Simulation as a Method for Asymptotic System Behavior Identification (e.g. Water Frog Hemiclonal Population Systems)

Systems thinking methods have evolved into a popular toolkit in Human Factors to analyze complex sociotechnical systems at early design stages, such as future airliners’ single pilot operations (SPO). A quantitative re-analysis of studies from a systematic literature review (Schmid & Stanton, 2019b) was conducted to categorically assess their contributions to researching SPO and to fitting their systems thinking methods to contemporary Human Factors problems. Although only 15 of 79 publications applied systems thinking methods to operational, automation, and the pilot incapacitation issue(s) of SPO, these studies provided a comprehensive concept of operations that is able to deal with many issues of future single-piloted airliners. These theoretical models require further evaluation by looking at the empirical instances of system behavior. Finally, the hierarchical structures in system’s development and operations from systems thinking enable Human Factors professionals and researchers to approach SPO systematically.

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Observation of Nociceptive Processing: Effect of Intra-Epidermal Electric Stimulus Properties on Detection Probability and Evoked Potentials

Brain Topography ◽

10.1007/s10548-020-00816-y ◽

2021 ◽

Vol 34 (2) ◽

pp. 139-153

Author(s):

Boudewijn van den Berg ◽

Jan R. Buitenweg

Keyword(s):

Evoked Potentials ◽

Detection Probability ◽

Pulse Interval ◽

System Behavior ◽

Stimulus Properties ◽

Nociceptive System ◽

Nociceptive Stimulus ◽

Peripheral Nerve Fiber ◽

Nociceptive Processing ◽

Mixed Regression

AbstractMonitoring nociceptive processing is a current challenge due to a lack of objective measures. Recently, we developed a method for simultaneous tracking of psychophysical detection probability and brain evoked potentials in response to intra-epidermal stimulation. An exploratory investigation showed that we could quantify nociceptive system behavior by estimating the effect of stimulus properties on the evoked potential (EP). The goal in this work was to accurately measure nociceptive system behavior using this method in a large group of healthy subjects to identify the locations and latencies of EP components and the effect of single- and double-pulse stimuli with an inter-pulse interval of 10 or 40 ms on these EP components and detection probability. First, we observed the effect of filter settings and channel selection on the EP. Subsequently, we compared statistical models to assess correlation of EP and detection probability with stimulus properties, and quantified the effect of stimulus properties on both outcome measures through linear mixed regression. We observed lateral and central EP components in response to intra-epidermal stimulation. Detection probability and central EP components were positively correlated to the amplitude of each pulse, regardless of the inter-pulse interval, and negatively correlated to the trial number. Both central and lateral EP components also showed strong correlation with detection. These results show that both the observed EP and the detection probability reflect the various steps of processing of a nociceptive stimulus, including peripheral nerve fiber recruitment, central synaptic summation, and habituation to a repeated stimulus.

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Building confidence in system behavior

ACM SIGAda Ada Letters ◽

10.1145/2658982.2527292 ◽

2013 ◽

Vol 33 (3) ◽

pp. 49-50

Author(s):

John B. Goodenough

Keyword(s):

System Behavior

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Evaluating the alignment of sequence diagrams with system behavior

Procedia Computer Science ◽

10.1016/j.procs.2021.01.267 ◽

2021 ◽

Vol 180 ◽

pp. 502-506

Author(s):

Atif Mashkoor ◽

Alexander Egyed

Keyword(s):

Sequence Diagrams ◽

System Behavior

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An Efficient Analytical Approach to Visualize Text-Based Event Logs for Semiconductor Equipment

Applied Sciences ◽

10.3390/app11135944 ◽

2021 ◽

Vol 11 (13) ◽

pp. 5944

Author(s):

Gunwoo Lee ◽

Jongpil Jeong

Keyword(s):

Complex System ◽

Analytical Approach ◽

System Behavior ◽

File Size ◽

Log Files ◽

Event Logs ◽

Hard Disk Space ◽

Long Time ◽

Log File ◽

Runtime Information

Semiconductor equipment consists of a complex system in which numerous components are organically connected and controlled by many controllers. EventLog records all the information available during system processes. Because the EventLog records system runtime information so developers and engineers can understand system behavior and identify possible problems, it is essential for engineers to troubleshoot and maintain it. However, because the EventLog is text-based, complex to view, and stores a large quantity of information, the file size is very large. For long processes, the log file comprises several files, and engineers must look through many files, which makes it difficult to find the cause of the problem and therefore, a long time is required for the analysis. In addition, if the file size of the EventLog becomes large, the EventLog cannot be saved for a prolonged period because it uses a large amount of hard disk space on the CTC computer. In this paper, we propose a method to reduce the size of existing text-based log files. Our proposed method saves and visualizes text-based EventLogs in DB, making it easier to approach problems than the existing text-based analysis. We will confirm the possibility and propose a method that makes it easier for engineers to analyze log files.

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An analysis of operating system behavior on a simultaneous multithreaded architecture

ACM SIGARCH Computer Architecture News ◽

10.1145/378995.379245 ◽

2000 ◽

Vol 28 (5) ◽

pp. 245-256

Author(s):

Joshua A. Redstone ◽

Susan J. Eggers ◽

Henry M. Levy

Keyword(s):

Operating System ◽

System Behavior ◽

Multithreaded Architecture

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Preliminary genetic data suggest the occurrence of the Balkan water frog, Pelophylax kurtmuelleri, in southwestern Poland

Amphibia-Reptilia ◽

10.1163/15685381-00003103 ◽

2017 ◽

Vol 38 (2) ◽

pp. 187-196 ◽

Cited By ~ 4

Author(s):

Krzysztof Kolenda ◽

Agnieszka Pietras-Lebioda ◽

Sebastian Hofman ◽

Maria Ogielska ◽

Maciej Pabijan

Keyword(s):

High Frequency ◽

Drainage System ◽

Source Population ◽

Ancestral Polymorphism ◽

Central European ◽

Water Frog ◽

The Balkans ◽

Intron 1 ◽

Frog Species ◽

Northward Expansion

Recent molecular studies have detected the occurrence of exotic water frog species (Pelophylaxsp.) in central and western European populations. Here, we report genetic evidence for the occurrence of the Balkan water frog,Pelophylax kurtmuelleri, in southwestern Poland. We found a high frequency of an allele of serum albumin intron-1 and a mitochondrial cytochromebhaplotype specific for this southern taxon in frogs from the Barycz river drainage system. We interpret this finding as evidence of admixture betweenP. kurtmuelleriand the localridibundus-esculentuswater frog population. The origin of the exoticP. kurtmuellerimitochondrial and nuclear alleles in southwestern Poland could be due to (i) hybridization after a human-mediated introduction ofP. kurtmuelleri, (ii) the persistence of ancestral polymorphism in central EuropeanP. ridibundus, or (iii) hybridization betweenP. kurtmuelleriandP. ridibundusin the Balkans followed by the northward expansion of admixedP. ridibundus. Identical mtDNA haplotypes found in southwestern Poland and localities on the borders between Greece, Albania and Macedonia suggest that this region harboured the source population ofP. kurtmuelleriat the studied site.

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