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Astrochemical Properties of Planck Cold Clumps
Tatematsu, Ken’ichi,Liu, Tie,Ohashi, Satoshi,Sanhueza, Patricio,Nguyê,̃,n Lu’o’, Quang,Hirota, Tomoya,Liu, Sheng-Yuan,Hirano, Naomi,Choi, Minho,Kang, Miju,A.Thompson, Mark,Fuller, Gary,Wu, Y Published by the University of Chicago Press for t 2017 The Astrophysical journal Supplement series Vol.228 No.2
<P>We observed 13 Planck cold clumps with the James Clerk Maxwell Telescope/SCUBA-2 and with the Nobeyama 45 m radio telescope. The N2H+ distribution obtained with the Nobeyama telescope is quite similar to SCUBA-2 dust distribution. The 82 GHz HC3N, 82 GHz CCS, and 94 GHz CCS emission are often distributed differently with respect to the N2H+ emission. The CCS emission, which is known to be abundant in starless molecular cloud cores, is often very clumpy in the observed targets. We made deep single-pointing observations in DNC, (HNC)-C-13, N2D+, and cyclic-C3H2 toward nine clumps. The detection rate of N2D+ is 50%. Furthermore, we observed the NH3 emission toward 15 Planck cold clumps to estimate the kinetic temperature, and confirmed that most targets are cold (less than or similar to 20 K). In two of the starless clumps we observed, the CCS emission is distributed as it surrounds the N2H+ core (chemically evolved gas), which resembles the case of L1544, a prestellar core showing collapse. In addition, we detected both DNC and N2D+. These two clumps are most likely on the verge of star formation. We introduce the chemical evolution factor (CEF) for starless cores to describe the chemical evolutionary stage, and analyze the observed Planck cold clumps.</P>
Integrated Waste Management and Recycling for ELV in Japan
( Ken-ichi Sasaki ) 한국폐기물자원순환학회(구 한국폐기물학회) 2019 ISSE 초록집 Vol.2019 No.-
In Japan, the Law for the Recycling of End-of-Life Vehicles was enacted in 2002 and was enforced in full scale in 2005. This law greatly improved environmental conditions by obliging stakeholders, especially automobile manufacturers, to carry out appropriate roles. Specifically, the number of illegal dumping and improper storage nationwide has decreased to less than 5% before the enforcement of the law, and the recycling rate including heat utilization has been continuously exceeding 95% in recent several years. Moreover, the latest report shows the recycling rate of shredder residue is 98.2% and that of air bag is 94% in 2017. This time, we the DOWA group, as Japan's largest private enterprise in the field of waste management/recycling, review and present the followings: - Reasons and factors why the system prescribed by the law in Japan was steadily taken root - Effectiveness of WtE and metal recycling using shredder residue as a raw material - Our recent recycling efforts for hybrid/electric vehicles
Ken-ichi Kamo,Hirokazu Yanagihara,Akio Kato,Atsushi Yoshimoto 강원대학교 산림과학연구소 2008 Journal of Forest Science Vol.24 No.3
In this paper, we apply a logistic regression model to the data of snow damage on sugi (Cryptomeria japonica) occurred in Toyama prefecture (in Japan) in 2004 for estimating the risk probability. In order to specify the factors effecting snow damage, we apply a model selection procedure determining optimal subset of explanatory variables. In this process we consider the following 3 information criteria, 1) Akaike’'s information criterion, 2) Baysian information criterion, 3) Bias-corrected Akaike’'s information criterion. For the selected variables, we give a proper interpretation from the viewpoint of natural disaster.