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.

脇痛의 鍼灸治療穴에 對한 文獻的 考察

朴基榮,李浚龜,金永一,朴泰均,辛泳一,黃載然,李賢,李秉烈 대전대학교 한의학연구소 2002 한의학연구소 논문집 Vol.10 No.2

As mentioned above, I have acquired some valuable results about medical treatment with acupuncture and Moxibustion of " Flank pain" after studying oriental medical books . The results Were like below: 1. Medical treatment with acupunctures of Flank pain belonged to the Urinary Bladder Meridian of Foot Taiyang, the Liver Meridian of Foot Jueyin, the Gall Bladder Meridian of Foot Shaoyang. 2. Medical treatmcnt with acupunctures of Flank pain used to Yang-laung-chan(陽陵泉), Gi-gu(支溝), Gi-mun(期門), Kan-su(肝兪) in turn. 3. Medical treatment with Ear acupunctures of Flank pain used to Dam(膽), Sin-Mun(神門), Gan(肝)in turn 4. Acupuncture point of Flank pain were lowrer limb part. chest and abdominal part, back part in turn. 5. Medical treatment with Moxibustion of Flank pain was the most Jang-mun(章門)

매크로/마이크로 레벨 볼트 결합 구조물에서의 실험적/해석적 방법을 통한 시스템 특성 비교

김봉석,이성민,이문구,이수훈,Jun Ni,송준엽,이창우,하태호 한국공작기계학회 2006 한국공작기계학회 추계학술대회논문집 Vol.2006 No.-

As the micro technology and miniaturization of a structure and component in the last couple of decades have been concretely realized, the understanding of structural and dynamic characteristics and prediction of dynamic behavior are indispensable to the miniaturized structures and micro machines. This paper shows the effect of dynamic characteristics in bolt-jointed structures by comparing natural frequencies and mode shapes between macro and micro-scale beams through experimental modal analysis and finite element analysis with a1 8 test models by materials, by size, and by joining condition; that is, SS41 and A16061-T651, micro and macro, and monolithic beam and bolt-jointed beam.

교잡종 찰옥수수에 대한 연구 : Ⅱ. 새로 육성된 찰옥수수 교잡종 "대덕찰"에 대한 농업적 특성 Ⅱ. Agronomic Characteristics of the New Waxy Hybrids "Daedukchals"

이희봉,김효기,김동욱,김준표,정재영,최현구,강윤규 충남대학교 농업과학연구소 2002 농업과학연구 Vol.29 No.2

1. 새로 육성된 4개의 대덕찰 찰옥수수 교잡종에 대한 간장은 대조구인 찰옥 1호보다 큰 반면에 개화기는 약 4∼7일 늦었으며, 모든 공시 교잡종의 주당 분얼수는 한 개이하의 무효분얼로 나타났다. 2. 새로 육성된 대덕찰옥수수의 이삭길이와 직경은 대조구인 찰옥 1호보다 크게 나타났으며, 특히 대덕찰옥수수 1호와 2호의 과피두께는 대구조보다 얇았고, 당도 역시 높게 나타나 우수 교잡종으로 평가되었다. Stem height of the new developed "Daedekchals" waxy hybrids were higher than check hybrid. Chalok #1, while days to tasseling were delayed about four to seven days. Number of tillers per plant of the these new hybrids including check were appeared to be one less as non-effective tiller. Ear length and diameter of the new waxy hybrids were longer and thicker than check, respectively. In addition pericarp thickness of the Daedekchal #1 and #2 among new developed waxy hybrids were thinner and sugar content were higher than check.

