Results 21 to 30 of about 1,101,968 (217)

Experimental Study on the Effectiveness of Water Mist Extinguishing Systems for Protecting Paintings in Art Gallery Museums: Developing an Initial Methodological Model

open access: yesBuildings, 2023
Determining the input parameters for the calibration of a water mist extinguishing system in a compartment is important for the evaluation of the performance of the design.
Davide Berardi   +2 more
doaj   +1 more source

Stable yellow light emission from lead-free copper halides single crystals for visible light communication

open access: yesNano Materials Science, 2023
Yellow light-emitting diodes (LEDs) as soft light have attracted abundant attention in lithography room, museum and art gallery. However, the development of efficient yellow LEDs lags behind green and blue LEDs, and the available perovskites yellow LEDs ...
Baiqian Wang   +8 more
doaj   +1 more source

Research and analysis of a thermal optimisation design method for aluminium alloy pistons in diesel engines

open access: yesCase Studies in Thermal Engineering, 2023
To further improve the thermal state of the piston for better thermal design, a multi-objective optimisation algorithm was used in this paper to find the best combination of design variables.
Yang Liu   +5 more
doaj   +1 more source

Design of microcavity resonators for single-atom detection [PDF]

open access: yes, 2007
Whispering gallery modes of a microdisk resonator are useful for the optical detection of single rubidium and cesium atoms near the surface of a substrate. Light is coupled into two high-Q whispering-gallery modes of the disk which can provide attractive
Rosenblit, Michael   +4 more
core   +1 more source

An Experimental Investigation of the Influence of Flow and Pipe Diameter on the Fire Extinguishing Efficiency of Nitrogen Injection in a Narrow Confined Underground Space

open access: yesFire, 2022
In this study, an underground pipe gallery was taken as the research subject to explore the influence of nitrogen injection flow rate and pipe diameter on the fire extinguishing efficiency in an underground narrow confined space.
Guowei Zhang   +4 more
doaj   +1 more source

Effect of flow in the circular 90-degree curved nozzles on ejecting oil jet behavior

open access: yesJournal of Fluid Science and Technology, 2021
In general, technical methods for improving the thermal efficiency of an engine increase the heat load on peripheral components. Recently, a piston cooling gallery equipped with a flow path has been developed.
Mikimasa KAWAGUCHI   +7 more
doaj   +1 more source

Fiber-Coupled Ultra-High-Q Microresonators for Nonlinear and Quantum Optics [PDF]

open access: yes, 2004
The ability to confine optical energy in small volumes for long periods of time is desirable for a number of applications, ranging from photonics and nonlinear optics, to fundamental studies in quantum electrodynamics.
Spillane, Sean Michael
core   +1 more source

MOSFET Selection for a 18ka modular power converter for HL-LHC inner triplet

open access: yesPower Electronic Devices and Components, 2023
The upgrade of the Large Hadron Collider (LHC) at CERN towards the High Luminosity-LHC (HL-LHC) presents different challenges, among them, the upgrade of the power converters associated to the inner triplet magnets to reach the required rated current of ...
N. Wassinger   +5 more
doaj   +1 more source

Visualization experiment study on oscillatory flow characteristics of two-phase flow [PDF]

open access: yesJournal of Hebei University of Science and Technology
In order to solve the oscillatory heat transfer problem of gas-liquid two-phase flow of cooling oil gallery of piston, a reciprocating oscillatory experimental device reformed by diesel engine was designed and established. The oscillatory flow process of
Hairong ZHU   +4 more
doaj   +1 more source

Spin bath maser in a cryogenically cooled sapphire whispering gallery mode resonator [PDF]

open access: yesPhysical Review B, 2013
We report the observation of a mechanism of maser generation in an ensemble of inter-coupled, inhomogeneously broadened two-level systems, enhanced by high quality factor electromagnetic cavity modes. In this previously unobserved form of population inversion, an inseparable quantum system leads to cavity-enhanced stimulated emission arising from ...
Bourhill, J.   +5 more
openaire   +2 more sources

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