• 제목/요약/키워드: S&T Theories

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마찰교반용접(FSW) 된 알루미늄 합금(AA6111-T4, AA5083-H18) 및 DP강 판재의 인장 실험시 파단 현상 해석 (Analysis of Failure Phenomena in Uni-axial Tension Tests of Friction Stir Welded AA6111-T4, AA5083-H18 and DP-Steel)

  • 박상준;엄기문;마닝;안강환;정경환;;;;정관수
    • 한국소성가공학회:학술대회논문집
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    • 한국소성가공학회 2007년도 춘계학술대회 논문집
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    • pp.258-261
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    • 2007
  • Failure phenomena in uni-axial tension test were experimentally and numerically investigated for AA6111-T4, AA5083-H18 and DP-Steel, which were friction-stir welded with the same and different thicknesses. Forming limit diagram(FLD) was measured using hemispherical dome stretching tests for base materials and also predicted by Hill's bifurcation and M-K theories for welded areas. Finite element simulations well predicted hardening behaviors, failure locations as well as failure patterns for the uni-axial tension tests especially utilizing very fine meshes and FLD along with stress softening.

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마찰교반용접(FSW) 된 알루미늄 합금(AA6111-T4, AA5083-H18) 및 DP강 판재의 인장 실험시 파단 현상 해석 (Analysis of Failure Phenomena in Uni-axial Tension Tests of Friction Stir Welded AA6111-T4, AA5083-H18 and DP-Steel)

  • 박상준;엄기문;마닝;안강환;정경환;;;;정관수
    • 소성∙가공
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    • 제16권4호
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    • pp.304-308
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    • 2007
  • Failure phenomena in uni-axial tension test were experimentally and numerically investigated for AA6111-T4, AA5083-H18 and DP-Steel, which were friction-stir welded with the same and different thicknesses. Forming limit diagram(FLD) was measured using hemispherical dome stretching tests for base materials and also predicted by Hill's bifurcation and M-K theories for welded areas. Finite element simulations well predicted hardening behaviors, failure locations as well as failure patterns for the uni-axial tension tests especially utilizing very fine meshes and FLD along with stress softening.

젠킨슨과 쉘렌버그의 기록학 이론 비교연구 (A comparative study on the archival theory of Hilary Jenkinson and Theodore R. Schellenberg)

  • 김상신
    • 기록학연구
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    • 제50호
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    • pp.61-95
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    • 2016
  • 오늘날 기록학이 하나의 전문성 있는 학문으로 자리를 잡기까지 수 많은 학자들의 노력이 있었다. 그 중 영국의 젠킨슨(Hilary Jenkinson, 1882~1961)과 미국의 쉘렌버그(Theodore R. Schellenberg, 1903~1970)는 현대 기록학의 등장에 있어 늘 거론되는 대표적인 학자로 여겨져 왔다. 젠킨슨과 쉘렌버그의 이론이 나온 지 50년이 지난 지금까지도 현대 기록관리 문제에 이들의 주장이 곳곳에 반영되어 있고, 기록학 실무를 하는 것에도 중요한 원리로 작용하고 있기 때문에 이들의 이론들을 연구하는 것은 가치가 있는 일이다. 하지만 국내에서는 젠킨슨과 쉘렌버그의 대표적인 기록학 이론서만 번역되어 출판됐을 뿐, 이들의 이론에 대한 직접적인 연구는 나오지 않았다. 본고에서는 젠킨슨과 쉘렌버그란 인물의 생애와 경력을 알아보고 그들이 주장했던 이론들을 당시 그들이 처했던 시대적 상황 속에서 탐구해 봄으로써 그들의 이론이 왜 차이가 있는지를 실증적으로 규명하고자 한다. 이를 위해 우선 젠킨슨과 쉘렌버그의 학문적 배경과 생애, 경력을 알아보고, 이어 아카이브의 정의와 평가, 아키비스트의 역할 및 교육관에 대한 그들의 견해를 하나씩 비교하고 이에 관해 논하고자 한다.

3D-CT를 이용한 흉추의 극돌기와 횡돌기 사이의 관계에 대한 연구 (Studies about Anatomical Relationships between the spinous and transverse processes of the thoracic spine using 3D-CT)

