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Wyświetlanie 1-15 z 38
Tytuł:
Calculation of Dune Profile Changes Generated by Hurricane: Preliminary Results
Autorzy:
Szmytkiewicz, P.
Szmytkiewicz, M.
Schönhofer, J.
Morawski, J.
Malicki, J.
Powiązania:
https://bibliotekanauki.pl/articles/241504.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Instytut Budownictwa Wodnego PAN
Tematy:
coastal zone
dune
erosion
Opis:
The paper presents the main theoretical concepts related to methods of calculating the erosion rate for sandy dunes on natural coasts, namely, the beach equilibrium profile and incident waves. To illustrate calculations of dune erosion in the vicinity of the Coastal Research Station (CRS) in Lubiatowo, the Xbeach model (an incident wave model) was used. The calculations were carried out for hydrological and hydrodynamic conditions that accompanied Hurricane Ksawery (December 6–8, 2013). The results of the calculations were compared with the measured data. A satisfactory agreement was obtained between the predicted and measured results.
Źródło:
Archives of Hydro-Engineering and Environmental Mechanics; 2018, 65, 3; 221-239
1231-3726
Pojawia się w:
Archives of Hydro-Engineering and Environmental Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Postglacial morpholineaments as an indicator of ice sheet dynamics during the Saale Glaciation in the Białystok Plateau and Sokółka Hills (NE Poland)
Autorzy:
Rychel, J.
Morawski, M.
Powiązania:
https://bibliotekanauki.pl/articles/2060371.pdf
Data publikacji:
2017
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
morpholineament
Saalian ice-sheet movement
lobe
NE Poland
Opis:
The palaeogeographical reconstruction of the deglaciation process in NE Poland during the Odranian Glaciation Wartanian Stadial (Saale MIS 6) is based mainly on the analysis of glacial morpholineaments, performed using the GIS programs that provide us with better understanding of the glacial landscape evolution, spatial reconstruction of glacial processes, and postglacial landscape development. Analysis of postglacial morpholineaments was carried out based on the Digital Elevation Model (DEM) as well as geological, geomorphological and topographic maps. It resulted in the delimitation of visible linear postglacial landforms, their identification and classification, and the determination of their genetic and chronological relations. Directions of the lineaments were determined through quantitative analysis. Qualitative analysis was applied to determine the spatial and temporal sequence of events, directions of ice movement and its range. Two glacial lobes, Biebrza and Neman, existed in the north-western part of the Białystok Plateau and Sokółka Hills during the last glacial advance. The lobed nature of the ice sheet can be confirmed by field data collected from, e.g., sites in Knyszewicze, and by topographic analysis of Quaternary sediments, combined with their thickness and genesis. The obtained reconstruction of the last glacial advance and retreat in the study area can be used in further regional discussions on the character and dynamics of the last glaciation in this region.
Źródło:
Geological Quarterly; 2017, 61, 2; 334--349
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Triplet States and Triplet Excitons in Chemically Mixed Crystals of Acridine with Anthracene
Autorzy:
Morawski, O.
Prochorow, J.
Powiązania:
https://bibliotekanauki.pl/articles/1933611.pdf
Data publikacji:
1995-09
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
31.70.Ks
33.50.Dq
71.35.+z
Opis:
Spectral and temporal characteristics and their temperature dependence for the long-lived (phosphorescence and delayed fluorescence) emission of chemically mixed crystals of acridine II (host) with anthracene (guest) were studied under conditions of various spectral resolutions and different modes of excitation. The energy of 0-0 transitions of exciton band and of trap states have been determined and the nature and energy scheme of the triplet states of crystals have been established. The complex arrangement of host molecules into two different pairs in the crystal structure of acridine II is revealed in the energetic "doublet" structure of the trap states for both, the shallow and the deep traps (of acridine and of anthracene origin, respectively). Migration of triplet excitation energy in these chemically mixed crystals is controlled predominantly by the triplet-triplet annihilation of excitons (either heterogeneous or homogeneous) almost in the whole temperature range. The formation of triplet excimers of acridine was definitely ruled out.
Źródło:
Acta Physica Polonica A; 1995, 88, 3; 469-481
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Fish-like swimming prototype of mobile underwater robot
Autorzy:
Malec, M.
Morawski, M.
Zając, J.
Powiązania:
https://bibliotekanauki.pl/articles/384363.pdf
Data publikacji:
2010
Wydawca:
Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
Tematy:
robotic fish
underwater mobile robot
biological inspiration
Opis:
In this paper, authors present a new approach to the design of a mobile underwater robot inspired by a fish. They describe a prototype of a self-designed and a self-made mobile underwater robot called the CyberFish, which resembles fish in the way it looks and behaves. In the beginning, a short consideration on fish-like swimming is presented. Then the biological inspiration for swimming robots are described by means of comparison of robots parts to fish organs. In the next section authors focus on electronic control system as well as on applications written in C/C++ that are used to control the robot in three different modes.
