Results 81 to 90 of about 148,775 (300)

Role of femtosecond prestructure of intense harmonic pulses in relativistic laser-solid interactions

Physical Review Research
Extreme intensity contrast is essential for ultraintense, femtosecond laser excitation of solids, in particular for studies with structured or ultrathin targets.
C. Aparajit, Anandam Choudhary, Ankit Dulat, Mickael Grech, Samuel Marini, Amit D. Lad, Yash M. Ved, Michèle Raynaud, Caterina Riconda, G. Ravindra Kumar   +9 more
doaj   +1 more source

Brushless Wound-Field Synchronous Machine Topology with Excellent Rotor Flux Regulation Freedom

Machines
This paper presents a nine-switch inverter for brushless operation of wound-field synchronous machines with excellent rotor flux regulation freedom. The manufacturing cost of permanent magnet machines is high due to the instability of rare-earth magnet ...
Muhammad Ayub, Arsalan Arif, Atiq Ur Rehman, Azka Nadeem, Ghulam Jawad Sirewal, Mohamed A. Abido, Mudassir Raza Siddiqi   +6 more
doaj   +1 more source

Surface-enhanced optical third-harmonic generation in Ag island films

, 2005
Surface-enhanced optical third-harmonic generation (THG) is observed in silver island films. The THG intensity from Ag nanoparticles is enhanced by more than two orders of magnitude with respect to the THG intensity from a smooth and homogeneous silver ...
A. A. Nikulin, E. M. Kim, G. Marowsky, M. A. Bader, O. A. Aktsipetrov, S. S. Elovikov, T. V. Murzina, V. I. Emelyanov   +7 more
core   +1 more source

A Bespoke Programmable Interpenetrating Elastomer Network Composite Laryngeal Stent for Expedited Paediatric Laryngotracheal Reconstruction

Advanced Functional Materials, EarlyView.
A programmable interpenetrating double‐network architecture, created via 3D‐TIPS printing and resin infusion, synergistically combines thermoplastic and thermosetting elastomers to balance structural rigidity and surface softness—crucial for paediatric laryngeal stents.
Elizabeth F. Maughan, Lei Wu, Dong Zhang, Linxiao Wu, Graca Ferreira Vaz Pinto Mendes, Wanqiao J. Tu, Heping Ma, Toby J. Proctor, Colin R. Butler, Thomas Kjærgaard, Mark W. Lowdell, Martin A. Birchall, Robert E. Hynds, Richard Hewitt, Wenhui Song   +14 more
wiley   +1 more source

A review of resonance response in large horizontal-axis wind turbines [PDF]

, 1981
Field operation of the Mod-0 and Mod-1 wind turbines is described. Operational experience shows that 1 per rev excitation exists in the drive train, high aerodynamic damping prevents resonance response of the blade flatwise modes, and teetering the hub ...
Sullivan, T. L.
core   +1 more source

Surface Plasmon Excitation of Second Harmonic light: Emission and Absorption

, 2017
We aim to clarify the role that absorption plays in nonlinear optical processes in a variety of metallic nanostructures and show how it relates to emission and conversion efficiency. We define a figure of merit that establishes the structure's ability to
De Angelis, Costantino, de Ceglia, Domenico, Scalora, Michael, Vincenti, Maria A.   +3 more
core   +1 more source

Harmonizing the Pyrene and Ether Groups in Covalent Triazine Polymers for Highly Effective H2O2 Photosynthesis via One‐Step Two‐Electron Oxygen Reduction

Advanced Functional Materials, EarlyView.
The pyrene and ether groups are incorporated into the covalent triazine polymer (CTP) structure. The synergistic effect of the two functional groups endows CTP with better electron transfer, light absorption, and oxygen activation properties. An impressive apparent quantum yield (13.2% @420 nm) and a remarkable solar‐to‐chemical conversion efficiency ...
Chong Wang, Jinliang Lv, Yichun Lu, Hanfeng Ye, Xuan Zhang, Leonardo Cancellara, Nadezda Tarakina, Jiande Lin, Xin Gao, Oleksandr Savateev, Jiajia Cheng   +10 more
wiley   +1 more source

A study of the effect of motor structural components on harmonic noise

Scientific Reports
This paper introduces the characteristics of the harmonic noise of the outdoor unit of air conditioner, analyzes the change of the noise sound pressure level and the corresponding spectral characteristics of the outdoor unit when the harmonic noise is ...
Weijie Zhang, Hao Li
doaj   +1 more source

Controlled Generation of Nonlinear Resonances through Sinusoidal Lattice Modes in Bose-Einstein Condensate

, 2015
We study Bose-Einstein condensate in the combined presence of time modulated optical lattice and harmonic trap in the mean-field approach. Through the self-similar method, we show the existence of sinusoidal lattice modes in this inhomogeneous system ...
Das, Priyam, Panigrahi, Prasanta K.
core   +1 more source

Growth of Millimeter‐Sized BaTaO2N Single Crystals by an NH3‐Assisted BaCl2 Flux Method

Advanced Functional Materials, EarlyView.
Millimeter‐sized BaTaO2N single crystals are successfully grown from a BaCl2 flux under NH3 flow. Their comprehensive characterization, including dielectric properties, is demonstrated, and the possible growth mechanisms are discussed. Abstract Perovskite‐type oxynitrides have attracted considerable attention due to their excellent photocatalytic ...
Ginji Harada, Mirabbos Hojamberdiev, Hajime Wagata   +2 more
wiley   +1 more source