Results 61 to 70 of about 642,691 (356)

Mechanochemical Synthesis and Characterization of Nanostructured ErB4 and NdB4 Rare‐Earth Tetraborides

open access: yesAdvanced Engineering Materials, Volume 27, Issue 6, March 2025.
ErB4 and NdB4 nanostructured powders are produced by mechanochemical synthesis. 5 h mechanical alloying and 4 M HCl acid leaching are used in the production. ErB4 and NdB4 powders exhibit maximum magnetization of 0.4726 emu g−1 accompanied with an antiferromagnetic‐to‐paramagnetic phase transition at about TN = 18 K and 0.132 emu g−1 with a maximum at ...
Burçak Boztemur   +5 more
wiley   +1 more source

A Study on the Typology of the Seals of the Islamic Research Foundation Personal Collection in the City of Sough, Kohgiluyeh and Boyer Ahmad Province [PDF]

open access: yesهنر اسلامی, 2016
Seals are considered as original and first hand documents; hence, a comprehensive study on such seals is a required and necessary act. The patterns of the seals and coins are a rich visual collection that enhance the visual literacy and shapes the ...
Saeedeh Bagher Pour Najaf Abadi   +2 more
doaj  

Foreign Impact and Local Creativity. The Case of Late Bronze Age Seals from Aegean Anatolia [PDF]

open access: yesStudia Hercynia, 2022
Late Bronze Age seals and sealings from Aegean Anatolia (the western part of western Anatolia) are a very heterogeneous collection of finds. Especially widespread are seals belonging to the Aegean tradition, including earlier hard stone seals and later ...
Magda Pieniążek
doaj  

New insights into the diets of harbor seals (Phoca vitulina) in the Salish Sea revealed by analysis of fatty acid signatures

open access: yes, 2013
Harbor seals (Phoca fvitulina) are an abundant predator along the west coast of North America, and there is considerable interest in their diet composition, especially in regard to predation on valued fish stocks.
J. Bromaghin   +5 more
semanticscholar   +1 more source

Quantum seals

open access: yes, 2004
A quantum seal is a way of encoding a message into quantum states, so that anybody may read the message with little error, while authorized verifiers can detect that the seal has been broken.
Singh, Sudhir Kumar, Srikanth, R.
core   +1 more source

Geometric Optimization and Mechanical Performance Enhancement of Auxetic Structures for High‐Impact Applications Through Fused Deposition Modeling

open access: yesAdvanced Engineering Materials, EarlyView.
This study explores the mechanical performance of three auxetic structures, identifying a re‐entrant‐star hybrid as the most effective for impact absorption. Finite element simulations and experiments demonstrate significant gains in energy absorption and flexural strength after geometric optimization. This study investigates the mechanical performance
Malik Hassan   +4 more
wiley   +1 more source

The Imperial Visual Propaganda in the Empire of Trebizond (1204-1461)

open access: yesВестник Волгоградского государственного университета. Серия 4. История, регионоведение, международные отношения, 2015
The topic of this paper is the visual propaganda employed in the Empire of Trebizond to convey a sense of the greatness and power of the imperial dynasty of the Grand Komnenoi.
Tatyana Bardashova
doaj   +1 more source

The Archives of Artaxata: Archival Practice in the Capital of Ancient Armenia

open access: yesElectrum, 2021
This article examines the seal impressions from Artaxata discovered in 1979/80 during excavations carried out by the Armenian Academy of Sciences on Hills V and VIII.
Torben Schreiber
doaj   +1 more source

Improved circumferential shaft seal [PDF]

open access: yes, 1974
Comparative tests of modified and unmodified carbon ring seals showed that addition of helical grooves to conventional segmented carbon ring seals reduced leakage significantly.
Ludwig, L. P., Strom, T. N.
core   +1 more source

Dynamic Precipitation during High‐Pressure Torsion of a Magnesium–Manganese Alloy

open access: yesAdvanced Engineering Materials, EarlyView.
An ultrafine‐grained alloy is produced by high‐pressure torsion of solutionized Mg–1.35 wt% Mn. Precipitation of nanometer‐scale Mn particles during deformation provides pinning sites. This prevents the formation of a bimodal grain structure and results in a finer grain size than for pure Mg.
Julian M. Rosalie, Anton Hohenwarter
wiley   +1 more source

Home - About - Disclaimer - Privacy