Results 11 to 20 of about 92,651 (143)
Family Planning and the Long Eighteenth‐Century Pocketbook
Journal for Eighteenth-Century Studies, Volume 46, Issue 1, Page 113-133, March 2023., 2023 Abstract Eighteenth‐century medical literature recommended that women record their menstrual cycles to identify dates of conception, measure gestation, and predict delivery. Women's pocketbooks were natural repositories of such pregnancy‐related data. This article charts the history of women's pocketbooks providing printed affordances for menstruation,
Helen Williams
wiley +1 more source
Advances in space quantum communications
IET Quantum Communication, Volume 2, Issue 4, Page 182-217, December 2021., 2021 Abstract Concerted efforts are underway to establish an infrastructure for a global quantum Internet to realise a spectrum of quantum technologies. This will enable more precise sensors, secure communications, and faster data processing. Quantum communications are a front‐runner with quantum networks already implemented in several metropolitan areas. A
Jasminder S. Sidhu +17 more
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Estudios latinoamericanos, 2023 La fecha 11-Ozomatli es de gran importancia entre las inscripciones calendáricas en la fachada del Templo de la Serpiente Emplumada en Xochicalco. Yo argumenté en 1995 en el capítulo „Astronomía en Xochicalco” del libro “La acropolis de Xochicalco”, que ...
A. Lebeuf
semanticscholar +1 more source
OPTIMAL TWO-IMPULSE INTERPLANETARY TRAJECTORIES: EARTH-VENUS AND EARTH-MARS MISSIONS
Revista mexicana de astronomía y astrofísica, 2023 This work describes several models to design optimal interplanetary trajectories. The transfer problem consists in transferring a space vehicle from a circular low Earth orbit (LEO) to a circular low orbit around a destiny planet (Venus or Mars).
L. A. Gagg Filho +2 more
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Como determinar a altura das crateras lunares em uma atividade de aprendizagem investigativa
Scientia Plena, 2022 Propomos neste trabalho uma atividade interdisciplinar de aprendizagem combinando procedimentos de ensino investigativo, técnicas de medição e aplicação do método científico baseados na situação problema de como medir a altura das crateras da Lua ...
Miqueline Aragão Silva +2 more
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The influence of religious and cosmological beliefs on the solar architecture of the ancient world [PDF]
, 2014 In the earliest civilizations of the Ancient World, sun worship developed in parallel with an understanding of the movement of the stars. That was the origin of an architecture that expressed a number of religious and cosmological beliefs.
Fumadó Alsina, Joan Lluís +2 more
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Earth and Space Science, Volume 7, Issue 4, April 2020., 2020 Abstract Elves are a class of transient luminous events, with a radial extent typically greater than 250 km, that occur in the lower ionosphere above strong electrical storms. We report the observation of 1,598 elves, from 2014 to 2016, recorded with unprecedented time resolution (100 ns) using the fluorescence detector (FD) of the Pierre Auger Cosmic ...
A. Aab +389 more
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Comparing the Properties of ICME‐Induced Forbush Decreases at Earth and Mars
Journal of Geophysical Research: Space Physics, Volume 125, Issue 3, March 2020., 2020 Abstract Forbush decreases (FDs), which are short‐term drops in the flux of galactic cosmic rays, are caused by the shielding from strong and/or turbulent magnetic structures in the solar wind, especially interplanetary coronal mass ejections (ICMEs) and their associated shocks, as well as corotating interaction regions.
Johan L. Freiherr von Forstner +11 more
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Análise de crateras lunares como ferramenta alternativa para o ensino de física e astronomia
, 2020 Resumo Neste trabalho realizamos medições indiretas dos tamanhos de algumas crateras lunares, bem como, de suas coordenadas selenográficas a partir de fotografias da superfície lunar.
Ibson José Maciel Leite +4 more
semanticscholar +1 more source
A new approach to generate a catalogue of potential historical novae
Astronomische Nachrichten, Volume 341, Issue 1, Page 79-98, January 2020., 2020 Abstract Ancient Chinese, Korean, and Vietnamese observers left us records of celestial sightings, the so‐called “guest stars” dated up to ∼2500 years ago. Their identification with modern observable targets could open interesting insights into the long‐term behavior of astronomical objects, as shown by the successful identification of eight galactic ...
Susanne M. Hoffmann +2 more
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