Results 91 to 100 of about 689,866 (345)

Gravitational hydrodynamics of large scale structure formation [PDF]

, 2009
The gravitational hydrodynamics of the primordial plasma with neutrino hot dark matter is considered as a challenge to the bottom-up cold dark matter paradigm.
Aguirre A. N., Alcock C., Binney J., C. H. Gibson, Cover K. S., de Groot S. R., Dunkley J., Elmegreen D. M., Gibson C. H., Gibson C. H., Gibson C. H., Gibson C. H. Schild R. E., Meaburn J., Metz M., Nieuwenhuizen Th. M., Ouchi M., R. E. Schild, Rudnick L., Sylos Labini F. Vasilyev N. L. Baryshev Yu V., Th. M. Nieuwenhuizen, Weinberg S.   +20 more
core   +2 more sources

High‐Temperature Oxidation of the CrFeNi Medium‐Entropy Alloy

Advanced Engineering Materials, EarlyView.
The oxidation behavior of equiatomic CrFeNi MEA is a key issue that determines this material's suitability for high‐temperature application. The understanding of long‐term behavior is even more crucial than short‐term corrosion effects. The alloy is exposed to synthetic air at 1000, 1050, and 1100 °C for 24, 100, and 1000 h and systematically compared ...
Anna Maria Manzoni, Wencke Mohring, Mike Schneider, Guillaume Laplanche, Sebastian Peter Hagen, Christiane Stephan‐Scherb   +5 more
wiley   +1 more source

A Single Scale Theory for Cold and Hot Dark Matter

, 1994
We show that a recently proposed extension of the MSSM can provide a scenario where both the cold and hot dark matter of the universe owe their origin to a single scale connected with the breakdown of the global B-L symmetry.
A. Klypin, A. Riotto, E. Chun, E. Wright, G. Efstathiou, G. F. Giudice, G. F. Smoot, G. Steigman, H. E. Haber, H. Nilles, J. A. Holtzman, J. Cline, J. Schecter, K. Griest, M. Davis, M. Davis, M. Davis, M. Kawasaki, M. Shirashi, Q. Shafi, R. Cowsik, R. K. Shaefer, R. N. Mohapatra, R. N. Mohapatra, Y. Chikashige   +24 more
core   +1 more source

Direct Recycling of Cold Work Tool Steel Swarf into New Cutting Disks via Field‐Assisted Sintering

Advanced Engineering Materials, EarlyView.
Through a sintering method known as field‐assisted sintering technology/spark plasma sintering, cold work tool steel swarf can be directly recycled into new cutting disks. This method is capable of densifying the unconventional powder morphology of swarf, and it can also seal grinding contaminants, such as Al2O3, into the steel matrix.
Monica Keszler, Felix Großwendt, Olivier Guillon, Sebastian Weber, Martin Bram   +4 more
wiley   +1 more source

Testing alternative theories of gravity by fitting the hot-spot data of Sgr A*

European Physical Journal C: Particles and Fields, 2022
We are fitting dynamics of electrically neutral hot-spot orbiting around Sagittarius A* (Sgr A*) source in Galactic center, represented by various modifications of the standard Kerr black hole (BH), to the three flares observed by the GRAVITY instrument ...
Misbah Shahzadi, Martin Kološ, Zdeněk Stuchlík, Yousaf Habib   +3 more
doaj   +1 more source

Is the Lambda CDM Model Consistent with Observations of Large-Scale Structure?

, 2000
The claim that large-scale structure data independently prefers the Lambda Cold Dark Matter model is a myth. However, an updated compilation of large-scale structure observations cannot rule out Lambda CDM at 95% confidence. We explore the possibility of
AE Evrard, E Gawiser, H Lin, H Tadros, J Robinson, LN Costa Da, NA Bahcall, PM Garnavich, PTP Viana, S Buries, S Perlmutter, T Kolatt, W Hu   +12 more
core   +2 more sources

Production of Metallic Foam Precursors Using Current‐Activated Pressure‐Assisted Densification

Advanced Engineering Materials, EarlyView.
A powder compaction metallurgical method, known as current‐activated pressure‐assisted densification, is applied to enhance the compaction of metal foam precursors. This method improves precursor quality by achieving higher density, lower electrical resistivity, and more uniform pore nucleation in the resulting foams, reducing energy consumption and ...
Tillmann Robert Neu, Paul Hans Kamm, Francisco García‐Moreno   +2 more
wiley   +1 more source

Are the Galaxies with Indefinitely Flat Circular Velocities Located Inside Large Dark Matter Haloes?

Universe
A recent study using weak gravitational lensing revealed that the rotation curves of some isolated galaxies are found at a very large distance from their galactic centres. This may provide strong evidence supporting Modified Newtonian Dynamics (MOND) and
Man Ho Chan, Yangzhanhao Zhang, Antonino Del Popolo   +2 more
doaj   +1 more source

Axion dark matter and the Lattice

EPJ Web of Conferences, 2018
First I will review the QCD theta problem and the Peccei-Quinn solution, with its new particle, the axion. I will review the possibility of the axion as dark matter.
Moore Guy
doaj   +1 more source

Improved Strength and Corrosion Resistance of Ti–50Zr Alloy Through Heat Treatment

Advanced Engineering Materials, EarlyView.
This work systematically analyzes the effects of heat treatment on mechanical properties and corrosion behavior of Ti‐50Zr alloy produced via vacuum arc melting. Microstructure transforms from coarse lamellar α phase in as‐cast condition to fine and uniformly distributes acicular α′ phase in heat‐treatment state.
Yuhua Li, Qian Zhang, Rong Zhao, Haojie Wang, Yujing Liu, Zibo Zhao, Chengliang Yang, Lai‐Chang Zhang   +7 more
wiley   +1 more source