Engineering

27 Amaya, T. *1 ; Seki, S. *1 ; Moriuchi, T. *1 ; Nakamoto, K. *1 ; Nakata, T. *1 ; Sakane, H. *1 ; Saeki, A. *2 ; Tagawa, S. *2 ; Hirao, T. *1
*1 (Graduate School of Engineering)
*2 (Institute of Scientific and Industrial Research)
Anisotropic Electron Transport Properties in Sumanene Crystal
Journal of American Chemical Society, 131, 408-409 (2009)

The electronic properties of carbon materials such as fullerenes and nanotubes are the subject of great research interest. A third, and so far less investigated, type of carbon materials is bowl shaped polyaromatic hydrocarbons (π-bowls). The needle-like single crystal of π-bowl sumanene displayed the high electron mobility with large anisotropy, which is the first example for π-bowls. These findings may allow the development of electrical materials such as OFET based on π-bowls.


28 Bao, H.; Kondo, A.; Kaga, A.; Tada, M.; Sakaguti, K.; Inoue, Y.; Shimoda, Y.; Narumi, D.; Machimura, T.
(Graduate School of Engineering)
Biogenic Volatile Organic Compound Emission Potential of Forests and Paddy Fields in the Kinki Region of Japan
Envirionmental Research, 106, 156-169 (2008)

The standard biogenic volatile organic compound (BVOC) emissions from 10 Japanese plant species were measured. BVOC emission experiments were conducted in a growth chamber where temperature and light intensity can be controlled. Broadleaf tree emitted isoprene and showed emission dependence on light intensity and temperature. Needle-leaf tree emitted monoterpenes and also showed emission dependence on temperature. The emission of isoprene and monoterpenes from the Kinki region were estimated to be 596 and 54 ton / h, respectively. Of note, though the amount of monoterpenes from O. sativa is small, it contributes approximately 5% to the total monoterpene emissions due to the huge land area covered by paddy fields.


29 Deac, A. M.; Fukushima, A.; Kubota, H.; Maehara, H.; Suzuki, Y.; Yuasa, S.; Nagamine, Y.; Tsunekawa, K.; Djayaprawira, D. D.; Watanabe, A.
(Graduate School of Engineering Science)
Bias-driven High-power Microwave Emission from MgO-based Tunnel Magnetoresistance Devices
Nature Physics, 4, 803-809 (2008)

Using spin-momentum transfer between a spin-polarized current and a ferromagnetic layer, we demonstrate that microwave signals with device-compatible output power levels can be generated from a single magnetic tunnel junction with a lateral size of 100 nm, seven orders of magnitude smaller than conventional radio-frequency oscillators. The obtained power is about 1000 times larger than that obtained on all-metallic structures, reflecting the giant magneto-resistive effect in the MgO barrier tunnel junctions.


30 Fukuzumi, S.; Ohkubo, K.; Zhu, W.; Sintic, M.; Khoury, T.; Sintic, P. J.; Wenbo, E; Ou, Z.; Crossley, M. J.; Kadish, K. M.
(Graduate School of Engineering)
Androgynous Porphyrins. Silver(II) Quinoxalinoporphyrins Act as Both Good Electron Donors and Acceptors
Journal of the American Chemical Society, 130, 9451-9458 (2008)

Introduction of quinoxaline groups fused to the Ag(II) porphyrin macrocycle provides a unique androgynous character to Ag(II) quinoxalinoporphyrins that enables them to act as both good electron donors and good electron acceptors confirmed by the electrochemical HOMO-LUMO gap. Such a unique androgynous character of Ag(II) quinoxalinoporphyrins opens new opportunities to use the same compound as both an electron donor and acceptor moiety in charge-separation ensembles which is generated by photoinduced electron-transfer reaction.


