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51.
Hiroki Kanda Brian Beckford Takeji Fujibayashi Takao Fujii Yu Fujii Kenta Futatsukawa Toshiyuki Gogami Yun-Cheng Han Osamu Hashimoto Kentaro Hirose Ryotaro Honda Kenji Hosomi Alan Iguchi Takatsugu Ishikawa Yusuke Kaneko Masashi Kaneta Yuma Kasai Daisuke Kawama Taito Kawasaki Chigusa Kimura Shogo Kiyokawa Takeshi Koike Kazushige Maeda Tomofumi Maruta Nayuta Maruyama Masao Matsubara Koji Miwa Yohei Miyagi Sho Nagao Satoshi N. Nakamura Akira Okuyama Kotaku Suzuki Tadaaki Tamae Hirokazu Tamura Nobuhiro Terada Kyo Tsukada Tie-Shang Wang Fumiya Yamamoto Takeshi O. Yamamoto Hirohito Yamazaki 《Few-Body Systems》2013,54(7-10):1175-1178
Photoproduction of the neutral kaon on the deuteron has been investigated at the Research Center for Electron Photon Science, Tohoku University. We constructed the Neutral Kaon Spectrometer-2 for the detection of charged particles from the decay of the neutral kaon and the hyperon. We obtained a momentum distribution of K 0 with the inclusive measurement. It was consistent with the previous measurement. The total cross section of γ + d → K 0 + Λ + p was estimated from the measured integral cross section of γ + d → Λ + X. The total cross section with respect to the photon energy was compared with the theoretical calculations. It favored the Saclay-Lyon A model calculation with the ratio of the neutral to charged coupling constants of the axial-vector meson, K 1, as ~ ?1.5. The energy dependence and the magnitude of the total cross section were similar to the total cross section of γ + p → K + Λ. 相似文献
52.
53.
We show that the Smith normal form of a skew‐symmetric D ‐optimal design of order is determined by its order. Furthermore, we show that the Smith normal form of such a design can be written explicitly in terms of the order , thereby proving a recent conjecture of Armario. We apply our result to show that certain D ‐optimal designs of order are not equivalent to any skew‐symmetric D ‐optimal design. We also provide a correction to a result in the literature on the Smith normal form of D ‐optimal designs. 相似文献
54.
Itaru Sato Yohei Matsueda Kousuke Kadowaki Shigeru Yonekubo Takanori Shibata Kenso Soai 《Helvetica chimica acta》2002,85(10):3383-3387
1,3‐Disubstituted chiral allenes without any heteroatoms act as chiral initiators in the addition of (i‐Pr)2Zn to pyrimidine‐5‐carbaldehyde to afford, in combination with the subsequent asymmetric autocatalysis, chiral pyrimidin‐5‐yl alkanols with up to 98% ee. The absolute configuration of the pyrimidin‐5‐yl alkanol formed depend on that of the chiral allene. 相似文献
55.
A lectin-impregnated gel was fabricated at the channel crossing point in a microfluidic chip made from polymethyl methacrylate (PMMA). The acrylamide containing lectin was photopolymerized to form a round gel (radius 60 μm) by irradiation with an argon laser, which was also used for fluorometric detection. This gel was applied to specific concentration, elution, and electrophoretic separation of fluorescent-labeled oligosaccharides. Because the lectin in the polyacrylamide gel was mechanically immobilized, it maintained its activity. The lectin was used to trap up to a few tens of femtomoles of specific oligosaccharides labeled with 8-aminopyrene-1,3,6-trisulfonic acid with 2 min by a factor >800, and the amount trapped corresponded to ca. 70% of lectin in the gel. The trapped oligosaccharides were released from the gel by lowering the pH with an acidic background electrolyte. The oligosaccharides that eluted as a broad band were concentrated by transient isotachophoresis stacking using concentrated sodium borate buffer (pH 11.0). The stacked sample components were then separated and fluorometrically detected at the end of the separation channel. Under the optimized conditions, resolution of the saccharides was good, and was similar to that obtained by pinched injection. The method was applied to preconcentration and analysis of oligosaccharides derived from some glycoproteins. 相似文献
56.
57.
We theoretically study a possible topological superconductivity in the interacting two layers of Rashba systems, which can be fabricated by the heterostructures of semiconductors and oxides. The hybridization, which induces the gap in the single particle dispersion, and the electron-electron interaction between the two layers leads to the novel phase diagram of the superconductivity. It is found that the topological superconductivity without breaking time-reversal symmetry is realized when (i) the Fermi energy is within the hybridization gap, and (ii) the interlayer interaction is repulsive, both of which can be satisfied in realistic systems. Edge channels are studied in a tight-binding model numerically, and the several predictions on experiments are also given. 相似文献
58.
Norimitsu Yoshida Sho Terazawa Kotaro Hayashi Tomonari Hamaguchi Hironori Natsuhara Shuichi Nonomura 《Journal of Non》2012,358(17):1987-1989
Effects of deposition conditions on the structure of microcrystalline silicon carbide (μc-SiC) films prepared by hot-wire chemical vapor deposition (hot-wire CVD) method have been investigated. It is found from X-ray diffraction patterns of the film that a diffraction peak from crystallites from hexagonal polytypes of SiC is observed in addition to those of 3 C-SiC crystallites. This result is obtained in the film under a narrow deposition conditions of SiH3CH3 gas pressure of 8 Pa, the H2 gas pressure of 80–300 Pa and the total gas pressure of 40–300 Pa under fixed substrate and filament temperatures employed in this study. Furthermore, the grain size of hexagonal crystallites (about 20 nm) on c-Si substrates becomes larger than that of 3 C-SiC crystallites (about 10 nm) for the films deposited under the total gas pressure of 36–88 Pa. The fact that microcrystalline hexagonal SiC can be deposited under limited deposition conditions could be interpreted in the context of a result for c-SiC polytypes prepared by thermal CVD method. 相似文献
59.
60.
Nobuyuki Kawahara Eiji Tomita Takuya Kadowaki Tetsuya Honda Hideaki Katashiba 《Experiments in fluids》2010,49(4):925-936
Vaporized fuel concentration in a spray-guided direct-injection spark-ignition (SG-DISI) engine was measured using an optical
sensor installed in a spark plug. A laser infrared absorption method was applied to quantify the instantaneous gasoline concentration
near the spark plug. This paper discusses the feasibility of obtaining in situ air–fuel ratio measurements with this sensor
installed inside an SG-DISI engine cylinder. First, the effects of the spray plume from a multi-hole injector on the vaporized
fuel concentration measurements near the spark-plug sensor were examined using a visible laser. We determined the best position
for the sensor in the engine, which was critical due to the spray and vapor plume formation. Then, a 3.392-μm He–Ne laser
that coincided with the absorption line of the hydrocarbons was used as a light source to examine the stratified mixture found
during ultra-lean engine operation. A combustible mixture existed around the spark plug during the injection period when a
preset air–fuel ratio of 45.0 was used with different fuel injection timings and net mean effect pressure conditions. The
effects of the orientation of the spark plug on the measured results and ignitability of the SG-DISI engine were examined.
Orienting the spark plug vertically to one of the spray plumes provided more accurate results and better engine reliability.
The study demonstrated that it was possible to qualify the air–fuel ratio near the spark plug during the injection period
using the developed spark-plug sensor in an SG-DISI engine. 相似文献