59 research outputs found
Accelerating cycle expansions by dynamical conjugacy
Periodic orbit theory provides two important functions---the dynamical zeta
function and the spectral determinant for the calculation of dynamical averages
in a nonlinear system. Their cycle expansions converge rapidly when the system
is uniformly hyperbolic but greatly slowed down in the presence of
non-hyperbolicity. We find that the slow convergence can be associated with
singularities in the natural measure. A properly designed coordinate
transformation may remove these singularities and results in a dynamically
conjugate system where fast convergence is restored. The technique is
successfully demonstrated on several examples of one-dimensional maps and some
remaining challenges are discussed
Large expert-curated database for benchmarking document similarity detection in biomedical literature search
Document recommendation systems for locating relevant literature have mostly relied on methods developed a decade ago. This is largely due to the lack of a large offline gold-standard benchmark of relevant documents that cover a variety of research fields such that newly developed literature search techniques can be compared, improved and translated into practice. To overcome this bottleneck, we have established the RElevant LIterature SearcH consortium consisting of more than 1500 scientists from 84 countries, who have collectively annotated the relevance of over 180 000 PubMed-listed articles with regard to their respective seed (input) article/s. The majority of annotations were contributed by highly experienced, original authors of the seed articles. The collected data cover 76% of all unique PubMed Medical Subject Headings descriptors. No systematic biases were observed across different experience levels, research fields or time spent on annotations. More importantly, annotations of the same document pairs contributed by different scientists were highly concordant. We further show that the three representative baseline methods used to generate recommended articles for evaluation (Okapi Best Matching 25, Term Frequency-Inverse Document Frequency and PubMed Related Articles) had similar overall performances. Additionally, we found that these methods each tend to produce distinct collections of recommended articles, suggesting that a hybrid method may be required to completely capture all relevant articles. The established database server located at https://relishdb.ict.griffith.edu.au is freely available for the downloading of annotation data and the blind testing of new methods. We expect that this benchmark will be useful for stimulating the development of new powerful techniques for title and title/abstract-based search engines for relevant articles in biomedical research.Peer reviewe
Eurycoma longifolia increases sexual motivation in sexually naive male rats
Archives of Pharmacal Research216779-781APHR
Eurycoma longifolia JACK and orientation activities in sexually experienced male rats
Biological and Pharmaceutical Bulletin212153-155BPBL
Effects of Eurycoma longifolia Jack on sexual behaviour of male rats
Archives of Pharmacal Research206656-658APHR
Eurycoma longifolia Jack Enhances Libido in Sexually Experienced Male Rats
Experimental Animals464287-290JIDO
Evaluation of pendiculation activities in male rats after oral administration of Eurycoma longifolia Jack
10.1076/phbi.36.2.144.4597Pharmaceutical Biology362144-146PHBI
Simultaneous tracking of cell nuclei and conduit parameters from time-lapse confocal microscopy images
10.1109/ISBI.2011.5872572Proceedings - International Symposium on Biomedical Imaging1011-101
A Bayesian filtering approach to incorporate 2D/3D time-lapse confocal images for tracking angiogenic sprouting cells interacting with the gel matrix
10.1016/j.media.2013.10.008Medical Image Analysis181211-227MIAE
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