Kanagawa Environmental Research Center

Kawasaki, Japan

Kanagawa Environmental Research Center

Kawasaki, Japan
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Yokoshima S.,Kanagawa Environmental Research Center | Morihara T.,Ishikawa National College of Technology | Kawai K.,Kumamoto University | Yano T.,Kumamoto University | And 2 more authors.
Proceedings of the INTER-NOISE 2016 - 45th International Congress and Exposition on Noise Control Engineering: Towards a Quieter Future | Year: 2016

The Shinkansen super-express railway system has greatly increased its capacity; however, many residents of areas along the railways have been disturbed by noise and vibration from the trains. To preserve health and the environment, in 1975 the government issued the Environmental Quality Standards for Shinkansen Super-express Railway Noise, under which noise is evaluated by maximum-based metrics. However, more than 40 years have passed since these standards were established, and since then, the use of energy-based metrics has been discussed. To provide basic scientific knowledge for the discussion, we performed a secondary analysis using micro datasets of exposure and community responses associated with Shinkansen railway noise. The data were obtained through seven socio-acoustic surveys conducted separately over the last 20 years in Japan. First, we examined whether or not a maximum-based index shows consistent exposure-response relationships according to frequency of train service. Next, we examined the effects of vibration on the exposure-annoyance relationship associated with Shinkansen railway noise. Finally, we applied logistic regression analysis to the datasets. Adjusting vibration and demographics as confounding factors, we established representative exposure-response relationships. © 2016, German Acoustical Society (DEGA). All rights reserved.


Morihara T.,Ishikawa National College of Technology | Yokoshima S.,Kanagawa Environmental Research Center | Matsumoto Y.,Saitama University
Proceedings of the INTER-NOISE 2016 - 45th International Congress and Exposition on Noise Control Engineering: Towards a Quieter Future | Year: 2016

This experimental study was carried out to examine the combined effects of high-speed (Shinkansen) railway noise and vibrations on activity disturbances. Participants were ten women and ten men (18-22 years) with normal hearing ability. The Shinkansen railway noise and vibrations used as stimuli were recorded near the Hokuriku Shinkansen railway. The audio stimuli had LAmax values of 50, 60, and 70 dB, whereas the vibration stimuli had three types (none, intermediate, and high) of vertical vibrations. The participants were exposed to these combined stimuli while they engaged in 30-second activity tasks (reading and thinking). The results indicated that there were significant differences in subjects' evaluations of vibration cognition between all of the vibration stimuli during the reading task. In contrast, during the thinking task, we observed no differences between the none and intermediate vibration conditions in the 60 and 70 dB conditions. We observed significant differences in evaluations of activity disturbance between the none and high vibration conditions in the 50 and 60 dB conditions during the reading task and between the none and intermediate or high vibration conditions in the 50 dB condition during the thinking task. © 2016, German Acoustical Society (DEGA). All rights reserved.


Yokoshima S.,Kanagawa Environmental Research Center | Morihara T.,Ishikawa National College of Technology | Sato T.,Hokkai Gakuen University | Yano T.,Kumamoto University
International Journal of Environmental Research and Public Health | Year: 2017

The Shinkansen super-express railway system in Japan has greatly increased its capacity and has expanded nationwide. However, many inhabitants in areas along the railways have been disturbed by noise and ground vibration from the trains. Additionally, the Shinkansen railway emits a higher level of ground vibration than conventional railways at the same noise level. These findings imply that building vibrations affect living environments as significantly as the associated noise. Therefore, it is imperative to quantify the effects of noise and vibration exposures on each annoyance under simultaneous exposure. We performed a secondary analysis using individual datasets of exposure and community response associated with Shinkansen railway noise and vibration. The data consisted of six socio-acoustic surveys, which were conducted separately over the last 20 years in Japan. Applying a logistic regression analysis to the datasets, we confirmed the combined effects of vibration/noise exposure on noise/vibration annoyance. Moreover, we proposed a representative relationship between noise and vibration exposures, and the prevalence of each annoyance associated with the Shinkansen railway. © 2017 by the authors. Licensee MDPI, Basel, Switzerland.


