고온.고습 환경 하에서의 계면수 변화에 따른 CFRP모자형 단면 부재의 압궤특성

양용준,차천석,양인영,Yang, Yong-Jun,Cha, Cheon-Seok,Yang, In-Young 한국생산제조학회 2009 한국생산제조학회지 Vol.25 No.4

It is important to satisfy the requirements and standards for the protections of passengers in a car accident. There are lots of studies on the crushing energy absorption of a structure members in automobiles. We have studied to investigate collapse characteristics and moisture absorption movements of CFRP(Carbon Fiber Reinforced Plastics) hat shaped sectional members when CFRP laminates are under the hygrothermal environment. In particular, the absorbed energy, mean collapse load and deformation mode were analyzed for side members which absorbed most of the collision energy. Variation of CFRP interlaminar numbers is important to increase the energy absorption capability. Therefore we have made a static collapse experiment to research into the difference of absorbed energy and deformation mode between moisture absorbed specimen and non-moisture absorbed.

적층각도 변화를 갖는 CFRP 모자형 단면부재의 열습 및 충격손상 평가

양용준,심재기,Yang, Yong-Jun,Sim, Jae-Ki 한국생산제조학회 2010 한국생산제조학회지 Vol.26 No.1

It is important to satisfy the requirements and standards for the protections of passengers in a car accident. There are lots of studies on the crushing energy absorption of a structure member in automobiles. In this paper, we have studied to investigate collapse characteristics and moisture absorption movements of CFRP( carbon fiber reinforced plastics) structure members when CFRP laminates are under the hygrothermal environment. In particular, the absorbed energy, mean collapse load and deformation mode were analyzed for CFRP members which absorbed most of the collision energy. Also, variation of stacking angle is important to increase the energy absorption capability. The purpose of this study is to evaluate the strength reduction and moisture absorption behavior of CFRP hat shaped member. Therefore we have made a impact collapse experiment to research into the difference of absorbed energy and deformation mode between moisture absorbed specimen and non-moisture absorbed. As a result, the effect of moisture absorption and impact loads of approximately 50% reduction in strength are shown.

피브리노겐의 수치 및 중요한 아미노산 변형 돌연변이가 뇌중풍에 미치는 영향

양용준,신용철,고성규,Yang, Yong-Jun,Shin, Yong-Cheol,Ko, Seong-Gyu 대한예방한의학회 2010 대한예방한의학회지 Vol.14 No.1

Backgrounds : Stroke is characterized by loss of brain functions due to a disturbance in the blood vessels supplying blood to the brain, and classified into hemorrhage and ischemia. Stroke is known to be affected by genetic factors and other diseases such as hypertension and cardiovascular diseases. However, the distinctive association between stroke and genetic variations has not discovered yet. Objectives : This study investigated the effects of fibrinogen level and genetic variations in FGA (Fibrinogen alpha chain) gene on stroke in Korean stroke patients and controls. Methods : DNA samples from 674 stroke patients diagnosed by Oriental medical hospitals and 267 controls were used in this study. Two common single nucleotide polymorphism(SNP) with high minor allele frequency(MAF), rs2070011G/A of promoter region and nonsynonymous rs6050A/G of exon 5 in FGA gene, were targeted for Taqman genotyping. Because the TOAST classification is important to the factors and symptoms of stroke, ischemic patients were further classified into five subtypes using diagnosis and clinical data. One-way ANOVA and chi-square test were used for clinical data and genetic association, respectively. Haploview v4.1 program was used for linkage disequilibrium(LD), haplotype and haplotype block analysis. Results : The levels of red blood cells and fibrinogen from clinical data were shown to be significant factors for the sub-groups of TOAST classification. No significant associations of stroke, hemorrhage, ischemic and subtypes of TOAST with rs2070011 and rs6050 of FGA gene were found(P > 0.05). However, rs2070011 in promoter region and nonsynonymous rs6050 in exon 5 which produce the amino acid change from threonine to alanine showed a haplotype block and three haplotypes of A-G, G-A, A-A, suggesting that rs2070011 and rs6050 might be co-segregated in generic recombination. Although A-A haplotype of stroke patients showed 64-69% low frequency compared to controls, there was no significant association between stroke and haplotype(P > 0.05). Conclusion : This study showed that there was no significant association between stroke and two SNP of rs2070011G/A and nonsynonymous rs6050A/G in FGA gene. However, these two SNP compose a haplotype block and three haplotypes of A-G, G-A, A-A. This finding suggests that rs2070011 and rs6050 are so close as to be positioned as linkage disequilibrium. Nevertheless, no significant association between haplotypes and stroke was found.

열습환경 하에서의 적층각도 변화에 따른 CFRP 모자형 단면부재의 압궤특성

양용준,양인영,심재기,Yang, Yong-Jun,Yang, In-Young,Sim, Jae-Ki 한국생산제조학회 2009 한국생산제조학회지 Vol.25 No.1

It is important to satisfy the requirements and standards for the protections of passengers in a car accident. There are lots of studies on the crushing energy absorption of structure members in automobiles. We have investigated collapse characteristics and moisture absorption movements of CFRP(Carbon Fiber Reinforced Plastics) hat shaped sectional members when CFRP laminates are under the hygrothermal environment. The absorbed energy, mean collapse load and deformation mode were analyzed for side members which absorbed most of the collision energy. Therefore we have made a static collapse experiment to research into the difference of absorbed energy and deformation mode between moisture absorbed specimen and non-moisture absorbed specimen.

