131,161 research outputs found
The political use of the internet: Some insights from two surveys of Italian students
No full textInterest in the Internet's impact on political participation has grown over the last five years. The main claim of most social scientists is to consider the Internet as a new resource for political engagement. However, this claim has not always been backed up by empirical analysis. The aim of this article is to provide empirical evidence on a subject that previous surveys on the Internet have generally ignored: the influence of individual political characteristics on Internet use. The authors compare data from two distinct surveys, carried out in two different periods but which contain some common batteries of questions referring to political participation and Internet use for political purposes. One survey was carried out in 2001 and focused on students at the University of Florence. The second was carried out in 2002 and focused on the participants in the European Social Forum in Florence. The empirical results and interpretations offered are based on a sample of 397 students, extracted from the two databases. The focus of the research is on exploring whether and how the political use of the Internet is shaped by the political characteristics of users, in this case students. The findings of the two studies suggest that, firstly, the more students are engaged in different social and political organizations, the more they use the Internet to achieve political purposes; and, secondly, that different styles of Internet use (to retrieve alternative information, to discuss and to perform political actions) are associated with the political characteristics of users. In particular, the characteristics of offline participation are reproduced online: the Internet is appropriated and shaped by political practices of users
Youth online: Researching the political use of the Internet in the Italian context
No full textBetween the end of the 1980s and the beginning of the last decade different phenomena (at both national and international levels) gave rise to significant changes in Italy. The post-war political system (characterised by a blocked political system excluding the Communist party from the government) collapsed, and a new bipolar party system, based on competition between two coalitions (centre-left and centre-right) arose. Yet in recent times many factors combined have contributed to a decline in trust among citizens towards national politics, political parties and institutions in Italy (Mannheimer and Sani, 2001). These factors include the weakening of ideology following the fall of the Berlin wall, the increasing importance of international politics in national arenas (due to increased financial and economic globalisation, as well as European integration), and, finally, in relation to the Italian system, political corruption scandals (Mantovani and Burnett, 1998)
Un carnet de recherche pour Calenda
No full textCette année, Calenda, le calendrier d’événements scientifiques d’OpenEdition, fête son vingtième anniversaire. 20 ans d’appels à contribution, de programmes de colloques ou de journées d’études, et de séminaires : le Carnet de Calenda, désormais en ligne sur la plateforme Hypothèses, permettra d’alimenter la réflexion sur la place de Calenda dans le cycle de la recherche mais aussi sur son histoire, ses enjeux et ses évolutions. Partager des questionnements et des travaux réflexifs et d’..
Drop dissipators: a comparison between CFD simulations and experimental observations
No full textLaboratory measurements of the free surface profile were carried out over a physical model of a classical channel drop inserted in a sewer, equipped with a depressed stilling basin. This devise is still in use in several combined sewer systems and may have unfavourable consequences on the water quality of the receiving bodies. The present paper is part of a study to economically modify the existing structure in order to prevent dry weather sedimentation and heavily polluted first flush flow. The experimental free surface profiles observed in different conditions were compared with numerical simulations obtained using the computational flow dynamic software FLOW 3-D with the imposed conditions at the downstream boundary. The standard k- turbulence model is used in conjunction with the volume of fluid (VOF) free surface model. The computer simulations faithfully reproduce the water level in the upstream pipe branch and in the dissipation manhole. However, some discrepancies were observed between the measured and simulated jet, and in the position of the hydraulic jump
La formazione dei neo-assunti. I risultati di una ricerca in provincia di Salerno
No full textIl contributo propone l’approfondimento dei risultati di una
ricerca svolta in provincia di Salerno sul modello di formazione
e prova dei docenti neoassunti previsto dal D.M. 850 del 2015.
