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    Wyświetlanie 1-13 z 13
    Tytuł:
    An Interactive Graphical User Interface Module for Soldier Health and Position Tracking System
    Autorzy:
    Swedan, Wesam F.
    Al Issa, Huthifa A.
    Aloqoul, Ayat
    Alkofahi, Hadeel
    Obeidat, Rahaf
    Powiązania:
    https://bibliotekanauki.pl/articles/2124771.pdf
    Data publikacji:
    2022
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    graphical user interface
    global positioning system
    global system for mobile
    bioinformatics
    tracking system
    Opis:
    Soldiers are the backbone of any armed force. They usually lose their lives due to the lack of medical assistance in emergency situations. Furthermore, army bases face problems due to the inability to track soldiers’ locations in the field. Hence, this paper proposes an interactive graphical user interface module (IGUIM) for soldiers’ bioinformatics acquisition and emergency reaction during combat, a global positioning system (GPS) is used to track soldiers’ locations through a device carried by the soldier. Soldiers’ bioinformatics are gathered using health monitoring biosensors, bidirectional communication between the soldiers and the army base is established via a global system for mobile (GSM). The proposed interactive module aims to enumerate the soldiers on the battlefield within a database that easily facilitates health monitoring, position tracking and bidirectional communication with each soldier through their identification number. The proposed IGUIM will increase the rate of soldiers’ survival in emergencies, which contributes to preserving the human resources of the army during combat.
    Źródło:
    International Journal of Electronics and Telecommunications; 2022, 68, 3; 571-571
    2300-1933
    Pojawia się w:
    International Journal of Electronics and Telecommunications
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    An influence of the covariance between single orbit parameters on the accuracy of observations of the pseudo-ranges and phase differences
    Autorzy:
    Skeivalas, Jonas
    Paršeliūnas, Eimuntas
    Putrimas, Raimundas
    Šlikas, Dominykas
    Powiązania:
    https://bibliotekanauki.pl/articles/221830.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Global Positioning System
    ephemeris
    Doppler effect
    dispersion
    geodesy
    Opis:
    The possibilities to improve values of the satellite orbit elements by employing the pseudo-ranges and differences of carrier phase frequencies measured at many reference GPS stations are analysed. An improvement of orbit ephemeris is achieved by solving an equation system of corrections of the pseudo-ranges and phase differences with the least-squares method. Also, equations of space coordinates of satellite orbit points expressed by ephemeris at fixed moments are used. The relation between the accuracy of the pseudo-ranges and phase differences and the accuracy of the satellite ephemeris is analysed. Formulae for estimation of the influence of the ephemeris on the measured pseudo-ranges and phase differences and for prediction of the accuracy of the pseudo-ranges and phase differences were obtained. An influence of the covariance between single orbit parameters on the accuracy of the pseudo-ranges and phase differences is detected.
    Źródło:
    Metrology and Measurement Systems; 2020, 27, 1; 131-140
    0860-8229
    Pojawia się w:
    Metrology and Measurement Systems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Experimental studies on the relationship between HDOP and position error in the GPS system
    Autorzy:
    Specht, Mariusz
    Powiązania:
    https://bibliotekanauki.pl/articles/2052120.pdf
    Data publikacji:
    2022
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Global Positioning System
    GPS
    Horizontal Dilution of Precision
    HDOP
    position error
    Opis:
    2D position error in the Global Positioning System GPS depends on the horizontal dilution of precision (HDOP) and User Equivalent Range Error UERE. The non-dimensional HDOP coeffcient, determining the influence of satellite distribution on the positioning accuracy, can be calculated exactly for a given moment in time. However, the UERE value is a magnitude variable in time, especially due to errors in radio propagation (ionosphere and troposphere effects) and it cannot be precisely predicted. The variability of the UERE causes the actual measurements (despite an exact theoretical mathematical correlation between the HDOP value and the position error) to indicate that position errors differ for the same HDOP value. The aim of this article is to determine the relation between the GPS position error and the HDOP value. It is possible only statistically, based on an analysis of an exceptionally large measurement sample. To this end, measurement results of a 10-day GPS measurement campaign (900,000 fixes) have been used. For HDOP values (in the range of 0.6-1.8), position errors were recorded and analysed to determine the statistical distribution of GPS position errors corresponding to various HDOP values. The experimental study and statistical analyses showed that the most common HDOP values in the GPS system are magnitudes of: 0.7 ( = 0.353) and 0.8 ( = 0.432). Only 2.77% of fixes indicated an HDOP value larger than 1. Moreover, 95% of measurements featured a geometric coeffcient of 0.973 - this is why it can be assumed that in optimal conditions (without local terrain obstacles), the GPS system is capable of providing values of HDOP ≤ 1, with a probability greater than 95% (2). Obtaining a low HDOP value, which results in a low GPS position error value, calls for providing a high mean number of satellites (12 or more) and low variability in their numer.
