6,110 research outputs found
Enhancing Energy Production with Exascale HPC Methods
High Performance Computing (HPC) resources have become the key actor for achieving more ambitious challenges in many disciplines. In this step beyond, an explosion on the available parallelism and the use of special purpose
processors are crucial. With such a goal, the HPC4E project applies new exascale HPC techniques to energy industry simulations, customizing them if necessary, and going beyond the state-of-the-art in the required HPC exascale
simulations for different energy sources. In this paper, a general overview of these methods is presented as well as some specific preliminary results.The research leading to these results has received funding from the European Union's Horizon 2020 Programme (2014-2020) under the HPC4E Project (www.hpc4e.eu), grant agreement n° 689772, the Spanish Ministry of
Economy and Competitiveness under the CODEC2 project (TIN2015-63562-R), and
from the Brazilian Ministry of Science, Technology and Innovation through Rede
Nacional de Pesquisa (RNP). Computer time on Endeavour cluster is provided by the
Intel Corporation, which enabled us to obtain the presented experimental results in
uncertainty quantification in seismic imagingPostprint (author's final draft
Addressing the Challenges in Federating Edge Resources
This book chapter considers how Edge deployments can be brought to bear in a
global context by federating them across multiple geographic regions to create
a global Edge-based fabric that decentralizes data center computation. This is
currently impractical, not only because of technical challenges, but is also
shrouded by social, legal and geopolitical issues. In this chapter, we discuss
two key challenges - networking and management in federating Edge deployments.
Additionally, we consider resource and modeling challenges that will need to be
addressed for a federated Edge.Comment: Book Chapter accepted to the Fog and Edge Computing: Principles and
Paradigms; Editors Buyya, Sriram
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Evaluating the resilience and security of boundaryless, evolving socio-technical Systems of Systems
ItzĂŻ (version 17.1):an open-source, distributed GIS model for dynamic flood simulation
Worldwide, floods are acknowledged as one of the most
destructive hazards. In human-dominated environments, their negative impacts
are ascribed not only to the increase in frequency and intensity of floods
but also to a strong feedback between the hydrological cycle and
anthropogenic development. In order to advance a more comprehensive
understanding of this complex interaction, this paper presents the
development of a new open-source tool named <q>ItzĂŻ</q> that enables the
2-D numerical modelling of rainfall–runoff processes and surface flows
integrated with the open-source geographic information system (GIS) software
known as GRASS. Therefore, it takes advantage of the ability given by GIS
environments to handle datasets with variations in both temporal and spatial
resolutions. Furthermore, the presented numerical tool can handle datasets
from different sources with varied spatial resolutions, facilitating the
preparation and management of input and forcing data. This ability reduces
the preprocessing time usually required by other models. ItzĂŻ
uses a simplified form of the shallow water equations, the damped partial
inertia equation, for the resolution of surface flows, and the Green–Ampt
model for the infiltration. The source code is now publicly available online,
along with complete documentation. The numerical model is verified against
three different tests cases: firstly, a comparison with an analytic solution
of the shallow water equations is introduced; secondly, a hypothetical
flooding event in an urban area is implemented, where results are compared to
those from an established model using a similar approach; and lastly, the
reproduction of a real inundation event that occurred in the city of Kingston
upon Hull, UK, in June 2007, is presented. The numerical approach proved
its ability at reproducing the analytic and synthetic test cases. Moreover,
simulation results of the real flood event showed its suitability at
identifying areas affected by flooding, which were verified against those
recorded after the event by local authorities
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