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Tytuł:
Positioning of scholars
Pozycjonowanie uczonych
Autorzy:
Drozdowicz, Zbigniew
Powiązania:
https://bibliotekanauki.pl/articles/2121147.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
institutional positioning
titular positioning
bibliometric positioning
Opis:
The academic community was and still is a community of scholars taking various positions. Problematic was and still is the changing of ways we set these posi- tions in both, in relation to a long lasting academic tradition and in a much short- er period of academic activity of particular scholars. Some of these ways did show in a greater extent its own usability and some in lesser. In these remarks I make the attempt to point out those who did work out well and in some way still do and which ones should be history by now. However it is not all. Relatively recently ways of positioning of scholars occurred that are in some perspectives innovative and widely applied (also in Poland). Nevertheless they do have in the academic millieu its followers and radical opponents. The bibliometric positioning of scho- lars is one of those ways.
Źródło:
Nauka; 2022, 1; 51-71
1231-8515
Pojawia się w:
Nauka
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Navigation with ECDIS: Choosing the Proper Secondary Positioning Source
Autorzy:
Brčić, D.
Kos, S.
Žuškin, S.
Powiązania:
https://bibliotekanauki.pl/articles/117478.pdf
Data publikacji:
2015
Wydawca:
Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:
ECDIS
positioning system
Positioning Sensor
Positioning Source
ECDIS Founctions
Navigation with ECDIS
Secondary Positioning Source
watchkeeping
Opis:
The completion of ECDIS mandatory implementation period on-board SOLAS vessels requires certain operational, functional and educational gaping holes to be solved. It especially refers to positioning and its redundancy, which represents fundamental safety factor on-board navigating vessels. The proposed paper deals with primary and secondary positioning used in ECDIS system. Standard positioning methods are described, discussing possibilities of obtained positions’ automatic and manual implementation in ECDIS, beside default methods. With the aim of emphasizing the need and importance of using secondary positioning source in ECDIS, positioning issue from the standpoint of end-users was elaborated, representing a practical feedback of elaborated topic. The survey was conducted in the form of international questionnaire placed among OOWs, ranging from apprentice officers to captains. The result answers and discussion regarding (non)usage of secondary positioning sources in ECDIS were analysed and presented. Answers and statements were elaborated focusing not only in usage of the secondary positioning system in ECDIS, but in navigation in general. The study revealed potential risks arising from the lack of knowledge and even negligence. The paper concludes with summary of findings related to discrepancies between theoretical background, good seamanship practice and real actions taken by OOWs. Further research activities are pointed out, together with planned practical actions in raising awareness regarding navigation with ECDIS.
Źródło:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2015, 9, 3; 317-326
2083-6473
2083-6481
Pojawia się w:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
An Ultra-Wideband System for Vehicle Positioning
Autorzy:
Kolakowski, J.
Cichocki, J.
Makal, P.
Michnowski, R.
Powiązania:
https://bibliotekanauki.pl/articles/226796.pdf
Data publikacji:
2010
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
UWB
vehicle positioning
positioning systems
TDOA
Opis:
Systems supporting traffic safety require precise information on a vehicle position. The paper contains a proposal for a vehicle localization system based on ultra-wideband (UWB) technology. The system allows for vehicle positioning with submeter accuracy. The paper presents a system concept and an algorithm used for position calculation. The algorithm consists in selection of a system configuration in order to decrease the positioning uncertainty. The system concept was verified with a developed system demonstrator. The paper contains a description of the devices comprising the system. Exemplary results of outdoor demonstrator tests are included and discussed. The tests confirmed efficiency and attractiveness of the proposed solution.
Źródło:
International Journal of Electronics and Telecommunications; 2010, 56, 3; 247-256
2300-1933
Pojawia się w:
International Journal of Electronics and Telecommunications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Research on visible light indoor positioning algorithm based on fire safety
Autorzy:
Li, Mao
Jiang, Feng
Pei, Cong
Powiązania:
https://bibliotekanauki.pl/articles/174338.pdf
Data publikacji:
2020
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
indoor positioning algorithm
camera
indoor positioning system
Opis:
From the perspective of ensuring life safety, combined with the advantages of high-speed time response and energy conservation of white light emitting diodes (LEDs), the visible light indoor positioning algorithm based on fire safety is proposed in the paper. First, the model is designed which needs three LED lights arranged in a straight line and positioned in the geographically north direction on the top of the model. Then, the proposed algorithm is discussed and analyzed when the camera is located at the center of the model and facing north, when the camera is located at the center of the model and the angle is rotated, and when the camera is located at any position of the model, respectively. It can accurately calculate the current position of the camera, its response speed is fast and the positioning accuracy is high. Furthermore, this paper also verifies the practicability and reliability of the algorithm by designing the visible light indoor positioning system based on fire safety rescue in natural environment and smoke environment. The experimental results show that the positioning error does not exceed 0.70 cm in smoke environment.
