Hiroshima, Japan

Hiroshima Institute of Technology is a private university in Saeki, Hiroshima, Japan. It was established by Tsuru Gakuen in 1961 as a two-year college, and became a four-year university in 1963, taking its present name. The university has faculties of engineering, applied information science, and environmental studies. Each has multiple departments.Alumni of Hiroshima Institute of Technology include comedian Yohichi Shimada, Robotics Pioneer Yokomichi Nobukatsu, architect Tōru Murakami, and software entrepreneur Toru Takasuka. Wikipedia.

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Song S.-K.,Hiroshima Institute of Technology
Journal of Environmental Engineering (Japan) | Year: 2017

This Study from the point of view of flood damage reduction and rainwater harvesting was intended to clarify the water use characteristics and the effect of introduced rainwater utilization system in the university lecture building and also was examined the effective rainwater storage tank volume. It was examined the rainwater utilization rate, tap water replacement rate, cost performance and rain stock height of the rainwater usage grey water system from the three years survey. As the results, the amount of annual using water of lecture building from 2011 to 2013 was 16,772-19,269m3/year. The greywater was about 60% of using water in the lecture building, rainwater of the greywater was about 30-40% and the well water was about 60-70% and tap water of greywater was less than 1%. The annual using water for the hand washing-drinking in the lecture building was 38-42% and for the toilet was 35-41% and for the cooling tower was 21-25%, and also the proportion of toilet water in the greywater was about 60%. It was found that lecture building is many used greywater than tap water and the water had been used a lot in the order of the cooling tower and toilet and hand washing. The annual rainwater utilization rate of lecture building was 59-84% and it was high in the order of summer 50-90% and winter 61-95% and interim period 72-97%. It found that more than half of the rainwater collected in each year and in each period was used for the greywater. And the annual tap water replacement rate of rainwater and well water were respectively 28-39% and 60-70%. The annual charge of water and sewerage was reduced by about 40% because the rainwater usage graywater system of lecture building have been used almost 100% of the rain water and well water. The recovery year of the initial cost by reducing the annual water and sewerage charge in consideration of the maintenance inspection cost was about 7.2 years. If only the rain water and tap water was priority use in cooling towers, the recovery of the initial cost was about 17.2 years. The basic rain stock height of lecture building which is rain stock performance was about 56 mm, since the flood control rain stock height and water utilization rain stock height were respectively 20.3mm and 35.4mm. Therefore, it was found that in order to satisfy the basic rain stock height 100mm in lecture building was necessary providing the new storage tank for flood control of about 44mm, or increasing the rainwater storage tank to 2.3 times. Furthermore, according to the results of simulation using the gray water usage data of the lecture building, When the rainwater storage tank be increased to up to 600 m, rainwater utilization rate and tap water replacement rate was respectively increased to about 90% and about 40%. It was found that rainwater utilization rate of university lecture building of long holiday period and irregular water use was smaller than the office building and the rainwater utilization rate was difficult to achieve more than 90%.

Inoue H.,Hiroshima Institute of Technology
IEEE Region 10 Annual International Conference, Proceedings/TENCON | Year: 2017

Recently, deep learning neural networks have been used for practical applications to improve classification accuracy. However, the training time of the deep learning neural networks increases in proportion to the number of layers. On the other hand, the training time of multiple classifier systems (MCS) based on self-generating neural trees extremely quick. In this paper, we propose a novel pruning method for efficient classification for the neural network ensembles and we call this model a self-organizing neural grove (SONG). Experiments have been conducted to compare the pruned MCS with an unpruned MCS, the MCS based on C4.5, and k-nearest neighbor method. The results show that the SONG can improve its classification accuracy as well as reducing the computation cost not only toy problems, but also practical problems. © 2016 IEEE.

Ochi K.,Hiroshima Institute of Technology | Okamoto S.,Japan National Food Research Institute
Chemistry and Biology | Year: 2012

Activation/exploitation of biosynthetic pathways for useful metabolites is a major current interest. The metabolism remodeling approach developed by Craney and colleagues in this issue of (Chemistry & Biology), in which small molecule probes alter the secondary metabolites produced by streptomycetes, could lead to discovery of a multitude of novel antibiotics and other drugs. © 2012 Elsevier Ltd.

Inaoka T.,Japan National Food Research Institute | Ochi K.,Hiroshima Institute of Technology
Journal of Bacteriology | Year: 2012

The rare earth element scandium has weak antibacterial potency. We identified a mutation responsible for a scandium-resistant phenotype in Bacillus subtilis. This mutation was found within the uppS gene, which encodes undecaprenyl pyrophosphate synthase, and designated uppS86 (for the Thr-to-Ile amino acid substitution at residue 86 of undecaprenyl pyrophosphate synthase). The uppS86 mutation also gave rise to increased resistance to bacitracin, which prevents cell wall synthesis by inhibiting the dephosphorylation of undecaprenyl pyrophosphate, in addition to enhanced amylase production. Conversely, overexpression of the wild-type uppS gene resulted in increased susceptibilities to both scandium and bacitracin. Moreover, the mutant lacking undecaprenyl pyrophosphate phosphatase (BcrC) showed increased susceptibility to all rare earth elements tested. These results suggest that the accumulation of undecaprenyl pyrophosphate renders cells more susceptible to rare earth elements. The availability of undecaprenyl pyrophosphate may be an important determinant for susceptibility to rare earth elements, such as scandium. © 2012, American Society for Microbiology.

