Results 11 to 20 of about 62,749 (217)

Effect of reaction sintering modes on the structure and properties of carbide ceramics

open access: yesВесці Нацыянальнай акадэміі навук Беларусі: Серыя фізіка-тэхнічных навук, 2019
Experimental studies of the structure, phase composition, physical and mechanical properties of the reaction-sintered ceramics based on silicon carbide and boron obtained by reaction sintering have been performed. It has been shown that the properties of
E. V. Zvonarev   +4 more
doaj   +1 more source

Lightweight vitreous carbon material: approaches to making open-pore cellular structure [PDF]

open access: yesINCAS Bulletin, 2019
Cellular vitreous carbons with the open-pore structure are attractive materials in some aerospace applications, such as the super-lightweight structural materials or sandwich core materials in the thermal protection systems.
Oleg SMORYGO   +4 more
doaj   +1 more source

The Mosaics of the Roman Villa of São Simão, Penela, Portugal

open access: yesJournal of Mosaic Research, 2017
The Roman Villa of São Simão, part of the ancient municipium of Conímbriga, in the province of Lusitania, is located in the area correspondent to the churchyard, public road and lands adjacent to the Chapel of Our Lady of Grace, in São Simão, within the ...
Sónia VICENTE, Ana Luísa MENDES
doaj   +1 more source

Influence of heat treatment on the structure and properties of pseudo-alloy steel – copper alloy obtained by infiltration

open access: yesВесці Нацыянальнай акадэміі навук Беларусі: Серыя фізіка-тэхнічных навук, 2022
The paper presents the results of studies of the effect of heat treatment regimes on changes in the structure and properties of steel-copper alloy pseudo-alloys obtained by infiltration.
L. N. Dyachkova
doaj   +1 more source

Fragment of a Wagon Wheel Hub: Restoration and Conservation

open access: yesProceedings, 2020
In order to stop the corrosion process which damaged the wagon wheel hub, it was necessary toperform a thorough and laborious restoration process on it [1]. [...] 
Mihaela Beceanu, Dorina Liliana Dan
doaj   +1 more source

States of emergency

open access: yesKoers : Bulletin for Christian Scholarship, 1989
Noodtoestand. Nood toestand word deesdae as so alle daags en gemeenplasig beskou dat daar nie werklik sprake van diepgaande gesprekvoering en besinning oor die bestaan, inhoud en voortsetting daarvan is nie.
W. du Plessis, N. J. J. Olivier
doaj   +1 more source

Numerical and Experimental Investigation of Fretting Wear in Connecting Rod Big-End Bearings of Nuclear Emergency Diesel Generators

open access: yesLubricants
The operational reliability of Emergency Diesel Generators (EDGs) is paramount for the safety of nuclear power plants. This study investigates the fretting wear mechanism on the non-working back-face of connecting rod big-end bearings—a critical failure ...
Shuai Zu   +7 more
doaj   +1 more source

On some inequalities involving isotonic functionals

open access: yesJournal of Numerical Analysis and Approximation Theory, 1988
Not available.
Dorin Andrica, Mihai Onucu Drimbe
doaj   +2 more sources

Exploring the Perceived Impact of Smart City Dimensions on Supply Chain Management: A Case Study of a South African Municipality

open access: yesInformation
Municipalities in South Africa face increasing pressure to improve service delivery, operational efficiency, and sustainability amid growing urbanisation and governance challenges.
Alexander Bradley Samuels
doaj   +1 more source

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