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Wyświetlanie 1-15 z 78
Tytuł:
Depositional conditions on an alluvial fan at the turn of the Weichselian to the Holocene – a case study in the Żmigród Basin, southwest Poland
Autorzy:
Zieliński, P.
Sokołowski, R. J.
Fedorowicz, S.
Woronko, B.
Hołub, B.
Jankowski, M.
Kuc, M.
Tracz, M.
Powiązania:
https://bibliotekanauki.pl/articles/94513.pdf
Data publikacji:
2016
Wydawca:
Uniwersytet im. Adama Mickiewicza w Poznaniu
Tematy:
climate change
periglacial environment
fluvial processes
aeolian processes
luminescence dating
zmiana klimatu
środowisko peryglacjalne
procesy fluwialne
procesy eoliczne
datowanie luminescencyjne
Opis:
Presented are the results of research into the fluvio-aeolian sedimentary succession at the site of Postolin in the Żmigród Basin, southwest Poland. Based on lithofacies analysis, textural analysis, Thermoluminescence and Infrared-Optical Stimulated Luminescence dating and GIS analysis, three lithofacies units were recognised and their stratigraphic succession identified: 1) the lower unit was deposited during the Pleni-Weichselian within a sand-bed braided river functioning under permafrost conditions within the central part of the alluvial fan; 2) the middle unit is the result of aeolian deposition and fluvial redeposition on the surface of the fan during long-term permafrost and progressive decrease of humidity of the climate at the turn of the Pleni to the Late Weichselian; 3) the upper unit accumulated following the development of longitudinal dunes at the turn of the Late Weichselian to the Holocene; the development of dunes was interrupted twice by the form being stabilised by vegetation and soil development.
Źródło:
Geologos; 2016, 22, 2; 105-120
1426-8981
2080-6574
Pojawia się w:
Geologos
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Stratigraphic position of tills in the Orłowo Cliff section (northern Poland): a new approach
Autorzy:
Woźniak, Piotr Paweł
Sokołowski, Robert J.
Czubla, Piotr
Fedorowicz, Stanisław
Powiązania:
https://bibliotekanauki.pl/articles/2025278.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
lithofacies analysis
petrographic composition
till fabric
TL dating
Middle and Late Pleistocene
Nauki o Ziemi
Opis:
The site at Orłowo Cliff was used to analyse the stratigraphic position and palaeogeographic interpretations of the properties and depositional conditions of two basal tills from the Late Pleistocene. A multi-proxy approach involved lithofacies, petrographic analysis of the fine gravel fraction, analyses of indicator erratics and till fabric. TL dating of intra-moraine deposits was used to determine depositional time frames of tills. The sediment profile at Orłowo Cliff shows a distinct reduction in number of Pleistocene units. Obtained dating results suggest the presence of Middle and Late Pleistocene fluvial units. The main issue discussed is the stratigraphic position of the older till (Unit O-4). It can be assumed that this till was deposited probably during the Middle Weichselian (MIS4). At Orłowo Horn the till of Unit O-4 reveals incorporation of the erratic material derived from an older till in the surrounded area (according to petrographic composition – probably from MIS 8). The younger till (Unit O-6) was deposited in the Late Weichselian (MIS 2). Moreover, the till of Unit O-6 is characterised by a significant shift towards the south-west in terms of the erratic origin in Unit O-4.
Źródło:
Studia Quaternaria; 2018, 35; 25-40
1641-5558
2300-0384
Pojawia się w:
Studia Quaternaria
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Climate evolution during the Pleniglacial and Late Glacial as recorded in quartz grain morphoscopy of fluvial to aeolian successions of the European Sand Belt
Autorzy:
Woronko, B.
Zieliński, P.
Sokołowski, R. J.
