Results 21 to 30 of about 67,582 (261)

ALGUNOS RECUERDOS SOBRE LOS ORÍGENES DEL CÁLCULO AUTOMÁTICO EN ARGENTINA, Y SUS ANTECENDENTES EN ESPAÑA E ITALIA

open access: yesRevista Brasileira de História da Matemática, 2020
Las memorias relatadas en este artículo se refieren a mi lejana colaboración con el Prof. Julio Rey Pastor en el Instituto de Calculo del CSIC de Madrid, en los años 1950; a un viaje de estudios a Italia que inicié acompañando a Rey Pastor y a mi trabajo
Ernesto Garcia Camarero
doaj   +1 more source

Equalization-Based Digital Background Calibration Technique for Pipelined ADCs [PDF]

open access: yes, 2014
In this paper, we present a digital background calibration technique for pipelined analog-to-digital converters (ADCs). In this scheme, the capacitor mismatch, residue gain error, and amplifier nonlinearity are measured and then corrected in digital ...
Moosazadeh, Tohid   +3 more
core   +1 more source

High resolution magnetic anomaly map of Tenerife, Canary Islands

open access: yesAnnals of Geophysics, 2007
This study presents magnetic anomaly data from a new high-resolution, low-altitude helicopter-borne magnetic survey recently collected on and offshore Tenerife in the Canary Archipelago.
N. Sánchez   +9 more
doaj   +1 more source

Compact low-power calibration mini-DACs for neural arrays with programmable weights [PDF]

open access: yes, 2003
This paper considers the viability of compact low-resolution low-power mini digital-to-analog converters (mini-DACs) for use in large arrays of neural type cells, where programmable weights are required.
Linares Barranco, Bernabé   +2 more
core   +1 more source

Global Air Quality and COVID-19 Pandemic: Do We Breathe Cleaner Air?

open access: yesAerosol and Air Quality Research, 2021
The global spread of Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2) has challenged most countries worldwide. It was quickly recognized that reduced activities (lockdowns) during the Coronavirus Disease of 2019 (COVID-19) pandemic produced ...
Mehdi Amouei Torkmahalleh   +53 more
doaj   +1 more source

Discourses on social innovation and abandoned land reutilization pathways. A case study on riverside landscapes in a mountain area of Spain

open access: yesFrontiers in Forests and Global Change, 2022
The article aims to analyze, based on a multiple case study, the discourses of the individuals that promote social innovation (SI) initiatives for the reuse of abandoned riverside landscapes, connecting SI theory with land reutilization and management ...
Alexia Sanz-Hernández   +7 more
doaj   +1 more source

Climate change conditions the selection of rust-resistant candidate wild lentil populations for in situ conservation

open access: yesFrontiers in Plant Science, 2022
Crop Wild Relatives (CWR) are a valuable source of genetic diversity that can be transferred to commercial crops, so their conservation will become a priority in the face of climate change.
Iciar Civantos-Gómez   +6 more
doaj   +1 more source

A 13-bit, 2.2-MS/s, 55-mW multibit cascade ΣΔ modulator in CMOS 0.7-μm single-poly technology [PDF]

open access: yes, 1999
This paper presents a CMOS 0.7-μm ΣΔ modulator IC that achieves 13-bit dynamic range at 2.2 MS/s with an oversampling ratio of 16. It uses fully differential switched-capacitor circuits with a clock frequency of 35.2 MHz, and has a power consumption of ...
Medeiro Hidalgo, Fernando   +2 more
core   +1 more source

Ciencia en la calle [PDF]

open access: yesRevista Eureka sobre Enseñanza y Divulgación de las Ciencias, 2008
"Ciencia en Acción" (versión española de Science on Stage) está organizado anualmente por CSIC, FECYT, RSEF, RSME y UNED. Cada año, aumenta la calidad y el número de proyectos presentados y 2007 fue el primer año en el que se aceptaron proyectos de ...
Rosa M. Ros
doaj   +1 more source

El estudio de la Fauna Ibérica

open access: yesArbor: Ciencia, Pensamiento y Cultura, 2007
Desde su inicio en 1989, Fauna Ibérica ha impulsado la investigación coordinada de más de 100 taxónomos españoles y extranjeros. El programa, apoyado por la Presidencia del CSIC, está dirigido por el Museo Nacional de Ciencias Naturales.
María Ángeles Ramos Sánchez
doaj   +1 more source

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