1,720,967 research outputs found
Cyber Security: hacker, terroristi, spie e le nuove minacce del web
No full textQuesto libro si propone di offrire una introduzione alle principali dinamiche che caratterizzano la sicurezza del cyber spazio e alle attività in atto a livello nazionale, europeo e globale per renderlo più sicuro. A tal fine, il libro è suddiviso in cinque capitoli. Il primo si occupa di delineare la storia evolutiva della dimensione cibernetica, mentre nel secondo è fornita un’ampia panoramica delle principali minacce che ne minano la fruibilità. Il terzo capitolo affronta il tema delle misure intraprese dal settore privato e si evidenzia come uno spazio cibernetico più sicuro garantisca un mercato nazionale, regionale e globale più competitivo e produttivo. Nel quarto capitolo è trattata la questione della governance internazionale, ossia delle misure adottate dalle organizzazioni internazionali e regionali quali UE, NATO, OSCE e ONU al fine di migliorare la sicurezza e gestire le relazioni nello spazio cibernetico globale. L ’ultimo capitolo tratta invece della governance italiana e dell’architettura che il governo ha costruito al fine di gestire in maniera sicura ed efficiente la rivoluzione digitale
Strategies of disarmament: civil society and the nuclear non-proliferation treaty
Full text linkThis thesis explores the ideological bases of the global governance of nuclear
weapons by analysing the role of civil society, an actor generally left aside by
nuclear scholarship. Here the question of nuclear order is tackled with an
unconventional approach that combines critical works in nuclear studies,
critical constructivist works on security, and Antonio Gramsci’s theory of
civil society. Such approach brings civil society to the forefront of analytical
attention in order to show the cultural domination exercised by the bomb by
inquiring into the common sense nature of nuclear discourse. This rests on
the assumption that uncritically accepted ideas about what nuclear weapons
do have been instrumental in generating the current nuclear order that,
although under mounting challenges, remains based on a hierarchy between
states protected by the bomb and all the rest.
To understand how civil society challenges and reproduces that order, this
thesis analyses the calls for nuclear disarmament advanced by organised
collective actors and inquires, in a Gramscian way, into the common sense
ingrained in those calls as well as their ability to constitute a united front. As
a result, the thesis problematises the notion of disarmament, marking the
importance of a struggle on its very concept between reductionist and
abolitionist frames. It indicates that while the latter are involved in a radical
opposition, the former are culturally dominated by the system of deterrence,
thus coming to represent two distinct historic blocs: a counter-hegemonic
opposition, on one hand, and an unwitting part of the hegemonic apparatus,
on the other. This thesis concludes that 1) civil society is far from having
created a unity of intent; and 2) the bases for the reliance on nuclear weapons
are deeply entrenched, because of the pervasiveness, even inside civil
society, of a common sense view of the nuclear threat.This thesis explores the ideological bases of the global governance of nuclear
weapons by analysing the role of civil society, an actor generally left aside by
nuclear scholarship. Here the question of nuclear order is tackled with an
unconventional approach that combines critical works in nuclear studies,
critical constructivist works on security, and Antonio Gramsci’s theory of
civil society. Such approach brings civil society to the forefront of analytical
attention in order to show the cultural domination exercised by the bomb by
inquiring into the common sense nature of nuclear discourse. This rests on
the assumption that uncritically accepted ideas about what nuclear weapons
do have been instrumental in generating the current nuclear order that,
although under mounting challenges, remains based on a hierarchy between
states protected by the bomb and all the rest.
To understand how civil society challenges and reproduces that order, this
thesis analyses the calls for nuclear disarmament advanced by organised
collective actors and inquires, in a Gramscian way, into the common sense
ingrained in those calls as well as their ability to constitute a united front. As
a result, the thesis problematises the notion of disarmament, marking the
importance of a struggle on its very concept between reductionist and
abolitionist frames. It indicates that while the latter are involved in a radical
opposition, the former are culturally dominated by the system of deterrence,
thus coming to represent two distinct historic blocs: a counter-hegemonic
opposition, on one hand, and an unwitting part of the hegemonic apparatus,
on the other. This thesis concludes that 1) civil society is far from having
created a unity of intent; and 2) the bases for the reliance on nuclear weapons
are deeply entrenched, because of the pervasiveness, even inside civil
society, of a common sense view of the nuclear threat.LUISS PhD Thesi
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
Analysis of Electron Dynamics in Non-Ideal Penning Traps
No full textIn Penning traps that are used for particular applications, such as in ion pump
technology, Larmor, bouncing and diocotron frequencies can be of the same order of
magnitude. The paper deals with the dynamics of electrons confined in such devices
starting from the study of the properties of the trajectories. In cases of interest,
in which electron-neutral collision frequency is much smaller with respect to the
characteristic frequencies of the motion, suitable time averages of the trajectories are
introduced in order to simplify the analysis of the problem. In the work, time averages
have been calculated in a simple way by using an approximate r−z decoupling of the
effective potential. Results obtained with the method are presented and discussed in
both linear and nonlinear regimesPenning trap, ergodic methods, electron dynamics, time-averag
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
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe 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
Dispelling the Myths Behind First-author Citation Counts
Full text linkWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
- …
