Effects of Cooling Rate on the Microstructure and Tensile Properties of Wire-Arc Additive Manufactured Ti–6Al–4V Alloy

Hui‑Jun Yi,Jin‑Woo Kim,Young‑Lak Kim,Sangyong Shin 대한금속·재료학회 2020 METALS AND MATERIALS International Vol.26 No.8

Wire-arc additive manufacturing has emerged as a technology that could replace the conventional manufacturing processof titanium alloys. However, it produces a coarse β grain, which can accumulate via several deposited materials, resulting isstrong texture and anisotropy. To investigate potential solutions, the effects of the cooling rate on the resulting microstructureand tensile properties were studied. The cooling rate of the deposited materials was adjusted by interpass temperaturecontrol. Under rapid cooling, fine α + α′ grain with a low aspect ratio were observed and tensile and hardness propertieswere also improved.

張戒論杜

張駿?(Zhang Jun?hui) 동아인문학회 2010 동아인문학 Vol.18 No.-

Zhang Jie’s Comment on Poetry in Suihantang in South Song Dynasty is an important work in the Chinese aesthetics history and Chinese poetry comment history. Understanding and discussion Du Fu’s poetry is not only an important element of this work, but also an important part of aesthetics; especially the volume 2 was specialized in commenting on Du Fu’s poem. This suggested that Zhang Jie took Du Fu as a model and respected and followed him, and this is the implementation of Zhang Jie’s theory in the critical practice.

월악산 잣나무 및 화백나무 형성층의 계절적 활동과 적산온도와의 관계

박준희, 강현정, 이해진, 서정욱 충북대학교 농업과학기술연구소 2022 農業科學硏究 Vol.38 No.2

The current study was conducted to investigate (1) the duration of cambial activity and (2) the effect of degree days on the initiation of cambial activity of the Pinus koraiensis (PK) and Chamaecy- paris picifera (CP) planted in Mt. Worak. In addition, the differences of the seasonal cambial activities according to the diameter were also investigated using C. picifera with a diameter of 30 cm (CPL) and 15 cm (CPS), which were planted in the same year. The cambium samples were weekly collected using a mini-borer (Ø 2 mm), so called Traphor, between April and October in 2017. The results obtained are as follow. The initiation of the cambial activity of CP (April 21-28) were slightly earlier than PK (April 21). The species with the longest cambial activity was CPS (147.2±12.1 days), followed by PK (141.6±9.8 days) and CPL (139±12.1 days). The degree days inducing the initiation of the cambial activ- ity for PK and CP were 180.5 and 180.5-242.8, respectively.

객체지향 설계 방법론에 대한 비교분석

이준휘 대불대학교 1996 論文集 Vol.2 No.2

In this paper, we compare module based on structural stratagy with module of object oriented concept. Through investigation of object oriented module design, object oriented solution method could give aid to the method to solve the new problem which is nearly thought of human being than that of existing structural concepts. Thus using the object modeling application and utilization could more and approach to object oriented design.

生産性의 本質에 關한 硏究 : 그 分析과 成果分配를 中心으로

李義俊 대구 효성가톨릭대학교 1968 연구논문집 Vol.1968 No.3

초등학생의 무용학습과 감성지능(EQ) 발달의 관계

박준희 한국스포츠리서치 2003 한국 스포츠 리서치 Vol.14 No.4

This research aimed to determine what effects the dancing learning of primary school students had on the development of their emotion quotient. Thus, in surveying their EQ, the research polled 293 primary school students who enrolled with private dancing institutes in Gwangju City and South Jeolla Province. It came out with the following conclusion. First, the EQ of primary school students who participated in dancing learning was normal. Also, of lower variables, the ability to express emotion was low, while abilities of emotion recognition, emotion control, empathy and emotion utilization were normal. Second, of primary school students participating in dancing learning, compared to high graders, low graders had high-level abilities of emotion recognition, while high graders had high-level abilities of emotion utilization and emotion expression. Third, the ballet-learning group had high-level abilities of emotion control and emotion recognition, while the Korean dancing-learning group had a high-level ability of empathy. Compared to those with no experience in winning prizes in dancing contests, prize-winners had higher-level abilities of emotion control, empathy, emotion utilization, and emotion expression. Particularly, earnest learners had a higher-level ability of emotion utilization than those who participated in dancing without enthusiasm. Fourth, participation types of dancing learning had effects on empathy, and participation attitude of dancing learning had effects on emotion utilization. Also, an experience in winning prizes in dancing contests had negative effects on emotion expression and empathy abilities, but positive effects on emotion control and emotion utilization abilities