Powiązania:
https://bibliotekanauki.pl/articles/94408.pdf
Data publikacji:
2015
Wydawca:
Uniwersytet im. Adama Mickiewicza w Poznaniu
Tematy:
fluvial to aeolian succession
aeolization of quartz sand grains
periglacial conditions
extraglacial zone
eolizacja ziaren piasku
piasek kwarcowy
warunki peryglacjalne
Opis:
We present results of research into fluvial to aeolian successions at four sites in the foreland of the Last Glacial Maximum, i.e., the central part of the “European Sand Belt”. These sites include dune fields on higher-lying river terraces and alluvial fans. Sediments were subjected to detailed lithofacies analyses and sampling for morphoscopic assessment of quartz grains. Based on these results, three units were identified in the sedimentary succession: fluvial, fluvio-aeolian and aeolian. Material with traces of aeolian origin predominate in these sediments and this enabled conclusions on the activity of aeolian processes during the Pleniglacial and Late Glacial, and the source of sediment supply to be drawn. Aeolian processes played a major role in the deposition of the lower portions of the fluvial and fluvio-aeolian units. Aeolian material in the fluvial unit stems from aeolian accumulation of fluvial sediments within the valley as well as particles transported by wind from beyond the valley. The fluvio-aeolian unit is composed mainly of fluvial sediments that were subject to multiple redeposition, and long-term, intensive processing in an aeolian environment. In spite of the asynchronous onset of deposition of the fluvio-aeolian unit, it is characterised by the greatest homogeneity of structural and textural characteristics. Although the aeolian unit was laid down simultaneously, it is typified by the widest range of variation in quartz morphoscopic traits. It reflects local factors, mainly the origin of the source material, rather than climate. The duration of dune-formation processes was too short to be reflected in the morphoscopy of quartz grains.
Źródło:
Geologos; 2015, 21, 2; 89-103
1426-8981
2080-6574
Pojawia się w:
Geologos
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Comparison of 3D printing MJP and FDM technology in dentistry
Autorzy:
Taczała, J.
Czepułkowska, W.
Konieczny, B.
Sokołowski, J.
Kozakiewicz, M.
Szymor, P.
Powiązania:
https://bibliotekanauki.pl/articles/1818497.pdf
Data publikacji:
2020
Wydawca:
Stowarzyszenie Komputerowej Nauki o Materiałach i Inżynierii Powierzchni w Gliwicach
Tematy:
CAD/CAM
dental materials
FDM
MJP
3D printing
materiały dentystyczne
drukowanie 3D
Opis:
Purpose: Many printers are tempting at low prices, but later their accuracy turns out to be insufficient. The study has included checking the accuracy of printing and reproducing details of 3D printers used in dental technology and dentistry such as MultiJet Printing (ProJet MP3000, 3D Systems) and Fused Deposition Modelling (Inspire S2000, Tiertime). Design/methodology/approach: The 3D prints were created from scans of the maxillary gypsum model with the loss of left premolar. In the test, objects were set to the X and Y-axis. In order to check the dimensional differences after printing, scans of the printed models were superimposed on scans of the plaster model in the GOM Inspect V8 SR1 (Braunschweig, Germany). The focus was on the distance of scans from each other and a deviation map was created for each object. Findings: The average absolute value of deviations for each of models were equalled: FDM- for X-axis 0.06 ± 0.04 mm, for Y-axis 0.07 ± 0.04 mm; MJP- for X-axis- 0.04 ± 0.02 mm, for Y-axis- 0.06 ± 0.02 mm. A chart of arithmetic averages calculated for each tooth for the best printouts in each series show that higher deviation values exist in case of FDM printout. The models printed in the X-axis have smaller values of deviations from those printed in the Y-axis. Practical implications: MultiJet Printing technology can be used to create more precise models than the FDM, but these printouts meet the requirements of dimensional accuracy too. Originality/value: CAD / CAM technology in the future will exist in every dental technology laboratory so it is important to be aware of the way the 3D printers works. By paying attention to the quality of detail reproduction, a Dental Technician is able to choose the best 3D printer for them.