강박증 환자에서의 인격장애 공존병리에 관한 연구

이동우,강웅구,류인균,정도언,조맹제,우종인,김용식,권준수 大韓神經精神醫學會 2001 신경정신의학 Vol.40 No.3

연구목적 : 강박증의 동반인격장애에 관한 연구들은 기존의 개념과 달리 강박성 인격장애와 강박증 간에는 특이적인 관계가 없으며, 강박증 환자들은 다양한 인격장애를 동반한다는 결과를 보여주었다. 그러나 이러한 연구들은 동반 인격장애에 관한 기술적인 분석에 그쳤고, 강박증 환자군의 임상 증상과 동반 인격장애 양상간의 연관성에 관한 분석을 시행하지 않았다. 본 연구의 목적은 강박증 환자군에서의 동반 인격장애를 평가하고 강박증 환자의 다양한 증상과 동반 인격특성 간의 연관성에 대해 연구하는 것이다. 방 법 : DSM-IV의 강박증의 진단기준을 만족하는 59명의 환자군과 32명의 정상대조군을 대상으로 인격장애 질문지를 적용한 후 4∼6점의 절단점을 기준으로 인격장애의 진단이 내려졌다. 먼저 환자군과 정상대조군 간의 특정 인격장애 빈도의 차이를 알아보기 위하여 Fisher's exact test를 시행한 후, 두집단 간에 유의한 차이가 있는 것으로 밝혀진 인격장애 척도 점수에 미치는 Y-BOCS,BDI,BAI점수의 영향을 알아보기 위하여 다중선형회귀 분석을 시행하였다. 결 과 : 1) Fisher's exact test 결과 강박증 환자군은 정상 대조군에 비해 경계성 인격장애(18.6%vs 0%, p=0.007). 회피성 인격장애(55.9% vs 18.8%, p=0.001), 우울성 인격장애(40.7% vs 0%, p=0.000)의 비율이 유의하게 높았다. 2) 다중선형회귀분석 결과 Y-BOCS 점수 (t=2.10, p=0.043)와 BAI점수(t=2.60, p=0.014)는 경계성 인격장애 점수에 유의한 영향을 주는 것으로 나타났다. 또한 BAI점수(t=3.23, p<0.003)는 회피성 인격장애 저수에, BDI점수 (t=3.08, p=0.004)는 우울성 인격장애 점수에 유의한 영향을 주는 것으로 나타났다. 결 론 : 강박증 환자군은 정상 대조군에 비해 회피성 인격장애, 우울성 인격장애, 경계성 인격장애의 동반율이 높고, 강박증이 경계성 인격장애의 심각도에 유의한 영향을 미치는 것으로 사료된다. The purpose of this study was to assess the comorbid axis-Ⅱ disorders of obsessive compulsive disorder(OCD) patients and to investigate the relationship between symptoms of OCD and the comorbid personality traits. The subjects were 59 patients who met DSM-IV criteria for obsessive-compulsive disorder and 32 normal controls. All subjects completed personality Disorder Questionnaire-IV(PDQ-IV). The patients completed Beck Depression Inventory(BDI) and Beck Anxiety Inventory(BAI), and were rated with Yale-Brown Obsessive Compulsive Scale(YBOCS). The results were as follows. 1) The OCD patients showed significantly higher prevalence of avoidant, depresssive and borderline personality disorder(p<0.01) compared to controls. 2) The BAI score had significant effect on the avoidant personality score(t=3,23, p<0.003). The BDI score had significant effect on the depressive personality score(t=3.08, p=0.004). The YBOCS(t=2.10, p=0.043) and BAI(t=2.60, p=0.014) scores had significant effects on the borderline personality score. We found that OCD patients had higher prevalence of avoidant, depressive, and borderline personality disorders. We also found that obsessive-compulsive symptoms have significant effect on the severity of borderline personalty traits. We suggest that it would be very helpful to consider Axis-Ⅱ disorders for managing patients with obsessive-compulsive disorder.

日本「開放大學」에 關한 調査硏究 : The university of Tsukuba 「Open University」System

李俊球 弘益大學校 1982 弘大論叢 Vol.14 No.1

The founding philosophy of the University of Tsukuba is in many respects that of an 「open University」 both in national terms and in international terms. Existing Universities are often confined in Marrow specialty arers, inviting the stagnation and hardening of both research and technology and encouraging isolation from real Society, The University of Tsukuba. with this problem in mind, maintains a constant relationship with changing modern Society, and a flourishing international character, while developing more over, a new organization for he functions and administration of research and teaching on a basis of diversity and flexibility. The objectives of the University are therefor, in respect of the pure and applied sciencs, to doepen free and rigorous exchange and liaison between the organs of reseach and teaching on the one hand, and Society at home and abroad on the other hand; to pursue research and teaching while bringing internasonal Cooperation to fruition, and there by to educate able people with a creative intelligence and arich humanity;and to Contribute to the development of science and culture.

近代化의 特性에 關한 一硏究

李俊球 弘益大學校 1983 弘大論叢 Vol.15 No.1

1) Modernization is the Current term for an old process-the process of social change where by less developed societies acquire characteristics common to more developed Societies. The process is activated by international or intersocietal, Communication. 2) Modernization, therefore, is the process of Social change in which development is the economic component. Modernization produces the Societal environment in which rising output per head is effectively in - corporated, for effective incorporation, the heads that produce (and consume) rising output must understand and accept the new rules of the game deeply enough to improve their own productive behavior and to diffuse it througbout their Society. 3) The history of china and Japan in the Second half of the nineteenth century without coming to the conclusion that suchfactors as social structure value, systems, and guiding ideals have an important bearing on modernization and economic grouth-indeed, more bearing than physical factors such as natural resources or even the factor of outside stimulus.