Źródło:
Optica Applicata; 2020, 50, 2; 209-222
0078-5466
1899-7015
Pojawia się w:
Optica Applicata
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Positioning in an Inter-Professional Team Meeting: Examining Positioning Theory as a Methodological Tool for Micro-Cultural Group Studies
Autorzy:
Hirvonen, Pasi
Powiązania:
https://bibliotekanauki.pl/articles/2108127.pdf
Data publikacji:
2013-10-31
Wydawca:
Uniwersytet Łódzki. Wydawnictwo Uniwersytetu Łódzkiego
Tematy:
Positioning Theory
Positioning
Group
Interaction
Micro-Cultural
Opis:
This paper sets out to test the possibilities of the Positioning Theory as a means to approach small group phenomena from a micro-cultural perspective. The study draws on a transcription of a videotaped inter-professional team meeting in the field of social services. Analysis of the data was set to examine how the basic concepts of the Positioning Theory suit the analysis of in-group phenomena, what different forms of positioning are present, and how the positioning is connected to the group processes. Studying the group’s interaction shows how it is possible to approach the interaction via the basic concepts of the Positioning Theory and how the positioning is intervened with group processes, such as decision-making, arguing, and conflict. The study also offers a new theoretical and empirical perspective to the research on small group dynamics.
Źródło:
Qualitative Sociology Review; 2013, 9, 4; 100-114
1733-8077
Pojawia się w:
Qualitative Sociology Review
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Supporting Process of Independent Navigation Inside Buildings Based on Low-Energy Bluetooth Transmitters
Autorzy:
Żochowski, Tomasz
Powiązania:
https://bibliotekanauki.pl/articles/2052438.pdf
Data publikacji:
2021
Wydawca:
Uniwersytet Przyrodniczo-Humanistyczny w Siedlcach
Tematy:
beacons
indoor positioning
bluetooth
positioning of mobile devices
Opis:
Thanks to the use of satellite positioning systems (including GPS) the ability to determine a user's position in open spaces has become a necessary element of everyday life. Nowadays people cannot imagine moving in an "urban jungle” with paper maps without electronic support, but dozens of years ago those maps were more popular than satellite navigation. A similar revolution may also await navigations in closed spaces such as public or commercial buildings. Because as the urbanisation process, the surfaces of various buildings grow, which significantly impedes orientation in them, especially for the blind or visually impaired users. As satellite navigation systems are burdened with errors, which increase when trying to use them in confined spaces, it becomes necessary to use more accurate technology. As a step towards solving this problem, we propose a solution supporting the navigation of users, especially the visually impaired, inside buildings. Our approach is based on using low energy Bluetooth transmitters and a method of determining the user's position using the trilateration algorithm and the appropriate placement of transmitters in a space.
Źródło:
Studia Informatica : systems and information technology; 2020, 1-2(24); 71-83
1731-2264
Pojawia się w:
Studia Informatica : systems and information technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Subjective Evaluation of Three Headphone-Based Virtual Sound Source Positioning Methods Including Differential Head-Related Transfer Function
Autorzy:
Storek, D.
Rund, F.
Marsalek, P.
Powiązania:
https://bibliotekanauki.pl/articles/176959.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
virtual positioning
virtual reality
positioning method
positioning algorithm
head-related transfer function
amplitude panning
Opis:
This paper analyses the performance of Differential Head-Related Transfer Function (DHRTF), an alternative transfer function for headphone-based virtual sound source positioning within a horizontal plane. This experimental one-channel function is used to reduce processing and avoid timbre affection while preserving signal features important for sound localisation. The use of positioning algorithm employing the DHRTF is compared to two other common positioning methods: amplitude panning and HRTF processing. Results of theoretical comparison and quality assessment of the methods by subjective listening tests are presented. The tests focus on distinctive aspects of the positioning methods: spatial impression, timbre affection, and loudness fluctuations. The results show that the DHRTF positioning method is applicable with very promising performance; it avoids perceptible channel coloration that occurs within the HRTF method, and it delivers spatial impression more successfully than the simple amplitude panning method.
Źródło:
Archives of Acoustics; 2016, 41, 3; 437-447
0137-5075
Pojawia się w:
Archives of Acoustics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Some aspects of development in radar technology in the context of accurate positioning
Autorzy:
Felski, A.
