Effect of Impact Velocity on Interface Characteristics of HT‑9 Steel Joints Fabricated by Magnetic Pulse Welding

Jun‑Woo Song,Jin‑Ju Park,Gyoung‑Ja Lee,Min‑Ku Lee,Kyu‑Hyun Park,Soon‑Jik Hong,Jung Gu Lee 대한금속·재료학회 2020 METALS AND MATERIALS International Vol.26 No.3

The weldability window in magnetic pulse welding (MPW) is proposed for the end-closure joining of HT-9 steel tubularworkpieces. Based on both theoretical and experimental investigations, the impact velocity of the flyer tube at the momentof collision had a dominant effect on the bonding characteristics of the resultant joints and the optimal impact velocity wasestimated to be in the range of 265–290 m/s in this alloy system. Under the optimal process conditions, no leak was detectedduring helium leak testing. Moreover, the integrity of the joint interface was preserved until the tube section ruptured duringinternal pressure burst testing. For HT-9 steel, the ductile δ-ferrite phase produced by the localized interfacial melting duringMPW acted as an effective obstacle to crack propagation, thereby enhancing the fracture resistance of the joint interface. Allof the results demonstrated the high integrity and durability of the HT-9 steel tube assembly fabricated by the MPW process.

Water-soluble Genistin Glycoside Isoflavones Upregulate Antioxidant Metallothionein Expression and Scavenge Free Radicals

Chung, Mi-Ja,Kang, Ah-Young,Jun, Hee-Jin,Kim Sang-Yeon,Moon, Tae-Hwa,Park, Kwan-Hwa,Lee, Sung-Joon 생명자원연구 2005 생명자원연구 Vol.13 No.-

화자 식별과 얼굴 인식을 이용한 대규모 보안 시스템

홍승준,구자윤,권영헌,이건상 한양대학교 이학기술연구소 2000 이학기술연구지 Vol.2 No.

본 논문에서는 화자 식별과 얼굴 인식을 이용하여 대규모 보안 시스템을 개발하였다. 인식 에러를 줄이기 위해 전 처리 화자 식별기로 DHMM(Discrete hidden Markov Model)을 사용하였고, 후 처리기에서는 얼굴 인식을 위해 신경망을 사용하였다. Visual C++MFC을 사용하여 Sound Card와 Digital camera를 제어하였다. 그리고 본 논문에서 개발한 프로그램을 사용하여 실시간으로 실험하였다. 본 논문에서 인식에 사용한 특징 벡터로는 Filter bank energy, LSF와 Cepstrum coeffient이고, 얼굴 인식의 대표 벡터는 2차원 Filter bank energy를 사용하였다. 실험에서 사용된 사람은 학교에서 무작위로 83명을 선택하였다. Test를 위해 2049개의 음성 데이터와 365개의 얼굴 이미지를 사용하였다. 복합 모델로 구성한 본 시스템은 등록화자에 대해 98.8%의 Access rate와 비 등록화자의 99.82%의 deny rate을 나타내었다. In this paper, we developed the large scale security system using speaker identification and face recognition. In order to reduce the recognition error we used DHMM(Discrete Hidden Markov Model) in speaker identification for pre-processor and neural network in face recognition for post-processor. To test the on-line performance of total system we directly controlled the sound card and the digital camera in the environment of Visual C++MFC. And we developed the program to test the performance of the system in real time. We used filter bank energies, LSF and cepstrum coefficients as the feature vectors of speech, and the 2-dimensional filter bank energies extracted in the range of the representative feature on face. In experiments, we randomly selected 83 persons in school, and then chosen 10 persons as an enrolled person and 73 persons as a non-enrolled person. So we tested 2049 speech data and 365 image data. It turned out that the hybrid system would have 98.8% access rates for the enrolled persons and 99.82% deny rates for the non-enrolled persons.

