Results 71 to 80 of about 3,450,723 (274)

Interaction of a surface acoustic wave with a two-dimensional electron gas

open access: yes, 2005
When a surface acoustic wave propagates on the surface of a GaAs semiconductor, coupling between electrons in the two-dimensional electron gas beneath the interface and the elastic host crystal through piezoelectric interaction will attenuate the SAW ...
Hu Zhao   +3 more
core   +1 more source

Al–Cu Composite Casting of Laser‐Deoxidized Copper: Bonding, Interfacial Chemistry, and Thermal Conductivity

open access: yesAdvanced Engineering Materials, EarlyView.
This study investigates laser‐based oxide removal of Cu inserts in oxygen‐free conditions and examines long‐term oxidation kinetics and surface chemistry under different atmospheres via X‐ray photoelectron spectroscopy. Al–Cu compound casting with differently oxidized surfaces is performed, and intermetallic phase formation, morphology, and thermal ...
Timon Steinhoff   +9 more
wiley   +1 more source

PEMODELAN SAW UNTUK MENENTUKAN TINGKAT DEPRESI GAMER

open access: yesJurnal Dialektika Informatika, 2020
Perkembangan teknologi saat ini melahirkan banyak permainan berbasis gadget dan internet yang menarik. Seerorang dapat bermain game untuk menghilangkan kepenatan dan memperoleh perasaan bahagia.
Dewa Caniaghi   +2 more
doaj   +1 more source

Unsteady flow, clusters and bands in a model shear-thickening fluid

open access: yes, 2019
We analyse the flow curves of a two-dimensional assembly of granular particles which are interacting via frictional contact forces. For packing fractions slightly below jamming, the fluid undergoes a large scale instability, implying a range of stress ...
Grob, Mathias   +3 more
core   +1 more source

Pyramidal Structures on Yttria‐Stabilized Zirconia after High Temperature Exposure at 1500°C: New Features on an Old Material

open access: yesAdvanced Engineering Materials, EarlyView.
New features on yttria‐stabilized zirconia after exposure at 1500°C: Newly discovered pyramidal structures on an old material. After exposure at 1550°C on the cross section of YSZ new features, namely pyramidal structures are discovered. These structures grow with time, increase in numbers, appear as singularities, are often arranged in strings, and ...
Doris Sebold   +2 more
wiley   +1 more source

Analyzing the Vulnerability of Urban Building during Environmental Hazard (Earthquake) Using MCDM+GIS Method (Case study: Region 6 of Tehran) [PDF]

open access: yesجغرافیا و پایداری محیط, 2015
According to the increasing rate of urbanization in today world, especially in developing countries, the occurrence of each kind of disaster seems to be inevitable.
Hossein Hataminejad   +3 more
doaj  

Phononic band structure engineering for high-Q gigahertz surface acoustic wave resonators on lithium niobate

open access: yes, 2019
Phonons at gigahertz frequencies interact with electrons, photons, and atomic systems in solids, and therefore have extensive applications in signal processing, sensing, and quantum technologies.
Gadalla, M. N.   +12 more
core   +1 more source

Characterization of Macro/Microstructure and Corrosion Resistance of Austenitic Gas Tungsten Arc Welding Cladding

open access: yesAdvanced Engineering Materials, EarlyView.
Cladding is a proven method that boosts the surface qualities of mechanical parts by applying a layer of more durable material over a base substrate. This work responds to the needs of offshore and pressure vessels sectors by focusing on cladding a super austenitic steel onto low‐carbon steel through gas tungsten arc welding.
E. J. da Cruz Junior   +6 more
wiley   +1 more source

See-saw Enhancement of Lepton Mixing

open access: yes, 1993
The see-saw mechanism of neutrino mass generation may enhance lepton mixing up to maximal even if the Dirac mass matrices of leptons have structure similar to that in the quark sector. Two sets of conditions for such an enhancement are found.
A. Acker   +55 more
core   +2 more sources

Impact of Pre‐Oxidation Treatments on a Recycled MgO/Steel‐Composite as Carbon Free Anode in Aluminum‐Electrolysis Environments

open access: yesAdvanced Engineering Materials, EarlyView.
Cermets (60 vol.% AISI 316L stainless steel, 40 vol.% recycled MgO), intended for use in aluminum electrolysis, were pre‐oxidized in three furnaces with different heating technologies and subjected to a cryolite corrosion test. The different atmospheres influenced the formation of oxide layers, which in turn affected corrosion resistance and ...
Patricia Kaiser   +4 more
wiley   +1 more source

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