Results 1 to 10 of about 57,891 (290)

Geometry-Dependent Photonic Nanojet Formation and Arrays Coupling [PDF]

open access: yesNanomaterials
This work systematically investigates photonic nanojet (PNJ) planar arrays formed by periodic arrangements of dielectric microstructures with four geometric configurations: cylinders, cones, truncated pyramids, and pyramids, focusing on the effects of ...
Zehua Sun   +7 more
doaj   +2 more sources

Variable-geometry solar sailing: the possibilities of the quasi-rhombic pyramid [PDF]

open access: yes, 2014
Variable geometry solar sailing potentially offers enhanced delta-V capabilities and new orbital solutions. We propose a device with such capabilities, based upon an adjustable quasi-rhombic pyramid sail geometry, and examine the benefits that can be ...
Ceriotti, Matteo   +2 more
core   +3 more sources

New Molecular Geometries with Pentagonal-Pyramidal Structure. [PDF]

open access: yesACS Omega
In this work we propose the design of molecular ions that present the same structure as the benzene dication which has a pentagonal-pyramidal geometry. The chosen systems were obtained by replacing atoms or functional groups in C6H62+ to form other species with eight valence electrons. They are: C5H6Si2+, C5H5N2+, C5H5P2+, C5H6B+ and C5H6Al+.
Oliveira RR, Wolff W, Perlin AL.
europepmc   +2 more sources

Defect Reduction in HEMT Epilayers on SiC Meta-Substrates [PDF]

open access: yesNanomaterials
Dislocation reduction in gallium nitride (GaN) epitaxial layers remains a critical challenge for high-performance GaN-based electronic devices.
Vin-Cent Su   +4 more
doaj   +2 more sources

DEVELOPMENT OF A VOXEL BASED LOCAL PLANE FITTING FOR MULTI-SCALE REGISTRATION OF SEQUENTIAL MLS POINT CLOUDS [PDF]

open access: yesISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2023
The Mobile Laser Scanner (MLS) system is one of the most accurate and fastest data acquisition systems for indoor and outdoor environments mapping.
L. Moradi   +2 more
doaj   +1 more source

Experimental investigation of geometry effects and performance of five-hole probe in measuring jets in crossflow [PDF]

open access: yesE3S Web of Conferences, 2022
Vortical and shear flows are common in turbomachinery. Multi-hole pressure probes are used in turbomachinery flows in order to provide robust and accurate measurements of both pressure and velocity components.
Magkoutas Konstantinos   +2 more
doaj   +1 more source

Copper Clusters Containing Hydrides in Trigonal Pyramidal Geometry [PDF]

open access: yesInorganic Chemistry, 2020
Structurally precise copper hydrides [Cu11H2{S2P(OiPr)2}6(C≡CR)3], R = Ph (1), C6H4F (2), and C6H4OMe (3), were first synthesized from the polyhydrido copper cluster [Cu20H11{S2P(OiPr)2}9] with nine equivalents of terminal alkynes. Later, their isolated yields were significantly improved by direct synthesis from [Cu(CH3CN)4](PF6), [NH4][S2P(OiPr)2 ...
Rhone P. Brocha Silalahi   +9 more
openaire   +3 more sources

Experimental Analysis of Several Variables Influencing Formed Thickness in Two-Point Incremental Forming Process [PDF]

open access: yesEngineering and Technology Journal, 2017
In the current paper, an experimental analysis on Al-sheet (AA 1050) with thickness 0.9 mm to reveal the effect of relevant forming factors on the formed thickness in two-point incremental forming (TPIF) process has been conducted.
A.K. Ibrahim, W.K. Hamdan
doaj   +1 more source

CONSTRUCTIVE GEOMETRY IN IMPLEMENTATIONS OF MODERN 3D GRAPHICS

open access: yesІнформаційні технології і засоби навчання, 2023
3D graphics are one of the crucial development trends of modern digital technologies. Engineering and manufacturing, architecture, design, cinematography, education, and the game industry are an incomplete list of industries where it is actively used ...
Ivan G. Lenchuk, Oleksandr O. Mosiiuk
doaj   +1 more source

POS-SUPPORTED AUTOMATIC DIGITAL SURFACE MODEL (DSM) GENERATION [PDF]

open access: yesThe International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2013
A novel method of POS supported dense matching is introduced for automatically generating DSM. The image pre-processing includes adaptive smooth filter and Wallis filter.
H. Hongyan, Z. Nan, Y. Chunyu
doaj   +1 more source

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