노인을 위한 주거환경조성의 이론 및 방법론적 연구

박전자 淑明女子大學校 1993 論文集 Vol.33 No.-

Today, the elderly population of our country has the rapid increase. Today there are 207.400 People aged 65 or over, and the figure will continue to rise until the year 1990. At that time this age group will constitute 3.7percent of the total population. Although the elderly population will level off then, the proportion of people aged 65 and over will continue to grow. Between 1985 and 2010 this age group is expected to increase by 8.3 percent In these studies on the Subject, emphasize that to be effective considering environmental-human behavioral relations, and andlyzing aspects of the aging process that affect design, general issues and concerns. Spacial organization schemes, and proposing an environmental setting which will inspire the satisfaction of the elderly. To try and define the needs of the elderly people is lik defining the needs of the human race. Many families find it difficult to provide adequate housing for themselves. In many cases older people prefer not to like with their own children. The decision to live alone is facilitated by increased home-health medical care and improved social services are strongly needed. As a result, a considering the characteristics of the elderly environmental factors, and various environmental design criteria for the elderly housing and general residential environmental design standards are suggested. Planning for the future is an important factor in designing for the elderly.

동화를 이용한 웹 구성 활동이 유아의 어휘력에 미치는 효과

곽준식,김순자,정정란 진주산업대학교 2002 論文集 Vol.41 No.-

The purpose of this study was to investigate the effect of fairy tale using webbing activation on reading vocabulary capacity of Young Children. The pretest-posttest control group design was used for this research. In the experimental group, webbing activation on contents after reading fairy tale was applied while comparison group followed ordinary class schedule without webbing activation. The subject were 60 of five years old children(31 boys, 29 girls) sampled form two kindergarten in J city located in the southern part of Korea. A total of 10 fairy tale listening sessions were executed. Before and after this program, pretest scores and posttest ones were obtained using vocabulary test. ANCOVA's using pretest as a covariance were applied for the statistical analyses. The results from the analyses were as follows: The children of experimental group using webbing activation showed higher scores in vocabulary test than the control group.

J. Dewey의 예술교육론

곽준식,김순자 진주산업대학교 1996 論文集 Vol.35 No.-

The purpose of this thesis is to analyze Dewey's theory of art and aesthetic experience and the philosophical foundation of aesthetic education. It is an inquiry into Dewey's philosophy of empirical naturalism and the place of art thereof, his conception of art as "an experience", and its implications for aesthetic education. Dewey explaing "an experience" in terms of the "immediate quality" and the "consummatory phase". Man is able to appreciate the immediate quality of an object or an event and to enjoy "an experience" filled with meaning. The realization of potentialities in an event or an object, felt and had by the subject-being, is the very experience of the quality that unifies the entire situation. The experience of immediate quality is pre-reflective in its own, but it is accompanied by the reflective experience and thereby provides the subject with its meaning and fulfillment in the final phase. Dewey's "an experience" depends on the pervasive quality that unifies the entire situation from its primacy to its ultimacy. The immediate quality experienced in the primary phase changes itself in each phase until the subject-being enjoys a meaningful, fulfilled experience in the consummatory phase by appreciating the pervasive quality. Such unifying "art as experience" is intrinsically related to the education. Aesthetic education includes aesthetic appreciation, aesthetic experience, and aesthetic knowledge. Aesthetic appreciation is possible when an "art play" achieves the status of "an experience", or when the quality of a work of art is felt and had. Furthermore, aesthetic education provides our children with opportunities of self-sufficiency and self-enclosedness in art plays and works of art and thereby makes aesthetic experience possible. Finally, aesthetic education effectively transmits aesthetic knowledge, or intellectuall methods for proper appreciation of works of art, developed by aesthetic criticism. This study recommends that these three functions should be the basis of the curriculum of aesthetic education.

孝의 글로벌리제이 : 글로벌리제이션 시대의 민족문화

곽준식,김순자,진규철 진주산업대학교 1997 산업과학기술연구소보 Vol.- No.4

Almost, society in the 1990's have serious problems such as drugs, violence, divorce. AIDS et al.. The problems throw a gloom over a human future. Then,a justification of the Filial piety concern about a reconstruction of social morality suggest to reappreciate the virtues and to exorcise a virtue centred moral. Korean society have serious social problems too. And a lot of Confucian argue to reappreciate the Confucian virtues such as filial piety and to exercise the Confucian virtue centred morality. In this virtues refer to educe the original nature with a social fomality by themselves, and the virtues rest on rational foundation which come from group thinking. A healthy man is in good health from physicai and spritually. The filial piety is what a guide to awakening and educe his the original pature by himself. Then We are able to reappeciate and to set forth the virtue centred morality. I thought that filial piety extend for national power.

