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허엽,박장평 江原大學校附設體育科學硏究所 1994 江原大學校附設體育科學硏究所論文集 Vol.- No.18
The purpose of this study is to find out if there is any effect of knowledge of results on the motor learning. The subjects of this study were sixty middle school girls using the right hand(aged 15.43± .42). The experimental condition was consisted of quantltive KR during 60trials, qualitative KR offer group, quantltive KR during 1 - 30 trials, qualitative KR offer group during 31 - 60 trials, qualitative KR during 1 - 3Otrials, and quantitive KR offer group during 31 - 60 trials, control group. The task of this experiment was timing task and it was to move four sections(90cm) at the rate of 1800msec. The result of experiment;It was find that there's no differences between the group.
용접실습 교과목에 필수적인 기계제도 기초 이론 학습에 대한 증강현실 콘텐츠 시스템을 활용한 교육 방법 및 효과성
구창대,양형석,이동엽,Koo, Chang-Dae,Yang, Hyeong-Seok,Lee, Dong-Youp 대한용접접합학회 2014 대한용접·접합학회지 Vol.32 No.4
Today, the development of digitized information media and info-communications are bringing many changes. Due to the development of IT thechnology, we can learn wherever, whenever, regardless of time and place. Machine drawing subject is a very important in mechanical engineering course, but it's studyed only basic theory in a short period, average 1~2weeks. So that, students think that the mechanical drawing is of minor importance. Such ideas make them difficult to impove sense of space in isometric drawing and drawing skill. Therefore, in this paper, augmented reality-based contents through the system, Mechanical Drawing of education to meet the effectiveness and satisfaction, student learning can be spontaneously it was construct self-system. And, Theoretical part of the Mechanical Drawing is proposed ensure more efficient and easier training. In this paper, we were test operation for user effectualness of proposed service at Korea Polytechnics Colleges a industrial facilities management in Daegu. Target user are 66 students, and The students were divided into experimental group and comparison group. Experimental results, experimental group was able to do systematically experience many Projection Drawing and Pictorial Drawing in short schooltime. And, The test operation results showed that have the possibility to meet education effectiveness and user satisfaction in this augmented reality-based contents system.
Chang, Moon Jong,Jeong, Hyeon Jang,Kang, Seung-Baik,Chang, Chong Bum,Yoon, Chan,Shin, Joung Youp Elsevier 2018 The Journal of arthroplasty Vol.33 No.12
<P><B>Abstract</B></P> <P><B>Background</B></P> <P>We aimed at determining whether the coronal alignment of lower extremity was related to rotational geometry of distal femur, femoral anteversion, and tibial torsion in patients with knee osteoarthritis.</P> <P><B>Methods</B></P> <P>A total of 422 lower extremities were divided into 3 groups according to the coronal alignment: valgus (n = 31), neutral (n = 78), and varus group (n = 313). Condylar twisting angle was measured to determine rotational geometry of distal femur as the angle between the clinical transepicondylar axis and the posterior condylar line. Femoral anteversion was assessed using the angle between a line intersecting the femoral neck and the posterior condylar line (pFeAV) and the angle between the same line and transepicondylar axis that is not affected by posterior condylar variations (tFeAV). Tibial torsion was evaluated by measuring the angle between the posterior condyles of the proximal tibia and the transmalleolar axis.</P> <P><B>Results</B></P> <P>As the coronal alignment changed from varus to valgus, the condylar twisting angle increased (r = 0.253, <I>P</I> < .001; 6.6° in varus, 7.4° in neutral, and 10.2° in valgus group). Although the pFeAV also increased (r = 0.145, <I>P</I> = .003), the tFeAV did not change significantly (<I>P</I> = .218). Mean tFeAV was 4.3° in varus, 4.7° in neutral, and 6.5° in valgus group. In contrast, as the coronal alignment changed from varus to valgus, the external tibial torsion increased (r = 0.374, <I>P</I> < .001; 22.6° in varus, 26.3° in neutral, and 32.6° in valgus group).</P> <P><B>Conclusion</B></P> <P>The change patterns of the rotational profiles of the lower extremity according to the coronal alignment should be considered in order to obtain satisfactory rotational alignment after TKA.</P>
Physiological changes induced by temperature stress in poplar (Populus alba L.)
