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Fast Distributed Agreements and safety-critical scenarios in VANETs

Gerard Le Lann
2017 2017 International Conference on Computing, Networking and Communications (ICNC)  
The Fast Distributed Agreement (FastDA) problem, as well as solutions to the longitudinal and the lateral instantiations of FastDA, are examined and informally specified.  ...  Analytical expressions of worst-case time bounds for reaching agreement are provided.  ...  Our focus is on SC scenarios where the Fast Distributed Agreement (FastDA) problem arises. SC events instantiated as SC messages received by vehicles may be (i) concurrent, (ii) conflicting.  ... 
doi:10.1109/iccnc.2017.7876127 dblp:conf/iccnc/Lann17 fatcat:53ovhomy4zbetggltviipwhbfu

Fast byzantine agreement

Nicolas Braud-Santoni, Rachid Guerraoui, Florian Huc
2013 Proceedings of the 2013 ACM symposium on Principles of distributed computing - PODC '13  
is paper presents the first probabilistic Byzantine Agreement algorithm whose communication and time complexities are poly-logarithmic.  ...  So far, the most effective probabilistic Byzantine Agreement algorithm had communication complexityÕ n and time complexityÕ (1).  ...  CONCLUSION We propose an asynchronous almost-everywhere to everywhere agreement protocol with poly-logarithmic complexity, which yields the first poly-logarithmic algorithm for Byzantine Agreement.  ... 
doi:10.1145/2484239.2484243 dblp:conf/podc/Braud-SantoniGH13 fatcat:4qmakhm4ofcbdbxams43dabwge

Quality Control of Azimuthal Shear Wave Anisotropy Analysis

Marek Kozak, Mirka Mozak, Jefferson Williams
2012 ASEG Extended Abstracts  
Good agreement will yield a robust fast shear wave stress direction. -Computation of fast shear azimuth standard deviation curve based on the angular energy distribution data.  ...  This allows one to estimate standard deviation and measure correlation of the angular energy distributions. Other quality measures are also available. words, their agreement is not a coincidence.  ... 
doi:10.1071/aseg2012ab366 fatcat:njjwd7sulfefxpx5iqw5nbmxxu

Characterization of Fast Ion Absorption of the High Harmonic Fast Wave in the National Spherical Torus Experiment

A. L. Rosenberg
2003 AIP Conference Proceedings  
In agreement with modeling, these experiments find the RF-induced fast ion tail strength and neutron rate at lower B-fields to be less enhanced, likely due to a larger β profile, which promotes greater  ...  off-axis absorption where the fast ion population is small.  ...  Future work includes attempting to gain more quantitative agreement between experiment and theory by determining how the fast ion distribution function is perturbed by RF and recalculating the neutron  ... 
doi:10.1063/1.1638024 fatcat:svj4vugx7ng6tptu6hynhp5era

Page 190 of None Vol. 110, Issue 1 [page]

1958 None  
Figures 5 and 6 present the angular distribution of the fast prongs observed in photographic plates in a SG ad + ++ 04 ; ‘4 Angular Distribution of Fast (T2 90 Mev) Protons ' rt --—-- Experimental (310  ...  A detailed kinetic-energy distribution for the fast protons is not easy to deduce from photographic-plate data.  ... 

Synthetic Fast Ion Diagnostics in Tokamaks: Comparing the Monte Carlo Test Particle Code ASCOT against Experiments

Simpp Äkäslompolo, Tain Kurki-Suonio, Sepp Sipilä, ASCO Group
2016 Fusion science and technology  
In this contribution, a variety of synthetic diagnostics for fast ions (collective Thomson scattering, neutral particle analyzer, neutron camera, infrared measurements, fast ion loss detector and activation  ...  Within the limitations of physics included in the numerical model and availability of input data from experiments, the agreement between synthetic data and measurements is found to be quite good.  ...  The cases addressed in this contribution were all concerned with fast ion distributions.  ... 
doi:10.13182/fst15-184 fatcat:7bslfuvbzfg2dknh4xleatixeu

Validation of comprehensive magnetohydrodynamic hybrid simulations for Alfvén eigenmode induced energetic particle transport in DIII-D plasmas

Y. Todo, M. A. Van Zeeland, A. Bierwage, W.W. Heidbrink, M.E. Austin
2015 Nuclear Fusion  
It is demonstrated that the temperature fluctuation profile and the phase profile are in very good agreement with the measurement, and the amplitude is also in agreement within a factor of two.  ...  The large fast ion pressure profile flattening observed experimentally is successfully reproduced by these first of a kind comprehensive simulations.  ...  In the subsequent hybrid phase, the built-up fast ion distribution destabilizes AEs leading to the relaxation of the distribution.  ... 
doi:10.1088/0029-5515/55/7/073020 fatcat:mmfskihkizcmddugtilp2dymse

Characterization and Comparison of the 10-2 SITA-Standard and Fast Algorithms

Yaniv Barkana, Erez Bakshi, Yakov Goldich, Yair Morad, Audrey Kaplan, Isaac Avni, David Zadok
2012 The Scientific World Journal  
Purpose: To compare the 10-2 SITA-standard and SITA-fast visual field programs in patients with glaucoma.  ...  Results: SITA-fast was 30% shorter than SITA-standard (5.5 ± 1.1 vs 7.9 ± 1.1 minutes, P < 0.001).  ...  The 2-tailed, paired t-test was used to compare normally distributed parameters and the Wilcoxon signed ranks test for the nonnormally distributed parameters.  ... 
doi:10.1100/2012/821802 pmid:22654632 pmcid:PMC3354663 fatcat:kkbtk4dwkfdkbmzib2pr5z5yai

Phase-space resolved measurement of 2nd harmonic ion cyclotron heating using FIDA tomography at the ASDEX Upgrade tokamak

