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Wyświetlanie 1-15 z 108
Tytuł:
GMDSS as a Data Communication Network for E-Navigation
Autorzy:
Korcz, K.
Powiązania:
https://bibliotekanauki.pl/articles/117493.pdf
Data publikacji:
2008
Wydawca:
Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:
e-Navigation
GMDSS
Data Communication Network
Data Exchange
Digital Selective Calling (DSC)
Inmarsat
NAVTEX
Narrow Band Direct Printing (NBDP)
Opis:
In paper the functional requirements and the radiocommunication services of Global Maritime Distress and Safety System (GMDSS) in respect of the E- Navigation has been described. Some aspects of the improvement of GMDSS equipment and the utilization of the improved GMDSS as a data communication network for E-Navigation has been presented. The items relating to technical improvement of the GMDSS which should be considered as one of the discussion on the strategy plan of E-Navigation was given.
Źródło:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2008, 2, 3; 263-268
2083-6473
2083-6481
Pojawia się w:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Accuracy of Relative Navigation in Automated Systems of Data Communication
Autorzy:
Dzunda, M.
Powiązania:
https://bibliotekanauki.pl/articles/116977.pdf
Data publikacji:
2008
Wydawca:
Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:
Accuracy
Automated Systems
Relative Navigation
Data Communication
Air Navigation
Flying Object
positioning system
Wide-Band Synchronous Automated Systems of Data Communication (ASDC)
Opis:
The architecture of wide-band synchronous automated systems of data communication (ASDC) enables utilization of high accuracy measurement of the signal reception times to relative navigation in the network. In this contribution an operation analysis of such systems in the relative navigation mode is conducted. The accuracy and possibilities of the utilization of these systems were examined by modeling in air navigation.
Źródło:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2008, 2, 2; 161-163
2083-6473
2083-6481
Pojawia się w:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Application of Data Communication to the Detection and Correction of Power System Faults
Autorzy:
Recioui, A.
Lograda, M.
Chettah, K.
Powiązania:
https://bibliotekanauki.pl/articles/1031503.pdf
Data publikacji:
2017-09
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
power system faults
data communication
fault detection
symmetrical components
LABVIEW
Opis:
Data communication is an important part in modern industrial processes and is necessary in automation, monitoring, and protection purposes. This paper aims at designing a real time communication between two computers for interchanging the state of a three phase circuit to emulate a transmission line protection system in power substation. The circuit designed in Proteus ISIS is based on "symmetrical component theory" and the algorithm for exchanging data between two computers is built using TCP/IP protocol in LABVIEW environment. The application consists of monitoring and controlling three phase lines by sending the data collected to one of the computers and sending the commands back to trip relays if any fault is detected. The purpose is to prevent the propagation of this fault and to connect other sources to maintain the flow of power to the load.
Źródło:
Acta Physica Polonica A; 2017, 132, 3; 819-821
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Using the theories of fuzzy sets for researching the processes of diagnostics of data communication networks
Autorzy:
Omonov, Ibratbek
Powiązania:
https://bibliotekanauki.pl/articles/2174473.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Polskie Towarzystwo Diagnostyki Technicznej PAN
Tematy:
data transmission systems
multiple in-multiple out fuzzy sets
diagnostics
Matlab Simulink
system transmisji danych
diagnostyka
Opis:
The article deals with the application of the queuing theory apparatus for analysing the diagnostic processes of data transmission networks (DTN). It is shown that with an increase in the complexity of DTN and existing tools and algorithms for their diagnostics, it seems expedient to create automated diagnostics systems that take into account the disadvantages and advantages of existing network diagnostics methods. The existing analytical methods (in the capacity of which probabilistic methods of the queuing theory are used) and statistical (methods of simulation modelling) are presented. In terms of the queuing system, the analysis of the closed, open (QS) is carried out and their characteristics are determined. The analysis of the statistical method for modelling the diagnostic system in the GPSS World environment is carried out. Models of the DTN diagnostics system are considered from the point of view of closed and open queuing systems. For analytical models of DTN diagnostic systems, the possibility of using the QS is considered, as a result of which the general structure of the main elements and procedures for the functioning of the diagnostic system are determined. The analysis of the possibilities of using the queuing theory made it possible to determine the analytical regularities for the model of diagnostic systems. The creation of automated diagnostic systems based on a queuing system provides a deep and accurate analysis of the characteristics of diagnostics and, therefore, is a promising direction in the development of systems for the technical operation and maintenance of DTN.
