Hiroshima, Japan
Hiroshima, Japan

Hiroshima City University is a public university at Hiroshima, Hiroshima, Japan, founded in 1994, educating both undergraduates and graduate students. HCU is especially distinctive for its Peace Studies program, in line with Hiroshima's status as an international city of peace. Wikipedia.


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Kamada S.,Hiroshima City University | Ichimura T.,Prefectural University of Hiroshima
IEEE Region 10 Annual International Conference, Proceedings/TENCON | Year: 2017

Deep Belief Network (DBN) has a deep architecture that represents multiple features of input patterns hierarchically with the pre-trained Restricted Boltzmann Machines (RBM). A traditional RBM or DBN model cannot change its network structure during the learning phase. Our proposed adaptive learning method can discover the optimal number of hidden neurons and weights and/or layers according to the input space. The model is an important method to take account of the computational cost and the model stability. The regularities to hold the sparse structure of network is considerable problem, since the extraction of explicit knowledge from the trained network should be required. In our previous research, we have developed the hybrid method of adaptive structural learning method of RBM and Learning Forgetting method to the trained RBM. In this paper, we propose the adaptive learning method of DBN that can determine the optimal number of layers during the learning. We evaluated our proposed model on some benchmark data sets. © 2016 IEEE.


Patent
Japan National Institute of Advanced Industrial Science, Technology, Kagoshima University and Hiroshima City University | Date: 2013-06-28

A high-density shape reconstruction is conducted in measuring animal bodies as well. An image processing system has a projection device, an imaging device, and an image processing apparatus connected to the projection device and the imaging device, wherein the projection device projects a projected pattern to an observation target, the imaging device captures the projected pattern, and the image processing apparatus performs shape reconstruction based on an input image including the projected pattern. The image processing apparatus includes a unit for fetching the input image captured by the imaging device and performing line detection for the projected pattern projected by the projection device, wherein the projected pattern is a grid pattern formed of wave lines; and a unit for performing shape reconstruction by associating intersection points of vertical and horizontal lines extracted by the line detection with the projected pattern.


Patent
Japan National Institute of Advanced Industrial Science, Technology, Kagoshima University and Hiroshima City University | Date: 2015-06-10

A high-density shape reconstruction is conducted in measuring animal bodies as well. An image processing system has a projection device, an imaging device, and an image processing apparatus connected to the projection device and the imaging device, wherein the projection device projects a projected pattern to an observation target, the imaging device captures the projected pattern, and the image processing apparatus performs shape reconstruction based on an input image including the projected pattern. The image processing apparatus includes a unit for fetching the input image captured by the imaging device and performing line detection for the projected pattern projected by the projection device, wherein the projected pattern is a grid pattern formed of wave lines; and a unit for performing shape reconstruction by associating intersection points of vertical and horizontal lines extracted by the line detection with the projected pattern.


Patent
Sharp Corporation and Hiroshima City University | Date: 2014-11-17

There is provided a medical device whose occupied space is reduced. According to an aspect of the present invention, a medical device (1) adjusts a position of a medical instrument including a rod-like insertion unit (201) for being inserted into a body. The medical device includes an ultrasonic actuator that holds the insertion unit of the medical instrument, and that displaces or rotates the insertion unit with respect to the ultrasonic actuator, and an actuator fixing unit (101 and 102) that fixes a position of the ultrasonic actuator to a surgical site.


Patent
Sharp Corporation and Hiroshima City University | Date: 2014-09-10

An expansible elastic tube (1) in which gas is encapsulated, a medical instrument (an endoscopic camera 2) secured to the tip of the elastic tube (1), a non-expansive tube (3) that is connected to the other end of the elastic tube (1) in such a way as to communicate therewith, the non-expansive tube (3) in which gas is encapsulated, an inextensible body (4) having flexibility, the inextensible body (4) fixed to the elastic tube (1) in a longitudinal direction, a connecting tube (5) having the shape of a hollow circular cylinder and having flexibility and a non-expansive property, the connecting tube (5) connected to the non-expansive tube (3), and a control device (20) which performs variable control of the air pressure inside the elastic tube (1) are provided, and the air pressure is controlled by the control device (20), whereby the elastic tube (1) is made to expand and contract on the side opposite to the inextensible body (4) and the elastic tube (1) is curved at an arbitrary angle.


