Results 41 to 50 of about 56,626 (163)
Spatially Resolved Monitoring of Drying of Hierarchical Porous Organic Networks [PDF]
, 2016 Evaporation kinetics of water confined in hierarchal polymeric porous media is studied by low field nuclear magnetic resonance (NMR). Systems synthesized with various degrees of cross-linker density render networks with similar pore sizes but different ...
Acosta, Rodolfo Hector +7 more
core +1 more source
Laser‐Enabled Nanopinholes for Silicon Solar Cells with Polycrystalline Si/SiOx Passivating Contacts
Solar RRL, Volume 10, Issue 8, 27 April 2026.Conductive nanoscale pinholes are created by selective heating of pyramid tips on randomly textured silicon via pulsed laser irradiation. Due to heat concentration at the pyramid tips, the dielectric passivating layer is selectively opened at the pyramid tips.
Dirk W. Steyn +12 more
wiley +1 more source
Editorial - Reflexiones sobre la enseñanza de la astronomía [PDF]
Góndola, Enseñanza y Aprendizaje de las Ciencias, 2018 ¿Por qué enseñamos astronomía en las escuelas? Es más, ¿se debe enseñar astronomía en las escuelas?
Néstor Camino
doaj
Al-Qantara : Revista de Estudios Arabes, 2009 Ŷābir b. Aflaḥ al-Išbīlī, conocido como Geber filius Afflay Hispalensis en la Europa medieval, fue un matemático y astrónomo teórico que probablemente floreció en Sevilla durante el primer cuarto del s. XII. Ŷābir b.
José Bellver Martínez
doaj +1 more source
Shape‐Changing Multiphase Microparticles from Complex Liquid Crystal Emulsions
Advanced Functional Materials, Volume 36, Issue 35, 30 April 2026.Liquid crystalline network (LCN) microparticles are prepared from single, double (Janus), and triple emulsions through a simple and scalable bulk‐emulsification strategy. Under heating, the particles exhibit robust, reversible, large‐amplitude deformations that depend both on the morphology and the liquid crystals director field configuration.
Marco Turriani +3 more
wiley +1 more source
Kerr geometry in f(T) gravity [PDF]
, 2015 Null tetrads are shown to be a valuable tool in teleparallel theories of modified gravity. We use them to prove that Kerr geometry remains a solution for a wide family of theories of gravity.Fil: Bejarano, Cecilia Soledad.
Bejarano, Cecilia Soledad +2 more
core +2 more sources
Ensino da astronomia no Brasil: educação formal, informal, não formal e divulgação científica
Revista Brasileira de Ensino de FísicaEste artigo deriva de uma pesquisa mais ampla sobre a educação em astronomia e a formação de professores, e apresenta um panorama geral sobre o tema em âmbito nacional.
Rodolfo Langhi, Roberto Nardi
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Earth and Space Science, Volume 13, Issue 4, April 2026.Abstract We present a new empirical vertical E×B $\mathbf{E}\times \mathbf{B}$ drift model developed using ground‐based magnetometer, radar, and satellite data over equatorial latitude regions. We first implement an algorithm relating magnetometer derived equatorial electrojet (EEJ) and vertical ion plasma drift (equivalent to vertical E×B $\mathbf{E ...
John Bosco Habarulema +9 more
wiley +1 more source
Journal of Geophysical Research: Solid Earth, Volume 131, Issue 4, April 2026.Abstract The Ediacaran–Cambrian (∼635–539 Ma) geomagnetic field is characterized by unusually high reversal rates and markedly weakened field strength. Estimates of these reversal frequencies can reveal key aspects of deep Earth dynamics and their potential influence on surface environments and early complex life.
J. W. L. Afonso +12 more
wiley +1 more source
Building Reliable Models of M Dwarf Chromospheres: The Spectral Diagnostics [PDF]
, 2000 As part of an ongoing project to study how reliable are the chromospheric models constructed semiempirically to fit the chromospheric spectrum of cold stars, in this paper we study how changes in the assumed chromospheric structure of dM and dMe stars ...
Mauas, Pablo Jacobo David
core +1 more source