1,720,966 research outputs found
New technologies and the future of cities
Get PDFΟ εικοστός πρώτος αιώνας έχει χαρακτηριστεί ως αιώνας της μεγάλης αστικοποίησης, καθώς υπολογίζεται ότι μέχρι το τέλος του αιώνα αυτού ο πληθυσμός των αστικών περιοχών θα φθάσει το 85 τοις εκατό του συνολικού πληθυσμού. Οι πόλεις έχουν μία ιδιαίτερη σχέση με τις νέες τεχνολογίες και ο όρος που κυριαρχεί στην σχέση πόλεων και νέων τεχνολογιών είναι οι «έξυπνες πόλεις». Ο όρος αυτός άρχισε να χρησιμοποιείται από την δεκαετία του ενενήντα και αναφερόταν κυρίως στην σύνδεση διαφόρων κοινοτήτων και περιοχών με τις νέες τεχνολογίες. Πλέον ο όρος μπορεί να αναφέρεται στην χρήση των νέων τεχνολογιών για την βελτίωση των αστικών μεταφορών, της κοινωνικής ζωής, του αστικού περιβάλλοντος, αλλά και στην διασύνδεση και διοίκηση των πόλεων, καθώς και στην ίδια των «εικόνα» των πόλεων. Πολλές πόλεις έχουν εφαρμόσει νέες τεχνολογίες σε πολλούς τομείς της οικονομικής και κοινωνικής ζωής μέσω συγκεκριμένων πολιτικών. Η εφαρμογή τέτοιων νέων τεχνολογιών ήδη έχει βελτιώσει την οικονομική και κοινωνική ζωή, ταυτόχρονα όμως έχει προκύψει και μια σειρά προβλημάτων τα οποία θα πρέπει να αντιμετωπιστούν.The twentieth first century has been labeled as the “metropolitan century, as it is expected that the urban population will reach the eighty five percent of the total population by the end of the century. New technologies play a crucial role in urban environment, and this role is succinctly described by the term “smart cities”. This term first appeared during the nineties and mainly referred to the interconnection of communities and localities. Recently the term encompasses the use of new technologies in activities ranging from urban transportation, the improvement of social life and urban environment, as well as, the urban administration and the city image. Many city authorities have used specific policies in the application of new technologies in a broad array of social and economic life. New technologies have already had a positive impact on urba
Immigrant Population in a New Host-Region: Differences and Similarities Across Southern European Countries
Get PDFDuring the last two decades, Southern Europe has become a destination region for migrants, as a result of demographic, economic and social developments across Eastern and Southern Europe. A number of common characteristics have been put forward to explain the unexpected and simultaneous transformation of this part of Europe into an appealing destination for new migratory flows. Those common explanatory factors of the reasons why immigrants are attracted to countries in Southern Europe have led to the development of the so-called "Southern European model of migration", while the examination of immigrants' personal characteristics across Greece, Italy and Spain reveals some interesting differences. This paper sheds light on who the immigrants are, their specific characteristics, how they are spatially distributed and the causal factors of this distribution- the latter through the use of regression analysis
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Duality theory and cost function analysis in a regional context: the impact of public infrastructure capital in the Greek Regions
Get PDFThere has been a significant resurgence of interest in the effects of public capital on the economic fortunes of the private sector of late. This renewed concern was sparked by the research of Aschauer on US infrastructure and the ensuing debate between himself, Munnell and Holtz-Eakin. This debate and much of the subsequent work in the US and elsewhere has been conducted utilising production functions. There is, however, another potentially more rewarding strand in the infrastructure literature that is based on duality theory and cost function analysis. This approach has been thought of as overcoming some of the methodological problems inherent in the use of production functions in this research context. This paper, using cost functions, attempts to estimate the impact of the productive categories of the Public Investment Programme of Greece on regional development, and especially on large scale manufacturing activities. The results demonstrate that public capital has a significant positive impact on the performance of the private sector, and reduces private costs of production. Also considered here are the links between infrastructure provision and private sector input factors of production
Variations on the Author
Get PDF“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
The Regional Dimension of Migration in Greece - Spatial Patterns and Causal Factors
Get PDFSince the nineties, Greece, like other Southern European countries, has changed from being a country of migratory origin to a destination country for migrants. This, in itself, has been the result of fundamental political and economic reforms across Eastern Europe, as well as of demographic and economic developments within Greece. The first officially available data on migrants in Greece – country of origin, employment, education level or marital status- had been extracted from the 2001 population census. There are interesting points to be made regarding their spatial distribution. Migrants of Albanian origin, the most heavily represented migrant ethnic group, have a more or less even distribution across Greek regions. However, migrants of other ethnic origin seem to cluster in different regions. The first part of this paper offers a panorama of how migrants are dispersed across Greece in respect with their country of origin. This is followed by an attempt to identify the causal economic, social, and demographic factors of the spatial distribution of migration using various econometric tools, including spatial regression
Appropriate Similarity Measures for Author Cocitation Analysis
Get PDFWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
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