805 research outputs found
縮環芳香環積層分子の合成とその機能化
京都大学0048新制・課程博士博士(工学)甲第19006号工博第4048号新制||工||1623(附属図書館)31957京都大学大学院工学研究科高分子化学専攻(主査)教授 中條 善樹, 教授 赤木 和夫, 教授 秋吉 一成学位規則第4条第1項該当Doctor of Philosophy (Engineering)Kyoto UniversityDGA
Coherent control of a flux qubit by phase-shifted resonant microwave pulses
The quantum state of a flux qubit was successfully pulse-controlled by using
a resonant microwave. We observed Ramsey fringes by applying a pair of
phase-shifted pi/2 microwave pulses without introducing detuning. With this
method, the qubit state can be rotated on an arbitrary axis in the x-y plane of
the Bloch sphere in a rotating frame. We obtained a qubit signal from a
coherent oscillation with an angular velocity of up to 2pi*11.4 Grad/s. In
combination with Rabi pulses, this method enables us to achieve full control of
single qubit operation. It also offers the possibility of orders of magnitude
increases in the speed of the arbitrary unitary gate operation.Comment: 3 pages, 3 figure
THE CORRELATIONS BETWEEN RECENT HISTORIES OF LOW BACK PAIN AND TRUNK STRENGTHS IN COLLEGIATE JUDOISTS
High occurrence of low back pain (LBP) in competitive judoists has been well documented. Since spine stability deficits could be associated with an incidence of low back injury, sufficient trunk strength is required for LBP prevention. Some studies have indicated that trunk strength weakness may be one of the risk factor for LBP in non-athlete population, yet there is little consensus on the correlation between LBP and trunk strength in competitive judoists. Therefore, the purpose of this study is to demonstrate the correlations between LBP experience and isometric strength of trunk flexion, extension and lateral flexion in collegiate judoists
A Visual Learning Tool for Database Operation
In this paper we propose sAccess, a web-based learning tool
for database education. It focuses on introductory computer
science education for high school and college. sAccess has
an easy-to-use query interface for manipulating databases.
Using this tool, students can learn the fundamental knowl-
edge of relational database practically. In this paper, we
will explain the overview of design and implementation of
sAccess
A locally-induced increase in intracellular Ca2+ propagates cell-to-cell in the presence of plasma membrane Ca2+ ATPase inhibitors in non-excitable cells
AbstractIntercellular Ca2+ waves are commonly observed in many cell types. In non-excitable cells, intercellular Ca2+ waves are mediated by gap junctional diffusion of a Ca2+ mobilizing messenger such as IP3. Since Ca2+ is heavily buffered in the cytosolic environment, it has been hypothesized that the contribution of the diffusion of Ca2+ to intercellular Ca2+ waves is limited. Here, we report that in the presence of plasma membrane Ca2+ ATPase inhibitors, locally-released Ca2+ from the flash-photolysis of caged-Ca2+ appeared to induce further Ca2+ release and were propagated from one cell to another, indicating that Ca2+ was self-amplified to mediate intercellular Ca2+ waves. Our findings support the notion that non-excitable cells can establish a highly excitable medium to communicate local responses with distant cells
Yukawa Hierarchy Transfer Based on Superconformal Dynamics and Geometrical Realization in String Models
We propose a scenario that leads to hierarchical Yukawa couplings and
degenerate sfermion masses at the same time, in the context of
extra-dimensional models, which can be naturally embedded in a wide class of
string models. The hierarchy of Yukawa couplings and degeneracy of sfermion
masses can be realized thanks to superconformal gauge dynamics. The sfermion
mass degeneracy is guaranteed by taking the superconformal fixed point to be
family independent. In our scenario, the origin of Yukawa hierarchy is
attributed to geometry of compactified dimensions and the consequent volume
dependence of gauge couplings in the superconformal sectors. The difference in
these gauge couplings is dynamically transferred to the hierarchy of the Yukawa
couplings. Thus, our scenario combines a new dynamical approach and the
conventional geometrical approach to the supersymmetric flavor problem.Comment: 12 pages, latex, no figur
Searching for gravitational wave echoes from black hole binary events in the third observing run of LIGO, Virgo, and KAGRA collaborations
Gravitational wave echo signals have been proposed as evidence for the
modification of the spacetime structure near the classical event horizon. These
signals are expected to occur after the mergers of compact binaries as a
sequence of weak pulse-like signals. Some studies have shown evidence of the
echo signals from several binary black hole merger events. On the other hand,
the other studies have shown the low significance of such signals from various
events in the first, second and third observing runs (O1, O2 and O3). Our
previous study also shows the low significance of echo signals from events in
O1 and O2, though, we observe that more than half of the events have p-value
smaller than 0.1 when the simply modeled waveform is used for the analysis.
Since there are only nine events appropriate for this analysis in O1 and O2, it
is necessary to analyze more events to evaluate the significance statistically.
In this study, we search for echo signals from binary black hole events
observed during O3 operated by LIGO, Virgo and KAGRA collaborations. We perform
the template-based search by using two different models for echo signal
templates: simply modeled one and physically motivated one. Our results show
that the distributions of p-values for all events analyzed in this study are
consistent with the noise distribution. This means that no significant echo
signals are found for both models from O3 events.Comment: 11 page
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