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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. Source


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. Source


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. Source


Kotani T.,Fujita Corporation | Tomita R.,Nihon University | Yokoshima S.,Kanagawa Environmental Research Center | Izumi Y.,Railway Technical Research Institute | And 2 more authors.
AIJ Journal of Technology and Design | Year: 2014

To accumulate measurements of building vibrations, Sub Committee on Measurement and Analysis of Environmental Vibration and Goto laboratory at Hosei University have jointly carried out the measurement of building vibrations caused by conventional railway in a two-story wooden apartment house since 2003. In this period, for the purpose of replacing grade crossings with overpasses, the railway structure was shifted from ground railway to elevated railway. Since measurements were obtained between before and after making elevated railway, this paper focuses on the change in the building vibration characteristics and building vibration amplifications for ground-borne vibrations. Source


Yokoshima S.,Kanagawa Environmental Research Center | Yano T.,Kumamoto University | Kawai K.,Kumamoto University | Morinaga M.,Defence Facilities Environment Improvement Association | Ota A.,Yokohama National University
41st International Congress and Exposition on Noise Control Engineering 2012, INTER-NOISE 2012 | Year: 2012

Technical subcommittee on Socio-Acoustic Survey Data Archive, which was set up in the Institute of Noise Control Engineering/Japan in 2009 has managed SAS Data Archive (SASDA) since 2011. The SASDA, an archive of data mainly concerning community response to transportation noise in Japan, is constituted of datasets deposited by the committee members and the Ministry of the Environment in Japan. The number of collected data exceed 20,000 as of December 2011. We compare dose-response curves among noises from road traffic, conventional railway, Shinkansen railway, civil aircraft, and military aircraft by Self-Defense Force and/or U.S. Military Force. We use LAeq for 24 hours and Ldn as noise metrics. Community response is measured by annoyance due to major specific noise source. Although the number of data on aircraft noise is not enough, military aircraft noise indicates the severest annoyance. The second highest annoyance is civil aircraft noise and Shinkansen Railway noise, followed by conventional railway, road traffic noises. To validate the representativeness of the dose-response curves, we discuss factors affecting the difference in annoyance. Source

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