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Wyświetlanie 1-6 z 6
Tytuł:
Trace metals, fluorine and radionuclides in antarctic krill Euphausia superba Dana
Autorzy:
Soszka, Grzegorz Jan
Barański, Andrzej
Suplińska, Maria Małgorzata
Grzybowska, Danuta
Pietruszewski, Andrzej
Powiązania:
https://bibliotekanauki.pl/articles/2058082.pdf
Data publikacji:
1981
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Antarctic
krill
contamination
Źródło:
Polish Polar Research; 1981, 2, 3-4; 109-117
0138-0338
2081-8262
Pojawia się w:
Polish Polar Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Evaluating transmitters for quantifying respiratory airflow in the breathing mechanism
Autorzy:
Barański, Robert
Nitkiewicz, Szymon
Zając, Andrzej
Kukwa, Andrzej
Stano, Łukasz
Szawarc, Sebastian
Powiązania:
https://bibliotekanauki.pl/articles/27313802.pdf
Data publikacji:
2024
Wydawca:
Polska Akademia Nauk. Polskie Towarzystwo Diagnostyki Technicznej PAN
Tematy:
signal analysis
flow sensors
breathing
measurements
Opis:
Techniques for measuring fluid flow have been known since the 19th century. The first solutions based on the use of pressure only allowed relatively slow changes to be observed. It was not until measurement techniques based on the use of electronic components and the phenomenon of thermo-transfer, combined with a method enabling fast signal recording (A/C converters), that it became possible to analyse the flow of a medium (e.g. air) in detail. Although flow sensors based on measuring changes in resistance have been known for many years, new solutions are still being developed. This paper presents the results of a study using three sensors. Their response to laminar airflow was investigated for different velocities (1.2 - 2.6 m/s). The flow forcing was implemented using an axial fan and the signals were measured simultaneously for all the sensors tested. The results showed which sensors had the smallest dispersion of results (PAN and WA sensors) and confirmed that for the investigated velocity variations (0.14 m/s pitch) the results are unambiguously interpretable.. It should be noted that sensor research is related to the need to develop a device to measure flow as accurately as possible, while at the same time ensuring the comfort of the test person during the measurements. Therefore, the search was for a sensor that is small in size and at the same time resistant to damage and operation in a harsh humid environment.
Źródło:
Diagnostyka; 2024, 25, 1; art. no. 2024105
1641-6414
2449-5220
Pojawia się w:
Diagnostyka
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Anatomical and functional assessment of patency of the upper respiratory tract in selected respiratory disorders - Part 2
Autorzy:
Zając, Andrzej
Kukwa, Andrzej
Barański, Robert
Nitkiewicz, Szymon
Zomkowska, Edyta
Rybak, Adam
Powiązania:
https://bibliotekanauki.pl/articles/2173877.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
optical diagnostic in otolaryngology
upper respiratory tract diagnostics
otolaryngology
spirometer
Fourier transform
wavelet transform
quantitative parameters of the respiratory cycle
Opis:
This article presents selected physical diagnostic methods used in otorhinolaryngology and results of their application. In addition to the applications of methods using the capabilities of selective sensors, selected methods of hybrid diagnostics were also presented - for assessment of parameters of respiratory processes, with polysomnography as an example of using both typical diagnostic methods dedicated to otolaryngology, as well as standard EEG and ECG methods. It has been shown that in some special cases of respiratory disorders, measurements of the air flow in the respiratory tract can be supplemented with pressure measurements in selected positions within the airways. The presented optical methods and diagnostic systems are very often used in the diagnosis of diseases not specific for otolaryngology occurring in the area of the head and neck. The presented material is the second part of the study discussing both standard and widely used diagnostic methods. All presented methods are dedicated to otolaryngology. This text is a continuation of the material published in No 4 of 2021 [1].
Źródło:
Metrology and Measurement Systems; 2022, 29, 3; 429--454
0860-8229
Pojawia się w:
Metrology and Measurement Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Upper Silesian Geophysical Observation System - a unit of the EPOS project
Autorzy:
Mutke, Grzegorz
Kotyrba, Andrzej
Lurka, Adam
Olszewska, Dorota
Dykowski, Przemysław
Borkowski, Andrzej
Araszkiewicz, Andrzej
Barański, Adam
Powiązania:
https://bibliotekanauki.pl/articles/1839002.pdf
Data publikacji:
2019
Wydawca:
Główny Instytut Górnictwa
Tematy:
coal basin
mining
geodynamics
geophysics
monitoring systems
zagłębie węglowe
górnictwo
geodynamika
geofizyka
systemy monitoringu
Opis:
The aim of the paper is to present the structure and research potential of the newly created measurement and information system for observing dynamic phenomena occurring in the Earth's crust in the Upper Silesian Coal Basin (USCB) in Poland as a result of mining activities. The structure of the system is similar to the one developed for monitoring the movements of the European tectonic plate under the European Plate Observation System (EPOS) programme. The measurement part of the system consists of stationary devices and sensors working in monitoring mode, installed in various locations of the USCB, both on the surface and underground, as well as data sets from periodically performed measurements using land, air and satellite techniques. The IT part of the system will create a local data centre with specialized and dedicated processing and modelling software in which all measurement data will be archived and processed to a form which enables the analysis of the short and long-term impact of mining operations on the environment. As one of the elements of the system will be observations of the short and long-term gravity and morphology changes, the collected data will enable research in the field of the geodynamics of mining areas to be conducted.
