名古屋大学 List of Products and Services

Since the record-breaking hit movie "AVATAR" was released in the winter of 2009, numerous 3D films have been shown as of 2010, marking the arrival of what is now referred to as the "Year of 3D." Various electronics manufacturers have also begun releasing 3D televisions, allowing the general public to enjoy 3D visuals more easily. However, there are concerns about the physical effects of continuously watching 3D images, such as decreased vision, eye strain, headaches, and nausea. The causes of these symptoms vary greatly among individuals and remain insufficiently understood at this time.

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In recent years, three-dimensional imaging has rapidly spread in society, with opportunities for the general public to experience it through 3D movie screenings and the sale of 3D televisions becoming more common. Electronics manufacturers are strengthening their products by focusing on 3D-related features as a highlight of digital devices, anticipating market expansion. Despite this widespread adoption, the effects of stereoscopic vision on human visual function have not yet been fully understood. Considering the safety of three-dimensional imaging, it is extremely important and essential to examine its impact on the human body.

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As research on the boundary element method, I conducted studies on: 1) solving sequential shape optimization problems using the boundary element method, 2) optimal design of coil spring cross-sectional shapes using the boundary element method, and 3) research on adaptive mesh methods in the boundary element method. Additionally, I authored a text for engineering beginners on the boundary element method and finite element method titled "Numerical Methods for Partial Differential Equations," as well as a related text on linear algebra titled "Linear Algebra for Computation." The Trefftz method is a boundary-type analysis method, but it differs in that it uses integral equations without singularities. Therefore, I advanced research on the engineering applications of the Trefftz method, including: 1) proposing a sensitivity analysis method using the Trefftz method, 2) proposing a higher-order design sensitivity analysis method using the Trefftz method, 3) proposing an adaptive mesh method for the Trefftz method, 4) simulating sloshing phenomena on water surfaces using the Trefftz method, and 5) conducting thermal conduction analysis of functionally graded materials using the Trefftz method. I served as a guest editor for a special issue commemorating the 70th anniversary of the Trefftz method in an international journal. Additionally, I authored "Introduction to the Trefftz Method."

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In recent years, the number of traffic accident victims has significantly decreased due to improvements in safety technology by automobile manufacturers and the development of Intelligent Transportation Systems (ITS). On the other hand, the number of injured individuals in traffic accidents is at an all-time high. One of the reasons for this is that while modern transportation systems are well-equipped in terms of infrastructure and facilities, they are still developing in terms of education. Additionally, the lack of awareness of traffic risks among those involved in accidents is also considered a problem. Regarding the current state of traffic safety education, drivers receive high-quality education using driving simulators in a 3D environment at driving schools. In contrast, pedestrians primarily learn through textbooks and are not provided with a favorable learning environment for traffic safety in terms of visibility and engagement. Furthermore, it is generally difficult for individuals to receive high-quality traffic education in a 3D environment on their own. Currently, there are numerous studies and systems that simulate traffic flow and environments. There are also educational software for traffic safety aimed at children using characters, and traffic education systems that provide a sense of three-dimensionality through sequential photographs; however, these, including simulators, are primarily targeted at drivers. None of these systems offer interactive 3D environment education specifically for pedestrians.

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One of the main causes of eye strain during 3D video viewing is identified as the "inconsistency between the accommodation distance of the lens and the convergence focal distance." However, in our past research involving young subjects, we found that the accommodation distance of the lens and the binocular convergence focal distance change in sync during 3D viewing, just as they do in natural vision. In this presentation, we will demonstrate the simultaneous measurement of the accommodation distance of the lens and the binocular convergence focal distance during 3D video viewing, clarifying that they change in sync. Additionally, the 3D video will use the trademark Power 3D(TM) from Olympus Visual Communications, Inc.

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