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Wyświetlanie 1-15 z 17
Tytuł:
Temperature Studies of Optical Birefringence in Molecular Liquids. I. Liquids with Linear Temperature Dependence
Autorzy:
Błaszczak, Z.
Doiari, A.
Powiązania:
https://bibliotekanauki.pl/articles/1920618.pdf
Data publikacji:
1992-04
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
35.20.My
42.60.He
78.20.Dj
Opis:
We report the first systematic study of the temperature dependence of optically induced birefringence in benzene, toluene, nitrobenzene, chlorobenzene, 2-bromoanisole, 2-methylbenzaldehyde, 3-methylbenzaldehyde, 3-chlorobenzaldehyde and cinnamaldehyde. The optical Kerr constants, relative to benzene, are measured in a broad temperature range. Refractive indices and densities of the liquids for the temperatures studied were also determined. For the above liquids the T$\text{}^{-1}$ temperature dependences of the optical Kerr constants have been found. From our measurements, the molar Kerr constants and the effective molecular anisotropies were calculated as functions of temperature. The mean values of the second-order optical hyperpolarizability have also been determined.
Źródło:
Acta Physica Polonica A; 1992, 81, 4-5; 475-484
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Proposed Technology of lidar data processing to build DTM
Autorzy:
Błaszczak-Bąk, W.
Janowski, A.
Powiązania:
https://bibliotekanauki.pl/articles/225720.pdf
Data publikacji:
2009
Wydawca:
Politechnika Warszawska. Wydział Geodezji i Kartografii
Tematy:
DTM
LIDAR
kartografia
lidar
cartography
Opis:
Light Detection and Ranging (LiDAR) is a sensing technology whieh has application in building the Digital Terrain Model (DTM). A point cloud generated from laser scanning makes up the so-called large dataset, which is difficult and sometimes even impossible to use directly. Import of LiDAR point cloud into appropriate software and its processing is time-consuming and demands high computing power. Therefore, it is advisable to optimize the volume of observation results which make up the point cloud. The following paper presents operation of a modified algorithm for optimization of points' number in a large dataset [Błaszczak W., 2006]. The optimization involves reduction and uses existing cartographic generalization methods. The optimized dataset was filtered, and during the process the points representing the terrain were separated from data representing non-ground elements. Filtration was carried out with the application of a proposed new method including trend line in search belts, and the laser power used to register points. The optimized and filtered data set was then used to build a DTM. The results obtained encourage further detailed study of theoretical and empirical character.
Źródło:
Reports on Geodesy; 2009, z. 2/87; 29-38
0867-3179
Pojawia się w:
Reports on Geodesy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Entamoeba gingivalis - prevalence and correlation with dental caries in children from rural and urban regions of Lublin province, Eastern Poland
Autorzy:
Mielnik-Błaszczak, M.
Rzymowska, J.
Michałowski, A.
Skawińska-Bednarczyk, A.
Błaszczak, J.
Powiązania:
https://bibliotekanauki.pl/articles/2081940.pdf
Data publikacji:
2018
Wydawca:
Instytut Medycyny Wsi
Tematy:
children
dental caries
Entamoeba gingivalis
Opis:
Introduction. Entamoeba gingivalis, as the name implies. typically lives around the gumline of the teeth in the tartar and gingival pockets of the oral cavity. Pathogenicity of protozoa in the oral cavity is not completely understood. The occurrence in patients with a good state of the immune system usually does not cause any pathological changes. In the presentede survey, an increased incidence of Entamoeba gingivalis in conjunction with pathological changes in the oral cavity was found. Objectives. The aim of the study was to evaluate the prevalence of Entamoeba gingivalis in children treated in Department of Paediatric Dentistry of the Medical University in Lublin and its correlation with dental caries. Materials and method. Diagnostic materials in the form of swabs were obtained from 154 children in the age 2–18 years old, treated in the Department of Paediatric Dentistry of the Medical University in Lublin. The main index for epidemiological surveys in oral health – DMFT (decayed, missed, and filled teeth) for permanent teeth and DMFT for deciduous teeth was calculated. Results. The average number of Entamoeba gingivalis in urban children was 12.84. The DMFT number in the deciduous teeth was lower in urban patients (5.0) than from rural patients (5.4). The DMFT number in the permanent teeth was lower in urban patients (3.155) than rural patients (3.98). There was no statistically significant correlation between the DMFT value and the number of Entamoeba gingivalis. Conclusions. 1) Entamoeba gingivalis occurs in the oral cavity of children. 2) In the presented survey, both DMFT and dmft indexes were high which proves high activity of dental carious. 3) There was no significant statistical correlation observed between dental caries and the presence of Entamoeba gingivalis.
