Results 151 to 160 of about 675,630 (383)

The Evolution of Galaxy Groups and of Galaxies Therein [PDF]

, 2007
Properties of groups of galaxies depend sensitively on the algorithm for group selection, and even the most recent catalogs of groups built from redshift-space selection should suffer from projections and infalling galaxies. The cosmo-dynamical evolution of groups from initial Hubble expansion to collapse and virialization leads to a fundamental track (
openaire   +4 more sources

Multitarget Recognition of Flower Images Based on Lightweight Deep Neural Network and Transfer Learning

Advanced Intelligent Systems, EarlyView.
This article proposes a lightweight YOLOv4‐based detection model using MobileNetV3 or CSPDarknet53_tiny, achieving 30+ FPS and higher mAP. It also presents a ShuffleNet‐based classification model with transfer learning and GAN‐augmented images, improving generalization and accuracy.
Qingyang Liu, Yanrong Hu, Hongjiu Liu
wiley   +1 more source

Properties of bars in the local universe

, 2008
We studied the fraction and properties of bars in a sample of about 3000 galaxies extracted from SDSS-DR5. This represents a volume limited sample with galaxies located between redshift 0.01-20, and inclination i < 60.
Aguerri, J. A. L., Corsini, E. M., Méndez-Abreu, J.   +2 more
core  

Compact E+A Galaxies as a Progenitor of Massive Compact Quiescent Galaxies at 0.2

, 2016
We search the Sloan Digital Sky Survey and the Baryon Oscillation Sky Survey to identify ~5500 massive compact quiescent galaxy candidates at 0 ...
Chillingarian, Igor, Damjanov, Ivana, Geller, Margaret J., Hochmuth, Nicholas Baeza, Hwang, Ho Seong, Salmi, Fadia, Sohn, Jubee, Zahid, H. Jabran   +7 more
core   +1 more source

Cool Gas in High-Redshift Galaxies [PDF]

, 2013
Over the past decade, observations of the cool interstellar medium (ISM) in distant galaxies via molecular and atomic fine structure line (FSL) emission have gone from a curious look into a few extreme, rare objects to a mainstream tool for studying ...
C. Carilli, F. Walter
semanticscholar   +1 more source

AI in Neurology: Everything, Everywhere, all at Once PART 2: Speech, Sentience, Scruples, and Service

Annals of Neurology, EarlyView.
Artificial intelligence (AI) applications are finding use in real‐world neurological settings. Whereas part 1 of this 3‐part review series focused on the birth of AI and its foundational principles, this part 2 review shifts gears to explore more practical aspects of neurological care.
Matthew Rizzo
wiley   +1 more source

A Possible Origin of Magnetic Fields in Galaxies and Clusters: Strong Magnetic fields at z~10?

, 2005
We propose that strong magnetic fields should be generated at shock waves associated with formation of galaxies or clusters of galaxies by the Weibel instability, an instability in collisionless plasmas.
Fujita, Yutaka, Kato, Tsunehiko N.
core   +1 more source

Detection of high Lyman continuum leakage from four low-redshift compact star-forming galaxies [PDF]

, 2016
Following our first detection reported in Izotov et al. (2016), we present the detection of Lyman continuum (LyC) radiation of four other compact star-forming galaxies observed with the Cosmic Origins Spectrograph (COS) onboard the Hubble Space Telescope
Y. Izotov, D. Schaerer, T. Thuan, G. Worseck, N. Guseva, I. Orlitová, A. Observatory, Ukrainian National Academy of Sciences, Kyiv, Ukraine, Observatoire de Geneve, Versoix, Switzerland., Irapcnrs, Toulouse, France., A. Department, U. Virginia, Charlottesville, Usa, M. Astronomie, Heidelberg, H Germany, A. Institute, C. A. O. Sciences, Prague, Czech Republic   +26 more
semanticscholar   +1 more source

Usage of the term provenance in LIS literature: An Annual Review of Information Science and Technology (ARIST) paper

Journal of the Association for Information Science and Technology, EarlyView.
Abstract Provenance is the story of how something has come to be. In this paper, we provide a systematic literature review to categorize the various notions of provenance in Information Sciences. The goal of this review is to paint a broader picture of the multiple uses of provenance at play and to enhance our understanding of the importance of ...
Rhiannon Bettivia, Yi‐Yun Cheng, Michael R. Gryk   +2 more
wiley   +1 more source

The hierarchical formation of the brightest cluster galaxies [PDF]

, 2006
We use semi-analytic techniques to study the formation and evolution of brightest cluster galaxies (BCGs). We show the extreme hierarchical nature of these objects and discuss the limitations of simple ways to capture their evolution.
G. Lucia, J. Blaizot
semanticscholar   +1 more source