Results 21 to 30 of about 354,066 (197)

Theoretical and numerical characterization of a 40 Gbps long-haul multi-channel transmission system with dispersion compensation

Digital Communications and Networks, 2015
When updating the 10 Gbps optical transmission system to 40 Gbps, the main limits are chromatic dispersion, nonlinear effect, especially the interactions of dispersion and intra-channel nonlinearity.
Kaikai Xu, Yang Ou
doaj   +1 more source

Stellar population gradients in brightest cluster galaxies [PDF]

, 2012
We present the stellar population and velocity dispersion gradients for a sample of 24 brightest cluster galaxies (BCGs) in the nearby Universe for which we have obtained high quality long-slit spectra at the Gemini telescopes.
Bernardi, Bernstein, Bohringer, Bohringer, Brinchmann, Brough, Brough, Brough, Bruzual, Burke, Burstein, Cappellari, Cardiel, Cardiel, Carollo, Carollo, Carter, Carter, Cavagnolo, Chen, Collins, Collins, Conroy, Crawford, David, Davidge, Davidge, Davies, De Lucia, Dubinski, Edge, Edge, Edwards, Faber, Faber, Finoguenov, Fisher, Fisher, Forbes, Fukazawa, Gorgas, Gorgas, Gunn, Hansen, Hashimoto, Hoessel, Ikebe, Jarrett, Katayama, Kawata, Kormendy, Korn, Kuntschner, Kuntschner, Larson, Lauer, Ledlow, Loubser, Loubser, Loubser, Loubser, Mahdavi, Marquardt, Mehlert, Mehlert, Osmond, P. Sánchez-Blázquez, Patel, Peletier, Peres, Peterson, Pipino, Plionis, Postman, S. I. Loubser, Sakelliou, Sandage, Sarzi, Schechter, Sivanandam, Spolaor, Spolaor, Stott, Stott, Struble, Struble, Struble, Sun, Sánchez-Blázquez, Sánchez-Blázquez, Sánchez-Blázquez, Sánchez-Blázquez, Sánchez-Blázquez, Thomas, Thomas, Trager, Trager, Valentinuzzi, Vikhlinin, Von der Linden, Whiley, White, White, Worthey, Worthey   +104 more
core   +3 more sources

Effect of Mixing Condition on Rheological Behavior of Epoxy-Clay Nanocomposites [PDF]

علوم و تکنولوژی پلیمر, 2012
The effect of mixing on rheological behavior of 6% wt epoxy-clay nanocomposites was studied. The mixing processes were carried out by low shear mixer, homogenizer and ultrasonic and combination of different mixing techniques at medium and maximum power ...
Gholamhossein Sodeifian, Hamid Reza Nikooamal, Ali Akbar Yousefi   +2 more
doaj   +1 more source

Improvement of a land fragmentation measurement model based on natural surface elements and road network

Frontiers in Environmental Science, 2022
Land fragmentation is one of the most important factors hindering the mechanization and scale of agriculture. To further alleviate the negative impact of arable land fragmentation, a more accurate model for measuring arable land fragmentation is needed ...
Lanlan Su, Yuluan Zhao, Mingshun Long, Xiubin Li   +3 more
doaj   +1 more source

P wave dispersion and maximum P wave duration are associated with renal outcomes in chronic kidney disease. [PDF]

PLoS ONE, 2014
P wave parameters measured by 12-lead electrocardiogram (ECG) are commonly used as a noninvasive tool to evaluate left atrial enlargement. This study was designed to assess whether P wave parameters were associated with renal outcomes in chronic kidney ...
Jiun-Chi Huang, Shu-Yi Wei, Szu-Chia Chen, Jer-Ming Chang, Chi-Chih Hung, Ho-Ming Su, Shang-Jyh Hwang, Hung-Chun Chen   +7 more
doaj   +1 more source

The IRX-$\beta$ relation: Insights from simulations [PDF]

, 2017
We study the relationship between the UV continuum slope and infrared excess (IRX$\equiv L_{\rm IR}/L_{\rm FUV}$) predicted by performing dust radiative transfer on a suite of hydrodynamical simulations of galaxies.
Ferguson, Henry C., Hayward, Christopher C., Safarzadeh, Mohammadtaher   +2 more
core   +3 more sources

Star Formation-Regulated Growth of Black Holes in Protogalactic Spheroids [PDF]

, 2000
The observed relation between central black hole mass and spheroid velocity dispersion is interpreted in terms of a self-regulation model that incorporates a viscous Keplerian accretion disk to feed the black hole, embedded in a massive, self-gravitating
Andreas Burkert, Duschl W. J., Joseph Silk, Silk J., White S.   +4 more
core   +2 more sources

The Dark Halo - Spheroid Conspiracy and the Origin of Elliptical Galaxies

, 2013
Dynamical modeling and strong lensing data indicate that the total density profiles of early-type galaxies are close to isothermal, i.e., rho_tot ~ r^gamma with gamma approx -2. To understand the origin of this universal slope we study a set of simulated
Burkert, Andreas, Dolag, Klaus, Johansson, Peter H., Naab, Thorsten, Oser, Ludwig, Remus, Rhea-Silvia, Thomas, Jens   +6 more
core   +1 more source

A new circular photonic crystal fiber for effective dispersion compensation over E to L wavelength bands

Journal of Microwaves, Optoelectronics and Electromagnetic Applications
This paper presents a new circular photonic crystal fiber (C-PCF) for effective dispersion compensation covering E to L wavelength bands ranging from 1360-1625 nm.
M. M. Haque, M. S. Rahman, M. Samiul Habib, M. Selim Habib, S. M. A. Razzak   +4 more
doaj   +1 more source

The Evolution of the M-sigma Relation

, 2005
(Abridged) We examine the evolution of the black hole mass - stellar velocity dispersion (M-sigma) relation over cosmic time using simulations of galaxy mergers that include feedback from supermassive black hole growth.
Bondi H., Bondi H., Brant Robertson, Eckart A., Gingold R. A., Hoyle F., Kormendy J., Lars Hernquist, Paul Martini, Philip F. Hopkins, Richstone D., Silk J., Thomas J. Cox, Tiziana Di Matteo, Volker Springel, Wyithe J. S. B.   +15 more
core   +1 more source