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Distributed Phasers [article]

Sri Raj Paul, Karthik Murthy, Kuldeep S. Meel, John Mellor-Crummey
2016 arXiv   pre-print
To verify the correctness of our design for distributed phasers, we employ the SPIN model checker.  ...  Our design for a distributed phaser employs a pair of skip lists augmented with the ability to collect and propagate synchronization signals.  ...  In this poster, we present a highly concurrent and scalable design of distributed phasers for the APGAS model.  ... 
arXiv:1512.07305v2 fatcat:4xnup2do5rglhgro7r6h3zcphm

Hierarchical phasers for scalable synchronization and reductions in dynamic parallelism

Jun Shirako, Vivek Sarkar
2010 2010 IEEE International Symposium on Parallel & Distributed Processing (IPDPS)  
previous phase (no race condition) Introduction Introduction Habanero-Java/C • -Async-finish with Scalable Locality-Aware Work-stealing scheduler (SLAW) • Locality control with task and data distributions  ...  can vary T1 , T2 , T3 are registered on phaser ph in SIG_WAIT 8 wait T 3 T 2 T 1 Phaser Accumulators for Reduction phaser ph = new phaser(SIG_WAIT); accumulator a = new accumulator  ...  Pipeline Parallelism with Phasers  ... 
doi:10.1109/ipdps.2010.5470414 dblp:conf/ipps/ShirakoS10 fatcat:rhcppja64jfkvb7cbchswpgvya

Phaser accumulators: A new reduction construct for dynamic parallelism

J. Shirako, D. M. Peixotto, V. Sarkar, W. N. Scherer
2009 2009 IEEE International Symposium on Parallel & Distributed Processing  
We introduce phaser accumulators, a new reduction construct that meshes seamlessly with phasers to support dynamic parallelism in a phased (iterative) setting.  ...  To the best of our knowledge, no prior reduction construct supports the dynamic parallelism and asynchronous capabilities of phaser accumulators. // Construct a new Accumulator Accumulator(Phaser ph, Accumulator.Operation  ...  Opportunities for future research related to phasers include implementations on future many-core processors (such as Cyclops and Larrabee) and on distributed-memory clusters, and new compiler analyses  ... 
doi:10.1109/ipdps.2009.5161071 dblp:conf/ipps/ShirakoPSS09 fatcat:hgqpjbiwdfgr7g5ukzti775m2q

Highly Sensitive and Specific Detection of Rare Variants in Mixed Viral Populations from Massively Parallel Sequence Data

Alexander R. Macalalad, Michael C. Zody, Patrick Charlebois, Niall J. Lennon, Ruchi M. Newman, Christine M. Malboeuf, Elizabeth M. Ryan, Christian L. Boutwell, Karen A. Power, Doug E. Brackney, Kendra N. Pesko, Joshua Z. Levin (+5 others)
2012 PLoS Computational Biology  
Overall, V-Phaser achieved .97% sensitivity and .97% specificity on control read sets.  ...  To address this challenge, we describe V-Phaser, an algorithm able to recognize rare biological variants in mixed populations.  ...  To increase sensitivity, V-Phaser looks not only for variants that fall outside the distribution of errors but also for patterns of variants in phase.  ... 
doi:10.1371/journal.pcbi.1002417 pmid:22438797 pmcid:PMC3305335 fatcat:wrbuq5nbdvhuhbsdlx7znqqzqy

Spatial synchronization codes from coupled rate-phase neurons

Joseph D. Monaco, Rose M. De Guzman, Hugh T. Blair, Kechen Zhang, Daniel Bush
2019 PLoS Computational Biology  
and (2) the observed temporal segregation of phaser cells according to phase-shift direction.  ...  Our findings suggest that phaser cells may instantiate a subcortical theta-rhythmic loop of spatial feedback.  ...  distributions of each phaser (as in Fig 7B) and the supervised phase code (Fig 7C) .  ... 
doi:10.1371/journal.pcbi.1006741 fatcat:y6kbxhomjrgovgzevby3uy4aty

Spatial theta cells in competitive burst synchronization networks: Reference frames from phase codes [article]

Joseph D. Monaco, Hugh T. Blair, Kechen Zhang
2017 bioRxiv   pre-print
We computed the 522 vector cosine similarity between the phaser distributions and the target as the basis for the 523 phaser synaptic weights.  ...  Similar to the split distributions in Supplementary Figure 7 , we show distributions comparing spatial theta cell recordings not selected ('nonphaser'; n = 233) or selected ('phaser'; n = 101) as biological  ... 
doi:10.1101/211458 fatcat:yqcjndm2i5ftblexbiit5mvpde

Page 226 of Behavior Research Methods Vol. 27, Issue 2 [page]

1995 Behavior Research Methods  
A.C. and M .D.P. evinced different distributions of the more frequently used sequences, reflecting differences in their play strategies.  ...  Phaser kill rates did not increase sub¬ stantially because increases in phaser kill effectiveness (kills per phaser command) were accompanied by decreases in phaser com¬ mand rate.  ... 