유색미에 관한 연구 : Ⅰ. 감마선 처리에 의해 유래된 Dohoku 유색미 돌연변이체의 주요 특성 Ⅰ. Characteristics of Dohoku color rice mutants derived by Gamma-ray Mutagenesis

이희봉,최현구,김동욱,김준표,정재영,정종태 충남대학교 농업과학연구소 2002 농업과학연구 Vol.29 No.2

1. 돌연변이체 DM-1과 DM-2의 간장은 양친인 Dohoku나 대구조인 흑진주벼보다 짧은 반면에 출수기는 7일내지 20일가량 늦어졌다. 2. 이들 DM-1과 DM-2의 수장은 대조구와 비슷하였으나 주당 이삭수는 대조구와 같이 DM-2에서 매우 많았다. 3. 선발된 계통들에 대한 주당 영화수는 대조구보다 적었으나 영색은 갈색내지 짙은 자주색으로 다양한 변이를 보였고 까락길이 역시 변이가 컸다. 4. 안토치안 색소에 대한 공시계통간 차이를 optical density(OD_(530))값으로 나타낸 결과 DM-2 변이계통에서 2.23, DM-3 변이계통에서 2.26으로 나타나 대조구인 흑진주벼의 2.59보다 크게 낮았다. Culm length of Dohoku mutant 1(DM 1) and mutant 2(DM 2) were shorter than Dohuko parent and Heukjinjubyo check, while days to heading were delayed seven to 20 days Panicle length of these were similar to check and number of panicle per plant of DM 2 was highly appeared than check. Spikelets per plant of the selected lines were lower than check, and glume color of these were varied from brown to dark purple and awn length was also varied according to line used. Anthocyanin content of each mutant line as measured by 530㎚ were lower than that of check in that OD 2.23 and OD 2.26 for DM 1 and DM 2, respectively, and 2.59 for check.

靑少年問題에 一關한 硏究 : Mainly on the analysis of World YouthㆍConsciousness 世界 靑年意識 調査分析을 中心으로

李俊球 弘益大學校 1977 弘大論叢 Vol.9 No.-

This study adopts the Report on World Consciousness which was pnblished in 1973 and compares Korean Youth consciousness with that of American German and Japan Youth. This study gives good research materials. Esrecially Japan has some problems in common with Korea. Therefore I conclude that Korea and Japan help to solve the Youth problem each other, putting special emphasis on the 18 or19 year old youth.

60年代의 新興諸國(亞細亞 . 아프리카)의 政治發展에 關한 硏究

李俊球 弘益大學校 1984 弘大論叢 Vol.16 No.1

1. Truth and ideology; The question of the relationship between truth and ideology has been raised by the tradition of European thought which culminated in marxism and in the sociology of knowledge developed by Mannheim according to this view, ideology is by its nature untruthful, since it entails a "masking" or "veiling" of unavowed and unperceived motives or "interests." These interests impel the deception of antagonists and the transfiguraton of narrow sectional ends and interests by means of an ostensible universalization. They distort reality for the ideologists and for their antagonists. Thus, in this view, ideology is a manifestation of a "false consciousness." 2. The spread of nationalism ; The twentieth century has added another revolutionary dimension to nationalism. Nationalism has also become a socially revolutionary movement, demanding equal economic and educational opportunities for all members of the national group and the active promotion of the welfare of the socially underprivileged classes. Its aims have become the establishment of a classless, theoretically equalitarian century, all "young" nationalist movements had also become "socialist" movements-the word "socialism" covering as many different manifestations as the word "nationalism"-whereas the "young" nationalist movements of the middle of the nineteeth century had sharply distinguished between nationalism and socialism. 3. Socialism-By 1840 the term "socialism" was commonly used throughout Europoto Connote the doctrine that the ownership and control of the means of production-capital, land, or property-should be held by the community as a whole and administered in the interests of all. Within 120 years after the term became known in Europe, the doctrine had spread so widely that one could find regimes in Sweden, Great Britain, the Soviet Union, China, Eastern Europe, Cuba, Algeria, Egypt, Syria, Israel, Guinea, Kneya, Tanzania, India, Burma, an Ceylon calling themselves socialists, and the labels Arab socialism, and Asian socialism used to describe the grafting of indigenous traditions onto ideological doctrine. Rarely in the history of the world has an idea taken hold so deeply and dispersed so quickly. One would have to go back to the spread of Lslam, in the century and a half following the death of Muhammad, to find a comparable phenomenon. And the analogy is not without relevance, for one finds in both instances the promise of a perfect community. The effort to create a solidarity larger than that of tribe or class, a reaction to the meaninglessness of existing religious bleiefs, a militant proselytizing spirit, and leadership by new elites. In fact, the comparison with Lslam is meant to suggest that the spread of socialism cannot be wholly accounted for in economic or class terms, The socialist movement has(or had) the character of a secular religion, and only from this view can one explain its development and internal vicissitudes.