scholarly journals SYNTHESIS OF BARKER-LIKE SEQUENCES WITH ADAPTATION TO THE SIZE OF THE INTERFERENCE

2021 ◽  
Vol 3 (1) ◽  
pp. 91-98
Author(s):  
I. G. Tsmots ◽  
◽  
O. Ya. Riznyk ◽  
Yu. I. Budaretskyi ◽  
Oliinyk M. Ya. Oliinyk M. Ya. ◽  
...  
Keyword(s):  
Theoretical Analysis ◽  
Simulation Model ◽  
Experimental Studies ◽  
Code Sequence ◽  
Message Processing ◽  
Factors Influencing ◽  
Ideal Ring ◽  
Functional Efficiency ◽  
Main Components ◽  
Noise Tolerant

The method of synthesis of noise-resistant barker-like code sequences with the use of ideal ring bundles has been improved. The method for fast finding of such noise-like noise-resistant code sequences, which are able to find and correct errors in accordance with the length of the obtained code sequence, has been improved. An algorithm is implemented to quickly find such noise-resistant barker-like code sequences that are able to find and correct errors in accordance with the length of the obtained code sequence. A simulation model of noise-tolerant barker-like coding with the use of ideal ring bundles has been developed. The possibility of reducing the redundancy of noise-tolerant code sequences by cutting code sequences by a certain number of bits without losing the regenerative capacity of noise-tolerant codes has been investigated. Theoretical analysis of the possibilities of this approach and its effectiveness is performed. Several series of experimental studies of the reliability of the described method on different data samples were performed and its functional efficiency was confirmed. The analysis of the obtained data and identification of key factors influencing the result is carried out. The practical software implementation of the simulation model of noise-tolerant barker-like coding for finding and correcting errors in the obtained noise-tolerant barker-like code sequences is carried out. The used methods and algorithms of data processing, the main components for message processing and their purpose are described. The possibility of reducing the redundancy of noise-tolerant code sequences by reducing the code sequences by a certain number of bits without losing the reproducibility of noise-tolerant codes has been investigated. Theoretical analysis of the possibilities of this approach and its effectiveness is performed. Several series of experimental studies of the reliability of the described method on different data samples were performed and its functional efficiency was confirmed. The analysis of the obtained results is performed and the main factors influencing the obtained result are determined. The proposed noise-tolerant barker-like code sequences have practical value, because with the help of the obtained barker-like code sequence it is quite simple and fast to find up to 50 % and correct up to 25 % of distorted characters from the length of noise-tolerant barker-like code sequence.

scholarly journals The method and simulation model for the synthesis of barker-like code sequences

2021 ◽  
Vol 3 (2) ◽  
pp. 45-50
Author(s):  
I. G. Tsmots ◽  
◽  
O. Ya. Riznyk ◽  
B. I. Balych ◽  
Ch. Z. Lvovskij ◽  
...  
Keyword(s):  
Simulation Model ◽  
Noise Immunity ◽  
Wireless Systems ◽  
Code Sequence ◽  
Wireless Data ◽  
Transmission Systems ◽  
Ideal Ring ◽  
Sequence Ideal ◽  
Noise Tolerant ◽  
The Ideal

Noise immunity is one of the essential characteristics of modern wireless data reception/transmission systems. In wireless systems such as Wi-Fi, HiperLan, or Bluetooth, the signal is propagated by electromagnetic oscillations in the environment. However, unlike wiring systems, these oscillations are unprotected from external influences. Noise immunity is one of the essential characteristics of modern wireless data reception/transmission systems. Moreover, if several wireless systems work close enough to each other, there is a possibility of overlapping waves, which will damage the information signal. It is determined that for the tasks of control of unmanned aerial vehicles and mobile robotic complexes increasing the noise immunity of data transmission channels is an urgent problem. It has been investigated that Barker-like code sequences based on ideal ring bundles provide an increase in the power of the obtained sequences by optimizing the parameters of the ideal ring bundles used. It is determined that the increase of noise immunity during data reception and transmission is achieved by choosing the optimal ratios of the parameters of the ideal ring bundle. It is shown that the advantages of Barker-like code sequences such as the optimal ratio between the length of the sequence and its correcting ability, the ability to change the length of the sequence depending on the level of interference are widely used in modern wireless communication and telecommunications systems. The method of synthesis of Barker-like code sequences with the use of ideal ring bundles has been improved, which, by taking into account the ratios of the parameters of ideal ring bundles, provides the choice of the minimum bit code sequence that takes into account the level of interference. A simulation model of synthesis of Barker-like code sequences, noise generation, and error correction has been developed on the basis of the improved method of synthesis of Barker-like code sequences. The developed simulation model is used to study the processes of coding, decoding, detection, and correction of errors in the obtained Barker-like code sequences. It has been investigated that the use of synthesized Barker-like code sequences based on ideal ring bundles provides data recovery of damaged no more than 25 % of the bits of each codeword, and detects up to 50 % of damaged bits in each codeword. Keywords: Barker-like code sequence; ideal ring bundle; noise-tolerant coding; simulation model.