Źródło:
Annals of Agricultural and Environmental Medicine; 2018, 25, 4; 656-658
1232-1966
Pojawia się w:
Annals of Agricultural and Environmental Medicine
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Point cloud unification with optimization algorithm
Autorzy:
Błaszczak-Bąk, W.
Sobieraj, A.
Powiązania:
https://bibliotekanauki.pl/articles/298162.pdf
Data publikacji:
2015
Wydawca:
Uniwersytet Warmińsko-Mazurski w Olsztynie
Tematy:
laser scanning
unification
optimization
Opis:
Terrestrial laser scanning is a technology that enables to obtain three-dimensional data - an accurate representation of reality. During scanning not only desired objects are measured, but also a lot of additional elements. Therefore, unnecessary data is being removed, what has an impact on efficiency of point cloud processing. It can happen while single point clouds are displayed - user decides what he wants to deleted and does it manually, or by using tools provided in dedicated for point cloud processing softwares. In Leica Geosystems Cyclone - software used here in tests, user can apply tools e.g. for merging or unification of point clouds. Both of them change the separate points clouds into one points cloud, however unification can be executed with reduction - low, medium, high, highest or no reduction at all. It should be noted, that the modeled objects may have complex structure and unification with selected type of reduction can have a very big impact on the result of modeling. In such situation it is desirable to apply different types of reduction. In this article authors propose to apply an optimization algorithm on unified point clouds. Unification conducted by means of Cyclone Leica Geosystems (v.7.3.3) enables to merge point clouds and reduced the number of points. The point elimination is determined mainly by spacing between points. It may leads to loose of important points - representing some essential elements of scanned objects or area. Applying optimization algorithm, especially for complex objects, may help to reduce the number of points without losing the information necessary for proper modeling.
Źródło:
Technical Sciences / University of Warmia and Mazury in Olsztyn; 2015, 18(4); 271-282
1505-4675
2083-4527
Pojawia się w:
Technical Sciences / University of Warmia and Mazury in Olsztyn
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Impact of optimization of ALS point cloud on classification
Autorzy:
Błaszczak-Bąk, W.
Sobieraj, A.
Powiązania:
https://bibliotekanauki.pl/articles/298363.pdf
Data publikacji:
2013
Wydawca:
Uniwersytet Warmińsko-Mazurski w Olsztynie
Tematy:
optimization
classification
intensity
Opis:
Airborne laser scanning (ALS) is one of the LIDAR technologies (Light Detection and Ranging). It provides information about the terrain in form of a point cloud. During measurement is acquired: spatial data (object’s coordinates X, Y, Z) and collateral data such as intensity of reflected signal. The obtained point cloud is typically applied for generating a digital terrain model (DTM) and a digital surface model (DSM). For DTM and DSM generation it is necessary to apply filtration or classification algorithms. They allow to divide a point cloud into object groups (e.g.: terrain points, vegetation, etc.). In this study classification is conducted with one extra parameter–intensity. The obtained point groups were used for digital spatial model generation. Classification is a time and work consuming process, therefore there is a need to reduce the time of ALS point cloud processing. Optimization algorithm enables to decrease the number of points in a dataset. In this study the main goal was to test the impact of optimization on the results of a classification. Studies were conducted in two variants. Variant 1 includes classification of the original point cloud where points are divided in the groups: roofs, asphalt road, tree/bushes, grass. On variant 2 before classification, an optimization algorithm was performed in the original point cloud. Obtained from these two variants object groups were used to generate a spatial model, which was then statistically analyzed.