Źródło:
Archives of Materials Science and Engineering; 2020, 101, 1; 32--40
1897-2764
Pojawia się w:
Archives of Materials Science and Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Przegląd rozwiązań zgrabiarek podbieraczowo-taśmowych o dużych szerokościach roboczych
Overview of solutions of belt pick-up swathers with large working widths
Autorzy:
Stolarski, A.
Panasiuk, A.
Sokolowski, R.
Szczepaniak, J.
Szulc, T.
Powiązania:
https://bibliotekanauki.pl/articles/883799.pdf
Data publikacji:
2017
Wydawca:
Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Maszyn Rolniczych
Tematy:
maszyny rolnicze
zgrabiarki podbieraczowo-przenosnikowe
szerokosc robocza
rozwiazania konstrukcyjne
pasze objetosciowe
jakosc paszy
Źródło:
Technika Rolnicza Ogrodnicza Leśna; 2017, 3
1732-1719
2719-4221
Pojawia się w:
Technika Rolnicza Ogrodnicza Leśna
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Eemian–Weichselian Pleniglacial fluvial deposits in S Poland (an example of the Vistula River valley in Kraków)
Autorzy:
Sokołowski, T.
Wacnik, A.
Woronko, B.
Madeja, J.
Powiązania:
https://bibliotekanauki.pl/articles/2059974.pdf
Data publikacji:
2014
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
Eemian-Weichselian
river deposits
climate change
environmental change
Opis:
A fragment of the middle terrace in the VistulaRivervalley, nearby the railway station in Kraków, is formed by fluvial channel and overbank deposits of the PrądnikRiver, which bear a record of various environments affected by changing climatic conditions. The sedimentary succession includes two complexes that differ in lithofacies. The older complex comprises fining-upward deposits (channel sand and gravelly sand with medium- and large-scale trough cross-stratification) and, less frequently, sand with planar cross-stratification overlain by silt with intercalations of biogenic deposits of abandoned channels. Vegetation accompanying the deposition of biogenic layers was typical of boreal coniferous forests, dominated by Pinus sylvestris with a small admixture of Larix, Pinus cembra, Picea, Betula, and Populus. Periodically, the landscape passed into open areas overgrown by woody tundra. The complex developed as a result of activity of a meandering river under conditions of a moderately cool climate. The younger complex includes the sand lithofacies with horizontal stratification and low-angle cross-stratification, overlain by alternating sands and silts. The topmost part is represented by sands with large- and medium scale planar cross stratification. Lack of biogenic deposits and considerable amount of frosted quartz grains in alluvial sediments indicate aeolian processes of greater intensity, periglacial conditions and evolution towards a braided or transitional river. Pollen successions, absolute dating and studies of structural and textural features of the sediment suggest that the time of its deposition may be estimated at a range between the close of the Eemian Interglacial and the Weichselian Middle Pleniglacial (OIS 5e–OIS 3).
Źródło:
Geological Quarterly; 2014, 58, 1; 71--84
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
CFD simulation study of air flow around the airfoil using the Magnus effect
Autorzy:
Sokołowski, P.
Czarnigowski, J.
Magryta, P.
Powiązania:
https://bibliotekanauki.pl/articles/117936.pdf
Data publikacji:
2015
Wydawca:
Polskie Towarzystwo Promocji Wiedzy
Tematy:
Magnus effect
simulation
air flow
Opis:
The article presents a simulation study of air flow around the airfoil equipped with an additional rotary element, using the Magnus effect to change the air flow around it. For this purpose, a two-dimensional computational model for the airfoil without and with the moving element was made. The model was based on the airfoil NACA 8-H-12. The article describes a method of creating a model in two versions: without moving computational grid and with moving computational grid. Studies were carried out for a typical flow rate corresponding to the flow velocity around the gyroplane in a nominal flight speed conditions. Article shows a comparison of flows in both cases, and assesses the impact of the geometry that use the Magnus effect on the work of airfoil.
