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    Wyświetlanie 1-7 z 7
    Tytuł:
    System for Calibrating Analogue Merging Units in Absence of Synchronization Signals
    Autorzy:
    Cheng, H.-M.
    Huang, Q.-F.
    Ji, F.
    Xu, Q.
    Liu, J.
    Tian, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/221084.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    intelligent substation
    analogue merging unit
    peer-to-peer communication
    calibration system
    synchronization signal
    Opis:
    Synchronization signals are requisite for calibrating electrical measurement devices with digital output when using conventional calibration methods. However, since the signal sampling process of the analogue merging units (MUs) operating in an intelligent substation does not rely on external synchronization signals, accuracy calibration without the use of synchronization signals is of particular importance in order to guarantee the measurement accuracy in practical situations. So far, very little research on calibration systems independent of synchronization signals has been performed. This paper presents a design of the calibration system without dependence on synchronization signals. To verify the feasibility of the proposed design, the designed system and a conventional calibration system have been employed in testing the accuracy of the same analogue MU of a 0.2 accuracy class. The comparison of the test results shows that the differences of ratio errors are below 0.02%, and the maximum difference of phase errors is about 4′. This paper also provides a new efficient and significant calibration method which does not require any external synchronization signals.
    Źródło:
    Metrology and Measurement Systems; 2018, 25, 1; 129-138
    0860-8229
    Pojawia się w:
    Metrology and Measurement Systems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Koncepcja wymiany informacji w systemie ochrony sieci federacyjnych
    Information exchange between domains in the Federated Networks Protection System
    Autorzy:
    Kozik, R.
    Choraś, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/157510.pdf
    Data publikacji:
    2012
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Mechaników Polskich
    Tematy:
    bezpieczeństwo sieci komputerowych
    sieci federacyjne
    komunikacja P2P
    network security
    federated networks
    peer-to-peer communication
    Opis:
    W niniejszym artykule przedstawiono koncepcję wymiany informacji pomiędzy domenami w systemie ochrony sieci federacyjnych. Zaproponowano architekturę systemu ochrony sieci federacyjnych, a w szczególności omówiono zasadę działania Modułów Decyzyjnych (MD). Zaprezentowany sposób komunikacji między domenami wykorzystuje technologię P2P (Peer to Peer). Moduły Decyzyjne w poszczególnych domenach federacji mogą wymieniać informacje o stanie sieci, wykrytych działaniach nieuprawnionych oraz Ogólne Reguły Decyzyjne (ORD) będące wypracowanymi poleceniami reakcji. Współpraca domen w federacji pozwala na osiągnięcie efektu synergii i zwiększenie bezpieczeństwa sieci (m.in. sieci wykorzystywanych w administracji publicznej lub sieci militarnych). Opisano kwestie związane z bezpieczeństwem technologii P2P oraz przedstawiono scenariusz ukazujący korzyści płynące z zaproponowanego rozwiązania. Przedstawiona koncepcja jest rezultatem prac w projekcie rozwojowym SOPAS finansowanym przez MNiSW w zakresie bezpieczeństwa państwa.
    In this paper a concept and architecture of the Federated Networks Protection System (FNPS) are presented. The system components and, particularly, the Decision Module are described. The major contribution of the paper is the concept of P2P (Peer to Peer) based information exchange between federated networks. Communication between Decision Modules (DM) in each of the federated domain is based on P2P in order to inform about network status, detected attacks or anomalies and distribute General Decision Rules (GDR) describing specific reactions. The presented system is dedicated for federated networks and systems used by the public administration and military sector. Such systems can increase their overall security and resiliency by sharing and exchanging security related information and general reaction rules. There is also presented a sample scenario (SQLIA - SQL injection attack detection) to show how the proposed system can detect complex attacks and benefit from information sharing between federated domains.
    Źródło:
    Pomiary Automatyka Kontrola; 2012, R. 58, nr 2, 2; 184-187
    0032-4140
    Pojawia się w:
    Pomiary Automatyka Kontrola
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Smart mobile P2P communication optimization for close range by an automatic interface switch
    Autorzy:
    Gajewski, B.
    Martyn, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/114541.pdf
    Data publikacji:
    2015
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Mechaników Polskich
    Tematy:
    Peer-to-Peer Wi-Fi
    minimize latency
    mobile communication
    off-range connectivity
    Opis:
    The efficiency of peer-to-peer data connection for mobile applications is still an issue, and an essential problem for their users. The newest 4G LTE networks, though offering high throughput, still do not allow a direct peer-to-peer communication. Moreover, the users of cellular networks are still charged for each megabyte of data transfer. Much better connection parameters and smaller latencies are ordered by Wi-Fi networks. However, setting up hotspot Wi-Fi networks still requires some effort, as it must be done manually in most cases. In this paper, we propose a solution based on a technique of automatic switching between a Wi-Fi hotspot and a cellular network. Our method allows one to minimize latency and maximize throughput. It also lowers the time and effort needed to establish a Wi-Fi connection.
