Results 51 to 60 of about 940,882 (376)
Effect of sedimentation on the final hardness of polymeric particle composites
Research in Agricultural Engineering, 2012 In present days composite materials are the indispensable part of many branches. They make a foray into the branch of agricultural production, where they are getting to intensive development of systems utilized e.g. at soil processing.
P. Valášek, M. Müller, A. Proshlyakov
doaj +1 more source
A new approach to local hardness
, 2011 The applicability of the local hardness as defined by the derivative of the chemical potential with respect to the electron density is undermined by an essential ambiguity arising from this definition. Further, the local quantity defined in this way does
Ayers +85 more
core +1 more source
Hardness and Algorithms for Rainbow Connectivity [PDF]
, 2009 An edge-colored graph G is rainbow connected if any two vertices are connected by a path whose edges have distinct colors. The rainbow connectivity of a connected graph G, denoted rc(G), is the smallest number of colors that are needed in order to make G
Chakraborty, Sourav +3 more
core +4 more sources
Microstructural Evaluation of Inconel 718 and AISI 304L Dissimilar TIG Joints
Metals, 2023 Dissimilar welding joints of Inconel 718 (IN718) nickel superalloy with low-carbon AISI 304L austenitic steel (SS304L) were conducted using the Tungsten Inert Gas (TIG) welding process. The present investigation focuses on the effect of different welding
Dimitra Ioannidou +3 more
doaj +1 more source
Myths about new ultrahard phases: Why materials that are significantly superior to diamond in elastic moduli and hardness are impossible [PDF]
Journal of Applied Physics, 2018 Reports published in the last 25 years on the synthesis of carbon-based materials significantly superior to diamond in hardness and elastic properties have been critically examined, and three groups of recently appearing myths have been analyzed.
V. Brazhkin, V. Solozhenko
semanticscholar +1 more source
Population Ecology, EarlyView.Population size and dynamics fundamentally shape speciation by influencing genetic drift, founder events, and adaptive potential. Small populations may speciate rapidly due to stronger drift, whereas large populations harbor more genetic diversity, which can alter divergence trajectories. We highlight theoretical models that incorporate population size
Ryo Yamaguchi +3 more
wiley +1 more source
Materials, 2019 CAD/CAM (computer-aided design/computer-aided manufacturing) for indirect restorative materials has been recently introduced in dentistry. The purpose of this study was to evaluate the change of the surface micro-hardness of different restorative CAD/CAM
Marco Colombo +4 more
semanticscholar +1 more source
Unifying and Strengthening Hardness for Dynamic Problems via the Online Matrix-Vector Multiplication Conjecture [PDF]
Symposium on the Theory of Computing, 2015 Consider the following Online Boolean Matrix-Vector Multiplication problem: We are given an n x n matrix M and will receive n column-vectors of size n, denoted by v1, ..., vn, one by one.
Monika Henzinger +3 more
semanticscholar +1 more source
Effect of the over-ageing treatment on the mechanical properties of AA2024 aluminum alloy. [PDF]
, 2012 The evolution of the hardness of the over-ageing AA2024 alloy scale was followed by measurements of Vickers hardness. The nanoindentation is adapted to the determination of elastoplastic properties (hardness and Young’s modulus) of the matrix and also of
Abrudeanu, Marioara +6 more
core
Improved Hardness of Approximating Chromatic Number [PDF]
, 2013 We prove that for sufficiently large K, it is NP-hard to color K-colorable graphs with less than 2^{K^{1/3}} colors. This improves the previous result of K versus K^{O(log K)} in Khot [14]
Huang, Sangxia
core +1 more source