Results 31 to 40 of about 422,840 (291)

A photonic crystal nanocavity laser in an optically very thick slab [PDF]

open access: yes, 2011
A photonic crystal (PhC) nanocavity formed in an optically very thick slab can support reasonably high-Q modes for lasing. Experimentally, we demonstrate room-temperature pulsed lasing operation from the PhC dipole mode emitting at 1324 nm, which is ...
Huang, Jingqing   +2 more
core   +3 more sources

Development of an algorithm to generate and evaluate cutting solutions in edging and trimming operations at sawmills

open access: yesRevista Facultad de Ingeniería Universidad de Antioquia, 2012
In this research work an algorithm that gathers the best procedures applied in sawmills was developed, along with a methodology based on cutting geometrical line analysis.
Francisco Vergara González   +2 more
doaj   +1 more source

Large-amplitude Electron Oscillations in a Plasma Slab [PDF]

open access: yes, 2006
Nonlinear oscillations within a plasma slab are analyzed. Two types of solutions are found, depending on the initial value of the electron density. The first represents regular oscillations within the plasma slab, while the second gives rise to explosive
Brodin, G.   +3 more
core   +1 more source

Effect of concrete strength and thickness of flat slab on preventing of progressive collapse caused by elimination of an internal column [PDF]

open access: yesJournal of Structural and Construction Engineering, 2019
Designing structures against progressive collapse is an important part of the building design. However, some guidelines such as GSA and UFC holds implications for reducing the risk of progressive collapse of structures, but because the nature of the ...
Atefeh Soleymani, mohammad Reza Esfahani
doaj   +1 more source

Aging and distributional tone learning: the role of pitch memory in older adults’ discrimination of mandarin lexical tones

open access: yesLanguage and Cognition
Distributional learning enables listeners to form phonetic categories by extracting statistical regularities from speech input. Younger Cantonese speakers can acquire the Mandarin level-falling (T1–T4) contrast through distributional learning, with ...
Yin-To Chui, Susu Lai, Quentin Zhen Qin
doaj   +1 more source

Review of seismic velocity anomalies in the lower mantle

open access: yes地球与行星物理论评, 2023
The lower mantle accounts for more than 50% of the total volume of the Earth, and influences the evolution of the Earth. Early studies showed that the lower mantle is relatively homogeneous, but since the 1970s, seismic tomography revealed the velocity ...
Yutong Shi   +4 more
doaj   +1 more source

Formation of Fluctuations in the Molecular Slab via Isobaric Thermal Instability [PDF]

open access: yes, 2007
The frictional heating by ion-neutral drift is calculated and its effect on isobaric thermal instability is carried out. Ambipolar drift heating of one-dimensional self-gravitating magnetized molecular slab is used under the assumptions of quasi ...
Nejad-Asghar, M.
core   +1 more source

Fluid Flow, Solidification and Solute Transport in Slab Continuous Casting with Different S-EMS Installation Positions

open access: yesMetals
During continuous slab casting, strand electromagnetic stirring (S-EMS) has a significant effect on improving the slab quality. In the current work, a numerical model based on the practical slab continuous casting machine and coupled electromagnetic ...
Daiwei Liu   +3 more
doaj   +1 more source

Pairwise summation approximation for Casimir potentials and its limitations

open access: yes, 2012
We investigate the error made by the pairwise summation (PWS) approximation in three geometries where the exact formula for the Casimir interaction is known: atom-slab, slab-slab and sphere-slab configurations.
Bitbol, Anne-Florence   +3 more
core   +3 more sources

Juan de Fuca subduction zone from a mixture of tomography and waveform modeling [PDF]

open access: yes, 2012
Seismic tomography images of the upper mantle structures beneath the Pacific Northwestern United States display a maze of high-velocity anomalies, many of which produce distorted waveforms evident in the USArray observations indicative of the Juan de ...
Chu, Risheng   +2 more
core   +1 more source

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