    Źródło:
    Metrology and Measurement Systems; 2022, 29, 1; 17-36
    0860-8229
    Pojawia się w:
    Metrology and Measurement Systems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Application of satellite techniques in geodesy and navigation in Poland
    Autorzy:
    Baran, Lubomir W.
    Oszczak, Stanisław
    Zieliński, Janusz B.
    Powiązania:
    https://bibliotekanauki.pl/articles/703201.pdf
    Data publikacji:
    2008
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    geodesy
    reference frame
    Global Positioning System – GPS
    satellite techniques
    satellite navigation
    Galileo navigation system
    Opis:
    Contemporary geodesy is of global dimension. The reference frame is defined as the geocentric system with parameters related to the entire Earth body, e.g. the axis of rotation, and global geoid. The unified time scale is determined for the whole Earth territory as well. International services using different satellite techniques are engaged in the determination of this frame. Particularly important is the Global Positioning System GPS, which is the most important geodetic tool nowadays. In Poland a number of geodetic observatories are working in the frame of the international networks, Polish scientific groups contribute to the advancement of science in this domain. For the practical applications we are using the local networks that again are constructed with satellite techniques. In Europe the regional network EUREF exists while its part EUREF-POL and densification POLREF are in Poland. The modern network ASG-EUPOS is under construction. The GPS technique is used for surveying and navigation and for the positioning in motion, which is in-between the preceding traditional methods. Differential augmentation methods are designed to improve GPS signals such as DGPS and EGNOS. The new European satellite navigation system Galileo is in development. Poland is a member and coowner of this system. A number of Polish research institutions are working on new methods of the practical application of GNSS.
    Źródło:
    Nauka; 2008, 4
    1231-8515
    Pojawia się w:
    Nauka
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Estimation of Flight Path Deviations for SAR Radar Installed on UAV
    Autorzy:
    Łabowski, M.
    Kaniewski, P.
    Konatowski, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/221533.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Unmanned Aerial Vehicle
    Synthetic Aperture Radar
    inertial measurement unit
    Global Navigation Satellite System
    Opis:
    The paper presents a method of calculation of position deviations from a theoretical, nominally rectilinear trajectory for a SAR imaging system installed on board of UAV. The UAV on-board system consists of a radar sensor, an antenna system, a SAR processor and a navigation system. The main task of the navigation part is to determine the vector of differences between the theoretical and the measured trajectories of UAV center of gravity. The paper includes chosen results of experiments obtained during ground and flight tests.
    Źródło:
    Metrology and Measurement Systems; 2016, 23, 3; 383-391
    0860-8229
    Pojawia się w:
    Metrology and Measurement Systems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    New threat to global transport. GNSS receiver spoofing
    Autorzy:
    Gucma, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/224112.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    GNSS Receiver
    Global Navigation Satellite System
    signal spoofing
    anti-spoofing technique
    global transport
    threats
    GNSS
    komunikacja globalna
    zagrożenia
    Opis:
    Transport and logistics in XXI century relies on the several technical systems for assuring safe and reliable operations. One of widely used systems are satellite positioning systems, used to monitoring transport means and cargo itself. Reliability of the whole transport chain is often combined with singular reliability of satellite monitoring system. Possible threats to precise positioning of any vehicle is GNSS (Global Navigation Satellite System) deliberate interference. So called spoofing interference can mislead receiver in transport objective for reporting entirely wrong position and timing. To fight with this phenomena’s antispoofing techniques are developed. This paper will provide a review of late researches in field of GNSS anti-spoofing on the side of receiver. GNSS receiver vulnerabilities for a spoofer (device) attack will be presented as well as anti-spoofing algorithms. Possible limitation, costs as well as countermeasures methods will be shown thoroughly. Some of recent trends in anti-spoofing techniques in the world will be outlined up to date.
