Results 41 to 50 of about 422,840 (291)

Ateliers primaires de l’Égypte gréco-romaine : le site de Beni Salama dans le Wadi Natrun

open access: yesArchéopages, 2010
The Beni Salama Site in the region of Wadi Natrun is of key importance if we are to understand the role of Egypt in the glass-making industry of antiquity. Excavations on ancient glass-making sites in the Near East suggested that similar furnaces existed
Marie-Dominique Nenna
doaj   +1 more source

Lead-doped ruthenium-iridium oxide catalysts for durable acidic oxygen evolution in proton exchange membrane electrolyzers at 3 A cm−2

open access: yesMaterials Futures
Widespread deployment of proton exchange membrane water electrolyzers (PEMWE) relies on acid-stable oxygen evolution reaction (OER) catalysts capable of operating at high current densities.
Jingwei Wang   +14 more
doaj   +1 more source

Normal‐Appearing White Matter Injury Mediates Chronic Deep Venous Hypoxia and Disease Progression in Multiple Sclerosis

open access: yesAnnals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective To explore how cerebral hypoxia and Normal‐Appearing White Matter (NAWM) integrity affect MS lesion burden and clinical course. Methods Seventy‐nine MS patients, including 13 clinically isolated syndrome (CIS) patients and 66 relapsing–remitting multiple sclerosis (RRMS) patients, and 44 healthy controls (HCs) were recruited from ...
Xinli Wang   +8 more
wiley   +1 more source

Slab melting versus slab dehydration in subduction-zone magmatism [PDF]

open access: yesProceedings of the National Academy of Sciences, 2011
The second critical endpoint in the basalt-H 2 O system was directly determined by a high-pressure and high-temperature X-ray radiography technique. We found that the second critical endpoint occurs at around 3.4 GPa and 770 °C (corresponding to a depth of approximately 100 km in a subducting slab), which is much ...
Kenji, Mibe   +4 more
openaire   +2 more sources

Finite-size effects of a left-handed material slab on the image quality

open access: yes, 2004
The characteristics of an imaging system formed by a left-handed material (LHM) slab of finite length are studied, and the influence of the finite length of the slab on the image quality is analyzed.
A. Taflove   +4 more
core   +1 more source

Investigation of Oxygen‐Free Wetting Behavior of Aluminum on Copper via Molecular Dynamics Simulations and Experiments

open access: yesAdvanced Engineering Materials, EarlyView.
The wettability of aluminum droplets (Al) on different copper substrates (Cu), where liquid Al spreads on solid Cu surfaces to form a liquid–solid interface, is studied numerically and experimentally. The experimental and numerical results show good agreement in the fast‐spreading regime.
Shan Lyu   +8 more
wiley   +1 more source

EVALUATION OF ELASTIC DEFLECTIONS AND BENDING MOMENTS FOR ORTHOTROPICALLY REINFORCED CONCRETE RECTANGULAR SLABS SUPPORTED ON THREE EDGES ONLY AND SUBJECTED TO TRIANGULAR LOAD

open access: yesDiyala Journal of Engineering Sciences, 2009
This paper deals with the evaluation of the elastic deflections and bending moments for orthotropically reinforced concrete rectangular slabs supported on three variously restrained edges with the fourth edge free and subjected to triangular load ...
Sarmad S. Abdul-Qader AL-Badri
doaj   +1 more source

Production of MgO/TiC Composites From MgO‐C Recyclates Using Spark Plasma Sintering

open access: yesAdvanced Engineering Materials, EarlyView.
Using the spark plasma sintering technique, MgO/TiC composites are manufactured from recycled MgO‐C refractories stemming from the steel production that were mixed with titanium powder. This article shows, how the size of the Ti grains and their distribution in the powder mixture affect the local carbon concentration in TiC.
Jiayan Yu   +3 more
wiley   +1 more source

Effective Compressive Strengths of Corner and Edge Concrete Columns Based on an Adaptive Neuro-Fuzzy Inference System

open access: yesApplied Sciences, 2020
In the current design codes, the effective compressive strength can be used to reflect decrease in load-transfer performance when upper/lower columns and slabs have different concrete compressive strengths.
Hae-Chang Cho   +5 more
doaj   +1 more source

Adjustable slab-aberration compensator for high power slab laser

open access: yesOptics Express, 2020
An adjustable slab-aberration compensator (ASAC) with the ability to compensate the large magnitude inherent wavefront aberrations in the slab width direction is proposed and experimentally demonstrated. The ASAC has a size of 130mm×45mm (effective aperture of 75mm×28mm) and 11 actuators along the length with a contact spacing of 8 mm.
Chongfeng Shao   +10 more
openaire   +2 more sources

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