Results 11 to 20 of about 20,300 (107)
Principal Component‐Based Classification of Blazar Candidates of Uncertain Type in the 4FGL/LAT
Astronomische Nachrichten, EarlyView.ABSTRACT We adopted principal component analysis (PCA), linear discriminant analysis (LDA), and support vector machines (SVM), to study classification for a sample of 2708 Fermi blazars: 1142 BL Lac objects (BLLs), 759 flat spectrum radio quasars (FSRQs), and 807 blazar candidates of uncertain type (BCUs).
Wen‐Xin Yang +13 more
wiley +1 more source
Direct SMBH Formation Driven by Runaway Stellar Collisions in Globally Unstable Stellar Systems
Astronomische Nachrichten, EarlyView.ABSTRACT The fueling problem addresses the ultimate fate of the reservoirs of gas and stars driven into the deepest gravitational potential wells of galaxies, thus it may contain the Universe's densest concentrations of gas and stars. This raises a key question: does the infalling material collapse directly into a supermassive black hole, or can it ...
Marcelo C. Vergara, Andrés Escala
wiley +1 more source
Museo de Astronomía y Geodesia : guia de visita [PDF]
, 2001 El museo de Astronomía y Geodesia de la Universidad Complutense de Madrid acoge una importante colección de instrumentos de Astronomía, Geodesia y Topografia de los siglos XIX y XX recogida gracias al esfuerzo del catedrático D.
Sevilla, Miguel J.
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Renaissance Studies, EarlyView.ABSTRACT This article examines the iconography of the Andromeda constellation as an intersex figure within medieval and early modern astrological traditions. It focuses on the origins of this imagery in the thirteenth‐century astrological writings of Scot and its reappearance nearly three centuries later in Ratdolt's illustrated 1482 edition of Hyginus'
Bar Leshem
wiley +1 more source
Iberian Scepticism in Istanbul: The Hebrew Philosophical Dialogue Attributed to Don Joseph Nasi
Renaissance Studies, EarlyView.ABSTRACT On 28 April 1577, the printer Joseph Ya’abetz in Constantinople printed a rare Hebrew pamphlet titled Ben Porat Yosef (Joseph, the Offspring of a Fertile Tree). Its author, Isaac ben Samuel Onkeneira, claims to report a philosophical debate between Don Joseph Nasi (1524–1579), the powerful Portuguese‐born agent at the Ottoman court, and a ...
Carsten L. Wilke
wiley +1 more source
Spectral Reconstruction Using Broadband Inkjet‐Printed Optical Filters
Advanced Optical Materials, Volume 14, Issue 40, 27 October 2026.A proof‐of‐concept for a reconstructive spectrometer based on inkjet‐printed interferometric optical filters is demonstrated. Through adaptive encoding and robust post‐processing algorithms, spectral reconstruction is achieved over a 400 nm visible bandwidth at a fraction of the cost and complexity of typical encoders while maintaining high optical ...
Leonardo Baini +9 more
wiley +1 more source
ChemistryEurope, Volume 4, Issue 10, October 2026.EDOT‐acid pretreatment promotes robust adhesion of electrodeposited PEDOT coatings on gold and nickel–phosphorus electrodes through interfacial molecular interactions. Enhanced adhesion, nanoscale surface modification, and stable electrochemical performance enable durable PEDOT coatings directly on Ni–P, providing a promising route toward low‐impedance
Sara Ebrahimi +5 more
wiley +1 more source
Astronomía I. Posicionamiento, observación básica [PDF]
, 2011 77 páginas, ilustraciones, fotografías...Lección 1, nociones elementales para realizar una observación del cielo. Segunda edición del curso de "Astronomía Básica" impartida por los miembros de la Federación de Asociaciones de Astronomía Cielo de Comellas.
Federación de Asociaciones de Astronomía Cielo de Comellas
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Removing the Effect of Source Structure From Correlated VLBI Data
Radio Science, Volume 61, Issue 10, October 2026.Abstract Recent studies suggest that in geodetic very long baseline interferometry (VLBI) the assumption of sources being point‐like results in a significant residual error introduced by the effect of source structure. Our aim is to remove the impact of source structure from geodetic VLBI data right after the correlation step. For this purpose, we have
Frédéric Jaron +8 more
wiley +1 more source
, 2013 Alfredo Santillán explica en el Reunión CUDI, Primavera 2013 las actividades de la comunidad de Astronomía en México y los vínculos que existen con las demás ...
Santillán González, Alfredo J.
core +1 more source