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박근상,여종구 건국대학교 산업기술연구원 2000 건국기술연구논문지 Vol.25 No.-
The purpose of this study is what workers feel cause of work stress and cause of the stress occurs results of various sides. We made up a question for the sake of this study, and research to workers who are engaged in medium industry in the metropolitan areas including Seoul. As the result to analyzing the significance difference between each groups about population statistical character excluding personality. It is not likely to find high difference of each group. But, a result of each groups real difference examination about which population statistical character - kind of job, sex, scholarship etc, - have seen in a cause of work stress. And workers feel a lot of stress factors; in the order responsibility in the role related factor and physical environment factor in job intrinsic factor, career development factor
Al6061 Bulk재에서 압축시험에 의한 상온가공성 분석 및 마찰인자 측정
김국주,박종수,윤존도 경남대학교 신소재연구소 2003 신소재연구 Vol.15 No.2
부피성형(bulk forming)은 가공속도, 소재 회수를 및 가공 후의 조직 미세와 등의 유리한 점이 많아 대량 생산에 적합한 가공 방식이다. 그러나 금형형상과 가공조건들이 적절하지 못할 경우 형상오차 및 연성파괴 등의 성형결함이 발생하게 된다. 이 성형결함 없이 성형될 수 있는 한계를 부피 성형한계(bulk forming limit)라고 하는데, 이것은 가공성(workability)과 의미가 비슷하다. 가공성은 공정종류 금형과 소재사이의 마찰, 변형속도 등에 의해 좌우되므로 예측하기 어렵다. 따라서 본 실험에서는 가공성을 Al6061의 소재에서 가공온도, 마찰 및 변형을 속도에 따른 성형한계도(forming limit diagram)로 작성하여 정량화하고자 하였다. 또 압축시험에서 금형과 소재사이의 마찰효과에 의한 베럴링(barreling) 현상이 생기므로 신빙성 있는 실험결과를 얻기 힘들다. 따라서, 각 마찰조건에서 링 압축시험을 통한 마찰인자를 구해서 압축시험으로 구한 측정웅력을 보정하여 유동웅력(flow stress)을 구하는데 사용하고자 한다. Bulk forming process is widely used for a large plastic deformation in a metal industry, which has a lot of advantages at processing speed, raw material utilization, fine microstructure, etc. But if die shape and process conditions are selected improperly, forming defects can be found due to geometric errors and ductile fracture. Bulk forming limit is defined as it is deformed without these defects which is similar to the workability. Prediction of workability is difficult because of dependence on a type of processes, friction of die and material, deformation rate, etc. Therefore, in this study, forming limit diagram is made depending on forming temperature, friction and strain rate to analyze the workability of A16061 bulk material. Also, it is difficult in measuring of reliable result exactly because the barreling is caused by interfacial friction between die and material at the compression test. So, friction factor is measured at the different friction conditions by ring compression test and then flow stress will be calculated from the measured stress by compression test.
HER2-specific aptide conjugated magneto-nanoclusters for potential breast cancer imaging and therapy
Park, Jinho,Park, Seho,Kim, Sunghyun,Lee, In-Hyun,Saw, Phei Er,Lee, Kwangyeol,Kim, Yong-Chul,Kim, Young-Joon,Farokhzad, Omid C.,Jeong, Yong Yeon,Jon, Sangyong The Royal Society of Chemistry 2013 Journal of materials chemistry. B, Materials for b Vol.1 No.36
Image Recomposition Using Seam Carving and Insertion Considering the Rule of Thirds
Jon-Ha Lee,Kyumok Kim,Jinwon Park,Ji Yeol Park,Seung-Won Jung 대한전자공학회 2016 IEIE Transactions on Smart Processing & Computing Vol.5 No.1
In this paper, we present an algorithm for adjusting the position of a user-specified object considering image aesthetics. Specifically, the user-specified object is positioned according to the rule of thirds by inserting or deleting unimportant seam lines from the image. To find such seam lines, a novel weight map is designed using the spatial and color distances from the object. We also design and analyze two approaches to seam carving and insertion. Experimental results show that the proposed method can be used as an effective semi-automatic image recomposition scheme.
3D field phase-space control in tokamak plasmas
Park, Jong-Kyu,Jeon, YoungMu,In, Yongkyoon,Ahn, Joon-Wook,Nazikian, Raffi,Park, Gunyoung,Kim, Jaehyun,Lee, HyungHo,Ko, WonHa,Kim, Hyun-Seok,Logan, Nikolas C.,Wang, Zhirui,Feibush, Eliot A.,Menard, Jon NATURE PUBLISHING GROUP 2018 NATURE PHYSICS Vol.14 No.12
Designing Vegetables and Fruits for Improved Nutrition and Health – Calcium
Sunghun Park,Ning Hui Cheng,Jon K. Pittman,Kil Sun Yoo,Jungeun Park,Tae-Suk Kang,Chang-Kil Kim,Jeung-Sul Han,Sunggil Kim,Leonard M. Pike,Roberta H. Smith,Bhimanagouda S. Patil,Kendal D. Hirschi 한국원예학회 2006 한국원예학회 기타간행물 Vol.- No.-
이존하 ( Jon-ha Lee ),김규목 ( Kyumok Kim ),박지열 ( Ji Yeol Park ),박진원 ( Jinwon Park ),정승원 ( Seung-won Jung ) 한국정보처리학회 2016 한국정보처리학회 학술대회논문집 Vol.23 No.1
가상·혼합현실은 현재 가장 큰 관심을 받고 있는 연구 분야 중 하나이다. 하지만 아직 가상·혼합현실에 대한 정형화된 표준이 없는 상태에서 여러 가지 가상·혼합현실 기기들이 나오고 있다. 따라서 본 논문에서는 이미 상용화되었거나 곧 상용화 될 기기들에 대한 비교 분석을 수행한다. 그리고 정리한 내용을 토대로 가상·혼합현실 기기들의 동향 및 발전 전망을 살펴본다.