Results 91 to 100 of about 4,538 (207)

On the galactic spin of barred disk galaxies

, 2013
We present a study of the connection between the galactic spin parameter $\lambda_{d}$ and the bar fraction in a volume-limited sample of 10,674 disk galaxies drawn from the Sloan Digital Sky Survey Data Release 7. The galaxies in our sample are visually
Cervantes-Sodi, Bernardo, Li, Cheng, Park, Changbom, Wang, Lixin   +3 more
core   +1 more source

A Hybrid Deep Learning Architecture for Enhanced Vertical Wind and FBAR Estimation in Airborne Radar Systems

Aerospace
Accurate prediction of the F-factor averaged over one kilometer (FBAR), a critical wind shear metric, is essential for aviation safety. A central F-factor is used to compute FBAR.
Fusheng Hou, Guanghui Sun
doaj   +1 more source

Scandium Aluminium Nitride-Based Film Bulk Acoustic Resonators

Proceedings, 2017
Film bulk acoustic resonators (FBAR) are promising candidates to replace surface acoustic wave devices as filters or delay lines, but also offer exciting opportunities as biological or gas sensors. In this work, solidly mounted FBARs were manufactured by
Michael Schneider, Mario DeMiguel-Ramos, Andrew J. Flewitt, Enrique Iborra, Ulrich Schmid   +4 more
doaj   +1 more source

Barred Galaxies in the Coma Cluster

, 2010
We use ACS data from the HST Treasury survey of the Coma cluster (z~0.02) to study the properties of barred galaxies in the Coma core, the densest environment in the nearby Universe.
Balcells, M., C. Ferguson, H., Carter, D., den Brok, M., Erwin, P., Goudfrooij, P., Green, J.D., Guzmán, R., Hai, L., Hammer, D., Hoyos, C., Jogee, S., Mao, Y., Marinova, I., Peletier, R.F., Peng, E., Stanford, L.M., Trentham, N., V. Kleijn, G., W. Graham, A., Weinzirl, T.   +20 more
core   +1 more source

Optimization of a VOC Sensor with a Bilayered Diaphragm Using FBAR as Strain Sensing Elements

Sensors, 2017
Film bulk acoustic resonators (FBARs) are widely applied in mass bio-sensing and pressure sensors, owing to their extreme sensitivity and integration ability, and ability to miniaturize circuits.
Huihui Guo, Aohui Guo, Yang Gao, Tingting Liu   +3 more
doaj   +1 more source

Compact Intrinsically Switchable FBAR Filters Utilizing Ferroelectric BST

IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control, 2018
Intrinsically switchable thin film bulk acoustic resonator (FBAR) filters based on ferroelectric barium strontium titanate (BST) are presented. A 1.5-stage -network intrinsically switchable FBAR filter unit cell with a 3-dB fractional bandwidth of 3% at 2 GHz is systematically designed, simulated, and fabricated. The minimum insertion loss (IL) for the
Milad Zolfagharloo Koohi, Seungku Lee, Amir Mortazawi   +2 more
openaire   +2 more sources

The Distribution of Bar and Spiral Strengths in Disk Galaxies

, 2005
The distribution of bar strengths in disk galaxies is a fundamental property of the galaxy population that has only begun to be explored. We have applied the bar/spiral separation method of Buta, Block, and Knapen to derive the distribution of maximum ...
Aguerri J. A. L., Athanassoula E., Block D. L., Chapelon S., de Vaucouleurs G., E. Laurikainen, Firmani C., H. Salo, Martinet L., Merrifield M. R., Noguchi M., Persic M., R. Buta, S. Vasylyev, Sellwood J. A., Wozniak H.   +15 more
core   +2 more sources

The cluster gas mass fraction as a cosmological probe: a revised study

, 2009
(Abriged) We present the analysis of the baryonic content of 52 X-ray luminous galaxy clusters observed with Chandra in the redshift range 0.3-1.273. We use the deprojected X-ray surface brightness profiles and the measured values of the gas temperature ...
A. Morandi, Allen, Allen, Allen, Anders, Arnaud, Balestra, Caldwell, Carroll, Castillo-Morales, David, Dolag, Ettori, Ettori, Ettori, Ettori, Ettori, Ettori, Evrard, F. Terenziani, Freedman, Frenk, Fukugita, Gonzalez, Hannestad, I. Balestra, Kravtsov, L. Lovisari, Lagana, Lin, Lin, Linder, Markevitch, Mathiesen, Maughan, McCarthy, Mohr, Murante, Murante, Navarro, P. Rosati, P. Tozzi, Peebles, Rapetti, Rapetti, Rines, Rosati, Roussel, S. Borgani, S. Ettori, Sadat, Sandage, Santos, Sasaki, Spergel, Spergel, Stanford, Steigman, Strazzullo, Turner, Vikhlinin, Voevodkin, Wang, White, White   +64 more
core   +1 more source

Dynamical bar-mode instability in rotating and magnetized relativistic stars

, 2013
We present three-dimensional simulations of the dynamical bar-mode instability in magnetized and differentially rotating stars in full general relativity.
De Pietri, Roberto, Dionysopoulou, Kyriaki, Franci, Luca, Rezzolla, Luciano   +3 more
core   +1 more source

МКЭ-моделирование FBAR-резонаторов

Вестник Нижегородского университета им. Н.И. Лобачевского, 2014
The article presents a numerical computation technique to calculate acoustoelectronic single-frequency HF thinfilm resonators based on the numerical solution of 3D piezoacoustic equations by the finite element method (FEM). The frequency dependence of FBAR admittance has been obtained.
openaire   +1 more source