scholarly journals Information transmission in a two-step cascade: interplay of activation and repression

2021 ◽  
Author(s):  
Tuhin Subhra Roy ◽  
Mintu Nandi ◽  
Ayan Biswas ◽  
Pinaki Chaudhury ◽  
Suman K. Banik
Keyword(s):  
Information Transmission

ROBOTICS PROJECTS IN SCHOOL INFORMATICS COURSE

2019 ◽  
pp. 52-56
Author(s):  
V. V. Tarapata
Keyword(s):  
Information Transmission ◽  
Educational Robotics ◽  
Project Approach ◽  
Teaching Tools ◽  
Modern School ◽  
Research Activities ◽  
Information Processes ◽  
History Of ◽  
Normative Basis ◽  
Typical Model

The article describes the prerequisites for the use of educational robotics in the school course of informatics, the history of the development of its directions and the normative basis for its use in modern school education. A typical model of an educational robotic project for the organization of research and project activities of students has been proposed. The technological chart of the lesson as an example of the implementation of a robotic project in the framework of the research activities on informatics is considered. Approaches to the organization of educational activities, teaching tools and ways of evaluation in informatics class on the theme “Information processes. Information transmission” when using the project approach are described.

Propositions for ensuring the information security in the common ukrainian satellite system of information transmission

1998 ◽  
Vol 4 (5-6) ◽  
pp. 62-66
Author(s):  
I.D. Gorbenko ◽  
◽  
Yu.V. Stasev ◽  
A.V. Pot ◽  
A.M. Tkachev ◽  
...  
Keyword(s):  
Information Security ◽  
Information Transmission ◽  
Satellite System ◽  
The Common

Studying noise immunity of radio information transmission systems with noise-like phase-shift keyed signals and synchronization delay errors

2019 ◽  
pp. 105-113
Author(s):  
G. N. Maltsev ◽  
A. V. Evteev
Keyword(s):  
Phase Shift ◽  
Information Transmission ◽  
Noise Immunity ◽  
Tracking System ◽  
Tracking Error ◽  
Information Symbol ◽  
Transmission Systems ◽  
Synchronization System ◽  
Correlation Receiver ◽  
Selection Of

Introduction: Radio information transmission systems with noise-like phase-shift keyed signals based on pseudo-random sequences have potential noise immunity provided by accurately tracking the delay of the received signal in the correlation receiver. When working with moving objects, the delay of the received signal varies continuously, and the reception quality for noise-like phase-shifted signals highly depends on the synchronization system operation and on the accuracy of estimating the received signal delay by the tracking system. To ensure the required signal reception quality, it is necessary to provide an informed choice of tracking system parameters, taking into account their effects, which are the random and systematic components of the delay tracking error, on the selected noise immunity indicator.Purpose: Analyzing how the errors in tracking the delay of a received phase-shift keyed signal based on a pseudorandom sequence by the synchronization system of a radio information transmission system can affect the probability of erroneous reception of an information symbol.Results: The calculation method was used to obtain families of dependencies of the probability of erroneous reception of an information symbol on the signal-noise ratio (SNR), and the values of the random and systematic components of the delay tracking error which are normalized to the capture band of the correlation receiver. It has been shown that at a fixed SNR, the values of the random and systematic components of the delay tracking error are critical for the erroneous reception probability. In all the cases discussed, all the dependencies are characterized by a slow change of the erroneous reception probability while the synchronization errors within the area of small SNR have fixed values. As the SNR value grows, the erroneous reception probability rapidly drops. To ensure the specified signal reception quality and the reliability of the selection of information symbols and messages in a radio information transmission system with noise-like phase-manipulated signals, its synchronization system requires a joint selection of the tracking system parameters, taking into account the limitations imposed by the operating conditions and technical implementation features.Practical relevance: The obtained results can be used in noise immunity analysis of radio information transmission systems with noise-like phase-shift keyed signals in a wide range of communication conditions, and in providing technical solutions for synchronization systems ensuring the required quality of signal reception.

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