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Materials research innovations (Print), 2020
In this paper, the hardness and wear properties of pure ceramic particles like silicon carbide, boron carbide and graphite are considered in micron size with the reinforced aluminium LM30 metal matrix composites. The stir casting setup is used to prepare
T. Sathish +2 more
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In this paper, the hardness and wear properties of pure ceramic particles like silicon carbide, boron carbide and graphite are considered in micron size with the reinforced aluminium LM30 metal matrix composites. The stir casting setup is used to prepare
T. Sathish +2 more
semanticscholar +1 more source
New England Journal of Medicine, 2021
Hard to Swallow A previously healthy 20-year-old college student presented before the Covid-19 pandemic with a 3-day history of throat pain, malaise, cough, and chills.
Mary W Montgomery +4 more
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Hard to Swallow A previously healthy 20-year-old college student presented before the Covid-19 pandemic with a 3-day history of throat pain, malaise, cough, and chills.
Mary W Montgomery +4 more
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, 2004
The method we introduced in 1992 for measuring hardness and elastic modulus by instrumented indentation techniques has widely been adopted and used in the characterization of small-scale mechanical behavior. Since its original development, the method has
W. Oliver, G. Pharr
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The method we introduced in 1992 for measuring hardness and elastic modulus by instrumented indentation techniques has widely been adopted and used in the characterization of small-scale mechanical behavior. Since its original development, the method has
W. Oliver, G. Pharr
semanticscholar +1 more source
Absolute hardness: companion parameter to absolute electronegativity
, 1983For neutral and charged species, atomic and molecular, a property called absolute hardness eta is defined. Let E(N) be a ground-state electronic energy as a function of the number of electrons N. As is well-known, the derivative of E(N) with respect to N,
R. Parr, R. Pearson
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SSRN Electronic Journal, 2011 We show that the stock market downturns of 2000–2002 and 2007–2009 have very different proximate causes. The early 2000s saw a large increase in the discount rates applied to profits by rational investors, while the late 2000s saw a decrease in rational expectations of future profits.
Campbell, John Y. +2 more
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A model of hardness and fracture toughness of solids
Journal of Applied Physics, 2019Hardness and fracture toughness are some of the most important mechanical properties. Here, we propose a simple model that uses only the elastic properties to calculate the hardness and fracture toughness. Its accuracy is checked by comparison with other
E. Mazhnik, A. Oganov
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Absolute Electronegativity and Hardness: Application to Inorganic Chemistry
, 1988The recent concepts of absolute electronegativity, {chi}, and absolute hardness, {eta}, are briefly reviewed. Experimental values for a large number of molecules and radicals are presented.
R. Pearson
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The Hardness of Hard Treatment [PDF]
, 1998 Abstract In February, 1996, Rosemary West was convicted of ten murders of young women, including a daughter and stepdaughter. The British public were shocked by the gruesome details as they gradually unfolded. West (whose co-defendant husband committed suicide in custody) was sentenced to life imprisonment on each count.
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Proceedings. Thirteenth Annual IEEE Conference on Computational Complexity (Formerly: Structure in Complexity Theory Conference) (Cat. No.98CB36247), 2000
We study the set of incompressible strings for various resource bounded versions of Kolmogorov complexity. The resource bounded versions of Kolmogorov complexity we study are polynomial time CD complexity defined by Sipser, the nondeterministic variant CND due to Buhrman and Fortnow, and the polynomial space bounded Kolmogorov complexity CS introduced ...
Leen Torenvliet, Harry Buhrman
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We study the set of incompressible strings for various resource bounded versions of Kolmogorov complexity. The resource bounded versions of Kolmogorov complexity we study are polynomial time CD complexity defined by Sipser, the nondeterministic variant CND due to Buhrman and Fortnow, and the polynomial space bounded Kolmogorov complexity CS introduced ...
Leen Torenvliet, Harry Buhrman
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Hard facts for hard science [PDF]
Physics World, 1998 Here are two related problems. First, the number of applicants to UK university courses in the physical sciences has fallen by 26% over the last three years. Second, there is an increasing tide of opinion – not only among opinion-formers, but also among those who set research priorities – that the future of physics in the 21st century lies in its role ...
John Hassard, Colling, Dick Learner
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