Results 71 to 80 of about 221,217 (305)

Viscous instabilities in flowing foams: A Cellular Potts Model approach

, 2006
The Cellular Potts Model (CPM) succesfully simulates drainage and shear in foams. Here we use the CPM to investigate instabilities due to the flow of a single large bubble in a dry, monodisperse two-dimensional flowing foam.
Cantat I Delannay R, Earnshaw J C, Glazier J A, Hieber C A, James A Glazier, Kawasaki K, Lordereau O, Soma Sanyal, Weaire D, Weaire D, Weaire D   +10 more
core   +1 more source

Spacetime as a Feynman diagram: the connection formulation [PDF]

, 2000
Spin foam models are the path integral counterparts to loop quantized canonical theories. In the last few years several spin foam models of gravity have been proposed, most of which live on finite simplicial lattice spacetime.
Ashtekar A, Ashtekar A, Ashtekar A, Ashtekar A, Baez J, Baez J, Baez J, Barrett J W, Boulatov D V, Carlo Rovelli, Crane L, Crane L, Crane L, Crane L, de Pietri R, de Pietri R, Foxon T J, Foxon T J, Freidel L, Fritelli S, Gambini R, Gaul M, Georgi H, Gross D, Gupta S, Horowitz G, Iwasaki J, Iwasaki J, Markopolou F, Markopolou F, Markopolou F, Markopolou F, Michael P Reisenberger, Ooguri H, Ponzano G, Reisenberger M, Reisenberger M, Reisenberger M, Reisenberger M, Reisenberger M, Rovelli C, Rovelli C, Rovelli C, Rovelli C, Rovelli C, Thiemann T, Turaev V, Turaev V, Zapata J A, Zapata J A, Zapata J A   +50 more
core   +2 more sources

Air‐Pressure–Actuated Vibroacoustic Metamaterial With Tunable Bandgap: Design, Modeling, and Characterization

Advanced Engineering Materials, EarlyView.
This article presents the design, modeling, and characterization of air‐pressure–actuated programmable vibroacoustic metamaterials (PVAMM). The study focuses on leveraging air pressure to dynamically tune resonance frequencies for effective noise attenuation.
William Kaal, Michael M. Becker, Sarah C. L. Fischer   +2 more
wiley   +1 more source

Cholesterol and oxysterol metabolism and subcellular distribution in macrophage foam cells: accumulation of oxidized esters in lysosomes

Journal of Lipid Research, 2000
Cholesterol- and cholesteryl ester-rich macrophage foam cells, characteristic of atherosclerotic lesions, are often generated in vitro using oxidized low density lipoprotein (OxLDL).
Andrew J. Brown, Erin L. Mander, Ingrid C. Gelissen, Leonard Kritharides, Roger T. Dean, Wendy Jessup   +5 more
doaj   +1 more source

Preparation and properties of open-cell zinc foams as human bone substitute material [PDF]

China Foundry, 2019
Foamed zinc was prepared by infiltration casting process. The mechanical properties and corrosion resistance of the samples were studied, and the feasibility of the foamed zinc as a bone implant material was discussed. All the compression stress-strain
Zhi-gang Li, Xiao-guang Zhang, Peng Huang   +2 more
doaj   +1 more source

A jigsaw puzzle framework for homogenization of high porosity foams [PDF]

, 2016
An approach to homogenization of high porosity metallic foams is explored. The emphasis is on the \Alporas{} foam and its representation by means of two-dimensional wire-frame models.
Crombez, Geert, Rost, Silke, Stefan Sütterlin, Stefan, van Ryckeghem, Dimitri, Veirman, Elke, Vögele, Claus   +5 more
core   +6 more sources

Evaluating Energy Absorption Performance of Filled Lattice Structures

Advanced Engineering Materials, EarlyView.
Maximum stress must be considered to robustly evaluate energy absorber designs. This approach was applied to compare all types of absorbers in a single Ashby diagram and determine the utility of filling lattice voids with a second material. High‐performance fillers can improve the performance of lattices that are limited by buckling or catastrophic ...
Christian Bonney, William P. King, Iwona Jasiuk   +2 more
wiley   +1 more source

Oxidized LDL activates phospholipase A2 to supply fatty acids required for cholesterol esterification

Journal of Lipid Research, 2003
We examined the roles of phospholipase A2 (PLA2) in oxidized LDL (oxLDL)-induced cholesteryl ester formation in macrophages. In [3H]oleic acid-labeled RAW264.7 cells and mouse peritoneal macrophages, oxLDL induced [3H]cholesteryl oleate formation with an
Satoshi Akiba, Yukimasa Yoneda, Satoshi Ohno, Megumi Nemoto, Takashi Sato   +4 more
doaj   +1 more source

Effectiveness of microwave processing approach and green blowing agents usage in foaming natural rubber

Journal of Materials Research and Technology, 2020
This study mainly concerns the role of foam heating process techniques and its impact on cellular micromorphology, density and gas liberation mechanism of natural rubber foam with distilled water as blowing agent. Three different modes of heating process
Zulkifli Mohamad Ariff, Lukmon Owolabi Afolabi, Leandra Oliveira Salmazo, Miguel Angel Rodriguez-Perez   +3 more
doaj   +1 more source

Regulation of Foam Cells by Adenosine [PDF]

Arteriosclerosis, Thrombosis, and Vascular Biology, 2012
Macrophages rely on reverse cholesterol transport mechanisms to rid themselves of excess cholesterol. By reducing accumulation of cholesterol in the artery wall, reverse cholesterol transport slows or prevents development of atherosclerosis. In stable macrophages, efflux mechanisms balance influx mechanisms, and accumulating lipids do not overwhelm the
Allison B, Reiss, Bruce N, Cronstein
openaire   +2 more sources