Nella ricerca, si cercato di comprendere come è stato accolto il
modello formativo previsto dal legislatore, rilevando la percezione
e le opinioni dei docenti in relazione alle diverse dimensioni che
lo compongono e analizzando la percezione del cambiamento in
relazione allo sviluppo dell’identit professionale. I risultati della
ricerca hanno evidenziato una insoddisfazione per le attivit di
laboratorio. Questo contributo si pone l’obiettivo di fornire alcune
precisazioni interpretative sui risultati, con un focus su alcune delle
dimensioni precedentemente indagate: cambiamento e percezione
di s ; atteggiamento verso i laboratori formativi. Inoltre, si approfondisce
il tema della soddisfazione complessiva, con l’obiettivo di
individuare l’aspetto o gli aspetti che incidono maggiormente sulla
percezione della soddisfazione.L’article propose une tude approfondie des r sultats d’une
recherche men e dans la province de Salerne sur la maquette de formation
initiale et des test des enseignants nouvellement embauch s
pr vu par l’arr t minist riel 850 de 2015. Dans la recherche, une tentative
a t faite pour comprendre comment la maquette de formation
envisag e par le l gislateur a t accept e, en notant la perception et
les opinions des enseignants par rapport aux diff rentes dimensions
qui le composent et en analysant la perception du changement par
rapport au d veloppement de l’identit professionnelle. Les r sultats
de la recherche ont r v l une d ception l’ gard des activit s du
laboratoire. Cet article vise apporter des claircissements interpr tatifs
sur les r sultats, en mettant l’accent sur certaines des dimensions
pr c demment tudi es: le changement et la perception de soi;
attitude envers les laboratoires de formation. De plus, le th me de
la satisfaction globale est explor , dans le but d’identifier le ou les
aspects qui ont le plus d’impact sur la perception de la satisfaction
MeSH term explosion and author rank improve expert recommendations
No full textInformation overload is an often-cited phenomenon that reduces the productivity, efficiency and efficacy of scientists. One challenge for scientists is to find appropriate collaborators in their research. The literature describes various solutions to the problem of expertise location, but most current approaches do not appear to be very suitable for expert recommendations in biomedical research. In this study, we present the development and initial evaluation of a vector space model-based algorithm to calculate researcher similarity using four inputs: 1) MeSH terms of publications; 2) MeSH terms and author rank; 3) exploded MeSH terms; and 4) exploded MeSH terms and author rank. We developed and evaluated the algorithm using a data set of 17,525 authors and their 22,542 papers. On average, our algorithms correctly predicted 2.5 of the top 5/10 coauthors of individual scientists. Exploded MeSH and author rank outperformed all other algorithms in accuracy, followed closely by MeSH and author rank. Our results show that the accuracy of MeSH term-based matching can be enhanced with other metadata such as author rank
Distribution of the extreme peak floods of the Tiber River from the XV century
No full textThe peak stages of the extreme floods inundating the town of Rome are known since the XV century. This record covering more
than 500 years can be considered as a censored sample of the population of the peak flood stages at the site. To evaluate the peak
flow of the observed events the following information is available: (a) a long record of daily stage measurements up to the XVIII
century; (b) several records of daily rainfall depth measurement at two rain gauges in the Tiber catchment, extending at least up to
the middle of the XIX century; (c) detailed surveys executed immediately after the great flood of 1870, including the elevation plan of
the town, a survey of the riverbed and the flood hydrograph of the 1870 flood; (d) a less detailed survey of the riverbed executed in
1744; (e) a rich iconography, showing the conditions of the Tiber banks from the XVI century onward; (f) contemporary descriptions
of several extreme floodings; and (g) a rich series of flow measurements and bed surveys after the great flood of 1870 to present
days. A two-dimensional hydrodynamic model was used to simulate the flooding of the old town in order to determine the flow–
discharge relationship, thus allowing reconstruction of a record of the past extreme floods. A statistical analysis was developed for
evaluating the risk hazard, using the censored sample of all the extreme floods from the XV century and the sample of all the maximum
annual floods from the end of the XVIII century
Going Beyond Counting First Authors in Author Co-citation Analysis
No full textThe 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
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