Results 81 to 90 of about 561,826 (342)

Application of Casing Cleaning Tool with Variable Diameters in Offshore Oilfields

open access: yesShiyou jixie, 2019
To address the low efficiency, easy-to-stuck, and incapability of stuck point identification of casing cleaning operation in offshore oil and gas fields, a variable diameter casing cleaning tool has been developed.
Hao Zhouzheng   +4 more
doaj  

Development and Field Testing of a Cavitation-Based Robotic Platform for Sustainable In-Water Hull Cleaning

open access: yesJournal of Marine Science and Engineering
Biofouling on ship hulls significantly increases hydrodynamic drag, fuel consumption, and greenhouse gas emissions, while also facilitating the spread of invasive species in regional and global waters, thereby threatening marine biodiversity.
Uroš Puc   +6 more
doaj   +1 more source

Pilot Experiments with Electrodialysis and Ozonation for the Production of a Fertilizer from Urine [PDF]

open access: yes, 2007
Pilot tests were performed with a process combination of electrodialysis and ozonation for the removal of micropollutants and the concentration of nutrients in urine.
Berner, A.   +7 more
core  

Enhanced Gamma Radiation Shielding Using Epoxy Quartz Fabric Composites Reinforced With CoCl2 Microparticles

open access: yesAdvanced Engineering Materials, EarlyView.
The growing demand for lightweight, nontoxic, and multifunctional gamma shielding materials has intensified efforts to find alternatives to conventional lead and aluminum‐based protectants. In this work, we develop epoxy quartz fabric composites reinforced with cobalt chloride (CoCl2) microparticles, fabricated via hand lay‐up with varying filler ...
Summan Urooge   +7 more
wiley   +1 more source

ICA Cleaning procedure for EEG signals analysis: application to Alzheimer's disease detection [PDF]

open access: yes, 2010
To develop systems in order to detect Alzheimer’s disease we want to use EEG signals. Available database is raw, so the first step must be to clean signals properly.
Cichocki, Andrej   +5 more
core  

EBSD Study of Creep‐Induced Lattice Misorientation in MgO‐Particle‐Reinforced Austenitic Steel Composites

open access: yesAdvanced Engineering Materials, EarlyView.
Creep experiments at 900°C on coarse‐grained steel‐ceramic composites containing recycled magnesia reveal that higher ceramic volume fractions significantly enhance the creep resistance. Detailed EBSD investigations identify subgrain formation in the steel matrix as the dominant deformation mechanism.
Moritz Müller   +6 more
wiley   +1 more source

Continuous turning slip ring assembly Patent [PDF]

open access: yes, 1968
Development of slip ring assembly with inner and outer peripheral surfaces used as electrical contacts for ...
Lowe, E. G.
core   +1 more source

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

Investigation on the current status of cleaning and disinfection management of flexible endoscopes in medical institutions in Xianyang city, China

open access: yesSterile Supply
ObjectiveThis study investigates the current status of cleaning and disinfection management of flexible endoscopes in secondary medical institutions and above with central sterile supply departments (CSSDs) in Xianyang City, Shaanxi Province, China ...
Aiqun Zhu, Xianyang Liu
doaj   +1 more source

Removing Oxide Layers and Retaining Oxide‐Free Steel Surfaces by Polishing in Oxygen‐Free Atmosphere

open access: yesAdvanced Engineering Materials, EarlyView.
In this study, the efficacy of wet mechanical polishing under an oxygen‐free atmosphere for deoxidation and the retention of an oxide‐free steel surface are elucidated using X‐ray photoelectron spectroscopy. The methodology proved successful; however, the results were highly dependent on the preparation of the solvents used to clean the samples after ...
Friedrich Bürger   +2 more
wiley   +1 more source

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