Źródło:
Diagnostyka; 2023, 24, 1; art. no. 2023202
1641-6414
2449-5220
Pojawia się w:
Diagnostyka
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Aspect of data communication security in the Central Node of Polands Schengen Information System and Visa Information System Component
Autorzy:
Bliźniuk, G.
Kośla, R.
Machnacz, A.
Powiązania:
https://bibliotekanauki.pl/articles/305903.pdf
Data publikacji:
2008
Wydawca:
Wojskowa Akademia Techniczna im. Jarosława Dąbrowskiego
Tematy:
IT systems
ICT security
Schengen zone
Schengen Information System
Visa Information System
Opis:
Data communication security assurance in the Central Node of Poland's Schengen Information System and Visa Information System Component (in polish: Centralny Węzeł Polskiego Komponentu Systemu Informacyjnego Schengen i Systemu Informacji Wizowej - CW PK SIS i VIS) is crucial for building adequate trust of the operation of mechanisms of the Schengen agreement in Poland. Presented in this chapter are the security requirements, agreed by member states of the Schengen agreement, which fulfillment is subject to independent review during periodical SIS/SIRENE evaluations. The essence of law, organizational and technical role means have also been indicated for assuring a high level of SIS and VIS data communication security, which is higher than the standard level required by regulations on the protecting of personal data. Directions for further development of the implementation of the SIS and VIS in Poland have been presented in the conclusion.
Źródło:
Biuletyn Instytutu Systemów Informatycznych; 2008, 2; 1-12
1508-4183
Pojawia się w:
Biuletyn Instytutu Systemów Informatycznych
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Open data in scientific communication
Autorzy:
Grygoruk, D.
Powiązania:
https://bibliotekanauki.pl/articles/38303.pdf
Data publikacji:
2018
Wydawca:
Instytut Badawczy Leśnictwa
Źródło:
Folia Forestalia Polonica. Series A . Forestry; 2018, 60, 3
0071-6677
Pojawia się w:
Folia Forestalia Polonica. Series A . Forestry
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A holistic study on the use of blockchain technology in CPS and IoT architectures maintaining the CIA triad in data communication
Autorzy:
Bhattacharjya, Aniruddha
Powiązania:
https://bibliotekanauki.pl/articles/2172111.pdf
Data publikacji:
2022
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
CPS
blockchain Internet of things
IIoT
DDoS
ARP spoofing
M2M
machine-to-machine
peer-to-peer system
P2P
CIA triad
Internet rzeczy
ARP
peer-to-peer
Opis:
Blockchain-based cyber-physical systems (CPSs) and the blockchain Internet of things (BIoT) are two major focuses of the modern technological revolution. Currently we have security attacks like distributed denial-of-service (DDoS), address resolution protocol (ARP) spoofing attacks, various phishing and configuration threats, network congestion, etc. on the existing CPS and IoT architectures. This study conducts a complete survey on the flaws of the present centralized IoT system’s peer-to-peer (P2P) communication and the CPS architecture’s machine-to-machine (M2M) communication. Both these architectures could use the inherent consensus algorithms and cryptographic advantages of blockchain technology. To show how blockchain technology can resolve the flaws of the existing CPS and IoT architectures while maintaining confidentiality, integrity, and availability (the CIA triad), we conduct a holistic survey here on this topic and discuss the research focus in the domain of the BIoT. Then we analyse the similarities and dissimilarities of blockchain technology in IoT and CPS architectures. Finally, it is well understood that one should explore whether blockchain technology will give advantages to CPS and IoT applications through a decision support system (DSS) with a relevant mathematical model, so here we provide the DSS with such a model for this purpose.