FACTORS INFLUENCING RIDERSHIP PREFERENCE IN USING LRT SERVICE IN KLANG VALLEY, MALAYSIA

2021 ◽  
Vol 19 (16) ◽  
Author(s):  
Rohayu Ab Majid ◽  
Rosli Said ◽  
Jamalunlaili Abdullah ◽  
Rohana Ngah ◽  
Qi Jie Kwong
Keyword(s):  
Light Rail ◽  
Negative Effects ◽  
Chi Square ◽  
The Public ◽  
Factors Influencing ◽  
Transportation Service ◽  
Design Attributes ◽  
Site Design ◽  
Klang Valley ◽  
Main Components

Light Rail Transit (LRT) is one of the public transports that provides a lot of benefits to the Malaysian. Yet this consumption depends on the diverse tastes of potential ridership which are influenced by various factors. However, it is very challenging to predict significant factors influencing ridership preferences. As such, the identification of these factors is very important in ensuring this transportation service really attract ridership attention. Thus, this paper intends to identify the main factors that influence ridership preference in taking LRT transportation. 28 attributes have been identified in this research which expands from four (4) main components. Data were collected from ridership’s survey, site observations and ridership statistical data. Pearson Chi-square has been employed to justify the significant status and the influence level of each LRT attribute and component factors toward ridership preference. The results show that 23 attributes recorded a significant status (<0.00) in two (2) different directions of correlation. Overall, three (3) component factors namely i) Comfortable Service, ii) Economics and iii) Indoor Environment Conditions, have influenced and contributed to the same effect on ridership considerations, as compared to the negative effects displayed by the Site Design Attributes.

scholarly journals Morality, protection, security and gain: lessons from a minimalistic, economically inspired multi-agent model

2020 ◽  
Vol 45 (1) ◽  
pp. 17-33
Author(s):  
Maciej Komosinski ◽  
Tomasz Żok
Keyword(s):  
Theoretical Analysis ◽  
Simulation Model ◽  
Continuous Variables ◽  
Agent Model ◽  
Agent Simulation ◽  
Multi Agent ◽  
Mathematical Equations

AbstractIn this work, we introduce a simple multi-agent simulation model with two roles of agents that correspond to moral and immoral attitudes. The model is given explicitly by a set of mathematical equations with continuous variables and is characterized by four parameters: morality, protection, and two efficiency parameters. Agents are free to adjust their roles to maximize individual gains. The model is analyzed theoretically to find conditions for its stability, i.e., the fractions of agents of both roles that lead to an equilibrium in their gains. A multi-agent simulation is also developed to verify the dynamics of the model for all values of morality and protection parameters, and to identify potential discrepancies with the theoretical analysis.

scholarly journals Theoretical and experimental studies of a gas stamping device with a piston pressure multiplier

2019 ◽  
Vol 18 (1) ◽  
pp. 163-173
Author(s):  
A. Yu. Botashev ◽  
R. A. Bayramukov
Keyword(s):  
Theoretical Analysis ◽  
Experimental Studies ◽  
Fuel Mixture ◽  
Small Scale ◽  
Scale Production ◽  
Pressure Treatment ◽  
Energy Of Combustion ◽  
Stamping Process ◽  
Pressure Multiplier ◽  
The Matrix

In many industries, the share of small-scale production plants is significant. In these conditions, compared with traditional methods of pressure treatment, pulse pressure treatment methods, one of the varieties of which is gas stamping, are more efficient. However, the known devices of gas stamping provide mainly stamping of thin-walled parts. To expand the technological capabilities of gas stamping, the authors developed a gas stamping device with a piston pressure multiplier, in which heating and deformation of the stamping workpiece is carried out using the energy of combustion of fuel mixtures in the combustion chamber, in the working cylinder and in the cavity of the matrix. This article is devoted to the study of the workflow of this device. Theoretical analysis of the workflow was carried out, and, as a result, a pattern was determined for the variation of the pressure that performs the stamping process in the working cylinder. In particular, it was found that at the final stage of the stamping process, due to the energy of combustion of the fuel mixture, the pressure in the working cylinder increases 1.5...2 times, which allows a significant increase in the thickness of the parts to be stamped. An experimental gas stamping device with a piston pressure multiplier was developed, and experimental studies were carried out. The studies confirmed the main results of the theoretical analysis: the discrepancy between the theoretical and experimental values of the degree of pressure multiplication in the working cylinder does not exceed 11%.

scholarly journals THE ROLE OF THE RELATIONSHIP WITH THE MOTHER IN CHILDHOOD IN FORMING A WOMAN'S ATTITUDE TOWARDS HER OWN MOTHERHOOD

2020 ◽  
Vol 11 (87) ◽  
Author(s):  
Tatiana Sidorenko ◽  
◽  
Natalia Grisenko ◽  
Keyword(s):  
Theoretical Analysis ◽  
Adult Age ◽  
Personal Attitude ◽  
Psychological Science ◽  
Factors Influencing ◽  
Different Types ◽  
Main Factors ◽  
Psychological Features ◽  
The Relationship

