Results 91 to 100 of about 378,095 (341)

Self-enhanced diffraction from fixed photorefractive gratings during coherent reconstruction [PDF]

, 1993
We explore, theoretically and experimentally, the effects of self-enhancement (or self-depletion) of the diffraction which occurs during coherent reconstruction from fixed photorefractive gratings.
Kewitsch, Anthony, Rakuljic, George A., Segev, Mordechai, Yariv, Amnon   +3 more
core   +1 more source

Unlocking the Power of Quercetin‐Encapsulated Mesoporous Bioactive Glass Nanoparticles: A Multifunctional Approach to Bone Regeneration

Advanced Engineering Materials, EarlyView.
Mesoporous bioactive glass nanoparticles (MBGNs) are investigated for bone regeneration given their remarkable structural and functional properties. MBGNs are functionalized with Mn and Cu and incorporated with quercetin, a natural flavonoid exhibiting antioxidant, anti‐inflammatory, and antimicrobial properties.
Giovanni Lo Bello, Qaisar Nawaz, Pier Francesco Ferrari, Laura Pastorino, Roberto Raiteri, Aldo R. Boccaccini   +5 more
wiley   +1 more source

High efficiency and low absorption Fresnel compound zone plates for hard X-ray focusing

, 2005
Circular and linear zone plates have been fabricated on the surface of silicon crystals for the energy of 8 keV by electron beam lithography and deep ion plasma etching methods.
Aristov, V., Ishikawa, T., Isoyan, A., Kondratenkov, M., Kuyumchyan, A., Shulakov, E., Snigirev, A., Snigireva, I., Souvorov, A., Tamasaku, K., Trouni, K., Yabashi, M.   +11 more
core   +1 more source

The Structural Refinement of Commercial‐Purity Copper Processed by Equal Channel Angular Pressing with Low Strain Amplitude

Advanced Engineering Materials, EarlyView.
Equal channel angular pressing of commercial pure copper under low strain amplitude (≈0.48) induces concurrent continuous and localized discontinuous dynamic recrystallization, forming a duplex structure influenced by strain heterogeneity and recovery. Moderate hardening after 4–12 passes results from progressive high‐angle grain boundary formation via
Paula Cibely Alves Flausino, Nayara A. N. da Silva, Bárbara C. de Almeida, Taise M. Manhabosco, Elaine C. S. Corrêa, Maria T. P. Aguilar, Paulo R. Cetlin   +6 more
wiley   +1 more source

A Comprehensive Review of Additive Manufacturing for Space Applications: Materials, Advances, Challenges, and Future Directions

Advanced Engineering Materials, EarlyView.
Additive manufacturing (AM) transforms space hardware by enabling lightweight, high‐performance, and on‐demand production. This review outlines AM processes—powder bed fusion (PBF), directed energy deposition (DED), binder jetting (BJ), sheet lamination (SL), and material extrusion (ME)—applied to propulsion, satellite structures, and thermal devices ...
Stelios K. Georgantzinos, Eleni Papadopoulou, Grigorios Kostopoulos, Stefanos Voulgaris, Alexandra Tseni, Panteleimon Bakalis, Maria Gkara, Chara C. Mitropoulou, Nikos D. Lagaros   +8 more
wiley   +1 more source

Dynamics of Fermionic Four-Wave Mixing

, 2002
We study the dynamics of a beam of fermions diffracted off a density grating formed by fermionic atoms in the limit of a large grating. An exact description of the system in terms of particle-hole operators is developed.
A.F. Bernhardt, A.G. Rojo, A.G. Truscott, B. DeMarco, B.W. Shore, C. McKenzie, C. P. Search, C.P. Search, E.A. Donley, F. Schreck, G. Lenz, G. Lenz, G. Roati, H. Christ, I.D. Abella, J. Denschlag, J.M. Vogels, K.E. Strecker, L. Deng, L. Khaykovich, M. Kozuma, M. Kozuma, M.G. Moore, P. Meystre, P. Villain, P.J. Martin, R. Wynar, S. Burger, S. Inouye, S. Inouye, W. Ketterle, Y. Torii, Z. Hadzibabic   +32 more
core   +1 more source

Considering Grayscale Process and Material Properties for Robust Multilevel Diffractive Flat Optics

Photonics
Arbitrarily designed flat optics directly manipulate the light wavefront to reproduce complex optical functions, enabling more compact optical assemblies and microsystem integration.
Diogo E. Aguiam, Ana Dias, Manuel J. L. F. Rodrigues, Aamod Shanker, Filipe Camarneiro, Joana D. Santos, Pablo Valentim, Joao Cunha, Patrícia C. Sousa   +8 more
doaj   +1 more source

Toward Maximum Utilization of Heavy Rare Earths in Sintered Nd–Fe–B Magnets by Grain Boundary Diffusion Source and Application Area Optimization

Advanced Engineering Materials, EarlyView.
In this work, the grain boundary diffusion process is optimized to maximize heavy rare earth utilization by strategic magnetic hardening of areas in the magnet such as corners or edges that are highly susceptible to demagnetization, as demonstrated by finite element magnetostatics simulation on an internal permanent magnet, synchronous traction motor ...
Abdullatif Durgun, Dominik Ohmer, Matthias Katter, Andreas Thul, Simon Steentjes, Hossein Sepehri Amin, Oliver Gutfleisch, Imants Dirba   +7 more
wiley   +1 more source

Design and fabrication of a two dimentional grating light valve using temperature dependence of the refractive index of liquids [PDF]

, 2008
Design and fabrication of a two dimensional tuneable grating has been proposed. A transmissive 2D square well grating is fabricated. The holes of the grating then is filled with a liquid which it’s refractive index is depend on the temperature.
Latifi, Hamid, Madani, Abbas, Riahi, Mohammadreza   +2 more
core  

Design of Multiphase Compositionally Complex Alloys for Enhanced Hardness at Elevated Temperatures and Machinability: Comparative Study with Inconel 718

Advanced Engineering Materials, EarlyView.
This study compares the mechanical properties of Inconel 718 with two newly developed compositionally complex alloys (CCAs). Inco‐like‐H alloy demonstrates significantly improved wear resistance, surface finish, and hardness, notably at high temperatures. This CCA requires no heat treatment and is well suited for additive manufacturing. Its performance
Laurent Peltier, Gaël Le Coz, Fodil Meraghni, Jérome Slowensky   +3 more
wiley   +1 more source