Źródło:
Journal of Sustainable Mining; 2019, 18, 4; 198-207
2300-1364
2300-3960
Pojawia się w:
Journal of Sustainable Mining
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Comparison Analysis of Muck Pile Fragmentation Obtained Through the Photogrammetry Method and Based on the Kuz-Ram Empirical Model
Analiza porównawcza fragmentacji urobku wyznaczonej na podstawie metody fotogrametryczną oraz modelu Kuz-Ram
Autorzy:
Biessikirski, Andrzej
Dworzak, Michał
Twardosz, Michał
Pyra, Józef
Barański, Krzysztof
Powiązania:
https://bibliotekanauki.pl/articles/318280.pdf
Data publikacji:
2019
Wydawca:
Polskie Towarzystwo Przeróbki Kopalin
Tematy:
roboty strzałowe
fragmentacja urobku
Split Desktop 2.0
Kuz-Ram
O-Pitblast
blasting works
muck pile fragmentation
Opis:
This paper presents an evaluation of muck pile fragmentation based on the Kuz-Ram empirical model. Furthermore, a comparison of the cumulative size distribution curves obtained from the photogrammetry analysis and based on the Kuz-Ram model was made. Size distribution was performed based on the Kuz-Ram model and further validated in the O-Pitblast software. It was established that the algorithm applied in O-Pitblast software was not modified. The difference between empirical results and in-situ analysis could be explained by, inter alia, the subjective assumption of the RMD index value.
W artykule przedstawiono teoretyczne podstawy wyznaczania przewidywanej fragmentacji urobku oparciu model Kuz-Ram. Dodatkowo, wykonano porównanie krzywych składu ziarnowego uzyskanych na podstawie metody fotogrametrycznej oraz modelu Kuz-Ram. Procentowy udział frakcji dla charakterystycznych wielkości ziarna wyznaczono na podstawie równania Kuz-Ram, zaś dodatkową weryfikację przeprowadzono programie O-Pitblast, przy użyciu modułu analitycznego bazującego na analizowanym modelu fragmentacji. Na podstawie przeprowadzonych badań stwierdzono brak wprowadzenia modyfikacji do algorytmu programu O-Pitblast. Uzyskane różnice procentowego udziału frakcji wyznaczonej na podstawie obliczeń teoretycznych, oraz badań in-situ, można tłumaczyć m.in. subiektywnym przyjęciem współczynnika RMD.
Źródło:
Inżynieria Mineralna; 2019, 21, 1; 259-266
1640-4920
Pojawia się w:
Inżynieria Mineralna
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Anatomical and functional assessment of patency of the upper respiratory tract in selected respiratory disorders - Part 1
Autorzy:
Kukwa, Andrzej
Zając, Andrzej
Barański, Robert
Nitkiewicz, Szymon
Kukwa, Wojciech
Zomkowska, Edyta
Rybak, Adam
Powiązania:
https://bibliotekanauki.pl/articles/2052154.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
optical diagnostic in otolaryngology
upper respiratory tract diagnostics
otolaryngology
spirometer
Fourier transform
wavelet transform
quantitative parameters of the respiratory cycle
Opis:
The rapidly developing measurement techniques and emerging new physical methods are frequently used in otolaryngological diagnostics. A wide range of applied diagnostic methods constituted the basis for the review study aimed at presenting selected modern diagnostic methods and achieved diagnostic results to a wider group of users. In this part, the methods based on measuring the respiratory parameters of patients were analysed. Respiration is the most important and necessary action to support life and its effective duration. It is an actual gas exchange in the respiratory system consisting of removing CO2 and supplying O2. Gas exchange occurs in the alveoli, and an efficient respiratory tract allows for effective ventilation. The disruption in the work of the respiratory system leads to measurable disturbances in blood saturation and, consequently, hypoxia. Frequent, even short-term, recurrent hypoxia in any part of the body leads to multiple complications. This process is largely related to its duration and the processes that accompany it. The causes of hypoxia resulting from impaired patency of the respiratory tract and/or the absence of neuronal respiratory drive can be divided into the following groups depending on the cause: peripheral, central and/or of mixed origin. Causes of the peripheral form of these disorders are largely due to the impaired patency of the upper and/or lower respiratory tract. Therefore, early diagnosis and location of these disorders can be considered reversible and not a cause of complications. Slow, gradually increasing obstruction of the upper respiratory tract (URT) is not noticeable and becomes a slow killer. Hypoxic individuals in a large percentage of cases have a shorter life expectancy and, above all, deal with the consequences of hypoxia much sooner.
Źródło:
Metrology and Measurement Systems; 2021, 28, 4; 813-836
0860-8229
Pojawia się w:
Metrology and Measurement Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-6 z 6

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