Search Results - "Somekawa, T."

Remote detection of oils in water using laser Raman spectroscopy by Somekawa, T., Izawa, J., Fujita, M., Kawanaka, J., Kuze, H.

“…We demonstrate the remote detection method of oils in water by laser Raman spectroscopy. A frequency-doubled, Q-switched Nd:YAG laser at 532 nm was used as a…”
Get full text

Study of the solid-state reaction at the interface between lanthanoid-doped ceria and yttria-stabilized zirconia for solid-oxide fuel cell applications by Somekawa, T., Matsuzaki, Y., Tachikawa, Y., Taniguchi, S., Sasaki, K.

“…To develop more highly-efficient SOFCs, we have investigated the thickness of highly resistive layer which consist of solid solutions of CeO2–ZrO2 system…”
Get full text

Achievements of NEDO Durability Projects on SOFC Stacks in the Light of Physicochemical Mechanisms by Yokokawa, H., Suzuki, M., Yoda, M., Suto, T., Tomida, K., Hiwatashi, K., Shimazu, M., Kawakami, A., Sumi, H., Ohmori, M., Ryu, T., Mori, N., Iha, M., Yatsuzuka, S., Yamaji, K., Kishimoto, H., Develos‐Bagarinao, K., Shimonosono, T., Sasaki, K., Taniguchi, S., Kawada, T., Muramatsu, M., Terada, K., Eguchi, K., Matsui, T., Iwai, H., Kishimoto, M., Shikazono, N., Mugikura, Y., Yamamoto, T., Yoshikawa, M., Yasumoto, K., Asano, K., Matsuzaki, Y., Sato, K., Somekawa, T.

“…Achievements of NEDO durability projects on SOFC mode are summarized with a focus on the physicochemical mechanisms characterized by diffusion properties of…”
Get full text

Fabrication of nanocrystalline diamond capsules by hot-filament chemical vapor deposition for direct-drive inertial confinement fusion experiments by Kawasaki, K., Yamada, H., Nagatomo, H., Hironaka, Y., Yamanoi, K., Tanaka, D., Idesaka, T., Mokuno, Y., Chayahara, A., Shimaoka, T., Mima, K., Somekawa, T., Tsukamoto, M., Sato, Y., Iwamoto, A., Shigemori, K.

“…Direct-drive inertial confinement fusion (ICF), where a fuel capsule is imploded by high-power laser beams to cause ignition, is a promising energy production…”
Get full text

Changes in the mechanical properties of support materials for segmented-in-series type solid oxide fuel cells as a function of time by SOMEKAWA, T, MATSUZAKI, Y

“…As the substrate materials for segmented-in-series type solid oxide fuel cells (SOFCs), the mechanical characteristics, such as Young's modulus, of Al sub(2)O…”
Get full text

Laser-fluence dependence of signal enhancement in femtosecond double-pulse laser induced breakdown spectroscopy by Somekawa, T., Otsuka, M., Kuze, H., Maeda, Y., Kawanaka, J., Fujita, M.

“…Laser induced breakdown spectroscopy (LIBS) based on femtosecond laser pulses has widely been used for analyzing chemical elements in samples. In this…”
Get full text

Residual stress and redox cycling of segmented-in-series solid oxide fuel cells by Fujita, K., Somekawa, T., Hatae, T., Matsuzaki, Y.

“…Residual stresses in the electrolytes of segmented-in-series solid oxide fuel cells (SIS-SOFCs) and anode-supported cells (ASCs) were estimated at room…”
Get full text

Recent Achievements of NEDO Durability Project with an Emphasis on Correlation Between Cathode Overpotential and Ohmic Loss by Yokokawa, H., Hori, Y., Shigehisa, T., Suzuki, M., Inoue, S., Suto, T., Tomida, K., Shimazu, M., Kawakami, A., Sumi, H., Ohmori, M., Mori, N., Iha, T., Yamaji, K., Kishimoto, H., Develos‐Bagarinao, K., Sasaki, K., Taniguchi, S., Kawada, T., Muramatsu, M., Terada, K., Eguchi, K., Matsui, T., Iwai, H., Kishimoto, M., Shikazono, N., Mugikura, Y., Yamamoto, T., Yoshikawa, M., Yasumoto, K., Asano, K., Matsuzaki, Y., Amaha, S., Somekawa, T.

“…Long‐term performance testes by CRIEPI (Central Research Institute for Electric Power Industry) on six industrial stacks have revealed an interesting…”
Get full text

Residual stress change with time of a segmented-in-series solid oxide fuel cell using an in situ X-ray stress measuring method by Somekawa, T., Fujita, K., Matsuzaki, Y.

