Results 81 to 90 of about 333,594 (357)

L’application de la géophysique sur le canal Seine-Nord-Europe

Archéopages, 2016
The use of geophysics on linear developments is not recent. The specific challenges of this type of development, particularly during archaeological diagnosis, have led to several experiments with this type of non-destructive approach with varying degrees
Guillaume Hulin
doaj   +1 more source

Metallurgy and properties of plasma spray formed materials [PDF]

Understanding the fundamental metallurgy of vacuum plasma spray formed materials is the key to enhancing and developing full material properties. Investigations have shown that the microstructure of plasma sprayed materials must evolve from a powder ...
Liaw, Y. K., Mckechnie, T. N., Poorman, R. M., Zimmerman, F. R.   +3 more
core   +1 more source

Method of making carbide/fluoride/silver composites [PDF]

, 1991
A composition containing 30 to 70 percent chromium carbide, 5 to 20 percent soft noble metal, 5 to 20 percent metal fluorides, and 20 to 60 percent metal binder is used in a powdered metallurgy process for the production of self-lubricating components ...
Dellacorte, Christopher, Sliney, Harold E.   +1 more
core   +1 more source

Analysis of Economic Motives in the Individual Choice of Educational Paths [PDF]

, 2015
The authors consider the economic motivations when individuals choose an educational path. This line of research is relevant from both, the point of view of science — research of economic behavior of an individual, and the point of view of practice ...
Agarkov, G. A., Koksharov, V. A.
core   +2 more sources

Atomically Revealing Bulk Point Defect Dynamics in Hydrogen‐Driven γ‐Fe2O3 → Fe3O4 → FeO Transformation

Advanced Functional Materials, EarlyView.
In situ TEM uncovers the atomic‐scale mechanisms underlying hydrogen‐driven γ‐Fe2O3→Fe3O4→FeO reduction. In γ‐Fe2O3, oxygen vacancies cluster around intrinsic Fe vacancies, leading to nanopore formation, whereas in Fe3O4, vacancy aggregation is suppressed, preserving a dense structure.
Yupeng Wu, Dongxiang Wu, Wenhui Zhu, Xiaobo Chen, Zhikang Zhou, Zhilu Liang, Shuonan Ye, Meng Li, Xiao Tong, Kim Kisslinger, Sooyeon Hwang, Dmitri Zakharov, Renu Sharma, Judith C. Yang, Guangwen Zhou   +14 more
wiley   +1 more source

Effect of an electric field on a Leidenfrost droplet [PDF]

, 2012
We experimentally investigate the effect of an electric field applied between a Leidenfrost droplet and the heated substrate on which it is levitating.
Celestini, Franck, Kirstetter, G.
core   +3 more sources

Solar Heating Enhanced Selective Recovery of Metal Ions Through Flowing Electrodes Enabled by Hybrid Carbon Nanostructures

Advanced Functional Materials, EarlyView.
A new electrochemical system based on a microporous hybrid of carbon nanoplatelets and nanotubes to selectively capture Ni2+ from wastewater is constructed. The system temperature rises rapidly when irradiated with sunlight, which enhances the Ni2+ removal rate by 250% and the selectivity by 53%, and the energy consumption is also reduced by 51 ...
Ziquan Wang, Jiaqi Chen, Qiuru Lin, Mingxing Liang, Bo Yang, Yantao Chen, Minjun Kim, Yusuke Yamauchi, Stephen J. Eichhorn, Zhiqun Lin, Magdalena Titirici, Libo Deng   +11 more
wiley   +1 more source

Niveles de plomo en gestantes y neonatos en la ciudad de la Oroya, Perú

Revista Peruana de Medicina Experimental y Salud Pública
Objetivos. Determinar los niveles de plomo (Pb) en gestantes y neonatos en la ciudad de La Oroya, Perú. Materiales y métodos. Se realizó un estudio transversal.
Jorge Castro-Bedriñana, Doris Chirinos-Peinado, Elva Ríos-Ríos   +2 more
doaj  

Biomimetic Ion‐Orchestrated Hierarchical Armored Hydrogel Coating for Robust and Multifunctional Surface Protection

Advanced Functional Materials, EarlyView.
Inspired by the skin‐toughening mechanism of marine sponges, an ion‐orchestrated structural engineering strategy is proposed to regulate the surface microstructure of hydrogel coatings, enabling the in situ formation of a robust armor layer that enhances mechanical integrity and provides multifunctional protection by suppressing fouling attachment and ...
Wenshuai Yang, Ziqian Zhao, Weiyan Zhu, Lu Gong, Yongxiang Sun, Haoyu Yang, Ling Zhang, Wenfei Zhang, Hao Zhang, Fang Zhou, Xuwen Peng, Hongbo Zeng   +11 more
wiley   +1 more source

The influence of the material of the ultrasonic vibration concentrator on the amount of the amplitude of mechanical vibrations

Известия высших учебных заведений. Поволжский регион:Технические науки
Background. The purpose of this article is to study the effect of ultrasonic vibrations on the surface of a liquid for subsequent use in electric arc surfacing processes. Materials and methods.
A.A. Kazinskiy, D.V. Babakaev
doaj   +1 more source