Matsuda T.,Daiwa House Industry Central Research Laboratory | Tomita R.,Nihon University | Kotani T.,Fujita Corporation | Yokoshima S.,Kanagawa Environmental Research Center | Izumi Y.,Railway Technical Research Institute
AIJ Journal of Technology and Design | Year: 2017

This research examined measuring method by questionnaire survey with presenting a hypothetical measurement example of vibration induced by traffic vibration in room. Results obtained by the survey were the followings. (1) For the measurement of magnitude of the vibration, basically use of traffic vibration source. However, in order to compare after other buildings and measures, it was found that the input is used together with known vibration source. (2) For the measurement of magnitude of vibration, many respondents select the center of the room and the middle of floor surrounded by large or small beams.


Tomita R.,Nihon University | Kotani T.,Fujita Corporation | Matsuda T.,Daiwa House Industry Central Research Laboratory | Yokoshima S.,Kanagawa Environmental Research Center | Izumi Y.,Railway Technical Research Institute
AIJ Journal of Technology and Design | Year: 2016

This research examined measuring positions by using questionnaire survey with presenting a hypothetical measurement example of vibration induced by human moving in a room. Results obtained by the survey were the followings. (1) For the measurement of magnitude of vibration, many respondents select the center of the room and the middle of floor surrounded by large or small beams unless the positions are identified. (2) For the measurement of the floor resistance against human movement vibration, many respondents select the center of the room, and the middle between the center and each corner of the room.


Watanabe H.,Kanagawa Environmental Research Center
Carbohydrate Polymers | Year: 2010

Cellulose is the most abundant biomass in the world and constitutes a large fraction of plant biomass. The tight hydrogen-bonding network and van der Waals interactions greatly stabilise cellulose, making it notoriously resistant to hydrolysis. Hence, more efficient pre-treatment procedures are required for the conversion of cellulose to monosaccharides. In this study, the depolymerisation of cellulose and wood in ILs using a solid catalyst is performed successfully. Depolymerisation produces three types of substances: total reducing sugar (TRS), glucose and ethanol. With Avicel, yields of TRS, glucose and ethanol are 76.3% (w/w), 17.2% (w/w) and 4.2% (w/w), respectively. With wood, yields of TRS, glucose and ethanol are 25.6% (w/w), 11.5% (w/w) and 7.7% (w/w), respectively. The time courses of product yields indicates that the depolymerisation of cellulose in [C 4mim]Cl, using Dowex, is similar to the depolymerisation with concentrated H 2SO 4. © 2010 Elsevier Ltd. All rights reserved.


Nguyen T.,Kumamoto University | Yano T.,Kumamoto University | Yokoshima S.,Kanagawa Environmental Research Center | Morihara T.,Ishikawa National College of Technology
INTERNOISE 2014 - 43rd International Congress on Noise Control Engineering: Improving the World Through Noise Control | Year: 2014

The exposure-response relationships for road traffic noise annoyance in Vietnam were proposed according to over 4700 responses obtained in Hanoi, Ho Chi Minh, Da Nang, Hue and Thai Nguyen. However, the variation of the exposure-response curves found among the five cities implied that discrepancies could occur between different geographic regions like the north and the south of Vietnam. To assess the effects of acoustic and non-acoustic factors on road traffic noise annoyance in Vietnam, structural equation models were developed by linking the questionnaire items of the socio-acoustic surveys on road traffic noise annoyance conducted in the five cities. The sample sizes were 1174, 1403, 432, 592, and 633 to estimate the models for Hanoi, Ho Chi Minh, Da Nang, Hue and Thai Nguyen, respectively. The final model included three latent factors: Activity interference; sensitivity; and satisfaction with living environment. Sensitivity to noise, vibration and heat are determinants of personal sensitivity. Activity interference was measured by awakening in the sleep, rest and listening disturbance. Evaluations on quietness of living areas, preference to the living areas and comfort in the dry season are loaded in satisfaction with living environment. The model provided good model fit and indicated that sensitivity and satisfaction with living environment were the main modifiers of road traffic noise annoyance in Vietnam.