The article is devoted to the study of such an important psychological phenomenon as an attitude of women to their own motherhood. It is summarizes the study of the problem of motherhood in psychological science in general. The article analyzes the problem of the influence of the relationship with the mother in childhood on the formation of a woman's attitude to her own motherhood in adult age. It is illuminates views of foreign and national researchers on the study of this phenomenon, as well as the essence of different areas of research on this phenomenon. Based on the theoretical analysis of the literature on this topic, the concept of "motherhood", its content and psychological essence is studied. Cultural-historical, biological, physiological and psychological aspects to the study of motherhood are singled out. The main content of scientific views on the formation of the phenomenon of motherhood is generalized. The main factors influencing the development of a woman's maternal sphere and the formation of the attitude to one's own motherhood are analyzed and considered. The content of such basic concepts as "mother's image" and "maternal relations" is revealed. The psychological features of the formation of an adequate image of the mother in the theoretical analysis of the ontogenesis of the maternal sphere are analyzed. The article also reveals the dynamics of motherhood in ontogenesis. The types of maternal relations and their role in the life of a mature woman are determined, as well as the influence of these relations on the formation of a woman's attitude to her own motherhood. The influence of different types of relationships between women and their own mothers on the level of formation of their attitude to personal motherhood has been empirically studied. Two groups of women were studied, one group had a positive relationship with their own mother, and the other had a negative one. In the course of the research the differences between different types of maternal relations and the level of formation of a woman's personal attitude to motherhood are singled out.

scholarly journals Beyond the GFAP-Astrocyte Protein Markers in the Brain

Biomolecules ◽  
2021 ◽  
Vol 11 (9) ◽  
pp. 1361
Author(s):  
Agnieszka M. Jurga ◽  
Martyna Paleczna ◽  
Justyna Kadluczka ◽  
Katarzyna Z. Kuter
Keyword(s):  
Nervous System ◽  
Experimental Studies ◽  
Structural Diversity ◽  
Cell Types ◽  
Cellular Interactions ◽  
Quick Response ◽  
Protein Markers ◽  
Marker Proteins ◽  
Functional Efficiency ◽  
The Brain

The idea of central nervous system as one-man band favoring neurons is long gone. Now we all are aware that neurons and neuroglia are team players and constant communication between those various cell types is essential to maintain functional efficiency and a quick response to danger. Here, we summarize and discuss known and new markers of astroglial multiple functions, their natural heterogeneity, cellular interactions, aging and disease-induced dysfunctions. This review is focused on newly reported facts regarding astrocytes, which are beyond the old stereotypes. We present an up-to-date list of marker proteins used to identify a broad spectrum of astroglial phenotypes related to the various physiological and pathological nervous system conditions. The aim of this review is to help choose markers that are well-tailored for specific needs of further experimental studies, precisely recognizing differential glial phenotypes, or for diagnostic purposes. We hope it will help to categorize the functional and structural diversity of the astroglial population and ease a clear readout of future experimental results.

scholarly journals Factors Influencing Door-To-Doctor Time In An Emergency Department: Discrete Event Simulation Model

2016 ◽  
Vol 19 (7) ◽  
pp. A624 ◽  
Author(s):  
RA Ribeiro ◽  
EN Baungratz ◽  
G Vaccaro ◽  
PS Schmitz ◽  
AK Fernandes ◽  
...  
Keyword(s):  
Emergency Department ◽  
Simulation Model ◽  
Discrete Event Simulation ◽  
Discrete Event ◽  
Event Simulation ◽  
Discrete Event Simulation Model ◽  
Factors Influencing

Dynamics of development of hardiness as a factor in the formation of successful activity in the population future teachers – psychologists

2021 ◽  
Vol 47 (2) ◽  
pp. 89-101
Author(s):  
K.S. Dyssembekova ◽  
◽  
K.M. Nagimjanova ◽  
Keyword(s):  
Theoretical Analysis ◽  
Empirical Study ◽  
Empirical Data ◽  
Literature Analysis ◽  
Future Teachers ◽  
Model Dynamics ◽  
Main Components ◽  
The Impact

The article presents a systematic theoretical analysis of the phenomenon of «hardiness». The main components of hardiness and their relationship are described. Features of formation of successful activity in the course of students, hardiness are defined. The influence of the components of hardiness on the formation of successful activity is characterized. The results of an empirical study of the level of hardiness of future teachers – psychologists are presented. On the basis of empirical data and literature analysis, the model «Dynamics of the development of hardiness in future teachers – psychologist» is built. Attempts are made to concretize the accumulated theoretical experience about the phenomenon of hardiness and its connection with successful activity. The results of measuring the dynamics of the development of hardiness in future teachers – psychologists and the impact on the formation of their successful activities are presented.

Sign in / Sign up

Export Citation Format

Share Document