Results 1 to 10 of about 454,681 (242)

The Hardness of Coins [PDF]

open access: greenScientific American, 1913
n ...
T. K. Rose
openalex   +4 more sources

HARDNESS AND HARDNESS MEASUREMENT

open access: bronzeJournal of the Society of Mechanical Engineers, 1925
Senji KOKADO
openalex   +4 more sources

Reactive sintering of B4c-TiB2 composites from B4 and TiO2 precursors [PDF]

open access: yesProcessing and Application of Ceramics, 2020
The effect of sintering temperature in the interval from 1775 to 1850°C on the density, microstructure, hardness and fracture toughness of ceramic composites consisting of a boron carbide matrix and titanium diboride secondary phase was studied.
Švec Pavol   +2 more
doaj   +1 more source

High-entropy high-hardness metal carbides discovered by entropy descriptors [PDF]

open access: yesNature Communications, 2018
High-entropy materials have attracted considerable interest due to the combination of useful properties and promising applications. Predicting their formation remains the major hindrance to the discovery of new systems.
P. Sarker   +8 more
semanticscholar   +1 more source

Achieving Competitive Hardness

open access: yesSocial Interaction, 2020
This paper examines institutional touch in the case of institutionalized professional high-class sports where touch constitutes an intrinsic, required, and desired component of the institutional task.
Christian Meyer, Ulrich v. Wedelstaedt
doaj   +1 more source

Hardness and tribological properties of laser irradiated PMMA based nano-microcomposites [PDF]

open access: yesTribology and Materials, 2022
In this work, new composite material is manufactured from poly(methyl methacrylate) PMMA matrix reinforced by glass fibre type E-glass. The effect of volume fraction of fibre and length to diameter ratio is studied, and friction and wear characteristics ...
Hebatalrahman A. Hebatalrahman
doaj   +1 more source

Hard hadronic diffraction is not hard [PDF]

open access: yesInternational Journal of Modern Physics E, 2016
Hadronic diffractive processes characterized by a hard scale (hard diffraction) contain a nontrivial interplay of hard and soft, nonperturbative interactions, which breaks down factorization of short and long distances. On the contrary to the expectations based on the factorization hypothesis, assuming that hard diffraction is a higher twist, these ...
Boris Kopeliovich   +2 more
openaire   +4 more sources

The hardness of conditional independence testing and the generalised covariance measure [PDF]

open access: yesAnnals of Statistics, 2018
It is a common saying that testing for conditional independence, i.e., testing whether whether two random vectors $X$ and $Y$ are independent, given $Z$, is a hard statistical problem if $Z$ is a continuous random variable (or vector).
Rajen Dinesh Shah, J. Peters
semanticscholar   +1 more source

Flexural Strength and Hardness of Filler-Reinforced PMMA Targeted for Denture Base Application

open access: yesMaterials, 2021
The aim of this work was to evaluate the flexural strength and surface hardness of heat-cured Polymethyl methacrylate (PMMA) modified by the addition of ZrO2 nanoparticles, TiO2 nanoparticles, and E-glass fibre at different wt.% concentrations. Specimens
A. Alhotan   +4 more
semanticscholar   +1 more source

Glenohumeral joint capsular tissue tension loading correlates moderately with shear wave elastography: a cadaveric investigation [PDF]

open access: yesUltrasonography, 2020
Purpose The purpose of this study was to investigate changes in the mechanical properties of capsular tissue using shear wave elastography (SWE) and a durometer under various tensile loads, and to explore the reliability and correlation of SWE and ...
Charles W. Nichols   +7 more
doaj   +1 more source

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