Search results for "Spatial"
showing 10 items of 2121 documents
On the coupling between agent internal and agent/ environmental dynamics: Development of spatial representations in evolving autonomous robots
2008
In this article we describe how a population of evolving robots can autonomously develop forms of spatial representation which allow them to self-localize and to discriminate different locations of their environment by integrating sensory-motor information over time. The evolving robots also display a remarkable ability to generalize their skill in new environmental conditions that they have never experienced before. The analysis of the obtained results indicates that the evolved robots come up with simple and robust solutions that exploit quasi-periodic limit cycle dynamics emerging from the coupling between the robot/environmental dynamics and a robot's internal dynamics. More specifical…
On the sensitivity of bridge seismic response with local soil amplification
1998
The paper presents a numerical sensitivity study of the local site effects on structural response. Following a recently developed model of spatial coherency and a concept of a simple site coefficient the local site effects are modelled as filtrations of excitation processes with a frequency shift. An analysis of a bridge response with supports founded on different soils is carried out. The joint effects of dynamic response and pseudostatic motion are considered. Two types of response are analysed: longitudinal and transverse. The differences between dynamic displacements and force responses are pointed out.
Viaggiare nell’immaginario. Immaginare il viaggio
2023
The collection of essays in the volume stems from a shared project started during the pandemic with the aim of contributing to the scientific discourse on the concepts of travel, vision and imagination in their broadest meaning.
Los caminos de la gobernanza, Expo Zaragoza 2008 España
2005
Am 16. Dezember 2004 wählte das Bureau international des expositions (B.I.E.) Spanien und seine Kandidatenstadt, die Metropole Saragossa, als Organisationsland für die nächste internationale Ausstellung „International Exhibition of Zaragoza Spain 2008: Water and Sustainable Development“. Wir analysieren zunächst die Entwicklung "der Wege" der Kandidaturen zur Wahl der Gastgeberstadt der Internationalen Ausstellung 2008, dann greifen wir in einem zweiten Mal den gesamten Vorgang der Ausarbeitung, Begründung und Durchführung der Internationalen Ausstellung 2008 in Saragossa auf im Kontext der Globalisierung neue städtische Formen und Formen des Regierens hervorbringen, indem alle finanziellen…
Influence of geographical extent on typology- and model-based assessments of taxonomic completeness of river macroinvertebrates
2009
Summary 1. River InVertebrate Prediction and Classification System (RIVPACS)-type predictive models are increasingly used to assess the biological condition of freshwaters, but management schemes may also be based on a priori groupings of similar water bodies (typologies) to control for natural variation in biota. The two approaches may lead to disagreements of the biological status of a site, depending on, for example, the spatial scale at which assessments are conducted. 2. We used data from 96 reference and 134 potentially impacted sites from Western and Central Finland to compare RIVPACS-type models and a simple size-based typology of rivers for the assessment of taxonomic completeness …
Crisis and restructuration in the Valencian metropolitan area
2015
En el presente artículo presentamos los resultados de un análisis de la estructura socioeconómica del Área Metropolitana de Valencia en 2011 que, en comparación a la existente en 2001, permite apreciar las tendencias recientes de reestructuración territorial. A continuación, se utiliza la tipología territorial hallada como patrón para el análisis de la dinámica reciente de la inversión industrial, una de las variables económicas que ha jugado un papel más importante en la formación del área metropolitana, y que desde distintas instancias viene siendo señalada como un factor estratégico de la recuperación económica. El análisis realizado muestra que, tanto en relación con la actividad indust…
Influence of artificial reefs on the surrounding infauna: Analysis of meiofauna
2002
We adopted a bottom-up approach in studying the effect of two artificial reefs in contrasting environmental conditions (sandy-mud and meso-eutrophic in the Adriatic Sea versus coarse sands and oligotrophic in the Tyrrhenian Sea) on the surrounding environment by assessing changes in the meiofauna. The spatial distribution of meiofaunal assemblages was established along a transect running from within each reef to well outside its direct sphere of influence, along with information on the trophic conditions of sediments (chloropigments, proteins, carbohydrates and total organic matter). Although total densities were significantly higher in the Adriatic than in the Tyrrhenian, the meiofauna dis…
Approche géographique des approvissionnements en plaquettes foréstières des chaufferies du secteur collectif/tertiaire : application au Pays Loue-Lis…
2011
In a context of strong increase of fuelwood demand in the collective sector, the supply issue becomes central to all stakeholders, raising many issues relating to land and forestry planning, local development, environment ... Meanwhile, questions emerge: how much energy can be mobilized sustainably? Does the spatial and structural configuration of forests influence the supply process? Do we seek to minimize transport distances? Can we observe spatial competition between the boilers ? To understand the current organization of supplies, we analyzed two sets of data traceability of wood chips. Then, we have developed a model of local supply basins, considering constraints of renewability of th…
Occurrence of priority pollutants in WWTP effluents and Mediterranean coastal waters of Spain
2011
A comprehensive study aimed at evaluating the occurrence, significance of concentrations and spatial distribution of priority pollutants (PPs) along the Comunidad Valenciana coastal waters (Spain) was carried out in order to fulfil the European Water Framework Directive (WFD). Additionally, PP concentrations were also analysed in the effluent of 28 WWTPs distributed along the studied area. In coastal waters 36 organic pollutants of the 71 analysed, including 26 PPs were detected although many of them with low frequency of occurrence. Only 13 compounds, which belong to four different classes (VOCs, organochlorinated pesticides, phthalates and tributyltin compounds (TBT)) showed a frequency o…
Przestrzenne zmiany w strukturze produkcji rolnej w Unii Europejskiej
2016
Wiele zachodzących zjawisk, ich rozwój czy też kierunki zmian, uzależnione są od przestrzennych interakcji zachodzących pomiędzy sąsiadującymi regionami. Model przestrzennej analizy shift-share, który został wprowadzony do badań przez Nazarę i Hewingsa, przedstawia przestrzennie zmodyfikowane stopy wzrostu (tempa zmian) poszczególnych wariantów zjawiska przez uwzględnienie temp wzrostu zjawiska w obszarach sąsiadujących. Celem artykułu jest analiza zmian struktury towarowej produkcji rolnej w krajach Unii Europejskiej według wybranych rodzajów produktów rolnych z zastosowaniem przestrzennej metody przesunięć udziałów. W opracowaniu dokonano oceny tempa zmian wielkości zjawiska oraz zidentyf…