( Chang Mi Heo ),( Hyun Jin Song ),( Mi Jin Jeong ),( Ji Yun Min ),( Hak Gon Kim ),( Seon Jeong Sim ),( Ji Youp Lee ),( Young Long Seo ),( Byung Hyun Lee ),( Jae Kyeong Yang ),( Myung Suk Choi ) 한국임학회 2011 산림과학 공동학술대회 논문집 Vol.2011 No.-
궤양성 대장염의 임상경과 진단 첫해의 임상경과에 영향을 미치는 인자 및 5 년간 임상경과의 변화 양상
최창환(Chang Hwan Choi),정혜원(Hae Won Chung),이재훈(Jae Hoon Lee),박정엽(Jeong Youp Park),이현웅(Hyun Woong Lee),박영수(Young Soo Park),김태일(Tae Il Kim),김원호(Won Ho Kim) 대한소화기학회 2001 대한소화기학회지 Vol.38 No.3
Background/Aims: Previous reports on ulcerative colitis in Korea were mostly about clinical features at the time of diagnosis. In this study, we analyzed not only clinical features of Korean patients with ulcerative colitis at the time of diagnosis, but also clinical courses during 5 years after diagnosis. Methods: The yearly sum of monthly symptom scores (annual disease burden index, ADBI), annual symptomatic period, and clinical severity were evaluated during 5 years after diagnosis, and factors affecting the clinical courses during first year were also analyzed. Results: The averages of ADBI, symptomatic period, and the proportion of patients in remission during the first follow-up year were 5.8±4.4, 4.0±3.1 months, and 22.1%, Those were 3.7±4.1, 3.0±3.4 months, and 32.4%, during the fifth year. The average of ADBI during the second year was significantly higher in patients with high ADBI (>4) during the first year compared with that in patients with low ADBI (6.3±5.5 vs. 2.6±3.8, p<0.01). Conclusions: From these results, we can conclude that the clinical course of ulcerative colitis, assessed by ADBI and symptomatic period, tends to improve with time and the preceding clinical course is significantly correlated to subsequent course. (Korean J Gastroenterol 2001;38: 169-176)
<i>In situ</i> characterization of the field-emission behaviour of individual carbon nanotubes
Kim, Chang-Duk,Jang, Hoon-Sik,Lee, Sung-Youp,Lee, Hyeong-Rag,Roh, Yong-Suk,Rhee, Il-Su,Lee, Eui-Wan,Yang, Hee-Sun,Kim, Do-Hyung IOP Pub 2006 Nanotechnology Vol.17 No.20
<P>The current–voltage (<I>I–V</I>) characteristics of carbon nanotubes (CNTs) during field emission were investigated by <I>in situ</I> imaging and field-emission (FE) measurement inside a field-emission scanning electron microscope (FE-SEM). A primary electron of the FE-SEM could induce and enhance a large stimulated electron emission from a CNT which might be due to the strong local field on the tip of the CNT in the presence of an applied voltage. FE of bent nanotubes (BNTs) can initially occur after they are fully straightened or it can start in the bent state (during geometrical straightening) as the applied field increases. The FE from a single CNT follows FN (Fowler–Nordheim) behaviour with a single linear slope in the FN plot. The FE from two nanotubes with a geometrical change during FE showed transition of the FN slope from the low voltage to the high voltage region, which could be due to interactions between two dynamic neighbouring BNTs.</P>
운전조건 변화가 HCNG 엔진용 삼원촉매 전환효율에 미치는 영향
김창기(Chang-Gi Kim),이성원(Sung-Won Lee),이의형(Ui-Hyung Yi),박철웅(Cheol-Woong Park),이선엽(Sun-Youp Lee),최영(Young Choi),이장희(Jang-Hee Lee) 한국가스학회 2015 한국가스학회지 Vol.19 No.6
이론공연비방식 엔진은 삼원촉매를 이용하여 유해배기가스를 매우 효과적으로 저감시킬 수 있는 장점을 가지고 있다. 삼원촉매는 높은 정화효율을 보이는 공연비범위가 좁기 때문에 엔진에서의 공연비 제어가 매우 중요하다. 본 연구에서는 삼원촉매 성능을 평가하기 위하여 다양한 운전영역에서 삼원촉매의 전환효율을 비교 분석하였다. 최적의 전환효율을 보이는 당량비를 확인하기 위하여 당량비 제어값 변화에 의한 전환효율을 살펴보았다. 실험결과 당량비 제어를 통하여 각 운전조건에서 NMHC, CH4, CO 및 NOx의 전환효율이 95%이상 나타내는 최적 운전조건을 찾을 수 있었다. 동등한 배기가스 온도 조건에서는 출력이 증가할수록 최적당량비가 선형적으로 증가하는 경향을 보였다. Stoichiometric combustion engine with Three-way catalyst had an advantage that can reduce the harmful emissions effectively. Fuel equivalence ratio controlled from engine is very important because Fuel equivalence ratio with high conversion efficiency was narrow. This study analyzed the conversion efficiency under whole range of operating area for to evaluate the performance of three-way catalyst. In order to identify the Optimum conversion efficiency, the conversion efficiency due to change the control value of fuel equivalence ratio was investigated. The result show that conversion efficiency of emissions(more than 95%) has discovered by means of fuel equivalence ratio control at each test condition. As engine power increases, optimal fuel equivalence ratio tended to increase linearly under operating conditions of similar exhaust gas temperature.