Results 101 to 110 of about 260,301 (310)
Commissioning an Inexpensive Off‐The‐Shelf Spectrograph for Radial‐Velocity Studies
Astronomische Nachrichten, EarlyView.ABSTRACT We present a way to set up an inexpensive out of the shelf spectrograph at a local observatory. Stability and resolution of the spectrograph are high enough for radial velocity determination of binary stars or determination of stellar characteristics. Even some exoplanets might be detectable via the radial velocity method.
Lukas Stock, Andreas Schrimpf
wiley +1 more source
Spiritual Contributions of TGH. Ibrahim Al-Khalidy’s Prayer to SDGs Achievement on Lombok Island
ProfetikaObjective: The purpose of this study is to analyze the algorithm for the preparation of the Prayer Schedule Throughout the Lifetime by TGH. Ibrahim al-Khalidy, evaluated its relevance, as well as tested its accuracy.
Abdul Kohar
doaj +1 more source
Science Education International, 2019 Research related to the teaching and learning of the lunar phases reveals a low level of understanding of this astronomical phenomenon by most students of all educational levels.
Diego Galperin, Andrés Raviolo
doaj +1 more source
Astronomische Nachrichten, EarlyView.ABSTRACT Planetary nebulae represent a late evolutionary phase of low‐ to intermediate‐mass stars. In this article, we present the serendipitous discovery of a previously unknown, faint potential Galactic planetary nebula (PN) in the constellation Camelopardalis, identified during a survey‐inspection, aiming at the detection of dwarf companions of the ...
W. E. Celnik +12 more
wiley +1 more source
RECENT DEVELOPMENTS IN ULTRA-HIGH ENERGY NEUTRINO ASTRONOMY
Acta Polytechnica, 2013 We outline the current situation in ultrahigh energy (UHE) cosmic ray physics, pointing out the remaining problems, in particular the puzzle concerning the origin of the primary radiation and the role of neutrino astronomy for locating the sources ...
Peter K. F. Grieder
doaj +1 more source
Early evolutionary history of the seed
Biological Reviews, EarlyView.ABSTRACT The seed is an essential stage in the life history of gymnospermous and angiospermous plants, facilitating both their survival and dispersal. We reappraise knowledge of the evolutionary history of the gymnospermous seed, from its origin in the late Devonian through to the well‐known end‐Permian extinctions – an interval encompassing the ...
Richard M. Bateman +2 more
wiley +1 more source
Enseñanza de las Ciencias, 2014 The aim of this study is to find out how teachers of the last years of Primary and the first years of Secondary evaluate and what difficulties they find in relation to a series of cognitive-linguistic skills (description of facts,…). It also aims to find
Susana García Barros +1 more
doaj +1 more source
When Dihedral Angles Mask Denticity in Molecular Conductance
ChemPhysChem, EarlyView.This study tests whether higher molecule–electrode denticity increases conductance in single‐molecule junctions. Using nonequilibrium Green's function technique in conjunction with density functional theory simulations and mechanically controlled break‐junction experiments on a tetradentate N‐heterohexacene, it is found that conductance depends mainly ...
Kevin Batzinger +8 more
wiley +1 more source
ENERGY &ENVIRONMENTAL MATERIALS, EarlyView.A one‐pot metal–ammonia synthesis enables uniform Mn2O3 nanoparticle deposition on activated carbon, yielding composites with excellent electrochemical performance in supercapacitors. The method maximizes manganese utilization, eliminates toxic solvents, and achieves 34% of the theoretical maximum capacitance, significantly outperforming existing Mn–C ...
Katrina Mazloomian +4 more
wiley +1 more source
The stellar coronal X-ray Explorer: STCOEX [PDF]
The status of the newly born field of stellar X-ray astronomy is considered. The need for further observational capability, the study of stellar surface activity and the development of design criteria for a follow-up mission, with primary emphasis on ...
Vaiana, G. S.
core +1 more source