20,975 research outputs found

    Strain arrestor plate for mounting rigid insulating tiles

    Get PDF
    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

    Get PDF
    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

    Full text link
    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

    Get PDF
    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

    Get PDF
    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

    Get PDF
    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

    Full text link
    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
    corecore