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Tokyo, Japan

Takushoku University is a private university in Japan. It was founded in 1900 by Duke Taro Katsura . The university is located in Tokyo and has two campuses: the main campus in the Bunkyō district, and a satellite campus in the Hachiōji city. Takushoku University has five faculties: Commerce, Political Science and Economics, Foreign Languages, International Studies, and Engineering.Originally, Takushoku University was named the Taiwan Association School, and was founded to produce graduates to contribute to the development of Taiwan. In 1907, it was renamed as the Oriental Association Vocational School. In 1918, it adopted its present name of Takushoku University. Literally, “Takushoku” means "development and industrialization" as well as "colonization", because Japan had overseas colonies like Taiwan, South Sakhalin, and Korea to industrialize at that time.Takushoku University was responsible for training many of Japanese local and colonial administrators as well as overseas merchants. Several of these people who were also karateka took up administrative positions in the Japan Karate Association when it was founded in 1949. The university's karate club was founded around 1924, and has produced many prominent karate instructors and competitors. The university also has a judo program, which produced a second-place result in a 1967 Japanese collegiate competition. Wikipedia.

Nishita S.,Takushoku University
IEICE Transactions on Information and Systems

The string analysis is a static analysis of dynamically generated strings in a target program, which is applied to check well-formed string construction in web applications. The string analysis constructs a finite state automaton that approximates a set of possible strings generated for a particular string variable at a program location at runtime. A drawback in the string analysis is imprecision in the analysis result, leading to false positives in the well-formedness checkers. To address the imprecision, this paper proposes an improvement technique of the string analysis to make it perform more precise analysis with respect to input validation in web applications. This paper presents the improvement by annotations representing screening of a set of possible strings, and empirical evaluation with experiments of the improved analyzer on real-world web applications. Copyright © 2013 The Institute of Electronics, Information and Communication Engineers. Source

In photometric stereo one of the common problems may be inter-reflections occurring in concave surface parts of the object. They may locally blur the images in shade, resulting in a locally distorted shape. The effects may be more significant with increasing curvature of the concavity. Another problem may be non-Lambertian reflection, in which case shape reconstruction based on the Lambertian reflection may give non-local distortions. A combination of the diffuse and specular reflections called directional diffuse reflection may be typical of the non-Lambertian reflections. In this paper, we present image processing methods of reducing the effects of the two problems. They are described mathematically, and experimental results are given to examine the two methods. [Figure not available: see fulltext.] © 2013 3D Display Research Center and Springer-Verlag Berlin Heidelberg. Source

Ikeda O.,Takushoku University
Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)

A novel method of synthetic shape reconstruction from photometric stereo data combined with the FF-based method is presented, aiming at obtaining more accurate shape. First, a shape is reconstructed from color images using a modified FF-based algorithm. Then, with the shape as initial value, a more accurate shape is synthetically reconstructed based on the Jacobi iterative method. The synthesis is realized as follows: the reconstruction is sequentially made in each of small image subareas, using the depths in the neighboring subareas as boundary values, which is iterated until the overall shape converges. The division to image subareas enables us to synthesize large shapes. © 2010 Springer-Verlag. Source

This article demonstrates the practical applicability of a method of modelling shape memory alloys (SMAs) as actuators. For this study, a pair of SMA wires was installed in an antagonistic manner to form an actuator, and a linear differential equation that describes the behaviour of the actuator's generated force relative to its input voltage was derived for the limited range below the austenite onset temperature. In this range, hysteresis need not be considered, and the proposed SMA actuator can therefore be practically applied in linear control systems, which is significant because large deformations accompanied by hysteresis do not necessarily occur in most vibration control cases. When specific values of the parameters used in the differential equation were identified experimentally, it became clear that one of the parameters was dependent on ambient airflow velocity. The values of this dependent parameter were obtained using an additional SMA wire as a sensor. In these experiments, while the airflow distribution around the SMA wires was varied by changing the rotational speed of the fans in the wind tunnels, an input voltage was conveyed to the SMA actuator circuit, and the generated force was measured. In this way, the parameter dependent on airflow velocity was estimated in real time, and it was validated that the calculated force was consistent with the measured one. © 2016 IOP Publishing Ltd. Source

Ogawa T.,Takushoku University
Proceedings - 2014 International Conference on Computational Science and Computational Intelligence, CSCI 2014

Neural network models extended to higher-dimensional numbers have been studied in recent years. In particular, quaternions have an advantage with respect to the expression of rotation in a three-dimensional space. On the other hand, the problem that estimates the cause of an observed result is called an inverse problem, whose solutions have been studied in various engineering fields. In this study, the quaternion network inversion is proposed as a neural network solution of the inverse problem extended to the quaternion. The simulation of the inverse mapping problem is examined to show the effectiveness of the proposed method. © 2014 IEEE. Source

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