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Tytuł:
3D scanning of the painting for the purpose of performing a measurement of deformations of the wooden panel painting support
Autorzy:
Lewandowski, M.
Kubik, H.
Gębarski, K.
Powiązania:
https://bibliotekanauki.pl/articles/1396458.pdf
Data publikacji:
2016
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
3D scanning
point clouds
cross-sections
deviation color map
Opis:
The person ordering the research was Mr. Andrzej Cichy of the Faculty of Wood Technology at the Warsaw University of Life Sciences. The painting was made available from his private collection. The aim of the research conducted by SMARTTECH was to study the impact of changes in humidity on the deformation of a wooden panel painting support.
Źródło:
Advanced Technologies in Mechanics; 2016, 3, no. 2 (7); 26-33
2392-0327
Pojawia się w:
Advanced Technologies in Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
An assessment of the quality of near-real time GNSS observations as a potential data source for meteorology
Autorzy:
Dymarska, N.
Rohm, W.
Sierny, J.
Kapłon, J.
Kubik, T.
Kryza, M.
Jutarski, J.
Gierczak, J.
Kosierb, R.
Powiązania:
https://bibliotekanauki.pl/articles/108476.pdf
Data publikacji:
2017
Wydawca:
Instytut Meteorologii i Gospodarki Wodnej - Państwowy Instytut Badawczy
Tematy:
ZTD estimation
data validation
GNSS meteorology
Opis:
The Global Navigation Satellite System (GNSS) can be used to determine accurate and high-frequency atmospheric parameters, such as Zenith Total Delay (ZTD) or Precipitable Water Vapour (PW), in all-weather conditions. These parameters are often assimilated into Numerical Weather Prediction (NWP) models and used for nowcasting services and climate studies. The effective usage of the ZTDs obtained from a ground-based GNSS receiver’s network in a NWP could fill the gap of insufficient atmospheric water vapour state information. The supply of such information with a latency acceptable for NWP assimilation schemes requires special measures in the GNSS data processing, quality control and distribution. This study is a detailed description of the joint effort of three institutions – Wrocław University of Environmental and Life Sciences, Wrocław University, and the Institute of Meteorology and Water Management – to provide accurate and timely GNSS-based meteorological information. This paper presents accuracy analyses of near real-time GNSS ZTD validated against reference ZTD data: the International GNSS Service (IGS) from a precise GNSS solution, Weather Research and Forecasting (WRF) model, and radiosonde profiles. Data quality statistics were performed for five GNSS stations in Poland over a time span of almost a year (2015). The comparison of near real-time ZTD and IGS shows a mean ZTD station bias of less than 3 mm with a related standard deviation of less than 10 mm. The bias between near real-time ZTD and WRF ZTD is in the range of 5-11 mm and the overall standard deviation is slightly higher than 10 mm. Finally, the comparison of the investigated ZTD against radiosonde showed an average bias at a level of 10 mm, whereas the standard deviation does not exceed 14 mm. Considering the data quality, we assess that the NRT ZTD can be assimilated into NWP models.
Źródło:
Meteorology Hydrology and Water Management. Research and Operational Applications; 2017, 5, 1; 3-13
2299-3835
2353-5652
Pojawia się w:
Meteorology Hydrology and Water Management. Research and Operational Applications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of Fraxinus pollen seasons and forecast models based on meteorological factors
Autorzy:
Kubik-Komar, A.
Piotrowska-Weryszko, K.
Weryszko-Chmielewska, E.
Kaszewski, B.M.
Powiązania:
https://bibliotekanauki.pl/articles/2081720.pdf
Data publikacji:
2018
Wydawca:
Instytut Medycyny Wsi
Tematy:
allergy
regression analysis
aerobiology
airborne pollen
Fraxinus
Opis:
Introduction and objective. The timings of Fraxinus and Betula flowering and pollen release overlap, which may cause increased allergic reactions in sensitive people. The aim of the present study was to characterize Fraxinus pollen seasons in Lublin (central-eastern Poland) and to identify meteorological factors that most determine the occurrence of airborne pollen of this taxon, as well as obtain forecast models for the basic characteristics of the pollen season. Materials and method. The study was conducted in Lublin during the period 2001–2016, employing the volumetric method. The seasons were compared by PCA (Principal Component Analysis). To determine relationships between meteorological conditions and the pattern of pollen seasons, regression analysis was used. Data for the period 2001–2015 were used to create forecast models by applying regression analysis, while the 2016 data served to verify these models. Results. Season end date and seasonal peak date were characterized by the lowest variation. The biggest differences were found for peak value and total annual pollen sum. The average dates of occurrence of ash pollen grains in the air of Lublin were between 13 April 13 – 3 May 3, whereas, on average, the pollen peak date occurred on 23 April. The factor loading values for the PC1 variable indicate that it is most strongly correlated with peak value and total pollen sum, while the PC2 variable correlated with the pollen season start date and season duration (a negative correlation). Regression models were developed for the following pollen season characteristics: season start, end and duration, seasonal peak date, and total annual pollen sum. Conclusions. The fit of the forecast models was at the level of 62–94%. Analysis of the data showed that weather conditions mainly in February were important factors controlling the Fraxinus pollen season.
