Results 71 to 80 of about 5,168,827 (263)

Electromagnetic field and short-range wake function in a beam pipe of elliptical cross section

open access: yesPhysical Review Special Topics. Accelerators and Beams, 2008
Within the ultrarelativistic limit, analytical expressions are found for the high-frequency resistive-wall coupling impedance of an elliptical cross-section vacuum chamber.
A. Lutman, R. Vescovo, P. Craievich
doaj   +1 more source

Wally and the Major [picture] : at cross purposes /

open access: yes, 1969
Part of the Stan Cross Archive of cartoons and drawings, 1912-1974.; Inscription: "Stan Cross 9/80"--In ink, lower right. "8953 Tue Apr 8. At Cross Purposes"--In ink, right margin; "8953"--In pencil, upper right corner.; Also available in an electronic ...
Cross, Stan, 1888-1977.
core  

Thermodynamic Pathways of Nonequilibrium Solidification in Wire‐Arc Additive Manufacturing Fe‐Based Multicomponent Alloy Structures

open access: yesAdvanced Engineering Materials, EarlyView.
Geometry‐driven thermal behavior in wire‐arc additive manufacturing (WAAM) influences microstructural evolution during nonequilibrium solidification of a chemically complex Fe–Cr–Nb–W–Mo–C nanocomposite system. By comparing different deposits configurations, distinct entropy–cooling rate correlations, segregation, and carbide evolution are revealed ...
Blanca Palacios   +5 more
wiley   +1 more source

Thermomechanical Fatigue and Creep–Fatigue Interaction of Inconel 718 Additively Manufactured by Laser Beam Powder Bed Fusion

open access: yesAdvanced Engineering Materials, EarlyView.
Thermomechanical fatigue tests of laser beam powder bed fusion (PBF‐LB) Inconel 718 show that the additively manufactured material reaches almost the lifetimes of conventionally‐rolled material under no‐dwell conditions. Introducing dwell times at the maximum temperature markedly reduces the lifetimes due to pronounced grain boundary sliding associated
Stefan Guth   +6 more
wiley   +1 more source

Air‐Pressure–Actuated Vibroacoustic Metamaterial With Tunable Bandgap: Design, Modeling, and Characterization

open access: yesAdvanced Engineering Materials, EarlyView.
This article presents the design, modeling, and characterization of air‐pressure–actuated programmable vibroacoustic metamaterials (PVAMM). The study focuses on leveraging air pressure to dynamically tune resonance frequencies for effective noise attenuation.
William Kaal   +2 more
wiley   +1 more source

A Simplified Laminar Flow Model for the Pultrusion of Glass Fiber/Polyethylene Terephthalate Commingled Yarns

open access: yesAdvanced Engineering Materials, EarlyView.
A simplified thermoplastic pultrusion model is developed to predict thermal fields in glass fiber/polyethylene terephthalate (GF/PET) composites with reduced computational cost. By combining effective material homogenization, validation against literature data, and Gaussian‐process‐based optimization, the study reveals how heating limits, pulling speed,
Elder Soares   +3 more
wiley   +1 more source

Jessie Cross on park bench, ca. 1924 [picture] /

open access: yes, 1924
Part of the Stan Cross Archive of cartoons and drawings, 1912-1974.; Inscription: "Jessie Cross taken 1915"--In ink on verso.; Title devised by cataloguer.; Also available in an electronic version via the internet at: http://nla.gov.au/nla.pic ...
Cross, Stan, 1888-1977.
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Current Status and Challenges in Data Collection for Aerospace Coatings Deposited by Plasma Spraying

open access: yesAdvanced Engineering Materials, EarlyView.
An innovative approach has been integrated into the GRENAT project to optimize plasma spraying and coating performance. Raw materials are accelerated and melted in the plasma generated by torches, creating coatings. Monitoring sensors collect process data which are combined with ex situ characterization data.
Lila Randriamananjara   +8 more
wiley   +1 more source

Radial Corrugations of Multi-Walled Carbon Nanotubes Driven by Inter-Wall Nonbonding Interactions

open access: yesNanoscale Research Letters, 2011
We perform large-scale quasi-continuum simulations to determine the stable cross-sectional configurations of free-standing multi-walled carbon nanotubes (MWCNTs). We show that at an inter-wall spacing larger than the equilibrium distance set by the inter-
Huang Xu, Liang Wentao, Zhang Sulin
doaj  

Things that make Stan cross [picture] : what makes inflation? /

open access: yes, 1900
Part of the Stan Cross Archive of cartoons and drawings, 1912-1974.; Inscription: "Stan Cross"--In ink, lower right. "Page 5"--In ink, on note attached to verso.; Title devised by cataloguer.; Also available in an electronic version via the internet at ...
Cross, Stan, 1888-1977.
core  

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