Results 31 to 40 of about 544,185 (286)

¿Quo Vadis? Reclutamiento y Contratacion de Trabajadores Migrantes y su Acceso a la Seguridad Social: dinamicas de los sistemas de trabajo temporal migratorio en Norte y Centroamerica [PDF]

open access: yes, 2013
Different regions and countries of the world face a serious need to design and make use of necessary policies and resources to better manage worker migration, thus ensuring the welfare and human rights of these people who, in the end, are of benefit to ...
Alejandra Costanza, Gisele Lisa Bonnici
core  

Shape‐Changing Multiphase Microparticles from Complex Liquid Crystal Emulsions

open access: yesAdvanced Functional Materials, EarlyView.
Liquid crystalline network (LCN) microparticles are prepared from single, double (Janus), and triple emulsions through a simple and scalable bulk‐emulsification strategy. Under heating, the particles exhibit robust, reversible, large‐amplitude deformations that depend both on the morphology and the liquid crystals director field configuration.
Marco Turriani   +3 more
wiley   +1 more source

Gobiernos y estrategias de coalición en democracias presidenciales: el caso de América Latina Gobiernos y estrategias de coalición en democracias presidenciales: el caso de América Latina

open access: yesPolítica y Sociedad, 2003
The scholarly literature on presidentialism and parliamentarism in modern comparative politics has argued that the combination of presidential government and a multiparty system is problematic. In multiparty systems, of course, the formation of coalition
Antonio Garrido
doaj  

A Tri‐Culture Heart‐on‐a‐Chip Platform With iPSC‐Derived Cardiac Cells for Predictive Cardiotoxicity Testing

open access: yesAdvanced Healthcare Materials, EarlyView.
This study presents the first entirely isogenic heart‐on‐chip, unifying cardiomyocytes, fibroblasts, and endothelial cells from a single iPSC source. The platform reveals a critical biological insight: the endothelium actively shields cardiac tissue from drug‐induced toxicity, challenging the predictive accuracy of conventional, avascular models for ...
Karine Tadevosyan   +12 more
wiley   +1 more source

De la gestión de crisis a la crisis de gestión: responsabilidad y democracias liberales en el estallido de la pandemia de la COVID-19

open access: yesArbor: Ciencia, Pensamiento y Cultura
El estallido de la pandemia de la COVID-19 conmocionó a las sociedades de todo el mundo. En su esfuerzo por adaptar sus respuestas a la crisis a sus propias condiciones de supervivencia, los gobiernos tendieron desde el principio a recurrir a argumentos
Branislav Radeljić   +1 more
doaj   +1 more source

Spiro‐Phenothiazine Hole‐Transporting Materials: Unlocking Stability and Scalability in Perovskite Solar Cells

open access: yesAdvanced Materials, EarlyView.
Fluorene‐functionalized spiro‐phenothiazine (PTZ‐Fl) exhibits strong Li+ affinity and thermal stability, enabling a PCE of 25.75% in small‐area cells and 22.07% in 25 cm2 modules. Under ISOS‐L3 conditions, PTZ‐Flbased devices retain over 80% efficiency after 1000 hours, demonstrating superior stability and scalability compared to spiro‐OMeTAD for next ...
Javier Urieta‐Mora   +17 more
wiley   +1 more source

Gestión pública y desarrollo del Departamento de Puno

open access: yesSemestre Economico, 2022
El objetivo del estudio, fue analizar y explicar las implicancia que ha tenido la gestión pública subnacional (gobiernos locales y gobierno regional) en el desarrollo del departamento de Puno.
Alcides Huamani Peralta
doaj   +1 more source

El frágil y pendular entendimiento entre Venezuela y Colombia [PDF]

open access: yes, 2008
Bajo los gobiernos de Álvaro Uribe y Hugo Chávez, entre Venezuela y Colombia se ha reforzado una relación político-diplomática inestable y pendular que no sólo mantiene en jaque la buena marcha de las relaciones bilaterales sino la precaria estabilidad ...
Teresa Romero, María
core  

Stepwise On‐Surface Synthesis and Transformations of Two‐Dimensional Covalent Organic Frameworks by Controlled Thermal Stimuli

open access: yesAdvanced Materials, EarlyView.
The seminal transformation of a 2D‐COF (SURFCOF‐IMDEA1) into a 2D porous COF (SURFCOF‐IMDEA2) on Au(111) by a sequential C‐C coupling and ladderization triggered by thermal annealing steps at increasing temperatures is reported. Abstract The development of covalent organic frameworks (COFs) is currently a primary objective in materials science, taking ...
Ana Barragán   +11 more
wiley   +1 more source

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