Results 41 to 50 of about 221,217 (305)

A Quasiperiodic Gibbons--Hawking Metric and Spacetime Foam [PDF]

, 1995
We present a quasiperiodic self-dual metric of the Gibbons--Hawking type with one gravitational instanton per spacetime cell. The solution, based on an adaptation of Weierstrassian $\zeta$ and $\sigma$ functions to three dimensions, conforms to a ...
A. Ashtekar, A. Ashtekar, Cihan Saçlıog̃lu, F. Gürsey, G. 't Hooft, G. W. Gibbons, G. W. Gibbons, H. B. Nielsen, I. A. B. Strachan, J. Ambjorn, J. D. E. Grant, J. D. Finley, M. F. Atiyah, M. K. Prasad, M. T. Anderson, N. Seiberg, R. Jackiw, R. Penrose, R. Rossi, S. Nergiz, S. W. Hawking, Serdar Nergiz, T. Eguchi, T. Eguchi, V. Husain   +24 more
core   +2 more sources

Preparation and properties of condensed silicone rubber fireproof foam for power plugging

Hecheng xiangjiao gongye, 2022
The effects of the viscosity and content of vinyl silicone oil and fireproof fillers with different shape on the cell structure and fire resistance of condensed silicone rubber foam materials were stu-died.
DUAN Yu-bing; LI Peng-fei; YAO Jin-xia; MA Guo-qing; ZHANG Hao; ZHANG Chen
doaj   +1 more source

Fabrication of Two-Layered Aluminum Foam with Closed-Cell and Open-Cell Structures and Shaping of Closed-Cell Layer by Press Forming Immediately after Foaming

Metals, 2021
Two-layered aluminum foam consisting of both closed and open cells is expected to improve the functionality of aluminum foam, because the cells have different morphologies and characteristics.
Yoshihiko Hangai, Mizuki Ando, Masataka Ohashi, Kenji Amagai   +3 more
doaj   +1 more source

Experimental evidence of flow destabilization in a 2D bidisperse foam [PDF]

, 2006
Liquid foam flows in a Hele-Shaw cell were investigated. The plug flow obtained for a monodisperse foam is strongly perturbed in the presence of bubbles whose size is larger than the average bubble size by an order of magnitude at least.
C. Poloni, D. Weaire, G. Hirasaki, I. Cantat, R. Delannay   +4 more
core   +3 more sources

Development of the Al₁₂SiCuFe Alloy Foam Composites with ZrSiO₄ Reinforcements at Different Foaming Temperatures

Metals, 2023
Lightweight aluminum composite is a class of foam material that finds many applications. These properties make it suitable for many industries, such as the transportation, aerospace and sports industries.
Suresh Kumar, Sanjeev Kumar, Pardeep Kumar Nagpal, Sharad Ramdas Gawade, Sachin Salunkhe, Udayagiri Chandrasekhar, João Paulo Davim   +6 more
doaj   +1 more source

Inclisiran inhibits oxidized low-density lipoprotein-induced foam cell formation in Raw264.7 macrophages via activating the PPARγ pathway

Autoimmunity, 2022
Proprotein convertase subtilisin kexin type 9 (PCSK9) is a well-known proprotein convertase that influences foam cell formation and modulates atherosclerosis. Inclisiran is a novel chemosynthetic small interfering RNA that inhibits PCSK9 synthesis.
Zhaoping Wang, Xiangyu Chen, Jingxing Liu, Yingcui Wang, Suhua Zhang   +4 more
doaj   +1 more source

Statistical Mechanics of Two-dimensional Foams [PDF]

, 2010
The methods of statistical mechanics are applied to two-dimensional foams under macroscopic agitation. A new variable -- the total cell curvature -- is introduced, which plays the role of energy in conventional statistical thermodynamics. The probability
Aste T., Boué L., Chiu S. N., Davison L., Fortes M. A., Glazier J. A., Hilgenfeldt S., Landau L. D., M. Durand, Morgan F., Quilliet C., Reif F., Rivier N., Schliecker G., Vaz M. F., Weaire D. L., Weaire D. L.   +16 more
core   +5 more sources

Foam: A General purpose Monte Carlo Cellular Algorithm [PDF]

, 2002
A general-purpose, self-adapting Monte Carlo (MC) algorithm implemented in the program {\tt Foam} is described. The high efficiency of the MC, that is small maximum weight or variance of the MC weight is achieved by means of dividing the integration ...
de Doncker, de Doncker, Jadach, Kawabata, Lepage, Ohl   +5 more
core   +3 more sources

Fatigue of Closed Cell Foams

Journal of Sandwich Structures & Materials, 2005
The static properties of foams scale with relative density and scaling can be obtained through various static tests. The same scaling appears to be valid for both crack propagation rates and fatigue properties of the foams. This implies that, once the fatigue behavior of one relative density foam is established, one can predict the fatigue behavior of
Zenkert, Dan, Shipsha, Andrey, Burman, Magnus   +2 more
openaire   +5 more sources

Pathogenic mycobacterium upregulates cholesterol 25-hydroxylase to promote granuloma development via foam cell formation

iScience
Summary: Pathogenic mycobacteria orchestrate the complex cell populations known as granuloma that is the hallmark of tuberculosis. Foam cells, a lipid-rich cell-type, are considered critical for granuloma formation; however, the causative factor in foam ...
Shuang Zhou, Ding Zhang, Dan Li, Hankun Wang, Cairong Ding, Jingrui Song, Weifeng Huang, Xuan Xia, Ziwei Zhou, Shanshan Han, Zhu Jin, Bo Yan, Jacqueline Gonzales, Laura E. Via, Lu Zhang, Decheng Wang   +15 more
doaj   +1 more source