Results 11 to 20 of about 640 (176)

Assessing the Effects of a Minor CIR‐HSS Geomagnetic Storm on the Brazilian Low‐Latitude Ionosphere: Ground and Space‐Based Observations

open access: yesSpace Weather, Volume 21, Issue 9, September 2023., 2023
Abstract This paper investigates the effects of a minor G1 Co‐rotating Interaction Region (CIR)/High‐Speed Stream (HSS)‐driven geomagnetic storm that occurred on (13–14 October 2018), during deep solar minimum. We used simultaneous observations from multiple instruments, namely; ground‐based Global Navigation Satellite Systems (GNSS) receivers, a ...
F. S. Chingarandi   +6 more
wiley   +1 more source

Diversity of Lifeways in Early Antillean Societies: A Multi-Isotope Approach. [PDF]

open access: yesAm J Biol Anthropol
ABSTRACT Objectives In this paper, we sought to examine whether people with different lifeways, as evidenced by their mobility patterns and dietary practices, inhabited the Antilles in early precolonial time. We also aimed to explore spatiotemporal trends.
Chinique de Armas Y   +8 more
europepmc   +2 more sources

PPP at Low Latitudes With Ionospheric Model Exclusively Based on Single Frequency GNSS Measurements

open access: yesSpace Weather, Volume 21, Issue 8, August 2023., 2023
Abstract Single frequency users of the Global Navigation Satellite System (GNSS) should correct the ionospheric delay to obtain positioning solutions. A valuable source of ionospheric delay corrections is the global ionospheric models (GIMs) of Vertical Total Electron Content.
Ana L. Christovam   +4 more
wiley   +1 more source

Advances in Mid-Infrared Single-Photon Detection

open access: yesPhotonics, 2022
The current state of the art of single-photon detectors operating in the mid-infrared wavelength range is reported in this review. These devices are essential for a wide range of applications, such as mid-infrared quantum communications, sensing, and ...
Stefano Dello Russo   +6 more
doaj   +1 more source

A Deep Learning-Based Solution for Large-Scale Extraction of the Secondary Road Network from High-Resolution Aerial Orthoimagery

open access: yesApplied Sciences, 2020
Secondary roads represent the largest part of the road network. However, due to the absence of clearly defined edges, presence of occlusions, and differences in widths, monitoring and mapping them represents a great effort for public administration.
Calimanut-Ionut Cira   +3 more
doaj   +1 more source

Launching Nova Geodesia Journal

open access: yesNova Geodesia, 2021
Geodesy is the science of measuring and representing the earth, whose beginnings are ancient and are found in antiquity. Like other disciplines, it has known a continuous evolution, along with the evolution of human society and the development of knowledge.
openaire   +2 more sources

Un diagnóstico de infraestructura geodésica en la región de Centroamérica y el Caribe

open access: yesRevista Cartográfica, 2019
El documento presenta un sumario de la infraestructura geodésica existente en ocho países de la región Centroamericana y del Caribe. A través de mapas y tablas se ofrecen cifras actualizadas concretas sobre cantidad y ubicación de las redes de control ...
David Avalos Naranjo   +7 more
doaj   +1 more source

Estudio de la electrocoagulación para controlar la turbidez y el pH en el tratamiento de efluentes minero metalúrgicos polimetálicos

open access: yesRevista del Instituto de Investigación de la Facultad de Minas, Metalurgia y Ciencias Geográficas, 2017
La electrocoagulación es un método electroquímico para remover contaminantes, para lo cual se utiliza un ánodo y un cátodo, en donde se producen reacciones químicas y físicas, entre iones con carga opuesta, lo que facilita la atracción de las partículas ...
Marilú Calderón, Vidal Aramburú
doaj   +1 more source

A Presença da Geodésia nos Cursos de Matemática da Academia Militar Brasileira no Século XIX

open access: yesRevista Brasileira de História da Matemática, 2020
O propósito desse artigo é fomentar discussões históricas sobre o contexto do fazer científico e de práticas educacionais mescladas na relação conjunta entre conhecimentos da geodésia e da matemática.
Ligia Arantes Sad
doaj   +1 more source

DSM GENERATION FROM HIGH RESOLUTION COSMO-SKYMED IMAGERY WITH RADARGRAMMETRIC MODEL [PDF]

open access: yesThe International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2012
The availability of new high resolution radar spaceborne sensors offers new interesting potentialities for the geomatics application: spatial and temporal change detection, features extraction, generation of Digital Surface (DSMs).
P. Capaldo   +4 more
doaj   +1 more source

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