Źródło:
Journal of Automation Mobile Robotics and Intelligent Systems; 2010, 4, 3; 25-30
1897-8649
2080-2145
Pojawia się w:
Journal of Automation Mobile Robotics and Intelligent Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Removal of organic dye in the hybrid photocatalysis/membrane processes system
Autorzy:
Grzechulska-Damszel, J.
Morawski, A.W.
Powiązania:
https://bibliotekanauki.pl/articles/779880.pdf
Data publikacji:
2007
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
dwutlenek tytanu
fotokataliza
procesy membranowe
barwniki organiczne
układy hybrydowe
titanium dioxide
photocatalysis
membrane processes
organic dyes
hybrid systems
Opis:
The removal of azo dye Acid Red 18 in hybrid photocatalysis/membrane processes systems was investigated. The photocatalytic reactions were conducted in the reactor with photocatalyst suspended in the solution. The reaction solution was recirculated through the ultrafiltration system. A commercially available titanium dioxide (AeroxideŽ P25, Degussa, Germany) was used as a photocatalyst. The solution after the photocatalytic/UF reaction was applied as the feed for the membrane distillation process. The changes of various parameters, including the concentration of the dye, pH and the conductivity of the solution, TOC and TDS content were analyzed during the process. It was found that azo dye Acid Red 18 could be successfully decolourised in the hybrid photocatalysis/UF system. The catalyst particles were retained in the feed solution by means of the ultrafiltration membrane so the obtained permeate was free of TiO2. The application of ultrafiltration together with the photocatalytic process results in the separation of photocatalyst from the treated solution but does not give the complete removal of organic matter from the reaction mixture. Membrane distillation applied with the permeate after the photocatalysis/UF process as a feed gives a complete separation of TOC from the treated solution and the obtained product is practically pure water.
Źródło:
Polish Journal of Chemical Technology; 2007, 9, 2; 94-98
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Water purification using a novel reactor with the photoactive refill
Autorzy:
Grzechulska-Damszel, J.
Morawski, A.W.
Powiązania:
https://bibliotekanauki.pl/articles/779398.pdf
Data publikacji:
2009
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
dwutlenek tytanu
fotokataliza
reaktor przepływowy
barwniki organiczne
titanium dioxide
photocatalysis
flow reactor
photoactive coating
organic dyes
Opis:
The aim of the presented work was the removal of organic dye, Acid Red 18, from water using a novel reactor with the photoactive refill. Titanium dioxide was immobilized on the base material as a thin layer from the alcoholic suspension followed by thermal stabilization. The prepared coating exhibits high stability in repeated cycles of water treatment. The complete removal of colour was achieved in a relatively short time of 14 hours. The proposed reactor with the photoactive refill solves the problem of the necessity of the replacement of the reactor or parts of the reactor when the photocatalysts activity decreases. In the case of activity drop of the photocatalyst, only the photoactivve refill can be easily replaced.
Źródło:
Polish Journal of Chemical Technology; 2009, 11, 1; 61-63
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Cavity Ring Down Measurement of the (1, 0) B $\text{}^{2}$Σ$\text{}_{u}^{+}$ - X $\text{}^{2}$Σ$\text{}_{g}^{+}$ Absorption Band of the N$\text{}_{2}^{+}$ Cation
Autorzy:
Fulara, J.
Łapiński, L.
Morawski, O.
Prochorow, J.
Powiązania:
https://bibliotekanauki.pl/articles/1968912.pdf
Data publikacji:
1998-05
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
33.20.Lg
39.30.+w
Opis:
The ultraviolet (1, 0) B $\text{}^{2}$Σ$\text{}_{u}^{+}$ - X $\text{}^{2}$Σ$\text{}_{g}^{+}$ transition in the N$\text{}_{2}^{+}$ cation was measured with the absorption cavity ring down technique. The N$\text{}_{2}^{+}$ cations were produced in a stationary DC discharge in nitrogen under reduced ( ≈ 0.5 Tr) pressure. The weak band due to the (4, 0) A $\text{}^{2}$Π$\text{}_{u}$ - X $\text{}^{2}$Σ$\text{}_{g}^{+}$ transition in the red part of the spectrum was also recorded. Several of the observed transitions correspond to absorptions from the vibrationally excited (ν'=1) states of N$\text{}_{2}^{+}$ and to absorptions from the neutral N$\text{}_{2}$ molecules in the triplet state.
Źródło:
Acta Physica Polonica A; 1998, 93, 5-6; 723-730
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Thermally Stimulated Electron Emission from K-Bi-GICs
Autorzy:
Chrzanowski, J.
Klimkiewicz, R.
Morawski, A. W.