Powiązania:
https://bibliotekanauki.pl/articles/320823.pdf
Data publikacji:
2015
Wydawca:
Polskie Forum Nawigacyjne
Tematy:
resilient positioning
time system
solid state radar
positioning
accuracy
Opis:
In the end of XX century we were witnesses of the revolution in a radio-navigation, which led to the present domination of GPS. Dozens of radio-navigation systems disappeared. However now in many papers more and more often we can read an opinion, that GNSS monopoly becomes dangerous. This results from the similar sensibility of all GNSS systems on the same disturbances consequential from the similar radiofrequency band and similarly low powers of the signal. There is a growing approval in the maritime world that GNSS will not provide a required resilience because of common vulnerabilities. An anticipated radio navigation system should be a combination of systems, providing redundancy and effective work when GNSS does not work properly. Lately a lot of authors commonly pointed-out a potential advantages of modified Loran (e-Loran), however surely still it will be only a potential option, particularly for the southern hemisphere, where this system has never existed. An issue of alternative systems becomes urgent, because of the growing concern about GNSS system operation. The solution should not demand high financial effort, well fit to the existing law and utilize a present technology. The paper presents a general outlook of potential development in a present radar devices considering their use as an element of a positioning system. In this context radar seems to be an attractive option, however its utilization as an alternative for GNSS should reach considerably higher technical performances. The accessible information prove that it is possible to reach a higher accuracy of the position obtained from the modified radar in the future, especially with the suitable navigational infrastructure on shore.
W końcu XX stulecia byliśmy świadkami rewolucji w radionawigacji, co doprowadziło do obecnej dominacji GPS. Zniknęły dziesiątki systemów radionawigacyjnych. Jednak obecnie w wielu wystąpieniach coraz częściej wyraża się opinie, że monopol GNSS staje się ryzykowny. Przyczyną tych obaw jest fakt stosowania zbliżonych rozwiązań technologicznych i wykorzystywania, w istocie tego samego pasma częstotliwości radiowych we wszystkich systemach nawigacji satelitarnej, co czyni te systemy jednakowo podatnymi na zakłócenia. W takim razie należałoby oczekiwać, że system radionawigacyjny powinien być kombinacją systemów, które zapewnią zarówno wzajemną redundancję, jak i stabilną pracę wówczas, gdy GNSS nie pracuje właściwie. Ostatnio wielu autorów wskazuje na potencjalne korzyści zmodyfikowanej wersji systemu Loran (e-Loran), jednak należy to traktować jak jedną z opcji, szczególnie wobec faktu, że na półkuli południowej ten system nigdy nie istniał. Tymczasem coraz bardziej powszechne obawy o funkcjonowanie GNSS powodują, że kwestia alternatywnych rozwiązań staje się pilną. Poza tym byłoby pożądane, aby proponowane rozwiązania uwzględniały zarówno ograniczone nakłady finansowe, jak i w miarę możliwości obowiązujące uwarunkowania prawne oraz stan rozwoju techniki. Takim rozwiązaniem zdaje się być radar.
Źródło:
Annual of Navigation; 2015, 22; 79-86
1640-8632
Pojawia się w:
Annual of Navigation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wybrane zagadnienia pozycjonowania kołowego minirobota mobilnego
Some Apects of Positioning of Mobile Minirobot
Autorzy:
Giergiel, M.
Małka, P.
Powiązania:
https://bibliotekanauki.pl/articles/158146.pdf
Data publikacji:
2005
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
positioning
mobile minirobot
Opis:
W artykule przedstawiono zbudowany w katedrze Robotyki i Dynamiki maszyn AGH minirobot mobilny MRM. Zaprezentowano jego ogólną budowę, możliwości jezdne oraz metodę programowania. Dzięki zastosowaniu sensorów położenia pokazano wyniki weryfikacji obiektu w warunkach rzeczywistych.
The article demonstrate mobile minirobot built in Department of Robotics and Machine Dynamics, AGH. Presented his general building, driven possibilities and method of programming. The results of verification of object were got applying appropriate sensors.
Źródło:
Pomiary Automatyka Kontrola; 2005, R. 51, nr 5, 5; 28-30
0032-4140
Pojawia się w:
Pomiary Automatyka Kontrola
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Context aware handover algorithms for mobile positioning systems
Autorzy:
Khan, S. Z.
Silvadorai, T.
Chen-Wei, T.
Ramadass, S.
Anwar, T.
Powiązania:
https://bibliotekanauki.pl/articles/305772.pdf
Data publikacji:
2014
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
handover among mobile positioning systems
power efficient mobile positioning
switching between indoor and outdoor positioning systems
Opis:
This work proposes context aware handover algorithms for mobile positioning systems. The algorithms perform handover among positioning systems based on important contextual factors related to position determination with efficient use of battery. The proposed solution is implemented in the form of an Android application named Locate@nav6. The performance of the proposed solution was tested in selected experimental areas. The handover performance was compared with other existing location applications. The proposed solution performed correct handover among positioning systems in 95 percent of cases studied while two other applications performed correct handover in only 50 percent of cases studied. Battery usage of the proposed solution is less than one third of the battery usage of two other applications. The analysis of the positioning error of the applications demonstrated that, the proposed solution is able to reduce positioning error indirectly by handing over the task of positioning to an appropriate positioning system. This kept the average error of positioning below 42.1 meters for Locate@nav6 while the average error for two other applications namely Google Latitude and Malaysia maps was between 92.7 and 171.13 meters.