Źródło:
International Journal of Applied Mathematics and Computer Science; 2022, 32, 3; 403--413
1641-876X
2083-8492
Pojawia się w:
International Journal of Applied Mathematics and Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Application of Multiple Input Multiple Output Power Line Communication (MIMO-PLC) to Power Systems
Autorzy:
Recioui, A.
Powiązania:
https://bibliotekanauki.pl/articles/1031663.pdf
Data publikacji:
2017-09
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
power line communication
data communication
MIMO
power systems
LABVIEW
Opis:
Multiple input multiple output power line communication is presented with its major characteristics and models. Orthogonal frequency division multiplexing modulation scheme applied to power line channel model is presented, also, combination of orthogonal frequency division multiplexing with MIMO Alamouti space time block codes to improve reliability and data rate performance of the system is done. The evaluation of the orthogonal frequency division multiplexing-PLC system over power line communication channel is performed. The comparison between simple PLC and MIMO-PLC systems based upon achieved data rates and reliability in terms of bit error rate is presented.
Źródło:
Acta Physica Polonica A; 2017, 132, 3; 496-499
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Design and Testing of an Electronic Control System Based on STM X-Nucleo Board for Detection and Wireless Transmission of Sensors Data Applied to a Single-Seat Formula SAE Car
Autorzy:
Visconti, P.
Sbarro, B.
Primiceri, P.
Fazio, R.
Lay-Ekuakille, A.
Powiązania:
https://bibliotekanauki.pl/articles/227232.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
telemetry
sensors
wireless monitoring
data communication
firmware
electronic modules
Opis:
The emerging potentials in the electronics field, which facilitate the creation of complex projects with innovative functionalities, while maintaining low costs, are becoming even more appreciated by designers and engineers. In this manuscript, a telemetry system was designed and realized for monitoring main parameters of a racing vehicle. A STM32 Nucleo board acquires data from sensors installed on vehicle and transmits them to a base station. Acquired data are both stored on a SD card and wirelessly transmitted, for ensuring robustness/reliability of operation. The carried out tests confirm the truthfulness and compatibility of acquired data related to the vehicle parameters.
Źródło:
International Journal of Electronics and Telecommunications; 2019, 65, 4; 671-678
2300-1933
Pojawia się w:
International Journal of Electronics and Telecommunications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Referential graphs
Grafy referencyjne
Autorzy:
Ledziński, D.
Marciniak, B.
Śrutek, M.
Powiązania:
https://bibliotekanauki.pl/articles/389824.pdf
Data publikacji:
2013
Wydawca:
Politechnika Bydgoska im. Jana i Jędrzeja Śniadeckich. Wydawnictwo PB
Tematy:
graphs
chordal rings
data communication networks
grafy
grafy referencyjne
projektowanie sieci telekomunikacyjnych
Opis:
The authors of this paper have defined the notion of referential graphs which allow to model data and telecommunication networks in order to optimize them. Parameters of this type of graphs can be compared with parameters of modified chordal rings three and four degree. A description of the program developed for graphs of this type and its effects have been presented.
W artykule zdefiniowano pojęcie Grafu Referencyjnego, za pomocą którego można modelować sieci teleinformatyczne w celu ich optymalizacji. Zdefiniowano parametry takiego typu grafów, które zostały porównane z parametrami modyfikowanych pierścieni cięciwowych trzeciego i czwartego stopnia. Do modelowania poszczególnych przypadków opracowano program symulacyjny. Zaprezentowano opis tego programu oraz wyniki otrzymane przy wyszukiwaniu grafów referencyjnych dla szerokiego spektrum danych wejściowych.
