Results 81 to 90 of about 461,686 (346)

Aristarco revisitado

open access: yesRevista Brasileira de Ensino de Física
Usando as triangulações propostas pelo antigo astrônomo Aristarco, obtivemos neste trabalho o tempo total e a duração do máximo dos eclipses solares e calculamos o tempo total dos eclipses lunares. Para isso, usamos os valores do período orbital da Lua e
T.B. de Oliveira   +2 more
doaj   +1 more source

RANCANG BANGUN APLIKASI MOBILE SISKA BERBASIS ANDROID

open access: yesSINTECH (Science and Information Technology) Journal, 2018
SISKA is an Academic Information System at Ganesha University of Education (UNDIKSHA) used for TESIS process. Starting from proposal submission, proposal seminar, pre thesis exam and thesis exam. So far the running application is still in web form. With
Ni Kadek Ceryna Dewi   +3 more
doaj   +1 more source

Prediction of the thermospheric and ionospheric responses to the 21 June 2020 annular solar eclipse

open access: yesEarth and Planetary Physics, 2020
On 21 June 2020, an annular solar eclipse will traverse the low latitudes from Africa to Southeast Asia. The highest latitude of the maximum eclipse obscuration is approximately 30°.
Tong Dang   +5 more
doaj   +1 more source

Fingerless [PDF]

open access: yes, 2017
This reflective poem about the self and being in a new area is based on the total solar eclipse (dubbed the Great American Eclipse) that occurred on August 21, 2017. It explores themes similar to those raised in discussions about the case of Charity Lamb.
Valdes, Gretel
core   +1 more source

On the ephemeris of the eclipsing polar HU Aquarii. II: New eclipse epochs obtained 2014 - 2018

open access: yes, 2018
The magnetic cataclysmic variable HU Aquarii displayed pronounced modulations of its eclipse timing. These were intensively modeled and discussed in recent years in the framework of planets orbiting the binary or the Applegate effect. No scenario yielded
Schwope, A. D., Thinius, B. D.
core   +1 more source

Decoupling Size and Electronic Effects in Doped SrTiO3 Photocatalysts Through Surface Area–Normalized CO2 Hydrogenation Rates

open access: yesAdvanced Functional Materials, EarlyView.
Exploring the photocatalytic reverse water–gas shift (RWGS) reaction on doped SrTiO3 nanoparticle films, reveals that normalizing catalytic rates by the catalyst's specific surface area (SSA) disentangled surface area effects from the catalyst's intrinsic material properties.
Dikshita Bhattacharyya   +6 more
wiley   +1 more source

Creation of programs for controlling programmable logic controllers using universal development tools

open access: yesInternational Journal of Advanced Studies
Background. Programmable logic controllers (PLCs) play a key role in automation systems across a variety of industries, including industrial manufacturing, transportation, and the energy sector.
Farit I. Lotfullin   +2 more
doaj   +1 more source

Side Reaction Pathway Modulation for Hydrogen Evolution‐Free Aqueous Zn‐Ion Batteries

open access: yesAdvanced Functional Materials, EarlyView.
A ZnO–TeO2–Te ternary composite layer with a unique rice grain‐like morphology is spontaneously formed on the Zn anode via telluric acid additive. This functional interphase effectively suppresses side reactions such as zinc hydroxide sulfate formation, hydrogen evolution, and Zn corrosion, enabling highly reversible and stable Zn metal cycling in ...
Young‐Hoon Lee   +3 more
wiley   +1 more source

Le croissant de lune chez les Éduens et les Lingons sous le Haut-Empire

open access: yesRevue Archéologique de l’Est, 2014
The crescent of the moon is very present on the funerary steles of the Lingones and Aedui. Its two horns point upwards in a position that is uncommon and which, curiously, has never intrigued archaeologists. The position is referred to as a “cradle moon”
Yann Le Bohec
doaj   +1 more source

Modeling D-Region Ionospheric Response of the Great American TSE of August 21, 2017 from VLF signal perturbation

open access: yes, 2018
Solar eclipse is an unique opportunity to study the lower ionospheric variabilities under a controlled perturbation when the solar ultraviolet and X-ray are temporally occulted by the lunar disk.
Basak, Tamal   +4 more
core   +1 more source

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