Źródło:
Technical Sciences / University of Warmia and Mazury in Olsztyn; 2013, 16(2); 147-164
1505-4675
2083-4527
Pojawia się w:
Technical Sciences / University of Warmia and Mazury in Olsztyn
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ground-State Energy of Biquadratic Spin Systems (S=3/2) in the (1/z)$\text{}^{1}$-Approximation
Autorzy:
Błaszczak, E.
Aksamit, J.
Franek, A.
Powiązania:
https://bibliotekanauki.pl/articles/2035740.pdf
Data publikacji:
2003-04
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.10.Jm
75.30.Ds
75.30.Et
75.50.Ee
Opis:
Corrections to the molecular-field ground-state energies of the Heisenberg model with isotropic biquadratic interactions (spin S=3/2) are calculated in the (1/z)$\text{}^{1}$-approximation using the diagrammatic technique based on the Wick reduction theorem (z is the number of spins interacting with any given spin). The present results for the antiferri- and antiferromagnetic phases complete the previously obtained data for the antiquadrupolar, ferri- and ferromagnetic phases. From among the boundaries between different ground states only that between the antiferri- and antiferromagnetic phases is shifted with respect to its molecular-field value.
Źródło:
Acta Physica Polonica A; 2003, 103, 4; 403-414
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Selected metrology problems implied by the application of LED technology in lighting
Wybrane problemy metrologiczne implikowane stosowaniem technologii LED w oświetleniu
Autorzy:
Błaszczak, U. J.
Zając, A. S.
Powiązania:
https://bibliotekanauki.pl/articles/408716.pdf
Data publikacji:
2016
Wydawca:
Politechnika Lubelska. Wydawnictwo Politechniki Lubelskiej
Tematy:
light emitting diodes
measurement
lighting technology
diody elektroluminescencyjne
pomiary
technika świetlna
Opis:
High power LEDs replace traditional light sources in all possible lighting applications, causing significant problems in assessing the quality of lighting. This issue is not limited only to the construction aspects of the measuring equipment, but also has a cognitive dimension. The article presents an overview of the current state of knowledge on color rendering and evaluation of discomfort glare in relation to the widespread use of LEDs in lighting. Some selected parameters developed copyright sources with LED sets. Basic limitations in UGR measurement were indicated
Diody świecące dużej mocy zastępują klasyczne źródła światła właściwie we wszystkich możliwych aplikacjach oświetleniowych, co powoduje znaczne problemy w ocenie jakości oświetlenia. Zagadnienie to nie sprowadza się wyłącznie do aspektów konstrukcyjnych aparatury pomiarowej, lecz także ma wymiar poznawczy. W artykule przedstawiono przegląd aktualnego stanu wiedzy na temat oddawania barw oraz oceny olśnienia przykrego w odniesieniu do powszechnego stosowania diod LED w oświetleniu. Omówiono wybrane parametry opracowywanych autorskich źródeł z zestawami LED. Wskazano podstawowe ograniczenia w technice pomiarów UGR.
Źródło:
Informatyka, Automatyka, Pomiary w Gospodarce i Ochronie Środowiska; 2016, 3; 6-11
2083-0157
2391-6761
Pojawia się w:
Informatyka, Automatyka, Pomiary w Gospodarce i Ochronie Środowiska
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The aesthetic charakter of industrial design furniture in the eclectism period
Estetyka mebli eklektycznych w czasie rewolucji przemysłowej
Autorzy:
Blaszczak, I.
Lisiecka, E.
Mielnik, A.
Powiązania:
https://bibliotekanauki.pl/articles/7274.pdf
Data publikacji:
2015
Wydawca:
Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
Źródło:
Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology; 2015, 92
1898-5912
Pojawia się w:
Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Applying RANSAC algorithm for fitting scanning strips from airborne laser scanning
Wykorzystanie algorytmu RANSAC przy wpasowaniu szeregów ALS
Autorzy:
Błaszczak-Bąk, W.
