Search

Copyright of Internationales Archiv für Arbeitsmedizin is the property of Springer Nature and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Internationale Zeitschrift für Angewandte Physiologie einschließlich Arbeitsphysiologie is the property of Springer Nature and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Tongji Medical University is the property of Springer Nature and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Internationale Zeitschrift für Angewandte Physiologie einschließlich Arbeitsphysiologie is the property of Springer Nature and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Proceeding from a formal definition of heart rate variability, some mathematical and statistical techniques from sampling statistics and time series analysis for the analytical evaluation of heart rate variability for ergonomics purposes are presented and compared. The concept of sampling statistics gives a measure of heart rate variability, arrived at by combining two measures, which were chosen according to a definite criterion. The applicability of this measure is discussed; especially with respect to serial correlation influences when using statistical tests. The two main methods of spectral analysis—the calculation of the transformed autocovariance function and of harmonic analysis–are presented. The influences of interpolations, algorithms and physiological effects are discussed. A possible measure of heart rate variability, calculated by spectral estimates, is proposed and some results are given. [ABSTRACT FROM PUBLISHER]

Heart rate variability is a result of the superimposition of different sources of variation which are systemized. Three parameters are used to describe the phenomenon of heart rate variation. The range of variation of these parameters is discussed using examples from both laboratory and field investigations. Analyses demonstrate a correlation between heart rate and their variability. Discussion of of the variation of the chosen parameters suggests that, when heart rate variability is used as a measure of strain in field research, strain might be under-assessed. [ABSTRACT FROM PUBLISHER]

Information content analysis based on information theory can be used to evaluate stress in controllers. The method is applied to the analysis of radiotelecommunication in air traffic control: ‘ message types ’ are defined and their information content is evaluated using the syntactic level of information. Related to time, the measurements of information provide a stress factor. Preliminary results indicate the usefulness of the method. [ABSTRACT FROM PUBLISHER]

A short system analysis of the air traffic control systems with respect to their purpose and realization shows the role which the human operator plays. The task of man in this system can be determined as information processing. Evaluation of these tasks is important for selection of personal, for job evaluation, and for redesigning tasks and jobs in order to fulfill the tasks of ATC in future. This evaluation of man's tasks can be regarded either from the demands of the job or from their fulfillment and effect for man. Both aspects have to be connected to get objective results which are valid for man. Special research problems arise from the influence of the individual abilities and from the correlation of stress as work load factor and strain as effect of this work load on man. [ABSTRACT FROM PUBLISHER]