존듀이의 윤리학에 대한 토미즘의 비판에 대한 연구

곽준식,김순자 진주산업대학교 1995 論文集 Vol.34 No.-

The purpose of this study is to investigate (1)the sturcture of J. Dewey's Ethics (2)the Critics of Thomism to J. Dewey's Ethics The result of this study as follows : As for Dewey, moral issues derive from the moral situations which require deep thought and judgment. Moral judgment is approved only when the behavior chosen after clarifying the relations between the indivudual's psychological and sociocultural elements actually conforms to the initial qualitative expectation. If the choice is made through moral judgment according to behavior logic, that choice is good. The good is a way of solving moral problems, and it is a situation which demands a better solution of men. The good is not an absolute moral item, but a social form which should be understood in terms of developmental relationship or logic. As such, the good becomes an item of social behavior, and it can be recognized by the objective standards of educational experience. Dewey's moral principles are composed of the answers to such questions as how the moral behaviors can be carried out 'interestignly' and 'efficiently'. That is, he is trying to find out how the moral behavior can give us psychological satisfaction or stability, and how we can carry out our common tasks reducing our social conflicts at the same time. Therefore, moral principles intend to integrate the psychological and social principles of behavior. In other words, a tentative situation is intended where the two principles function as one moral behavior. Dewey has helped us see the theoretical problems and practical issues of moral education more clearly and he has indicated a way in which the field of moral education in practice and theory can be investigated by the use of scientific procedures. He also had accelerated the moral education in school, emphasizing the ethical principles underlying education.

원발성 복막수염의 방사선학적 소견 : 초음파와 CT 소견

구자홍,송순영,이재균,김홍자,원영준 關東大學校 醫科大學 醫科學硏究所 1999 關東醫大學術誌 Vol.3 No.1

Purpose : To describe ultrasound(US) and CT findings of primary epiploic appendicitis Materials and Methods : From March, 1999 though Novemer 1999, clinical, US, and CT findings were reviewed in nine patients with primary epiploic appendicitis (eight women and one men, aged 27-54 year[mean, 36 years]). All patients performed US and four patients performed abdominal CT. The main symptoms were rapid onset, localized abdominal pain and tenderness(left lower quagrant pain[n=8], right abdominal pain[n= 1]) Results: US revealed small, ovoid, and mass are echogenic(n=7) or isoechoic(n=2) mass, located anterolateral to the colon. The echopattern of the mass are echogenic(n=7), or isoechoic(n=2). CT performed in four patients shown small oval fatty mass with a thin peripheral rim and central high attenuation area at anterolaeral side of the colon. Some streaky infiltration are associated around the fatty mass. Conclusion: Primary epiploic appendicitis has fairy. characteristic US and CT findings that enable a rapid diagnosis and valuable far differential diagnosit of other condition of acute abdomen.

초등학교 3·4학년의 진로 인식에 관한 연구 : 경기도 지역을 중심으로 Focused on Kyung-gi Province

김자성,최준섭 한국실과교육연구학회 2001 實科敎育硏究 Vol.7 No.2

The purpose of this study is to provide necessary data and information to career education by analyzing the future career cognition level of elementary school students in Kyong-gi province district. The students to the number of 437 of the 3rd and 4th grade students of elementary schools in Kyong-gi province were served as subjects for this study. They were selected by random stratified sampling from their living area. The results of this study were as follows: (1)Many students took pride of doing, and their own aims, original characters or talents. And also they had a tendency to take cognizance of their own original characters or talents as bettor as high economic status. (2)A number more than half students preferred professionals. Most students are interested in computer or playing in the air, and there are different tendencies according to gender. (3)The period of career cognition became earlier and earlier when they themselves first thought about their future career appeared to be the 1st grade and 2nd grade(43.7%). (4)The motives for career selection were ① mass-communication(39.6%) and ②parents ㆍ family ㆍ relatives(32.7%). But very few students(2.7%) wanted to take counsel with their teachers about their career problems.