Janicka, J.
Sobieraj-Żłobińska, A.
Powiązania:
https://bibliotekanauki.pl/articles/396557.pdf
Data publikacji:
2016
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
airborne laser scanning
RANSAC algorithm
fitting
lotniczy skaning laserowy
algorytm RANSAC
wpasowanie
Opis:
During the development of the data acquired by airborne laser scanning the important issue is the fitting and georeferencing of ALS point clouds by means of the tie surfaces and the reference planes. The process of scanning strips adjustment is based on mutual integration of point clouds (scanning strips) and their adaptation to the reference planes. In simultaneous adjustment all strips are combined into one geometrically coherent block, to which the coordinates are given. In the process of determining discrepancies between scanning strips it is important to determine the correct size of the shifts (offsets). Authors propose to do this by using RANSAC algorithm.
Podczas opracowywania danych pozyskanych w wyniku lotniczego skaningu laserowego istotną kwestią jest wpasowanie i nadanie georeferencji szeregom ALS w oparciu o powierzchnie wiążące oraz płaszczyzny referencyjne. Proces wyrównania szeregów polega na wzajemnym wpasowaniu szeregów oraz ich dopasowaniu do płaszczyzn referencyjnych. W jednoczesnym procesie wyrównawczym wiąże się wszystkie szeregi w jeden spójny geometrycznie blok, któremu nadaje się współrzędne terenowe. W procesie wyznaczania rozbieżności szeregów istotne jest określenie prawidłowej wielkości przesunięć (offsetów). Autorzy proponują w tym celu wykorzystanie algorytmu RANSAC.
Źródło:
Civil and Environmental Engineering Reports; 2016, No. 23(4); 29-41
2080-5187
2450-8594
Pojawia się w:
Civil and Environmental Engineering Reports
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Passive smoking as an environmental health risk factor
Autorzy:
Sikorska-Jaroszynska, M.H.J.
Mielnik-Blaszczak, M.
Krawczyk, D.
Nasilowska-Barud, A.
Blaszczak, J.
Powiązania:
https://bibliotekanauki.pl/articles/51680.pdf
Data publikacji:
2012
Wydawca:
Instytut Medycyny Wsi
Opis:
Initially, tobacco was considered as a decorative plant and only later began to be treated as a herb with special therapeutic properties. With time, it was found that tobacco had strong insecticidal and addictive properties. There also occurred reports about the negative influence of tobacco on human health. The World Health Organization (WHO) classifies smoking as a chronic, progressive disease which is also ‘contagious’. It is also considered to be a neurobiotic addiction. Nicotine addiction does not cause changes in the behaviour or functioning of a smoker; however, it adversely affects his or her general health status and the health status of people within their environment. Passive smoking (so-called ETS – Environmental Tobacco Smoke), which means accompanying smokers negatively influences the health of passive smokers. Environmental tobacco smoke, on the one hand, is the result of spontaneous cigarette burning and, on the other hand, the result of the side-stream of cigarette smoke, as well as the smoke exhaled by active smokers. Health personnel should clearly and convincingly present the data concerning the adverse results of smoking, as well as the dangers of exposure to environmental tobacco smoke, thereby making their patients aware that breaking their addiction will not only be beneficial for their own health, but will also protect non-smokers in their environment from the adverse effects of exposure to environmental tobacco smoke.
Źródło:
Annals of Agricultural and Environmental Medicine; 2012, 19, 3
1232-1966
Pojawia się w:
Annals of Agricultural and Environmental Medicine
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The pattern of seed banks during secondary succession on poor soils
Autorzy:
Kwiatkowska-Falinska, A.
Jankowska-Blaszczak, M.
Wodkiewicz, M.
