patients unfaithfully are also stated here. 5. As the number of the cases of procedure on the medical negligencs has increased in recent years, the legitimacy of medical behaviors which has been neglected for the time being seems to attract attention from the various fields of jurisprudence and medicine, encouraged by the progress in their remarkable studies. Even though the medical skill have remarkably developed, there have been always the possibilities that the unexpected misfortunes from medical negligence may happen at any time. And it cannot be emphasized too strongly that the proper and reasonable harmonious points should be established to proceed legal settlement between the security of human right the patients' sake and the legal guarentee for the medicine men in cases of negligence. Thus it is strongly requested that a tentative study and many other precedents on both sides from the related fields should be made for the legitimacy of medical doctors' act for the protection the patients' human rights from malpractice.