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인체역학적 비용함수들의 Lifting 자세 예측도 비교
최재호,박우진,정의승 한국경영과학회 1996 한국경영과학회 학술대회논문집 Vol.- No.1
Human posture prediction and motion simulaiton methods try to solve inverse kinematic problems using the optimization technique based on the concept of minimum principle. It is very important to select a cost function which reflects the human motion control mechanism in order to predict human posture accurately. In this study, lifting postures were predicted using the five biomechanical cost functions and compared with real human postures in order to evaluate the predictivities of the cost functions. The result showed that all the biomechanical cost functions used in this study could not predict lifting postures accurately. The cost function which minimizes the sum of joint moments showed the smallest mean prediction error, while the one which minimizes the MUR showed statistically better performance.
Duplex Stainless Steel 에서의 동적재결정현상
최재호 대한금속재료학회(대한금속학회) 1997 대한금속·재료학회지 Vol.35 No.1
The deformation behavior of DSS depends on phase composition controlled by heat treatments. With data from stress relaxation tests the destabilization of dislocation structure is studied. The effect of growth rate of the local instability and strain rate on the shape of flow curve is also discussed.
최재호 한국외국어대학교 영미연구소 2015 영미연구 Vol.34 No.-
A web blog, a popular web-based service, is widely adopted in language learning classrooms due to its support for interactive communication. In general, a web blog is assumed to provide the authentic use of languages and effective and easy communications with others, which may assist language learning. This study examined the effects of web blog activities in English classes. In total, 60 college students participated in the study and were assigned to either the experimental group or the control group. The experimental group used a web blog to assist peer-peer and peer-teacher interactions. To examine the effects of the web blog, surveys on self-regulated learning and out-of-class learning activities, and a test of English achievement were conducted. The results of the study revealed that the experimental group showed better performance in locus of control and rehearsal strategies, out-of-class activities, and on the English achievement test than the control group. The study results were presented with implications for teaching and future research, and limitations of the study were noted.
최재호,Choi, Jae-Ho 대한화학회 1966 대한화학회지 Vol.10 No.1
The organic yields (i.e. fraction of nuclear events resulting in organic compound formation) of the radioative neutron capture reactions of halogens in purified bromobenzene have been determined varying extraction time, at $100^{\circ}C$ for thermal effect, varying irradiation time, varying neutron flux and with additional U. V. irradiation. Among the important results are; (1) The organic yields show no remarkable fluctuations with time following neutron irradiation; (2) The organic yields show no change with thermal energy; (3) The organic yields of degassed samples are same in different length of irradiation time whereas the yields of the samples in open air appear to increase with increasing time of irradiation (4) The organic yields increase remarkably with increased neutron flux; (5) The organic yields show a sharp increase by additional U. V. irradiation after neutron irradiation.