Results 51 to 60 of about 452,581 (299)

Solar energy trap [PDF]

open access: yes, 1976
An apparatus is described for trapping solar energy for heating a fluid that could be subsequently used in turbines and similar devices. The apparatus includes an elongated vertical light pipe having an open end through which the visible spectrum of ...
Brantley, L. W., Jr.
core   +1 more source

Rotating disk electrodes to assess river biofilm thickness and elasticity [PDF]

open access: yes, 2011
The present study examined the relevance of an electrochemical method based on a rotating disk electrode (RDE) to assess river biofilm thickness and elasticity.
Azémar, Frédéric   +8 more
core   +4 more sources

Air‐Pressure–Actuated Vibroacoustic Metamaterial With Tunable Bandgap: Design, Modeling, and Characterization

open access: yesAdvanced Engineering Materials, EarlyView.
This article presents the design, modeling, and characterization of air‐pressure–actuated programmable vibroacoustic metamaterials (PVAMM). The study focuses on leveraging air pressure to dynamically tune resonance frequencies for effective noise attenuation.
William Kaal   +2 more
wiley   +1 more source

High Speed Surface Detection Method and System for Steel Pipes Based on Machine Vision

open access: yesShiyou jixie, 2022
Steel pipe is an important material for oil and gas transmission pipelines and its surface quality is extremely important. However, in practice, the surface quality of steel pipe is usually inspected manually.
Cai Xiang, Kang Yihua, Cheng Yangyang
doaj  

Design pipe bracket for vessel with using Titanium metal in marine environment [PDF]

open access: yes, 2018
The research investigates the design and utilization of the pipe bracket with titanium metal for the ocean going vessel to confront marine environment.
Ewart, Paul, He, Jianan
core  

Low‐Angle Grain Boundaries and Re‐Segregation in Single‐Crystalline Ni‐Base Superalloys

open access: yesAdvanced Engineering Materials, EarlyView.
This work demonstrates that Re‐segregation at low‐angle grain boundaries (LAGBs) in Ni‐base superalloys is influenced by misorientation angle. Advanced microscopy and atom probe tomography reveal that higher misorientation angles increases Re‐segregation.
Alireza B. Parsa   +9 more
wiley   +1 more source

Optimizing the Design of Light Pipe Systems and Collaborative Control Strategy Using Artificial-Lighting Systems for Indoor Sports Venues

open access: yesBuildings
Lighting systems in sports venues have a significant impact on both the user experience and quality of events. However, owing to the large number of luminaires, high individual lamp power, and strict lighting standards, the lighting energy consumption of
Sirui Rao, Chen Wang, Zeyu Li, Ying Yu
doaj   +1 more source

A physiological measure of shifting connections in the Rana pipiens retinotectal system [PDF]

open access: yes, 1986
The retinotectal connections of developing Rana tadpoles and froglets have been studied using light-pipe techniques to directly assay the pattern of the projection from the retina to the tectum.
Fraser, Scott E., Hunt, R. Kevin
core  

Density waves in dry granular media falling through a vertical pipe

open access: yes, 1996
We report experimental measurements of density waves in granular materials flowing down in a capillary tube. The density wave regime occurs at intermediate flow rates between a low density free fall regime and a high compactness slower flow.Comment ...
C.K.K. Lun   +21 more
core   +1 more source

Contactless medium scale industrial robot collaboration [PDF]

open access: yes, 2016
The growing cost of High-Value/Mix and Low Volume (HMLV) industries like Aerospace is heavily based on industrial robots and manual operations done by operators [1].
Asif, Seemal, Webb, Philip
core   +1 more source

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