1,720,957 research outputs found
A novel identification procedure from ambient vibration data for buildings of the cultural heritage
Full text linkAmbient modal identification, also known as Operational Modal Analysis (OMA),
aims to identify the modal properties of a structure based on vibration data collected when
the structure is under its operating conditions, i.e., no initial excitation or known artificial excitation.
This procedure for testing and/or monitoring historic buildings, is particularly attractive
for civil engineers concerned with the safety of complex historic structures. However,
since the external force is not recorded, the identification methods have to be more sophisticated
and based on stochastic mechanics. In this context, this contribution will introduce an
innovative ambient identification method based on applying the Hilbert Transform, to obtain
the analytical representation of the system response in terms of the correlation function. In
particular, it is worth stressing that the analytical signal is a complex representation of a time
domain signal: the real part is the time domain signal itself, while the imaginary part is its
Hilbert transform. A 3DOF numerical example will be presented to show the accuracy of the
proposed procedure, and comparisons with data from other methods assess the reliability of
the approach
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
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
COMBINED USE OF INNOVATIVE PASSIVE CONTROL DEVICES AND CONVENTIONAL BASE ISOLATION STRATEGIES
Full text linkThis manuscript contains the main part of my research performed in the last three
years at the Department of Engineering, University of Palermo, at the Department
of Basic Sciences in Engineering Sciences (Unit of Applied Mechanics), University of
Innsbruck, Austria and at the company FIP Mec, Selvazzano Dentro, Padova.
Within the research framework of Structural Control, this dissertation proposes
novel passive control strategies to mitigate the dynamic response of base isolated
structural systems.
Among the several types of devices proposed in literature, Tuned Mass Dampers
and Tuned Liquid Column Dampers are undoubtedly the most widely employed
vibration control devices for coupling with base isolated structures. However, excessively
large secondary masses of these devices are required to achieve significant
seismic demand reduction.
Therefore, inerter-based devices, such as the Tuned Mass Damper Inerter (TMDI)
and a proposed variant configuration, referred to as New Tuned Mass Damper Inerter
(New TMDI), represent now an interesting alternative for their particular characteristic
of the “mass amplification effect” of the inerter which can lead to enhanced
performance compared to the classical devices.
On this base, in this work, the behavior and main characteristics of these devices
will be investigated and their effect on the response of base isolated systems will be
studied from a theoretical perspective.
An investigation on the optimal choice of the design parameters of these devices
will be presented with the intent of providing reliable and direct closed analytical
forms. Several numerical applications illustrate the efficiency of the proposed approach
and the potential of the TMDI and New TMDI to suppress the vibrations of
isolated structures vis-à-vis the traditional devices
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
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
- …
