Results 51 to 60 of about 4,822 (286)

Tell es-Sultan 2015. A pilot project for archaeology in Palestine [PDF]

open access: yes, 2016
The eleventh season (April–June 2015) of the archaeological investigation and site protection as well as valorization of the site of Tell es-Sultan was carried out by the University of Rome “La Sapienza” (under the direction of the present writer) and ...
Nigro, Lorenzo
core   +1 more source

A Systematic Comparison of Alpha‐Synuclein Seed Amplification Assays for Increasing Reproducibility

open access: yesAnnals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Seed amplification assays (SAAs) enable ultrasensitive detection of misfolded α‐synuclein across biofluids and tissues. Yet, heterogeneity in protocols limits cross‐study comparability and clinical translation. Here, we review α‐synuclein SAA methods and their performance across various biological matrices.
Manuela Amaral‐do‐Nascimento   +3 more
wiley   +1 more source

A Review on the Long-Term Performance of Proton Exchange Membrane Fuel Cells: From Degradation Modeling to the Effects of Bipolar Plates, Sealings, and Contaminants

open access: yesEnergies, 2022
Proton-exchange membrane fuel cells (PEMFCs) are regarded as promising alternatives to internal combustion engines (ICEs) to reduce pollution. Recent research on PEMFCs focuses on achieving higher power densities, reducing the refueling time, mitigating ...
Hossein Pourrahmani   +6 more
doaj   +1 more source

Mycenaean Seals and Sealings [PDF]

open access: yes, 2012
Abstract After the introduction of a sealing system from the Near East into southern Greece in the Early Helladic period and the destruction of that culture, there is no demonstrable sign that seals were used on the Greek mainland until the sudden appearance of seals in the Mycenae Shaft Graves at the end of the Middle Helladic period ...
openaire   +1 more source

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

Sensitivity analysis overlaps of friction elements in cartridge seals

open access: yesMATEC Web of Conferences, 2018
Cartridge seals are self-contained units consisting of a shaft sleeve, seals, and gland plate. The applications of mechanical seals are numerous. The most common example of application is in bearing production for automobile industry.
Žmindák Milan, Falat Miloš
doaj   +1 more source

Rubber friction on wet and dry road surfaces: the sealing effect

open access: yes, 2005
Rubber friction on wet rough substrates at low velocities is typically 20-30% smaller than for the corresponding dry surfaces. We show that this cannot be due to hydrodynamics and propose a novel explanation based on a sealing effect exerted by rubber on
A. D. Roberts   +14 more
core   +1 more source

Evaluation of the Potential of Laser Shock Peening Compared with Cold Expansion for Improving Fatigue Resistance of Riveted Lap Joints of Aerospace Grade 7175 Al Alloy

open access: yesAdvanced Engineering Materials, EarlyView.
This study investigates laser shock peening for enhancing fatigue performance of riveted aerospace aluminum joints. A comparative approach with cold expansion combines fatigue testing and synchrotron X‐ray methods. Integrating mechanical testing with residual stress and strain characterization provides insights into how different treatments affect the ...
Ogün Baris Tapar   +6 more
wiley   +1 more source

Identification of Rub and Unbalance in 320 MW Turbogenerators

open access: yesInternational Journal of Rotating Machinery, 2003
This article presents two experiences of applying a model-based fault-identification method to real machines. The first case presented is an unbalance identification in a 320 MW turbogenerator unit operating in a fossil power plant.
N. Bachschmid   +4 more
doaj   +1 more source

Umayyad Lead Sealings [PDF]

open access: yes, 2010
The following article will deal with Islamic sealings from Umayyad jund al- Urdunn and jund Filasṭīn. A few things have to be said as we start. The Umayyad period stretches from 41-132 H/661-750 C.E.
Nintzan, Amitai-Preiss
core   +1 more source

Home - About - Disclaimer - Privacy