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    Wyświetlanie 1-3 z 3
    Tytuł:
    Similarities and differences in the Earth’s water variations signal provided by GRACE and AMSR-E observations using maximum covariance analysis at various land cover data backgrounds
    Autorzy:
    Szabó, Viktor
    Osińska-Skotak, Katarzyna
    Powiązania:
    https://bibliotekanauki.pl/articles/27314481.pdf
    Data publikacji:
    2023
    Wydawca:
    Polska Akademia Nauk. Centrum Badań Kosmicznych PAN
    Tematy:
    GRACE
    AMSR-E
    total water storage anomalies
    soil moisture
    remote sensors
    Opis:
    The study presents a compatibility analysis of gravimetric observations with passive microwave observations. Monitoring the variability of soil water content is one of the essential issues in climate-related research. Total water storage changes (∆TWS) observed by Gravity Recovery and Climate Experiment (GRACE), enables the creation of many applications in hydrological monitoring. Soil moisture (SM) is a critical variable in hydrological studies. Advanced Microwave Scanning Radiometer (AMSR-E) satellite products provided unique observations on this variable in near-daily time resolutions. The study used maximum covariance analysis (MCA) to extract principal components for ∆TWS and SM signals. The analysis was carried out for the global area, dividing the discussion into individual continents. The amplitudes of gravimetric and microwave signals were computed via the complex empirical orthogonal function (EOF) and the complex conjugate EOF* to determine the regions for detailed comparison. Similarities and differences in signal convergence results were compared with land cover data describing soil conditions, vegetation cover, urbanization status, and cultivated land. Convergence was determined using Pearson correlation coefficients and cross-correlation. In order to compare ∆TWS and SM in individual seasons, ∆TWS observations were normalized. Results show that naturally forested areas and large open spaces used for agriculture support the compatibility between GRACE and AMSRE observations and are characterized by a good Pearson correlation coefficient >0.8. Subpolar regions with permafrost present constraints for AMSR-E observations and have little convergence with GRACE observations.
    Źródło:
    Artificial Satellites. Journal of Planetary Geodesy; 2023, 58, 2; 63--87
    2083-6104
    Pojawia się w:
    Artificial Satellites. Journal of Planetary Geodesy
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Koncepcja sensorów rozciągania i kondycjonowania w zmiennych temperaturach na bazie polimerów barwionych barwnikiem luminescencyjnym
    The conception of stretch and storage in variable temperature sensors based on polymers with luminescence dye
    Autorzy:
    Owczarek, G.
    Pościk, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/153600.pdf
    Data publikacji:
    2013
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Mechaników Polskich
    Tematy:
    sensory rozciągania
    sensory kondycjonowania
    polimery
    luminescencja
    stretch sensors
    storage sensors
    polymers
    luminescence
    Opis:
    Przedstawiono koncepcję sensorów rozciągania i kondycjonowania w zmiennych temperatury wykonanych z polimerów barwionych barwnikiem luminescencyjnym o strukturze stlibenu (4,4'-Bis(2-benzoxazolyl) stilben). Dla sensorów rozciągania wyznaczono eksperymentalnie warunki odnoszące się do parametrów wymiarowych, jakie muszą być spełnione, aby paski sensorów mogły stanowić element detekcyjny. Dla sensorów kondycjonowania określono zakres temperatur, przy którym możliwa jest wzrokowa identyfikacja zmian barwy sensora oświetlonego promieniowaniem nadfioletowym.
    The conception of stretch sensors made of polyethylene with luminescence dye with stliben structure (4,4-Bis(2-benzoxazolyl)stilben) is presented in the paper. The sensor models are made as stripes which are mounted to the so called basic material for which the stretch process or the temperature change process is monitored. As a result of external forces on the basic material (stretching) or temperature changes there are irreversible changes in the structure of an integrated with it sensor as a dyed polymer belt/stripe. It also causes change in the spectrum of visible radiation emitted as a result of lighting the dye polymer with ultraviolet radiation. Potential use of the designed stretch polymer sensors are elements of personal protective equipment for which, as a result of external factors, there are irreversible changes that cause reduction or total loss of the required protective properties. That element of equipment that protects against fall from height (stretch sensor) or protective clothes (temperature sensor) should be classified to this group. For stretch sensors the methods of mounting dyed polymer stripes to the basic material (which is stretched) were determined. As a result of the performed research there were determined the experimental conditions concerning the dimensional parameters which should be met to use dyed polymer stripes as one of the detect elements for stretch processes in a basic material. For storage sensors the range of temperature changes, recognizable during visual inspection, was determined.
    Źródło:
    Pomiary Automatyka Kontrola; 2013, R. 59, nr 9, 9; 931-934
    0032-4140
    Pojawia się w:
    Pomiary Automatyka Kontrola
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Evaluation of Le MaC Wireless Storage Management System by Modified Waterfall Model
    Autorzy:
    Ganiron Jr, Tomas U.
    Powiązania:
    https://bibliotekanauki.pl/articles/1030459.pdf
    Data publikacji:
    2020
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Database
    Le MaC
    hard drives
    information technology
    modified waterfall
    sensors
    storage management system
    wireless
    Opis:
    This paper presents the findings of Modified Waterfall Model for Le MaC Wireless Storage Management. The system store users files using offline connection to save all their activities inside the computer laboratories. As a result, the notion of user made it easy for end users v to save their files without a help of a flash drives. Information Technology thus plays a key role in the development of the autonomous learner extends to operators as well as to programmers, which are users of components such as software libraries. The standard provides a framework for organizations to define a quality model for a software product. In doing so, however, it leaves up to each organization the task of specifying precisely its own model. This may be done, for example, by specifying target values for quality metrics which evaluates the degree of presence of quality attributes.
    Źródło:
    World Scientific News; 2020, 144; 43-55
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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