Results 11 to 20 of about 3,164,796 (323)

Changing-Look AGNs or Short-Lived Radio Sources? [PDF]

Frontiers in Astronomy and Space Sciences, 2017
The evolution of extragalactic radio sources has been a fundamental problem in the study of active galactic nuclei for many years. A standard evolutionary model has been created based on observations of a wide range of radio sources.
Aleksandra Wołowska, Magdalena Kunert-Bajraszewska, Kunal Mooley, Gregg Hallinan   +3 more
doaj   +6 more sources

Inferring evolutionary dynamics of mutation rates through the lens of mutation spectrum variation.

Current Opinion in Genetics and Development, 2020
There are many possible failure points in the transmission of genetic information that can produce heritable germline mutations. Once a mutation has been passed from parents to offspring for several generations, it can be difficult or impossible to ...
Jedidiah Carlson, William S. DeWitt, Kelley Harris   +2 more
semanticscholar   +1 more source

Comparison of Theoretical Starburst Photoionisation Models for Optical Diagnostics [PDF]

, 2019
We study and compare different examples of stellar evolutionary synthesis input parameters used to produce photoionisation model grids using the MAPPINGS V modelling code.
Byler, Nell, D'Agostino, Joshua J., Groves, Brent, Kewley, Lisa J., Leitherer, Claus, Nicholls, David, Stanway, Elizabeth R., Sutherland, Ralph S.   +7 more
core   +2 more sources

Hydration index and hydrated constitutive model of clay shale using acoustic frequency spectrum

Energy Science & Engineering, 2019
Clay shale is frequently encountered in drilling. With strong hydration capacity, when clay shale contacts with drilling fluid, rock structural and mechanical property will be affected, causing wellbore instability.
Xiangjun Liu, Yi Ding, P G Ranjith, Pingya Luo   +3 more
doaj   +1 more source

Radio properties of Compact Steep Spectrum and GHz-Peaked Spectrum radio sources [PDF]

, 2015
Compact steep spectrum (CSS) and GHz-peaked spectrum (GPS) radio sources represent a large fraction of the extragalactic objects in flux density-limited samples.
Alexander, Araya, Bicknell, Brocksopp, Burns, Cassaro, Conway, Cotton, Cotton, Dallacasa, Dallacasa, Dallacasa, Dasyra, Fanaroff, Fanti, Fanti, Fanti, Fanti, Fanti, Fanti, Garcia-Burillo, Giroletti, Gugliucci, Gupta, Hancock, Kellermann, Kunert, Kunert-Bajraszewska, Kunert-Bajraszewska, Kunert-Bajraszewska, Labiano, Luo, Mack, Mantovani, Mantovani, Mantovani, Marr, Marr, Mingaliev, Morganti, Morganti, Morganti, Morganti, Morganti, Murgia, Murgia, Murgia, Nagai, O'Dea, Ocaña-Flaquer, Orienti, Orienti, Orienti, Orienti, Orienti, Orienti, Orienti, Orienti, Parma, Peck, Peck, Pihlström, Polatidis, Polatidis, Readhead, Rossetti, Rossetti, Rossetti, Saikia, Saikia, Scott, Shulevski, Siemiginowska, Snellen, Snellen, Snellen, Spencer, Stanghellini, Stanghellini, Sutherland, Tingay, Tingay, Tinti, Torniainen, Torniainen, Tremblay, Vermeulen, Wilkinson   +87 more
core   +2 more sources

Evolutionary Philosophy of Science: A New Image of Science and Stance towards General Philosophy of Science

Philosophies, 2017
An important question facing contemporary philosophy of science is whether the natural sciences in terms of their historical records exhibit distinguishing developmental patterns or structures. At least two philosophical stances are possible in answering
James A. Marcum
doaj   +1 more source

STATISTICAL RESEARCH IN EVOLUTIONARY GENETIC RELATIONSHIP OF DMS-, DW-, KW- AND KE-TYPES OF DOUBLE STARS

Odessa Astronomical Publications, 2017
Statistical relations as spectrum-period, mass of primary component-semi-major axes of an orbit, excesses of luminosity and radius-mass of component, Karetnikov's diagram, modern and initial distributions of the binaries in the 1 ps3 of Sun neighbourhood
G. N. Dryomova, M. A. Svechnikov
doaj   +1 more source

Tracer spectrum: a visualisation method for distributed evolutionary computation [PDF]

Genetic Programming and Evolvable Machines, 2010
We present a novel visualisation method for island-based evolutionary algorithms based on the concept of tracers as adopted in medicine and molecular biology to follow a biochemical process. For example, a radioisotope or dye can be used to replace a stable component of a biological compound, and the signal from the radioisotope can be monitored as it ...
O'Neill, Michael, Brabazon, Anthony, Hemberg, Erik   +2 more
openaire   +3 more sources

Synthesis of accelerograms compatible with the Chinese GB 50011-2001 design spectrum via harmonic wavelets: artificial and historic records [PDF]

, 2009
A versatile approach is employed to generate artificial accelerograms which satisfy the compatibility criteria prescribed by the Chinese aseismic code provisions GB 50011-2001.
A. Giaralis, A. Giaralis, A. Kottke, A. Preumont, A.B. Mason, A.K. Chopra, A.K. Chopra, C.-C. Lin, CEN, D.E. Newland, D.E. Newland, D.L. Karabalis, D.M. Boore, D.M. Boore, D.M. Boore, D.M. Boore, E. Faccioli, E.H. Vanmarcke, F. Kozin, F. Naeim, G. Falsone, G. Michaelov, G.C. Marano, GB 50011-2001, H. Morikawa, I. Iervolino, I.D. Gupta, ICC, J. Hancock, J. Hancock, J. Iyama, J. Nocedal, J. Wang, J.B. Roberts, J.J. Bommer, J.J. Bommer, J.L. Bogdanoff, J.P. Conte, Jie Li, K. Kanai, L.D. Lutes, L.E. Suárez, L.E. Suárez, M. Shrikhande, M.B. Priestley, M.D. Trifunac, N. Lam, N.P. Politis, P. D. Spanos, P.D. Spanos, P.D. Spanos, P.D. Spanos, P.D. Spanos, P.D. Spanos, P.D. Spanos, P.G. Crespi, R.S. Jangid, R.W. Clough, S. Das, S. Hu, S. Mukherjee, S. Ólafsson, S.-T. Quek, S.P. Lai, Y. Wang, Y.K. Wen   +65 more
core   +1 more source

Constraints on evolutionary properties of GHz Peaked Spectrum galaxies [PDF]

Astronomy & Astrophysics, 2006
We have used the available samples of Gigahertz Peaked Spectrum (GPS) galaxies to investigate their evolution properties in the framework of the ``youth'' scenario. Care was taken to properly allow for the different selection criteria used to define the samples.
Tinti, S., De Zotti, G.
openaire   +2 more sources