Beitrage zur Kenntnis der spanischen Sierra Nevada.

Thesis (doctoral)--Friedrich-Wilhelms-Universitat zu Berlin.

Sierra Blanca limestone in Santa Barbara County, California.

Mode of access: Internet.

Terrain features of drainage basins in the Sierra Nevada west-side snow zone /

Mode of access: Internet.

Forest densities, openings, ground cover, and slopes in the snow zone of the Sierra Nevada west-side /

Conducted in cooperation with California Dept. of Water Resources.

Collection and analysis of ground-water samples in the Sierra Vista Basin, Arizona, 1996 /

Mode of access: Internet.

Relation of Canyon Physiography to the incidence of Blister Rust in the Central Sierra Nevada /

Mode of access: Internet.

Costs increase as ritualized fighting progresses within and between phases in the sierra dome spider, Neriene litigiosa

Magnitudes and patterns of energy expenditure in animal contests are seldom measured, but can be critical for predicting contest dynamics and understanding the evolution of ritualized fighting behaviour. In the sierra dome spider, males compete for sexual access to females and their webs. They show three distinct phases of fighting behaviour, escalating from ritualized noncontact display (phase 1) to cooperative wrestling (phase 2), and finally to unritualized, potentially fatal fighting (phase 3). Using CO2 respirometry, we estimated energetic costs of male-male combat in terms of mean and maximum metabolic rates and the rate of increase in energy expenditure. We also investigated the energetic consequences of age and body mass, and compared fighting metabolism to metabolism during courtship. All three phases involved mean energy expenditures well above resting metabolic rate (3.5 X, 7.4 X and 11.5 X). Both mean and maximum energy expenditure became substantially greater as fights escalated through successive phases. The rates of increase in energy use during phases 2 and 3 were much higher than in phase 1. In addition, age and body mass affected contest energetics. These results are consistent with a basic prediction of evolutionarily stable strategy contest models, that sequences of agonistic behaviours should be organized into phases of escalating energetic costs. Finally, higher energetic costs of escalated fighting compared to courtship provide a rationale for first-male sperm precedence in this spider species. (C) 2004 The Association for the Study of Animal Behaviour. Published by Elsevier Ltd. All rights reserved.

Sierra : cooperative request-response for resource management in disasters using semantic web principles

Disasters cause widespread harm and disrupt the normal functioning of society, and effective management requires the participation and cooperation of many actors. While advances in information and networking technology have made transmission of data easier than it ever has been before, communication and coordination of activities between actors remain exceptionally difficult. This paper employs semantic web technology and Linked Data principles to create a network of intercommunicating and inter-dependent on-line sites for managing resources. Each site publishes available resources openly and a lightweight opendata protocol is used to request and respond to requests for resources between sites in the network.

Knowledge and Control in the Contemporary Land Rush : Making Local Land Legible and Corporate Power Applicable in Rural Sierra Leone

13/01/15 Funded by •Faculty of Management at Radboud University Nijmegen

Investing in Peace : Foreign Direct Investment as Economic Restoration in Sierra Leone?

Peer reviewed

Knowledge and Control in the Contemporary Land Rush : Making Local Land Legible and Corporate Power Applicable in Rural Sierra Leone

13/01/15 Funded by •Faculty of Management at Radboud University Nijmegen

Investing in Peace : Foreign Direct Investment as Economic Restoration in Sierra Leone?

Peer reviewed

La vision du monde dans la mythologie maseuale (nahua) de la Sierra Norte de Puebla (Mexique)

Thèse numérisée par la Direction des bibliothèques de l'Université de Montréal.

La vision du monde dans la mythologie maseuale (nahua) de la Sierra Norte de Puebla (Mexique)

Thèse numérisée par la Direction des bibliothèques de l'Université de Montréal.

Territorios campesinos y reforma agraria : el caso de las cooperativas indígenas de la sierra ecuatoriana

En este artículo, se analizan los principales cambios que se han dado en un territorio donde se implementó una reforma agraria en los años sesenta del siglo pasado, lo que permitió el acceso a la tierra por parte de los campesinos indígenas y el inicio de un proceso de "territorialización" sobre un importante espacio rural ubicado en el cantón Cayambe, provincia de Pichincha, Ecuador. Interesa sobre todo resaltar la estrategia campesina de ocupación de un territorio de hacienda y su transformación en un territorio de agriculturas familiares campesinas orientadas a la producción de leche y articuladas con las agroindustrias locales. Este proceso ha significado una mayor complejidad del territorio ahora liderado por una dinámica económica externa, lo que ha generado cambios importantes en las estrategias económicas, sociales y culturales de las familias indígenas.