Results 121 to 130 of about 1,327,280 (358)

Carbon Fiber Reinforced Thermoplastics: From Materials to Manufacturing and Applications

open access: yesAdvanced Materials, EarlyView.
A contemporary and critical review on carbon fiber reinforced thermoplastics. The common thermoplastic and carbon fiber applied in the manufacture of carbon fiber reinforced thermoplastics are summarized, and the processing and postprocessing methods are reviewed, with emphasis on state‐of‐the‐art welding techniques.
Howard (Hao) Wang   +6 more
wiley   +1 more source

EVOLUTION OF A STRING NETWORK IN BACKGROUNDS WITH ROLLING HORIZONS [PDF]

open access: yes, 1995
We discuss the temporal variation of the equation of state of a classical string network, evolving in a background in which the Hubble radius 1/H shrinks to a minimum and then re-expands to infinity.
Gasperini, M.   +3 more
core   +1 more source

A critical look at strings

open access: yes, 2011
This is an invited contribution to the Special Issue of "Foundations of Physics" titled "Forty Years Of String Theory: Reflecting On the Foundations". I have been asked to assess string theory as an outsider, and to compare it with the theory, methods ...
A.H. Chamseddine   +7 more
core   +1 more source

Superior Adhesion of Monolayer Amorphous Carbon to Copper

open access: yesAdvanced Materials, EarlyView.
The adhesion energy of monolayer amorphous carbon on copper substrate is 85 J m−2, 13 times higher than that of graphene due to covalent‐like bonding between the sp2 carbon structure to copper. X‐ray photoelectron spectroscopy (XPS), near‐edge X‐ray absorption (NEXAFS), and (density functional theory) DFT calculations are used to elucidate the ...
Hongji Zhang   +27 more
wiley   +1 more source

The Spatial String Tension in the Deconfined Phase of SU(N) Gauge Theory and Gauge/String Duality

open access: yes, 2007
The spatial string tension of a SU(N) gauge theory without quarks is calculated using gauge/string duality for 1 ...
Agasian   +20 more
core   +1 more source

Physical effects of massless cosmic strings [PDF]

open access: yesPhysical Review D, 2017
We study massless cosmic strings which are one-dimensional objects moving with the speed of light. Perturbations of velocities of test bodies and anisotropy of cosmic microwave background generated by massless cosmic strings are analysed. These phenomena are analogous to the string wake effect and the Kaiser-Stebbins effect for standard (massive ...
openaire   +3 more sources

Advanced Electrode Materials for Efficient Hydrogen Production in Protonic Ceramic Electrolysis Cells

open access: yesAdvanced Materials, EarlyView.
Protonic ceramic electrolysis cells (PCECs) are a promising intermediate‐temperature hydrogen production technology, leveraging high proton conductivity in electrolytes yet constrained by insufficient catalytic activity and interfacial instability in fuel/air electrodes. This review systematically categorizes advanced electrode materials and critically
Zhipeng Liu   +6 more
wiley   +1 more source

String and M-theory: answering the critics

open access: yes, 2011
Using as a springboard a three-way debate between theoretical physicist Lee Smolin, philosopher of science Nancy Cartwright and myself, I address in layman's terms the issues of why we need a unified theory of the fundamental interactions and why, in my ...
A. Garrett Lisi   +11 more
core   +1 more source

AI‐Enhanced Gait Analysis Insole with Self‐Powered Triboelectric Sensors for Flatfoot Condition Detection

open access: yesAdvanced Materials Technologies, Volume 10, Issue 6, March 18, 2025.
The given research presents an innovative insole‐based device employing self‐powered triboelectric nanogenerators (TENG) for flatfoot detection. By integrating TENG tactile sensors within an insole, the device converts mechanical energy from foot movements to electrical signals analyzed via machine learning, achieving an 82% accuracy rate in flatfoot ...
Moldir Issabek   +7 more
wiley   +1 more source

Propagators, BCFW recursion and new scattering equations at one loop

open access: yesJournal of High Energy Physics, 2020
We investigate how loop-level propagators arise from tree level via a forward-limit procedure in two modern approaches to scattering amplitudes, namely the BCFW recursion relations and the scattering equations formalism.
Joseph A. Farrow   +4 more
doaj   +1 more source

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