Ochi K.,Hiroshima Institute of Technology | Hosaka T.,Shinshu University
Applied Microbiology and Biotechnology | Year: 2013

Genome sequencing of Streptomyces, myxobacteria, and fungi showed that although each strain contains genes that encode the enzymes to synthesize a plethora of potential secondary metabolites, only a fraction are expressed during fermentation. Interest has therefore grown in the activation of these cryptic pathways. We review current progress on this topic, describing concepts for activating silent genes, utilization of "natural" mutant-type RNA polymerases and rare earth elements, and the applicability of ribosome engineering to myxobacteria and fungi, the microbial groups known as excellent searching sources, as well as actinomycetes, for secondary metabolites. © 2012 The Author(s).

Tanaka K.,Hiroshima Institute of Technology
Natural Hazards and Earth System Science | Year: 2010

A meteotsunami hit southwest Kyushu on 25 February 2009, with an estimated maximum amplitude of 290 cm, which was higher than that recorded for the 1979 Nagasaki event. This study investigated mesoscale meteorological systems over the East China Sea during the time leading up to the February 2009 event using a Weather Research and Forecast model. The disturbance in the sea-level pressure originated from a gravity wave over southeastern China. The sea-level pressure disturbance observed and modelled over the East China Sea had its source over the southeastern China mountains and was then propagated by a jet stream toward western Japan with the help of both wave-duct and wave-CISK (conditional instability of the second kind) mechanisms. Two synoptic systems supported the momentum convergence and the formation of band-shaped unstable layers in the mid-troposphere. The high-latitude trough extended from eastern Siberia and there was subtropical high pressure over the western Pacific Ocean. The phase speed of the atmospheric wave was as high as 25-30 ms-1, corresponding to the phase speed of long ocean waves on the East China Sea. Improvements in determining the amplitude and timing of the disturbance remain for future work. © 2010 Author(s).

Ebara R.,Hiroshima Institute of Technology
Procedia Engineering | Year: 2010

Corrosion fatigue crack initiation behavior of various kinds of stainless steels is reviewed mainly on the basis of the author's experimental results. The role of corrosion pit in the corrosion fatigue crack initiation process of martensitic, ferritic, austenitic, duplex and precipitation-hardening stainless steels is briefly summarized. The recent investigation of an electrochemical noise measurement method is demonstrated for 12%Cr martensitic stainless steel and 2.5%Mo containing high strength austenitic stainless steels. Finally a couple of future problems to be solved in corrosion fatigue crack initiation are touched on briefly. © 2010 Published by Elsevier Ltd.

Ochi K.,Hiroshima Institute of Technology | Tanaka Y.,Hiroshima Institute of Technology | Tojo S.,Hiroshima Institute of Technology
Journal of Industrial Microbiology and Biotechnology | Year: 2014

Since bacteria were found to contain genes encoding enzymes that synthesize a plethora of potential secondary metabolites, interest has grown in the activation of these cryptic pathways. Homologous and heterologous expression of these cryptic secondary metabolite-biosynthetic genes, often "silent" under ordinary laboratory fermentation conditions, may lead to the discovery of novel secondary metabolites. We review current progress on this topic, describing concepts for activating silent genes. We especially focus on genetic manipulation of transcription and translation, as well as the utilization of rare earth elements as a novel method to activate the silent genes. The possible roles of silent genes in bacterial physiology are also discussed. © 2013 Society for Industrial Microbiology and Biotechnology.

Ebara R.,Hiroshima Institute of Technology
International Journal of Fatigue | Year: 2010

In this paper, fatigue crack initiation and propagation behavior of forging die steels are reviewed mainly on the basis of the author's experimental results. First of all, low cycle fatigue strength, fatigue crack propagation behavior and thermal fatigue properties of the representative hot forging die steel SKD62 are summarized with respect to testing temperature, steel hardness, stress concentration factor of the specimen and surface treatments effect. Then, the emphasis is focused upon the recently obtained experimental results on low cycle, high cycle and giga cycle fatigue behavior of cold forging die steels. Fatigue crack initiation and propagation behavior of cold forging die steels is discussed with respect to steel hardness, surface roughness and stress concentration factor of specimen. Characteristics of fatigue fracture surface morphology is summarized and related to fatigue crack initiation and propagation mechanism of hot and cold forging die steels. Finally, recommended studies on fatigue of forging die steels are touched on briefly. © 2009 Elsevier Ltd. All rights reserved.

Takao S.,Hiroshima Institute of Technology
Kansenshōgaku zasshi. The Journal of the Japanese Association for Infectious Diseases | Year: 2011

Luminex xTAG respiratory viral panel FAST (RVP FAST) assay detects 17 human respiratory virus strains per measurement. Studying RVP FAST efficacy in detecting respiratory viruses in 67 aspirate samples from the nasal cavities of children with acute respiratory infection, we compared RVP FAST results to those of conventional nucleic acid amplification tests (NAT), e.g., real-time PCR, targeting 8 strains. RVP FAST assay detected 13 strains (98 isolates) in 59 of 67 samples. Of these, 8--influenza virus (Inf.V)-AH1, Inf. V-AH3, novel Inf.V-AH1, and Inf.V-B, and adenovirus, RS virus, metapneumovirus, and bocavirus--were compared to NAT results. RVP FAST showed higher sensitivity (83.3-100%) and specificity (98.2-100%) than NAT. RVP FAST also detected coronavirus (CoV) 229E, OC43, NL63, and HKU1 from 10 virus strain samples and enterovirus and/or rhinovirus from 35. RVP FAST assay thus comprehensively detects clinically important viruses in a single measurement, making RVP FAST assay useful in detecting causative respiratory tract viruses.

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