Akitake Makinouchi

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Ever since Julius Wolff proposed the law of bone transformation in the 19th century, it has been widely known that the trabecular structure of cancellous bone adapts functionally to the loading environment. To understand the mechanism of Wolff's law, a three-dimensional (3D) computer simulation of trabecular structural changes due to surface remodeling was(More)
OBJECTIVE To elucidate the differences in temporal processing between positive and negative facial expressions by using event-related potentials (ERPs) with spatially filtered images. METHODS Based on the traits of parallel visual pathways, four types of facial expression images (happiness, fear, anger and neutral) with low, high and broadband spatial(More)
Physiological morphometry is a critical factor in the flow dynamics in small airways. In this study, we visualized and analyzed the three-dimensional structure of the small airways without dehydration and fixation. We developed a two-step method to visualize small airways in detail by staining the lung tissue with a radiopaque solution and then visualizing(More)
Airway compliance is a key factor in understanding lung mechanics and is used as a clinical diagnostic index. Understanding such mechanics in small airways physiologically and clinically is critical. We have determined the "morphometric change" and "localized compliance" of small airways under "near"-physiological conditions; namely, the airways were(More)
Tube Hydroforming (THF) is getting an increasing amount of attention in industry. THF has advantages such as weight reduction, high dimensional accuracy, and high rigidity. However, this forming process requires precise control of internal pressure and axial feeding. Additionally, in most cases prebending processes must be performed on the tubes before the(More)
A three-dimensional (3D) internal structure observation system based on serial sectioning was developed from an ultrasonic elliptical vibration cutting device and an optical microscope combined with a high-precision positioning device. For bearing steel samples, the cutting device created mirrored surfaces suitable for optical metallography, even for(More)
In this paper, we propose a novel shape and physical attribute handling system Volume-CAD designated for practical and robust use in the manufacturing process of various industries. The internal data structure ‘Kitta Cube’ is formalized by CW-complexes. Complex is a structure consisting of different dimensional items with consistency (without gap or(More)
In this study, the effect of tool-modeling accuracy on a finite-element simulation of a square-cup deep-drawing process is examined. First, the accuracy of tool modeling using a conventional approach, in which polyhedral surfaces are used, is compared with that of an alternative approach, in which the quadratic parametric surfaces proposed by Nagata(More)
With the transition of the most fundamental data in manufacturing from drawings to three-dimensional (3D) CAD (Computer Aided Design) data, we are now able to fabricate products with beautiful curved surfaces, for example, automobiles, cellular phones, etc. However, current 3D CAD involves only shape data, which consequently poses certain difficulties in(More)
A new algorithm of using finite element simulation coupled with voxel approach on creating the tools mesh is applied to simulate the stamping of one rail proposed by Digital Die Design3DS Program. This rail underlines the springback which causes essential difficulties in the die design process, particularly because of the high shape accuracy demanded for an(More)