http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
질소이온주입에 따른 생체안전성 티타늄 임플란트의 마모특성
변응선,최종운,손선희,정용수 한국산업안전학회 1999 한국안전학회지 Vol.14 No.4
In this study, plasma source ion implantation was used to improve the wear properties of biocompatible titanium implant. In order to observe the effect of ion energy and dose on wear property of titanium implant, pin-on-disk type wear tests in Hank's solution were carried out. The friction coefficient of ion implanted specimens were increased from 0.47 to 0.65 under high energy and ion dose conditions. As increasing ion energy and ion dose, the amount of wear was reduced.
A semi-analytical model for predicting the wear contour in rod rolling process
Byon, S.M.,Kim, S.I.,Lee, Y. Elsevier 2007 Journal of materials processing technology Vol.191 No.1-3
We developed a model which predicts wear contour of grooved roll in the oval-round (or round-oval) pass rolling process. The wear contour is computed by using the linear interpolation of the radius of curvature of an incoming workpiece, that of roll groove and a weighting function which takes into account roll tonnage. The roll wear contour is measured using an in situ roll wear contour reader developed by POSCO. Results show that predicted wear contours are in agreement with those obtained experimentally.
Effect of Post-N+Implantation on the Microstructure of the Interfacial Non-Cubic BN Layers
Byon, Eungsun,Lee, Sunghun,Kim, Jongkuk,Lee, Gunhwan,Han, Seunghee,Lee, Eungjik,Yoon, Jae-Hong,Lee, Sang-Ro 대한금속학회 2002 METALS AND MATERIALS International Vol.8 No.1
Plasma source ion implantation has been applied as a post treatment in order to modify the interfacial sp^2 bonded layer of the cubic BN (cBN) films. The effect of ion irradiation on the microstructure of the noncubic BN layer was investigated. From HRTEM observation, the thickness of the BN layer of the representative sample was about 100 nm including 15 nm of initially grown non-cubic layer at the interface between a substrate and the cubic layer. At optimal plasma source implantation conditions, an acceleration voltage of 50 keV and an ion dose of 2×10 exp(16) ions/㎠, the microstructure of the interfacial non-cubic BN layer was changed. It was noticed that the ion irradiation caused the recrystallization of the amorphous phase and transformed the small crystallites into another phase. The micro-hardness of the complex consisting of a hard and soft layer increased as a result of phase transformations. This was caused by atomic displacements in the initially grown amorphous and hexagonal layers. The atomic displacements calculated by the TAMIX code were in the range of 0.31∼0.52 nm per atom within 70∼100 nm in depth.
Deformation Analysis of Micro-Sized Material Using Strain Gradient Plasticity
Byon S.M.,Lee Young-Seog The Korean Society of Mechanical Engineers 2006 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.20 No.5
To reflect the size effect of material $(1\sim15{\mu}m)$ during plastic deformation of polycrystalline copper, a constitutive equation which includes the strain gradient plasticity theory and intrinsic material length model is coupled with the finite element analysis and applied to plane strain deformation problem. The method of least square has been used to calculate the strain gradient at each element during deformation and the effect of distributed force on the strain gradient is investigated as well. It shows when material size is less than the intrinsic material length $(1.54{\mu}m)$, its deformation behavior is quite different compared with that computed from the conventional plasticity. The generation of strain gradient is greatly suppressed, but it appears again as the material size increases. Results also reveal that the strain gradient leads to deformation hardening. The distributed force plays a role to amplify the strain gradient distribution.
