Filters








306,779 Hits in 9.0 sec

Simulations of large-scale WiFi-based wireless networks: Interdisciplinary challenges and applications

Maziar Nekovee, Radhika S. Saksena
2010 Future generations computer systems  
Furthermore, adhoc grids composed of wirelessly networked portable devices are emerging as a new paradigm in grid computing.  ...  In this paper we review computational and algorithmic challenges of high-fidelity simulations of such WiFi-based wireless communication and computing networks, including scalable topology maintenance,  ...  He thanks the Centre for Computational Science at UCL for hospitality and his colleagues at BT's Mobility Research Centre for stimulating discussions.  ... 
doi:10.1016/j.future.2008.05.007 fatcat:etyoregc6zfthap6flnlli36ba

WLCG scale testing during CMS data challenges

O Gutsche, C Hajdu
2008 Journal of Physics, Conference Series  
During the 2006 challenge, CMS set its goal to test the infrastructure at a scale of 50,000 user jobs per day using CRAB.  ...  As a preparation for data taking, CMS tests its computing model during dedicated data challenges.  ...  The presented tests used infrastructures from several GRID middlewares and tools and services developed and provided by CMS who we want to thank for their help, support and contributions.  ... 
doi:10.1088/1742-6596/119/6/062033 fatcat:do4frrxt3zc4tnlzdk4qph7m7e

Challenges of Scaling Algebraic Multigrid Across Modern Multicore Architectures

Allison H. Baker, Todd Gamblin, Martin Schulz, Ulrike Meier Yang
2011 2011 IEEE International Parallel & Distributed Processing Symposium  
Algebraic multigrid (AMG) is a popular solver for large-scale scientific computing and an essential component of many simulation codes.  ...  However, when executed on modern multicore architectures, we face new challenges that can significantly deteriorate AMG's performance.  ...  In the setup phase, the coarse grids, interpolation operators, and coarse-grid operators must all be determined for each of the coarse-grid levels.  ... 
doi:10.1109/ipdps.2011.35 dblp:conf/ipps/BakerGSY11 fatcat:vopsrrkjcjcslczrq4ltj573ue

Resilient Metro-scale Smart Structures: Challenges & Future Directions

Mike Burmester, Jorge Munilla
2016 Proceedings of the International Conference on Internet of Things and Big Data  
To illustrate the challenges of capturing resilience we consider two very different applications: supply chain logistics and smart grids.  ...  In this paper we consider the challenges for securing metro-scale smart structures.  ...  However for grids that are latency sensitive, availability and integrity become the primary goals, with confidentiality often a secondary goal.  ... 
doi:10.5220/0005922501370147 dblp:conf/iotbd/BurmesterM16 fatcat:teo4xtfbczbrndocp5rueynof4

Scientific Challenges of Convective-Scale Numerical Weather Prediction

Jun-Ichi Yano, Michał Z. Ziemiański, Mike Cullen, Piet Termonia, Jeanette Onvlee, Lisa Bengtsson, Alberto Carrassi, Richard Davy, Anna Deluca, Suzanne L. Gray, Víctor Homar, Martin Köhler (+5 others)
2018 Bulletin of The American Meteorological Society - (BAMS)  
The extent of the challenge at the convective scale becomes apparent only 89 when seeing all of the challenges together. 90 The practical issues faced by European weather services may be understood by  ...  the UK uses a grid spacing of 1.5 km, and 63 MeteoSwiss runs the COSMO (Consortium for Small-scale Modelling) model with a grid 64 spacing of 1.1 km. 65 NWP capacity has reached a critical threshold: NWP  ...  scales does not Overall, we face challenges for subgrid-scale parameterizations from two sides.  ... 
doi:10.1175/bams-d-17-0125.1 fatcat:nom223o3tngblpvcjcyp5g6qu4

Software challenges in extreme scale systems

Vivek Sarkar, William Harrod, Allan E Snavely
2009 Journal of Physics, Conference Series  
Carlson is a member of the research staff at the IDA Center for Computing Sciences where, since 1990, his focus has been on applications and system tools for large-scale parallel and distributed computers  ...  Dr His research areas include advanced VLSI and nano technologies, non von Neumann models of programming and execution, parallel algorithms and applications, and their impact on massively parallel computer  ...  Attacking all three simultaneously is the grand challenge of extreme scale programming.  ... 
doi:10.1088/1742-6596/180/1/012045 fatcat:iukutry2dvbitfdh6ng7kgz564

The scaling challenge

Prashant Saxena, Noel Menezes, Pasquale Cocchini, Desmond A. Kirkpatrick
2003 Proceedings of the 2003 international symposium on Physical design - ISPD '03  
We present the results of scaling studies in the context of typical block-level wiring distributions, and study the impact of the identified trends on the post-RTL design process.  ...  Finally, we suggest CbC approaches to tackle the new synthesis and layout challenges identified in this paper.  ...  The scaling trends of the model parameters (including the empirical σ) were computed using these calibration results and used to produce new sets of parameters for speculative process technologies nodes  ... 
doi:10.1145/640012.640014 fatcat:nc52vj4sbncgjdsddnkrbwns2i

The scaling challenge

Prashant Saxena, Noel Menezes, Pasquale Cocchini, Desmond A. Kirkpatrick
2003 Proceedings of the 2003 international symposium on Physical design - ISPD '03  
We present the results of scaling studies in the context of typical block-level wiring distributions, and study the impact of the identified trends on the post-RTL design process.  ...  Finally, we suggest CbC approaches to tackle the new synthesis and layout challenges identified in this paper.  ...  The scaling trends of the model parameters (including the empirical σ) were computed using these calibration results and used to produce new sets of parameters for speculative process technologies nodes  ... 
doi:10.1145/640000.640014 dblp:conf/ispd/SaxenaMCK03 fatcat:kc7ebjlnynaizcxsinn4q3k5dm

