Results 21 to 30 of about 392,788 (215)

Bornhardts, Bloques e Inselbergs [PDF]

open access: yes, 1995
[Abstract] Bornhardts are steep-sided domical hills. The profiles are associated with sheet fractures, and their plan form with steeply dipping fractures of orthogonal or rhomboidal systems.
Twidale, C. R.
core   +1 more source

The Popular Economy and Its Critics: Cooperation and Contradiction in the Sandinista Welfare‐Developmentalist State

open access: yesAntipode, Volume 58, Issue 2, 2026.
ABSTRACT The popular economy is a subjective economic community in Nicaragua. It is sustained by the imaginative and material labors of worker‐producers organized in households, cooperatives, and other self‐managing associations. This article demonstrates the popular economy's importance to the format of work, wealth, and welfare in contemporary ...
Jonah Walters
wiley   +1 more source

Charles Darwin y las glaciaciones más antiguas de Patagonia: los bloques erráticos del alto valle del Río Santa Cruz [PDF]

open access: yes, 2009
Although the depositational environment assigned by Darwin to the large erratic blocks and gravels in the Río Santa Cruz valley has been reinterpreted, his geomorphological and stratigraphic observations are still in force.
Malagnino, Eduardo Cayetano   +1 more
core  

Roots of resilience: Assessing child and adolescent nature connectivity in the Mediterranean Region of Murcia (Spain)

open access: yesPeople and Nature, Volume 8, Issue 2, Page 378-391, February 2026.
Abstract Children today spend less time outdoors than previous generations, with potential consequences for health, learning and pro‐environmental attitudes. We assessed children's connection with and exposure to nature in a Mediterranean setting using the Nature Connection and Experience Index (NCEI), a composite measure that integrates an affective ...
Juan Antonio Ortega‐García   +6 more
wiley   +1 more source

Una revisión de los métodos de remuestreo en series temporales. [PDF]

open access: yes, 2002
Desde Efron y Tibshirani (1986), se han propuesto varios métodos de remuestreo para datos temporales. En este artículo, presentamos los principales métodos de remuestreo desarrollados para series temporales, centrándonos en el jackknife por bloques ...
Alonso, Andrés M.   +2 more
core   +2 more sources

Improving the Energy Efficiency of a Photovoltaic System by Optimizing the Modulation System

open access: yesEnergy Science &Engineering, Volume 13, Issue 12, Page 6322-6331, December 2025.
Basic structure of photovoltaic system ABSTRACT The efficiency of a photovoltaic conversion chain depends heavily on the essential elements constituting the chain, in particular the photovoltaic generator, the maximum power point tracking technique used, the modulation system used to generate the control signals for static converter serving as an ...
Emmanuel Tchindebe   +6 more
wiley   +1 more source

Análisis y resistencia mecánica de diferentes tipologías de bloques de hormigón y su uso en edificación según su espesor y composición química [PDF]

open access: yes, 2016
112 p.La construcción con bloques huecos de hormigón como elementos de albañilería, cada día se utilizan más a lo largo del mundo, debido a su gran versatilidad y rapidez de ejecución en obra.
Asenjo Fuenzalida, María Inés   +1 more
core   +1 more source

Spain: Political Developments and Data in 2024

open access: yesEuropean Journal of Political Research Political Data Yearbook, Volume 64, Issue 1, Page 581-598, December 2025.
Abstract In Spain, the year 2024 was marked by both regional and European elections and an increasingly difficult political environment for the left‐wing governing coalition. The political agenda was dominated by these elections, an Amnesty Law, and several accusations of corruption around the governing Socialist Party (Partido Socialista Obrero ...
ASBEL BOHIGUES, MARIANA SENDRA
wiley   +1 more source

Integración de bloques IP en diseños SoC [PDF]

open access: yes, 2002
La metodología de diseño de sistemas SoC basándose en bloques IP (Hard o Soft) presenta diversos retos, desde las cuestiones relativas a la síntesis y validación de cada bloque IP, hasta las características de integración física y verificación funcional ...
Bria, Oscar N.   +1 more
core  

On Bipartite Biregular Large Graphs Derived From Difference Sets

open access: yesJournal of Graph Theory, Volume 110, Issue 2, Page 174-181, October 2025.
ABSTRACT A bipartite graph G = ( V , E ) with V = V 1 ∪ V 2 is biregular if all the vertices of each stable set, V 1 and V 2, have the same degree, r and s, respectively. This paper studies difference sets derived from both Abelian and non‐Abelian groups.
Gabriela Araujo‐Pardo   +3 more
wiley   +1 more source

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