Loss-Gain Equalized Reconfigurable C-Section Analog Signal Processor

Lianfeng Zou, Shulabh Gupta, Christophe Caloz
2017 IEEE transactions on microwave theory and techniques  
We present a loss-gain equalized reconfigurable phaser for dynamic radio analog signal processing (R-ASP). Such a phaser provides real-time tunable group delay response with all-pass transmission.  ...  It is expected that this phaser will find wide applications in radio analog signal processing (R-ASP) systems requiring dynamic adaptability.  ...  Section II analyzes separate loss or gain C-sections, first with distributed and then with lumped loss or gain. Section III subsequently presents a combined loss-gain pair phaser. Then Sec.  ... 
doi:10.1109/tmtt.2016.2615920 fatcat:snrjtk4ycbbszd6nmuz3ofgbxm

Dynamic deadlock verification for general barrier synchronisation

Tiago Cogumbreiro, Raymond Hu, Francisco Martins, Nobuko Yoshida
2015 Proceedings of the 20th ACM SIGPLAN Symposium on Principles and Practice of Parallel Programming - PPoPP 2015  
Armus is evaluated with three benchmark suites in local and distributed scenarios.  ...  The implementation is distributed and fault-tolerant, and can verify X10 and Java programs.  ...  Let M map phaser names p ∈ P to phasers, used to represent all phasers in the system.  ... 
doi:10.1145/2688500.2688519 dblp:conf/ppopp/CogumbreiroHMY15 fatcat:zpos24esf5hgnjhvhiyvfbfk7y

Dynamic deadlock verification for general barrier synchronisation

Tiago Cogumbreiro, Raymond Hu, Francisco Martins, Nobuko Yoshida
2015 SIGPLAN notices  
Armus is evaluated with three benchmark suites in local and distributed scenarios.  ...  The implementation is distributed and fault-tolerant, and can verify X10 and Java programs.  ...  Let M map phaser names p ∈ P to phasers, used to represent all phasers in the system.  ... 
doi:10.1145/2858788.2688519 fatcat:tn3tnmgbhba4dpojydqrpxeiam

Planar Reflective Phaser and Synthesis for Radio Analog Signal Processing (R-ASP) [article]

Lianfeng Zou, Qingfeng Zhang, Christophe Caloz
2014 arXiv   pre-print
This phaser is the first reported phaser that combines the benefits of high resolution, inherent to cross-coupled resonator reflective phasers, and of compactness, inherent to planar circuits.  ...  A planar reflective phaser based on an open-ended edge-coupled-line structure is proposed.  ...  Figure 2 ( 2 a) is the bandpass equivalent circuit of the phaser, with center frequency ω 0 , where the half-wavelength resonators are modeled by distributed susceptances, B i pωq, and the couplings between  ... 
arXiv:1404.2628v1 fatcat:tdrl2of5grbrfh4zq7pkutnvyi

Improved estimates of coordinate error for molecular replacement

Robert Oeffner, Gábor Bunkóczi, Airlie J. McCoy, Randy J. Read
2013 Acta Crystallographica Section A Foundations of Crystallography  
A new estimate, the eVRMS, that uses these two parameters in a function optimized to fit the mean of the VRMS values is implemented in Phaser and improves MR outcomes. The distribution of  ...  Variance refinement functionality was added to Phaser to enable determination of the VRMS, the RMSD that optimises the log-likelihood gain (LLG) for a correct MR solution.  ...  The distribution of VRMS values has an approximately Gaussian deviation from the eVRMS, with the size of the error being proportional to the eVRMS.  ... 
doi:10.1107/s0108767313097432 fatcat:6zdkfeqsbrhgtd7mvr4e7or3ne

Integrating Asynchronous Task Parallelism with MPI

Sanjay Chatterjee, Sagnak Tasirlar, Zoran Budimlic, Vincent Cave, Milind Chabbi, Max Grossman, Vivek Sarkar, Yonghong Yan
2013 2013 IEEE 27th International Symposium on Parallel and Distributed Processing  
For programmers unfamiliar with MPI, we introduce distributed data-driven futures (DDDFs), a new data-flow programming model that seamlessly integrates intranode and inter-node data-flow parallelism without  ...  as larger applications and demonstrate better scalability compared to the most efficient MPI implementations, while offering a unified programming model to integrate asynchronous task parallelism with distributed-memory  ...  We have also enhanced the phaser construct for pointto-point and barrier synchronization within and across nodes.  ... 
doi:10.1109/ipdps.2013.78 dblp:conf/ipps/ChatterjeeTBCCGSY13 fatcat:e4orpd4ufzesnfjfraf5cqqaju

A procedure for studying strategy development in humans

Fernando A. Gonzalez, Michael Cathcart
1995 Behavoir research methods, instruments & computers  
Phaser kill rates did not increase sub-stantiaUy because increases in phaser kill effectiveness (kills per phaser command) were accompanied by decreases in phaser commandrate.  ...  Play strategies were denoted by the frequency distributions ofcommand sequences.  ... 
doi:10.3758/bf03204736 fatcat:uecxnhzlqfeurhorl66r4kyjxq

A Framework for Distributed Interaction in Intelligent Environments [chapter]

Dario Di Mauro, Juan C. Augusto, Antonio Origlia, Francesco Cutugno
2017 Lecture Notes in Computer Science  
A Framework for Distributed Interaction in Intelligent Environments  ...  Against other approaches in this area, PHASER is based on a strongly distributed model, where each device carries on a dialogue with the user and the global intelligence is built upon the collection of  ...  Fig. 1 . 1 Possible states and Transitions for a node in PHASER Fig. 2 . 2 The architecture of PHASER Fig. 4 . 4 An example of Ontology for Smart houses used in PHASER Fig. 5 .Fig. 6 . 56 Observed  ... 
doi:10.1007/978-3-319-56997-0_11 fatcat:xwn66dyflzdudpvdszjrwuoeza
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