Źródło:
Computer Science; 2014, 15 (2); 133-158
1508-2806
2300-7036
Pojawia się w:
Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
GNSS positioning error change-point detection in GNSS Positioning Performance Modelling
Autorzy:
Filić, M.
Filjar, R.
Powiązania:
https://bibliotekanauki.pl/articles/117469.pdf
Data publikacji:
2019
Wydawca:
Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:
Global Navigation Satellite System (GNSS)
positioning
Navigation and Timing (PNT)
GNSS Positioning Performance Modelling
GNSS Positioning Error Change-point Detection
GNSS Positioning Performance
GNSS Resilience
GNSS Utilisation Risk Mitigation
GNSS Positioning Performance Degradation
Opis:
Provision of uninterrupted and robust Positioning, Navigation, and Timing (PNT) services is essential task of Global Navigation Satellite Systems (GNSS) as an enabling technology for numerous technology and socio-economic applications, a cornerstone of the modern civilisation, a public goods, and an essential component of a national infrastructure. GNSS resilience may be accomplished only with complete understanding of the causes of GNSS positioning performance disruptions and degradations, presented in a form of applications- and scenarios-related models. Here the application of change-point detection methods is proposed and demonstrated in a selected scenario of a fast-developing ionospheric storm’s impact on GNSS positioning performance, as a novel contribution to forecasting GNSS positioning performance model development and GNSS utilisation risk mitigation.
Źródło:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2019, 13, 3; 575-579
2083-6473
2083-6481
Pojawia się w:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Modern methods of underwater positioning applied in subsea mining
Współczesne metody pozycjonowania obiektów podwodnych stosowane w górnictwie morskim
Autorzy:
Tomczak, A.
Powiązania:
https://bibliotekanauki.pl/articles/350628.pdf
Data publikacji:
2011
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
systemy akustyczne
pozycjonowanie podwodne
LBL
USBL
underwater positioning systems
acoustic positioning
Opis:
The project of subsea exploration is a long lasting and complex process. In most of the cases the underwater operations are connected with hydrographic and construction surveys that is equivalent of geodetic survey on shore. In the industry the need of constant monitoring of underwater activity such as tracking of autonomous robots and elements of infrastructures exist. It is possible by means of underwater acoustic positioning systems. The paper presents modern underwater positioning methods widely used in offshore mining sector in the aspect of system principles, measured navigation parameters and their achievable accuracy. The underwater LBL (Long Baseline) acoustic spoolpiece (segment of pipe joining the manifold and well) metrology was described and the necessary steps to have LBL system ready for logging session such as calibration of an array of transponders (baseline calibration) and finding grid coordinates of transponders in array (box in calibration). In the summary the present research directions in the field of underwater positioning were appointed.
Projekt eksploracji zasobów dna morskiego jest procesem długotrwałym i skomplikowanym. Większości operacji wykonywanych pod powierzchnią wody towarzyszą pomiary będące odpowiednikiem lądowych pomiarów geodezyjnych i topograficznych. Dodatkowo istnieje potrzeba monitorowania ruchu elementów instalowanej infrastruktury oraz robotów podwodnych, które wykonują większość prac, szczególnie na dużych głębokościach. Wyznaczanie pozycji pod wodą możliwe jest dzięki zastosowaniu hydroakustycznych systemów pozycjonowania podwodnego. W artykule dokonano syntetycznej prezentacji technik pozycjonowania podwodnego obecnie stosowanych w górnictwie morskim w aspekcie zasady działania, metody wyznaczania parametru nawigacyjnego oraz uzyskiwanych dokładności. Przedstawiono przebieg wykonania metrologii podwodnej polegającej na pomiarach przeprowadzonych techniką pozycjonowania akustycznego LBL (Long Baseline). Scharakteryzowano zadanie jakim jest metrologia odcinka rurociągu podwodnego łączącego manifold i głowicę odwiertu. Wyszczególniono kluczowe procedury pomiarowe takie jak kalibracja lokalnej sieci geodezyjnej utworzonej przez transpondery na dnie oceanu oraz metodę wyznaczania absolutnych współrzędnych transponderów LBL z wykorzystaniem pomiarów odległości z jednostki nawodnej pozycjonowanej systemem GNSS (Global Navigation Satellite System). W podsumowaniu opisano kierunki badań nad rozwojem systemów pozycjonowania podwodnego, z uwzględnieniem systemów akustycznych.
