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The threshold of event simultaneity

Frederick Wieland
1997 ACM SIGSIM Simulation Digest  
In doing so, we shall introduce the threshold of event simultaneity and use it to understand the semantics of simultaneity.  ...  In this paper we revisit the notion of event simultaneity in the context of parallel and distributed simulation.  ...  The parameter δ is called the threshold of event simultaneity.  ... 
doi:10.1145/268823.268901 fatcat:kwpceyvcsfbftmmfrz2qnri5we

Thresholding Events of Extreme in Simultaneous Monitoring of Multiple Risks

John H. J. Einmahl, Jun Li, Regina Y. Liu
2009 Journal of the American Statistical Association  
In this article, a multivariate extreme value theory approach is used to establish thresholds for signaling varying levels of extremeness in the context of simultaneous monitoring of multiple risk measures  ...  This threshold system divides the sample space into regions with increasing levels of risk and allows instant assessments of risk level of any observed airline performance.  ...  The threshold system developed in the present work allows for simultaneous monitoring of any number of risk measures.  ... 
doi:10.1198/jasa.2009.ap08329 fatcat:4lwu3pzpgfgszlonwwjxgjd2tm

Enhanced Visual Temporal Resolution in Autism Spectrum Disorders

Christine M. Falter, Mark A. Elliott, Anthony J. Bailey, Warren H. Meck
2012 PLoS ONE  
Visual simultaneity thresholds were lower in individuals with ASD compared to TD individuals, suggesting that autism may be characterised by increased parsing of temporal event-structure, with a decreased  ...  Cognitive functions that rely on accurate sequencing of events, such as action planning and execution, verbal and nonverbal communication, and social interaction rely on well-tuned coding of temporal event-structure  ...  Thresholds of perceptual simultaneity between simple paired visual events have typically been reported to lie between about 30 and 60 ms, depending on the exact task used to measure the thresholds [27  ... 
doi:10.1371/journal.pone.0032774 pmid:22470425 pmcid:PMC3309999 fatcat:p4odxmmygrgcvi4ldzmp3cxy54

Top-K High Utility Episode Mining from a Complex Event Sequence

Sonam Rathore, Siddharth Dawar, Vikram Goyal, Dhaval Patel
2016 International Conference on Management of Data  
The number of high-utility episodes that can be extracted from a sequence depends upon the value of minimum utility threshold.  ...  We conduct extensive experiments on real and synthetic datasets and the experimental results demonstrate the effectiveness of our proposed strategies in terms of total execution time and the number of  ...  Similarly, the utilities of other simultaneous event sets are calculated and the event sets are inserted in the top-k list.After the simultaneous event sets are inserted, the top-k list is { (B) : 16,  ... 
dblp:conf/comad/RathoreDGP16 fatcat:gd4dl4um5vf5red4zjpkb4mhne

EXTENDED VISUAL SIMULTANEITY THRESHOLDS IN PATIENTS WITH SCHIZOPHRENIA

Mark Elliott, Laurence Lalanne, Caroline Corves, Janina Seubert, Jack Foucher, Anne Giersch
2008 Schizophrenia Research  
We conclude that the subjective evaluation of simultaneity/asynchrony is impaired in schizophrenia, thus leading to impairment in the phenomenology of event-structure coding.  ...  We examined the subjective evaluation of temporal structure using an experimental approach involving judgments of simultaneity of simple, visually presented stimuli.  ...  Acknowledgments The authors report no competing interest.  ... 
doi:10.1016/s0920-9964(08)70361-x fatcat:kqzfpcfqubbtpda6jxkjcdzsme

Extended Visual Simultaneity Thresholds in Patients With Schizophrenia

A. Giersch, L. Lalanne, C. Corves, J. Seubert, Z. Shi, J. Foucher, M. A. Elliott
2008 Schizophrenia Bulletin  
We conclude that the subjective evaluation of simultaneity/asynchrony is impaired in schizophrenia, thus leading to impairment in the phenomenology of event-structure coding.  ...  We examined the subjective evaluation of temporal structure using an experimental approach involving judgments of simultaneity of simple, visually presented stimuli.  ...  Acknowledgments The authors report no competing interest.  ... 
doi:10.1093/schbul/sbn016 pmid:18359954 pmcid:PMC2696372 fatcat:naggtkqlincnzav7a5gn7typia

Low-level temporal coding impairments in psychosis: Preliminary findings and recommendations for further studies

Heike Schmidt, John McFarland, Mohamed Ahmed, Colm McDonald, Mark A. Elliott
2011 Journal of Abnormal Psychology  
In this periment, the subjective judgements of the simultaneity of visually presented stimuli were mpared between 11 healthy controls, 9 chronic schizophrenia (CSZ) and a sample of 11  ...  Considering the pr ou sc th an Keywords: First-Episode Psychosis, Schizophrenia, Event-Structure Coding, Simultaneity with schizophrenia, are already present during first-episode psychosis (FEP).  ...  For the control group, nonps D that their simultaneity thresholds would be higher.  ... 
doi:10.1037/a0023387 pmid:21553943 fatcat:k6k7qxnf2ba2lggej7m5ydayju

Duplicate Detection of Spike Events: A Relevant Problem in Human Single-Unit Recordings

