7,232 research outputs found
Silicon containing electroconductive polymers and structures made therefrom
An electropolymerized film comprised of polymers and copolymers of a monomer is formed on the surface of an anode. The finished structures have superior electrical and mechanical properties for use in applications such as electrostatic dissipation and for the reduction of the radar cross section of advanced aircraft
The weights of closed subgroups of a locally compact group
Let be an infinite locally compact group and a cardinal
satisfying for the weight of . It is
shown that there is a closed subgroup of with . Sample
consequences are:
(1) Every infinite compact group contains an infinite closed metric subgroup.
(2) For a locally compact group and a cardinal satisfying
\aleph_0\le\aleph\le \lw(G), where \lw(G) is the local weight of , there
are either no infinite compact subgroups at all or there is a compact subgroup
of with .
(3) For an infinite abelian group there exists a properly ascending
family of locally quasiconvex group topologies on , say,
(\tau_\aleph)_{\aleph_0\le \aleph\le \card(G)}, such that
.
Items (2) and (3) are shown in Section 5
Nonmeasurable subgroups of compact groups
In 1985 S.~Saeki and K.~Stromberg published the following question: {\it Does
every infinite compact group have a subgroup which is not Haar measurable?} An
affirmative answer is given for all compact groups with the exception of some
metric profinite groups known as strongly complete. In this spirit it is also
shown that every compact group contains a non-Borel subgroup
Ab initio study of semiconducting carbon nanotubes adsorbed on the Si(100) surface: diameter- and registration-dependent atomic configurations and electronic properties
We present a first-principles study of semiconducting carbon nanotubes
adsorbed on the unpassivated Si(100) surface. We have found metallicity for the
combined system caused by n-doping of the silicon slab representing the surface
by the SWNT. We confirm this metallicity for nanotubes of different diameters
and chiral angles, and find the effect to be independent of the orientation of
the nanotubes on the surface. We also present adsorption energetics and
configurations which show semiconducting SWNTs farther apart from the surface
and transferring less charge, in comparison with metallic SWNTs of similar
diameter.Comment: Replaces old (Jan 2006) version; more supporting material. 11 pages,
8 figures, 7 table
Facial Expression Recognition from World Wild Web
Recognizing facial expression in a wild setting has remained a challenging
task in computer vision. The World Wide Web is a good source of facial images
which most of them are captured in uncontrolled conditions. In fact, the
Internet is a Word Wild Web of facial images with expressions. This paper
presents the results of a new study on collecting, annotating, and analyzing
wild facial expressions from the web. Three search engines were queried using
1250 emotion related keywords in six different languages and the retrieved
images were mapped by two annotators to six basic expressions and neutral. Deep
neural networks and noise modeling were used in three different training
scenarios to find how accurately facial expressions can be recognized when
trained on noisy images collected from the web using query terms (e.g. happy
face, laughing man, etc)? The results of our experiments show that deep neural
networks can recognize wild facial expressions with an accuracy of 82.12%
Complement activation and protein adsorption by carbon nanotubes
As a first step to validate the use of carbon nanotubes as novel vaccine or drug delivery devices, their interaction with a part of the human immune system, complement, has been explored. Haemolytic assays were conducted to investigate the activation of the human serum complement system via the classical and alternative pathways. Western blot and sodium dodecyl sulphate-polyacrylamide gel electrophoresis (SDS-PAGE) techniques were used to elucidate the mechanism of activation of complement via the classical pathway, and to analyse the interaction of complement and other plasma proteins with carbon nanotubes. We report for the first time that carbon nanotubes activate human complement via both classical and alternative pathways. We conclude that complement activation by nanotubes is consistent with reported adjuvant effects, and might also in various circumstances promote damaging effects of excessive complement activation, such as inflammation and granuloma formation. C1q binds directly to carbon nanotubes. Protein binding to carbon nanotubes is highly selective, since out of the many different proteins in plasma, very few bind to the carbon nanotubes. Fibrinogen and apolipoproteins (AI, AIV and CIII) were the proteins that bound to carbon nanotubes in greatest quantit
- …