“…The changes with time of the residual stress on the electrolyte were measured in situ during re-oxidation under solid oxide fuel cell (SOFC) operation…”
Get full text

Ultrahigh-energy density state in nanowire arrays irradiated with picosecond kilojoule-class ultra-intense laser by Tanaka, D., Maeda, Y., Hironaka, Y., Kawasaki, K., Higashi, N., Iwata, N., Sentoku, Y., Kodama, R., Ozaki, N., Somekawa, T., Shinguubara, S., Shimizu, T., Sawada, H., Shigemori, K.

“…Ultrahigh-energy density (UHED) states greater than 1 Gbar pressure are typically observed under extreme conditions, such as in the core of an inertial…”
Get full text

A study of electrically insulated oxide substrates for flat-tube segmented-in-series solid oxide fuel cells by Somekawa, T., Horiuchi, K., Matsuzaki, Y.

“…► Characteristics of MgO–NiO–YSZ were examined for support materials in SIS-SOFC. ► MgO–NiO–YSZ showed minimal size and structural changes during redox at 800…”
Get full text

Characterization of yttrium-doped ceria with various yttrium concentrations as cathode interlayers of SOFCs by Somekawa, T., Matsuzaki, Y., Tachikawa, Y., Taniguchi, S., Sasaki, K.

“…This study focuses on enhancing the efficiency of solid oxide fuel cells (SOFCs) by modulating the thickness of the highly resistive solid solution layer of…”
Get full text

Development of a Highly Efficient SOFC Module Using Two‐stage Stacks and a Fuel Regeneration Process by Nakamura, K., Ide, T., Taku, S., Nakajima, T., Shirai, M., Dohkoh, T., Kume, T., Ikeda, Y., Somekawa, T., Kushi, T., Ogasawara, K., Fujita, K.

“…A solid oxide fuel cell (SOFC) module using two‐stage stacks and a fuel regeneration process between them was developed in this study for the first time, to…”
Get full text

Evaluation of the redox stability of segmented-in-series solid oxide fuel cell stacks by Fujita, K., Somekawa, T., Horiuchi, K., Matsuzaki, Y.

“…The tolerance for the reduction and oxidation (redox) reactions of the segmented-in-series solid oxide fuel cells (SIS-SOFCs) has been investigated. In…”
Get full text

All femtosecond optical pump and x-ray probe: holey-axicon for free electron lasers by Anand, V, Maksimovic, J, Katkus, T, Ng, S H, Ul inas, O, Mikutis, M, Baltrukonis, J, Urbas, A, Šlekys, G, Ogura, H, Sagae, D, Pikuz, T, Somekawa, T, Ozaki, N, Vailionis, A, Seniutinas, G, Mizeikis, V, Glazebrook, K, Brodie, J P, Stoddart, P R, Rapp, L, Rode, A V, Gamaly, E G, Juodkazis, S

“…We put forward a co-axial pump (optical)-probe (x-rays) experimental concept and show performance of the optical component. A Bessel beam generator with a…”
Get full text

Ageing of anode-supported solid oxide fuel cell stacks including thermal cycling, and expansion behaviour of MgO–NiO anodes by Van herle, J., Perednis, D., Nakamura, K., Diethelm, S., Zahid, M., Aslanides, A., Somekawa, T., Baba, Y., Horiuchi, K., Matsuzaki, Y., Yoshimoto, M., Bucheli, O.

“…This paper reports on medium term tests of anode-supported five-cell short stacks, as well as on some separate anode development. Two stacks were operated…”
Get full text

Nondestructive Sensor Using Microwaves From Laser Plasma by Subnanosecond Laser Pulses by Nakajima, H., Shimada, Y., Somekawa, T., Fujita, M., Tanaka, K.A.

“…Conventional ground-penetrating radar (GPR) requires large-aperture antennas or long-span measurements to survey a remote location precisely. We propose a…”
Get full text

Flash resonance Raman lidar for SO2 gas leak detection by Somekawa, T., Ichikawa, Y., Ogita, M., Sugimoto, S., Chosrowjan, H., Taniguchi, S., Asahi, I.

“…We present a demonstration of flash resonance Raman lidar for leak detection of SO2 gas. An optical parametric oscillator (OPO) with a deep UV tuning range…”
Get full text

Wafer-to-wafer selective flip-chip transfer by sticky silicone bonding and laser debonding for rapid and easy integration test by Tanaka, S., Yoshida, M., Hirano, H., Somekawa, T., Fujita, M., Esashi, M.

“…Wafer-bonding-based integration can be rapidly and easily tested between different types of devices by wafer-to-wafer flip-chip transfer technology described…”
Get full text

Wafer-to-wafer transfer process of barium strontium titanate metal-insulator-metal structures by laser pre-irradiation and gold-gold bonding for frequency tuning applications by Samoto, T., Hirano, H., Somekawa, T., Hikichi, K., Fujita, M., Esashi, M., Tanaka, S.

“…This is the first report on successful direct transfer of barium strontium titanate (BST) grown on a sapphire substrate at high temperature (~650 °C) to a…”
Get full text