Results 51 to 60 of about 1,642,785 (302)

Research on attenuation motion test at oblique incidence based on double-N six-light-screen system

open access: yesOpen Physics, 2022
To improve the photoelectric test accuracy of moving objects, in this study, the speed attenuation caused by air resistance was introduced into the double-N six-light-screen test system, and the test system was theoretically analyzed through oblique ...
Yang Xiaodong   +3 more
doaj   +1 more source

RRS James Cook Cruise 10, 13 May-07 Jul 2007. Hotspot ecosystems in the NE Atlantic, UK contribution to the HERMES Project. Mud volcanoes in the Gulf of Cadiz; submarine canyons west of Portugal; submarine canyons in the northern Bay of Biscay [PDF]

open access: yes, 2007
The major objective of RRS James Cook Cruise 10 was to increase our understanding of how seafloor environmental variables affect the biodiversity, structure, function and dynamics of faunal communities in two specific ‘biological hotspot’ environments ...
Masson, D.G., Weaver, P.P.E.
core  

Cyclic Olefin Copolymers as Versatile Materials for Advanced Engineering Applications

open access: yesAdvanced Functional Materials, EarlyView.
Cyclic olefin copolymers (COCs) are presented as highly versatile materials combining tunable synthesis, excellent optical properties, and mechanical robustness. Their potential spans microfluidics, bioengineering, and advanced electronics, while emerging self‐healing and sustainable solutions highlight future opportunities.
Giulia Fredi   +3 more
wiley   +1 more source

Communication Distance Test of Pulse MWD System for Mining Mud

open access: yesIOP Conference Series: Earth and Environmental Science, 2020
Abstract Aiming at the problem of limited communication distance when the current wireline measurement system is applied in directional drilling to realize the advanced detection and control of mine disaster factors, a mine mud pulse measurement-while-drilling (MWD) system has been developed.
Jun Gao, Shan Li, Qian Xu
openaire   +1 more source

Large‐Area 2D Metasurface‐Based Triboelectric E‐Skin Arrays: Contact & Proximity Tactile Mapping with Broadband Acoustic Readouts

open access: yesAdvanced Materials, EarlyView.
Metasurface‐engineered NC‐TENG arrays integrate tactile pressure mapping, non‐contact gesture sensing, and acoustic signal readouts in one ultrathin module, and outperforms pristine PDMS in terms of electrical output and real‐time spatial mapping for next‐gen wearables.
Injamamul Arief   +12 more
wiley   +1 more source

Acoustic attenuation of cohesive sediments (mud) at high ultrasound frequencies

open access: yes, 2022
The acoustic attenuation of cohesive sediment (mud) at high frequencies ranging from 0.5 MHz to 5.0 MHz is determined. Conventional laboratory experiments based on the pulse-echo technique were performed using a single element immersible ultrasound ...
Brouwers, Bart   +2 more
core   +1 more source

Next‐Generation Water Treatment With Molybdenum Disulfide: Dual‐Functionality in Pollutant Adsorption and Photocatalysis

open access: yesAdvanced Materials Technologies, EarlyView.
ABSTRACT Molybdenum disulfide (MoS2) has attracted attention as a promising material due to the growing demand for environmentally friendly, cost‐effective, and efficient water treatment techniques. With its physicochemical characteristics, this stratified bidimensional material allows it to be highly effective in adsorption and catalytic performance ...
Pariksha Bishnoi   +4 more
wiley   +1 more source

Experimental Study of Formation Damage during Underbalanced-Drilling in Naturally Fractured Formations

open access: yesEnergies, 2011
This paper describes an experimental investigation of formation damage in a fractured carbonate core sample under underbalanced drilling (UBD) conditions.
Siroos Salimi, Ali Ghalambor
doaj   +1 more source

Recent Advances and Challenges in Ammonia‐Hydrogen Energy Conversion

open access: yesAdvanced Science, EarlyView.
This work summarizes the latest progress of various catalytic methods in ammonia‐hydrogen energy conversion. The challenges and outlook of ammonia‐hydrogen energy conversion system are also emphasized. This work expects to build a blueprint of renewable and efficient ammonia‐hydrogen energy conversion systems under mild conditions.
Menghao Lv   +6 more
wiley   +1 more source

Directional Underbalanced Drilling Success With Up to 40% Nitrogen Using Mud-Pulse MWD and Rotary Steerable Technology

open access: yes, 2017
This paper describes the successful use of mud-pulse Measurement While Drilling (MWD) and Rotary Steerable directional systems (RSS) in an Underbalanced Drilling (UBD) environment utilising up to 40% nitrogen.
Ken Sudron, Lee Dolman
core   +1 more source

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