Results 21 to 30 of about 2,581,564 (248)

Development of Three-Dimensional Non-Contact Surface Profilometer and Application to Evaluation of Impact Erosion of Metal Matrix Composites

open access: yesTribology Online, 2008
A three dimensional non-contact surface profilometer system which can measure a wide area (order of square milli-meters) with high resolution (sub micro meter) has been completed.
Yoshiro Iwai   +5 more
doaj   +1 more source

A comparison between profile and areal surface roughness parameters [PDF]

open access: yesMetrology and Measurement Systems, 2021
Surface roughness has an important influence on the service performance and life of parts. Areal surface roughness has the advantage of accurately and comprehensively characterizing surface microtopography.
Baofeng He, Siyuan Ding, Zhaoyao Shi
doaj   +1 more source

Application of wavelet analysis in tool wear evaluation using image processing method [PDF]

open access: yes, 2018
Tool wear plays a significant role for proper planning and control of machining parameters to maintain the product quality. However, existing tool wear monitoring methods using sensor signals still have limitations.
Lee, Woon Kiow   +5 more
core   +1 more source

The Abell 85 BCG: a nucleated, core-less galaxy [PDF]

open access: yes, 2016
New high-resolution r band imaging of the brightest cluster galaxy (BCG) in Abell 85 (Holm 15A) was obtained using the Gemini Multi Object Spectrograph.
Donzelli, Carlos J., Madrid, Juan P.
core   +2 more sources

Finite Element Study of the Effect of Internal Cracks on Surface Profile Change due to Low Loading of Turbine Blade

open access: yesApplied Sciences, 2020
Turbine blades for thermal power plants are exposed to severe environments, making it necessary to ensure safety against damage, such as crack formation. A previous method detected internal cracks by applying a small load to a target member.
Junji Sakamoto   +3 more
doaj   +1 more source

Evaluation of the height of internal periodic triangular surfaces by ultrasonic backscatter

open access: yesMechanical Engineering Journal, 2018
Surface texture is an important parameter which affects functions and performance of industrial components. Although stylus and optical techniques are commonly used for evaluating the surface topology, they are applicable only to accessible surfaces.
Chanh Nghia NGUYEN   +2 more
doaj   +1 more source

Analysis of 3D Printed Dielectric Resonator Antenna Arrays for Millimeter-Wave 5G Applications

open access: yesApplied Sciences
This paper explores the potential use of fused deposition modeling (FDM) technology for manufacturing microwave and millimeter-wave dielectric resonator antennas (DRAs) for 5G and beyond communication systems.
Siyu Li   +3 more
doaj   +1 more source

Theoretical Model of Curved Liquid Surface in the Microholes for Molding Microlenses

open access: yesOptics
Microlenses are essential optics widely used in many fields. The microfluidics-assisted fabrication method provides a rapid, convenient way to manufacture microlenses. However, there is no mathematical model to describe the profile of the liquid surface.
Yuyang Shi   +5 more
doaj   +1 more source

Models for Prediction of Surface Roughness in a Face Milling Process Using Triangular Inserts

open access: yesLubricants, 2019
Research was carried out to develop a mathematical model based on the cutting tool surface profile geometry to predict surface roughness in face milling.
Rui Wang   +4 more
doaj   +1 more source

Confirmation of the compactness of a z=1.91 quiescent galaxy with Hubble Space Telescope's Wide Field Camera 3

open access: yes, 2010
We present very deep Wide Field Camera 3 (WFC3) photometry of a massive, compact galaxy located in the Hubble Ultra Deep Field. This quiescent galaxy has a spectroscopic redshift z=1.91 and has been identified as an extremely compact galaxy by Daddi et ...
Beckwith   +19 more
core   +1 more source

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