1,722,960 research outputs found
Multi-level attacks on community detection
No full textCommunity detection is an important task in social network analysis, with applications
ranging from identifying criminal groups to finding protein-protein structures. However,
recent research has pointed to serious privacy threats associated with community detection algorithms. This has opened a new strand of research called community deception which aims at developing tools for users to protect their community affiliation from the eye of detection algorithms. But state-of-the-art community deception has been constrained with several limitations that hinder its applicability. This thesis makes several important contributions that expands the utility and effectiveness of community deception algorithms.
First, we develop a novel approach to the deception problem by considering node-centric attacks on social networks. This constitutes an important development over traditional community deception algorithms which considered only edge-centric operations. Specifically, we present node-centric operations in undirected networks, using safeness as a deception objective.
Secondly, we introduce node-centric deception in Directed Influence Networks (DIN); a more challenging context where edges have both a direction attribute and an influence attribute. Through extensive experiments, we demonstrate that our proposed deception algorithms, designed specifically to work in DIN, significantly outperforms baseline methods. Despite the prevalence of DIN in real-world, baseline approaches have been generally oblivious to edge direction and influence, giving more weight to this contribution.
Finally, we develop a new comprehensive community deception framework that tackles the deception problem from a more generic perspective. Contrary to existing approaches we present a community deception algorithm that can be used to hide an entire community structure, a single community, and even a single individual in directed networks. To this end, we develop this framework using Normalized Directed Residual Entropy (NDRE) as the deception objective function of choice. With thorough experimental evaluation, this information-theoretic approach to deception shows promising results over state-of-the-art
The management of very low-calorie ketogenic diet in obesity outpatient clinic: A practical guide. Muscogiuri G, Barrea L, Laudisio D, Pugliese G, Salzano C, Savastano S, Colao A.
No full textThe epidemic of obesity is growing steadily across the whole world. Obesity is not only a merely aesthetic disease but is the "mother" of most chronic diseases such as associated with a range of type 2 diabetes, cardiovascular disease, obstructive sleep apnea, and cancer. However, although there is a need to find a strategy to stop this epidemic disease, most of the times the current nutritional strategies are not effective in weight loss and in long term weight maintenance. Very low-calorie ketogenic diets (VLCKD) is increasingly establishing as a successful nutritional pattern to manage obesity; this is due to rapid weight loss that gives rise to a positive psychological cycle which in turn increases the compliance to diet. Another important key point of VLCKD is the ability to preserve fatty free mass which is known to play a role of paramount importance in glucose metabolism. Despite the clinical evidence of VLCKD there are paucity of data regarding to its management. Therefore, we will provide a useful guide to be used by nutrition experts taking care of subjects with obesity. In particular, we will report recommendations on the correct use of this therapeutic approach for weight loss and management of side effects
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe 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
Variations on the Author
Full text link“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
- …
