Results 131 to 140 of about 2,320,372 (311)

Microstructure, Thermal Transport, and Dry‐Sliding Tribology of Powder‐Metallurgy Al7075 Composites Reinforced With Sol–Gel‐Derived ZnO–rGO Hybrid Nanoparticles

open access: yesAdvanced Engineering Materials, EarlyView.
Sol–gel‐derived ZnO–rGO hybrid nanoparticles enable Al7075 powder‐metallurgy composites to achieve concurrent gains in hardness and thermal conductivity while markedly lowering friction and wear. The hybrid architecture couples ZnO‐based load support with rGO‐assisted lamellar sliding and heat spreading, revealing a promising route toward lightweight ...
Bunyamin Aksakal   +3 more
wiley   +1 more source

On Weak Probabilistic φ-Contractions in Menger Probabilistic Metric Spaces

open access: yesAxioms
Two new concepts are introduced in this paper: ZH-set and weak probabilistic φ-contraction. Firstly, a fixed-point theorem for weak probabilistic φ-contraction is given in Menger probabilistic metric spaces, which generalizes and unifies several results ...
Dingwei Zheng, Qingming He
doaj   +1 more source

Dose-dependent effects of BTS on muscle contraction in zebrafish embryos.

open access: yes, 2013
Zebrafish embryos were incubated with BTS at different concentrations (0.16 µM, 0.8µM, 4 µM, 20 µM, 100 µM). The BTS treatment started at the 6 somite stage (12 hpf) and continued for 30 hours.
Junling Li (368249)   +4 more
core   +1 more source

Defect Evolution and Mechanical Performance of Fused Filament Fabrication‐Manufactured 17‐4PH Stainless Steel Revealed by X‐Ray Computed Tomography

open access: yesAdvanced Engineering Materials, EarlyView.
X‐ray computed tomography reveals how process‐induced defects evolve from green to sintered states in Fused Filament Fabrication (FFF)‐manufactured 17‐4PH stainless steel. Internal porosity, weakest cross‐sections, and fracture locations show strong correlation with tensile performance, demonstrating the potential of computed tomography (CT)‐based ...
György Ledniczky   +3 more
wiley   +1 more source

Interpolative Geraghty-Type Contractions in Bicomplex-Valued Metric Spaces: Fixed Point Results, Stability Analysis, and Applications

open access: yesAppliedMath
In this paper, we introduce and systematically study the class of interpolative Geraghty-type contractive mappings within the framework of complete bicomplex-valued metric spaces (bi-CVMS).
Rakhal Das, Satyendra Narayan
doaj   +1 more source

Pointwise Contraction Criteria for the Existence of Fixed Points

open access: yes, 1978
We show that, in a complete metric space, every selfmap that is a “weak directional contraction” admits a fixed point.
Frank H. Clarke
core   +1 more source

Stretching the Printability Metric in Direct‐Ink Writing with Highly Extensible Yield‐Stress Fluids

open access: yesAdvanced Functional Materials, EarlyView.
This study introduces “drawability” as a new metric for assessing printability in direct‐ink writing, focusing on gap‐spanning performance and speed robustness. By designing yield‐stress fluids with high extensibility, we demonstrate that extensional strain‐to‐break significantly enhances printability.
Chaimongkol Saengow   +9 more
wiley   +1 more source

Simulation functions on metric fixed point theory

open access: yesJournal of Inequalities and Applications
This paper aims to generalize the primary result of Khojasteh et al. by introducing and expanding the concept of simulation functions and weak ζ-contractions under weaker conditions.
Hamid Mottaghi Golshan
doaj   +1 more source

Best Proximity point for Z-contraction and Suzuki type Z-contraction mappings with an application to fractional calculus

open access: yes, 2016
In this article, we introduced the best proximity point theorems for $\mathcal{Z}$-contraction and Suzuki type $\mathcal{Z}$-contraction in the setting of complete metric spaces. Also by the help of weak $P$-property and $P$-property, we proved existence
Dhananjay Gopal   +5 more
core   +1 more source

Polarizable Vanadium Dipoles Promote Water Dissociation on Vanadium‐Based Metal Organic Framework

open access: yesAdvanced Functional Materials, EarlyView.
The polarization of unpaired V 3d electrons weakens the H─O bond to improve water dissociation by the dual Vδ+:O─H and Pλ−:H─O coupling hydrogen bonds formation and relaxation. P@V‐MOF electrocatalyst shows low overpotentials (94 mV in acid, 178 mV in neutral, and 77 mV in alkaline solutions) with excellent stability for effective overall water ...
Xinjuan Liu   +13 more
wiley   +1 more source

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