    Źródło:
    Archives of Transport; 2015, 35, 3; 7-14
    0866-9546
    2300-8830
    Pojawia się w:
    Archives of Transport
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Estimation of UAV Position with Use of Smoothing Algorithms
    Autorzy:
    Kaniewski, P.
    Gil, R.
    Konatowski, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/221380.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Unmanned Aerial Vehicle
    Inertial Navigation System
    Global Navigation Satellite System
    Integrated Navigation System
    Synthetic Aperture Radar
    Kalman Filter
    smoothing algorithm
    Opis:
    The paper presents methods of on-line and off-line estimation of UAV position on the basis of measurements from its integrated navigation system. The navigation system installed on board UAV contains an INS and a GNSS receiver. The UAV position, as well as its velocity and orientation are estimated with the use of smoothing algorithms. For off-line estimation, a fixed-interval smoothing algorithm has been applied. On-line estimation has been accomplished with the use of a fixed-lag smoothing algorithm. The paper includes chosen results of simulations demonstrating improvements of accuracy of UAV position estimation with the use of smoothing algorithms in comparison with the use of a Kalman filter.
    Źródło:
    Metrology and Measurement Systems; 2017, 24, 1; 127-142
    0860-8229
    Pojawia się w:
    Metrology and Measurement Systems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    National Mechanical Engineering in Conditions of Economic Globalization
    Autorzy:
    Ishchuk, Svitlana
    Sozanskyy, Luybomyr
    Powiązania:
    https://bibliotekanauki.pl/articles/2201162.pdf
    Data publikacji:
    2022
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    global-range economic system
    regional-range economic system
    transnational business modeling
    descriptive analytic
    economic model
    economic globalization
    national mechanical engineering
    transnational corporation
    indicator
    Opis:
    The study was conducted to assess and substantiate the key systemic problems of the national engineering of different countries in the context of economic globalization. To achieve this goal, the study used the author’s method to assess the dependence of mechanical engineering in Ukraine, Poland and Germany on imports of intermediate goods. According to the results, it was determined that in the periods of increasing economic globalization of mechanical engineering in Ukraine, Poland and Germany has undergone systemic destructive changes and is in a threatening state, from the standpoint of economic security. In particular, in Ukrainian and Polish mechanical engineering, the dependence on imports of high-tech intermediate goods is excessively high. In contrast, German engineering, unlike Ukraine’s and Poland’s, is less dependent on imports of high-tech products, but requires much more resource-intensive intermediate goods. It is analytically substantiated that the identified problems with the import dependence of mechanical engineering in Ukraine, Poland and Germany are the result of irrational, one-sided perception of economic globalization by the main economic entities of these countries.
    Źródło:
    Management and Production Engineering Review; 2022, 13, 4; 107--125
    2080-8208
    2082-1344
    Pojawia się w:
    Management and Production Engineering Review
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A review of the importance of synchrophasor technology, smart grid, and applications
    Autorzy:
    Baba, Maveeya
    Nor, Nursyarizal B.M.
