Results 31 to 40 of about 577,804 (265)

Laser‐Induced Graphene from Waste Almond Shells

open access: yesAdvanced Functional Materials, EarlyView.
Almond shells, an abundant agricultural by‐product, are repurposed to create a fully bioderived almond shell/chitosan composite (ASC) degradable in soil. ASC is converted into laser‐induced graphene (LIG) by laser scribing and proposed as a substrate for transient electronics.
Yulia Steksova   +9 more
wiley   +1 more source

Validation of an Indicator Model (INCODIES) for Assessing Student Digital Competence in Basic Education

open access: yesJournal of New Approaches in Educational Research, 2020
Digital competence is a basic skill for citizens and should be systematically assessed, taking into account characteristics such as knowledge, skills and attitudes.
Ana García-Valcárcel Muñoz-Repiso   +2 more
doaj   +1 more source

AER Building Blocks for Multi-Layer Multi-Chip Neuromorphic Vision Systems [PDF]

open access: yes, 2005
A 5-layer neuromorphic vision processor whose components communicate spike events asychronously using the address-eventrepresentation (AER) is demonstrated.
Acosta Jiménez, Antonio José   +17 more
core  

An Edible H2O2 Biosensor for Gastrointestinal Metabolites and Peroxidase Enzyme Quantification

open access: yesAdvanced Healthcare Materials, EarlyView.
We present an edible biosensor for gastric fluid analysis that integrates a caffeic acid–horseradish peroxidase redox system into an edible electrolyte‐gated transistor. The device enables rapid, low‐volume detection of H2O2 and, with minimal modification, metabolites and enzyme activity in simulated gastrointestinal conditions.
Valerio Francesco Annese   +10 more
wiley   +1 more source

El urbanita tecno-nómada y la Ciudad excluyente

open access: yes[i2]: Investigación e Innovación en Arquitectura y Territorio, 2020
Partiendo de un análisis de la evolución de la ciudad industrial a la ciudad posindustrial en la era global y desde una perspectiva interdisciplinar, se trata de describir y argumentar cómo la vida urbana se desprende de las estructuras sólidas y ...
Rubén Arturo Cacsire Grimaldos   +1 more
doaj   +1 more source

Digital technology in mathematics education: Why it works (or doesn't) [PDF]

open access: yes, 2012
The integration of digital technology confronts teachers, educators and researchers with many questions. What is the potential of ICT for learning and teaching, and which factors are decisive in making it work in the mathematics classroom? To investigate
Drijvers, Paul
core   +3 more sources

PolyGraph – Flexible, Biocompatible & Electrically Optimized Graphene‐Polymer Composites for Next‐Generation Neural Interfaces

open access: yesAdvanced Healthcare Materials, EarlyView.
PolyGraph, a flexible graphene‐polycaprolactone nanocomposite, unites conductivity, biocompatibility, and processability for next‐generation neural interfaces. Fabricated into microneedle arrays with ultra‐flexible backings, PolyGraph enables bidirectional neuronal recording and stimulation in brain tissue, advancing brain‐computer interface (BCI) and ...
Jack Maughan   +12 more
wiley   +1 more source

Una propuesta para introducir el pensamiento funcional y el concepto de función real [PDF]

open access: yesLogos Ciencia & Tecnología, 2018
El artículo identifica factores importantes en el fracaso de los estudiantes en el primer curso de cálculo diferencial, donde el factor principal fue la carencia del concepto de función.
Carlos Armando Cuevas Vallejo   +2 more
doaj   +1 more source

Self‐Assembled Inorganic Nanomembrane Tubes: Rolled‐Up Piezoelectrics for Microacoustic Wave‐Based Actuators and Sensors

open access: yesAdvanced Materials, EarlyView.
This study demonstrates a self‐assembly process to generate free‐standing piezoelectric nanomembranes, forming ultracompact microtubular acoustic wave sensors and actuators. The miniaturized 3D piezoelectric platform reported in this work can be applied in telecommunication, energy harvesting, and acoustofluidics. Moreover, the 3D self‐assembly can add
Raphaël C. L‐M. Doineau   +9 more
wiley   +1 more source

La Hipertensión Arterial y DOCTUS VIII. Algunas consideraciones

open access: yesRevista Cubana de Cardiología y Cirugía Cardiovascular, 2014
La hipertensión arterial HTA es una de las enfermedades que afecta más frecuentemente a la población adulta en el mundo. Numerosos estudios han demostrado que esta afección está presente en el 20 al 30 % de las personas mayores de 15 años.
Lisandra Nuñez Aguilar
doaj  

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