Hasil untuk "Property"

M. Vogelsberger, S. Genel, V. Springel et al.

Previous simulations of the growth of cosmic structures have broadly reproduced the ‘cosmic web’ of galaxies that we see in the Universe, but failed to create a mixed population of elliptical and spiral galaxies, because of numerical inaccuracies and incomplete physical models. Moreover, they were unable to track the small-scale evolution of gas and stars to the present epoch within a representative portion of the Universe. Here we report a simulation that starts 12 million years after the Big Bang, and traces 13 billion years of cosmic evolution with 12 billion resolution elements in a cube of 106.5 megaparsecs a side. It yields a reasonable population of ellipticals and spirals, reproduces the observed distribution of galaxies in clusters and characteristics of hydrogen on large scales, and at the same time matches the ‘metal’ and hydrogen content of galaxies on small scales.

D. Elias, R. Nair, T. Mohiuddin et al.

Although graphite is known as one of the most chemically inert materials, we have found that graphene, a single atomic plane of graphite, can react with atomic hydrogen, which transforms this highly conductive zero-overlap semimetal into an insulator. Transmission electron microscopy reveals that the obtained graphene derivative (graphane) is crystalline and retains the hexagonal lattice, but its period becomes markedly shorter than that of graphene. The reaction with hydrogen is reversible, so that the original metallic state, the lattice spacing, and even the quantum Hall effect can be restored by annealing. Our work illustrates the concept of graphene as a robust atomic-scale scaffold on the basis of which new two-dimensional crystals with designed electronic and other properties can be created by attaching other atoms and molecules.

Siegfried Haussühl

1. Fundamentals. 2. Sample Preparation. 3. Definitions. 4. Special Tensors. 5. Thermodynamic Relationships. 6. Non-Tensorial Properties. 7. Structure and Properties. 8. Group Theoretical Methods. 9. Group Algebra Projection Operators. 10. Concluding Remarks. 11. Exercises. 12. Appendix.

K. Kobe

T. Ferguson

C. Cambardella, T. Moorman, T. Parkin et al.

E. Ziegel, E. Lehmann, G. Casella

R. H. Brooks, A. Corey

M. Bartlett

M. Hess, P. Koepke, I. Schult

F. Zajac

Y. Fung, R. Skalak

R. Remillard, J. McClintock

AbstractWe review the properties and behavior of 20 X-ray binaries that contain a dynamically-confirmed black hole, 17 of which are transient systems. During the past decade, many of these transien...

Kibeom Lee, M. Ashton

G. Wilk, R. Wallace, J. Anthony

Zhong Lin Wang

M. Treacy, T. Ebbesen, J. Gibson

G. Schatz, K. Kelly, E. Coronado et al.

C. Rice-evans, N. Miller, G. Paganga

J. L. Abascal, C. Vega