Results 51 to 60 of about 195,388 (199)

Determining the extragalactic extinction law with SALT

, 2008
We present CCD imaging observations of early-type galaxies with dark lanes obtained with the Southern African Large Telescope (SALT) during its performance-verification phase.
Alexei Y. Kniazev, Bertola, Bertola, Biermann, Bohren, Brosch, Brosch, Brosch, Brosch, Brosch, Bruzual, Buckley, Calzetti, Cardelli, Cardelli, Darragh O'Donoghue, David A. H. Buckley, de Souza, de Vaucouleurs, de Vaucouleurs, Debye, Dewangan, Draine, Draine, Draine, Draine, Ebneter, Emsellem, Encarni Romero-Colmenero, Falco, Ferrari, Gordon, Goudfrooij, Goudfrooij, Greenberg, Greenberg, Greenberg, Hawarden, Hildebrand, Ido Finkelman, Knapen, Knapp, La Barbera, Li, Li, Martin Still, Mathis, Mathis, Mie, Nandy, Nicola Loaring, Noah Brosch, O'Donoghue, Ostman, Patil, Patil, Petri Väisänen, Ramotholo Sefako, Rudnick, Sahu, Savage, Steenman, Steenman, Temi, Tomita, Tran, Trumpler, Valencic, van de Hulst, van Dokkum, Véron-Cetty, Walterbos, Witt, Yas Hashimoto, Young   +74 more
core   +2 more sources

Continuity and Darwinism—Natural Selection, Extinction, or Adaptation [PDF]

Journal of Graduate Medical Education, 2015
A paper by Francis and colleagues1 in this issue of the Journal, as well as other recent articles evaluating the effects of various models of “continuity clinics” on patient and resident satisfaction, remind me of Darwin's descriptions of the natural selection and extinction or adaptation of species.
openaire   +2 more sources

Starburst Galaxies: Why the Calzetti Dust Extinction Law?

, 2003
The empirical reddening function for starburst galaxies generated by Calzetti and her co-workers has proven very successful, and is now used widely in the observational literature. Despite its success, however, the physical basis for this extinction law,
Buat V., Combes F., Jrg Fischera, Madau P., Michael A. Dopita, Ralph S. Sutherland, Shostak G. S., van der Kruit P. C.   +7 more
core   +2 more sources

The Extinction Properties of and Distance to the Highly Reddened Type Ia Supernova SN 2012cu [PDF]

, 2017
Correction of Type Ia Supernova brightnesses for extinction by dust has proven to be a vexing problem. Here we study the dust foreground to the highly reddened SN 2012cu, which is projected onto a dust lane in the galaxy NGC 4772.
A. G. Kim, A. Stocker, B. Hayden, C. Baltay, C. Buton, C. Saunders, C. Sofiatti, C. Tao, D. Baugh, D. Fouchez, D. Rabinowitz, D. Rubin, E. Gangler, E. Pecontal, G. Aldering, G. Smadja, H. K. Fakhouri, J. Chen, J. Nordin, K. Barbary, K. Boone, K. Runge, M. Kowalski, M. Rigault, N. Chotard, N. Suzuki, null null, P. Antilogus, P. Fagrelius, P.-F. Leget, R. C. Thomas, R. Pain, R. Pereira, S. Bailey, S. Bongard, S. Lombardo, S. Perlmutter, S. Taubenberger, U. Feindt, W. Hillebrandt, X. Huang, Y. Copin, Z. Raha   +42 more
core   +5 more sources

Extinctions at 7um and 15um from the ISOGAL survey

, 2005
The extinction laws at 7um and 15um are derived for more than 120 sightlines in the inner Galactic plane based on the ISOGAL survey data and the near-infrared data from DENIS and 2MASS. The tracers are the ISOGAL point sources with [7]-[15]
A. Omont, B. W. Jiang, Belikov, Benjamin, Bertelli, Blommaert, Bronfman, Cardelli, Churchwell, Combes, Dame, Draine, Draine, Epchtein, Epchtein, Epchtein, F. Schuller, G. Simon, Glass, Hennebelle, Indebetouw, J. Gao, Jiang, Landini, Lutz, Mathis, Neckel, Omont, Omont, Omont, Price, Pérault, Rieke, Roche, Rosenthal, Schuller, van der Hucht, van der Hulst, van Loon, Wainscoat   +39 more
core   +2 more sources

Glutamatergic Plasticity in Medial Prefrontal Cortex and Ventral Tegmental Area Following Extended-Access Cocaine Self-Administration [PDF]

, 2011
Glutamate signaling in prefrontal cortex and ventral tegmental area plays an important role in the molecular and behavioral plasticity associated with addiction to drugs of abuse.
Ghasemzadeh, Behnam, Giles, Chad, Mantsch, John R., Purgianto, Anthony, Seubert, Chad, Vasudevan, Preethi   +5 more
core   +2 more sources

Selectivity of mass extinctions: Patterns, processes, and future directions

Cambridge Prisms: Extinction, 2023
AbstractA central question in the study of mass extinction is whether these events simply intensify background extinction processes and patterns versus change the driving mechanisms and associated patterns of selectivity. Over the past two decades, aided by the development of new fossil occurrence databases, selectivity patterns associated with mass ...
Jonathan L. Payne, Jood A. Al Aswad, Curtis Deutsch, Pedro M. Monarrez, Justin L. Penn, Pulkit Singh   +5 more
openaire   +3 more sources

High-Extinction Photonic Filters by Cascaded Mach–Zehnder Interferometer-Coupled Resonators

Photonics
In this study, we demonstrate high-extinction stop-band photonic filters based on Mach–Zehnder interferometer (MZI)-coupled silicon nitride (Si3N4) resonators fabricated using I-line lithography technology.
Hao-Zhong Chen, Kung-Lin Ho, Pei-Hsun Wang   +2 more
doaj   +1 more source

Ensemble coding of context-dependent fear memory in the amygdala

Frontiers in Behavioral Neuroscience, 2013
After fear conditioning, presenting the conditioned stimulus (CS) alone yields a context-specific extinction memory; fear is suppressed in the extinction context, but renews in any other context.
Caitlin A Orsini, Chen eYan, Stephen eMaren   +2 more
doaj   +1 more source

Macroevolutionary dynamics of dentition in Mesozoic birds reveal no long-term selection towards tooth loss

iScience, 2021
Summary: Several potential drivers of avian tooth loss have been proposed, although consensus remains elusive as fully toothless jaws arose independently numerous times among Mesozoic avialans and dinosaurs more broadly.
Neil Brocklehurst, Daniel J. Field
doaj   +1 more source