Results 21 to 30 of about 272,169 (104)

Magnetized Ekman Layer and Stewartson Layer in a Magnetized Taylor-Couette Flow

, 2008
In this paper we present axisymmetric nonlinear simulations of magnetized Ekman and Stewartson layers in a magnetized Taylor-Couette flow with a centrifugally stable angular-momemtum profile and with a magnetic Reynolds number below the threshold of ...
A. S. Gupta, E. P. Velikhov, J. Goodman, R. Hollerbach, R. Hollerbach, S. Chandrasekhar, T. Couette, T. Von Kármán, V. Pariev, Wei Liu   +9 more
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Design and analysis of SRR based metamaterial loaded circular patch multiband antenna for satellite applications

ICT Express
Satellite communication has reached a turning point in transmitting data quickly and receiving signals clearly in faraway places. This paper presents a metamaterial-based antenna for distant and military applications that overcomes restrictions and ...
Anitha V.R., SatheeshKumar Palanisamy, Osamah Ibrahim Khalaf, Sameer Algburi, Habib Hamam   +4 more
doaj   +1 more source

Self-gravitating warped discs around supermassive black holes

, 2009
We consider warped equilibrium configurations for stellar and gaseous disks in the Keplerian force-field of a supermassive black hole, assuming that the self-gravity of the disk provides the only acting torques.
A. Ulubay-Siddiki, Arnaboldi, Bardeen, Bartko, Binney, Binney, Caproni, Caproni, Gallimore, Genzel, Genzel, Ghez, Goldreich, Goldstein, Goodman, Greenhill, Greenhill, Greenhill, Herrnstein, Herrnstein, Herrnstein, Hobbs, Hofner, Hunter, Jiang, Kuijken, Lai, Lense, Lu, M. Arnaboldi, Maloney, Martin, Miyoshi, Natarajan, Nayakshin, Nelson, Nenkova, O. Gerhard, Papaloizou, Paumard, Petterson, Phinney, Pringle, Pringle, Pringle, Sparke, Sparke, Sparke, Toomre, Touma, Wu   +50 more
core   +1 more source

Slow modes in Keplerian disks

, 2000
Low-mass disks orbiting a massive body can support "slow" normal modes, in which the eigenfrequency is much less than the orbital frequency. Slow modes are lopsided, i.e., the azimuthal wavenumber m=1.
Miller R. H., Scott Tremaine
core   +2 more sources

Fractal Generalized Zone Plates [PDF]

, 2008
The construction of fractal generalized zone plates (FraGZPs) from a set of periodic diffractive optical elements with circular symmetry is proposed. This allows us to increase the number of foci of a conventional fractal zone plate (FraZP), keeping the ...
Bottema, Cavalieri, Dai, Davis, Davis, Dong, Furlan, Gladys Mínguez-Vega, Jesús Lancis, Juan A. Monsoriu, Mendoza-Yero, Mendoza-Yero, Mercedes Fernández-Alonso, Monsoriu, Monsoriu, Ni, Omel Mendoza-Yero, Saavedra, Sakdinawat, Shi, Tao, Vicent Climent, Waldman, Wang, Zheng   +24 more
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Fluctuation Superconductivity in Mesoscopic Aluminum Rings

, 2009
Fluctuations are important near phase transitions, where they can be difficult to describe quantitatively. Superconductivity in mesoscopic rings is particularly intriguing because the critical temperature is an oscillatory function of magnetic field ...
Berger, H. Bluhm, K. A. Moler, Lau, Liu, M. E. Huber, N. C. Koshnick   +6 more
core   +1 more source

Dust Distribution in Gas Disks. A Model for the Ring Around HR 4796A [PDF]

, 2000
There have been several model analyses of the near and mid IR flux from the circumstellar ring around HR4796A. In the vicinity of a young star, the possibility that the dust ring is embedded within a residual protostellar gas disk cannot be ruled out. In
Augereau J. C., Burkert A., D. N. C. Lin, Gustafson B., H. Hubertus Klahr, Hellyer B., Korycansky D. G., Lin D. N. C., Lynden-Bell D., Preibisch T., Shakura N. I., Weidenschilling S. J.   +11 more
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Secular Evolution and the Formation of Pseudobulges in Disk Galaxies

, 2004
We review internal processes of secular evolution in galaxy disks, concentrating on the buildup of dense central features that look like classical, merger-built bulges but that were made slowly out of disk gas. We call these pseudobulges. As an existence
Arp H, Arsenault R, Athanassoula E, Barbuy B, Bender R, Bender R, Bertin G, Bettoni D, Bica E, Bica E, Binggeli B, Binggeli B, Binney J, Binney J, Block DL, Bosma A, Bosma A, Braine J, Bresolin F, Brinchmann J, Buta R, Buta R, Carollo CM, Combes F, Combes F, Combes F, Contopoulos G, Contopoulos G, de Carvalho RR, de Jong RS, de Jong RS, de Jong RS, de Souza RE, de Vaucouleurs G, de Vaucouleurs G, Fall SM, Feltzing S, Friedli D, Friedli D, Friedli D, Gao Y, García-Barreto JA, García-Burillo S, Gerin M, Gerin M, Graham A, Hummel E, Jarvis BJ, Jogee S, Jogee S, John Kormendy, Kennicutt RC, Kormendy J, Kormendy J, Kormendy J, Lauberts A, Lauer TR, Lindblad B, Lindblad B, Lindblad PAB, Lütticke R, Martinet L, Merrifield MR, Mihalas D, Morgan WW, Möllenhoff C, Nilson P, Noguchi N, Pfenniger D, Pfenniger D, Pfenniger D, Phillips AC, Prendergast KH, Robert C. Kennicutt, Saglia RP, Sandage A, Sandage A, Sandage A, Sandage A, Schmidt AA, Scorza C, Seifert W, Sellwood JA, Shaw M, Shaw M, Shaw MA, Shen J, Sparke LS, Sérsic JL, Trager SC, van der Kruit PC, van der Kruit PC, van der Kruit PC, van der Kruit PC, van Driel W, Wozniak H   +95 more
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Microspora (protozoa) en Simullidae y ultraestructura de Polydispyrenia simulii y polydispyrenia sp. nov. parásitos en simulidos de los andes colombianos

Caldasia, 1993
We describe the ultrastructure of two microsporidia parasites of simuliids of the region of La Calera (2.950 m alt.), near Bogotá. Polydispyrenia simulii was found infecting larvae of Simulium ignescens and Polydispyrenia norandina sp.
Torres Fernández Orlando, Muñoz de Hoyos Paulina, Romero de Pérez Gloria   +2 more
doaj  

Mid-infrared Galaxy Morphology from the Spitzer Survey of Stellar Structure in Galaxies (S^4G): The Imprint of the De Vaucouleurs Revised Hubble-Sandage Classification System at 3.6 μm [PDF]

, 2010
Spitzer Space Telescope Infrared Array Camera imaging provides an opportunity to study all known morphological types of galaxies in the mid-IR at a depth significantly better than ground-based near-infrared and optical images.
Aravena, Manuel, Athanassoula, E., Bosma, Albert, Buta, Ronald J., Comerón, Sebastien, Elmegreen, Debra M., Gadotti, Dimitri A., Gil de Paz, Armando, Hinz, Joannah L., Ho, Luis C., Kim, Taehyun, Knapen, Johan H., Laurikainen, Eija, Madore, Barry F., Masters, Karen L., Menéndez-Delmestre, Karin, Munoz-Mateos, Juan-Carlos, Regan, Michael, Salo, Heikki, Seibert, Mark, Sheth, Kartik   +20 more
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