상완골 근위부 골절 치료에서 잠김 압박 금속판의 유용성

김동휘,이준영,조승환,양훈,하상호 朝鮮大學校 附設 醫學硏究所 2009 The Medical Journal of Chosun University Vol.34 No.1

Purpose: To prove the efficacy of locking compression plate (LCP) in proximal humerus fracture. Materials and Methods: Forty four out of 48 patients who had proximal humerus fracture operation with LCP from November, 2004 to June, 2008 and available for follow up for more than 6 months were evaluated. Eighteen cases were male and 26 cases were female with mean age of 56 years (range 29-85 years). Cause of injury was traffic accident in 17 cases, slip down in 20 cases and fall down in 7 cases. Mean interval from injury to operation was 6.8 days (range 2-30 days) and mean operation time was 80. 5 minutes(range 40-130 minutes). Open reduction and internal fixation with LCP using deltopectoral approach was used in all cases. Postoperative clinical evaluation was done using Constant-Murley assessment and bone union and neck-shaft angle was checked using radiographic exam. Results: Bone union was achieved in 41 out of 44 cases at mean interval of 11.2 weeks(range 6-16 weeks). Mean neck-shaft angle was 129.7 degree (range 101-146) with more than 20 degree of angular deformation in 2 cases. For the complication, 2 cases of temporary axillary nerve injury, 1 case of nonunion, 2 case of delayed unions with angulation, 2 case of ankylosis was observed. Conclusion: LCP can prevent reduction loss and minimize soft tissue injury which result in firm fixation and early immobilization. It seem to be very efficient in treating proximal humerus fracture in elderly.

"五四"何以失精神

劉慧軍 한국중국문화학회 2000 中國學論叢 Vol.9 No.-

5·4운동은 중국 역사상 위대한 사상변혁운동이다. 5·4운동이 제창한 "立人"사상은 당시뿐만 아니라 현재에 있어서도 중국문화의 발전과 변화에 중요한 의의를 지니고 있다. 그러나 여러 가지 원인 때문에 5·4정신은 잊혀졌다. 본고는 정치와 문화적 측면에서 5·4정신이 잊혀지게 된 원인을 검토한 바, 다음 3가지가 주된 원인으로 작용하였다고 분석하였다. 첫째, 중국전통문화의 뿌리가 확고하여 민주사상이 단시간 내에 확립될 수 없었다. 둘째, 정치의 막강한 흡인력이 신문화운동 발전에 영향을 미쳐 지식인이 문화적 사고를 포기하여, 중국의 사상계몽이 시작되자마자 중단되었다. 셋째, 5·4운동 후 권력자의 남용이 5·4정신을 잊혀지게 하는 중요한 원인이 되었다.

마우스에서 자외선조사에 의한 피부주름형성에 대한 생약추출물의 억제효과

구성근, 배부희, 허진주, 미가, 강봉수, 김준형, 남상윤, 윤영원, 김종수, 이범준 충북대학교 동물의학연구소 2008 Journal of Biomedical and Translational Research Vol.9 No.3

본문참고

GPR41 효능제의 3T3-L1 지방세포 지질축적 억제효과

이미지, 이도형, 조준환, 한주희, 명창선 충남대학교 약학대학 의약품개발연구소 2021 藥學論文集 Vol.36 No.-

G protein-coupled receptor 41 (GPR41) is activated by short chain fatty acids (SCFAs) such as acetate (C2), propionate (C3), butyrate (C4). It is known to stimulate the secretion of glucagon-like peptide-1(GLP-1) in the intestinal enteroendocrine L-cell and leptin in adipocytes. The aim of this study was to investigate the inhibitory effect of GPR41 agonists including AR420626, 1-methyl cyclo- propane-1-carboxylic acid (1-MCPC) and propionate on lipid accumulation in 3T3-L1 adipocytes. GPR41 agonists did not show cytotoxic effect at all concentration tested. Each GPR41 agonist reduced lipid ac- cumulation in 3T3-L1 adipocytes. They decreased the expression of peroxisome proliferator-activated re- ceptor-g (PPAR-g) that contributes to the regulation of lipid accumulation. Among three agonists, AR420626 showed the greater effect on the regulation of lipid accumulation than 1-MCPC and propionate. Therefore, this observation indicates the beneficial effect of GPR41 activation for the man- agement of obesity.