Becchetti L., De Panizza A. and Oropallo F. (2007) Role of industrial district externalities in export and value-added performance: evidence from the population of Italian firms, Regional Studies 41, 601-621. The paper tries to shed light on the export and value-added performance of industrial districts by integrating information on the population of Italian firms (from the ASIA database of the Italian Statistical Institute) with balance sheet data for all limited-liability companies in selected manufacturing industries. The findings show that firms located in industrial districts (specialized or not in the leading manufacturing activity of the district) export more and have higher added value than firms located elsewhere, net of the impact of relevant controls. The robustness check undertaken on the agglomeration-performance nexus detects, as expected, a significant relationship between dichotomous district indicators and (global and industry-specific) continuous measures of agglomeration and specialization. Export and value-added performance results are confirmed when proxying location in industrial districts with these continuous variables and when considering the weight of subcontracting and outsourcing activities of productive units as additional controls. Becchetti L., De Panizza A. et Oropallo F. (2007) Le role des effets externes industriels dans les performances des exportations et de la valeur ajoutee: des preuves aupres des entreprises italiennes, Regional Studies 41, 601-621. Cet article cherche a eclaircir les performances des exportations et de la valeur ajoutee des districts industriels en integrant des donnees aupres du parc d'entreprises italiennes (la base de donnees ASIA de l'Institut italien de la statistique) a un bilan pour toute societe a responsabilite limitee dans certains secteurs industriels. Il s'avere que les entreprises situees dans des districts industriels (qu'elles se specialisent dans l'activite phare industrielle du district ou non) exportent plus et jouissent d'une valeur ajoutee plus elevee que ne le font les entreprises situees ailleurs, compte tenu de l'impact des controles en cours. Le controle de solidite fait sur la connexion agglomeration-performances laisse voir, comme prevu, un important rapport entre des indicateurs dichotomiques des districts et des mesures d'agglomeration et de specialisation continues (a la fois globales et specifiques). Si l'on assume des emplacements dans des districts industriels a partir de ces variables continues, et que l'on considere le poids de la sous-traitance et des approvisionnements externes des etablissements productifs comme des controles supplementaires, les performances des exportations et de la valeur ajoutee sont confirmees. Mesures d'agglomeration geographique Districts industriels Performances des exportations Becchetti L., De Panizza A. und Oropallo F. (2007) Die Rolle der Externalitaten von industriellen Bezirken fur die Export- und Wertsteigerungsleistung: Belege aus der Bevolkerung italienischer Firmen, Regional Studies 41,...

No abstract

[1] Tephra fall is a relevant hazard of Campi Flegrei caldera (Southern Italy), due to the high vulnerability of Naples metropolitan area to such an event. Here, tephra derive from magmatic as well as phreatomagmatic activity. On the basis of both new and literature data on known, past eruptions (Volcanic Explosivity Index (VEI), grain size parameters, velocity at the vent, column heights and erupted mass), and factors controlling tephra dispersion (wind velocity and direction), 2D numerical simulations of fallout dispersion and deposition have been performed for a large number of case events. A bayesian inversion has been applied to retrieve the best values of critical parameters (e.g., vertical mass distribution, diffusion coefficients, velocity at the vent), not directly inferable by volcanological study. Simulations are run in parallel on multiple processors to allow a fully probabilistic analysis, on a very large catalogue preserving the statistical proprieties of past eruptive history. Using simulation results, hazard maps have been computed for different scenarios: upper limit scenario (worst-expected scenario), eruption-range scenario, and whole-eruption scenario. Results indicate that although high hazard characterizes the Campi Flegrei caldera, the territory to the east of the caldera center, including the whole district of Naples, is exposed to high hazard values due to the dominant westerly winds. Consistently with the stratigraphic evidence of nature of past eruptions, our numerical simulations reveal that even in the case of a subplinian eruption (VEI = 3), Naples is exposed to tephra fall thicknesses of some decimeters, thereby exceeding the critical limit for roof collapse. Because of the total number of people living in Campi Flegrei and the city of Naples (ca. two million of inhabitants), the tephra fallout risk related to a plinian eruption of Campi Flegrei largely matches or exceeds the risk related to a similar eruption at Vesuvius.