Mishima S.,Kanagawa Environmental Research Center | Asano M.,Takasaki Advanced Radiation Research Institute
Kobunshi Ronbunshu | Year: 2014

Diallyl phthalate-containing l-allyl-2-thiourea (FDA/ATU) was chemically bound on poly(styrene-co-divinylbenzene) (PSD) particle surfaces by gamma irradiation. We found that the adsorption of zinc ions increased with increasing amount of ATU on the PSD particles. The adsorption of zinc ions was strongly dependent on the pH, and the maximum effect occured in the region of pH 5-7. At pH 7, the amount of zinc adsorption increased 2.64 times compared with that of the untreated PSD particles. The adsorbed zinc ions suppressed the decomposition of Zinc bisfdimethyl-dithiocarbamate) (Ziram), and thus increased its adsorption capacity. In addition, the FDA/ATU-modified PSD particles could be repeatedly loaded and unloaded. Therefore, we established a simple and quick solid phase adsorption process for Ziram analysis using the FDA/ATU-modified PSD particles. © 2014, The Society of Polymer Science.


Watanabe H.,Kanagawa Environmental Research Center | Yoshino H.,Institute of Environment and Resource Systems
Renewable Energy | Year: 2010

Since hydrogen is a renewable energy source, biohydrogen has been researched in recent years. However, there is little data on hydrogen fermentation by a leachate from a waste landfill as inoculum. We investigated hydrogen production using a leachate from an industrial waste landfill in Kanagawa prefecture. The results showed no methane gas production and the leachate was a suitable inoculum for hydrogen fermentation. The maximum H 2 yield was 2.67 mol of H 2 per mol of carbohydrate added, obtained at 30 °C and initial pH 7. The acetate and butyrate production was significant when the H 2 yield was higher. The oxidation-reduction potential analysis of the culture suggested that hydrogen-producing bacteria in the leachate were facultatively anaerobic. Scanning electron microscope observations revealed hydrogen-producing bacteria comprised bacilli of about 2 μm in length. © 2009 Elsevier Ltd. All rights reserved.


Yokoshima S.,Kanagawa Environmental Research Center | Matsumoto Y.,Saitama University | Shiraishi H.,CSIC - Center for Environmental Sciences | Ota A.,Yokohama National University | Tamura A.,Yokohama National University
42nd International Congress and Exposition on Noise Control Engineering 2013, INTER-NOISE 2013: Noise Control for Quality of Life | Year: 2013

Many studies in Japan have clarified no railway bonus unlike Euro- American countries. To clarify a factor of the difference, the authors examined effects of house vibrations on annoyance due to ground transportation noise. Community responses to noise and vibration were obtained from the surveys which were separately carried out along trunk road, conventional and Shinkansen railways in Japan. Noise and vibration ground were measured on a site-by-site basis for each survey. As for the comparison of dose-response relationship among the modes of ground transportation, the percentage of highly annoyed persons (%HA) due to noise from Shinkansen railway was the highest, followed by conventional railway and road traffic. Likewise, ground vibration from Shinkansen railway was highest and that of road traffic was lowest at the same noise level. Then comparison of %HA according to the level of ground vibration indicated that %HA with high level vibration increased in comparison to low level vibration in each mode. In addition, rattling also contributed to the %HA; the order of the incidence was identical to that for of ground vibration. From these findings, higher annoyance induced-by railways than road traffic in Japan is contributed to the difference in house vibrations.

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