Results 101 to 110 of about 4,690,414 (330)

Robust Spot Melting by 3D Spot Arrangements in Electron Beam Powder Bed Fusion

Advanced Engineering Materials, EarlyView.
This work proposes an approach to replace separately melted contours for spot melting in electron beam powder fusion. Adapting the spot arrangements close to the contour combined with stacking yields a comparable surface quality without the inherent challenges of separate contours, as demonstrated, by electron optical images and roughness measurements.
Tobias Kupfer, Lukas Spano, Sebastian Pohl, Carolin Körner, Matthias Markl   +4 more
wiley   +1 more source

Regular Oscillation Sub-spectrum of Rapidly Rotating Stars

, 2012
We present an asymptotic theory that describes regular frequency spacings of pressure modes in rapidly rotating stars. We use an asymptotic method based on an approximate solution of the pressure wave equation constructed from a stable periodic solution ...
B. Georgeot, Berry, Blümel, Bohigas, D. R. Reese, F. Lignières, García Hernández, Koch, Kogelnik, Lignières, Lignières, Lignières, Lignières, M. Pasek, Mantegazza, Miller, Monnier, Pasek, Percival, Reese, Reese, Reese, Reese, Schomerus, Tassoul, Tureci, Vagov, Vandakurov, Zalipaev   +28 more
core   +3 more sources

Copper Nanocrystallization in Anodic Oxide Films of Ti–Cu‐Based Bulk Metallic Glass and Its Effect on the Corrosion Resistance and Cytocompatibility

Advanced Engineering Materials, EarlyView.
Viktoriia Shtefan, Thorgund Nemec, Ute Hempel, Annett Gebert and coworkers demonstrate that anodic treatment of Ti–Cu‐based metallic glass in a nontoxic pyrophosphate electrolyte forms a protective bilayered Ti/Zr‐oxide film enriched with Cu nanocrystals.
Viktoriia Shtefan, Nora Fernández Navas, Thorgund Nemec, Ivan Kaban, Ute Hempel, Andrea Voss, Volker Hoffmann, Darius Pohl, Annett Gebert   +8 more
wiley   +1 more source

Numerical Investigation of Water Wave Impacting a Structure Using Fluid–Structure Interaction Simulation

Modelling
Unmanned surface vehicles (USVs) have great application prospects in defense, environmental surveillance and offshore energy due to their cost-effectiveness and long-duration mission ability.
Yifei Peng, Jean-Marie Nianga, Zefeng Wang, Yunliang Jiang   +3 more
doaj   +1 more source

Laboratory Investigation on Hydrodynamic Performance of an Innovative Aeration Device with a Wave-Driven Heaving Buoy

Energies, 2018
Coastal seawater quality is of significance for the environment, ecology and fisheries. In recent years, the hypoxia or anoxia problems of bottom seawater aggravated due mainly to the seawater stratification and eutrophication.
Zegao Yin, Yanxu Wang, Yong Liu, Chengyan Gao, Huan Zhang   +4 more
doaj   +1 more source

Encyclopedia of 2D β′‐In2Se3 Growth Using Chemical Vapor Deposition: The Effects of Synthesis Parameters Onto Material Quality

Advanced Engineering Materials, EarlyView.
A distinct semi‐confined inner‐tube chemical vapor deposition geometry enables reproducible, large‐area growth of phase‐pure 2D β′‐In2Se3 from InI + Se precursors. Engineering local vapor transport and optimizing precursor delivery and temperature–time conditions yield uniform continuous films.
Dasun P. W. Guruge, P. Sanju S. Panawala, Joseph F. S. Fernando, Zhenhuan Chen, Chao Zhang, Dong‐Chen Qi, Liangzhi Kou, Konstantin L. Firestein, Dmitri V. Golberg   +8 more
wiley   +1 more source

Quantized charge pumping through a quantum dot by surface acoustic waves

, 2003
We present a realization of quantized charge pumping. A lateral quantum dot is defined by metallic split gates in a GaAs/AlGaAs heterostructure. A surface acoustic wave whose wavelength is twice the dot length is used to pump single electrons through the
Ahlers, F. J., Beere, H. E., Ebbecke, J., Fletcher, N. E., Janssen, T. J. B. M., Pepper, M., Ritchie, D. A.   +6 more
core   +1 more source

Dual‐Mode Film Based on Highly Scattering Nanofibers and Upcycled Chips‐Bags for Year‐Round Thermal Management

Advanced Functional Materials, EarlyView.
Intelligent radiative cooling devices, adaptable to various weather conditions, have the potential for year‐round energy savings. This study introduces a sustainable dual‐mode film made from polycaprolactone nanofibers and upcycled chip bags for effective thermal management.
Qimeng Song, Stefan Rettinger, Chengzhang Xu, Ulrich Mansfeld, Markus Retsch   +4 more
wiley   +1 more source

Influence of Porous Column-Type Breakwater on the Regular Wave Hydrodynamic Characteristics of Uneven Reefs

Redai dili
Coral reefs, which are among the oldest and most biodiverse ocean ecosystems, play irreplaceable roles in sustaining global fishery resources and protecting coastal areas and biological habitats.
Yewenya Liu, Ke Qu, Chao Wang, Wei Li, Wei Zheng   +4 more
doaj   +1 more source

A mathematical model for Tsunami generation using a conservative velocity-pressure hyperbolic system

, 2008
By using the Hugoniot curve in detonics as a Riemann invariant of a velocity-pressure model, we get a conservative hyperbolic system similar to the Euler equations. The only differences are the larger value of the adiabatic constant (= 8.678 instead of 1.
Roux, Alain-Yves Le
core   +1 more source