Conventional Vickers and true instrumented indentation hardness determined by instrumented indentation tests [PDF]
, 2010 We evaluate Vickers hardness and true instrumented indentation test (IIT) hardness of 24 metals over a wide range of mechanical properties using just IIT parameters by taking into account the real contact morphology beneath the Vickers indenter ...
Bulychev +6 more
core +1 more source
Hardness of approximate nearest neighbor search [PDF]
Symposium on the Theory of Computing, 2018 We prove conditional near-quadratic running time lower bounds for approximate Bichromatic Closest Pair with Euclidean, Manhattan, Hamming, or edit distance.
A. Rubinstein
semanticscholar +1 more source
The effect of multiple enamel conditioning on enamel micro-hardness
Dental Research Journal, 2022 Background: White spot formation is one of the common side effects in orthodontic treatments and multiple enamel conditioning might happen even during on session of fixed orthodontic treatments.
Parisa Salehi +3 more
doaj +1 more source
Experimental Study on the Melting Temperature, Microstructural and Improved Mechanical Properties of Sn58Bi/Cu Solder Alloy Reinforced with 1%, 2% and 3% Zirconia (ZrO2) Nanoparticles [PDF]
Archives of Metallurgy and Materials, 2021 This paper investigates the influence of 1%, 2% and 3% zirconia (ZrO2) nanoparticles to the melting, microstructural and mechanical properties of the Sn58Bi solder. Melting temperatures of 145.11°C, 140.89°C and 143.84°C were attained correspondingly for
S. Amares, R. Durairaj, S.H. Kuan
doaj +1 more source
Proof verification and hardness of approximation problems
Proceedings., 33rd Annual Symposium on Foundations of Computer Science, 1992 The class PCP(f(n),g(n)) consists of all languages L for which there exists a polynomial-time probabilistic oracle machine that used O(f(n)) random bits, queries O(g(n)) bits of its oracle and behaves as follows: If x in L then there exists an oracle y ...
Sanjeev Arora +4 more
semanticscholar +1 more source
Enhanced Hardness in High‐Entropy Carbides through Atomic Randomness
Advanced Theory and Simulations, 2020 High‐entropy carbides (HECs) are of great interest as they are promising candidates for ultra‐high‐temperature and high‐hardness applications. To discover carbides with enhanced yield strength and hardness, mechanism‐based design approaches are needed ...
Yichen Wang +5 more
semanticscholar +1 more source
Shape-independent hardness estimation using deep learning and a GelSight tactile sensor [PDF]
IEEE International Conference on Robotics and Automation, 2017 Hardness is among the most important attributes of an object that humans learn about through touch. However, approaches for robots to estimate hardness are limited, due to the lack of information provided by current tactile sensors.
Wenzhen Yuan +4 more
semanticscholar +1 more source
On the Cryptographic Hardness of Local Search [PDF]
, 2020 We show new hardness results for the class of Polynomial Local Search problems (PLS): - Hardness of PLS based on a falsifiable assumption on bilinear groups introduced by Kalai, Paneth, and Yang (STOC 2019), and the Exponential Time Hypothesis for ...
Bitansky, Nir, Gerichter, Idan
core +2 more sources
Quantum Teknika, 2021 Generally, metals are easy to wear, so material modification is needed to increase hardness to increase the material's resistance to wear and tear. One way is to do a hard chrome plating process using the electroplating method and then continue the heat ...
Bambang Hari Priyambodo +2 more
doaj +1 more source
Determination of the absolute hardness of electrolytically produced copper coatings by application of the Chicot-Lesage composite hardness model [PDF]
Journal of the Serbian Chemical Society, 2022 In this study, a novel procedure, based on application of the Chicot–Lesage (C–L) composite hardness model, was proposed for the determination of an absolute hardness of electrolytically produced copper coatings.
Mladenović Ivana O. +4 more
doaj +1 more source