Results 31 to 40 of about 516,341 (230)

ESTIMACIÓN ESTADÍSTICA BASADA EN UN DISEÑO MUESTRAL MULTIETÁPICO (ESTUDIO DE MYPES)

Tecnociencia, 2022
El siguiente artículo presenta en lenguaje formal-matemático la aplicación del diseño de muestreo multietápico con su respectivo estimador con la finalidad de construir la noción de estrategia de muestreo y recomendarla en un estudio con encuesta para ...
René Bracho
doaj  

Flexoelectrically Induced Polar Topology in Twisted SrTiO3 Membranes

Advanced Materials, EarlyView.
Twisted SrTiO3 bilayers host polar vortices of flexoelectric origin, revealed through combined experiment and theory. By reconstructing polarization from the toroidal moment of strain gradients, the work establishes a 3D chiral state with broken inversion and mirror symmetries.
Isabel Tenreiro, Hugo Aramberri, Víctor Rouco, Gabriel Sánchez‐Santolino, Mariona Cabero, Fernando Gallego, David Sánchez‐Manzano, José M. González‐Calbet, Federico Mompeán, Mar García‐Hernández, Alberto Rivera‐Calzada, Jorge Íñiguez‐González, Carlos León, Jacobo Santamaría   +13 more
wiley   +1 more source

Gapless Superconductivity From Extremely Dilute Magnetic Disorder in 2H‐NbSe2‐xSx

Advanced Materials, EarlyView.
We demonstrate that 2H‐NbSe2‐xSx hosts gapless superconductivity at unexpectedly low magnetic impurity concentrations. Combining STM, Bogoliubovde Gennes simulations, DFT, and quasiparticle interference, we comprehensively study the development of gapless behavior and show that SeS substitution reshapes the band structure, enhances nesting, and drives ...
Jose Antonio Moreno, Mercè Roig, Víctor Barrena, Edwin Herrera, Alberto M. Ruiz, Samuel Mañas‐Valero, Antón Fente, Anita Smeets, Jazmín Aragón, Yanina Fasano, Beilun Wu, Maria N. Gastiasoro, Eugenio Coronado, José J. Baldoví, Brian M. Andersen, Isabel Guillamón, Hermann Suderow   +16 more
wiley   +1 more source

Estrategias hacia la sostenibilidad en el Mercosur [PDF]

, 2005
Se analiza brevemente el proceso de avance de la economía ecológica en el marco de la conformación de sociedades regionales en América Latina. La creación de la Sociedad Brasileña de Economía Ecológica, la Asociación Argentino Uruguaya de Economía ...
Morello, Jorge, Pengue, Walter A., Rodríguez, Andrea   +2 more
core   +1 more source

Microbial Contribution to Soiling and Its Impact on Photovoltaic Module Soiling in Arid Zones of the Atacama Desert

Advanced Sustainable Systems, EarlyView.
Microorganisms colonizing photovoltaic surfaces in the Atacama desert form biofilms that enhance particle adhesion and reduce energy yield. This study identifies UV‐resistant bacteria and carotenoid‐producing strains that interfere with PV performance.
Douglas Olivares, Ricardo Ortíz, Luis Rojas‐Araya, María Teresa Mata, Felipe Galleguillos, Jaime Llanos, Carlos Portillo, Valentina Escobar, Aitor Marzo   +8 more
wiley   +1 more source

Reserva Forestal El Montuoso: Vinculación económica de las comunidades de influencia con su ecosistema

Visión Antataura, 2018
Utilizando un muestreo estratificado por conglomerado, se analizó la vinculación económica de las comunidades con la Reserva Forestal El Montuoso (RFM).
María E. Pedreschi M., Adys Pereira de Herrera, Dimas Arcia   +2 more
doaj  

Assessing Photovoltaic Recycling Capacities and Policy Gaps in the European Union

Advanced Energy and Sustainability Research, EarlyView.
This study maps photovoltaic recycling capacity in the EU and key global regions, highlighting gaps between growing waste volumes and available infrastructure. It combines survey insights and policy analysis to identify recycling bottlenecks and offers recommendations to boost circularity in the solar sector.
Nieves Espinosa, Silvia Bobba, Cynthia E. L. Latunussa, Enrica Leccisi   +3 more
wiley   +1 more source

Modelo de emprendimiento universitario: Una propuesta para la Universidad de Panamá

Visión Antataura, 2018
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María Esther Pedreschi
doaj  

Trends in horizontal inequity in access to public health care services by immigrant condition in Spain (2006–2017)

International Journal for Equity in Health, 2019
Background The objective of this research is to analyse trends in horizontal inequity in access to public health services by immigration condition in Spain throughout the period 2006–2017.
Jaime Pinilla, Miguel A. Negrín, Ignacio Abásolo   +2 more
doaj   +1 more source

The effect of policies regulating tobacco consumption on smoking initiation and cessation in Spain: is it equal across socioeconomic groups?

Tobacco Induced Diseases, 2017
Introduction In Spain, the Law 28/2005, which came into effect on January 2006, was a turning point in smoking regulation and prevention, serving as a guarantee for the progress of future strategies in the direction marked by international organizations.
Jaime Pinilla, Ignacio Abásolo
doaj   +1 more source