Results 51 to 60 of about 120,449 (190)

El ferrocarril del Plazaola (1914-1953)

open access: yesHuarte de San Juan. Geografía e Historia, 2003
Este artículo trata sobre el ferrocarril del Plazaola, nombre con el que se conoce al ferrocarril de vía estrecha que desde 1914 hasta 1953 unía Pamplona con San Sebastián.
Juan José Martinena
doaj  

El ferrocarril transandino [PDF]

open access: yesARQ (Santiago), 2009
El transporte ferroviario generó en Sudamérica una red que vinculó el interior del continente con los océanos Pacífico y Atlántico y sus puertos. Sorteando la cordillera, una sección de este sistema es la conexión entre Chile y Argentina por el ferrocarril transandino: una empresa de grandes dimensiones que forma parte del paisaje de los Andes.
openaire   +3 more sources

The approximate f-core and the utopia payoff for infinite assignment games [PDF]

open access: yes, 2001
Assignment problems where both sets of agents are countably infinite, the so-called infinite assignment problems, are studied as well as the related assignment games. Further, two solutions for these games are studied.
Llorca, N.   +3 more
core   +1 more source

A new Miconia (Melastomatacaeae) from Bolivia, with remarks on angular-branched species in the Andes [PDF]

open access: yes, 2003
A new species of Melastomataceae frorm Bolivia is described, illustrated and placed in a phenetic context within Miconia, a genus of 1000 species and about 2000 published names.
Beck, Stephan G., Renner, Susanne S.
core   +1 more source

How the Sima de los Huesos was won

open access: yesThe Anatomical Record, Volume 307, Issue 7, Page 2225-2245, July 2024.
Abstract Although the first discovery of a human fossil in the Sima de los Huesos took place in 1976, systematic excavations did not begin there until 1984. Since then, this site has been continuously excavated in month‐long camps. The site is dated by different radiometric techniques to between 430,000 and 300,000 years ago.
Juan‐Luis Arsuaga   +10 more
wiley   +1 more source

FEMINIZATION OF NILE TILAPIA Oreochromis niloticus (L.) BY DIETHYLSTILBESTROL GROWTH AND GONADOSOMATIC INDEX/Feminización de la tilapia del nilo Oreochromis niloticus (L.) mediante dietilestilbestrol. Crecimiento e índice gonadosomático

open access: yesEcosistemas y Recursos Agropecuarios, 2016
Sex-reversal by exogenous hormones is the most common technique used to generate monosex populations of Nile tilapia (Oreochromis niloticus). However, this technique has provoked a negative perception in recent years.
José Antonio Marín-Ramírez   +4 more
doaj  

Sistematización de las principales implicaciones provocadas por el ferrocarril central en Camagüey (1902-1925)

open access: yesIslas, 2023
Introducción: La llegada del Ferrocarril Central a Camagüey en 1902 constituye un acontecimiento significativo para el desarrollo socioeconómico de la provincia entre 1902 y 1925; sin embargo, se constata que aún existe un insuficiente conocimiento ...
Alberto Frómeta Dupuy   +1 more
doaj  

Spanish adaptation and validation of the Dula Dangerous Driving Index (DDDI)

open access: yesAggressive Behavior, Volume 50, Issue 1, January 2024.
Abstract The Dula Dangerous Driving Index (DDDI) is a widely used questionnaire that measures the tendency to drive dangerously on the road through three different types of behaviors: aggressive driving, risky driving, and experiencing negative emotions while driving.
María T. Sánchez‐López   +3 more
wiley   +1 more source

Planeación de Trayectorias de un Robot Móvil Basado en Redes Bayesianas

open access: yesProgramación Matemática y Software, 2018
Este trabajo describe los resultados de la implementación de un modelo de Redes Bayesianas como parte del sistema de navegación en un robot móvil, el cual tiene como misión llegar a un objetivo predeterminado conociendo su posición inicial pero no su ...
Carlos Ceballos Castillo   +2 more
doaj  

The development of a hydrogeological conceptual model of groundwater and surface water flows in the Silala River Basin

open access: yesWIREs Water, Volume 11, Issue 1, January/February 2024.
The Silala basin hydrogeological conceptual model amalgamates geological mapping, borehole logs, satellite imagery, geophysical surveys, pumping tests, hydrogeochemical analyses, and groundwater level and surface flow monitoring. This understanding of the aquifer system, groundwater levels, hydraulic parameters, flowpaths, recharge inputs, and ...
Denis Peach, Adam Taylor
wiley   +1 more source

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