Search results for "network analysis"
showing 10 items of 230 documents
Attracting sets in network regulatory theory
2016
Modern telecommunication networks are very complex and they should be able to deal with rapid and unpredictable changes in traffic flows. Virtual Network Topology is used to carry IP traffic over Wavelength-division multiplexing optical network. To use network resources in the most optimal way, there is a need for an algorithm, which will dynamically re-share resources among all devices in the particular network segment, based on links utilization between routers. Attractor selection mechanism could be used to dynamically control such Virtual Network Topology. The advantage of this algorithm is that it can adopt to very rapid, unknown and unpredictable changes in traffic flows. This mechani…
Interaction Theory and the Social Network
1967
Interaction theorists have delineated the close association in friendship relations between value consensus, affectional closeness, and interaction. Categorical investigations of the social network have focused upon frequency of interaction with friends and kin. In the present paper a componential theory of attraction in the social network is developed in order to link previous theoretical discussions with the empirical social network categories. Two attractional variables, one based upon consensus and the other upon positive concern, are perceived as interpreting friendship and kinship involvements. Consensus tends to be modal in friendship and positive concern in kinship, though there are…
Literatura científica de autores españoles sobre análisis de citas y factor de impacto en Biomedicina (1981-2005)
2008
This paper analyses the development of Spanish research literature in the field of citation analysis and impact factor (IF) in biomedicine over the period 1981-2005. Bibliometric methods and social network analysis were used to examine papers indexed in the Science Citation Index-Expanded (SCI-Expanded), Social Sciences Citation Index (SSCI), MEDLINE, Índice Médico Español (IME) and Índice de Ciencias Sociales y Humanidades (ISOC) databases. 184 papers were identified, 79.89% of which were original research articles. Only four of these papers had been published before the 1990s. The mid 1990s saw a remarkable increase in the number of papers published (8-14 papers/year) with the highest pro…
Interactions of pharmaceutical companies with world countries, cancers and rare diseases from Wikipedia network analysis
2019
AbstractUsing the English Wikipedia network of more than 5 million articles we analyze interactions and interlinks between the 34 largest pharmaceutical companies, 195 world countries, 47 rare renal diseases and 37 types of cancer. The recently developed algorithm using a reduced Google matrix (REGOMAX) allows us to take account both of direct Markov transitions between these articles and also of indirect transitions generated by the pathways between them via the global Wikipedia network. This approach therefore provides a compact description of interactions between these articles that allows us to determine the friendship networks between them, as well as the PageRank sensitivity of countr…
User Innovation Networks and Research Challenges
2009
User Innovation Networks (UIN) has been considered the open innovation model for this century as it functions entirely independently of manufacturers. This paper discusses two UIN cases, Daz3D, as well as Linux Dell and IBM cooperation as regards research challenges about the community of practice and interface used. It concludes that current technology only now started touching global and extreme collaboration for creativity and innovation.
Icone gay: tra processi di normalizzazione e di resistenza. Ricostruire la semantica degli hashtag
2018
The mediatization of emotions emerges as an affordance of social media, the study of which involves paying attention to digital practices and the formation of the sense of public affection, of connected audiences expressing their participation through expressions of sentiment. This happens both for the great events and for the daily demonstrations of support or of its negation. Here we choose to analyze the tweets in which the fans express their opinions on the participation in the reality shows of their “icons”: Vladimir Luxuria and Cristiano Malgioglio. To reconstruct the hashtag semantics we use: the NodeXL software for network analysis and Iramuteq for the extraction of lexical worlds.
The mobility network of European tourists: a longitudinal study and a comparison with geo-located Twitter data
2018
Purpose This paper aims to provide a network study of the structural and dynamical characteristics of tourism flows in Europe from 1995 to 2012. Design/methodology/approach Travels in Europe were studied by following the network science research paradigm and by focusing on the whole network of intra-European tourism destinations. Network analysis was used to map and reveal the pattern of connections between states as shaped by bilateral tourism flows. Data were provided by the United Nations World Tourism Organization, and the data were integrated with tourism data available from national statistical offices of the individual countries, when necessary. Findings For 2012, results obtained f…
Robust control of continuous-time systems with state-dependent uncertainties and its application to electronic circuits
2014
In this paper, the problems of robust stability and stabilization are investigated for a class of continuous-time uncertain systems. The uncertainties in the model are state-dependent and belong to a polytopic convex set, as can be found in many electronic circuits and some other applications. The global asymptotic stability conditions for such systems are first established by the classic common quadratic Lyapunov function approach. To reduce conservativeness, a particular class of nonquadratic parameter-dependent Lyapunov functions is introduced, by which improved robust stability conditions for the underlying systems are also derived. Based on the stability criteria, a static output feedb…
A network perspective on international banking integration
2011
Abstract The aim of this article is to develop new international banking integration indicators together with their components: openness and regularity (balance) of the bilateral bank flows. We define the Standard of Perfect Banking Integration (SPBI), which characterizes the scenario attainable when bank flows are not geographically biased, and cross-border asset trade is not affected by home bias. We assess the gap between a hypothetical scenario of geographic neutrality and the current level of banking integration, along with both of its components. The empirical application to the banking systems of 23 countries over the 2003–2009 period enables us to conclude that the level of banking …
Engagement as a Driver of Growth of Online Health Forums: Observational Study
2017
Background: The emerging research on nurturing the growth of online communities posits that it is in part attributed to network effects, wherein every increase in the volume of user-generated content increases the value of the community in the eyes of its potential new members. The recently introduced metric engagement capacity offers a means of quantitatively assessing the ability of online platform users to engage each other into generating content; meanwhile, the quantity engagement value is useful for quantifying communication-based platform use. If the claim that higher engagement leads to accelerated growth holds true for online health forums (OHFs), then engagement tracking should be…