Results 61 to 70 of about 354,066 (197)

Weighing the QT Intervals with the Slope or the Amplitude of the T Wave

Annals of Noninvasive Electrocardiology, 2001
Objective: The reproducibility of QT interval measurements is low, even for the mean QT interval based on the standard ECG. In this study we analyzed whether the reproducibility of the mean weighed QT interval was better than the simple mean QT interval.
Kaspar Lund, Hans Nygaard, Anders Kirstein Pedersen   +2 more
doaj   +1 more source

A Tunable Dispersion Waveguide Based on Graphene–Silicon Lateral Slot Geometric Structure

IEEE Photonics Journal, 2017
The dispersion profiles of a hybrid graphene–silicon (HyGS) slot waveguide with trilayers of graphene are investigated in this paper. By tuning the bias voltage on graphene layer, the zero dispersion wavelengths (ZDW) of HyGS slot waveguide can be
Zhen Li, Hongjun Liu, Nan Huang, Zhaolu Wang, Jing Han   +4 more
doaj   +1 more source

Improvement of Optical Properties in Hexagonal Index-guiding Photonic Crystal Fiber for Optical Communications [PDF]

Mathematics Interdisciplinary Research, 2017
Waveguides with low confinement loss, low chromatic dispersion, and low nonlinear effects are used in optical communication systems. Optical fibers can also be employed in such systems.
Saeed Olyaee, Mahmood Seifouri, Ali Nikoosohbat   +2 more
doaj   +1 more source

Intrabeam scattering analysis of measurements at KEK's ATF damping ring [PDF]

, 2002
We derive a simple relation for estimating the relative emittance growth in x and y due to intrabeam scattering (IBS) in electron storage rings. We show that IBS calculations for the ATF damping ring, when using the formalism of Bjorken-Mtingwa, a ...
A. Piwinski, A. W. Chao, C. Bhat, C. H. Kim, C. Steier, G. Parzen, H. Hayano, J. D. Bjorken, J. Le Duff, J. Urakawa, J. Urakawa, J. Wei, J. Wei, K. Kubo, K. Kubo, K. Kubo, K. L. F. Bane, L. Evans, M. Conte, M. Venturini, R. Farouki, T. Naito, T. Okugi, T. Raubenheimer, W. Fischer, Y.-N. Rao   +25 more
core   +3 more sources

The Sloan Lens ACS Survey. VII. Elliptical Galaxy Scaling Laws from Direct Observational Mass Measurements

, 2008
We use a sample of 53 massive early-type strong gravitational lens galaxies with well-measured redshifts (ranging from z=0.06 to 0.36) and stellar velocity dispersions (between 175 and 400 km/s) from the Sloan Lens ACS (SLACS) Survey to derive numerous ...
Adam S. Bolton, Auger M. W., Bender R., Bertin G., Binney J., Binney J., Caon N., Cappellari M., Ciotti L., D'Onofrio M., David J. Schlegel, Gerhard O. E., Graham A., Guzman R., Jorgensen I., Jorgensen I., Kormann R., Kuijken K., Leonidas A. Moustakas, Lewis G. F., Lewis G. F., Léon V. E. Koopmans, Randall Wayth, Raphaël Gavazzi, Rix H.-W., Scott Burles, Seitz C., Tommaso Treu, van der Marel R. P., van Dokkum P. G., Wisotzki L., Wisotzki L., Wisotzki L.   +32 more
core   +3 more sources

A Numerical Investigation of the Relationship Between Air Quality, Topography, and Building Height in Populated Hills

Buildings
Urban population growth has led to increased air pollution, influenced by disrupted wind patterns and the heterogeneous distribution of pollutants. Although the relationship between urban form and air quality is well recognized, it is often examined in ...
Marian Montalvo, Daniel Horna
doaj   +1 more source

Path integral Monte Carlo simulation of helium at negative pressures

, 1999
Path integral Monte Carlo (PIMC) simulations of liquid helium at negative pressure have been carried out for a temperature range from the critical temperature to below the superfluid transition.
A. Guirao, C. E. Campbell, D. M. Ceperley, D. M. Ceperley, David M. Ceperley, E. L. Pollock, E. L. Pollock, F. Dalfovo, Gregory H. Bauer, H. J. Maris, H. J. Maris, H. J. Maris, H. J. Maris, H. J. Maris, H. Lambaŕe, J. Boronat, J. Boronat, J. Classen, J. Classen, J. S. Brooks, M. A. Solís, M. Boninsegni, M. C. Gordillo, M. S. Pettersen, Min-Chul Cha, Nigel Goldenfeld, P. Grüter, R. A. Aziz, R. J. Donnelly, S. Balibar, S. Balibar, S. C. Hall, S. C. Hall   +32 more
core   +1 more source

Kinks in the dispersion of strongly correlated electrons

, 2006
The properties of condensed matter are determined by single-particle and collective excitations and their interactions. These quantum-mechanical excitations are characterized by an energy E and a momentum \hbar k which are related through their ...
A Bostwick, A Georges, A Lanzara, A Menzel, AA Abrikosov, D. Vollhardt, E Rotenberg, F Ronning, G Kotliar, H He, H Iwasawa, H-B Yang, I. A. Nekrasov, IA Nekrasov, J Hwang, J Schäfer, K. Byczuk, K. Held, M Hengsberger, M Higashiguchi, M. Kollar, R Bulla, T Valla, T Yoshida, Th Pruschke, Th. Pruschke, W Metzner, Y Aiura, Y.-F. Yang, Z Sun, Z-X Shen   +30 more
core   +1 more source

On the Origin of the Variety of Velocity Dispersion Profiles of Galaxies

The Astrophysical Journal
Observed and simulated galaxies exhibit a significant variation in their velocity dispersion profiles. We examine the inner and outer slopes of stellar velocity dispersion profiles using integral field spectroscopy data from two surveys, SAMI (for z < 0 ...
San Han, Sukyoung K. Yi, Sree Oh, Mina Pak, Scott Croom, Julien Devriendt, Yohan Dubois, Taysun Kimm, Katarina Kraljic, Christophe Pichon, Marta Volonteri   +10 more
doaj   +1 more source

Landau levels in quasicrystals

, 2018
Two-dimensional tight-binding models for quasicrystals made of plaquettes with commensurate areas are considered. Their energy spectrum is computed as a function of an applied perpendicular magnetic field.
Fuchs, Jean-Noël, Mosseri, Rémy, Vidal, Julien   +2 more
core   +1 more source