1,721,197 research outputs found
Empirical fragility curves for masonry buildings struck by the 2016 Central Italy earthquake
Full text linkThe prevention of seismic risk at urban scale can be pursued through the estimate of the probability to reach or exceed a certain
damage grade given the seismic input. In this framework, seismic fragility curves are nowadays of large interest as they express
this probability in a synthetic way, also extended to large-scale applications. Real damage data are crucial in making more reliable
predictions of damage occurrence, although they can be influenced by a proper definition of the structural types and the
completeness of observations. The paper shows the empirical fragility curves obtained for a sample of 2263 masonry buildings
located within 19 historical centers struck by the 2016 Central Italy earthquake. The damage grade was evaluated according to the
European Macroseismic Scale (EMS-98), also considering undamaged buildings, at the end of the sequence that spanned between
August and October. The buildings largely underwent several repairs and strengthening actions with reinforced concrete elements
starting from the 1980s. The systematization of the structural features led to a taxonomy for strengthened and original buildings,
which, based on the observed damage patterns, was matched to the EMS-98 vulnerability classification. The sample ranges from
class A (worst behavior) to D (best behavior). Class A was typically assigned to original buildings (without interventions) or illadvisedly tampered ones, i.e., those in which interventions had an unfavorable contribution to their seismic behavior. Class D
described buildings with properly designed strengthening interventions, classes B and C intermediate situations. Fragility curves
were obtained per each vulnerability class, as a function of the highest peak ground acceleration (PGA) observed in the sequence
from ShakeMaps. The results were then compared to other empirical fragility model
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
Another week at the office (awato) – an interactive serious game for threat modeling human factors
No full textAnother Week at the Office (AWATO) is serious game aimed to educate users about threat modeling to help them and/or security analysts identify human factor related threats. AWATO offers an interactive experience where players assume the role of a security analyst where they must observe characters within an office, monitor their emails and phone calls, and identify concerning behavior (e.g. writing passwords on post-it notes)
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
An analysis of players’ personality type and preferences for game elements and mechanics
No full textThe personality type of an individual has the potential for influencing the design of gaming experiences. To date, no game or psychology scholars have investigated if a player's personality type aligns with their preferences for game elements or mechanics (GEMs). To this end, an investigation sought to find if a player's personality type (Australian Personality Inventory) can predict a player's preference for GEMs. To explore this, the data from three surveys (n = 279, n = 231, n = 162) assessing a player's API type and preference for GEMs were analyzed. The results confirm that a player's personality type cannot be used to predict a player's preference for GEMs
Spectral parameters for scattering amplitudes in N=4 super Yang-Mills theory
Full text linkPlanar N= 4 Super Yang-Mills theory appears to be a quantum integrable four-dimensional conformal theory. This has been used to find equations believed to describe its exact spectrum of anomalous dimensions. Integrability seemingly also extends to the planar space-time scattering amplitudes of the N= 4 model, which show strong signs of Yangian invariance. However, in contradistinction to the spectral problem, this has not yet led to equations determining the exact amplitudes. We propose that the missing element is the spectral parameter, ubiquitous in integrable models. We show that it may indeed be included into recent on-shell approaches to scattering amplitude integrands, providing a natural deformation of the latter. Under some constraints, Yangian symmetry is preserved. Finally we speculate that the spectral parameter might also be the regulator of choice for controlling the infrared divergences appearing when integrating the integrands in exactly four dimensions. © 2014 The Author(s)
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
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