Źródło:
Górnictwo i Geoinżynieria; 2011, 35, 4/1; 381-394
1732-6702
Pojawia się w:
Górnictwo i Geoinżynieria
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Nostalgia and Culture: The Relationship Between Indicators of Acculturation and Nostalgia
Autorzy:
Awicha Amina, Borsali
Abderrezak, Benhabib
Powiązania:
https://bibliotekanauki.pl/articles/2012484.pdf
Data publikacji:
2018
Wydawca:
Uniwersytet Warszawski. Wydawnictwo Naukowe Wydziału Zarządzania
Tematy:
nostalgic brands
positioning
acculturation
Opis:
In this article we test the relationship between indicators of acculturation (language, media, selfidentification, religion, food and clothing) and nostalgia. It checks empirically, on a sample of 201, the existence of a significant effect between our independent variables and our dependent variable. The results of analysis of variance, One-Way Anova, reveal that the home language, the food of home country, the media, self-identification with the origin country and the religion of the origin country have a signifi cant impact on nostalgia. This article contributes to new theoretical elements in the field of nostalgia and culture as a complement of several previous studies. The managerial contributions of this study focus on positioning of nostalgic brands and developing marketing strategies for this kind of products.
Źródło:
Journal of Marketing and Consumer Behaviour in Emerging Markets; 2018, 1(7); 28-47
2449-6634
Pojawia się w:
Journal of Marketing and Consumer Behaviour in Emerging Markets
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Possibilities of more accurate navigation with the utilization of new solutions in radar technology
Autorzy:
Felski, A.
Powiązania:
https://bibliotekanauki.pl/articles/135204.pdf
Data publikacji:
2015
Wydawca:
Akademia Morska w Szczecinie. Wydawnictwo AMSz
Tematy:
radar
positioning
accuracy
solid state radar
resilent positioning and time system
Opis:
Many radio-navigation systems dating from the seventies and eighties of the last century were replaced by a single Global Positioning System (GPS) a dozen or so years ago. However, for several years the opinion that the GPS monopoly is becoming dangerous has been expressed increasingly often in navigational literature. Even when supplemented with other systems from this group, such as Global Navigational Satellite Systems (GNSS), it cannot be treated as the source of reliable and universally accessible navigational information. This results from the similar sensibility of all GNSS systems to the same disturbances as a consequence of using a similar band of radiofrequencies and a similarly low powered signal. There is a growing recognition in the maritime world that GNSS will not provide the resilience required because of these common vulnerabilities. The World Wide Radio Navigation System should be seen as a combination of systems, which can cooperate and work effectively even when GNSS does not work. Lately different authors commonly point-out the potential advantages of a modified Loran (e-Loran), however it still remains only a potential option – particularly in the southern hemisphere, where this system has never existed. Meanwhile as the general threat of the disturbance of GNSS systems increases, the matter of initiating alternative possibilities becomes more urgent. A proposal which combines lower financial outlays with adjustments to the existing techniques and the law in force is desirable. In this context radar seems to be the attractive option, however for utilization as an alternative to GNSS it should reach considerably higher technical performances. In the paper the general limitations in the use of existing radar as a means of ships’ positioning are presented, and information published about the investigation into the methods for overcoming these limitations is discussed. The accessible information appears to prove that a greater accuracy of position can be achieved with modified radar in the future, especially if the suitable navigational infrastructure is present on shore. However, the level of accuracy of this method does not seem to compare favorably with GNSS.
Źródło:
Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2015, 44 (116); 57-60
1733-8670
2392-0378
Pojawia się w:
Zeszyty Naukowe Akademii Morskiej w Szczecinie
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Impact of Developed Polynominal on Accuracy of Setting Down a Positions Coordinates Based on Measurements of Two Bearings
Autorzy:
Narloch, A.
Kołaczyński, S.
Powiązania:
https://bibliotekanauki.pl/articles/320514.pdf
Data publikacji:
2017
Wydawca:
Polskie Forum Nawigacyjne
Tematy:
accuracy
navigation
positioning
terrestrial
Opis:
An attempt to determine the impact of developing polynomial on the accuracy of setting down a ship's position coordinates based on measurements of two bearings has been ventured in this paper. A navigation structure consisting of two aids has been analysed. A ship maneuvering within a given area was setting down her position in respect to them. As a result of this, numeral accuracy indexes were calculated. They gave principles for conclusions regarding the impact of the distance between the aids of navigation on the accuracy of setting down the position’s coordinates.
