Results 51 to 60 of about 97,119 (315)

Towards a Holistic View of the Heating and Cooling of the Intracluster Medium

, 2008
(Abridged) X-ray clusters are conventionally divided into two classes: "cool core" (CC) clusters and "non-cool core" (NCC) clusters. Yet relatively little attention has been given to the origins of this dichotomy and, in particular, to the energetics and
A. Babul, Binney J., Bondi H., Bower R. G., Edge A. C., Fabian A. C., I. G. McCarthy, Johnstone R. M., Kaastra J. S., M. L. Balogh, Mewe R., Neumann D. M., Nulsen P. E. J., R. G. Bower, Roncarelli M.   +14 more
core   +1 more source

Solving the Cooling Flow Problem through Mechanical AGN Feedback [PDF]

, 2012
Unopposed radiative cooling of plasma would lead to the cooling catastrophe, a massive inflow of condensing gas, manifest in the core of galaxies, groups and clusters. The last generation X-ray telescopes, Chandra and XMM, have radically changed our view
Crenshaw, de Plaa, Fabian, Gaspari, Gaspari, Gaspari, Gaspari, Giovannini, Kirkpatrick, McConnell, McDonald, McNamara, Nesvadba, Peterson, Randall, Sun, Tombesi, Vikhlinin   +17 more
core   +1 more source

Low‐Cost, Large‐Scale Nanoporous Metals by Mechanical Alloying, Oxide Reduction, and Dealloying of Powders

Advanced Engineering Materials, EarlyView.
Powder metal processing provides scalable advantages in nanoporous (np) metal development. Mechanical alloying is used to produce unique precursors for hybrid nanopore formation by oxide reduction and dealloying. As demonstrated in np Ag, this approach improves process efficiency while promoting smaller ligaments and larger pores, both of which are ...
Mark A. Atwater, Oliver A. Fowler
wiley   +1 more source

An axisymmetric, hydrodynamical model for the torus wind in AGN [PDF]

, 2008
We report on time-dependent axisymmetric simulations of an X-ray excited flow from a parsec-scale, rotating, cold torus around an active galactic nucleus. Our simulations account for radiative heating and cooling and radiation pressure force.
Dorodnitsyn, A., Kallman, T., Proga, D.
core   +3 more sources

Packaging of Macroscopic Material Payloads: Needs, Challenges, Concepts, and Future Directions

Advanced Engineering Materials, EarlyView.
This review introduces a unified framework that decomposes any macroscopic packaging system into the payload, packaging material, and packaging strategy and combines them into a conceptual packaging equation: packaging strategy = payload + packaging material.
Venkata S. R. Jampani, Manos Anyfantakis
wiley   +1 more source

Integration of daytime radiative cooling and solar heating for year-round energy saving in buildings

Nature Communications, 2020
The heating and cooling energy consumption of buildings accounts for about 15% of national total energy consumption in the United States. In response to this challenge, many promising technologies with minimum carbon footprint have been proposed. However,
Xiuqiang Li, Bowen Sun, Chenxi Sui, Ankita Nandi, Haoming Fang, Yucan Peng, G. Tan, Po‐Chun Hsu   +7 more
semanticscholar   +1 more source

Zein‐Based Adhesives: Sustainable Extraction and Application in Bioadhesive Technologies

Advanced Engineering Materials, EarlyView.
Zein is extracted from corn gluten meal using a simple and scalable process with high yield (~90%). The resulting protein is applied in bioadhesives modified with Ca2+ and Fe3+ ions, exhibiting substrate‐dependent adhesion. The findings demonstrate competitive bonding performance and highlight the role of ionic interactions in tuning adhesion ...
Paula Bertolino Sanvezzo, Daniela Winsley Valereto Friozi, Vinícius de Oliveira, Marcia Cristina Branciforti   +3 more
wiley   +1 more source

Angularly selective thermal emitters for deep subfreezing daytime radiative cooling

Nanophotonics, 2022
We theoretically analyze the impact of angular selectivity on the radiative cooling performance of thermal emitters. We investigate the effect of spectral selectivity, environmental conditions, and parasitic heating on the minimum possible equilibrium ...
Chamoli Sandeep Kumar, Li Wei, Guo Chunlei, ElKabbash Mohamed   +3 more
doaj   +1 more source

Cooling and Heating Functions of Photoionized Gas

, 2012
Cooling and heating functions of cosmic gas are a crucial ingredient for any study of gas dynamics and thermodynamics in the interstellar and intergalactic medium.
Benjamin, Boehringer, Ciotti, Gnat, Haardt, Kravtsov, Landi, Leitherer, Mathis, Nicholas Hollon, Nickolay Y. Gnedin, Ricotti, Santoro   +12 more
core   +1 more source

Influence of Sample Preparation and Processing Procedures on the Thermal Diffusivity of MgO‐C Refractories

Advanced Engineering Materials, EarlyView.
The thermal diffusivity of MgO‐C refractories is highly sensitive to sample preparation and processing procedures. In this article, the effects of coking sequence, machining conditions, structural inhomogeneity, and graphite coating application on measurements using laser flash apparatus are systematically investigated.
Luyao Pan, Rhena Wulf, Till M. J. Stadtmüller, Christos G. Aneziris, Tobias M. Fieback   +4 more
wiley   +1 more source