Powiązania:
https://bibliotekanauki.pl/articles/1968867.pdf
Data publikacji:
1998-03
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
71.20.Tx
79.75.+g
79.20.Kz
Opis:
The results of the investigations of thermally stimulated electron emission from graphite submitted to intercalation of K-Bi alloy, in the temperature range of 100-400 K, are presented. Total and partial pressure in the measuring chamber in relation to the temperature of the sample are also reported. The insertion of a K-Bi alloy into the interlayers of graphite considerably changes thermally stimulated electron emission properties. The emission images I(T) depend on the content of intercalate and the emission maxima obtained at temperatures of about 170 and 210 K are conditioned by the desorption of a gas while the total pressure above the different samples is of the same order. The desorption of gases at a temperature over 250 K does not cause any increase in the electron emission.
Źródło:
Acta Physica Polonica A; 1998, 93, 3; 531-537
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Comparison of five SVD-based algorithms for calibration of spectrophotometric analyzers
Autorzy:
Wagner, J.
Morawski, R. Z.
Miękina, A.
Powiązania:
https://bibliotekanauki.pl/articles/220564.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
spectrophotometry
chemometrics
singular value decomposition
regularisation
food analysis
edible oils analysis
Opis:
Spectrophotometry is an analytical technique of increasing importance for the food industry, applied i.a. in the quantitative assessment of the composition of mixtures. Since the absorbance data acquired by means of a spectrophotometer are highly correlated, the problem of calibration of a spectrophotometric analyzer is, as a rule, numerically ill-conditioned, and advanced data-processing methods must be frequently applied to attain an acceptable level of measurement uncertainty. This paper contains a description of four algorithms for calibration of spectrophotometric analyzers, based on the singular value decomposition (SVD) of matrices, as well as the results of their comparison - in terms of measurement uncertainty and computational complexity - with a reference algorithm based on the estimator of ordinary least squares. The comparison is carried out using an extensive collection of semi-synthetic data representative of trinary mixtures of edible oils. The results of that comparison show the superiority of an algorithm of calibration based on the truncated SVD combined with a signal-to-noise ratio used as a criterion for the selection of regularisation parameters - with respect to other SVD-based algorithms of calibration.
Źródło:
Metrology and Measurement Systems; 2014, 21, 2; 191-204
0860-8229
Pojawia się w:
Metrology and Measurement Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Adsorption of humic acid on mesoporous carbons prepared from poly- (ethylene terephthalate) templated with magnesium compounds
Autorzy:
Karolczyk, J.
Mozia, S.
Morawski, A.W.
Przepiórski, J.
Powiązania:
https://bibliotekanauki.pl/articles/778949.pdf
Data publikacji:
2012
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
porous carbon
adsorption
humic acid
fluorescence spectroscopy
Opis:
Porous carbons obtained from poly(ethylene terephtalate) contained in a mixture with either MgCO3 or Mg(OH)2 were examined as adsorbents for removal of humic acid from water. Adsorption of the model contaminants is discussed in relation to the textural parameters of the obtained carbon materials. Pore structure parameters of the carbonaceous materials were strongly influenced by preparation conditions including temperature and relative amounts of the inorganics used during preparations as template. Porous carbons prepared revealed a potential to purify water from the model contaminant of high molecular weight. The results presented confirmed a key role of mesoporosity in the adsorption of humic acid. Fluorescence spectroscopy was confirmed to be an useful method to evaluate concentration of humic acid in water.
Źródło:
Polish Journal of Chemical Technology; 2012, 14, 4; 95-99
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Metastrongylus asymmetricus [Noda, 1973] - nicień płucny po raz pierwszy notowany u dzika w Polsce
The first record of the lungworm, Metastrongylus asymmetricus [Noda, 1973], in the wild boar from Poland
Autorzy:
Nosal, P
Morawski, P.
Kowal, J.
Nowosad, B.
Powiązania:
https://bibliotekanauki.pl/articles/2143582.pdf
Data publikacji:
2009
Wydawca:
Polskie Towarzystwo Parazytologiczne
Tematy:
nicienie plucne
Polska
Metastrongylus asymmetricus
dzik
pasozyty
inwazja pasozytnicza
Opis:
A total of 17 wild boars (Sus scrofa) shot in the Miechów hunting area (southern Poland) during two consecutive winters of 2008, were surveyed for the presence of lung nematodes of the genus Metastrongylus. The animals were necropsied, their lungs removed, divided into smaller parts and examined along the bronchial tubes. The parasites found were identified based on their morphologic characters. The prevalence of the lungworms reached 76.5%, and all of the 13 infected animals harboured two (one boar) or more parasite species. The mean number of parasites in an individual boar was 58.7, ranging from 6 to 250 specimens. Out of 250 identified lungworms, 48.8% was identified as M. pudendotectus, 32.8% were M. elongatus, and 14.0% belonged to M. salmi, whereas 4.4% (i.e. 10 females and 2 males) were M. asymmetricus. Until recently, only four Metastrongylus species have been recorded from Poland, namely M. elongatus, M. pudendotectus, M. salmi and M. confusus. The presently reported finding of M. asymmetricus constitutes the first record of this species in Poland.
