Results 41 to 50 of about 305,280 (307)

THE DEVELOPMENT OF A ROTATION SURFACE GENERATED BY HYPOCYCLOID WITH 4 BRANCHES [PDF]

open access: yesFiabilitate şi Durabilitate, 2016
This paper proposes a method for determining a development of the rotation surface, which is the rotation of hypocycloids with 4 branches. It has been chosen a four-cusped hypocycloid called astroid, because, due to its aesthetic shape, this could be ...
Liliana LUCA
doaj  

Surface differential rotation and photospheric magnetic field of the young solar-type star HD 171488 (V889 Her) [PDF]

open access: yes, 2006
We present spectropolarimetric observations of the young, single early G-dwarf HD 171488. These observations were obtained over a five-night period in 2004 September at the 3.9-m Anglo-Australian Telescope using the SEMPOL spectropolarimeter visitor ...
Donati, J-F.   +7 more
core   +1 more source

Friction Stir Processing of Heat Treated A380 Al Alloy to Enhance Surface Characteristics

open access: yesIraqi Journal of Industrial Research, 2022
Friction stir processing (FSP) has been increasingly used to improve the surface characteristics of Al alloys. Investigation on FSP of heat-treated A380 Al alloy was performed to examine the impact of tool rotation speed on the surface characteristics ...
Akeel Dhahir Subhi   +1 more
doaj   +1 more source

Pengaruh Sudut Potong dan Kecepatan Putaran Spindel Terhadap Kekasaran Permukaan pada Proses Bubut Mild Steel ST 37

open access: yesInvotek: Jurnal Inovasi Vokasional dan Teknologi, 2019
The surface quality of turning can be influenced by several factors such as determining the spindle rotation speed, determining cutting speed (cutting speed), cut angle.
Yufrizal A   +4 more
doaj   +1 more source

Meta-Structure Surface Based on Dielectric Tensor Rotation Induced by AC Electric Field for Insulation Improvement

open access: yesFrontiers in Materials, 2022
Electric field distribution along gas–solid interfaces determines the reliability of insulating components. However, the dielectric gradient insulating component prepared by the conventional method is considered to only control the internal electric ...
Zikui Shen   +5 more
doaj   +1 more source

Rotation-Assisted Hydrothermal Synthesis of Thermally Stable Multiwalled Titanate Nanotubes and Their Application to Selective Catalytic Reduction of NO with NH3 [PDF]

open access: yes, 2018
Titanate nanotubes are widely applied in various fields, including photocatalysts and electronic devices, but their weak thermal stability limits their application for catalyst support.
Inhak Song (5522414)   +5 more
core   +1 more source

Multiposition Rotation Interference Absolute Measurement Method for High-Precision Optical Component Surfaces

open access: yesInternational Journal of Optics, 2021
Modern optical engineering requires increasingly sophisticated interferometry methods capable of conducting subnanometer scale measurements of the large aperture, high-precision optical component surfaces.
Xueliang Zhu   +4 more
doaj   +1 more source

Surface-Mounted Molecular Rotors with Variable Functional Groups and Rotation Radii [PDF]

open access: yes, 2018
A strategy for designing and activating surface-mounted molecular rotors with variable rotation radii and functional groups is proposed and demonstrated.
Tobias Blömker (2303380)   +5 more
core   +1 more source

Nuclear surface acoustic resonance with spin-rotation coupling

open access: yesPhysical Review Research, 2020
We show that, under an appropriate out-of-plane static magnetic field, nuclear spins in a thin specimen on a surface acoustic wave (SAW) cavity can be resonantly excited and detected through spin-rotation coupling.
Koji Usami, Kazuyuki Takeda
doaj   +1 more source

Asteroseismic measurement of surface-to-core rotation in a main-sequence star*

open access: yesEPJ Web of Conferences, 2015
We have discovered rotationally split core g-mode triplets and surface p-mode triplets and quintuplets in a terminal age main-sequence A star, KIC 11145123, that shows both δ Sct p-mode pulsations and γ Dor g-mode pulsations.
Kurtz Donald W.   +5 more
doaj   +1 more source

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