1,722,935 research outputs found
Call for proposals from US National Science Foundation for Land-Margin Ecosystems Research for 1992
No full textCall for proposals from US National Science Foundation for Land-Margin Ecosystems Research for 1992publication
Call for proposals from US National Science Foundation for Land-Margin Ecosystems Research for 1994
No full textCall for proposals from US National Science Foundation for Land-Margin Ecosystems Research for 1994publication
Information structure in Banawá, Wari’ and Karitiâna: An overview [Report to US National Science Foundation]
No full textReport to US National Science Foundation regarding project ‘Information structure and syntax in selected Amazonian languages’. Award number 034436
Global Cambrian trilobite palaeobiogeography assessed using parsimony analysis of endemicity
No full textData source: Supplementary material, http://www.geolsoc.org.uk/SUP18669Palaeobiogeographical data on Cambrian trilobites obtained during the twentieth century are combined in this paper to evaluate palaeoceanographic links through c. 30 myr, once these arthropods biomineralized. Worldwide major tectonostratigraphic units are characterized at series intervals of Cambrian time and datasets of trilobite genera (629 for Cambrian Series 2, 965 for Cambrian Series 3, and 866 for the Furongian Series) are analysed using parsimony analysis of endemicity. Special attention is given to the biogeographical observations made in microcontinents and exotic terranes. The same is done for platform-basinal transects of well-known continental margins. The parsimony analysis of endemicity analysis resulted in distinct palaeogeographical area groupings among the tectonostratigraphic units. With these groupings, several palaeobiogeographical units are distinguished, which do not necessarily fit the previously proposed biogeographical realms and provinces. Their development and spatial distributions are broadly controlled by Cambrian palaeoclimates, palaeogeographical conditions (e.g. carbonate productivity and anoxic conditions) and ocean current circulation
Experimentally validated numerical models to assess tsunami hydrodynamic force on an elevated structure
No full textRecently, the North American and Japanese authorities began combining the tsunami forces with other loads
in their structural design guidelines. Nonetheless, due to the infrequent nature of tsunamis, the provisions
may benefit from complementary insights on the qualitative and quantitative characterization of the extreme
phenomena and their interaction with coastal structures. The goal of this paper is to explore reliable and
relatively accessible computational techniques to determine pressures and forces due to tsunami-like waves
on elevated structures. Hydrodynamic flow quantities are simulated for the tsunami-like waves using an
Eulerian scheme (Shallow Water equations solved by the Finite Volume method), a Lagrangian scheme
(Navier–Stokes equations solved by the Smoothed Particle Hydrodynamics method), and a coupled Eulerian
Lagrangian modeling approach. The numerical solutions are validated against experimental data acquired from
an experimental campaign performed at the large wave flume of the Hinsdale Wave Research Laboratory,
Oregon State University. The correlations between the experimental data and the numerical solutions highlight
the advantages and disadvantages of the simulation techniques used, contributing to increase the confidence
levels in their use in determining tsunami forces for use in structural assessments and design.The first author is supported by Fundacao para a Ciencia e Tecnologia, Ph.D. grant no. SFRH/BD/137531/2018, ongoing at Lisbon University, Instituto Superior Tecnico, Civil Engineering Research and Innovation for Sustainability (CERIS).Clain and Figueiredo acknowledge the financial support by FEDER Fundo Europeu de Desenvolvimento Regional, through COMPETE 2020 -Programa Operacional Fatores de Competitividade, and the National Funds through FCT -Fundacao para a Ciencia e Tecnologia, Portugal, project no. UID/FIS/04650/2019. The authors also acknowledge the financial support provided by the FEDER, Portugal, through COMPETE 2020, and the National Funds through FCT, Portugal, project no. POCI-01-0145-FEDER-028118.Barbosa would like to acknowledge funding provide by the US National Science Foundation under the grant no. 1661315
Observational Health Data Sciences and Informatics (OHDSI): Opportunities for Observational Researchers.
Get PDFThe vision of creating accessible, reliable clinical evidence by accessing the clincial experience of hundreds of millions of patients across the globe is a reality. Observational Health Data Sciences and Informatics (OHDSI) has built on learnings from the Observational Medical Outcomes Partnership to turn methods research and insights into a suite of applications and exploration tools that move the field closer to the ultimate goal of generating evidence about all aspects of healthcare to serve the needs of patients, clinicians and all other decision-makers around the world
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe 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
Insights from the Global Lake Ecological Observatory Network (GLEON)
Get PDFThe Global Lake Ecological Observatory Network (GLEON) is a grass-roots network of people, data, and observatories. The network represents a unique effort to bring together a diverse community of scientists, engineers, information technology experts, and engaged stakeholders to understand, conserve, and predict the state of lakes and reservoirs globally. Individuals and teams in GLEON have generated a range of scientific, educational, and outreach products, from software tools to scientific publications to education modules and programs. This special issue of Inland Waters brings together a series of papers generated from the network. Here, we discuss the foundations of GLEON that have facilitated these publications and others like them in terms of network structure, research areas, and the threads that tie the network together. GLEON is underpinned by sophisticated analytical tools and a network of high-frequency in situ observatories that exploit advanced sensors and associated technologies. This approach expands the space and time domains available to inquiry and analysis of lake processes. Using team science, the network has also established a culture of collaboration, sharing, and trust. This flexible framework allows GLEON members to advance research on a range of topics and has led to an increasing number of collaborative cross-site products. Future success will depend on the network’s ability to continue to facilitate the successes of its members while also being responsive to evolving member needs, technologies, and societal priorities
Conformal leaky-wave antennas for terahertz wireless links
No full textWe explore the performance of curved leaky-wave antennas in the terahertz range. We identify two distinct regimes in whichthe far-field emission pattern varies relative to that of a planar antenna. We show that a curved multi-aperture leaky-waveantenna can be used for agile far-field beam forming, and demonstrate high-gain wireless links at gigabit-per-second data ratewith low bit error rate, in multiple directions simultaneously. This work lays the foundation for the implementation of terahertzleaky-wave structures in conformal geometries
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