Źródło:
Wiadomości Parazytologiczne; 2009, 55, 3; 227-230
0043-5163
Pojawia się w:
Wiadomości Parazytologiczne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Metastrongylus asymmetricus [Noda, 1973] - nicien plucny po raz pierwszy notowany u dzika w Polsce
The first record of the lungworm, Metastrongylus asymmetricus [Noda, 1973], in the wild boar from Poland
Autorzy:
Nosal, P
Morawski, P.
Kowal, J.
Nowosad, B.
Powiązania:
https://bibliotekanauki.pl/articles/840045.pdf
Data publikacji:
2009
Wydawca:
Polskie Towarzystwo Parazytologiczne
Tematy:
nicienie plucne
Polska
Metastrongylus asymmetricus
dzik
pasozyty
inwazja pasozytnicza
Źródło:
Annals of Parasitology; 2009, 55, 3; 227-230
0043-5163
Pojawia się w:
Annals of Parasitology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
System do pomiaru parametrów fal i wiatru do zastosowania w badaniach modelowych statków
Wind and wave measurement system for trails on ship models
Autorzy:
Sikora, P.
Sokół, R.
Morawski, L.
Pomirski, J.
Powiązania:
https://bibliotekanauki.pl/articles/158374.pdf
Data publikacji:
2008
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
anemometr
miernik falowania
zakłócenia wiatrowe
zakłócenia falowe
anemometer
waves level sensor
wind disturbances
waves disturbances
Opis:
W artykule omówiono budowę systemu do rejestracji zakłóceń falowych i wiatrowych, który stosowany jest podczas badań układów sterowania przeprowadzanych na izomorficznych modelach statków na jeziorze Silm koło Iławy. Pomiar zakłóceń wiatrowych wykonywany jest anemometrem ultradźwiękowym. Do pomiaru falowania wykorzystano czujnik pojemnościowy, który zmienia swoją pojemność w zależności od zanurzenia w wodzie. System mikroprocesorowy umieszczony w mierniku zapewnia pośredni pomiar pojemności czujnika falowania, odczyt parametrów wiatru z anemometru, a także retransmisję pomierzonych danych poprzez łącze radiowe do komputera rejestrującego.
The paper presents a design of the system for registration of wind and wave disturbances. The system is useful for investigations of control systems performed on isomorphic ship models on the Silm Lake near Iława. An ultrasonic anemometer has been used for wind disturbance measurements. In order to measure the wave level measurement a capacity sensor has been used. It changes its capacitance due to immersion in water. A microprocessor system performs indirect measurements of the wave sensor capacitance. Moreover, it receives the measurement data from an anemometer and transmits them to a registering computer through a radio link (Fig. 1).
Źródło:
Pomiary Automatyka Kontrola; 2008, R. 54, nr 12, 12; 817-819
0032-4140
Pojawia się w:
Pomiary Automatyka Kontrola
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
CyberRyba - podwodny robot mobilny
CyberFish - mobile undrewater robot
Autorzy:
Malec, M.
Morawski, M.
Wojtas, D.
Zając, J.
Powiązania:
https://bibliotekanauki.pl/articles/275462.pdf
Data publikacji:
2010
Wydawca:
Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
Tematy:
roboty mobilne
podwodny robot mobilny
mobile robots
mobile underwater robot
Opis:
W pracy autorzy przedstawili koncepcję, projekt oraz prototyp sztucznej ryby - podwodnego robota mobilnego. Przeanalizowano sposób poruszania się ryb. Omówiono projekt wykonany w systemie CAD/CAM/CAE CATIA. Autorzy skoncentrowali się na najwierniejszym odwzorowaniu ruchów żywej ryby. Przedstawiono szczegóły budowy CyberRyby i zaprezentowano sposób jej działania. Omówiono opracowany system sterowania i przedstawiono tryby jego pracy.
In this paper authors describe concept, design and build of fish-like underwater mobile robot. In the beginning, they consider shortly how a fish moves when it swims. Then the 3D model designed in CAD/CAM/CAE CATIA software is described. Next chapter presents some details of how CyberFish is build and operates underwater. The authors focused on maximal representation of fish-like movement. Moreover, the paper describes mobile robot electronic control system and discusses its applications.
Źródło:
Pomiary Automatyka Robotyka; 2010, 14, 2; 331-340
1427-9126
Pojawia się w:
Pomiary Automatyka Robotyka
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 38

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