6,169 research outputs found
Heating-compensated constant-temperature tunneling measurements on stacks of BiSrCaCuO intrinsic junctions
In highly anisotropic layered cuprates such as BiSrCaCuO
tunneling measurements on a stack of intrinsic junctions in a high-bias range
are often susceptible to self-heating. In this study we monitored the
temperature variation of a stack ("sample stack") of intrinsic junctions by
measuring the resistance change of a nearby stack ("thermometer stack") of
intrinsic junctions, which was strongly thermal-coupled to the sample stack
through a common Au electrode. We then adopted a
proportional-integral-derivative scheme incorporated with a substrate-holder
heater to compensate the temperature variation. This in-situ temperature
monitoring and controlling technique allows one to get rid of spurious
tunneling effects arising from the self-heating in a high bias range.Comment: 3 pages, 3 figure
Collective Josephson vortex dynamics in a finite number of intrinsic Josephson junctions
We report the experimental confirmation of the collective transverse plasma
modes excited by the Josephson vortex lattice in stacks of intrinsic Josephson
junctions in BiSrCaCuO single crystals. The
excitation was confirmed by analyzing the temperature () and magnetic field
() dependencies of the multiple sub-branches in the Josephson-vortex-flow
region of the current-voltage characteristics of the system. In the near-static
Josephson vortex state for a low tunneling bias current, pronounced
magnetoresistance oscillations were observed, which represented a
triangular-lattice vortex configuration along the c axis. In the dynamic vortex
state in a sufficiently high magnetic field and for a high bias current,
splitting of a single Josephson vortex-flow branch into multiple sub-branches
was observed. Detailed examination of the sub-branches for varying field
reveals that sub-branches represent the different modes of the Josephson-vortex
lattice along the c axis, with varied configuration from a triangular to a
rectangular lattices. These multiple sub-branches merge to a single curve at a
characteristic temperature, above which no dynamical structural transitions of
the Josephson vortex lattice is expected
Association of factor XIII Val34Leu polymorphism and coronary artery disease: A meta-analysis
Background: Factor XIII plays an important role in the stabilization of the linkage between fibrins and in the pathophysiology of coronary artery disease (CAD). The association between factor XIII Val34Leu polymorphism and CAD risk remains controversial.
Methods: We conducted a meta-analysis of 36 studies involving 26,940 cases and 34,694 controls. Subgroup analyses were performed with division of data into disease (myocardial infarction [MI], CAD without MI), age, and sex.
Results: Factor XIII Val34Leu polymorphism was significantly associated with ove all CAD risk (odds ratio [OR] = 1.09, 95% confidence interval [CI] = 1.03–1.06, p = 0.004) and MI risk (OR = 1.15, 95% CI 1.07–1.25, p = 0.0003), but not with CAD without MI risk (OR = 1.00, 95% CI 0.87–1.15, p = 0.96). In the subgroup analysis by age and sex, there was no association between Val34Leu polymorphism and CAD.
Conclusions: This meta-analysis found that factor XIII Val34Leu polymorphism was associated with CAD risk, especially MI, but not with CAD without MI. In addition, age and sex did not affect the relationship between factor XIII Val34Leu polymorphism and CAD risk.
Optimal Supply Chain Formation Using Manufacturers’ Negotiation in the Environment that the Sub-Contracts are Allowable
Dual Precision Deep Neural Network
On-line Precision scalability of the deep neural networks(DNNs) is a critical
feature to support accuracy and complexity trade-off during the DNN inference.
In this paper, we propose dual-precision DNN that includes two different
precision modes in a single model, thereby supporting an on-line precision
switch without re-training. The proposed two-phase training process optimizes
both low- and high-precision modes.Comment: 5 pages, 4 figures, 2 table
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