1,720,976 research outputs found
A longitudinal study of anti micro patterns in 113 versions of Tomcat
No full textBackground: Micro patterns represent design decisions in code. They are similar to design patterns and can be detected automatically. These micro structures can be helpful in identifying portions of code which should be improved (anti-micro patterns), or other well-designed parts which need to be preserved. The concepts expressed in these design decisions are defined at class-level; therefore the primary goal is to detect and provide information related to a specific granularity level. Aim: this paper aims to present preliminary results about a longitudinal study performed on anti-micro pattern distributions over 113 versions of Tomcat. Method: we first extracted the micro patterns from the 113 versions of Tomcat, then found the percentage of classes matching each of the six anti-micro pattern considered for this analysis, and studied correlations among the obtained time series after testing for stationarity, randomness and seasonality. Results: results show that the time series are stationary, not random (except for Function Pointer), and that additional studied are needed for studying seasonality. Regarding correlations, only the Pool and Record time series presented a correlation of 0.69, while moderate correlation has been found between Function Pointer and Function Object (0.58) and between Cobol Like and Pool (0.44)
Afghan women and children’s health: Three main challenges under Taliban and COVID-19
No full textIn August 2021 the Taliban took over Afghanistan, as the country was battling the third wave of COVID-19, with 155 132 confirmed cases and 7128 deaths (September 25, 2021) [1]. Despite significant progress in the health care system over the last 17 years under the Islamic Republic of Afghanistan, largely attributable to the cooperation with international organizations, Afghanistan still has one of the weakest health systems in the world. Notably, the COVID-19 pandemic has exacerbated poverty and inequality, and the Taliban have added massive pressure to already overwhelmed social and health systems, resulting in a humanitarian and health crisis [2]
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
Experimental characterization and mechanical modeling of additively manufactured TPU components of innovative seismic isolators
No full textThis work presents an experimental and mechanical study on the tensile response of 3D-printed thermoplastic polyurethane membranes, to be used as stretchable members of novel seismic isolators. The examined specimens have been 3D-printed by fused deposition modeling at the Rapid Prototyping Laboratory of the University of Salerno. Cyclic tests performed at different strain rates are employed to characterize the mechanical response of such members and the dependence of preconditioning effects on the recovery time and the initial pretension of the specimens. The presented results show a marked hysteretic response, the fast recovery of residual strains with time, and an appreciable increase of the tangent tensile modulus along the loading phase of the stress–strain curve with growing values of the applied strain rate
An Experimental and Mechanical Study of a Two-Layer, Bioinspired Seismic Isolator for Multistory Buildings
No full textThis work illustrates a novel two-layer version of the sliding–stretching isolator recently proposed in the literature to protect buildings and infrastructure from seismic waves. Such a device has a biomimetic character and is formed by rigid members mimicking the role played by human arms and legs when walking or running, and deformable membranes referred to as tendons. It tunes the elongation and contraction of the tendons to recenter the system and to safely avoid resonance of the system with earthquake frequencies. The paper illustrates how is possible to generalize the mechanical model of the one-layer isolator (SSI1) formulated in previous studies to account for the presence of the second layer (SSI2 system). The two-layer device doubles the lateral displacement capacity of the system, while keeping the footprint of the device fixed. Shake-table tests on reduced-scaled SSI2 prototypes are employed to derive the constitutive parameters of the proposed mechanical model and to experimentally validate it. The given results demonstrate that SSI2 systems pave the way to real-life applications of sliding–stretching isolators in multistory buildings
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
Experimental characterization and mechanical modeling of additively manufactured TPU components of innovative seismic isolators
No full textThis work presents an experimental and mechanical study on the tensile response of 3D-printed thermoplastic polyurethane membranes, to be used as stretchable members of novel seismic isolators. The examined specimens have been 3D-printed by fused deposition modeling at the Rapid Prototyping Laboratory of the University of Salerno. Cyclic tests performed at different strain rates are employed to characterize the mechanical response of such members and the dependence of preconditioning effects on the recovery time and the initial pretension of the specimens. The presented results show a marked hysteretic response, the fast recovery of residual strains with time, and an appreciable increase of the tangent tensile modulus along the loading phase of the stress–strain curve with growing values of the applied strain rate
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
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