Results 131 to 140 of about 76,127 (246)

Unleashing the Power of P‐N Heterojunctions: Optimizing Water Electrolysis Efficiency Through a Cathode‐Driven Electrocatalyst Synergy

open access: yesAdvanced Science, EarlyView.
This groundbreaking contribution to water electrolysis demonstrates that MoSe2/PANI electrocatalysts with a P–N heterojunction effectively balance the overall electrolysis reaction as the cathode, enhance anode performance, and achieve high‐efficiency, low‐energy, simultaneous hydrogen and oxygen production, revealing that the P–N heterojunction ...
Kumasser Kusse Kuchayita   +2 more
wiley   +1 more source

Comprensión de la sintaxis del álgebra en tangentes a las cónicas con el método de descartes [PDF]

open access: yes, 2012
Este artículo forma parte de la investigación maestría de la autora. En este artículo se identifican qué tendencias cognitivas presentan estudiantes de bachillerato cuando se enfrentan al tema de tangentes a las cónicas en un curso de Geometría Analítica
Delfín, Samantha
core  

Defect Driven Electronic Structure Reconfiguration and Hierarchical Phonon Suppression in Ag2Se Thermoelectrics

open access: yesAdvanced Science, EarlyView.
Indium substitution in Ag2Se nanocrystals simultaneously tailors electronic structure and lattice dynamics. Fermi‐level upshift and band‐gap narrowing enhance electrical transport, while defect‐induced lattice softening intensifies phonon scattering and suppresses lattice thermal conductivity.
Yineng Gou   +11 more
wiley   +1 more source

Las TIC´s como herramientas cognitivas en el desarrollo de la habilidad de resolución de desigualdades cuadráticas [PDF]

open access: yes, 2009
Se expone una propuesta didáctica que propicie en los alumnos universitarios la adquisición de un aprendizaje significativo de desigualdades cuadráticas.
Guajardo, Elizabeth, López, Lilia
core   +1 more source

Electrostatic Self‐Assembly Induced Nest‐Like MXene Networks on Fabric for Ultra‐Broadband Flexible Absorption

open access: yesAdvanced Science, EarlyView.
In this study, an electrostatically self‐assembled WPU‐MXene@FC flexible fabric constructs a “nest‐like” structure on fibers, building construct MXene multiple loss paths, achieving ultra‐wideband absorption of 25.3–1200 GHz in a thickness of 1.8 mm, while also exhibiting superhydrophobicity, acid and alkali resistance, and bending resistance ...
Min Luo   +7 more
wiley   +1 more source

Un enfoque didáctico al estudio de los lugares geométricos en Cabri [PDF]

open access: yes, 2007
Este taller consiste en estudiar en primera instancia, de qué manera la noción de lugar geométrico permite abordar problemas de construcción geométrica desde un punto de vista instrumental, en el sentido que dicha noción entra a jugar un papel como
Fernández-Mosquera, Edinsson
core  

Multi‐Channel Electrically Tunable Varifocal Metalens With Compact Multilayer Polarization‐Dependent Metasurfaces and Liquid Crystals

open access: yesAdvanced Science, EarlyView.
A compact eight‐channel electrically tunable varifocal metalens with three single‐layer polarization‐multiplexed bi‐focal metalens and three LC cells. The total thickness of the device is ∼6 mm, while the focal lengths can be switched among eight values (3.6, 4.2, 4.5, 4.9, 6.2, 6.9, 8.4, and 9.6 mm). ABSTRACT As an essential module of optical systems,
Zhiyao Ma   +11 more
wiley   +1 more source

Dynamic Analysis of Point Contact Gears with Circular-parabola Configuration Based on Adams Software

open access: yesJixie chuandong
Taking the point contact gear with circular-parabola configuration as the research object, based on the Adams dynamic analysis software, dynamic characteristics and the variable law of tooth surfaces are studied in this study. Firstly, according to space
Liang Dong   +4 more
doaj  

Significados elementales y sistémicos de una ecuación de segundo grado [PDF]

open access: yes, 2008
El presente trabajo consistió en caracterizar los significados elementales y sistémicos a los protocolos de respuestas dadas por un estudiante sobre ecuaciones de segundo grado y los puestos de manifiesto, en relación al mismo tema, por los autores del ...
Arrieche, Mario José, Capace, Luis
core  

Emergence of Double‐Dome Superconductivity in the Pressurized Dirac Semimetal BaMg2Bi2

open access: yesAdvanced Electronic Materials, EarlyView.
ABSTRACT Dirac semimetal BaMg2${\rm BaMg}_{2}$Bi2${\rm Bi}_{2}$ is reported to be a unique topological material that manifests surface superconductivity that coexists with bulk band topology at ambient pressure. Here, we present a comprehensive investigation of high‐pressure superconducting properties in BaMg2${\rm BaMg}_{2}$Bi2${\rm Bi}_{2}$ single ...
Qi Wang   +5 more
wiley   +1 more source

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