Powiązania:
https://bibliotekanauki.pl/articles/58044.pdf
Data publikacji:
2011
Wydawca:
Polskie Towarzystwo Botaniczne
Tematy:
seed bank
secondary succession
poor soil
fallow
Calluna vulgaris
fresh coniferous forest
initial stage
psammophilous species
persistence
Opis:
Studies on the soil seed banks of fallow lands of different ages were carried out on poor soil abandoned fields and in a fresh coniferous forest in north-eastern Poland. The size and diversity of seed banks was studied with the seedling emergence method. Species abundance (i), density (ii), number of species from different biological groups (iii) and distribution and mean LI value (iv) were analysed as the function of fallow land age. It was found that: (i) species diversity, number of species and ln of density are linear declining function of the fallow land age; (ii) for approx. 25 years the share of diaspores of identified species groups has been relatively similar. Seed banks of 40-50-year-old fallow lands are dominated by Calluna vulgaris, while the seed bank of the old fresh coniferous forest is dominated by dicotyledonous perennials and grasses; (iii) within the first 50 years of succession the persistence of seed banks measured by the Longevity Index increases gradually.
Źródło:
Acta Societatis Botanicorum Poloniae; 2011, 80, 4
0001-6977
2083-9480
Pojawia się w:
Acta Societatis Botanicorum Poloniae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Structural changes of corn starch during fuel ethanol production from corn flour
Autorzy:
Szymanowska-Powalowska, D.
Lewandowicz, G.
Blaszczak, W.
Szwengiel, A.
Powiązania:
https://bibliotekanauki.pl/articles/80589.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
structural change
corn starch
native starch
ethanol production
simultaneous saccharification
simultaneous fermentation
enzymatic hydrolysis
energy consumption
gelatinization
Źródło:
BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology; 2012, 93, 3
0860-7796
Pojawia się w:
BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Hiatal hernia as a rare cause of cardiac complications – case based review of the literature
Autorzy:
Krawiec, K.
Szczasny, M.
Kadej, A.
Piasecka, M.
Blaszczak, P.
Głowniak, A.
Powiązania:
https://bibliotekanauki.pl/articles/28762875.pdf
Data publikacji:
2021
Wydawca:
Instytut Medycyny Wsi
Źródło:
Annals of Agricultural and Environmental Medicine; 2021, 28, 1
1232-1966
Pojawia się w:
Annals of Agricultural and Environmental Medicine
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Preliminary results of lidar based studies of the aerosol vertical distribution in the lower troposphere over urban coastal areas
Autorzy:
Halas, M.
Blaszczak, Z.
Grabowski, J.
Papayannis, A.
Zielinski, T.
Powiązania:
https://bibliotekanauki.pl/articles/48171.pdf
Data publikacji:
2004
Wydawca:
Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:
vertical profile
aerosol
urban area
lidar
troposphere
coastal area
Opis:
The paper reports the results of lidar measurements performed in the lower troposphere during several measurement sessions in Athens (Greece) in 2000. For the sake of comparison, results of a similar study performed in Kołobrzeg (Poland) in 2001 are also given. These data indicate that the exhaust gases produced by motor transportation in the cities resulted in the formation of an inversion layer. The rate of convection of the inversion layer depends on the intensity of sunlight, the strength of winds and the morphology of the land. The inversion layer reaches the highest altitudes in the middle of summer, lower in early and late summer and the lowest in autumn. Over the sea the inversion layer altitude extends to several meters, but on moving inland it rises to a fewh undred meters.
Źródło:
Oceanologia; 2004, 46, 3
0078-3234
Pojawia się w:
Oceanologia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Smoking and the level of nicotine addiction in relation to the state of hard dental tissues in young adults
Autorzy:
Sikorska-Jaroszynska, M.H.J.
Mielnik-Blaszczak, M.
Krawczyk, D.
Nasilowska-Barud, A.
Powiązania:
https://bibliotekanauki.pl/articles/50206.pdf
Data publikacji:
2011
Wydawca:
Instytut Medycyny Wsi
Tematy:
cigarette smoking
nicotine addiction
nicotine level
hard dental tissue
young adult
adult
human behaviour
Źródło:
Annals of Agricultural and Environmental Medicine; 2011, 18, 2
1232-1966
Pojawia się w:
Annals of Agricultural and Environmental Medicine
Dostawca treści:
Biblioteka Nauki
Artykuł
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