Results 111 to 120 of about 34,934 (272)

New Results From the Pre‐Pottery Neolithic Site of Al Uyaynah, Tabuk, in Northwestern Saudi Arabia

Arabian Archaeology and Epigraphy, EarlyView.
ABSTRACT Al Uyaynah is a low sandstone mound on an alluvial plain, long known for its extensive surface remains of stone‐built circular and rectangular structures. Following test excavations in 2012, more detailed excavation was undertaken in 2016 within one of the largest rectangular stone structures.
Khalid Alasmari, Stephanie F. Piper, Kirsten Grothe, W. Derek Hamilton, Delphine Joly, Penny Bickle, Geoff Bailey   +6 more
wiley   +1 more source

Fire Performance of Recycled Aggregate Concrete: Experimental Assessment of Compressive Strength and Physical Deterioration at Elevated Temperatures

Construction Materials
Concrete remains one of the most widely utilized construction materials, valued particularly for its exceptional compressive strength. However, exposure to fire can compromise both its internal microstructure and external integrity.
Gabriela Peñafiel, Carlos Navarro, Santiago Medina Robalino, Fernanda Pico, Bernarda Abril, Byron Quishpe, Luis Felipe Contreras-Vásquez   +6 more
doaj   +1 more source

Seismic strengthening of beam-column joints with multidirectional CFRP laminates [PDF]

, 2012
An experimental program was carried out to analyse the potentialities of a technique based on the use of multidirectional CFRP laminates (MDL-CFRP) for the seismic repair and strengthening of reinforced concrete (RC) beam-column joints. This experimental
Barros, J., Coelho, M., Costa, A., Fernandes, P., Melo, J., Sena-Cruz, J., Varum, H.   +6 more
core   +1 more source

What can lithics tell us about hominin technology's ‘primordial soup’? An origin of stone knapping via the emulation of Mother Nature

Archaeometry, EarlyView.
Abstract The use of stone hammers to produce sharp stone flakes—knapping—is thought to represent a significant stage in hominin technological evolution because it facilitated the exploitation of novel resources, including meat obtained from medium‐to‐large‐sized vertebrates. The invention of knapping may have occurred via an additive (i.e., cumulative)
Metin I. Eren, Stephen J. Lycett, Michelle R. Bebber, Alastair Key, Briggs Buchanan, Emma Finestone, Joseph Benson, Rebecca Biermann Gürbüz, Adela Cebeiro, Roman Garba, Anne Grunow, C. Owen Lovejoy, Danielle MacDonald, Erica Maletic, G. Logan Miller, Joseph D. Ortiz, Jonathan Paige, Justin Pargeter, Tomos Proffitt, Mary Ann Raghanti, Teal Riley, Jeffrey I. Rose, David M. Singer, Robert S. Walker   +23 more
wiley   +1 more source

Damage Classification and Terminology for Machine Components: A Review of Standardization and Diagnostic Practice

Machines
Machine components are subject to a wide range of damage and failure processes, and their correct identification is essential for reliable operation, effective maintenance, and accurate diagnosis. However, a persistent gap exists between morphology-based
Cristina Popa, Sorin Cănănău, George Ghiocel Ojoc, Cătălin Pîrvu, Mario Constandache, Valentin Azamfirei, Lorena Deleanu   +6 more
doaj   +1 more source

The Fiery Eyes of a Maenad: Origin Determination of Faceted Garnet Eye Inlays in a Roman Bronze Bust From Southern Tyrol

Archaeometry, EarlyView.
ABSTRACT In 1837, the Tyrolean State Museum Ferdinandeum in Innsbruck, Austria, purchased a Roman bronze statue of a maenad from the 2nd century ce with red garnets as facetted eye inlays found near Brixen, Southern Tyrol. These garnets were investigated using optical microscopy, a portable hand‐held and a stationary micro‐X‐ray fluorescence device, as
H. Albert Gilg, Simon Wagner, Anton Höck, Peter Tropper   +3 more
wiley   +1 more source

Spalling of high strength concrete under contact explosive charge

Journal of Applied Science and Engineering
Spalling is the phenomenon of concrete destruction under the impact of high-speed loads such as impact or explosion at the surface opposite to the load source.
Duc Ngo The, Thang Dam Trong, Thuy Ngo Ngoc   +2 more
doaj   +1 more source

BRINGING BACK FAMILIAR FORMS: RECYCLING QUINA SCRAPERS AT THE LATE LOWER PALAEOLITHIC QESEM CAVE, ISRAEL

Oxford Journal of Archaeology, EarlyView.
Summary This study presents a technological analysis of 18 old patinated scrapers and spalls, mostly of Quina technology, that were recycled into new scrapers of the same type at the Late Lower Palaeolithic site of Qesem Cave, Israel (420–200 kyr). Recycling scrapers into the same Quina and demi‐Quina types offers a rare, controlled opportunity to ...
Bar Efrati
wiley   +1 more source

Mechanically Exfoliated InP Thin Films for Solar Energy Conversion Devices

Small Science
III‐V semiconductors are favoured photo absorber materials for solar energy conversion due to their ideal bandgap, yet their high‐cost hinders widespread adoption.
Bikesh Gupta, Parul, Yonghwan Lee, Joshua Zheyan Soo, Sonachand Adhikari, Olivier Lee Cheong Lem, Chennupati Jagadish, Hark Hoe Tan, Siva Karuturi   +8 more
doaj   +1 more source

Isothermal and cyclic oxidation at 1000 and 1100 deg C of four nickel-base alloys: NASA-TRW VIA, B-1900, 713C, and 738X [PDF]

The isothermal and cyclic oxidation resistance of four cast Ni-base gamma + gamma prime alloys, NASA-TRW Via, B-1900, 713C, and 738X, was determined in still air at 1000 and 1100 C.
Barrett, C. A., Lowell, C. E., Santoro, G. J.   +2 more
core   +1 more source