Gert Dehnen, Marcel S. Kehl, Alana Darcher, Tamara T. Müller, Jakob H. Macke, Valeri Borger, Rainer Surges, Florian Mormann
2021 Brain Sciences  
Here, we highlight the problem of an increased occurrence of simultaneous spike events on different recording channels in human single-unit recordings.  ...  Most of these simultaneous events were detected in clusters previously labeled as artifacts and showed similar waveforms.  ...  Acknowledgments: We thank the patients for their participation in the experiments, Alexander Unruh-Pinheiro for comments on the manuscript and Sina Mackay and Marcel Bausch for discussion and the anonymous  ... 
doi:10.3390/brainsci11060761 fatcat:tnnr4fiz7jgcblzunhewqgwtji

When Predictive Mechanisms Go Wrong: Disordered Visual Synchrony Thresholds in Schizophrenia

Laurence Lalanne, Mitsouko van Assche, Anne Giersch
2010 Schizophrenia Bulletin  
We check here whether this means a fusion of events in time, or on the contrary, a segregation of events and a deficit in coding time-event structure.  ...  Patients with schizophrenia display an impaired sense of temporal continuity, and we showed that they judge events as being simultaneous even in case of large onset asynchronies.  ...  Acknowledgments The Authors have declared that there are no conflicts of interest in relation to the subject of this study.  ... 
doi:10.1093/schbul/sbq107 pmid:20876220 pmcid:PMC3330002 fatcat:4wmzyu4rhbbp5o7g5oqkyb7rfi

Event manipulation for discrete simulations requiring large numbers of events

Ernst G. Ulrich
1978 Communications of the ACM  
Additional features and problems dealt with include the proper handling of simultaneous events; that certain events must be created, scheduled, and executed at the same points in simulated time; that infinite  ...  The event-manipulation system presented here consists of two major parts. The first part addresses the familiar problem of event scheduling efficiency when the number of scheduled events grows large.  ...  The scheduling algorithm deals with the problem of simultaneous events [5] , and actually gains in overall efficiency as the percentage of simultaneous events increases.  ... 
doi:10.1145/359588.359611 fatcat:eglsumurp5gxtj2qwtrejzb5su

Optimization of high count rate event counting detector with Microchannel Plates and quad Timepix readout

A.S. Tremsin, J.V. Vallerga, J.B. McPhate, O.H.W. Siegmund
2015 Nuclear Instruments and Methods in Physics Research Section A : Accelerators, Spectrometers, Detectors and Associated Equipment  
More than 10 4 12 simultaneous events can be detected with a spatial resolution of ~55 µm, while >10 3 13 simultaneous events can be detected with <10 µm spatial resolution when event centroiding is 14  ...  Optimization of the MCP gain, rear field voltage and 18 Timepix threshold levels is crucial for the device performance and that is the main subject of this 19 paper.  ...  The average event footprint area and number of detected events measured as a function of 243 Timepix threshold value.  ... 
doi:10.1016/j.nima.2014.10.047 fatcat:o5hfovxpnbefhktu2bbnlazhay

COMPARING TEMPORAL EVENT-CODING IN PATIENTS WITH FIRST EPISODE PSYCHOSIS AND CHRONIC SCHIZOPHRENIA

Heike Schmidt, John McFarland, Colm McDonald, Mark A. Elliott
2008 Schizophrenia Research  
This study compared the subjective evaluation of temporal structure between healthy controls, chronic schizophrenic and FEP patients using an experimental approach involving judgments of simultaneity of  ...  The results suggest that patients required longer delays between stimuli to detect asynchrony, although FEP patients exhibit shorter windows of simultaneity compared to the chronic sample.  ...  Simultaneity thresholds were measured in terms of the delay between the onset of the first and the second bar, i.e. bar-bar stimulus onset asynchrony (SOA).  ... 
doi:10.1016/s0920-9964(08)70324-4 fatcat:bsy7isgeufc7jaqyxhz736pake

A Moment to Reflect upon Perceptual Synchrony

Mark A. Elliott, Zhuanghua Shi, Sean D. Kelly
2006 Journal of Cognitive Neuroscience  
the simultaneity threshold is located.  ...  This event thus marks both the limit of perceived simultaneity and indeed the maximum interval of time between which the two key events would have been perceived as simultaneous.  ... 
doi:10.1162/jocn.2006.18.10.1663 pmid:17014371 fatcat:meeaqvm2mncsrfdljzd2j4jqgq

Low time resolution in schizophrenia

J.R. Foucher, M. Lacambre, B.-T. Pham, A. Giersch, M.A. Elliott
2007 Schizophrenia Research  
The guarantee of perceptual coherence for events through everyday life situations depends upon the capacity to correctly integrate series of multi-sensory experiences.  ...  Thirty patients with schizophrenia were compared with 33 normal controls using a simultaneity judgement paradigm.  ...  Foucher for his help in improving the manuscript. Appendix A.  ... 
doi:10.1016/j.schres.2007.08.013 pmid:17884350 fatcat:pdsncchovffa5hsl5j5wjmjgi4

Increased risk of heat waves in Florida: Characterizing changes in bivariate heat wave risk using extreme value analysis

David Keellings, Peter Waylen
2014 Applied Geography  
Maximum and minimum daily temperatures from the second half of the 20th century are examined using a high resolution dataset of 833 grid cells across the state of Florida.  ...  and minimum temperatures exceed their respective 90th percentile thresholds.  ...  As a result, we can expect more events where there are simultaneous crossings of high thresholds in both daytime and nighttime temperatures.  ... 
doi:10.1016/j.apgeog.2013.11.008 fatcat:4gn2vkaj25h3fargdxycgnwn34
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