Fukuoka Institute of Technology

www.fit.ac.jp
Fukuoka, Japan

Fukuoka Institute of Technology is a private university in East District of Fukuoka city, Fukuoka Prefecture, Japan. The predecessor of the school was founded in 1954, and it was chartered as a university in 1963. It is located near Fukkōdaimae Station. Wikipedia.

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Katayama R.,Fukuoka Institute of Technology
Proceedings of SPIE - The International Society for Optical Engineering | Year: 2016

In microholographic recording, expensive laser diodes having no spectrum broadening (single mode) and no wavelength variation are used. On the other hand, in conventional optical disk systems, cheap laser diodes having spectrum broadening (multimode) and wavelength variation are used. It is a great advantage if the laser diodes for conventional optical disk systems can be used for microholographic recording. Therefore, the effect of wavelength change in microholographic recording was investigated through a numerical simulation. The laser diodes were modeled so that the full width at 1/e2 maximum of the spectrum was 0.8 nm and the center wavelength was 405 nm. The numerical aperture of the objective lenses was 0.85 and the thickness of the recording medium was 300 μm. The diffraction efficiency of the diffracted beam from a microhologram was calculated using the coupled wave theory and the following results were obtained. The diffraction efficiency decreased by three orders of magnitude by replacing single-mode laser diodes with multimode laser diodes, which makes it necessary to enhance the readout signal. The tolerance of the optical path length difference between the signal and reference beams was -50 ∼ 110 μm, which makes it necessary to adjust the optical path length difference. The tolerance of the wavelength variation was 405 ± 0.5 nm, which makes it necessary to select the laser diodes. The conclusion was that it is not practical to use the laser diodes for conventional optical disk systems for microholographic recording. © 2016 SPIE.


Miyamoto N.,Fukuoka Institute of Technology | Nakato T.,Kyushu Institute of Technology
Israel Journal of Chemistry | Year: 2012

Inorganic layered crystals such as clay minerals, layered niobates, and graphite are exfoliated in solvents to form colloidal dispersions of extremely thin inorganic nanosheets. Recently, the liquid crystal phases of these "nanosheet colloids" have been rediscovered and are attracting interest as new types of inorganic liquid crystals. The huge anisotropy of the mesogenic nanosheets compared to other liquid crystal systems is an important feature of the nanosheet liquid crystals for fundamental studies in the fields of colloid science and soft matter physics. In addition, the rich functionalities intrinsic to inorganic materials open a variety of applications such as smart colloids and composite materials with structural regularity. In this article, the recent progress of the emerging new materials of inorganic nanosheet liquid crystals is reviewed with a focus on the behaviors of each system, alignment by external field, and theoretical aspects. Copyright © 2012 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.


Ghoroku K.,Fukuoka Institute of Technology | Nakamura A.,Kagoshima University
Physical Review D - Particles, Fields, Gravitation and Cosmology | Year: 2013

According to the AdS/CFT correspondence, the N=4 supersymmetric Yang-Mills (SYM) theory has been studied by solving the dual supergravity. In solving the bulk Einstein equation, we find that it could be related to the 4D Friedmann equation, which is solved by using the cosmological constant and the energy density of the matter on the boundary, and they are dynamically decoupled from the SYM theory. We call this combination of the bulk Einstein equations and the 4D Friedmann equation as holographic Friedmann equations. Solving the holographic Friedmann equations, it is shown how the 4D decoupled matter and the cosmological constant control the dynamical properties of the SYM theory, quark confinement, chiral symmetry breaking, and baryon stability. From their effect on the SYM, the various kinds of matter are separated to two groups. Our results would give important information in studying the cosmological development of our universe. © 2013 American Physical Society.


Barolli L.,Fukuoka Institute of Technology | Xhafa F.,University of Barcelona
IEEE Transactions on Industrial Electronics | Year: 2011

With the fast growth of the Internet infrastructure and the use of large-scale complex applications in industries, transport, logistics, government, health, and businesses, there is an increasing need to design and deploy multifeatured networking applications. Important features of such applications include the capability to be self-organized, be decentralized, integrate different types of resources (personal computers, laptops, and mobile and sensor devices), and provide global, transparent, and secure access to resources. Moreover, such applications should support not only traditional forms of reliable distributing computing and optimization of resources but also various forms of collaborative activities, such as business, online learning, and social networks in an intelligent and secure environment. In this paper, we present the Juxtapose (JXTA)-Overlay, which is a JXTA-based peer-to-peer (P2P) platform designed with the aim to leverage capabilities of Java, JXTA, and P2P technologies to support distributed and collaborative systems. The platform can be used not only for efficient and reliable distributed computing but also for collaborative activities and ubiquitous computing by integrating in the platform end devices. The design of a user interface as well as security issues are also tackled. We evaluate the proposed system by experimental study and show its usefulness for massive processing computations and e-learning applications. © 2010 IEEE.


