Results 1 to 10 of about 617,967 (333)

Bulk microstructure evolution of two high Hf–containing nickel–based alloys during exposure at temperatures from 1100 to 1250°C [PDF]

open access: yesChemical Review and Letters, 2021
Two Hf–poorest versions of a high performance chromia–forming nickel–based polycrystalline cast alloy reinforced by HfC carbides were investigated by replacing more or less hafnium by tantalum to reduce production cost.
Patrice BERTHOD, Dame Assane Kane
doaj   +1 more source

Changes in the structure and properties of ZrO2 detonation coatings during annealing

open access: yesEurasian Journal of Physics and Functional Materials, 2021
The article studied the effect of annealing on the structure and properties of zirconium dioxide coatings obtained by detonation spraying. Detonation spraying was realized on a computerized detonation spray ing complex of the new generation CCDS2000 ...
B. K. Rakhadilov   +5 more
doaj   +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

Physical properties of kernels from modern maize hybrids used in Croatia [PDF]

open access: yesJournal of Central European Agriculture, 2020
The physical properties of maize are a result of kernel structure, they indicate chemical properties of the kernel, and hence, its nutritive value. This research aimed to explore the physical traits of kernels of 80 commercial maize hybrids from nine ...
Kristina Kljak   +6 more
doaj   +1 more source

Investigation of microstructural evolution of gas-assisted metal injection molded and sintered Mg-0.5Ca alloy [PDF]

open access: yesScience of Sintering, 2022
In this study, Mg-0.5Ca alloy was produced in a newly designed unit during the metal injection molding process. 40μmD90 Mg powder and 500nmD90 Ca powder were used in accordance with injection molding and powder sintering rules.
Cicek Bunyamin   +3 more
doaj   +1 more source

On the Cryptographic Hardness of Local Search [PDF]

open access: yes, 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

Crystal Indentation Hardness

open access: yesCrystals, 2017
There is expanded interest in the long-standing subject of the hardness properties of materials. A major part of such interest is due to the advent of nanoindentation hardness testing systems which have made available orders of magnitude increases in ...
Ronald W. Armstrong   +2 more
doaj   +1 more source

Modelling Timbral Hardness

open access: yesApplied Sciences, 2019
Hardness is the most commonly searched timbral attribute within freesound.org, a commonly used online sound effect repository. A perceptual model of hardness was developed to enable the automatic generation of metadata to facilitate hardness-based ...
Andy Pearce, Tim Brookes, Russell Mason
doaj   +1 more source

Automated soil hardness testing machine [PDF]

open access: yes, 2007
This paper describes the design and performance of a mechatronic system for controlling a standard drop-hammer mechanism that is commonly used in performing outdoor soil or ground hardness tests. A low-cost microcontroller is used to control a hydraulic
Cubero, Samuel N.   +1 more
core   +2 more sources

Hardness Amplification of Optimization Problems [PDF]

open access: yes, 2019
In this paper, we prove a general hardness amplification scheme for optimization problems based on the technique of direct products. We say that an optimization problem ?
Goldenberg, Elazar, Karthik C. S.,
core   +2 more sources

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