Results 81 to 90 of about 1,232,903 (298)

Infrared fibres in astronomical instrumentation [PDF]

, 1995
For several years multi-object spectroscopy systems have been available for carrying out survey work in the visible region, but until very recently there has not been a system for the near infrared region.
Haynes, Roger
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From Flow to Function: Using Different Static Mixers to Fabricate Microarchitected Materials Via Chaotic Printing

Advanced Science, EarlyView.
Complex microarchitectures emerge from simple flow‐driven transformations as static mixers iteratively reorient and split material domains. Coupled with diverse deposition strategies, chaotic printing provides an accessible platform for fabricating architected materials that support biologically and chemically relevant processes. ABSTRACT Nature builds
Edna Johana Bolívar‐Monsalve, Carlos Fernando Ceballos‐González, Diego Alonso Quevedo‐Moreno, Irving Isaí Rendón‐Moreno, Ariel Cantoral‐Sánchez, Héctor Ambriz‐González, Mario Moisés Alvarez, Grissel Trujillo‐de Santiago   +7 more
wiley   +1 more source

THE PUERTO RICO TOWER, CAMPECHE. STUDY OF A UNIQUE CASE IN MAYAN ARCHITECTURE

EGA, 2011
One of the most outstanding aspects of Mayan culture is its remarkable progress in the subject of astronomy. According to very recent research, astronomical knowledge of the Mayans can be confirmed on the inscriptions of sculptural monuments, codices and
José Luis Higón Calvet, Manuel May Castillo   +1 more
doaj   +1 more source

Structural Colors from Modulated Topological Defects in Molecular Smectic Liquid Crystals

Advanced Science, EarlyView.
Rather than using dyes and pigments, nature produces the colors of some butterflies and beetles through optical interference phenomena. This study describes an original biomimetic strategy exploiting the spontaneous formation of modulated linear defects in thin films of 8CB, a common molecular liquid crystal.
Camille N. Mahyaoui, Guilhem Poy, Rabab Zehra, Axel Fouques, Vassili Sergan, Ivan Dozov, Claire Meyer, Patrick Davidson   +7 more
wiley   +1 more source

Visualising Eclipses: Graphical Constructions of Eclipse Phenomena in the Sanskrit Astral Sciences

HoST
Eclipse reckoning constituted a significant component of the Indian astronomical tradition and was underpinned by a sophisticated interplay between mathematical theory, observational data, and visual practices.
Dhammaloka Jambugahapitiye, Kolachana Aditya, Montelle Clemency   +2 more
doaj   +1 more source

Probing Electrocatalyst Design for Product Selectivity in CO2 Reduction

Advanced Science, EarlyView.
Selective CO2 electroreduction is controlled by catalyst structure, dynamic surface reconstruction, adsorbate interactions, and reaction microenvironment. This review summarizes Cu‐ and non‐Cu‐based catalysts, single‐atom and molecular systems, degradation pathways, and operando/computational strategies for steering CO2RR toward hydrocarbons ...
Suvodeep Sen, Bapan Biswas, Apinya Ngoipala, Julia Wiktor, Ujjwal Pal, Shalini Singh   +5 more
wiley   +1 more source

Possible cosmic rays origin of periodic components in gamma-background signals [PDF]

Ядерна фізика та енергетика
Analysis of a long-term regular series of measurements of signals from the automated system of radiation control (ASRC) in the Chornobyl exclusion zone revealed many features, which are reproduced for different observation posts and which we will try to ...
A. D. Skorbun
doaj   +1 more source

Quantized Phenomena in Astronomy and Astronomic Quantum Theory [PDF]

, 2013
The Titius-Bode law may be represented to a new form . From this we can develop a quantum theory, and obtain the quantum constants of the solar system, and derive the astronomical Schrodinger equation. So many quantities of the solar system can be quantized, and the distance rule is a statistical result of planet evolution.
openaire   +1 more source

Human Foetal Neuroblasts Exhibit BK Channel‐Dependent Membrane Voltage Oscillations upon Depolarization

Advanced Science, EarlyView.
Primary cultures of neuroblasts isolated from the nucleus basalis of Meynert of 12‐weeks‐old human foetuses were prepared. Whole‐cell patch‐clamp recordings were performed by injecting a depolarizing stimulus current (+500 pA; 500 ms), and the membrane voltage recorded; this stimulus current evoked periodic‐like oscillations in membrane voltage ...
Elisabetta Coppi, Federica Cherchi, Martina Venturini, Federico Tommasi, Sandro Gonzi, Chiara Capacci, Giulia Guarnieri, Pasquale Gallina, Annamaria Morelli, Anna Maria Pugliese   +9 more
wiley   +1 more source

Report on the organization of the International Astronomical Union,

, 1920
Contains "Statutes of convention" organizing the International Astronomical Union, and reports of committees of the American Section of the International Astronomical Union."Published in the Proceedings of the National Academy of Sciences, June, 1920 ...
International Astronomical Union. American Section.
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