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The purpose of this study is to discuss the mechanism of brain injury experimentally paying attention to the pressure changes on the surface of a brain agar phantom generated by a cavitation. In this paper, first, an experimental system for performing an simple impact experiment is presented. A simple human head model consists of a skull, cerebrospinal fluid (CSF) and brain tissue, represented by...
Radiation therapy with proton and heavy-ion beams has been better established lately and the patient throughput is increasing. Although the therapy beam is controlled with high accuracy, it is difficult to know the location of distal dose falloff in the body. If real-time monitoring of the location is realized, the treatment quality would be improved. We have developed an electron-tracking Compton...
The purpose of this study is to discuss the mechanism of brain injury experimentally, with respect to the pressure changes on the surface of a brain agar phantom by cavitation. First, an experimental system to perform an impact experiment is presented. We present some images taken by a high-speed camera of the behavior of a simple physical head model with and without the brain agar phantom during...
Images recorded by security camera are often severely degraded due to dirty lens or secular distortion of the recording system. To restore these images, the fully determination of space variant point spread function (PSF) is required. To measure PSF, we have proposed a method using a liquid crystal display, and shown some experimental results to restore the images by a CCD camera with intentionally...
A prototype PC-based system of giving color estimation ability to monochrome security cameras has been developed based on the novel concept. The novel concept can be divided into 3 stages. First, space-variant color filter is put onto the lens of the monochrome security camera. Secondly, when a crime takes place, the camera records suspected person. Finally, just after the crime, characteristics of...
We have already started a project for creating a community security structure spread worldwide that uses individually maintained home computers connected to the Internet. We call this project "the e-JIKEI network project". JIKEI means "Vigilante" in Japanese. The basic concept of the project is that every individual person watches in and around his/her house using cheap cameras...
This paper describes a project for the design and implementation of a community security system using individually maintained home computers that are connected to the Internet. In the initial stage of the project, a preliminary kit has been developed that consists of a commercial camera, free-software and an operation manual. Using the preliminary kit, an experimental security system has been implemented...
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