  • 금지혜;백동기;고현일;하원배;이정한
    • 척추신경추나의학회지
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    • 제14권2호
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    • pp.135-146
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    • 2019
  • Objectives : There are many theories about the anatomical relationships between the thoracic spinous and transverse processes. However, these studies were all conducted on cadavers. Thus, there might be differences when applied to living individuals. Therefore, the aim of this study was to determine whether the theories were similar when measured in living individuals. Methods : We conducted studies with 10 individuals aged 20-30 using 3D-CT. Four different measurements were taken between the thoracic spinous and transverse processes. To facilitate the relationship analysis, the spinous process positioned between the traverse process of the segment and the lower segment was set to 0.5. The spinous process located at the height of the traverse process of the lower segment was set to 1. The spinous process located between the traverse process of the lower segment and the two segments below was set to 1.5. Results : Therefore, based on the aforementioned settings, T1-T4 were 1, T5-T7 were 1.5, T8-T10 were 1, and T11 and T12 were 0.5. This indicated that the spinous processes of T1-T4 and T8-T10 were equal in height to the transverse processes of the lower segment, and that T5-T7 were at the midpoint of the height of the transverse processes between the lower segment and two segments below, and T11, T12 corresponded to the midpoint between the traverse process of the segment and the lower segment. Conclusions : Neither 'Geelhoed's rule'nor 'the rule of three'was accurate when applied to living individuals. However, this study had some limitations, so further research is needed.

If I Can't See Well, I Don't Like the Website: Website Design for Both Young and Old

  • Im, Hyunjoo;Lee, MiYoung
    • 한국의류학회지
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    • 제38권4호
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    • pp.598-609
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    • 2014
  • The increased use of online shopping by older consumers means that online retailers need to consider older consumers when designing websites. We investigated the specific characteristics of commercial websites (i.e., perceptual fluency) through an online experiment. Guided by perceptual fluency and affect optimization literature, hypotheses highlighting older consumers' responses to websites were proposed and tested. Results confirmed that older consumers (in their 50s) are more generous in evaluating online retailers' websites than younger consumers (in their 20s) and that responses to websites are dependent on perceptual fluency. The findings are consistent with previous research and provide additional support for theories that deal with an online apparel shopping context. Practical implications and limitations are discussed.

地域地理 敎育의 內容 構成과 學習 理論의 照應 (Regional Geography in Education and the Learning Theories)

  • 권정화
    • 대한지리학회지
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    • 제32권4호
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    • pp.511-520
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    • 1997
  • 본 연구에서는 학습 과정을 고려하여 지역지리의 교육 내용을 구성하는 원리를 도출하고자 시도하였다. 학습 과정에 대한 기존의 견해들은 학습이 진행되는 과정에서 새로운 지식이 누적되는 과정을 강조하는 입장과 새로운 지식이 기존의 사고들에 따라 조직되는 과정을 강조하는 입장으로 구분지을 수 있다. 그러나 이러한 두 가지 견해들은 학습 과정을 靜態的인 것으로 가정한다는 문제점을 지니고 있다. 본 연구에서는 기존의 학습한 지식과 새롭게 학습하는 지식 간의 순환적인 상호작용이 존재하며, 학생들은 態動的인 構成的 過程을 통하여 知識을 지니게 된다는 견해를 대안으로 제시하였다. 이러한 견해를 지역지리 교육에 적용하면 학생들의 私的 地理와 公的 地理 간의 循環을 강조하게 되며, 따라서 본 연구에서는 학생들의 生活世界에 대한 私的 地理로부터 교육 내용을 구성해야 한다고 제시하였다.

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알루미늄 합금 형재의 열간압출 금형설계 (A Design of Dies for Hot Extrusion of Structural Shapes from Aluminum Alloys)

  • 조해용;김관우;최재찬
    • 한국정밀공학회:학술대회논문집
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    • 한국정밀공학회 1997년도 추계학술대회 논문집
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    • pp.531-534
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    • 1997
  • A design system of dies for hot extrusion of structural shapes such as Z' s, L' s, T' s, U' s and H' s from aluminum alloys was developed in this study. The developed design system of dies is based of established die design rule system. The design rules for die design are obtained from the handbooks, plasticity theories and relevant references. The environment of the system is AutoCAD and AutoLISP, the graphic programming language was used for the configuration of the system. This system includes five major modules such as section shape design module, die opening number module. die opening layout module, die correction module and die bearing design module that are used to determine design variables. This system would be used to design of dies for hot extrusion from aluminum alloys and widely used in manufacturing course..

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The Product Market Strategies of Korean Knitwear Companies

  • Lee, Yoon-Mee;Park, Jae-Ok;Lee, Youn-Hee
    • The International Journal of Costume Culture
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    • 제7권1호
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    • pp.48-57
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    • 2004
  • The purpose of this study is to investigate how three factors--designer's capability, product market strategy, and product organization--supposed to determine the design process are related to each other. These factors influence Korean knitwear companies' market performances. For this purpose, we did not only library research on relevant theories such as the transaction cost economics but also empirical research largely based on a questionnaire. The respondents of the questionnaire were 59 designers, merchandisers(MDs), and top managers of knitwear companies located in Seoul. We analyzed the collected questionnaire data by using such statistical tools as χ²-test, t-test, and one-way ANOVA. Findings of this study were as follows. While there was a significant relation between organization form and designer's capability, no significant difference in designer's capability was found between trust enhanced network and unenhanced network. No significant relation was found between organization form and product market strategy, in discordance with Carney's arguments. Also, it appeared that there was no significant relationship between knitwear companies' product market strategies and their designers' capabilities.

