Results 71 to 80 of about 18,958 (240)

Simultaneous water uptake from shallow groundwater and drip irrigation: Lysimeter experiments with ceramic cups

Vadose Zone Journal, Volume 24, Issue 2, March/April 2025.
Abstract This study investigates the interplay between shallow groundwater and on‐surface drip irrigation in facilitating water uptake of agricultural crops. Lysimeter experiments utilizing ceramic cups mimicking plant roots provide insights into wetting patterns within the root zone and water balance components.
Ben Cohen, Ido Nitsan, Ilan Ben‐Noah, Shmulik P. Friedman   +3 more
wiley   +1 more source

The Physical Connections Among IR QSOs, PG QSOs and Narrow-Line Seyfert 1 Galaxies

, 2005
We study the properties of infrared-selected QSOs (IR QSOs), optically-selected QSOs (PG QSOs) and Narrow Line Seyfert 1 galaxies (NLS1s). We compare their properties from the infrared to the optical and examine various correlations among the black hole ...
C. N. Hao, Clements D. L., Haas M., Hong Wu, Kauffmann G., Lawrence A., Shude Mao, X. Y. Xia, Xia X. Y., Z. G. Deng, Zheng Z.   +10 more
core   +2 more sources

The SUPERCOLD-CGM Survey. II. [C i](1–0) Emission and the Physical Conditions of Cold Gas in Enormous Lyα Nebulae at z ∼ 2

The Astrophysical Journal
We report Atacama Large Millimeter/submillimeter Array and Atacama Compact Array observations of atomic carbon ([C i ](1–0)) and dust continuum in 10 enormous Ly α nebulae hosting ultraluminous Type-I QSOs at z = 2.2–2.5, as part of the Survey of ...
Jianan Li, Bjorn H. C. Emonts, Zheng Cai, Jianrui Li, Ran Wang, Montserrat Villar-Martín, Fabrizio Arrigoni Battaia, Mingyu Li, Yunjing Wu, Ilsang Yoon, Matthew D. Lehnert, Kyle Massingill, Craig Sarazin, Jason X Prochaska, Mark Lacy, Brian Mason   +15 more
doaj   +1 more source

Optimal Low-Thrust Transfers Between Relative Planar and Spatial Quasi-Satellite Orbits in the Earth–Moon System

Aerospace
This paper investigates the design of optimal low-thrust transfers between relative planar and spatial quasi-satellite orbits (QSOs) in the Earth–Moon system under the Circular Restricted Three-Body Problem (CR3BP).
Nishanth Pushparaj, Naoki Hiraiwa, Yuta Hayashi, Mai Bando   +3 more
doaj   +1 more source

Gaia science alerts and the observing facilities of the Serbian-Bulgarian mini-network telescopes [PDF]

Serbian Astronomical Journal, 2014
The astrometric European Space Agency (ESA) Gaia mission was launched in December 19, 2013. One of the tasks of the Gaia mission is production of an astrometric catalog of over one billion stars and more than 500000 extragalactic sources.
Damljanović G., Vince O., Boeva S.
doaj   +1 more source

Pending Problems in QSOs

International Journal of Astronomy and Astrophysics, 2011
REVIEW, 15 pages, accepted to be published in Intl. J. Astr. Astrophys (previously it had been accepted by Invertis J. Sci. Techn.
openaire   +4 more sources

The 2dF QSO Redshift Survey [PDF]

, 1999
We present preliminary results from the 2-degree Field (2dF) QSO Redshift Survey currently under way at the Anglo-Australian Telescope.
P. J. Outram, T. Shanks, B. J. Boyle, S. M. Croom, F. Hoyle, N. S. Loaring, L. Miller, A. D. Myers, R. J. Smith   +8 more
openaire   +3 more sources

Advancements in Q‐learning meta‐heuristic optimization algorithms: A survey

WIREs Data Mining and Knowledge Discovery, Volume 14, Issue 6, November/December 2024.
Future research directions include exploring diverse meta—heuristic integrations, investigating transfer learning strategies, and advancing techniques for state space reduction. Abstract This paper reviews the integration of Q‐learning with meta‐heuristic algorithms (QLMA) over the last 20 years, highlighting its success in solving complex optimization
Yang Yang, Yuchao Gao, Zhe Ding, Jinran Wu, Shaotong Zhang, Feifei Han, Xuelan Qiu, Shangce Gao, You‐Gan Wang   +8 more
wiley   +1 more source

Dust grain growth in the interstellar medium of 5 [PDF]

, 2010
We investigate whether stellar dust sources i.e. asymptotic giant branch (AGB) stars and supernovae (SNe) can account for dust detected in 55 QSOs. SNe (but not AGB stars) may deliver enough heavy elements to fuel this growth.Comment: A&A, accepted.
Alton, Aravena, Barlow, Beelen, Benford, Bertoldi, Bertoldi, Bianchi, Blair, Borkowski, C. Gall, Carilli, Carilli, Carilli, Cherchneff, Cherchneff, D. Watson, Draine, Dunne, Dunne, Dunne, Dunne, Dwek, Dwek, Dwek, E. J. Murphy, Ercolano, Ferrarotti, Gomez, Gomez, Green, Haas, Hauser, Hirashita, J. Hjorth, J. S. Dunlop, Knudsen, Kotak, Krause, Lee, Leech, Leipski, M. J. Michałowski, Maiolino, Maiolino, Matsuura, Meikle, Michałowski, Michałowski, Michałowski, Michałowski, Morgan, Morgan, Nozawa, Perley, Petric, Polletta, Priddey, Priddey, Priddey, Rho, Rho, Ridgway, Riechers, Robson, Sakon, Salpeter, Sandstrom, Sibthorpe, Sloan, Stratta, Sugerman, Todini, Valiante, Veilleux, Vlahakis, Walter, Walter, Walter, Wang, Wang, Wang, Wang, Wesson, Wilson, Wu, Zafar, Zhukovska   +87 more
core   +2 more sources

Exploring Unobscured Quasi-stellar Objects in the Southern Hemisphere with KS4

The Astrophysical Journal Supplement Series
We present a catalog of unobscured quasi-stellar object (QSO) candidates in the Southern Hemisphere from the early interim data of the KMTNet Synoptic Survey of Southern Sky (KS4).
Yongjung Kim, Minjin Kim, Myungshin Im, Seo-Won Chang, Mankeun Jeong, Woowon Byun, Joonho Kim, Dohyeong Kim, Hyunjin Shim, Hyunmi Song   +9 more
doaj   +1 more source