    Sheikh, Aman
    Nowakowski, Grzegorz
    Masood, Faisal
    Rehman, Masood
    Irfan, Muhammad
    Arefin, Ahmed Amirul
    Kumar, Rahul
    Baba, A. Momin
    Powiązania:
    https://bibliotekanauki.pl/articles/2173713.pdf
    Data publikacji:
    2022
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    phasor measurement unit
    PMU
    micro-PMU
    Global Positioning System
    GPS
    optimal PMU placement
    smart grid
    SG
    jednostka pomiaru fazorów
    mikro-PMU
    globalny system pozycjonowania
    optymalne rozmieszczenie PMU
    sieć inteligentna
    Opis:
    The electrical network is a man-made complex network that makes it difficult to monitor and control the power system with traditional monitoring devices. Traditional devices have some limitations in real-time synchronization monitoring which leads to unwanted behavior and causes new challenges in the operation and control of the power systems. A Phasor measurement unit (PMU) is an advanced metering device that provides an accurate real-time and synchronized measurement of the voltage and current waveforms of the buses in which the PMU devices are directly connected in the grid station. The device is connected to the busbars of the power grid in the electrical distribution and transmission systems and provides time-synchronized measurement with the help of the Global Positioning System (GPS). However, the implementation and maintenance cost of the device is not bearable for the electrical utilities. Therefore, in recent work, many optimization approaches have been developed to overcome optimal placement of PMU problems to reduce the overall cost by providing complete electrical network observability with a minimal number of PMUs. This research paper reviews the importance of PMU for the modern electrical power system, the architecture of PMU, the differences between PMU, micro-PMU, SCADA, and smart grid (SG) relation with PMU, the sinusoidal waveform, and its phasor representation, and finally a list of PMU applications. The applications of PMU are widely involved in the operation of power systems ranging from power system control and monitor, distribution grid control, load shedding control and analyses, and state estimation which shows the importance of PMU for the modern world.
    Źródło:
    Bulletin of the Polish Academy of Sciences. Technical Sciences; 2022, 70, 6; art. no. e143826
    0239-7528
    Pojawia się w:
    Bulletin of the Polish Academy of Sciences. Technical Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Global stability of positive standard and fractional nonlinear feedback systems
    Autorzy:
    Kaczorek, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/200986.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    global stability
    fractional order
    positive
    nonlinear system
    Opis:
    The global stability of positive continuous-time standard and fractional order nonlinear feedback systems is investigated. New sufficient conditions for the global stability of these classes of of positive nonlinear systems are established. The effectiveness of these new stability conditions is demonstrated on simple examples of positive nonlinear systems.
    Źródło:
    Bulletin of the Polish Academy of Sciences. Technical Sciences; 2020, 68, 2; 285-288
    0239-7528
    Pojawia się w:
    Bulletin of the Polish Academy of Sciences. Technical Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Global stability of nonlinear feedback systemswith positive descriptor linear parts
    Autorzy:
    Kaczorek, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/200005.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    global stability
    positive descriptor
    nonlinear
    feedback system
    globalna stabilność
    nieliniowość
    system informacji zwrotnej
    Opis:
    The global (absolute) stability of nonlinear systems with negative feedbacks and positive descriptor linear parts is addressed. Transfer matrices of positive descriptor linear systems are analyzed. The characteristics u = f (e) of the nonlinear parts satisfy the condition k1e ≤ f (e) ≤ k2e for some positive k1, k2. It is shown that the nonlinear feedback systems are globally asymptotically stable if the Nyquist plots of the positive descriptor linear parts are located in the right-hand side of the circles (– 1/k1, – 1/k2).
    Źródło:
    Bulletin of the Polish Academy of Sciences. Technical Sciences; 2019, 67, 1; 45-51
    0239-7528
    Pojawia się w:
    Bulletin of the Polish Academy of Sciences. Technical Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Application of global navigation satellite system and hydroacoustic techniques to safety of inland water navigation
    Zastosowanie globalnych nawigacyjnych systemów satelitarnych oraz współczesnych technik hydroakustycznych w bezpiecznej nawigacji śródlądowej
    Autorzy:
    Popielarczyk, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/224351.pdf
    Data publikacji:
    2011
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    nawigacja śródlądowa
    systemy satelitarne
    mapy batymetryczne
    bezpieczeństwo żeglugi śródlądowej
    baza śródlądowych przeszkód podwodnych
    Szlak Wielkich Jezior Mazurskich
    global navigation satellite system (GNSS)
    hydrography
    Interactive Inland Underwater Objects Dstabase (IIUOD)
    inland navigation
    Opis:
    The paper presents description of application of integrated, Global Navigation Satellite System (GNSS) and hydroacoustic technologies, for elaboration of actual bathymetric chart and creation of an Inland Interactive Underwater Objects Base (IIUOD). In the paper the description of some integrated bathymetric experiments conducted on Great Mazurian Lakes is presented. A small area of Lake Sniardwy, the largest lake in Poland, has been measured using modern technology with precise satellite positioning and hydrographic techniques. The idea and first results of the implemented base is analyzed and described. The database (IIUOD) is created for visualization of dangerous underwater objects and finally for safety of inland water navigation.
