Search results for "Network analysis"

La colaboración científica: principales líneas de investigación y retos de futuro

2014

The construction of knowledge is a collaborative process that has seen a dramatic growth over recent decades, since almost all research activities now involve increasing numbers of researchers, institutions, disciplines and countries. The present study provides a bibliographic review of the literature on research collaboration and identifies pioneering work on the topic, the types of studies undertaken and the variables analyzed. Several approaches are discussed: the “classical” approach, based on bibliometric indicators, which has taken on a new dimension with Social Network Analysis; and quantitative and qualitative approaches, which attempt to investigate the motivations and dynamics of …

Recent Advances in Complex Networks Theories with Applications

2014

Multi-scale analysis of the European airspace using network community detection

2014

We show that the European airspace can be represented as a multi-scale traffic network whose nodes are airports, sectors, or navigation points and links are defined and weighted according to the traffic of flights between the nodes. By using a unique database of the air traffic in the European airspace, we investigate the architecture of these networks with a special emphasis on their community structure. We propose that unsupervised network community detection algorithms can be used to monitor the current use of the airspaces and improve it by guiding the design of new ones. Specifically, we compare the performance of three community detection algorithms, also by using a null model which t…

Numerical approach for signal delay in general distributed networks

2003

The authors consider a general network with telegraph equations modelling distributed elements and having, additionally, nonlinear capacitors. A global asymptotic exponential stability of the solution is given. A simple computable upper bound of the delay time is given. Numerical examples illustrate the usefulness of the results. >

Singling out functional similarities in graph databases

2008

TENDENZE REALI E FINANZIARIE DEL BACINO MARMIFERO DI CUSTONACI E I PROCESSI DI COLLABORAZIONE E COMPETIZIONE DELLE IMPRESE LOCALI

2009

L’obiettivo che si intende perseguire è l’analisi del settore marmifero in Sicilia, con particolare riferimento al sistema di Custonaci, una delle realtà maggiormente rappresentative del comparto lapideo in Sicilia e che in letteratura è stato analizzato per verificarne elementi di natura distrettuale. Il comparto marmifero è insieme a quello agroalimentare, uno dei pochi settore orientati alla internazionalizzazione. Nell’ultimo decennio, tuttavia, a causa dell’influenza esercitata dai conflitti medio orientali e dal rafforzamento dell’euro nei confronti del dollaro, il comparto ha attraversato una profonda crisi, aggravata da fattori strutturali quali l’eccessiva frammentazione dell’offer…

Least-squares community extraction in feature-rich networks using similarity data

2021

We explore a doubly-greedy approach to the issue of community detection in feature-rich networks. According to this approach, both the network and feature data are straightforwardly recovered from the underlying unknown non-overlapping communities, supplied with a center in the feature space and intensity weight(s) over the network each. Our least-squares additive criterion allows us to search for communities one-by-one and to find each community by adding entities one by one. A focus of this paper is that the feature-space data part is converted into a similarity matrix format. The similarity/link values can be used in either of two modes: (a) as measured in the same scale so that one may …

El clima social del aula entre los alumnos repetidores con sus compañeros a través de Agent SocialMetric

2015

En este articulo describiremos una plataforma computacional web, denominada Agent SocialMetric que simplifica al docente la obtencion, gestion y muestra del clima del aula dado por el grado y estructura de las relaciones de los alumnos en la clase, a traves de un agente de interfaz conversacional llamado Albert, con el que el docente interactua en lenguaje natural. Agent SocialMetric posibilitara que los docentes conozcan a los alumnos a traves de sus relaciones reticulares, estableciendo la estructura social de la clase. Circunscribiremos la aplicacion a un caso practico en el ambito de Educacion Secundaria y conoceremos el clima social de la clase donde hay alumnos repetidores y determina…

Beyond the Family and the Household: Occupational Family Networks

2009

Although families and kinship have been studied extensively from a historical perspective, less attention has been paid to their significance and role in the formation of local social networks.This study makes use of extensive Finnish records of godparentage to map local networks to analyze the factors (kinship, work relations, neighborhood, friendship) that influenced their formation. It argues that, in the context of a closed industrial community, occupation and kinship were the major cornerstones of these networks. Only after work-related inequality was slowly eliminated in the early twentieth century did kinship begin to gain ground as the main influencing factor.

Network position and innovation capability in the regional innovation network

2019

This paper investigates the positioning of actors characterized by different natures in a regional innovation network and explores how these actors improve their innovation capabilities by assuming prominence or brokering positions. Innovation capability is widely seen to be the driving force in building regional competitive advantage, therefore investigating how the positioning of actors improves their innovation-related activities is relevant in terms of regional competitiveness. This paper builds on a survey conducted on the Sicilian regional area in Italy. A questionnaire was used to collect data concerning the relationships established between actors and the extent to which these relat…