Iwata H.,Fukuoka Institute of Technology | Okada K.,Kyoto University
Ecological Economics | Year: 2011

This paper examines the effects of environmental performance on financial performance using the data of Japanese manufacturing firms from 2004 to 2008. As the environmental performance, our study considers the two different environmental issues of waste and greenhouse gas emissions in capturing the effects of corporate environmental management on financial performance. In addition, to clarify how each financial performance responds to a firm's effort in dealing with different environmental issues, we utilize many financial performance indices reflecting various market evaluations. Our estimation results show the different effects of each environmental performance on financial performance. Waste emissions do not generally have significant effects on financial performance. On the other hand, greenhouse gas reduction leads to an increase in financial performance in the whole sample and clean industries, although it does not have significant effects on financial performance in dirty industries. Furthermore, as the firm growth rate increases, the partial effects of waste emissions on financial performance decrease, whereas the partial effects of greenhouse gas emissions on financial performance increase. © 2011 Elsevier B.V.


Yamauchi H.,Fukuoka Institute of Technology
IEEE Transactions on Very Large Scale Integration (VLSI) Systems | Year: 2010

This paper compares area scaling capabilities of many kinds of SRAM margin-assist solutions for VT variability issues, which are based on various efforts by not only the cell topology changes from 6T to 8T and 10T but also incorporation of multiple voltage supply for cell terminal biasing and timing sequence controls of read and write. The various SRAM solutions are analyzed in light of an impact on the required area overhead for each design solution given by ever-increasing VT random variation σ VT, resulting in a slowdown in the SRAM scaling pace. In order to predict the area scaling trends among various SRAM solutions, two different σ VT -increasing scenarios of being pessimistic and optimistic are assumed, where σ VT becomes>130 mV and suppressed to <70 mV at the 15-nm process node, respectively. As a result, it has been shown that the 6T SRAM cell will be allowed long reign, even in the 15-nm process node, if σ VT can be suppressed to < 70 mV thanks to effective oxide thickness scaling for the low-standby-power process; otherwise, 10T and 8T with readmodifywrite will be needed after σ VT becomes >85 and 75 mV, respectively. © 2006 IEEE.


Yamamoto N.,Fukuoka Institute of Technology
Proceedings - 2015 18th International Conference on Network-Based Information Systems, NBiS 2015 | Year: 2015

In our previous work, it has been shown that the students can improve the learning process by using smartphones. For the professors of the university, it is difficult to offer all necessary information to the students. In addition, they cannot provide the information to satisfy all students because the quantity of knowledge of each student attending a lecture is different. Therefore, for the lectures of a higher level than intermediate level, the students should study the learning materials by themselves. In the previous work, we presented an interactive learning process in order to improve the students learning motivation and the self-learning time. Also, to improve the progress speed of a lecture, we proposed an Active Learning System (ALS). In this paper, to improve student's self-learning procedure, we propose some new functions for ALS. © 2015 IEEE.


Fukumoto M.,Fukuoka Institute of Technology
Proceedings - 2014 IIAI 3rd International Conference on Advanced Applied Informatics, IIAI-AAI 2014 | Year: 2014

Music chord progression is one of musical elements that compose music piece. The music chord progression can be created freely by a user, however, combination of music chords is innumerable to define the progression. To resolve this problem, chord progression theory and basic patterns are often used. However, with these methods, it is hard for general users to create a music progression suited for each user's feelings. In order to create the chord progression suited for the user's feelings, user's own basic music knowledge and experience are required. In our previous study, we have proposed Interactive Genetic Algorithm (IGA) that creates music chord progression. In the IGA, Genetic Algorithm was used as evolutionary algorithm. In this study, through two listening experiments, we investigated the efficacy of the proposed IGA creating music chord progression. As the experiments, searching and evaluating experiments were conducted. As targets of creation of the chord progression, 'bright' and 'dark' chord progressions were selected as experimental conditions. In the result of the searching experiment, significant increases of fitness value were observed in both of the conditions. In the results of the evaluating experiment, in the 13th generation, large difference in impression between the conditions was observed. © 2014 IEEE.


Patent
UD Trucks Corporation and Fukuoka Institute of Technology | Date: 2013-01-16

A distance sensor detects a target distance from a vehicle to a target in front of the vehicle, and a vehicle speed sensor detects a vehicle speed. A controller calculates a stopping distance of the vehicle from the vehicle speed. The controller calculates a collision possibility index from the target distance and the stopping distance, and calculates a kinetic energy of the vehicle immediately before a collision with the target from the vehicle speed and the target distance. The controller warns a driver of the vehicle of the possibility of a collision and the scale of damage to be caused by the collision on the basis of the collision possibility index and the kinetic energy of the vehicle immediately before the collision. As a result, the driver is provided with information promoting safe driving which appeals to the driver forcefully.


Patent
Fukuoka Institute of Technology and Ud Trucks Corporation | Date: 2011-03-09

A distance sensor detects a target distance from a vehicle to a target in front of the vehicle, and a vehicle speed sensor detects a vehicle speed. A controller calculates a stopping distance of the vehicle from the vehicle speed. The controller calculates a collision possibility index from the target distance and the stopping distance, and calculates a kinetic energy of the vehicle immediately before a collision with the target from the vehicle speed and the target distance. The controller warns a driver of the vehicle of the possibility of a collision and the scale of damage to be caused by the collision on the basis of the collision possibility index and the kinetic energy of the vehicle immediately before the collision. As a result, the driver is provided with information promoting safe driving which appeals to the driver forcefully.

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