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Development of Voxel Based Machining Shape Simulator
Keiichi Shirase,Tomoyuki Kouno,Keiichi Nakamoto (사)한국CDE학회 2010 한국CAD/CAM학회 국제학술발표 논문집 Vol.2010 No.8
In this study, voxel model representation is applied for a geometric machining shape simulator. A voxel model generally requires a huge amount of memory for shape representation, therefore the multilayer Octree structure of voxels is utilized to reduce the memory usage and improve the accuracy for the complicated shape representation of three-dimensional objects. Based on actual tool paths, case studies of machining shape simulation were carried out to examine the relation between the Octree layer levels with calculation time and memory usage. Furthermore, the ability to simulate machining shapes for both 3-axis and 5-axis milling operation were verified.
Examining the Usage of Ought to in Movie Scripts
Keiichi Eto 영상영어교육학회 2011 영상영어교육 (STEM journal) Vol.12 No.2
This paper investigates how ought to is used in the movies Rocky III (1982), The Parent Trap (1998), Days of Thunder (1990), and some others. Discussions of should/ought to distinction (e.g., Coates, 1983; Myhill, 1997; Palmer, 1990; Westney, 1995) typically center around two issues: deonticity vs. epistemicity, and degree of subjectivity. Using the data, this paper argues for the need to recognize a third: emotionality. As a step toward enriching our understanding of ought to, this study provides a general description of how the target modal has been interpreted in previous studies. Many scholars claim that ought to is an equivalent to should and that there is hardly any difference in meaning between the modal verbs. As an instance of this, previous theories assert that both of the two modals carry the 'sense of obligation' and thus are semantically interchangeable in tag questions. It should be pointed out, however, that in this case grammar overrides meaning. As Bolinger (1977) points out, different forms have different meanings and this applies to the distinction between the two modals. The movie dialogs that have been used in this study are taken from the English movie caption database, which contains 801 million words from 978 English films. They help illustrate the characteristic of the semi-modal shown in the speaker's expression. Based on the discussion, this paper suggests that when teaching ought to the trait of the modal should be introduced in a pre-presentation stage and then should be engaged in output practice, thus exposing learners to input and output activities.
Virtual Reality-Based Lathe Operation Training and its Brain Function Assessment
Keiichi Watanuki 한국생산제조학회 2012 한국생산제조시스템학회 학술발표대회 논문집 Vol.2012 No.10
In the present paper, we describe the measurement of brain activation response during lathe operation training in a VR lathe environment and an actual lathe environment by near-infrared spectroscopy. In the frontal lobes and the motor cortex, oxyHb tended to increase during the operation training in both the VR lathe environment and the actual lathe environment. The results show that the brain activation response during the performance of lathe operation in the VR lathe environment was very similar to that which occurs during lathe operation in the actual lathe environment.