W artykule podjęto próbę ustalenia wpływu rozwijanego wielomianu na dokładność wyznaczenia współrzędnych pozycji z pomiaru dwóch namiarów. Analizie poddano strukturę nawigacyjną składającą się z dwóch znaków nawigacyjnych, względem których jednostka manewrująca na zadanym obszarze wyznaczała swoją pozycję. W następstwie tego wyliczono liczbowe wskaźniki dokładnościowe. Dały one podstawę do wyprowadzenia wniosków na temat wpływu odległości między znakami na dokładność wyznaczania współrzędnych pozycji.
Źródło:
Annual of Navigation; 2017, 24; 103-117
1640-8632
Pojawia się w:
Annual of Navigation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
EGNOS-Based GNSS receiver for precise positioning in restricted areas
Autorzy:
Demkowicz, J.
Bikonis, K.
Powiązania:
https://bibliotekanauki.pl/articles/331610.pdf
Data publikacji:
2016
Wydawca:
Polskie Towarzystwo Akustyczne
Tematy:
EGNOS
GNSS
positioning accuracy
Opis:
Positioning accuracy is very important in many areas, whereas the typical GPS receiver accuracy is often not sufficient. The European Geostationary Navigation Overlay Service (EGNOS), Europe’s first venture into satellite navigation, improves the open public service offered by the Global Positioning System (GPS). As a satellite navigation augmentation system, EGNOS improves the accuracy of GPS by providing a positioning accuracy to within 3 meters. In this paper we present GNSS receivers based on EGNOS, dedicated for precise positioning in restricted areas of continental shelf performance. The article presents some results regarding position accuracy, obtained for a few receivers in that context.
Źródło:
Hydroacoustics; 2016, 19; 65-73
1642-1817
Pojawia się w:
Hydroacoustics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Dynamic ship positioning based on hydroacoustic systems
Autorzy:
Stateczny, A.
Szulc, D.
Powiązania:
https://bibliotekanauki.pl/articles/331963.pdf
Data publikacji:
2003
Wydawca:
Polskie Towarzystwo Akustyczne
Tematy:
ship positioning
hydroacoustic systems
Opis:
The Article describes the concept for development of a dynamic ship positioning system based on the information provided by hydroacoustic systems. It is the first presentation for the wide audience of a modern method for determination of position using modern measuring and processing technology where the hydroacoustic wave is the carrier of information.
Źródło:
Hydroacoustics; 2003, 6; 199-204
1642-1817
Pojawia się w:
Hydroacoustics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The problem of GNSS positioning with measurements recorded using Android mobile devices
Autorzy:
Skorupa, Bogdan
Powiązania:
https://bibliotekanauki.pl/articles/390008.pdf
Data publikacji:
2019
Wydawca:
Politechnika Lubelska. Wydawnictwo Politechniki Lubelskiej
Tematy:
GNSS
Android
positioning
pozycjonowanie
Opis:
The current work presents the issue of determining the position of the observer using measurements registered with GNSS (Global Navigation Satellite System) receivers that Android mobile devices are equipped with. The discussed questions concern using GNSS measurement data, which have been made available in the Android system since version 7.0. The present paper has the character of a review. It demonstrates how measurement data can be obtained via Application Programming Interface. Moreover, it discusses the available software that can be for registering measurements and their initial analysis. Subsequently, it reviews scientific works concerning the problem of positioning with the use of smartphones. Special emphasis was placed on tests consisting in an analysis of phase observations registered using dual-frequency receivers. The summary of the article presents the prospects for using mobile devices in precise point positioning. It also points out the limitations to achieving high accuracy and reliability of such measurements.
Źródło:
Budownictwo i Architektura; 2019, 18, 3; 51-62
1899-0665
Pojawia się w:
Budownictwo i Architektura
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Badania dokładności pozycjonowania pionowego centrum obróbkowego
Assessing the positioning accuracy in vertical milling centres
Autorzy:
Miko, E.
Jarema, M.
Powiązania:
https://bibliotekanauki.pl/articles/155415.pdf
Data publikacji:
2010
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
obrabiarka CNC
dokładność pozycjonowania
powtarzalność pozycjonowania
CNC machine
positioning accuracy
positioning repeatability
Opis:
Przeprowadzono analizę układu odczytu pozycji w osiach X, Y i Z pionowego centrum obróbkowego. W pomiarach wykorzystano płytki wzorcowe, jako wzorzec długości oraz układ rejestrujący składający się ze sterownika obrabiarki oraz sondy pomiarowej stanowiącej wyposażenie dodatkowe. Obliczenia przeprowadzono zgodnie z PN -ISO 230-2. Stwierdzono, że w przypadku pomiarów dokładności i powtarzalności pozycjonowania testowana obrabiarka spełnia parametry deklarowane przez producenta a nawet znacznie je przewyższa. Bardzo dobre wyniki osiągnięto podczas badania powtarzalności pozycjonowania. Tak wysoki poziom powtarzalności (zaobserwowany 0,0016mm, deklarowany 0,005mm) autorzy tłumaczą tym, że testowana obrabiarka jest maszyną praktycznie nową. Badania przeprowadzono po 6 miesiącach używania obrabiarki w warunkach laboratoryjnych. Zastosowana metoda badawcza może być wykorzystywana do przeprowadzania okresowych kontroli stanu obrabiarek CNC pod kątem dokładności i powtarzalności pozycjonowania.
