Results 101 to 110 of about 215,871 (234)

Bridging the Late Antique Gap in Northwest Arabia: New Archaeological Evidence on the Occupation of Wādī al‐Qurā (al‐ʿUlā [AlUla], Saudi Arabia) Between the Third and Seventh Centuries CE

Arabian Archaeology and Epigraphy, EarlyView.
ABSTRACT In 2019, the Dadan Archaeological Project (CNRS/RCU/AFALULA) identified a Late Antique village 1 km south of ancient Dadan in the al‐ʿUlā valley (northwest Saudi Arabia). Three excavation seasons at this site (2021–2023) have uncovered a massive building constructed in the late third or early fourth cent.
Jérôme Rohmer, Abdulrahman Alsuhaibani, Charlène Bouchaud, Elora Chambraud, Vladimir Dabrowski, Hatem Djerbi, Fabien Lesguer, Hervé Monchot, Paul Picavet, Louise Purdue, Bertrand Riba, Shadi Shabo   +11 more
wiley   +1 more source

Modulation and Radial Migration of Turbine Hub Cavity Modes by the Rim Seal Purge Flow

, 2016
In the present paper, the results of an experimental and numerical investigation of the hub cavity modes and their migration into the main annulus flow are presented.
Schmid, G., Abhari, R. S., Schädler, R., Voelker, S., Kalfas, A. I.   +4 more
core   +1 more source

Effect of Annulus Flow Conditions on Turbine Rim Seal Ingestion [PDF]

, 2019
A systematic study of sealing performance for a chute style turbine rim seal using URANS methods is reported. This extends previous studies from a configuration without external flow in the main annulus to cases with a circumferentially uniform axial ...
Gao, Feng, Chew, John W., Feng Gao, Palermo, Donato M., John W. Chew, Beard, Paul F., Paul F. Beard, Donato M. Palermo   +7 more
core   +1 more source

Analysis of the Behaviour of the Floating Roof in a Cylindrical Storage Tank Subjected to Seismic Excitation for the Mitigation of Fire Risk

Chemical Engineering Transactions, 2023
Natural Hazard triggering Technological Disasters (NaTech) are accidents resulting from natural hazards, such as earthquakes, interacting with industrial risks.
Michela Salimbeni, Maurizio De Angelis, Mariano Ciucci   +2 more
doaj  

Supplementing beef cattle diets with brown seaweed affects coprophagous beetles' dung use

Agricultural and Forest Entomology, EarlyView.
Supplementing beef cattle diets with brown seaweed reduced the attractiveness of dung for a common dung beetle (Onthophagus nuchicornis). Dietary supplementation with brown seaweed appeared to reduce the proportion of major males in the F1 generation.
Samantha Bennett, Rhea Lumactud, Ghader Manafiazar, Paul Manning   +3 more
wiley   +1 more source

Unsteady interaction between annulus and turbine rim seal flows

, 2012
In core gas turbines relatively cold air is purged through the hub gap between the stator and rotor in order to seal the disk space against flow ingestion from the main annulus.
Hodson, H, Chilla, M, Newman, D, ,
core  

Use of Pressure Measurements to Determine Effectiveness of Turbine Rim Seals

Volume 5C: Heat Transfer, 2014
The ingress of hot gas through the rim seal of a gas turbine depends on the pressure difference between the mainstream flow in the turbine annulus and that in the wheel-space radially inward of the rim seal. In this paper, a previously published orifice model is modified so that the sealing effectiveness εc determined from concentration measurements in
Owen, J M, Wu, K, Scobie, J A; id_orcid 0000-0002-1827-3635, Sangan, C M, Cho, G, Lock, G D; id_orcid 0009-0005-2147-9780   +5 more
openaire   +2 more sources

Between Gaps and Voids: An Archaeometrical Study of Degraded Fibers in a Sherd From the Cueva dos Chinches Muertas, Siltzul (Raxruha, Alta Verapaz, Guatemala)

Archaeometry, EarlyView.
ABSTRACT In 2019, excavations at the Cueva dos Chinches Muertas carried out by the Raxruha Viejo Project uncovered a small ceramic sherd distinguished by a stratified structure composed of multiple layers of textile imprints, both superficial and transversal.
Marie Ramelet
wiley   +1 more source

Morphology of powerful suction organs from blepharicerid larvae living in raging torrents

BMC Zoology, 2019
Background Suction organs provide powerful yet dynamic attachments for many aquatic animals, including octopus, squid, remora, and clingfish. While the functional morphology of suction organs from some cephalopods and fishes has been investigated in ...
Victor Kang, Richard Johnston, Thomas van de Kamp, Tomáš Faragó, Walter Federle   +4 more
doaj   +1 more source

A revised classification system of the marronoid clade of spiders (Araneae), based on dense sampling phylogenomics and comparative morphology

Cladistics, EarlyView.
Abstract The marronoid clade is a globally distributed, ecologically diverse group of spiders. It is an important faunal component in both natural and synanthropic environments, and even found in aquatic and extreme habitats such as desert salt flats. The systematics of the marronoid clade has been notoriously unstable due to the widespread character ...
Jonas O. Wolff, Michael B. J. Kelly, Franklyn Cala‐Riquelme, Jacob A. Gorneau, Katherine O. Montana, Helen M. Smith, Phil J. Sirvid, Cor J. Vink, Lauren A. Esposito, Martín J. Ramírez, Charles E. Griswold   +10 more
wiley   +1 more source