    Źródło:
    Measurement Automation Monitoring; 2015, 61, 7; 317-319
    2450-2855
    Pojawia się w:
    Measurement Automation Monitoring
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A P2P-based Communication Framework for Geo-Location Oriented Networks
    Autorzy:
    Miyoshi, Takumi
    Shimomura, Yusuke
    Fourmaux, Olivier
    Powiązania:
    https://bibliotekanauki.pl/articles/307656.pdf
    Data publikacji:
    2019
    Wydawca:
    Instytut Łączności - Państwowy Instytut Badawczy
    Tematy:
    geolocation oriented network
    location-based service
    overlay
    peer-to-peer
    Opis:
    This paper proposes a novel peer-to-peer communication framework to implement geographical location oriented networks, called G-LocON. Location-based services have been gaining in popularity, as proven by ridesharing and mobile games. Although these services have to construct geolocation oriented networks based on their users’ geographical locations, they completely rely on client/server models to communicate with neighboring terminals. G-LocON provides geolocation oriented device-to-device communication only with the current wireless technologies, such as LTE and Wi-Fi, cooperating with the global positioning system and peer-to-peer overlay networking. G-LocON will serve as a type of a mobile ad-hoc network in which devices located within the focusing area are capable of communicating directly. We developed a primitive Android application to implement the GLocON framework. Evaluation of the solution’s performance has verified the usefulness of the proposed system that offers an admissive transmission delay. Moreover, to confirm the application-related potential of the G-LocON framework, we also show a practical map software in which all neighboring mobile devices present in the focusing area are displayed.
    Źródło:
    Journal of Telecommunications and Information Technology; 2019, 1; 58-66
    1509-4553
    1899-8852
    Pojawia się w:
    Journal of Telecommunications and Information Technology
    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:
    Collaborative consumption – a new trend in the economy
    Autorzy:
    Różycka, Monika
    Powiązania:
    https://bibliotekanauki.pl/articles/1189751.pdf
    Data publikacji:
    2016
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Collaborative consumption
    the sharing economy
    communication
    peer-to-peer collaboration
    Opis:
    The speed of technological change and the increasing of social media make that the contemporary world economy is at a stage of constant transformation and quality changes. The purpose of this article is moving closer the latest trend of the sharing-economy (collaborative consumption) and showing the benefits and threats arising there from. t is important and topical subject, on account of the need for analysis of these issues, in particular, transactions are being entered into without the participation of the institution of the public market, that is on the public and not-formalized market.
    Źródło:
    World Scientific News; 2016, 48; 188-192
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    An empirical analysis of factors affecting sharing economy growth
    Autorzy:
    Grybaitė, Virginija
    Stankevičienė, Jelena
    Powiązania:
    https://bibliotekanauki.pl/articles/19078786.pdf
    Data publikacji:
    2018
    Wydawca:
    Instytut Badań Gospodarczych
    Tematy:
    sharing economy
    peer-to-peer
    information and communication technology
    multicriteria evaluation
    Opis:
    Research background: There are widely recognized benefits of sharing economy for entrepreneurs and consumers. The European Commission emphasizes the importance of European countries being open to new opportunities that sharing economy brings. In order to promote the development of sharing economy, it is important to understand what factors contribute to its development. Purpose of the article: The presented paper aims to identify the main factors relevant for the growth of sharing economy and to determine whether there are factors which are more significant for the development of the sharing economy than others. Based on reviewed literature, the Authors compiled a set of indicators and employed them for research purposes. The selected indicators were assigned into four main groups: technological, political and regulatory environment, economic and social-cultural environment. Methods: The authors used two multicriteria methods (SAW and APH), which were applied to the set of indicators and modeled five different situations by attributing significance to the indicators. The Authors have applied this set of indicators for assessing the following selected countries:  Lithuania, Latvia, Estonia and the United Kingdom. The data covers the years 2011-2015. Findings & Value added: The results of the research show that technological readiness and social-cultural environment are significant for the development of sharing economy. For further research the Authors recommend the creation of a composite Sharing Economy Index (SHEI).
    Źródło:
    Oeconomia Copernicana; 2018, 9, 4; 635-654
    2083-1277
    Pojawia się w:
    Oeconomia Copernicana
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-7 z 7

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