Results 1 to 10 of about 110,116 (295)

Valențe artistice și simbolice în creația grafică a lui Gheorghe Vrabie [PDF]

open access: yesDialogica: Revistă de Studii Culturale și Literatură, 2021
Master of arts Gheorghe Vrabie is counting among those who played a significant role in the development of the national contemporary school of graphics. He outlined the symbolic identity of the country by elaborating its main attributes – the State Coat
Elena MUSTEAȚĂ
doaj   +1 more source

Estimation of erosion phenomena within helicon plasma sources through a steady-state explicit analytical model

open access: yesFrontiers in Physics, 2022
Helicon plasma sources produce high-density discharges without the need of electrodes in direct contact with the plasma, which is thought to provide them with long operational lifetimes.
Juan I. Del Valle    +4 more
doaj   +1 more source

The growth of sapphire single crystals [PDF]

open access: yesJournal of the Serbian Chemical Society, 2001
Sapphire (Al2O3) single crystals were grown by the Czochralski technique both in air and argon atmospheres. The conditions for growing sapphire single crystals were calculated by using a combination of Reynolds and Grash of numbers.
Golubović Aleksandar   +3 more
doaj   +3 more sources

Plasma etching of polystyrene latex particles for the preparation of graphene oxide nanowalls [PDF]

open access: yesJournal of the Serbian Chemical Society, 2012
Graphene oxide nanowalls were prepared by casting a water dispersion of polystyrene latex particles onto a graphene oxide film followed by tetrafluoromethane plasma etching.
Bon Bittolo Silvia, Valentini Luca
doaj   +1 more source

Evaluation of sample temperature and applied power on degradation of stearic acid in inductively coupled radio frequency plasma [PDF]

open access: yesMaterials Research, 2014
Plasma cleaning is a promising technology in surface treatments, despite technological interest its use is limited because its mechanisms still are not entirely understood.
Carlos Eduardo Farias   +6 more
doaj   +2 more sources

The growth of Nd:CaWO4 single crystals [PDF]

open access: yesJournal of the Serbian Chemical Society, 2003
CaWO4 doped with 0.8 % at. Nd (Nd:CaWO4) single crystals were grown from the melt in air by the Czochralski technique. The critical diameter dc = 1.0 cm and the critical rate of rotation ωc = 30 rpm were calculated from hydrodynamic equations for ...
Golubović Aleksandar V.   +4 more
doaj   +1 more source

The Structural and Optical Investigation of Grown GaN Film on Porous Silicon Substrate Prepared by PLD [PDF]

open access: yesEngineering and Technology Journal, 2023
The optical properties of a grown gallium nitride (GaN) thin film on a porous silicon (P-Si) substrate was investigated. A Photo-electrochemical etching method was used to synthesize the Psi substrate, and a physical deposition method (pulsed laser ...
Haneen Jabar   +3 more
doaj   +1 more source

Manipulating etch selectivities in XeF2 vapour etching [PDF]

open access: yesJournal of Microelectromechanical Systems, 2021
The vapour etching of silicon sacrificial layers is often a critical process in the fabrication of micro/nanosystems. This method has a number of attractive features, in particular, high etch rates of sacrificial silicon layers and good selectivities associated with photoresist, SiO₂, stoichiometric Si₃N₄ and a number of regularly used metal films ...
Rondé, Markus   +2 more
openaire   +5 more sources

Silver-Coated Gold Nanorods as Optical Probes for the Sensitive Detection of Ascorbic Acid in Tablets

open access: yesChemosensors, 2022
Ascorbic acid (AA) has been widely used to improve human health since it was first found, such as resisting scurvy, enhancing immunity, and preventing arteriosclerosis.
Shuai Wen   +4 more
doaj   +1 more source

Robotic Sponge and Watercolor Painting Based on Image-Processing and Contour-Filling Algorithms

open access: yesActuators, 2022
In this paper, the implementation of a robotic painting system using a sponge and the watercolor painting technique is presented. A collection of tools for calibration and sponge support operations was designed and built.
Lorenzo Scalera   +4 more
doaj   +1 more source

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