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Wyświetlanie 1-2 z 2
Tytuł:
Computational fluid dynamics (CFD) aided design of a multi-rotor flying robot for locating sources of particulate matter pollution
Autorzy:
Suchanek, Grzegorz
Filipek, Roman
Powiązania:
https://bibliotekanauki.pl/articles/38435217.pdf
Data publikacji:
2022
Wydawca:
Polskie Towarzystwo Promocji Wiedzy
Tematy:
computational fluid dynamics
PM pollution
propeller aerodynamics
multi-rotor robot design
Opis:
The use of flying robots for various environmental protection issues is a very important and current research topic. Designing a dedicated multi-rotor flying robot is necessary for the efficient and automated localization of sources of air pollution, especially solid particles. In particular, one of the most important requirements that must be met by such a robot is its appropriate impact on the measurement process, i.e., increasing the sensitivity of sensors or reducing the interference. This is particularly difficult because its rotating rotors introduce significant disturbances to the surrounding fluid. In these studies, the design process is supported by the creation of a mathematical flow model and a series of analyzes to optimize the PM measurement system. The model is built using the finite-volume method in ANSYS Fluent software and steady-state RANS averaging. First, a flow field model with one propeller was modeled and its parameters identified by comparison with the results from the dedicated original dynamometer stand -- characteristics of the propeller performance. On the basis of the simulations and measurement of one rotor, subsequent systems of the highest practical importance are built. The effect of that design process was the preparation and testing of a functional robot prototype. The field parameter distributions resulting from the analyzes, in particular the turbulence intensity, allow one to propose a criterion on the basis of which both the best rotor configuration and localization of sensors are selected.
Źródło:
Applied Computer Science; 2022, 18, 3; 86-104
1895-3735
2353-6977
Pojawia się w:
Applied Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Tridentate hydrazido-hydrazones vanadium complexes. Synthesis, properties and biological activity
Autorzy:
Szklarzewicz, Janusz
Jurowska, Anna
Hodorowicz, Maciej
Matoga, Dariusz
Gryboś, Ryszard
Filipek, Barbara
Sapa, Jacek
Głuch-Lutwin, Monika
Mordyl, Barbara
Kazek, Grzegorz
Powiązania:
https://bibliotekanauki.pl/articles/93144.pdf
Data publikacji:
2019
Wydawca:
Państwowa Wyższa Szkoła Zawodowa w Tarnowie
Tematy:
vanadium
complex
Schiff base
structure
hydrazide
biological activity
wanad
kompleks
baza Schiffa
Struktura
hydrazyd
aktywność biologiczna
Opis:
Nine new vanadium complexes, with tridentate Schiff base ligand based on 3,5-di-tertbutyl-2-hydroxybenzaldehyde and different hydrazides, are described and characterized. The X-ray crystal structure of complex 8 shows distorted octahedral geometry of vanadium, with ONO ligand in equatorial position. The tridentate Schiff base ligand forms six membered and five-membered chelate rings at the V(V) acceptor center, with the corresponding bite angles being 82.97(9)˚ and 74.48(9)˚. The molecules are gathered by means of intermolecular OH...N hydrogen bond and layered by π...π interactions involving the pyridine and phenolate rings. Such interactions expand the structure along the crystallographic a axis. The complexes were characterized by the elemental analyses, IR, UV-Vis, EPR spectroscopy, cyclic voltammetry, thermogravimetry and magnetic susceptibility measurements. The stabilization role of co-ligands is discussed. The cytotoxicity versus HepG2 hepatocytes and inhibition of human recombinant PTP1B was studied.
Źródło:
Science, Technology and Innovation; 2019, 4, 1; 9-20
2544-9125
Pojawia się w:
Science, Technology and Innovation
Dostawca treści:
Biblioteka Nauki
Artykuł
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