Źródło:
Zeszyty Naukowe. Telekomunikacja i Elektronika / Uniwersytet Technologiczno-Przyrodniczy w Bydgoszczy; 2013, 17; 37-73
1899-0088
Pojawia się w:
Zeszyty Naukowe. Telekomunikacja i Elektronika / Uniwersytet Technologiczno-Przyrodniczy w Bydgoszczy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Features of the management of data encryption keys in the cloud storage MS SQL Azure
Cechy zarządzania kluczami szyfrowania danych przechowywanych w chmurze MS SQL Azure
Autorzy:
Beley, O.
Powiązania:
https://bibliotekanauki.pl/articles/952702.pdf
Data publikacji:
2018
Wydawca:
Politechnika Lubelska. Wydawnictwo Politechniki Lubelskiej
Tematy:
communication equipment
data communication
cyberspace
data transfer
sprzęt komunikacyjny
komunikacja danych
cyberprzestrzeń
transfer danych
Opis:
The main principles of data security and access organization in the Microsoft Azure cloud storage are considered. A role of hierarchy and access keys are presented. We describe the setup and the use of their keys (BYOK) for transparent data encryption (TDE) using Azure Key Vault keyring.
Uwzględniono główne zasady bezpieczeństwa danych i organizacji dostępu w chmurze Microsoft Azure. Przedstawiono zagadnienia hierarchii ról i kluczy dostępu. Zostały opisane dostosowywanie i używanie własnych kluczy (BYOK) do przezroczystego szyfrowania danych (TDE) przy użyciu magazynu kluczy platformy Azure.
Źródło:
Informatyka, Automatyka, Pomiary w Gospodarce i Ochronie Środowiska; 2018, 8, 4; 12-15
2083-0157
2391-6761
Pojawia się w:
Informatyka, Automatyka, Pomiary w Gospodarce i Ochronie Środowiska
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Optimal erasures in decision-feedback equalization for the Gaussian noise
Autorzy:
Kisilewicz, J. W.
Grzybowski, A.
Powiązania:
https://bibliotekanauki.pl/articles/908464.pdf
Data publikacji:
2006
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
transmisja danych
decyzyjne sprzężenie zwrotne
interferencja międzysymbolowa
data communication
decision feedback equalizer
intersymbol interference
error rate minimization
Opis:
A new method of optimizing decision feedback parameters for intersymbol interference equalizers is described. The coefficient existing in the decision feedback loop depends on risk qualification of the received decision. We prove that bit error probability can be decreased with this method for any channel with a single interference sample and small Gaussian noise. Experimental results are presented for selected channels. The dependences of optimal feedback parameters on channel interference samples and noise power are presented, too.
Źródło:
International Journal of Applied Mathematics and Computer Science; 2006, 16, 1; 147-154
1641-876X
2083-8492
Pojawia się w:
International Journal of Applied Mathematics and Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Synchronization of fractional-order discrete-time chaotic systems by an exact delayed state reconstructor: Application to secure communication
Autorzy:
Djennoune, Said
Bettayeb, Maamar
Al-Saggaf, Ubaid Muhsen
Powiązania:
https://bibliotekanauki.pl/articles/329964.pdf
Data publikacji:
2019
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
fractional order
discrete time system
chaotic map
chaotic synchronization
dead-beat observer
secure data communication
rząd ułamkowy
układ dyskretny
synchronizacja chaosu
komunikacja bezpieczna
Opis:
This paper deals with the synchronization of fractional-order chaotic discrete-time systems. First, some new concepts regarding the output-memory observability of non-linear fractional-order discrete-time systems are developed. A rank criterion for output-memory observability is derived. Second, a dead-beat observer which recovers exactly the true state system from the knowledge of a finite number of delayed inputs and delayed outputs is proposed. The case of the presence of an unknown input is also studied. Third, secure data communication based on a generalized fractional-order Hénon map is proposed. Numerical simulations and application to secure speech communication are presented to show the efficiency of the proposed approach.