TÉCNICAS DE INTERPRETAÇÃO VISUAL DE IMAGENS Resumo Hoje, as imagens de satélite e fotografias aéreas fazem parte do cotidiano. Elas estão em todas as mídias. Isso vem favorecendo o treinamento do leitor a ver a paisagem de uma maneira diferente, do alto e, assim, aumentar seu campo de visão. A observação das paisagens realiza-se de diferentes formas e cada uma favorece a identificação e a interpretação de objetos ou fenômenos. As técnicas de interpretação visual de imagens são amplamente utilizadas nos estudos sobre as paisagens. Elas exigem, porém, treinamento do usuário. Este artigo apresenta um roteiro metodológico que contém critérios bem definidos e adaptados para a interpretação visual tanto de fotografias aéreas quanto de imagens de satélite e uma proposta de exercício didático aplicada ao ensino da Geografia.

Previous and new results from probabilistic approaches based on available volcanological data from real eruptions of Campi Flegrei, are assembled in a comprehensive assessment of volcanic hazards at the Campi Flegrei caldera, in order to compare the volcanic hazards related to the different types of events. Hazard maps based on a very wide set of numerical simulations, produced using field and laboratory data as input parameters relative to the whole range of fallout and pyroclastic-flow events and their relative occurrence, are presented. The results allow us to quantitatively evaluate and compare the hazard related to pyroclastic fallout and density currents (PDCs) in the Campi Flegrei area and its surroundings, including the city of Naples.Due to the dominant wind directions, the hazard from fallout mostly affects the area east of the caldera, and the caldera itself, with the level of probability and expected thickness decreasing with distance from the caldera and outside the eastern sectors. The hazard from PDCs decrease roughly radially with distance from the caldera centre and is strongly controlled by the topographic relief, which produces an effective barrier to propagation of PDCs to the east and northeast, areas which include metropolitan Naples. The main result is that the metropolitan area of Naples would be directly exposed to both fallout and PDCs. Moreover, the level of probability for critical tephra accumulation by fallout is relatively high, even for moderate-scale events, while, due to the presence of topographic barriers, the hazard from PDCs is only moderate and mostly associated with the largest events.

RESUMOEste artigo apresenta os diferentes aspectos da proteção do ambiente litorâneo abordando três pontos essenciais. O primeiro evoca a instalação de áreas marinhas protegidas (AMP) em um contexto socioeconômico e político, destacando seu funcionamento e a noção de "efeito reserva". O segundo mostra a importância das AMP na proteção da biodiversidade marinha. Finalmente, o terceiro ponto exemplifica a avaliação do meio natural e aborda, de maneira geral, o valor econômico das espécies e da "Natureza" na ocorrência de degradação. Palavras-chave:Meio ambiente, avaliação, gestão, áreas marinhas protegidas (AMP), litoral. ABSTRACTThis article presents the various aspects of the littoral environmental protection by approaching three important points. The first evokes the installation of the marine surfaces protected in a socio-economic and political context. The operation of the reserves and the concept of "reserve effect " are explained. The second explains the interest of MPA to protect the marine biodiversity. Lastly, the third point shows the evaluation of the natural environment and more generally of the economic value of the species and "Nature" in the event of degradation.

No abstract

xiii Introdução Geral 1 Apresentação 2 Objetivos e Hipóteses 3 Parte I-Geografia e Sensoriamento Remoto: conceitos e técnicas 7 Capítulo 1: A Geografia 9 1.1. Os Olhares Geográficos 1.2. A Paisagem e o Espaço Geográfico 1.3. Uma Dupla Lógica: meio natural e espaço humano Capítulo 2: Técnicas e Metodologias 2.1. Sensoriamento Remoto e Sistema de Informação Geográfica (SIG) 2.2. Cartografia e Sucessão Escalar 2.3. A Coremática Parte II-O Litoral Norte do Estado de São Paulo: história, natureza e ocupação humana Capítulo 3: A Formação do Espaço Litorâneo 3.1. Os Traços da História 3.2. As Particularidades do Espaço Litorâneo 3.3. A Natureza Onipresente Capítulo 4: Os Fatores e Conseqüências da Organização do Espaço Litorâneo 4.1. O Fenômeno da Residência Secundária 4.2. A Degradação do Meio 4.3.