Dual system theory of the biological clock: Effects of photoperiod, temperature, and thermoperiod on the determination of diapause

1977 ◽  
Vol 23 (11-12) ◽  
pp. 1363-1372 ◽  
Author(s):  
Stanley D. Beck
Keyword(s):  
System Theory ◽  
Biological Clock ◽  
Dual System

scholarly journals The dual-system theory of bipolar spectrum disorders: A meta-analysis

2021 ◽  
Vol 83 ◽  
pp. 101945
Author(s):  
Benjamin A. Katz ◽  
Hadar Naftalovich ◽  
Kathryn Matanky ◽  
Iftah Yovel
Keyword(s):  
System Theory ◽  
Meta Analysis ◽  
Dual System ◽  
Bipolar Spectrum ◽  
Bipolar Spectrum Disorders ◽  
Spectrum Disorders

Explaining unplanned online media behaviors: Dual system theory models of impulsive use and swearing on social networking sites

2017 ◽  
Vol 20 (8) ◽  
pp. 3050-3067 ◽  
Author(s):  
Ofir Turel ◽  
Hamed Qahri-Saremi
Keyword(s):  
System Theory ◽  
Social Networking ◽  
Social Networking Sites ◽  
Media Use ◽  
Behavioral Control ◽  
Dual System ◽  
Cognitive Behavioral ◽  
Online Media ◽  
Inhibition Effect

Unplanned (i.e. spontaneous) online behaviors such as impulsive use of social networking sites (SNS) and swearing on SNS are prevalent and can adversely affect users and society. Drawing on dual system theory, this article conceptualizes and empirically investigates the etiology of such behaviors. Results of two studies ( n1 = 295 SNS users, focuses on impulsive use; n2 = 336 SNS users, focuses on swearing) show that both of these online behaviors are driven, in part, by cognitive-emotional preoccupation with the SNS and inhibited, in part, by cognitive-behavioral control over using the SNS. The inhibition effect is both direct and indirect, through the suppression of the cognitive-emotional preoccupation effects. The findings provide a theoretical lens of analysis through which impulsive and unitneded media use behaviors can be explained.

scholarly journals Automatically determines the length of the dual system to a bivalent system

2018 ◽  
Vol XIX (1) ◽  
pp. 50-57
Keyword(s):  
Subsequent Development ◽  
Dual System ◽  
Point Of View ◽  
Automatic Determination ◽  
Stable States ◽  
System A ◽  
Minimum Number ◽  
System Length

From the point of view of reliability theory, a system can have two stable states: functioning and defect (bivalent system). Any system is a set of elements. Each element in this set can be found in one of the following states: operating state and fault condition. A subset of elements in the running state is called a system link if they only ensure the system works. The length of a bivalent system is equal to the minimum number of elements that the system holds. In this paper we present an algorithm for automatic determination of dual system length to a bivalent system, a Matlab script, a case study and subsequent development directions.

scholarly journals The Transfer Function of the SARS-CoV-2 Spread in Different Countries with Stability, Observability, and Controllability Analysis

2021 ◽  
Author(s):  
Jasmina Lozanović Šajić ◽  
Sonja Langthaler ◽  
Sara Stoppacher ◽  
Christian Baumgartner
Keyword(s):  
Differential Equation ◽  
System Theory ◽  
Control System ◽  
System Identification ◽  
Transfer Function ◽  
State Space ◽  
Separate System ◽  
The Stability ◽  
Controllability And Observability

Abstract This paper presents the determination of the transfer function of the spreading pandemic caused by SARS-CoV-2 in different countries. The methodology of system identification, well known in control system theory, based on the number of infected was used. Appropriate hypotheses have been adopted to determine the transfer function of the system. Each country is viewed as a separate system, and comparisons of determined systems are given. The systems are also presented in the state space, the stability of the systems is analysed, and the matrices of controllability and observability are determined. After analysis, it is shown that the spread of the SARS-CoV-2, for each country, can be described with the same order of transfer function and differential equation.

scholarly journals Automatic determination of the dual system width of to a bivalent system

2018 ◽  
Vol XIX (1) ◽  
pp. 58-64
Author(s):  
Vasiliu Paul
Keyword(s):  
Dual System ◽  
The Other ◽  
Automatic Determination ◽  
Stable States ◽  
System A ◽  
Minimum Number

A system is a set of elements that can be found in one of the following states: operating state and fault. Any system has two stable states: functioning and defect, which is why, in the theory of reliability, it is called a bivalent system. A subset of defective elements is called the system cut if all the other elements of the system are in operation and the system is defective. The width of a bivalent system is equal to the minimum number of elements the system cuts have. In this paper is presented an algorithm for automatic determination of the dual system width to a bivalent system, a Matlab script that implements the algorithm, a case study and subsequent directions of development.

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