Źródło:
International Journal of Applied Mathematics and Computer Science; 2019, 29, 1; 179-194
1641-876X
2083-8492
Pojawia się w:
International Journal of Applied Mathematics and Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Kompensacja niedopasowania szybkości szeregowej asynchronicznej transmisji danych w systemach pomiarowych z mikrokontrolerem ATmega16A w zakresie niskich temperatur
Compensation of the baud rate mismatch of asynchronous data communication in measurement systems with the ATmega16A microcontroller at low temperatures
Autorzy:
Arnold, K.
Powiązania:
https://bibliotekanauki.pl/articles/152133.pdf
Data publikacji:
2012
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
systemy pomiarowe
transmisja szeregowa asynchroniczna
kompensacja dryftu temperatury
measurement systems
compensation of temperature drift
Opis:
W pracy przedstawiono problem cieplnych zmian szybkości asynchronicznej transmisji szeregowej w systemie pomiarowym. Omówiono komunikację kontrolera systemu z układem ATmega16A w bloku akwizycji danych. Zaprezentowano zmiany współczynnika dopasowania szybkości nadajnika i odbiornika dla temperatur zmniejszanych do 77K. Zaproponowano sposób kompensacji niedopasowania szybkości transmisji w systemach pomiarowych z układem ATmega16A, pracujących w zakresie niskich temperatur.
The paper presents a problem of asynchronous serial transmission between the blocks of a measurement system working at differenttemperature ranges. In such conditions the receiver operational range is dependent on the mismatch between the received bit rate and the internally generated baud rate. There is discussed the communica-tion of a system controller with an ATmega16A device within the data acquisition path. In the paper there are also presented the results of USART baud rate and clock signal frequency tests conducted for an internal RC oscillator of the ATmega16A mi-crocontroller at low temperatures with the lowest point at 77K. The low-temperature characteristics of changes of the baud rate for the rated standard initial values are shown. There are considered conditions of effective asynchronous data transmission when the USART module of the ATmega16A microcontroller is used, because the accuracy of the USART internal baud rate clock depends on the internal RC oscillator temperature drift and the length of USART baud rate registers. There are calculated error characteristics of the UBRR coefficient changes and the obtained results are compared with the total error and the recommended receiver error defined for the ATmega16A USART module. In the paper the compensation method for the data rate mismatch is proposed.
Źródło:
Pomiary Automatyka Kontrola; 2012, R. 58, nr 11, 11; 941-943
0032-4140
Pojawia się w:
Pomiary Automatyka Kontrola
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Application of open multi-commodity market data model on the communication bandwidth market
Autorzy:
Kasprzak, P.
Kaleta, M.
Pałka, P.
Smoliła, K.
Toczyłowski, E.
Traczyk, T.
Powiązania:
https://bibliotekanauki.pl/articles/308563.pdf
Data publikacji:
2007
Wydawca:
Instytut Łączności - Państwowy Instytut Badawczy
Tematy:
communication bandwidth trade
market clearing
multi-commodity trade
Opis:
In the paper the market model for balancing communication bandwidth trade (BCBT) is analyzed in the form of multi-commodity market data model (M3). The distinguishing feature of BCBT model is that it assumes that market players can place buy offers not only for isolated network resources - inter-node links, but also for end-to-end network paths of predefined capacity, that is, every offer concerns a point-to-point bandwidth connection between a pair of specified locations in a communication network. The model enables effective balancing of sell and buy offers for network resources in a way which maximizes global economic welfare. The open multi-commodity market data model provides efficient and clear mechanisms, which support the environment of auctions and multi-commodity exchanges, especially when the trade is constrained by the infrastructure resources. Thus the model may be used in designing open information systems for market balancing and clearing in the context of multicommodity trade in various network infrastructure sectors.
Źródło:
Journal of Telecommunications and Information Technology; 2007, 4; 45-50
1509-4553
1899-8852
Pojawia się w:
Journal of Telecommunications and Information Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
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