Źródło:
Annals of Agricultural and Environmental Medicine; 2018, 25, 2; 285-291
1232-1966
Pojawia się w:
Annals of Agricultural and Environmental Medicine
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Determination of permeability and tortuosity of permeable media by ultrasonic method. Studies for sintered bronze
Autorzy:
Kochański, J.
Kaczmarek, M.
Kubik, J.
Powiązania:
https://bibliotekanauki.pl/articles/281913.pdf
Data publikacji:
2001
Wydawca:
Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:
saturated porous materials
ultrasonic waves
attenuation
Opis:
The paper presents a combined graphical and analytical method of determination of two structural parameters of a permeable medium: permeability and tortuosity. The method is based on two-phase model of permeable material and uses experimental data from ultrasonic studies of wave parameters in alcohol-saturated sintered bronze.
Wyznaczanie przepuszczalności i krętości ośrodka przepuszczalnego przy wykorzystaniu wolnej fali ultradźwiękowej. Badania dla porowatego spiekanego brązu. W pracy przedstawiono analityczno-graficzną metodę wyznaczania dwóch parametrów struktury ośrodka przepuszczalnego: przepuszczalności i krętości. Proponowana metoda bazuje na dwufazowym modelu ośrodka przepuszczalnego i na wynikach pomiaru parametrów propagacji fali ultradźwiękowej - wolnej w nasyconym ośrodku porowatym. Pomiary wykonano dla porowatego brązu nasyconego alkoholem.
Źródło:
Journal of Theoretical and Applied Mechanics; 2001, 39, 4; 923-928
1429-2955
Pojawia się w:
Journal of Theoretical and Applied Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Dynamic behavior of bone-implant substitute systems. Numerical and experimental study
Dynamika układów zastępczych połączenia kość-implant. Badania numeryczne i eksperymentalne
Autorzy:
Nowak, B.
Kaczmarek, M.
Kubik, J.
Powiązania:
https://bibliotekanauki.pl/articles/279424.pdf
Data publikacji:
2009
Wydawca:
Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:
dynamics
biomechanics
bone
implant
Opis:
In this paper, a study of substitute systems of an implanted bone was presented from the point of view of elaboration of a method for dia- gnosing the state of integrity of the bone-implant attachment based on vibrational techniques. Dynamic parameters of the systems were esha- blished as sets of eigenfrequencies/resonance frequencies using numerical procedures and experimental modal analysis. The shifts of values of the parameters were discussed in relation to the loosening of contact between the bone and implant. The numerical and experimental results were compared and their consequences for application of vibrational techniques to real anatomical systems discussed.
W pracy przedstawiono badania układów zastępczych zaimplantowanej kości udowej, które dotyczą rozwijania nowych metod diagnostycznych opartych na technikach drganiowych. Wyznaczono zbiory parametrów dynamicznych układów w postaci częstotliwości własnych i rezonansowych dla badań numerycznych i eksperymentalnych. Zmiany parametrów dynamicznych przedyskutowane zostały w kontekście odspajania implantu od kości. Porównano także wyniki badań numerycznych i eksperymentalnych oraz przeanalizowano możliwości zastosowania tej metody w układach anatomicznych.
Źródło:
Journal of Theoretical and Applied Mechanics; 2009, 47, 3; 617-628
1429-2955
Pojawia się w:
Journal of Theoretical and Applied Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
From Monoatomic Multilayers To Ordered Alloys
Autorzy:
Korecki, J.
Kubik, M.
Spiridis, N.
Ślęzak, T.
Powiązania:
https://bibliotekanauki.pl/articles/2011233.pdf
Data publikacji:
2000-01
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.70.Cn
75.50.Bb
76.80.+y
Opis:
Recent progress in UHV preparation and characterization methods resulted in a large variety of novel materials. Among them, magnetic multilayers have become one of the mostly investigated system due to interesting phenomena like oscillating indirect exchange coupling, spin dependent electron transport, or large perpendicular anisotropies. An attractive possibility given by the molecular beam epitaxy is to grow the multilayer structures on atomic scale by the so-called atomic layer deposition. At the low thickness limit, a multilayer structure, in which few atomic layers of different metals are stacked alternately, is expected to be an artificial ordered alloy. Such artificial material, which does not exist in the equilibrium bulk phase, was constructed for the first time as the AuFe ordered alloy of the L1$\text{}_{0}$ structure. Our conversion electron Mössbauer spectroscopy studies of this system verified the existence of the tetragonal phase, which is responsible for the perpendicular anisotropy. The ordering process is influenced by the complicated growth of Fe on Au, as shown by the atomic scale scanning tunneling microscopy investigations. Other systems to be presented are FeAl (strong ordering mechanism in the bulk) and FeCr (miscible in the wide concentration range) monoatomic
Źródło:
Acta Physica Polonica A; 2000, 97, 1; 129-139
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
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