Kilometer-scale climate models: Prospects and challenges

Christoph Schär, Oliver Fuhrer, Andrea Arteaga, Nikolina Ban, Christophe Charpilloz, Salvatore Di Girolamo, Laureline Hentgen, Torsten Hoefler, Xavier Lapillonne, David Leutwyler, Katherine Osterried, Davide Panosetti (+6 others)
2019 Bulletin of The American Meteorological Society - (BAMS)  
Rather, repeating the simulation and conducting online analysis will become more efficient. A prototype of this methodology is presented.  ...  Currently major efforts are underway toward refining the horizontal resolution (or grid spacing) of climate models to about 1 km, using both global and regional climate models (GCMs and RCMs).  ...  Some of this work was supported by the Swiss National Science Foundation under Sinergia Grant CRSII2 154486/1 crCLIM, and several projects under the Swiss Platform for Advanced Scientific Computing (PASC  ... 
doi:10.1175/bams-d-18-0167.1 fatcat:3wefzc5qrjeqrbhhk3qeueefmy

OVERCOMING ENGINEERING CHALLENGES OF PROVIDING AN EFFECTIVE USER INTERFACE TO A LARGE SCALE DISTRIBUTED SYNTHETIC ENVIRONMENT ON THE US TERAGRID: A SYSTEMS ENGINEERING SUCCESS STORY

Roy S. Kalawsky
2017 Insight  
Porter of Manchester Computing for his invaluable assistance regarding the RealityGrid computational steering framework.  ...  of Oxford, Loughborough University, Edinburgh Parallel Computing Centre and Imperial College).  ...  The RealityGrid Steerer provides a visual front-end to all of the Grid-based computational steering (Left).  ... 
doi:10.1002/inst.12152 fatcat:ombtggoqsvdpbaczic6at6ea3q

Modelling Freshwater Resources at the Global Scale: Challenges and Prospects [chapter]

Petra Döll, Hervé Douville, Andreas Güntner, Hannes Müller Schmied, Yoshihide Wada
2016 Space Sciences Series of ISSI  
Quantification of spatially and temporally resolved water flows and water storage variations for all land areas of the globe is required to assess water resources, water scarcity and flood hazards, and  ...  This quantification is done with the help of global hydrological models (GHMs). What are the challenges and prospects in the development and application of GHMs?  ...  In addition, we are thankful for the helpful comments of an anonymous reviewer.  ... 
doi:10.1007/978-3-319-32449-4_2 fatcat:7jkgf35gbne7fk4kmta34zubfa

A New Challenge: Detection of Small-Scale Falling Rocks on Transportation Roads in Open-Pit Mines

Tiandong Shi, Deyun Zhong, Lin Bi
2021 Sensors  
Experimental results show that the method can detect rocks with a size of 20–30 cm at a distance of 40 m in front of the vehicle, and it takes only 0.3 s on an ordinary personal computer (PC).  ...  This will be a new challenge: rough road, rocks of small size and irregular shape, long detection distance, etc. This paper presents a detection method based on light detection and ranging (lidar).  ...  We also thank the reviewers for their comments and suggestions to improve the quality of the paper. Conflicts of Interest: The authors declare no conflict of interest.  ... 
doi:10.3390/s21103548 pmid:34069730 fatcat:vo5ihcq6vjhp3ni2vj3cmo3esy

Opportunities and Challenges in Scaling

Hidetami Yaegashi, Kenichi Oyama, Shoichi Yamauchi, Arisa Hara, Sakurako Natori, Masatoshi Yamato
2014 Journal of Photopolymer Science and Technology (Fotoporima Konwakai shi)  
On the other hand, Gridded Design Rule (GDR) concept with single directional layout (1D layout) [4] extended the down-scaling with 193-immersion furthermore and relieved the process variation and process  ...  We have studied this SAMP from several aspects, which are scaling capability, mitigation of process complexity, pattern fidelity, affordability and so on.  ...  In the above ways, ALD is becoming essential in a wide range of SAMP applications.  ... 
doi:10.2494/photopolymer.27.731 fatcat:tkvcx47uvvhkxaa75i4pfmyjfu

I/O performance challenges at leadership scale

Samuel Lang, Philip Carns, Robert Latham, Robert Ross, Kevin Harms, William Allcock
2009 Proceedings of the Conference on High Performance Computing Networking, Storage and Analysis - SC '09  
In this paper we present a case study of the I/O challenges to performance and scalability on Intrepid, the IBM Blue Gene/P system at the Argonne Leadership Computing Facility.  ...  We show that Intrepid's file and storage system sustain high performance under varying workloads as the applications scale with the number of processes.  ...  This research used resources of the Argonne Leadership Computing Facility at Argonne National Laboratory, which is supported by the Office of Science of the U.S.  ... 
doi:10.1145/1654059.1654100 dblp:conf/sc/LangCLRHA09 fatcat:ztzndu4sivgbvctctnbkcstnaa

Challenges in dependable internet-scale stream processing

Peter Pietzuch
2008 Proceedings of the 2nd workshop on Dependable distributed data management - SDDDM '08  
To build such a system, we need to address a set of challenges and, in particular, rethink what dependability means in this context: it is infeasible to guarantee perfect data processing at a global scale  ...  We briefly describe one such model to achieve a dependable Internet-scale stream processing service.  ...  However, the scale of an Internet-wide system poses substantial challenges when it comes to providing a dependable service.  ... 
doi:10.1145/1435523.1435528 fatcat:ubtnosrwhrgzrarbkkpb6kheai
« Previous Showing results 1 — 15 out of 306,779 results