660 research outputs found
Improving the performance of inorganic-organic hybrid photovoltaic devices by uniform ordering of ZnO nanorods and near-atmospheric pressure nitrogen plasma treatment
An imaging algorithm of objects embedded in a lossy-dispersive medium for subsurface radar-data processing
A Reconstruction of Context-Dependent Document Processing In SGML
SGML achieves a certain degree of context-dependent document processing through attributes and linking. These mechanisms are deficient in several respects. To address these deficiencies we propose augmenting SGML\u27s LINK and ATTLISTconstructs with two new mechanisms, coordination and (rule-based) attribution. The latter can be used to specify the result of context-dependent processing in a uniform fashion while considerably increasing SGML\u27s expressive power. We illustrate this enhanced power by sketching a specification of (the result of) document layout that can be encoded in SGML augmented with coordination and attribution
Metabolism of [18F]fluorodiacylglycerol in Rat Hippocampal Neurons in Vitro
開始ページ、終了ページ: 冊子体のページ付
High contrast experiment of an AO-free coronagraph with a checkerboard pupil mask
A high contrast coronagraph is expected to provide one of the promising ways
to directly observe extra-solar planets. We present the newest results of our
laboratory experiment investigating "rigid" coronagraph with a binary shaped
checkerboard pupil mask, which should offer a highly stable solution for
telescopes without adaptive optics (AO) for wavefront correction in space
missions. The primary aim of this work was to study the stability of the
coronagraph, and to demonstrate its performance without adaptive wavefront
correction. Estimation of both the raw contrast and the gain of the point
spread function (PSF) subtraction were needed. The limiting factor of the
contrast was also important. A binary shaped pupil mask of a checkerboard type
has been designed. The mask, consisting of an aluminum film on a glass
substrate, was manufactured using nano-fabrication techniques with electron
beam lithography. Careful evaluation of coronagraphic performance, including
PSF subtraction, was carried out in air using the developed mask. A contrast of
was achieved for the raw coronagraphic image by areal
averaging of all of the observed dark regions. Following PSF subtraction, the
contrast reached . Speckles were a major limiting factor
throughout the dark regions of both the raw image and the PSF subtracted image.
A rigid coronagraph with PSF subtraction without AO is a useful method to
achieve high contrast observations. Applications of a rigid coronagraph to a
Space Infrared telescope for Cosmology and Astrophysics (SPICA) and other
platforms are discussed.Comment: 13 pages, 6 figure
Resurrection of a Bull by Cloning from Organs Frozen without Cryoprotectant in a −80°C Freezer for a Decade
Frozen animal tissues without cryoprotectant have been thought to be inappropriate for use as a nuclear donor for somatic cell nuclear transfer (SCNT). We report the cloning of a bull using cells retrieved from testicles that had been taken from a dead animal and frozen without cryoprotectant in a −80°C freezer for 10 years. We obtained live cells from defrosted pieces of the spermatic cords of frozen testicles. The cells proliferated actively in culture and were apparently normal. We transferred 16 SCNT embryos from these cells into 16 synchronized recipient animals. We obtained five pregnancies and four cloned calves developed to term. Our results indicate that complete genome sets are maintained in mammalian organs even after long-term frozen-storage without cryoprotectant, and that live clones can be produced from the recovered cells
Demonstration of cathepsins B, H and L in xenografts of normal and Duchenne-muscular-dystrophy muscles transplanted into nude mice
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