Results 71 to 80 of about 818,954 (398)

4-dimensional Spin-foam Model with Quantum Lorentz Group

, 2011
We study the quantum group deformation of the Lorentzian EPRL spin-foam model. The construction uses the harmonic analysis on the quantum Lorentz group.
Han, Muxin
core   +3 more sources

so(4) Plebanski Action and Relativistic Spin Foam Model [PDF]

, 1998
In this note we study the correspondence between the ``relativistic spin foam'' model introduced by Barrett, Crane and Baez and the so(4) Plebanski action.
Baez J, Capovilla R, Capovilla R, Crane L, Freidel L, Krasnov K, L Freidel, Obukhov Yu N, Ooguri H, Pillin M, Plebanski J F, R De Pietri, Reisenberger M, Reisenberger M, Reisenberger M, Urbantke H, Yetter D   +16 more
core   +2 more sources

Effect of Foot Orthoses on Midfoot Pain and the Volume of Bone Marrow Lesions in the Midfoot: A Randomized Mechanism of Action Study

Arthritis Care &Research, EarlyView.
Objective Foot orthoses are thought to improve pain by potentially modifying internal mechanical forces. To test this, we explored whether foot orthoses can modify patterns of bone marrow lesions (BMLs) in people with midfoot pain. Methods Forty‐two people were recruited with midfoot pain, and magnetic resonance imaging–confirmed midfoot BMLs ...
Jill Halstead, Anne‐Maree Keenan, Philip G. Conaghan, Dennis McGonagle, Anthony C. Redmond   +4 more
wiley   +1 more source

Experimental Evaluation of Foam Diversion for EOR in Heterogeneous Carbonate Rocks

Colloids and Interfaces, 2022
Immiscible gas injection applied to heterogeneous carbonate reservoirs can be inefficient due to poor conformance control. Foam mobility control is proposed in this work as a solution for gas conformance issues in such reservoirs.
Motaz Taha, Pramod Patil, Quoc Nguyen
doaj   +1 more source

Smooth Muscle Cells Contribute the Majority of Foam Cells in ApoE (Apolipoprotein E)-Deficient Mouse Atherosclerosis

Arteriosclerosis, Thrombosis and Vascular Biology, 2019
Objective— Smooth muscle cells (SMCs) are the most abundant cells in human atherosclerotic lesions and are suggested to contribute at least 50% of atheroma foam cells. In mice, SMCs contribute fewer total lesional cells.
Ying Wang, Joshua A. Dubland, S. Allahverdian, Enyinnaya Asonye, B. Sahin, J. Jaw, D. Sin, M. Seidman, N. Leeper, G. Francis   +9 more
semanticscholar   +1 more source

From spacetime foam to holographic foam cosmology [PDF]

, 2006
Due to quantum fluctuations, spacetime is foamy on small scales. For maximum spatial resolution of the geometry of spacetime, the holographic model of spacetime foam stipulates that the uncertainty or fluctuation of distance $l$ is given, on the average,
Ahluwalia, Amelino-Camelia, Amelino-Camelia, Ashtekar, Bak, Bekenstein, Caldwell, Chen, Christiansen, Christiansen, Cohen, Easther, Ellis, Fischler, Ford, Giovannetti, Hawking, Hawking, Hochberg, Hochberg, Hooft, Hu, Hu, Jankiewicz, Kaloper, Karolyhazy, Krauss, Lloyd, Lloyd, Margolus, Maziashvili, Michele Arzano, Ng, Ng, Ng, Ng, Ng, Ng, Perlman, Ratra, Sasakura, Sorkin, Susskind, Thomas, Thomas W. Kephart, Thompson, Veneziano, Verlinde, Wetterich, Wheeler, Y. Jack Ng, Zizzi   +51 more
core   +3 more sources

Geometric Optimization and Mechanical Performance Enhancement of Auxetic Structures for High‐Impact Applications Through Fused Deposition Modeling

Advanced Engineering Materials, EarlyView.
This study explores the mechanical performance of three auxetic structures, identifying a re‐entrant‐star hybrid as the most effective for impact absorption. Finite element simulations and experiments demonstrate significant gains in energy absorption and flexural strength after geometric optimization. This study investigates the mechanical performance
Malik Hassan, Manjusri Misra, Alexander Bardelcik, Stefano Gregori, Amar K. Mohanty   +4 more
wiley   +1 more source

X‐Ray Tomography Analysis of Damage Mechanisms in Metal Matrix Syntactic Foams During Compression

Advanced Engineering Materials, EarlyView.
In situ synchrotron X‐ray tomography is used to investigate the internal damage mechanisms of AlSi12 metal matrix syntactic foam with ceramic hollow spheres during compressive loading. It is concluded that a homogeneous distribution of the second‐phase filler material results in a sequential collapse in a localized region; this leads to controlled and ...
Indrajeet Tambe, János Endre Maróti, Imre Norbert Orbulov, Zoltan Hegedűs, Markus Ziehmer, Carl E. Krill III, Håkan Hallberg, Pär A. T. Olsson, Johan Hektor   +8 more
wiley   +1 more source

The Effect of Electrolytes and Urea on the Ethyl Lauroyl Arginate and Cellulose Nanocrystals Foam Stability

Applied Sciences, 2022
Carboxylated cellulose nanocrystals (cCNC) are highly dispersible particles useful in many industries. In particular, they can be applied to form Pickering emulsions and foams for “green” applications in the cosmetics, pharmaceutical industry or food ...
Agnieszka Czakaj, Marcel Krzan, Piotr Warszyński   +2 more
doaj   +1 more source

Development and Preliminary In Vivo Study of 3D‐Printed Bioactive Glass Scaffolds with Trabecular Architecture

Advanced Engineering Materials, EarlyView.
This study reports the fabrication of trabecular bioactive glass scaffolds (composition “1d”: 46.1SiO2‐28.7CaO‐8.8MgO‐6.2P2O5‐5.7CaF2‐4.5Na2O wt%) through vat photopolymerization and the relevant results from mechanical testing and in vivo implantation procedures in rabbit femora, showing great promise for bone tissue engineering applications.
Dilshat Tulyaganov, Roberta Gabrieli, Avzal Akbarov, Nigora Nigmatova, Bekhzod Khabilov, Alessandro Schiavi, Martin Schwentenwein, Enrica Verné, Francesco Baino   +8 more
wiley   +1 more source