131,831 research outputs found
Canada, waterfall, Baffin Island
No full text"Cataracts on the northeastern shore of Philpot Bay; height about 250 feet" Caption taken from Soper, J. D. (1936). The Lake Harbour Region, Baffin Island. Geographical Review, 26(3), 435.A series of veil-like cataracts descending the face of a cliff about 250 feet high, on the northeast shore of the Philpot bay
Dataset for full scale measurements of train underbody flows and track forces
No full textData to recreate figures for the associated article:
Soper, D. et al (2017). Full scale measurements of train underbody flows and track forces. Journal of Wind Engineering and Industrial Aerodynamics, 251-264.</span
Collins-Soper kernel for TMD evolution from lattice QCD
No full text© 2020 authors. Published by the American Physical Society. The Collins-Soper kernel relates transverse momentum-dependent parton distribution functions (TMDPDFs) at different energy scales. For small parton transverse momentum qT∼ΛQCD, this kernel is nonperturbative and can only be determined with controlled uncertainties through experiment or first-principles calculations. This work presents the first exploratory determination of the Collins-Soper kernel using the lattice formulation of quantum chromodynamics. In a quenched calculation, the Nf=0 kernel is determined at scales in the range 250 MeV<qT<2 GeV, and an analysis of the remaining systematic uncertainties is undertaken
Measurement of the polar-angle distribution of leptons from W boson decay as a function of the W transverse momentum in pp[over ¯] collisions at sqrt[s]=1.8 TeV
No full textWe present a measurement of the polar-angle distribution of leptons from W boson decay, as a function of the W transverse momentum. The measurement uses an 80±4 pb-1 sample of pp̅ collisions at sqrt[s]=1.8 TeV collected by the CDF detector and includes data from both the W→e+ν and W→μ+ν decay channels. We fit the W boson transverse mass distribution to a set of templates from a Monte Carlo event generator and detector simulation in several ranges of the W transverse momentum. The measurement agrees with the standard model expectation, whereby the ratio of longitudinally to transversely polarized W bosons, in the Collins-Soper W rest frame, increases with the W transverse momentum at a rate of approximately 15% per 10 GeV/c
Lessons from the evaluation of the UK's NHS R&D Implementation Methods Programme
No full textBackground: Concern about the effective use of research was a major factor behind the creation
of the NHS R&D Programme in 1991. In 1994, an advisory group was established to identify
research priorities in research implementation. The Implementation Methods Programme (IMP)
flowed from this, and its commissioning group funded 36 projects. In 2000 responsibility for the
programme passed to the National Co-ordinating Centre for NHS Service Delivery and
Organisation R&D, which asked the Health Economics Research Group (HERG), Brunel University,
to conduct an evaluation in 2002. By then most projects had been completed. This evaluation was
intended to cover: the quality of outputs, lessons to be learnt about the communication strategy
and the commissioning process, and the benefits from the projects.
Methods: We adopted a wide range of quantitative and qualitative methods. They included:
documentary analysis, interviews with key actors, questionnaires to the funded lead researchers,
questionnaires to potential users, and desk analysis.
Results: Quantitative assessment of outputs and dissemination revealed that the IMP funded useful
research projects, some of which had considerable impact against the various categories in the
HERG payback model, such as publications, further research, research training, impact on health
policy, and clinical practice.
Qualitative findings from interviews with advisory and commissioning group members indicated
that when the IMP was established, implementation research was a relatively unexplored field. This
was reflected in the understanding brought to their roles by members of the advisory and
commissioning groups, in the way priorities for research were chosen and developed, and in how
the research projects were commissioned. The ideological and methodological debates associated
with these decisions have continued among those working in this field. The need for an effective
communication strategy for the programme as a whole was particularly important. However, such
a strategy was never developed, making it difficult to establish the general influence of the IMP as a
programme.
Conclusion: Our findings about the impact of the work funded, and the difficulties faced by those
developing the IMP, have implications for the development of strategic programmes of research in
general, as well as for the development of more effective research in this field
Numerical assessment of train slipstream in tunnels: Stochastic analysis from CFD data
No full textThe train slipstream, referring to the dynamic airflow induced by moving trains, presents significant safety risks in confined environments like tunnels. While much research has focused on slipstream effects in open air, studies in tunnels are limited due to the challenges of simulating these complex aerodynamic conditions. This study aims to address these challenges by validating a CFD model based on URANS for train slipstream analysis in tunnels, comparing it against experimental data. A novel numerical statistical approach is introduced, enabling the robust characterization of slipstream phenomena using extended tunnel configurations, allowing the collection of multiple independent velocity profiles from a single simulation. The results highlight the differences in slipstream behavior between short and extended tunnels, emphasizing the impact of tunnel length on piston wind and wake development. By focusing on statistical comparisons, including ensemble mean, standard deviation, and peak distribution, the study demonstrates that the multiple-probe approach offers a robust and detailed representation of slipstream behavior. This methodology provides a general and replicable framework for characterizing slipstream flow statistics, proving especially valuable during early train and tunnel design stages where experimental data are lacking, and showing promising potential in the context of train homologation processes
Alexander Coburn Soper, Textual evidence for the secular arts of China in the period from Liu Sung through Sui (A. D. 420-618), excluding treatises on painting.
No full textPirazzoli-t'Serstevens Michèle. Alexander Coburn Soper, Textual evidence for the secular arts of China in the period from Liu Sung through Sui (A. D. 420-618), excluding treatises on painting.. In: Arts asiatiques, tome 17, 1968. pp. 230-231
MeSH term explosion and author rank improve expert recommendations
No full textInformation overload is an often-cited phenomenon that reduces the productivity, efficiency and efficacy of scientists. One challenge for scientists is to find appropriate collaborators in their research. The literature describes various solutions to the problem of expertise location, but most current approaches do not appear to be very suitable for expert recommendations in biomedical research. In this study, we present the development and initial evaluation of a vector space model-based algorithm to calculate researcher similarity using four inputs: 1) MeSH terms of publications; 2) MeSH terms and author rank; 3) exploded MeSH terms; and 4) exploded MeSH terms and author rank. We developed and evaluated the algorithm using a data set of 17,525 authors and their 22,542 papers. On average, our algorithms correctly predicted 2.5 of the top 5/10 coauthors of individual scientists. Exploded MeSH and author rank outperformed all other algorithms in accuracy, followed closely by MeSH and author rank. Our results show that the accuracy of MeSH term-based matching can be enhanced with other metadata such as author rank
Going Beyond Counting First Authors in Author Co-citation Analysis
No full textThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
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