6,139 research outputs found
Mode Coupling Approach for spin-facilitated kinetic Ising models
The d-dimensional n-spin facilitated kinetic Ising model is studied
analytically starting from usual master equations and their transformation into
a Fock-space representation. The evolution of relevant operators is rewritten
in terms of a projection formalism. The obtained frequency matrices and memory
terms are analyzed. Especially, the influences of the memory terms is
approached by using standard techniques of the usual mode coupling approach.
The temperature dependence of the relaxation times related to the n-spin
facilitated kinetic Ising model shows a weak non-Arrhenius behavior.
Furthermore, a characteristic stretched decay of the correlation function is
obtained.Comment: Written in REVTex, 18 pages, 7 figures in Postscrip
Characterizing Phishing Threats with Natural Language Processing
Spear phishing is a widespread concern in the modern network security
landscape, but there are few metrics that measure the extent to which
reconnaissance is performed on phishing targets. Spear phishing emails closely
match the expectations of the recipient, based on details of their experiences
and interests, making them a popular propagation vector for harmful malware. In
this work we use Natural Language Processing techniques to investigate a
specific real-world phishing campaign and quantify attributes that indicate a
targeted spear phishing attack. Our phishing campaign data sample comprises 596
emails - all containing a web bug and a Curriculum Vitae (CV) PDF attachment -
sent to our institution by a foreign IP space. The campaign was found to
exclusively target specific demographics within our institution. Performing a
semantic similarity analysis between the senders' CV attachments and the
recipients' LinkedIn profiles, we conclude with high statistical certainty (p
) that the attachments contain targeted rather than randomly
selected material. Latent Semantic Analysis further demonstrates that
individuals who were a primary focus of the campaign received CVs that are
highly topically clustered. These findings differentiate this campaign from one
that leverages random spam.Comment: This paper has been accepted for publication by the IEEE Conference
on Communications and Network Security in September 2015 at Florence, Italy.
Copyright may be transferred without notice, after which this version may no
longer be accessibl
Antonovsky Bütünlük Duygusu Ölçeği ve Hemşirelik Araştırmalarında Kullanımının Sistematik İncelemesi: Ruh Sağlığı ve Psikiyatri Hemşireliği Açısından Anlamlar
Text in English and TurkishObjectives: Antonovsky’s salugenetic model focuses on factors that
promote health and well-being. The objectives of this paper were to
review the existing research literature related to Antonovsky’s Sense
of Coherence Scale (SOC) and establish implications for psychiatric
and mental health nurses.
Methods: Electronic databases were searched with selected studies
compared for sample, sample size, study designs and basic results.
Cross-sectional studies were reviewed for correlations between personality
traits, stress, burnout, disease-scales, job satisfaction and
the SOC scale, with Intervention studies used to establish the impact
of training on the SOC.
Results: The review discovered serious methodological difficulties,
including interpretations of Antonovsky’s philosophical values and
the apparent use of the SOC scales as a measure of disease absence.
Conclusion: The review was able to draw important conclusions for
psychiatric and mental health nurses (PMHNs) related to stress, burnout,
dealing with psychiatric emergencies and the selection of new
recruits to the profession.peer-reviewe
Spin facilitated Ising model with long range interaction
We study the dynamics of a spin facilitated Ising model with long range
kinetic constraints. To formulate those restrictions within an analytical
approach we introduce the size of a kinetic active environment of a given spin.
Based on a Master equation in second quantized form, the spin-autocorrelation
function is calculated. It exhibits a pronounced slow dynamics, manifested by a
logarithmic decay law of the spin-autocorrelation function. In case of an
infinite kinetic interaction the mean field solution yields an asymptotic exact
expression for the autocorrelation function which is in excellent agreement
with Monte Carlo Simulations for finite interaction lengths. With increasing
size of the active zone the cooperative processes, characterizing the
facilitated model with short range kinetic interaction, become irrelevant. We
demonstrate that the long range kinetic interaction dominates the actual spin
configurations of the whole system and the mean field solution is the exact
one.Comment: 18 pages, 5 figure
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