Temat: environment obstacles - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Impact of Structures on the Operation of Air Traffic Radiolocation and Radionavigation Surveillance Systems
Autorzy:: Grzybkowski, Maciej J.
Niewiadomski, Daniel
Mora, Marcin
Powiązania:: https://bibliotekanauki.pl/articles/2058492.pdf
Data publikacji:: 2021
Wydawca:: Instytut Łączności - Państwowy Instytut Badawczy
Tematy:: air traffic safety
environment obstacles
ground radiolocalisation systems
Opis:: The article describes interference affecting the operation of radiolocation and radionavigation devices used in the air traffic surveillance systems, caused by the proximity of building structures. The impact of a hypothetical structure on the operation of primary and secondary air traffic surveillance radars and DVOR/DME beacons was simulated. The results of this simulation are presented in the form of airspace sectors in which false identification of aircraft may occur, and where it will not be possible to identify aircraft or use beacons due to the certain portion of airspace being in the shadow created by the structure. Analysis of the possibility of the PSR radar receiver being blocked by a strong signal reflected from a nearby building was performed as well.
Źródło:: Journal of Telecommunications and Information Technology; 2021, 4; 32--41
1509-4553
1899-8852
Pojawia się w:: Journal of Telecommunications and Information Technology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Study of legislative and administrative obstacles to SMEs business in the Czech Republic and Slovakia
Autorzy:: Gavurova, Beata
Belas, Jaroslav
Bilan, Yuriy
Horak, Jakub
Powiązania:: https://bibliotekanauki.pl/articles/19233597.pdf
Data publikacji:: 2020
Wydawca:: Instytut Badań Gospodarczych
Tematy:: small and medium-sized enterprises
SMEs
legislative obstacles
administrative obstacles
business environment
stability of business environment
Opis:: Research background: SMEs represent an integral part of the economy environment in a majority of the countries all over the world. They signify the most efficient, progressive, and important part of the advanced economies. The long-term effort of the EU countries, as well as other advanced economies is to create quality and stable conditions for their development in order to be able to respond to all the possible changes in the business environment that is being changed to more and more comprehensive in the recent time. Purpose of the article: The objective of the contribution is to examine administrative and legislative obstacles to SMEs business in the Czech Republic and Slovakia and the quantification of the differences in perceiving legislative and administrative obstacles to business by entrepreneurs in both countries. Methods: A questionnaire survey was conducted within SMEs in the Czech Republic and Slovakia in 2019. The research sample included 641 SMEs, 312 from the Czech Republic and 329 from Slovakia. We focused on 5 dimensions related to legislative and administrative obstacles to SMEs business within which selected statements were examined. Contingency tables were used to analyze the ratios of the examined variables. Findings & Value added: The differences detected in both countries in the respondents´ perception and assessment are evidence of the changes in the business environment of both countries, giving rise to the questions about the extent to which the legislative and administrative obstacles, as well as the obstacles related to law enforcement and bureaucracy are acceptable and by which groups of entrepreneurs. The results of the research provide valuable findings for the creators of regional and national policies, and represent a valuable basis for the creation of the concepts focused on the SMEs´ development in both countries. The results of the study also support the implementation of follow-up research in this area that will reveal other determinants affecting the development of SMEs. They also create a valuable platform for the construction of national and international benchmarking indicators in this area and the implementation of comparative analyses. This will also support the methodological area necessary for a creation of high-quality concepts and strategies.
Źródło:: Oeconomia Copernicana; 2020, 11, 4; 689-719
2083-1277
Pojawia się w:: Oeconomia Copernicana
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Metoda tworzenia modelu otoczenia z pomiarów Radarowego Detektora Przeszkód
A method for creating the model of environment, based on data delivered by the Radar Detector of Obstacles in Anti-collision system
Autorzy:: Jankowski, S.
Szymański, Z.
Szczyrek, J.
Graffstein, J.
Powiązania:: https://bibliotekanauki.pl/articles/212409.pdf
Data publikacji:: 2012
Wydawca:: Sieć Badawcza Łukasiewicz - Instytut Lotnictwa
Tematy:: Radarowy Detektor Przeszkód (RDP)
pomiary RDP
metoda tworzenia modelu otoczenia
system unikania kolizji
Radar Detector of Obstacles
method for creating the model of environment
anti-collision system
Opis:: W pracy przedstawiono metodę tworzenia modelu otoczenia w opracowywanym systemie antykolizyjnym dla Bezzałogowych Środków Latających. Model otoczenia powstaje w wyniku działania procedur przetwarzających dane z urządzeń pokładowych (np. AHRS), map cyfrowych oraz Radarowego Detektora Przeszkód. Struktury danych modelu otoczenia - zawierające syntetyczną informację o rozmieszczeniu obiektów w sąsiedztwie BSL - są następnie wykorzystywane przez algorytmy unikania kolizji. Cechą charakterystyczną metody jest kumulacja danych z kolejnych pomiarów, co pozwala na zwiększenie dokładności modelu otoczenia. W artykule zawarto krótką charakterystykę urządzeń wchodzących w skład projektowanego systemu antykolizyjnego, sposoby przeliczania danych pomiędzy różnymi układami współrzędnych oraz algorytm tworzenia modelu otoczenia.
The paper presents a method of creating an environment model in collision avoidance system for unmanned aerial vehicles (UAV). The environment model is generated by the procedures processing the data from on-board equipment. Radio Obstacle Detector and digital maps. Data structures of the environment model, containing synthetic information about the location of objects in the neighborhood of UAV, are used by the collision avoidance algorithm. A characteristic feature of the method is the accumulation of data from subsequent measurements, there by enhancing the accuracy of the environment model. The article includes a brief description of devices in the proposed collision avoidance system, conversion methods of the data between different coordinate systems and algorithm used for creation of the environment model.
Źródło:: Prace Instytutu Lotnictwa; 2012, 3 (224); 20-30
0509-6669
2300-5408
Pojawia się w:: Prace Instytutu Lotnictwa
Dostawca treści:: Biblioteka Nauki

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