M. Weiland, R. Bilato, B. Geiger, P.A. Schneider, G. Tardini, M. Garcia-Muñoz, F. Ryter, M. Salewski, H. Zohm
2017 Nuclear Fusion  
Recent upgrades to the FIDA (fast-ion D-alpha) diagnostic at ASDEX Upgrade allow to reconstruct the fast-ion phase space at several radial positions with decent energy and pitch resolution.  ...  Furthermore, comparisons to other fast-ion diagnostics (neutron yield and neutral particle analyzers) are discussed.  ...  This work has been carried out within the framework of the EUROfusion Consortium and has received funding from the Euratom research and training programme 2014-2018 under grant agreement No 633053.  ... 
doi:10.1088/1741-4326/aa7e0a fatcat:fn3epx6qsbdmbgcluqbdgqrfhm

Note on the CMS multiplicity distributions [article]

K. Fialkowski, R. Wit
2011 arXiv   pre-print
The agreement is reasonable. However, it seems to be difficult to improve further this agreement by tuning the parameters determining the multiple parton interactions.  ...  The CMS data on the multiplicity distributions are compared with the results from the 8.142 version of the PYTHIA MC event generator with the default tuning and realistic impact parameter profile.  ...  The energy dependence is similarly slightly too weak for the average but too fast for the scaled moments.  ... 
arXiv:1103.4472v1 fatcat:acohslv6yrds7bcma5cd6ahdhi

Impact of different confinement regimes on the two-dimensional structure of edge turbulence

J A Alonso, S J Zweben, P Carvalho, J L de Pablos, E de la Cal, C Hidalgo, T Klinger, B Ph van Milligen, R J Maqueda, M A Pedrosa, C Silva, M Spolaore (+2 others)
2006 Plasma Physics and Controlled Fusion  
LCFS 10 cm Blobs Positions Conclusions Fast camera measurements have been found to be in good agreement with HIBP and Langmuir probes in TJ-II.  ...  Inhomogeneous blob distribution in the SOL Spatial distribution of detected structures in the SOL is poloidally inhomogeneous.  ... 
doi:10.1088/0741-3335/48/12b/s44 fatcat:q2zklk52presfdnivvecgebvsa

Improved Collective Thomson Scattering measurements of fast ions at ASDEX Upgrade [article]

J. Rasmussen, S. K. Nielsen, M. Stejner, M. Salewski, A. S. Jacobsen, S. B. Korsholm, F. Leipold, F. Meo, P. K. Michelsen, D. Moseev, M. Schubert, J. Stober, G. Tardini, D. Wagner (+1 others)
2013 arXiv   pre-print
Microwave-based Collective Thomson Scattering (CTS) is well suited for reactor conditions and offers such an opportunity by providing measurements of the confined fast-ion distribution function resolved  ...  Understanding the behaviour of the confined fast ions is important in both current and future fusion experiments.  ...  This work, supported by the European Communities under the contract of Association between Euratom and DTU, was partly carried out within the framework of the European Fusion Development Agreement.  ... 
arXiv:1310.2406v1 fatcat:mydoedwqbvaw3m2spdcjdkt47i

Non-Maxwellian fast particle effects in gyrokinetic GENE simulations

A. Di Siena, T. Görler, H. Doerk, R. Bilato, J. Citrin, T. Johnson, M. Schneider, E. Poli
2018 Physics of Plasmas  
It appears that the fast ion stabilization tends to be less strong but still substantial with more realistic distributions, and this improves the quantitative power balance agreement with experiments.  ...  However, in many of the gyrokinetic codes fast ions are, for simplicity, treated as equivalent-Maxwellian-distributed particle species, although it is well known that to rigorously model highly non-thermalised  ...  This work has been carried out within the framework of the EUROfusion Consortium and has received funding from the Euratom research and training programme 2014-2018 under grant agreement No 633053.  ... 
doi:10.1063/1.5020122 fatcat:3bpclcgiprg2faoh5ipvs7j4ni

Application of a fast proton dose calculation algorithm to a thorax geometry

Pablo P. Yepes, Travis Brannan, Jessie Huang, Dragan Mirkovic, Wayne D. Newhauser, Phillip J. Taddei, Uwe Titt
2010 Radiation Measurements  
Treatment planning in proton therapy requires the calculation of absorbed dose distributions on beam shaping components and the patient anatomy.  ...  The Fast Dose Calculator, a track-repeating algorithm, has been proposed as an alternative fast and accurate dose calculation. In this work FDC is applied to a proton therapy patient thoracic anatomy.  ...  Thus, the dose distribution from FDC is in good agreement with the reference dose distribution from GEANT4. The time to process one history was 2.9 s and 0.9 ms for GEANT4 and FDC, respectively.  ... 
doi:10.1016/j.radmeas.2010.05.022 pmid:21544230 pmcid:PMC3085469 fatcat:ko4sdivrfvdntmcvd2ouedzbua

Anomalous and classical neutral beam fast ion diffusion on JET

Yu F Baranov, I Jenkins, B Alper, C D Challis, S Conroy, V Kiptily, J Ongena, S Popovichev, P Smeulders, E Surrey, K-D Zastrow
2009 Plasma Physics and Controlled Fusion  
In this paper it is demonstrated that large anomalous losses of fast ions have to be assumed in the simulations to improve agreement between experimental and simulated neutron profiles, characterized by  ...  H-Mode plasmas assuming that the fast beam ions experience no, or relatively small, anomalous diffusion (D an <<0.5m 2 /s).  ...  This work was carried out within the framework of the European Fusion Development Agreement.  ... 
doi:10.1088/0741-3335/51/4/044004 fatcat:5ionaxm45ffl5kjsjqrxvtyxci
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