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Circadian Rhythms and Gene Regulation02:19

Circadian Rhythms and Gene Regulation

The biological clock is involved in many aspects of regulating complex physiology in all animals. It was in 1935 when German zoologists, Hans Kalmus and Erwin Bünning, discovered the existence of circadian rhythm in Drosophila melanogaster. However, the internal molecular mechanisms behind the circadian clock remained a mystery until 1984, when Jeffrey C. Hall, Michael Rosbash, and Michael W. Young discovered the expression of the Per gene oscillating over a 24-hour cycle. In subsequent years,...
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Scientists always try their best to record measurements with the utmost accuracy and precision. However, sometimes errors do occur. These errors can be random or systematic. Random errors are observed due to the inconsistency or fluctuation in the measurement process, or variations in the quantity itself that is being measured. Such errors fluctuate from being greater than or less than the true value in repeated measurements. Consider a scientist measuring the length of an earthworm using a...
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Collecting Sleep, Circadian, Fatigue, and Performance Data in Complex Operational Environments
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Collecting Sleep, Circadian, Fatigue, and Performance Data in Complex Operational Environments

Published on: August 8, 2019

A circadian rhythm in skill-based errors in aviation maintenance.

Alan Hobbs1, Ann Williamson, Hans P A Van Dongen

  • 1San Jose State University/NASA Ames Research Center, Moffett Field, California 94035-1000, USA. alan.hobbs@nasa.gov

Chronobiology International
|July 27, 2010
PubMed
Summary
This summary is machine-generated.

Human error in 24/7 workplaces shows a circadian rhythm, peaking in the early morning. Skill-based errors, like absent-minded mistakes, are most common during these times, particularly in aircraft maintenance.

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A Computational Method to Quantify Fly Circadian Activity
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A Computational Method to Quantify Fly Circadian Activity
13:05

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Published on: October 28, 2017

Area of Science:

  • Human factors and ergonomics
  • Occupational safety and health
  • Industrial psychology

Background:

  • Human error in continuous operations often follows a circadian pattern, peaking in the early morning.
  • Previous studies have not differentiated error types within circadian analyses.
  • The Skill-Rule-Knowledge (SRK) framework categorizes errors based on cognitive control: skill-based, rule-based, and knowledge-based.

Purpose of the Study:

  • To investigate whether different types of human error exhibit distinct circadian rhythms.
  • To analyze the temporal patterns of skill-based, rule-based, knowledge-based errors, and procedure violations in aircraft maintenance.

Main Methods:

  • A survey of 402 Australian aircraft maintenance personnel reporting safety incidents.
  • Categorization of 369 human errors using a modified Skill-Rule-Knowledge (SRK) framework.
  • Analysis of error frequency adjusted for worker presence across a 24-hour period.

Main Results:

  • Skill-based errors showed a significant circadian rhythm, peaking in the early morning hours.
  • Procedure violations were the second most common error type.
  • Rule-based and knowledge-based errors did not demonstrate statistically significant circadian variations.

Conclusions:

  • Aircraft maintenance technicians face a heightened risk of skill-based, "absent-minded" errors during the early morning hours.
  • Circadian rhythms in human error are specific to error type, with skill-based errors being most susceptible.
  • Understanding these patterns can inform strategies to mitigate human error in shift work environments.