Results 61 to 70 of about 1,641,177 (226)

Systematic Evaluation of Li3PO4 Coatings on LNMO for Enhanced Cycling Stability using NMR‐Based Interfacial Probes

open access: yesAdvanced Materials Interfaces, Volume 12, Issue 24, December 22, 2025.
This study evaluates three Li3PO4 coating methods (precipitation, sol‐gel and dry sol‐gel) for enhancing the cycling stability of LiMn1.5Ni0.5O4 high‐voltage cathodes. We introduce a coating assesment methodology using solid‐state nuclear magnetic resonance, X‐ray diffraction, and electrochemical testing to assess coating quality.
Jon Serrano‐Sevillano   +8 more
wiley   +1 more source

Crear empresa, una forma de vida y una alternativa de progreso

open access: yesRevista Científica Profundidad Construyendo Futuro, 2014
Este artículo se enfoca en la alternativa y los procesos para crear empresa, analizando las diferentes perspectivas dentro del contexto nacional haciendo un paralelo frente a las posibilidades de búsqueda de empleo en un país emergente como Colombia ...
Mario Andrés Arévalo Meneses
doaj   +1 more source

Políticas alternativas: intuiciones y viabilidades [PDF]

open access: yes, 2006
Este artículo plantea que la construcción de alternativas pretende la recuperación de la capacidad de influencia de sectores sociales, individuos e historias que solo pueden lograr transformaciones escuchándose y actuando colectivamente.
Román-Morales, Ignacio
core  

Simple Detection of Imperfect Charge Extraction at Contacts – Application to Perovskite Solar Cells

open access: yesAdvanced Energy Materials, Volume 15, Issue 48, December 23, 2025.
A novel analytical method is introduced to quantify imperfect charge extraction at solar cell interfaces using internal quantum efficiency measurements under weak and strong absorption. Applied to highly efficient perovskite solar cells, the method reveals imperfect interfacial collection, enabling rapid evaluation and detection of efficiency ...
Kurt Taretto   +8 more
wiley   +1 more source

ECONOMIA DE PERNAMBUCO: PERDA DE DINAMISMO E A NECESSIDADE DE BUSCAR CAMINHOS POSSÍVEIS

open access: yesCadernos de Estudos Sociais, 1993
No contexto da tendência de gradativo isolamento e perda de importância relativa da socio-economia de Pernambuco, esse artigo investiga os principais fatores associados a essa deterioração, num esforço de entendimento que busca também a identificação dos
Frederico Katz, J. Policarpo Lima
doaj  

Alternativas de alimentação para abelhas. [PDF]

open access: yes, 2011
A apicultura é uma atividade essencial para os agricultores familiares. Apesar da diversidade da flora apícola no território nacional, devido à sazonalidade da disponibilidade dos recursos naturais e dos problemas encontrados com a deficiência de ...
PEREIRA, F. de M.
core  

Determination of Paraquat in Real Samples Using a Printed PET‐Based Electrode Modified With Molecularly Imprinted Polymer and Carbonaceous Material

open access: yesElectroanalysis, Volume 37, Issue 12, December 2025.
This study reports the development of an electrochemical sensor printed with graphite‐based ink on a recycled PET substrate. The device was functionalized with a molecularly imprinted polymer (MIP) and multiwalled carbon nanotubes (MWCNTs) for the selective detection of paraquat in water, apple juice, and acerola juice samples, highlighting its ...
Malena Karla Lombello Coelho de Souza   +5 more
wiley   +1 more source

Las alternativas ciudadanas: una propuesta de análisis [PDF]

open access: yes, 2014
El artículo es una propuesta de estudio y difusión sobre las alternativas ciudadanas que están emergiendo y se están implementando en una región de México, la cual puede ser replicada en otras regiones del país o Latinoamérica.
Luengo-González, Enrique
core  

Downconversion Master Slave OCT With a Bidirectional Sweeping Laser

open access: yesJournal of Biophotonics, Volume 18, Issue 12, December 2025.
ABSTRACT This paper explores the challenges of signal processing when using optical coherence tomography (OCT) imaging instruments driven by asymmetric MHz bidirectional sweeping lasers. A downconversion master–slave (DMS) method is proposed as a viable alternative to the traditional OCT protocol.
A. Martinez Jimenez   +8 more
wiley   +1 more source

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