Results 21 to 30 of about 1,470,168 (332)

Step-By-Step Modeling and Demetallation Experimental Study on the Porous Structure in Zeolites

open access: yesMolecules, 2022
The organization of microporous space in zeolites is discussed. A new step-by-step model is proposed that explains the principles of organizing the hierarchy of microporous space at the stage of assembling zeolites from elements of minimal size: a ...
Pavel Kononov   +4 more
doaj   +1 more source

SnO2-Based Porous Nanomaterials: Sol-Gel Formation and Gas-Sensing Application

open access: yesGels, 2023
Porous nanocomposites using two (tin dioxide–silica dioxide) and three (tin dioxide–indium oxide-silica dioxide)-component systems for gas sensors were created with the sol–gel method.
Irina Kononova   +2 more
doaj   +1 more source

The Plumb-Line Matching Algorithm for UAV Oblique Photographic Photos

open access: yesRemote Sensing, 2023
Building facades has always been a challenge for feature matching in oblique photogrammetry due to weak textures, non-Lambertian objects, severe occlusion, and distortion.
Xinnai Zhang   +4 more
doaj   +1 more source

The GeoModel tool suite for detector description [PDF]

open access: yesEPJ Web of Conferences, 2021
The GeoModel class library for detector description has recently been released as an open-source package and extended with a set of tools to allow much of the detector modeling to be carried out in a lightweight development environment, outside of large ...
Bandieramonte Marilena   +4 more
doaj   +1 more source

Kinematic Differential Geometry of a Line Trajectory in Spatial Movement

open access: yesAxioms, 2023
This paper investigates the kinematic differential geometry of a line trajectory in spatial movement. Specifically, we provide a theoretical expression of inflection line congruence, which is the spatial equivalent of the inflection circle of planar ...
Areej A. Almoneef, Rashad A. Abdel-Baky
doaj   +1 more source

Nut Geometry Inspection Using Improved Hough Line and Circle Methods

open access: yesSensors, 2023
Nuts are the cornerstone of human industrial construction, especially A-grade nuts that can only be used in power plants, precision instruments, aircraft, and rockets.
En-Yu Lin   +2 more
doaj   +1 more source

Significance of the suture line in cephalopod taxonomy revealed by 3D morphometrics in the modern nautilids Nautilus and Allonautilus

open access: yesScientific Reports, 2021
Assessing the taxonomic importance of the suture line in shelled cephalopods is a key to better understanding the diversity of this group in Earth history.
Amane Tajika   +2 more
doaj   +1 more source

Kinematic Geometry of a Timelike Line Trajectory in Hyperbolic Locomotions

open access: yesAxioms, 2023
This study utilizes the axodes invariants to derive novel hyperbolic proofs of the Euler–Savary and Disteli formulae. The inflection circle, which is widely recognized, is situated on the hyperbolic dual unit sphere, in accordance with the principles of ...
Areej A. Almoneef, Rashad A. Abdel-Baky
doaj   +1 more source

Clues to Quasar Broad Line Region Geometry and Kinematics [PDF]

open access: yes, 2000
We present evidence that the high-velocity CIV lambda 1549 emission line gas of radio-loud quasars may originate in a disk-like configuration, in close proximity to the accretion disk often assumed to emit the low-ionization lines.
B. J. Wilkes   +8 more
core   +3 more sources

Line geometry and 3D graphic statics

open access: yesGrađevinar, 2019
The mathematical basis for the line geometry, with the line as its basic element, is presented in the paper because the forces that act on a body in space - whether we are interested in conditions of movement or immobility (balance) of that body - are ...
Iva Kodrnja   +2 more
doaj   +1 more source

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