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금원사대가의학(金元四大家醫學)이 조선조의학(朝鮮朝醫學) 형성(形成)에 미친 영향(影響) (The influence of the four noted physicians of Geum-Won era on the completion of the medicine in the Chosun dynasty)

  • 정면;홍원식
    • 대한한의학원전학회지
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    • 제9권
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    • pp.432-552
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    • 1996
  • The influence of the four noted physicians of Geum-Won era(金元代) on the completion of the medicine in the Chosun dynasty(朝鮮朝) can be summarized as follows. 1. The four noted physicians of Geum-Won era were Yoo-Wan-So(劉完素), Jang-Jong-Jung(張從正), Lee-Go(李杲), Ju-Jin-Heung(朱震亨). 2. Yoo-Wan-So(劉完索) made his theory on the basic of Nae-Kyung("內經") and Sane-Han-Lon("傷寒論"), his idea of medicine was characterized in his books, for exemple, application of O-Oon-Yuk-Ki(五運六氣), Ju-Wha theory(主火論) and hang-hae-seng-je theory(亢害承制論). from his theory and method of study, many deviations of oriental medicine occurred. He made an effort for study of Nae-Kyung, which had been depressed for many years, on the contrary of the way old study that Nae-Kyung had been only explained or revised, he applied the theory of Nae-Kyung to clinical care. The theory of Yuk-Gi-Byung-Gi(六氣病機) and On-Yeul-Byung(溫熱病) had much influenced on his students and posterities, not to mention Jang-Ja-Wha and Ju-Jin-Heung, who were among the four noted physicians therefore he became the father of Yuk-Gi(六氣) and On-Yeul(溫熱) schools. 3. Jang-Jong-Jung(張從正) emulated Yoo-Wan-So as a model, and followed his Yuk-Gi-Chi-Byung(六氣致病) theory, but he insisted on the use of the chiaphoretic, the emetic and the paregoric to get rid of the causes, specially he insisted on the use of the paregoric, so they called him Gong-Ha-Pa(攻下派). He insisted on the theory that if we would strenthen ourselves we should use food, id get rid of cause, should use the paregoric, emetic and diaphoretic. Jang-Jong-Jung'S Gang-Sim-Wha(降心火) theory, which he improved Yoo-Wan-So's Han-Ryang(寒凉) theory influenced to originate Ju-Jin-Heung'S Ja-Eum-Gang-Wha(滋陰降火) theory. 4. Lee-Go(李杲) insisted on the theory that Bi-Wi(脾胃) played a loading role in the physiological function and pathological change, and that the internal disease was originated by the need of Gi(氣) came from the disorder of digestive organs, and that the causes of internal disease were the irregular meal, the overwork, and mental shock. Lee-Go made an effort for study about the struggle of Jung-Sa(正邪) and in the theory of the prescription he asserted the method of Seung-Yang-Bo-Gi(升陽補氣), but he also used the method of Go-Han-Gang-Wha(苦寒降火). 5. The authors of Eui-Hak-Jung-Jun("醫學正傳"), Eui-Hak-Ib-Moon("醫學入門"), and Man-Byung-Whoi-Choon("萬病回春") analyzed the medical theory of the four noted physicians and added their own experiences. They helped organizing existing complicated theories of the four noted physicians imported in our country, and affected the formation of medical science in the Choson dynasty largely. Eui-Hak-Jung-Jun("醫學正傳") was written by Woo-Dan(虞槫), in this book, he quoted the theories of Yoo-Wan-So, Jang-Jong-Jung, Lee-Go, Ju-Jin-Heung, especially, Ju-Jin-Heung was respected by him, it affected the writing of Eui-Lim-Choal-Yo("醫林撮要"). Eui-Hak-ib-Moon("醫學入門"), written by Lee-Chun(李杲), followed the medical science of Lee-Go and ju-jin-heung from the four noted physicians of Geum-Won era. Its characteristics of Taoism, idea of caring of health, and organization affected Dong-Eui-Bo-Kham("東醫寶鑑"). Gong-Jung-Hyun(龔延賢) wrote Man-Byung-Whoi-Choon("萬病回春") using the best part of the theories of Yoo-Wan-So, Jang-Jong-Jung, Lee-Go, Ju-Jin-Heung, this book affected Dong-Eui-Soo-Se-Bo-Won("東醫壽世保元") partly. 6. our medical science was developed from the experience of the treatment of disease obtained from human life, these medical knowledge was arranged and organized in Hyang-Yak-Jib-Sung-Bang("鄕藥集成方"), medical books imported from China was organized in Eui-Bang-Yoo-Chwi("醫方類聚"), which formed the base of medical development in the Chosun dynasty. 7. Eui-Lim-Choal-Yo("醫林撮要") was written by Jung-Kyung-Sun(鄭敬先) and revised by Yang-Yui-Soo(楊禮壽). It was written on the base of Woo-Dan's Eui-Jung-Jun, which compiled the medical science of the four noted physicians of Geum-Won era. It contained confusing theories of the four noted physicians of Geum-Won era and organized medical books of Myung era, therefore it completed the basic form of Byun-Geung-Non-Chi (辨證論治) influenced the writing of Dong-Eui-Bo-Kham("東醫寶鑑"). 8. Dong-Eui-Bo-Kham("東醫寶鑑") was written on the base of basic theory of Eum-Yang-O-Haeng(陰陽五行) and the theory of respondence of heaven and man(天人相應說) in Nae-Kyung. It contained several theories and knowledge, such as the theory of Essence(精), vitalforce(氣), and spirit(神) of Taoism, medical science of geum-won era, our original medical knowledge and experience. It had established the basic organization of our medical science and completed the Byun-Geung-Non-Chi (辨證論治). Dong-Eui-Bo-Kham developed medical science from simple medical treatment to protective medical science by caring of health. And it also discussed human cultivation and Huh-Joon's(許浚) own view of human life through the book. Dong-Eui-Bo-Kham adopted most part of Lee-Go(李杲) and Ju-Jin-Heung's(朱震亨) theory and new theory of "The kidney is the basis of apriority. The spleen is the basis of posterior", so it emphasized the role of spleen and kidney(脾腎) for Jang-Boo-Byung-Gi(臟腑病機). It contained Ju-Jin-Heung's theory of the cause and treatment of disease by colour or fatness of man(black or white, fat or thin). It also contained Ju-Jin-Heung's theory of "phlegm break out fever, fever break out palsy"(痰生熱 熱生風) and the theory of Sang-Wha(相火論). Dong-Eui-Bo-Kham contained Lee-Go's theory of Wha-Yu-Won-Bool-Yang-Lib (火與元氣不兩立論) quoted the theory of Bi-Wi(脾胃論) and the theory of Nae-Oi-Sang-Byun(內外傷辨). For the use of medicine, it followed the theory by Lee-Go. lt used Yoo-Wan-So'S theory of Oh-Gi-Kwa-Keug-Gae-Wi-Yul-Byung(五志過極皆爲熱病) for the treatment of hurt-spirit(傷神) because fever was considered as the cause of disease. It also used Jang-Jons-Jung's theory of Saeng-Keug-Je-Seung(生克制勝) for the treatment of mental disease. 9. Lee-je-ma's Dong-Eui-Soo-Se-Bo-Won("東醫壽世保元") adopted medical theories of Song-Won-Myung era and analyzed these theories using the physical constitutional theory of Sa-Sang-In(四象人). It added Dong-Mu's main idea to complete the theory and clinics of Sa-Sang-Eui-Hak(四象醫學). Lee-Je-Ma didn't quote the four noted physicians of Geum-Won era to discuss that the physical constitutional theory of disease and medicine from Tae-Eum-In(太陰人), So-Yang-In(少陽人), So-Eum-In(少陰人), and Tae-Yang-In(太陽人) was invented from their theories.