The Korean Speech Act of Refusals:Sociopragmatic Analysis
Andrew Sangpil Byon 한국사회언어학회 2003 사회언어학 Vol.11 No.1
Byon, Andrew Sangpil. 2003. The Korean Speech Act of Refusals: Sociopragmatic Analysis. 사회언어학, 11(1). 외국어 습득에서의 화용론의 역할에 관한 관심이 높아지면서 중간 언어 화용론(jnterlanguage pragmatics)에 관한 연구가 최근 들어 많이 이루어지고 있다. 그러나 영어를 모국어로 하는 KFL 학습자를 대상으로 한 중간 언어 화용론 연구는 매우 미흡한 실정이다. 이에 본고에서는 보다 활발한 한국어 중간 언어 화용론 연구를 위해 먼저 기존의 중간 언어적 화용론 자료 수집 방법론(data-gathering methodology)에 대해 논의하고 한국어를 이용한 written discourse completion task(DCT)를 Brown and Levinson(1987)의 두개의 사회적 변수인 power와 distance에 근거해서 개발하였다. 그 DCT를 이요해서 30명의 한국 대학생과 30명의 영어를 모국어로 하는 한국어 학습자의 한국어 거부 발화 행위를 비교 조사 분석 해 보았다. 그리고 모국어 전의 영향(L1 transfer effect)을 분석하기 위해 30명의 미국 대학생의 영어 거부 발화 행위를 조사하여 한국어 학습자의 결과와도 비교했다. 분석 결과로는, 먼저 12 종류의 거부의 주된 행위 전략(refusal head acts)과, 5종류의 거부 지지 행위 전략(refusal supportive move)을 사용하고 있음을 알아냈으며, 학습자의 한국어 거부 발호 행위에서 나타난 모국어 전이의 영향에 대해 논의했다. 그리고, 사회적 변수가 발호 행위에 미치는 영향을 Sohn(1986)의 수직론(hierarchicalism)과 간접론(indirectness)에 근거해서 한국 대학생과 학습자의 발화 행위를 설명했다. 본고의 결론에서는 이런 연구 결과들을 실제로 한국어 중간 언어 화용론 연구와 외국어로의 한국어 교육에 어떤 식으로 반영시켜야 할 지를 논의했다.
Byon, Jai-II,Park, Sook-Jahr,Park, Kyung-Ahr,Ha, Jeung-Key,Kim, Jeong-Ok,Ha, Yeong-Lae The Korean Society of Food Science and Nutrition 1996 Preventive Nutrition and Food Science Vol.1 No.1
Effects of conjugated linoleic acid(CLA), known as an effective anticarcinogen in several aminal models, on the egg production and egg weight of laying hens, and the weight gains of broilers were investigated. CLA was synthesized from corn oil by the alkaline isomerization method and purified by the low-temperature precipitation method. Diets for laying hens and for broilers were synthesized to meet the specification of their NRC standard rationals. Two separated experiments(Experiment I and II) were conducted for laying hens. in experiment I, 45 hens(300 days of age) were divided into 15 hens per treatment group; each hen was housed in wired cage located in a temperature and humidity-controlled house and adopted to the control diet. One week later, each group was subjected to one the four treatment groups for 5 weeks : control, 1.0% CLA, 2.5% CLA and 5.0% CLA diets. Diet and water were ad libitum. The condition of experiment II was the same as that of experiment I except for the addition of 5% corn oil diet and the extension of feeding period to 7 weeks. Egg production, egg weight and feed intake were recorded every week. Forty-five broilers(10day of age) were adopted to the control diet for a week and then switched to the treatment diets for 5 weeks : control, 1.0% CLA, 2.5% CLA, 5% CLA and 5% corn oil, Body weight and feed intake of broilers were measured every week. Diets supplemented with various amounts of CLA enhanced the egg production and increased the egg weight regardless laying hen's age(150 days or 300 days) as compared to control diet. The most effective diet for the egg production and egg weight of young hens(150 days of age) was found to be 1.0% CLA diet, but relatively higher CLA diet(2.5% CLA) was required for old hens (300 day of age) to obtain similar results as seen in younger hens. All hens treated with CLA ate greater amount of feed than control hens. Broilers treated with various amount of CLA ate less feed as compared to control ones, but the body weight gain was greater than the control broilers. These results indicate that CLA enhanced the egg production and agg weight of laying hens, and increased the body weight gain of broilers with less diet consumption.
Numerical study of a SiC mould subjected to a spark plasma sintering process
Byon, Chan,Li, Ming-Han,Kakegawa, Kazuyuki,Han, Young-Hwan,Lee, Dong-Yeon Elsevier 2015 Scripta materialia Vol.96 No.-
<P>Spark plasma sintering (SPS) is a material processing technique based on the Joule heating of a mould and powder under an electrical pulse or DC current. This study demonstrates the use of silicon carbide (SiC). A finite-element numerical study was performed to predict the temperature and stress distributions during SPS. In addition, it was found experimentally that SPS using SiC exhibits similar behaviour to that with a conventional graphite die.</P>