The paper analyzes the accuracy of a readout system measuring the positions of a vertical milling centre along the X-, Y- and Z- axes. The tests were conducted using gauge blocks as length standards and a measuring system including a machine tool controller and an optional touch probe. The calculations were performed in accordance with the PN -ISO 230-2 standard. With regard to the accuracy and repeatability of positioning, the vertical milling centre meets or even exceeds the parameters set by the producer. Very good results were achieved particularly during the repeatability tests. The high level of repeatability of up to 0.0016mm, which is much more than the declared value 0.005, is probably due to the fact that the milling centre is new. The tests were conducted after six months of use under laboratory conditions. The method applied during the tests is suitable for periodic inspection of CNC machine tools when checking the accuracy and repeatability of positioning.
Źródło:
Pomiary Automatyka Kontrola; 2010, R. 56, nr 1, 1; 63-65
0032-4140
Pojawia się w:
Pomiary Automatyka Kontrola
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
EGNOS Status and Performance in the Context of Marine Navigation Requirements
Autorzy:
Cydejko, J.
Powiązania:
https://bibliotekanauki.pl/articles/116957.pdf
Data publikacji:
2008
Wydawca:
Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:
Global Navigation Satellite System (GNSS)
EGNOS
Marine Navigation Requirements
positioning system
Satellite Positioning
Maritime Transport Requirements
Positioning Performance
Polish Coast
Opis:
The current status of EGNOS (December 2006) is described as Initial Operations Phase and the EGNOS Open Service is just about to be formally declared as available for non-safety of life service. In meanwhile the EGNOS Signal in Space is provided almost in its nominal level and delivering, when available, the nominal system performance. New positioning technologies, such as EGNOS in Europe, create a new quality in marine navigation and bring further improvement of the maritime transport safety. It may be expected that very soon EGNOS will find significant interest among the maritime community serving as the augmentation system in the maritime transport applications of GNSS. The paper discusses the EGNOS status and the expected EGNOS performance in the context of marine navigation requirements. The system performance analysis is backed with the study of the various field tests results where the EGNOS positioning performance was verified by author in the experimental way.
Źródło:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2008, 2, 3; 229-234
2083-6473
2083-6481
Pojawia się w:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Fractional Order Dynamic Positioning Controller
Autorzy:
Witkowska, A.
Powiązania:
https://bibliotekanauki.pl/articles/117405.pdf
Data publikacji:
2015
Wydawca:
Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:
Marine Controllers
Dynamic Positioning Controller
Dynamic Positioning (DP)
PID Controller
Ship Control System
fractional order
Dynamic Positioning System
DP Vessel
Opis:
Improving the performance of Dynamic Positioning System in such applications as station keeping, position mooring and slow speed references tracking requires improving the position and heading control precision. These goals can be achieved through the improvement of the ship control system. Fractional-order calculus is a very useful tool which extends classical, integer-order calculus and is used in contemporary modeling and control applications. Fractional-order PI?D? controller, based on the added flexibility of fractional-order operators, are capable of superior performance compared to their integer-order counterparts. This paper presents the fractional order PI?D? controller designed to maintain the ship position and heading and the results were compared with classical integer order PID controller.
Źródło:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2015, 9, 3; 399-404
2083-6473
2083-6481
Pojawia się w:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Position reference systems for off shore vessels
Autorzy:
Pawelski, J.
Powiązania:
https://bibliotekanauki.pl/articles/393745.pdf
Data publikacji:
2016
Wydawca:
Polskie Stowarzyszenie Telematyki Transportu
Tematy:
dynamic positioning
offshore
positioning system
data transfer
dynamiczne pozycjonowanie
system pozycjonowania
transfer danych
Opis:
Dynamic positioning (DP) system is an automatic system allowing vessel to keep position or move along predetermined track using solely own propellers and thrusters. Position reference systems provide very accurate position of vessel in relation to chosen points which is the key element of DP operations. Systems made by diff erent manufactures they have to use standardized data exchange protocols for proper communication.
Źródło:
Archives of Transport System Telematics; 2016, 9, 4; 17-21
1899-8208
Pojawia się w:
Archives of Transport System Telematics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analiza geometrycznej dokładności pozycjonowania efektora manipulatora równoległego przestrzennego typu Triplanar
Analysis of the geometrical accuracy of the positioning of the effector of the parallel manipulator spatial type Triplanar
Autorzy:
Kuźmierowski, T.