정중성의 의미와 기법

양용준(Yang Yong-Jun) 신영어영문학회 2003 신영어영문학 Vol.25 No.-

The purpose of the present paper is to survey and examine the meaning and technique of Politeness in communication. Grice proposed the Cooperative Principle composed of four maxims, which services as a guideline for language use on the basis of communicating information. The Politeness Principle, based on interpersonal relationships of the interlocutors, is as important as the Cooperative Principle because the Politeness Principle can make our relationships run more smoothly, which the Cooperative Principle cannot do. The Politeness is an important rule to guide the whole communication, not just local and unessential parts. To keep smooth relations in interpersonal communication, Politeness is much better and more important than rudeness. The Politeness Principle is composed of a tact maxim, generosity maxim, approbation maxim, modesty maxim, agreement maxim and sympathy maxim. There are two meanings of Politeness; the conceptual meaning and the mental (psychological) meaning. The conceptual meaning of Politeness is general meaning and the mental (psychological) meaning is the internal and mental meaning of person. Anyway, the two meanings, conceptual meaning and mental(psychological) meaning are a very important in interpersonal communication. There is a technique to realize the Politeness. It is relaxed the direct factor when the speaker speaks. Thus, the hearer can feel comfortable from the speaker's consideration. Both the speaker and hearer in living communication need Politeness. They have to think about Politeness all the time.

영어의 통사ㆍ의미적 상과 상 표지

양용준 ( Yang Yong-jun ) 대한영어영문학회 2008 영어영문학연구 Vol.34 No.4

The purpose of this paper is to survey and analyze the English syntacticㆍsemantic aspect and aspectual marker. Originally, aspect was understood as characteristics which verbs mean, however, aspect concepts have changed with the development of transformational generative grammar. In traditional grammar, aspect was not well known to people. However, I’d like to reveal the aspect into the surface through this paper. I divided aspect into syntactic aspect and semantic aspect. Of course, it is a view-point’s difference. Also, I insist that there are aspectual markers in English. They are “have+pp” and “be+-ing” in syntactic aspect and there are many kinds of aspectual markers in semantic aspect. From now on, we have to know aspect and tense differently. Although they have very similar points, I suggest that we have to classify them clearly. (Cheju National University)

곡률이 다른 직교이방성 CFRP 적층쉘의 관통파괴특성

양용준 ( Yong Jun Yang ),편석범 ( Seok Beom Pyeon ),차천석 ( Cheon Seok Cha ),양인영 ( In Young Yang ) 한국안전학회(구 한국산업안전학회) 2016 한국안전학회지 Vol.31 No.6

CFRP composite laminates are widely used as structural materials for airplanes, automobile and aerospace vehicles because of their high strength and stiffness. This study aims to examine an effect of curvature on the penetration fracture characteristic of an orthotropic composite laminated shell. For the purpose, we manufactured orthotropic CFRP shell specimen with different curvatures, and conducted a penetration test using an air-gun. Those specimens were prepared to varied curvature radius(∞, 200mm, 150mm and 100mm)and were stacked to [O°3/90°3]s. When the specimen is subjected to transverse impact by a steel sphere(Φ10), the velocity of steel sphere was measured both before and after impact by determining the time for it to pass two ball-screen sensors located a known distance apart. As the curvature increases, the absorption energy and the critical penetration energy increased linearly because the resistance to the bending moment. Patterns of cracks caused by the penetration of CFRP laminated shells included fiber breakage, lamina fracture, matrix crack interlaminar crack and intralaminar crack.

AL 박육부재의 에너지 흡수 제어특성

양용준(Yong-Jun Yang),양인영(In-Young Yang) 한국생산제조학회 2008 한국생산제조학회지 Vol.17 No.1

영어와 한국어 진행상의 의미론적 연구

양용준(Yong-Jun Yang) 신영어영문학회 2010 신영어영문학 Vol.47 No.-

The purpose of this paper is to analyze and compare English and Korean aspects, especially the difference and meaning the English Progressive aspect and the Korean Progressive aspect semantically. The marker of English Progressive aspect is ‘be+~ing’, those of Korean Progressive aspect are ‘-go iss-’, ‘-eo ga-’, ‘-eo o-’. There are many kinds of aspectual markers in Korean Progressive aspect. The usages of English Progressive aspect are progressive action, limited time duration, iterative, and imperfective. However, those usages of Korean Progressive aspect are continuative, limited continuative, incompletion, special habituative, descriptive action, and politeness. There are aspects as well as tense in English and Korean. In the future, aspect has to be taught one grammatical part in English and Korean. Clearly, aspect is different from tense.

간접화행과 대화함축의 비교·분석

양용준(Yang, Yong-Jun) 미래영어영문학회 2003 영어영문학 Vol.- No.9