483 research outputs found
Higher-Derivative Corrections to the Asymptotic Virasoro Symmetry of 4d Extremal Black Holes
We study the asymptotic Virasoro symmetry which acts on the near-horizon
region of extremal four-dimensional black hole solutions of gravity theories
with higher-derivative corrections, following the recently proposed Kerr/CFT
correspondence. We demonstrate that its central charge correctly reproduces the
entropy formula of Iyer-Wald, once the boundary terms in the symplectic
structure are carefully chosen.Comment: 36 page
A linear mixed-effect model analysis of the ef fect of schizotypal personality traits on confidence in reality monitoring
Protein Transduction Method for Cerebrovascular Disorders
Many studies have shown that a motif of 11 consecutive arginines (11R) is one of the most effective protein transduction domains (PTD) for introducing proteins into the cell membrane. By conjugating this "11R", all sorts of proteins can effectively and harmlessly be transferred into any kind of cell. We therefore examined the transduction efficiency of 11R in cerebral arteries and obtained results showing that 11R fused enhanced green fluorescent protein (11R-EGFP) immediately and effectively penetrated all layers of the rat basilar artery (BA), especially the tunica media. This method provides a revolutionary approach to cerebral arteries and ours is the first study to demonstrate the successful transductionof a PTD fused protein into the cerebral arteries. In this review, we present an outline of our studies and other key studies related to cerebral vasospasm and 11R, problems to be overcome, and predictions regarding future use of the 11R protein transduction method for cerebral vasospasm (CV).</p
High revivability of vitrified-warmed bovine mature oocytes after recovery culture with alpha-tocopherol
online publication: 27 January 2015The objective of this study was to investigate whether developmental competence of vitrified–warmed bovine oocytes can be improved by antioxidant treatment during recovery culture. In experiment 1, one of the two antioxidants (either l-ascorbic acid or α-tocopherol) was added as a supplement to the recovery culture medium to which postwarming oocytes were exposed for 2 h before IVF. The exposure to α-tocopherol had a positive effect on rescuing the oocytes as assessed by the blastocyst yield 8 days after the IVF (35.1–36.3% vs 19.2–25.8% in untreated postwarming oocytes). Quality of expanding blastocysts harvested on Day 8 was comparable between α-tocopherol-treated vitrification group and fresh control group in terms of total cell number and chromosomal ploidy. In experiment 2, level of reactive oxygen species, mitochondrial activity, and distribution of cortical granules in α-tocopherol-treated postwarming oocytes were assessed. No obvious differences from the control data were found in these parameters. However, the treatment with α-tocopherol increased the percentage of zygotes exhibiting normal single aster formation (90.3% vs 48.0% in untreated postwarming oocytes; 10 h post-IVF). It was concluded that α-tocopherol treatment of vitrified–warmed bovine mature oocytes during recovery culture can improve their revivability, as shown by the high blastocyst yield and the higher mean total cell number in the blastocysts.ArticleREPRODUCTION. 149(4):347-355 (2015)journal articl
Coarse-graining of bubbling geometries and the fuzzball conjecture
In the LLM bubbling geometries, we compute the entropies of black holes and
estimate their "horizon" sizes from the fuzzball conjecture, based on
coarse-graining on the gravity side. The differences of black hole microstates
cannot be seen by classical observations. Conversely, by counting the possible
deformations of the geometry which are not classically detectable, we can
calculate the entropy. We carry out this method on the black holes of the LLM
bubbling geometries, such as the superstar, and obtain the same result as was
derived by coarse-graining directly on the CFT (fermion) side. Second, by
application of this method, we can estimate the "horizon" sizes of those black
holes, based on the fuzzball conjecture. The Bekenstein-Hawking entropy
computed from this "horizon" agrees with that microscopic entropy above. This
result supports the fuzzball conjecture.Comment: 17 pages, LaTeX; v2: minor corrections, references added, v3: minor
corrections, version to appear in Phys. Rev.
Late gadolinium enhancement on cardiac magnetic resonance predicts coronary vasomotor abnormality and myocardial lactate production in patients with chronic heart failure
Olmesartan reverses not only vascular endothelial dysfunction but cardiac diastolic dysfunction in hypertensive patients with heart failure with preserved ejection fraction — ORION study
Learning suction graspability considering grasp quality and robot reachability for bin-picking
Deep learning has been widely used for inferring robust grasps. Although
human-labeled RGB-D datasets were initially used to learn grasp configurations,
preparation of this kind of large dataset is expensive. To address this
problem, images were generated by a physical simulator, and a physically
inspired model (e.g., a contact model between a suction vacuum cup and object)
was used as a grasp quality evaluation metric to annotate the synthesized
images. However, this kind of contact model is complicated and requires
parameter identification by experiments to ensure real world performance. In
addition, previous studies have not considered manipulator reachability such as
when a grasp configuration with high grasp quality is unable to reach the
target due to collisions or the physical limitations of the robot. In this
study, we propose an intuitive geometric analytic-based grasp quality
evaluation metric. We further incorporate a reachability evaluation metric. We
annotate the pixel-wise grasp quality and reachability by the proposed
evaluation metric on synthesized images in a simulator to train an
auto-encoder--decoder called suction graspability U-Net++ (SG-U-Net++).
Experiment results show that our intuitive grasp quality evaluation metric is
competitive with a physically-inspired metric. Learning the reachability helps
to reduce motion planning computation time by removing obviously unreachable
candidates. The system achieves an overall picking speed of 560 PPH (pieces per
hour).Comment: 18 pages, 2 tables, 7 figure
Ordered phase and phase transitions in the three-dimensional generalized six-state clock model
We study the three-dimensional generalized six-state clock model at values of
the energy parameters, at which the system is considered to have the same
behavior as the stacked triangular antiferromagnetic Ising model and the
three-state antiferromagnetic Potts model. First, we investigate ordered phases
by using the Monte Carlo twist method (MCTM). We confirmed the existence of an
incompletely ordered phase (IOP1) at intermediate temperature, besides the
completely ordered phase (COP) at low-temperature. In this intermediate phase,
two neighboring states of the six-state model mix, while one of them is
selected in the low temperature phase. We examine the fluctuation the mixing
rate of the two states in IOP1 and clarify that the mixing rate is very stable
around 1:1.
The high temperature phase transition is investigated by using
non-equilibrium relaxation method (NERM). We estimate the critical exponents
beta=0.34(1) and nu=0.66(4). These values are consistent with the 3D-XY
universality class. The low temperature phase transition is found to be of
first-order by using MCTM and the finite-size-scaling analysis
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