Powiązania:
https://bibliotekanauki.pl/articles/386370.pdf
Data publikacji:
2010
Wydawca:
Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej
Tematy:
manipulator
efektor
pozycjonowanie
effector
positioning
Opis:
W artykule przedstawiono analizę geometrycznej dokładności pozycjonowania efektora manipulatora typu triplanar. Konstrukcja ta jest manipulatorem równoległym przestrzennym z efektorem o sześciu stopniach swobody. Autor przedstawia badania symulacyjne i stanowiskowe geometrycznej dokładności pozycjonowania efektora w funkcji wysokości punktu pracy dla wybranych parametrów konfiguracyjnych manipulatora.
The article presents an analysis of geometric accuracy of the positioning of the effector of the triplanar manipulator. This construction is a spatial parallel manipulator with effector of six degrees of freedom. The author presents the simulation and workplace examinations of the geometric accuracy of positioning in the functions of the height of the point of the work for chosen manipulator’s configuration parameters.
Źródło:
Acta Mechanica et Automatica; 2010, 4, 1; 52-55
1898-4088
2300-5319
Pojawia się w:
Acta Mechanica et Automatica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Performance analysis of GPS/BDS integrated precise positioning system considering visibility of satellites
Autorzy:
Noh, Jae Hee
Jo, Gwang Hee
Lim, Deok Won
Lee, Jin Hyuk
Lee, Sun Yong
Lee, Sang Jeong
Powiązania:
https://bibliotekanauki.pl/articles/320929.pdf
Data publikacji:
2019
Wydawca:
Polskie Forum Nawigacyjne
Tematy:
BDS
precise positioning
urban canyon
Opis:
Research on precise positioning is being actively carried out to provide accurate position information for land transportation. The most significant problem when performing precise positioning in urban canyon is the degradation of performance due to the lack of visible satellites. Prior to open service of BDS, most of the studies on positioning were focused on using GPS/GLONASS integrated navigation system. Since BDS began open service, studies using GPS/BDS have been actively performed in the Asia-Pacific region as it became possible to acquire enough available BDS satellites. The average number of visible satellites in Korea is 9 for GPS and 14 for BDS. In this paper, we analyze the availability of precise positioning using BDS in urban canyon. To do this, we simulate the urban canyon environment by applying the mask to the azimuth and the elevation. We analyze the positioning accuracy using two simulation scenarios. From the results, it is shown that the accuracy of precise positioning in the case where the satellites in the east-west direction are blocked is lowered than that in the case where the satellites in the south-north direction are blocked for the same elevation mask angle. This result comes from the fact that the PDOP increases when the satellites are blocked in the east-west direction. Also, it can be confirmed that the GPS/BDS integrated positioning is available for the high mask angle while the GPS-only positioning is not possible continuously.
Źródło:
Annual of Navigation; 2019, 26; 65-75
1640-8632
Pojawia się w:
Annual of Navigation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Shared Value Creation And Marketing
Autorzy:
Tkaczyk, Jolanta
Krzyżanowska, Magdalena
Powiązania:
https://bibliotekanauki.pl/articles/417406.pdf
Data publikacji:
2014-12-15
Wydawca:
Akademia Leona Koźmińskiego w Warszawie
Tematy:
shared value
marketing
positioning
retail
Opis:
Purpose: The aim of the paper is to test whether and to what extent the concept of CSV can be utilized in the marketing strategy of companies, and more precisely, whether and to what extent it can be used as a criterion for positioning the company in the market. Methodology: The authors analysed the case of the Partnership for Health from the perspective of one partner, grocery retailer Biedronka. In addition, we have conducted consumer research among students to find out if consumers have a positive perception of products with a social mission. Findings: The research findings indicate that, according to the respondents’ perception, products with a social mission could comprise a basis for a positioning strategy for Biedronka, but for now, many customers do not even know that Biedronka offers such products in cooperation with its partners. The lack of a promotional campaign aimed at educating buyers had a negative impact on project awareness. It can even be stated that its potential wasn’t exploited from a marketing viewpoint. Research limitations/implications: The major limitation of the conducted research is the sampling procedure. The authors introduced their own scale for measuring the consumers’ approach to products with social missions. This scale can also be used for implementation of similar projects. Originality: In the subject literature there is a cognitive gap connected with the use of CSV concept in corporate marketing strategies. The authors determined how this concept could be used in marketing with special regard to the positioning strategy. Additionally a special scale was designed for measuring consumers’ approaches to products with a social mission.
Źródło:
Management and Business Administration. Central Europe; 2014, 22, 4; 153-167
2084-3356
Pojawia się w:
Management and Business Administration. Central Europe
Dostawca treści:
Biblioteka Nauki
Artykuł
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