Źródło:
Applied Computer Science; 2015, 11, 3; 19-33
1895-3735
Pojawia się w:
Applied Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
System teleopieki RevoCom jako narzędzie wspierające niezależność osób starszych
The RevoCom Telecare System as a tool that helps the elderly remain their independence
Autorzy:
Sokołowski, M. W.
Stasiełowicz, M. J.
Powiązania:
https://bibliotekanauki.pl/articles/118448.pdf
Data publikacji:
2015
Wydawca:
Politechnika Koszalińska. Wydawnictwo Uczelniane
Tematy:
teleopieka
opieka w domu
zdalna opieka
system informatyczny
sensory
terminal
panel zarządzania
telecare
care at home
remote care
IT system
sensors
management panel
Opis:
The article describes the structure and functions of RevoCom telecare system. The main purpose of this system is to monitor the environment and improve the standard of care of older people living independently in their homes. Software and applications included with the system are original project created by RevoApp team. Terminals was made by NAKAYO company, which is engaged in providing telecommunications solutions in the Japanese market. RevoCom is based on VoIP and Android technologies, and the data used in it are stored on servers in the cloud, which allows you to access them from anywhere in the world.
Artykuł opisuje budowę oraz funkcje informatycznego systemu teleopieki RevoCom. Głównym zadaniem tego systemu jest monitorowanie otoczenia w którym znajdują się seniorzy oraz polepszenie standardów opieki osób starszych mieszkających samodzielnie w swoich domach. Aplikacje wchodzące w skład systemu są autorskim projektem zespołu RevoApp, natomiast terminale wykonała firma NAKAYO, która zajmuje się dostarczaniem rozwiązań telekomunikacyjnych na rynku japońskim. System RevoCom działa w oparciu o technologie VoIP i Android, a dane wykorzystywane w systemie przechowywane są w serwerach w chmurze, co umożliwia dostęp do nich z dowolnego miejsca na świecie.
Źródło:
Zeszyty Naukowe Wydziału Elektroniki i Informatyki Politechniki Koszalińskiej; 2015, 7; 27-39
1897-7421
Pojawia się w:
Zeszyty Naukowe Wydziału Elektroniki i Informatyki Politechniki Koszalińskiej
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Hybrid heptafocal intraocular lenses
Autorzy:
Sokolowski, M
Pniewski, J.
Brygola, R
Kowalczyk-Hernandez, M
Powiązania:
https://bibliotekanauki.pl/articles/174719.pdf
Data publikacji:
2015
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
diffractive lens
hybrid lens
multifocal intraocular lens
Opis:
In this paper, hybrid diffractive-refractive multifocal intraocular lenses are proposed, which are intended to provide good visual acuity over a discrete spectrum of object distances most often encountered by patients. The proposed hybrid lenses have seven foci. It is shown that by the appropriate selection of modulation depth of a sinusoidal phase diffractive profile and the period of the sinusoid, sharp vision can be achieved for a set of distances such as 24, 29, 37, 49, 73, 145 cm, and infinity. Theoretical axial and lateral visual point spread functions are computed. An accommodative amplitude equivalent of the eye implanted with a multifocal intraocular lens is introduced and calculated for the proposed heptafocal intraocular lenses.
Źródło:
Optica Applicata; 2015, 45, 3; 285-298
0078-5466
1899-7015
Pojawia się w:
Optica Applicata
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Dokumentowanie wód termalnych : procedury i aspekty praktyczne
Geological reporting of thermal waters : procedures and practical aspects
Autorzy:
Sokołowski, J.
Socha, M.
Powiązania:
https://bibliotekanauki.pl/articles/2075312.pdf
Data publikacji:
2015
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
minerały
wody termalne
zasoby wód podziemnych
minerals
thermal waters
groundwater resource boundaries
Opis:
The paper presents legal aspects of searching, recognition and exploitation of groundwaters that are considered as minerals with a special attention to geothermal water resources. The chosen problems of geological works design were also presented in the article and several interpretation difficulties referring to groundwater resource boundaries determination in relation to spatial planning.
