Results 81 to 90 of about 435,363 (293)

PSR J1909-3744, a Binary Millisecond Pulsar with a Very Small Duty Cycle

, 2003
We report the discovery of PSR J1909-3744, a 2.95 millisecond pulsar in a nearly circular 1.53 day orbit. Its narrow pulse width of 43 microseconds allows pulse arrival times to be determined with great accuracy.
A. Hotan, B. A. Jacoby, Driebe T., M. Bailes, M. H. van Kerkwijk, S. B. Anderson, S. Ord, S. R. Kulkarni, Shklovskii I. S.   +8 more
core   +2 more sources

Poynting vector, energy density and energy velocity in anomalous dispersion medium [PDF]

, 2001
The Poynting vector, energy density and energy velocity of light pulses propagating in anomalous dispersion medium (used in WKD-like experiments) are calculated.
A. Dogariu, A. Sommerfeld, Chao-Guang Huang, G. Diener, G. Diener, L.J. Wang, R.Y. Chiao, X.-J. Zhou, Y.Z. Zhang, Yuan-Zhong Zhang   +9 more
core   +3 more sources

Characterization of Nitinol Produced by Laser Powder Bed Fusion for Mechanical Metamaterial Applications

Advanced Engineering Materials, EarlyView.
Stabilization of L‐PBF Ni50.7Ti49.3 under low‐cycle loading was investigated. Recoverable strain after cycling was dependent on the amount of applied load. Recovery ratio was 53.4% and 35.1% at intermediate and high load, respectively. The maximum total strain reached 10.3% at a high load of 1200 MPa.
Ondřej Červinek, Jakub Hurník, Miroslav Šmíd, Ondřej Zobač, Melanie Todt, Daniel Koutný   +5 more
wiley   +1 more source

Reduction of Oxide Inclusions During the High‐Frequency Welding of Steel via a Nonthermal Ar/H2 Plasma Jet

Advanced Engineering Materials, EarlyView.
High‐frequency (HF) welding of steel is limited by oxide inclusions that degrade weld quality. This study demonstrates, for the first time, the integration of a nonthermal Ar/H2 dielectric barrier discharge (DBD) plasma jet into HF welding. Local plasma treatment provides effective shielding and in‐situ oxide reduction, resulting in markedly fewer and ...
Viktor Udachin, Lienhard Wegewitz, René Gustus, Henning Wiche, Wolfgang Maus‐Friedrichs   +4 more
wiley   +1 more source

Association between increased arterial stiffness and clinical outcomes in patients with early sepsis: a prospective observational cohort study

Intensive Care Medicine Experimental, 2019
Background Conduit arteries, especially the aorta, play a major role in ensuring efficient cardiac function and optimal microvascular flow due to their viscoelastic properties.
Sigita Kazune, Andris Grabovskis, Corrado Cescon, Eva Strike, Indulis Vanags   +4 more
doaj   +1 more source

Forward Raman compression via photonic band gap in metals or warm dense matter

, 2010
The group velocity of a light pulse in photonic band gap material could considerably deviate from the speed of light in vacuum. Different speeds of a forward stoke and a pump pulse would enable the Raman compression in metals or the warm dense matter.
Moon, Sung Joon, Son, S.
core   +1 more source

Tunneling-assisted impact ionization fronts in semiconductors [PDF]

, 2001
We propose a novel type of ionization front in layered semiconductor structures. The propagation is due to the interplay of band-to-band tunneling and impact ionization.
Alferov Zh. I., D’yakonov M. I., D’yakonov M. I., Grekhov I. V., Grekhov I. V., Igor Grekhov, Konstantinov O. V., Kozlov V. A., Kuz’min V. A., Minarsky A., Minarsky A., Mnatsakanov T. I., Pavel Rodin, Ute Ebert, Vainshtein S. N., Vainshtein S. N., Vainshtein S. N., Verwer J. G., Willem Hundsdorfer   +18 more
core   +4 more sources

Effect of Laser Deoxidation on Adhesive‐Bonded Aluminum in an Oxygen‐Free Atmosphere

Advanced Engineering Materials, EarlyView.
This study investigates laser ablation of aluminum under oxygen‐free conditions. The goal is to produce oxide‐free substrates that enable improved adhesive bonding with epoxy. Optimized laser parameters (90% overlap, 300 µJ) combined with oxide‐free substrates result in the highest tensile strength of the adhesive bond.
Sandra Gerland, Finn‐Lennard Janthur, Sarah Seffer, Jörg Hermsdorf, Ludger Overmeyer, Annika Raatz   +5 more
wiley   +1 more source

A Velocity Dealiasing Algorithm on Frequency Diversity Pulse-Pair for Future Geostationary Spaceborne Doppler Weather Radar

Atmosphere, 2018
Velocity ambiguity is one of the main challenges in accurately measuring velocity for the future Geostationary Spaceborne Doppler Weather Radar (GSDWR) due to its short wavelength.
Xuehua Li, Chuanzhi Wang, Zhengxia Qin, Jianxin He, Fang Liu, Qing Sun   +5 more
doaj   +1 more source

Ultra-short pulse compression using photonic crystal fibre [PDF]

, 2004
A short section of photonic crystal fibre has been used for ultra-short pulse compression. The unique optical properties of this novel medium in terms of high non-linearity and relatively small group velocity dispersion are shown to provide an ideal ...
McConnell, G., Riis, E.
core   +1 more source