    Artykuł przedstawia zastosowanie zintegrowanych technik satelitarnego pozycjonowania GNSS i systemu hydroakustycznego do opracowania aktualnych map batymetrycznych oraz utworzenia Interaktywnej Bazy Śródlądowych Przeszkód Podwodnych w celu zapewnienia bezpieczeństwa żeglugi na Szlaku Wielkich Jezior Mazurskich. W artykule opisano eksperymentalne prace pomiarowe wykonane na jeziorze Śniardwy z zastosowaniem satelitarnego pozycjonowania DGPS/EGNOS oraz systemu hydrograficznego. Przedstawiono także koncepcję oraz wyniki utworzenia eksperymentalnej bazy geodanych o przeszkodach podwodnych. Opracowana baza IBŚPP umożliwia wizualizację kształtu dna oraz przeszkód. Pomaga poprawić bezpieczeństwo żeglugi śródlądowej i uprawiania sportów wodnych na Wielkich Jeziorach Mazurskich.
    Źródło:
    Archives of Transport; 2011, 23, 2; 191-190
    0866-9546
    2300-8830
    Pojawia się w:
    Archives of Transport
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Międzynarodowy system monetarny a globalny kryzys finansowy: wnioski dla polityki makroekonomicznej w krajach rozwijających się
    International monetary system and global financial crisis: lessons for macroeconomic policy in the developing countries
    Международная монетарная система и глобальный финансовый кризис. Выводы для макроэкономической политики в развивающихся странах
    Autorzy:
    Ciżkowicz, Piotr
    Rzońca, Andrzej
    Powiązania:
    https://bibliotekanauki.pl/articles/1012060.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    international monetary system
    global financial crisis
    interest rates
    precautionary regulations
    международная монетарная система
    глобальный финансовый кризис
    процентные ставки
    урегулирования
    сдерживающие финансовые риски
    Opis:
    The paper shows that the basic causes of the recent global financial crisis, e.i. low interest rates in major developed economies combined with surplus savings in the developing countries, may be linked with the deficiencies inherent in the international monetary system. The authors argue that these deficiencies have amplified as the result of the crisis. This conclusion serves to project the probable design of macroeconomic policies to be performed in the developed and developing countries. The authors point at high costs of the macroeconomic policy performed by the major developed countries in their reaction to the crisis, which are reflected mainly in the delayed restructuring of the economies. Then the authors discuss the threats that arise from this reaction for the development of the emerging economies. In their opinion, this situation may justify a deliberate policy of a slower revival. The more disciplined fi scal and monetary policy may be supported by some precautionary regulations.
    В статье предлагается тезис, что основные причины последнего глобального финансового кризиса, т.е. низкие процентные ставки в главных высокоразвитых странах и слишком высокие сбережения в развивающихся странах, можно связать с недостатками международной монетарной системы. Авторы утверждают, что эти недостатки усилились вследствие кризиса. Этот вывод помогает определить предполагаемое направление макроэкономической политики в главных высокоразвитых странах и в развивающихся странах. Авторы обращают внимание на издержки макроэкономической политики, проводимой главными высокоразвитыми странами в реакции на кризис, которые проявляются прежде всего в замедлении реструктуризации.Затем авторы указывают на угрозы, которые возникают в результате такой реакции для развивающихся стран. По мнению авторов, эти угрозы обосновывают такую макроэкономическую политику , которая растягивает период возвращения к высокой экономической активности. Поддержкой для дисциплинированной макроэкономической политики могут стать некоторые урегулирования, сдерживающие финансовые риски.
    Źródło:
    Ekonomista; 2013, 5; 625-645
    0013-3205
    2299-6184
    Pojawia się w:
    Ekonomista
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-13 z 13

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