Results 81 to 90 of about 1,188,998 (347)

A Positron Lifetime Study of Cooling and Natural Aging of Solutionized Aluminum Alloys

open access: yesAdvanced Engineering Materials, EarlyView.
The process during cooling of Al–Mg and Al–Mg–Si alloys from the solutionizing temperature down to 20 °C is interrupted. These states are analyzed with positron lifetime spectroscopy to trace the processes during cooling. In different temperature ranges, two stages of vacancy loss and solute clustering are identified.
Zi Yang, Mengjie Li, John Banhart
wiley   +1 more source

TWO NEW FINDS OF CLAY ANTHROPOMORPHIC FIGURINES IN LATE IRON AGE CONTEXTS FROM SOUTHWESTERN ROMANIA

open access: yesAnalele Banatului. Arheologie-Istorie, 2022
The presence of anthropomorphic figurines made of clay is well documented in the ”Getae” environment north of the Danube. Judging from their discovery context, the ”special” treatment visible on some of the pieces, as well as comparing these finds with ...
Andrei Georgescu
doaj  

Vikings, Rus, Varangians: The "Varangian Problem" in View of Ethnicity in Archaeology

open access: yesCurrent Swedish Archaeology, 2006
The Scandinavian activity in Russia during the Viking Age has left traces in both the archaeological and the written material. In the 13th century Russian annals, "The Primary Chronicle", a story is told ofhow "Varangians from beyond the sea" founded ...
Charlotta Hillerdal
doaj   +1 more source

Study of zinc deficiency in pregnant women [PDF]

open access: yes, 2004
Zinc is one of the elements necessary for growth and health in human. Some evidences indicate that the zinc deficiency is one of real difficulties for the public health in developed and developing countries.
Joshaghani, H.R.   +3 more
core  

High‐Entropy Alloy Design Toward Cobalt Substitution for High Hardness and Low Wear Rate Using X–Cr–Fe–Mn–Ni System

open access: yesAdvanced Engineering Materials, EarlyView.
This study explores the replacement of cobalt using the high‐entropy alloy design strategy for wear‐resistant components operating at high temperatures. Starting from the Cantor alloy, cobalt is substituted with Cu, Al, V, or Mo. Metallurgical and tribological analyses reveal that aluminum, vanadium, and molybdenum effectively strengthen the developed ...
Rafaël Jénot   +5 more
wiley   +1 more source

Hillforts, rocks and warriors

open access: yesDocumenta Praehistorica, 2018
During the Late Iron Age, monumental stone statues of warriors were established in the northwest of Iberia, ‘arming’ landscapes that ultimately encouraged specific types of semiotic ideologies in the region.
Javier Rodriguez-Corral
doaj   +1 more source

Ancient DNA from a 2700-year-old goitered gazelle ( Gazella subgutturosa ) supports gazelle hunting in Iron Age Central Asia

open access: gold, 2022
André E. R. Soares   +5 more
openalex   +1 more source

3D Printed Ultra‐Fast Plastic Scintillators Based on Perovskite‐Photocurable Polymer Composite

open access: yesAdvanced Functional Materials, Volume 35, Issue 12, March 18, 2025.
The demand for radiation detection is increasing in a number of fields, including high‐energy physics, medical imaging, and homeland security. This study serves to demonstrate the potential for the fabrication of fast perovskite‐based scintillators with complex shapes via stereolithographic additive manufacturing, representing a new path toward the ...
Antonella Giuri   +16 more
wiley   +1 more source

A Comparative Study of Plasma Trace Elements (Copper, Iron and Zinc) Status in Anaemic and Non-anaemic Pregnant Women in Abakaliki, Nigeria [PDF]

open access: yes, 2011
For a comparative study of plasma copper, iron and zinc between anaemic and non-anaemic pregnant women, data for anaemic (n = 223) and non-anaemic (n = 126) pregnant women drawn from a cohort of 351 pregnant Nigerians recruited at gestational age of ≤ 25
Ejikeme, BN   +3 more
core   +1 more source

3D (Bio) Printing Combined Fiber Fabrication Methods for Tissue Engineering Applications: Possibilities and Limitations

open access: yesAdvanced Functional Materials, EarlyView.
Biofabrication aims at providing innovative technologies and tools for the fabrication of tissue‐like constructs for tissue engineering and regenerative medicine applications. By integrating multiple biofabrication technologies, such as 3D (bio) printing with fiber fabrication methods, it would be more realistic to reconstruct native tissue's ...
Waseem Kitana   +2 more
wiley   +1 more source

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