4,596 research outputs found
Nongassing NiCd battery cell
Method of constructing nickel cadmium batteries prevents excessive gas buildup and allows hermetic sealing of battery for increased service life and reduced maintenance cost
Partial and macroscopic phase coherences in underdoped BiSrCaCuO thin film
A combined study with use of time-domain pump-probe spectroscopy and
time-domain terahertz transmission spectroscopy have been carried out on an
underdoped BiSrCaCuO thin film. It was observed that
the low energy multi-excitation states were decomposed into superconducting gap
and pseudogap. The pseudogap locally opens below K
simultaneously with the appearance of the high-frequency partial pairs around
1.3 THz. With decreasing temperature, the number of the local domains with the
partial phase coherence increased and saturated near 100 K, and the macroscopic
superconductivity appeared below 76 K through the superconductivity fluctuation
state below 100 K. These experimental results indicate that the pseudogap makes
an important role for realization of the superconductivity as a precursor to
switch from the partial to the macroscopic phase coherence.Comment: Revtex4, 4 pages, 4 figure
Oxygen Phonon Branches in Detwinned YBa2Cu3O7
We report results of inelastic neutron scattering measurements of phonon
dispersions on a detwinned sample of YBaCu3O7 and compare them with model
calculations. Plane oxygen bond stretching phonon branches disperse steeply
downwards from the zone center in both the a and the b direction indicating a
strong electron-phonon coupling. Half way to the zone boundary, the phonon
peaks become ill-defined but we see no need to invoke unit cell doubling or
charge stripe formation: lattice dynamical shell model calculations predict
such behavior as a result of branch anticrossings. There were no observable
superconductivity-related temperature effects on selected plane oxygen bond
stretching modes measured on a twinned sample.Comment: 5 pages, 3 figures, To appear in Journal of Low Temperature Physics
(Proceedings of MOS2002; Revised version (1) with many changes throughout the
tex
Handling of a constrained flexible object by a robot
科研費報告書収録論文(課題番号:07455416・基盤研究(B)(2)・H7~H9/研究代表者:内山, 勝/フレキシブル双腕ロボットの協調制御に関する研究
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