Źródło:
Przegląd Geologiczny; 2015, 63, 12/1; 1397--1402
0033-2151
Pojawia się w:
Przegląd Geologiczny
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Evaluation of resin composites modified with nanogold and nanosilver
Autorzy:
Sokołowski, J.
Szynkowska, M. I.
Kleczewska, J.
Kowalski, Z.
Sobczak-Kupiec, A.
Pawlaczyk, A.
Sokołowski, K.
Łukomska-Szymańska, M.
Powiązania:
https://bibliotekanauki.pl/articles/306218.pdf
Data publikacji:
2014
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
anogold
nanosilver
composite
diametral tensile strength
microhardness
ion release
light transmission
nanosrebro
kompozyty
mikrotwardość
transmisja światła
Opis:
Silver and gold have been used for centuries as antimicrobial agents. The aim of the study was to investigate diametral tensile strength, microhardness, ion release and light transmission of experimental resin composites. Flowable dental composite SDR (Dentsply, United Kingdom) was modified by nanogold, nanosilver and silica addition. The metal ion release, light transmission study, microhardness, Diametral Tensile Strength were evaluated. The experimental nanosilver-containing composites released significant amounts of Al, Si, Sr and Ba ions up to 30 days, and negligible silver ion amounts. Significant Ag ion release occurred in nanosilver- and nanogoldmodified composite. Resin composites modified with nanogold and nanosilver deposited on silica carrier exhibit lower light transmission and have opaque appearance. All experimental composites exhibited higher microhardness in comparison to non-modified resin composites. Diametral Tensile Strength of the experimental composites was comparable to the control group.
Źródło:
Acta of Bioengineering and Biomechanics; 2014, 16, 1; 51-61
1509-409X
2450-6303
Pojawia się w:
Acta of Bioengineering and Biomechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Fabrication of ceramic aggregate from phosphogypsum and power plant ash - preliminary studies
Otrzymywanie kruszywa ceramicznego z fosfogipsu i popiołów elektrownianych - badania wstępne
Autorzy:
Sokołowski, J.
Urbańska, P.
Powiązania:
https://bibliotekanauki.pl/articles/353280.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
phosphogypsum
power plant ash
lightweight aggregate
fosfogips
popioły elektrowniane
kruszywa lekkie
Opis:
The compositions of phosphogypsum and power plant ash as waste created in the production of an orthophosphoric acid and the coal combustion with the addition of fine coal were prepared. The compositions were then granulated and sintered in a muffle furnace in the atmosphere of air under the conditions previously determined. The compressive strength, open porosity and water absorption were also determined and compared with the results obtained for the commercial aggregate. Chemical and phase compositions of the aggregate were also studied. The results of the research indicate that proposed method of the high temperature utilization of phosphogypsum and power plant ash has a great potential for application and it is worth of further research.
Z odpadów po produkcji kwasu fosforowego i po energetycznym spaleniu węgla spreparowano mieszanki fosfogipsowo-popiolowe z dodatkiem węgla, zgranulowano je oraz wyznaczono parametry spiekania aglomeratów w piecu muflowym, w atmosferze powietrza. Określono wytrzymałość mechaniczną granul kruszywa, ich porowatość i nasiąkliwość oraz porównano je z parametrami kruszywa handlowego. Wyznaczono ich skład chemiczny i fazowy. Wyniki badań wskazują, że zaproponowana metoda wysokotemperaturowej utylizacji fosfogipsu i popiołów elektrownianych ma potencjał aplikacyjny, który uzasadnia prowadzenie dalszych badań.
Źródło:
Archives of Metallurgy and Materials; 2013, 58, 4; 1295-1297
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 78

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