20,975 research outputs found
Strain arrestor plate for mounting rigid insulating tiles
Plate is made of material having coefficient to thermal expansion similar to that of insulating material. Although plate may be formed from appropriate alloy, it has been found that a combination of graphite fibers in epoxy resin is satisfactory and much lighter in weight
The role of microtubule movement in bidirectional organelle transport
We study the role of microtubule movement in bidirectional organelle
transport in Drosophila S2 cells and show that EGFP-tagged peroxisomes in cells
serve as sensitive probes of motor induced, noisy cytoskeletal motions.
Multiple peroxisomes move in unison over large time windows and show
correlations with microtubule tip positions, indicating rapid microtubule
fluctuations in the longitudinal direction. We report the first high-resolution
measurement of longitudinal microtubule fluctuations performed by tracing such
pairs of co-moving peroxisomes. The resulting picture shows that
motor-dependent longitudinal microtubule oscillations contribute significantly
to cargo movement along microtubules. Thus, contrary to the conventional view,
organelle transport cannot be described solely in terms of cargo movement along
stationary microtubule tracks, but instead includes a strong contribution from
the movement of the tracks.Comment: 24 pages, 5 figure
Likelihood inference for particle location in fluorescence microscopy
We introduce a procedure to automatically count and locate the fluorescent
particles in a microscopy image. Our procedure employs an approximate
likelihood estimator derived from a Poisson random field model for photon
emission. Estimates of standard errors are generated for each image along with
the parameter estimates, and the number of particles in the image is determined
using an information criterion and likelihood ratio tests. Realistic
simulations show that our procedure is robust and that it leads to accurate
estimates, both of parameters and of standard errors. This approach improves on
previous ad hoc least squares procedures by giving a more explicit stochastic
model for certain fluorescence images and by employing a consistent framework
for analysis.Comment: Published in at http://dx.doi.org/10.1214/09-AOAS299 the Annals of
Applied Statistics (http://www.imstat.org/aoas/) by the Institute of
Mathematical Statistics (http://www.imstat.org
Türkçe cümlelerin kural tabanlı bağlılık analizi
Bu makalede, Türkçe cümlelerin kural tabanlı bağlılık analizi yöntemi ile ayrıştırılmaları sonucunda elde edilen başarım sunulmaktadır. Çalışma, test verisi olarak kullanılan ODTÜ-Sabancı Ağaç Yapılı Derlemi'nin bütünü üzerindeki ilk kural tabanlı sonuçları içermektedir. Uygulanan ayrıştırma algoritması ve kural yapıları detaylı olarak verilmiştir. Sonuçlar Türkçe'nin Bağlılık Analizi konusunda yapılacak çalışmalara temel olma niteliğindedir
Clustering the information space using top-ranking sentences : a study of user interaction
By considering sentences selected by a query-biased sentence extraction model from the top-retrieved documents, we create a personalised information space which is characterised by the presence of search terms. We cluster this information space, and enable searchers to interact with the resulting clusters. In order to examine whether users can recognise, and benefit from, the clustered organisation, we compare user interaction and performance between an actual clustering and a pseudo-clustering of the information space for completing information seeking tasks. The results provide evidence for the utility and meaningfulness of the clustered organisation
Out! : Om Dansk Tennis Club og tennisspilleren Leif Rovsing
Out-standing! Danish Tennis Club and the Tennis Player Leif RovsingOn April 13, 1917 the Danish newspaper B.T. published an article about the nationally renowned Danish tennis player, Leif Rovsing, who was planning to build a magnificent tennis hall. Personally funding the project, he referred to the tennis hall as a ‘World-Sports-Establishment’ to be built on land he had found close to Copenhagen. On May 5, 1917 the Danish Football Association (DBU) excluded Rovsing from all clubs under their auspices and banned him from participating in all Danish tournaments due to “presumed homosexuality”. This was the starting point for Rovsing to realise the dream he had described in B.T. In cooperation with architect Henry Madsen he built the out-standing tennis hall, Dansk Tennis Club. From an architectural point of view, the 43,5 m long and 23,5 m wide tennis hall is an original piece of sports architecture worldwide, with its smallmuntined windows, providing the hall with an intake of daylight, which sheds a soft parallel light over the courts without blinding the players. The hall also came into being with a gentleman’s study, plush sofas, china over the doors, and wall decorations from Egypt and Bali. It is these unexpected juxtapositions that made Dansk Tennis Club so unusual at the time – and to this day
Inducing a Semantically Annotated Lexicon via EM-Based Clustering
We present a technique for automatic induction of slot annotations for
subcategorization frames, based on induction of hidden classes in the EM
framework of statistical estimation. The models are empirically evalutated by a
general decision test. Induction of slot labeling for subcategorization frames
is accomplished by a further application of EM, and applied experimentally on
frame observations derived from parsing large corpora. We outline an
interpretation of the learned representations as theoretical-linguistic
decompositional lexical entries.Comment: 8 pages, uses colacl.sty. Proceedings of the 37th Annual Meeting of
the ACL, 199
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