31 Furusawa, C. *1 ; Ono, N. *1 ; Suzuki, S. *1 ; Agata, T. *1 ; Shimizu, H. *1 ; Yomo, T. *1, 2
*1 (Graduate School of Information Science and Technology)
*2 (Graduate School of Frontier Biosciences)
Model-based Analysis of Non-specific Binding for Background Correction of High-density Oligonucleotide Microarrays
Bioinformatics, 25, 36-41 (2009)


32 Hamada, K. *1 ; Fujita, K. *2 ; Smith, N. I. *2 ; Kobayashi, M.; Inouye, Y. *1 ; Kawata, S. *2
*1 (Graduate School of Frontier Biosceinces)
*2 (Graduate School of Engineering)
Raman Microscopy for Dynamic Molecular Imaging of Living Cells
Journal of Biomedical Optics, 13(4), 044027 (2008)

Raman scattering has been utilized to investigate molecular structures and their environment in samples. We reported a technique that uses Raman scattering for microscopic observation of intracellular structures of a living cell. Raman scattering monitors molecular vibrations in a sample, which offers label-free molecular imaging technique of living biological samples. With the developed microscope, dynamics of molecules in living cancer cells has been clearly observed with the temporal resolution of 3 minutes without any labeling.


33 Harada, T. *1 ; Ikeda, S. *1 ; Ng, Y. H. *1 ; Sakata, T. *2 ; Mori, H. *2 ; Torimoto, T.; Matsumura, M. *1
*1(Research Center for Solar Energy Chemistry)
*2(Research Center for Ultra-high Voltage Electron Microscopy)
Rhodium Nanoparticle Encapsulated in a Porous Carbon Shell as an Active Heterogeneous Catalyst for Aromatic Hydrogenation
Advanced Functional Materials, 18, 2190-2196 (2008)


34 Hayashi, M. *1 ; Koychev, E. V. *1 ; Okamura, K. *1 ; Sugeta, A.; Hongo, C. *2 ; Okuyama, K. *2 ; Ebisu, S. *1
*1 (Graduate School of Dentistry)
*2 (Graduate School of Science)
Heat Treatment Strengthens Human Dentin
Journal of Dental Research, 87(8), 762-766 (2008)


35 Heremans, J. P.; Jovovic, V.; Toberer, E. S.; Saramat, A.; Kurosaki, K.; Charoenphakdee, A.; Yamanaka, S.; Snyder, G. J.
(Graduate School of Engineering)
Enhancement of Thermoelectric Efficiency in PbTe by Distortion of the Electronic Density of States
Science, 321, 554-557 (2008)


36 Higo, Y.; Kusumoto, S.; Inoue, K.
(Graduate School of Information Science and Technology)
A Metric-based Approach to Identify Refactoring Opportunities for Merging Code Clones in a Java Software System
Journal of Software Maintenance and Evolution: Research and Practice, 20, 435-461 (2008)

A code clone is a code fragment that has other code fragments identical or similar to it in the source code. The presence of code clones is generally regarded as one factor that makes software maintenance more difficult. This paper proposes a set of metrics that are indicators how the code clones can be removed. The metrics can be measured by only lightweight source code metrics; hence, they can be applied to a large number of code lines. The application result shows that the metrics are very useful to remove code clones.


37 Imanaka, N.; Masui, T.; Egawa, T.; Imadzu, H.
(Graduate School of Engineering)
Novel Catalysts for Low-temperature Combustion of Diesel Particulate Matter
Journal of Materials Chemistry, 19, 208-210 (2009)

Novel oxidation catalysts based on CeO 2 –Pr 6 O 11 –Bi 2 O 3 solid solutions were synthesized for combustion of the particulate matter at low temperatures. The formation of the CeO 2 –Pr 6 O 11 –Bi 2 O 3 solid solutions promotes release and storage of oxygen molecules at low temperatures, in particular on or near the surface of the solid solutions. This redox property contributes to the oxidation of particulate matter collected in a diesel particulate filter, and the complete oxidation was realized at as low as 345°C.
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