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상습절도행위에 대한 몇 가지 범죄심리학적 고찰 - 조OO의 경우를 중심으로 - (A Psychologico - criminological Approach on the Hardened Stealing Habit - The case of Mr. Cho OO -)

  • 이규화
    • 시큐리티연구
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    • 제4호
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    • pp.189-218
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    • 2001
  • Mr. Cho OO, a famous ex-delinquent who has already spent 27 years in prison for his hardened stealing habit and escape, was recently again arrested by Japanese police for housrbreaking in Japan. Every Korean people would have believed that he had abandoned his habit for good, because, since his liberation in 1998 , he showed himself as a man perfectly cured. He became a believer more than ever, married a well-to-do beautiful woman, got a son from her, had a good income from his job as homme security counsellor and from several other occupations, and after all worked a lot for homeless and unfortunate. Now, his case is given as an important subject to approach for criminologists. As well as we are concerned, we thought, to explain his case criminological, it's primarily necessary to skim through the main criminological theories, and that in behalf of this case. After that, we will be able to decide which theory is mostly appropriate to explain his inveterate disease. The one we chose is the social learning theory. But this theory alone won't allow us to understand all aspects of his crime. This is why we will have to turn to several other theories to complete our explanation. But theoretical understanding alone of a criminal case is useless if it cannot suggest a remedy for it. And, we finish our study by making some suggestions on this case.

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