Ahn C.-J.,Hiroshima City University
Digital Signal Processing: A Review Journal | Year: 2010

In MIMO systems, channel estimation is important to distinguish the transmitted signals from multiple transmit antennas. When MIMO systems are introduced in cellular systems, we have to measure the received power from all the connectable base station (BS), as well as to distinguish all the channel state information (CSI) for the combination of transmitter and receiver antenna elements. One of the most typical channel estimation schemes for MIMO in a cellular system is to employ a code division multiplexing (CDM) scheme in which a unique spreading code is assigned to distinguish both BS and MS antenna elements. However, by increasing the number of transmit antenna elements, large spreading codes and pilot symbols are required to estimate an accurate CSI. To reduce this problem, in this paper, we propose a high time resolution carrier interferometry (HTRCI) for MIMO/OFDM to achieve an accurate CSI without increasing the number of pilot symbols. © 2010 Elsevier Inc. All rights reserved.


Kakuda Y.,Hiroshima City University
Proceedings - Symposia and Workshops on Ubiquitous, Autonomic and Trusted Computing in Conjunction with the UIC 2010 and ATC 2010 Conferences, UIC-ATC 2010 | Year: 2010

Assurance network technologies are necessary to realize trustable terminal/infrastructure service applications for new generation networks. This invited paper outlines our project of research titled "Fundamental Concepts of Assurance Network Technologies and Their Case Studies" and shows concepts and technologies of assurance networks and case studies for mobile ad hoc networks. © 2010 IEEE.


Kojima A.,Hiroshima City University
FPT 2013 - Proceedings of the 2013 International Conference on Field Programmable Technology | Year: 2013

Blokus Duo is a board game for two players, which uses 21 different shapes of tiles and 14×14 board. We implement Blokus Duo player design on FPGA by using hardware-software co-design method. In this paper, we describe the structure and the algorithm which are used in our Blokus Duo player design. It uses alpha-beta pruning and iterative deepening depth-first search by software and evaluation function by hardware in the current version. The hardware-software co-design implementation is about seven times faster than the original software code. © 2013 IEEE.


Okubo H.,Hiroshima City University
American journal of physiology. Gastrointestinal and liver physiology | Year: 2015

Several lines of evidence have suggested a role of gut microbiota in the etiology of nonalcoholic steatohepatitis (NASH). NASH subjects reportedly showed a prolonged orocecal transit time coexistent with small intestinal bacterial overgrowth. We considered the possibility that enhanced gastrointestinal motility would influence gut microbiota and thus investigated the effects of the gastroprokinetic agent mosapride citrate (MC) on gut microbiota and the development of NASH using a methionine-choline deficient (MCD) diet-fed rodent model. Mice were divided into three groups, given the normal chow diet (NCD), the MCD diet, or the MCD diet containing 10 mg·kg(-1)·day(-1) of MC (MCD plus MC) for 6 wk. NASH development was evaluated based on hepatic histochemical findings, serum parameters and various mRNA and/or protein expression levels. MC treatment suppressed MCD diet-induced NASH development, with reduced serum lipopolysaccharide and increased plasma glucagon-like peptide-1 (GLP-1) concentrations. Calculation of the relative abundance of each strain based on gut microbiota analyses indicated lactic acid bacteria specifically, such as Bifidobacterium and Lactobacillus, in feces to be decreased in the MCD, compared with the NCD group. Interestingly, the reduction in lactic acid bacteria in the MCD diet group was reversed in the MCD plus MC group. In addition, colon inflammation observed in the MCD diet group was reduced in the MCD plus MC group. Therefore, MC showed a protective effect against MCD diet-induced NASH development in our rodent model, with possible involvements of increased fecal lactic acid bacteria, protection against colon inflammation and elevated plasma GLP-1. Copyright © 2015 the American Physiological Society.


Mimura K.,Hiroshima City University
Journal of the Physical Society of Japan | Year: 2011

A lossy compression algorithm for binary redundant memoryless sources is presented. The proposed scheme is based on sparse graph codes. By introducing a nonlinear function, redundant memoryless sequences can be compressed. We propose a linear complexity compressor based on the extended belief propagation, into which an inertia term is heuristically introduced, and show that it has near-optimal performance for moderate block lengths. © 2011 The Physical Society of Japan.

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