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Major Z.,Johannes Kepler University | Miron M.,Johannes Kepler University | Reiter M.,Johannes Kepler University | Adachi T.,Toyohashi Institute of Technology
19th European Conference on Fracture: Fracture Mechanics for Durability, Reliability and Safety, ECF 2012 | Year: 2012

The failure behavior of short fiber reinforced injection molded thermoplastic polymer matrix components is of prime practical importance for many demanding engineering applications (e.g. automotive). Based on an existing injection molded specimen, which includes weld line, various fracture specimen configurations were developed and implemented in this study. The fracture behavior of these specimens was modeled by various FE methods, considering the specific behavior of an injection molded weld line in short fiber reinforced polymer composites. Source


Kajino M.,Japan Meteorological Agency | Kajino M.,Pacific Northwest National Laboratory | Inomata Y.,Asia Center for Air Pollution Research | Sato K.,Asia Center for Air Pollution Research | And 11 more authors.
Atmospheric Chemistry and Physics | Year: 2012

A new aerosol chemical transport model, the Regional Air Quality Model 2 (RAQM2), was developed to simulate the Asian air quality. We implemented a simple version of a triple-moment modal aerosol dynamics model (MADMS) and achieved a completely dynamic (non-equilibrium) solution of a gas-to-particle mass transfer over a wide range of aerosol diameters from 1 nm to super-μm. To consider a variety of atmospheric aerosol properties, a category approach was utilized in which the aerosols were distributed into four categories: particles in the Aitken mode (ATK), soot-free particles in the accumulation mode (ACM), soot aggregates (AGR), and particles in the coarse mode (COR). The aerosol size distribution in each category is characterized by a single mode. The condensation, evaporation, and Brownian coagulations for each mode were solved dynamically. A regional-scale simulation (Δx Combining double low line 60 km) was performed for the entire year of 2006 covering the Northeast Asian region. The modeled PM1/bulk ratios of the chemical components were consistent with observations, indicating that the simulated aerosol mixing types were consistent with those in nature. The non-sea-salt SO4 2- mixed with ATK + ACM was the largest at Hedo in summer, whereas the SOSO 4 2- was substantially mixed with AGR in the cold seasons. Ninety-eight percent of the modeled NO3 - was mixed with sea salt at Hedo, whereas 53.7% of the NO3 - was mixed with sea salt at Gosan, which is located upwind toward the Asian continent. The condensation of HNO3 onto sea salt particles during transport over the ocean accounts for the difference in the NO3 - mixing type at the two sites. Because the aerosol mixing type alters the optical properties and cloud condensation nuclei activity, its accurate prediction and evaluation are indispensable for aerosol-cloud-radiation interaction studies. © Author(s) 2012. Source


Ueda H.,Toyohashi Institute of Technology | Fukui T.,Institute of Behavioral science | Kajino M.,Meteorological Research Institute | Horiguchi M.,Kyoto University | And 2 more authors.
Journal of the Atmospheric Sciences | Year: 2012

Recently, middle- and upper-atmosphere Doppler radar (MU radar) has enabled the measurement of middle-atmosphere turbulence from radar backscatter Doppler spectra. In this work, eddy diffusivities for momentum K m in the upper troposphere and lower stratosphere during clear-air conditions were derived from direct measurements of the Reynolds stress and vertical gradient of mean wind velocity measured by MU radar. Eddy diffusivity for heat K h below8 km was determined from measurements of temperature fluctuations by the Radio Acoustic Sounding System (RASS) attached to the MU radar. The eddy diffusivity for momentum was on the order of 10 m 2 s -1 in the upper troposphere and decreased gradually in the stratosphere by an order of magnitude or more. The eddy diffusivity for heat was almost of the same order of magnitude as K m. Estimates of eddy diffusivity from the radar echo power spectral width give fairly good values compared with the direct measurement of K m. Applicability of three turbulence models-the spectral width method, the k-ε model modified for stratified flows, and the algebraic stress model-were also examined, using radar observation values of turbulent kinetic energy k and turbulent energy dissipation rate ε together with atmospheric stability observations from rawinsonde data. It is concluded that the algebraic stress model shows the best fit with the direct measurement of K m, even in the free atmosphere above the atmospheric boundary layer once k and ε values are obtained from observations or a model. © 2012 American Meteorological Society. Source


Kajino M.,Tokyo University of Science | Kajino M.,Japan Meteorological Agency | Ueda H.,Toyohashi Institute of Technology | Sato K.,Asia Center for Air Pollution Research | Sakurai T.,Japan NUS Co.
Atmospheric Chemistry and Physics | Year: 2011

The spatial distribution of the source-receptor relationship (SRR) of sulfur over Northeast Asia was examined using a chemical transport model (RAQM) off-line coupled with a meteorological model (MM5). The simulation was conducted for the entire year of 2002. The results were evaluated using monitoring data for six remote stations of the Acid Deposition Monitoring Network in East Asia (EANET). The modeled SO2 and O3 concentrations agreed well with the observations quantitatively. The modeled aerosol and wet deposition fluxes of SO42− were underestimated by 30 % and 50 %, respectively. The domain was divided into 5 source-receptor regions: (I) North China; (II) Central China; (III) South China; (IV) South Korea; and (V) Japan. The sulfur deposition in each receptor region amounted to about 50ĝ€"75 % of the emissions from the same region. The largest contribution to the deposition in each region was originated from the same region, accounting for 53ĝ€"84 %. The second largest contribution was due to Region II, supplying 14ĝ€"43 %. The spatial distributions of the SRRs revealed that subregional values varied by about two times more than regional averages due to nonuniformity across the deposition fields. Examining the spatial distributions of the deposition fields was important for identifying subregional areas where the deposition was highest within a receptor region. The horizontal distribution changed substantially according to season. © 2011 Author(s). Source


Shibasaki I.,Toyohashi Institute of Technology | Shibasaki I.,Noguchi Institute | Kuriyama K.,Chiyoda Corporation | Makino T.,Chiyoda Corporation | And 2 more authors.
IEEJ Transactions on Sensors and Micromachines | Year: 2013

By electrically connecting and placing an InAs deep quantum well (DQW) Hall element as a magnetic sensor chip and a Si IC linear amplifier in a small plastic package, a very small sized InAs DQW linear hybrid Hall IC (InAs DQW LHHIC) with a high magnetic field sensitivity was developed. The output voltage of the hybrid Hall IC showed a very small temperature coefficient of 0.02%/°C and the response time was very small at less than 3μsec. By using this InAs DQW LHHIC, practical current sensors having high sensitivity, high accuracy, and temperature stability were developed. © 2013 The Institute of Electrical Engineers of Japan. Source

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