1,721,036 research outputs found
ON BALANCING COSTS AND BENEFITS IN APPLYING VR/VE TOOLS IN THE INTELLIGENT TRANSPORTATION SYSTEMS SECTOR
No full textVirtual Reality Technology has just recently started to be implemented to major industries of Intelligent Transportation systems and, therefore, very few studies have been conducted, in order to define the actual impacts of the use of such technology. A study of indicative cost and benefits of the implementation of Virtual Reality tools and applications to major industries is to be presented. Impacts on society and users are also considered.
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
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
ΔΙΑΔΟΣΗ ΑΚΟΥΣΤΙΚΗΣ ΑΚΤΙΝΟΒΟΛΙΑΣ ΣΕ ΑΝΟΜΟΙΟΓΕΝΗ ΥΠΟΘΑΛΑΣΣΙΟ ΜΕΣΟ ΚΑΙ ΑΝΑΓΝΩΡΙΣΗ ΠΗΓΩΝ ΚΥΜΑΤΙΚΗΣ ΕΚΠΟΜΠΗΣ
No full textΗ ΔΙΑΤΡΙΒΗ ΑΥΤΗ ΕΧΕΙ ΩΣ ΘΕΜΑ ΤΗ ΜΕΛΕΤΗ ΤΗΣ ΔΙΑΔΟΣΗΣ ΑΚΟΥΣΤΙΚΗΣ ΑΚΤΙΝΟΒΟΛΙΑΣ, ΠΟΥ ΠΑΡΑΓΕΤΑΙ ΑΠΟ ΠΗΓΕΣ ΕΚΠΟΜΠΗΣ ΗΧΗΤΙΚΩΝ ΚΥΜΑΤΩΝ, ΜΕΣΑ ΣΕ ΑΝΟΜΟΙΟΓΕΝΕΣ ΥΠΟΘΑΛΑΣΣΙΟ ΜΕΣΟ. ΕΠΙΣΗΣ ΑΣΧΟΛΕΙΤΑΙ ΜΕ ΤΗ ΜΕΛΕΤΗ ΤΟΥ ΠΡΟΒΛΗΜΑΤΟΣ ΤΗΣ ΑΝΑΓΝΩΡΙΣΗΣ ΤΕΤΟΙΟΥ ΕΙΔΟΥΣ ΠΗΓΩΝ. ΑΡΧΙΚΑ ΜΕΛΕΤΑΤΑΙ ΤΟ ΠΡΟΒΛΗΜΑ ΤΗΣ ΔΙΑΔΟΣΗΣ ΑΚΟΥΣΤΙΚΩΝ ΚΥΜΑΤΩΝ ΣΕ ΟΡΙΖΟΝΤΙΑ ΣΤΡΩΜΑΤΟΠΟΙΗΜΕΝΑ ΜΕΣΑ, ΣΕ ΜΕΣΑ ΔΗΛΑΔΗ ΠΟΥ Η ΜΕΤΑΒΟΛΗ ΤΩΝ ΑΚΟΥΣΤΙΚΩΝ ΠΑΡΑΜΕΤΡΩΝ ΕΞΑΡΤΑΤΑΙ ΜΟΝΟ ΑΠΟ ΤΟ ΒΑΘΟΣ. Η ΜΑΘΗΜΑΤΙΚΗ ΠΕΡΙΓΡΑΦΗ ΓΙΝΕΤΑΙ ΜΕΣΩ ΤΗΣ ΣΥΝΑΡΤΗΣΗΣ GREEN ΤΟΥ ΠΡΟΒΛΗΜΑΤΟΣ ΚΑΙ ΤΟ ΑΚΟΥΣΤΙΚΟ ΠΕΔΙΟ ΕΚΦΡΑΖΕΤΑΙ ΜΕΣΩ ΕΝΟΣ ΑΘΡΟΙΣΜΑΤΟΣ ΚΥΜΑΤΟΔΗΓΟΥΜΕΝΩΝ ΡΥΘΜΩΝ ΚΑΙ ΤΟΥ ΠΡΩΤΕΥΟΝΤΟΣ ΠΕΔΙΟΥ ΟΠΟΥ ΑΥΤΟ ΥΠΑΡΧΕΙ. ΤΟ ΜΟΝΤΕΛΟ ΑΥΤΟ ΕΠΕΚΤΕΙΝΕΤΑΙ ΣΤΗ ΣΥΝΕΧΕΙΑ ΩΣΤΕ ΝΑ ΚΑΛΥΨΕΙ ΑΝΟΜΟΙΟΓΕΝΗ ΜΕΣΑ, ΟΠΟΥ ΠΑΡΟΥΣΙΑΖΟΝΤΑΙ ΜΕΤΑΒΟΛΕΣ ΚΑΙ ΜΕ ΤΗΝ ΑΠΟΣΤΑΣΗ ΑΠΟ ΤΗΝ ΠΗΓΗ. ΤΟ ΠΡΟΒΛΗΜΑ ΑΥΤΟ ΑΝΤΙΜΕΤΩΠΙΖΕΤΑΙ ΜΕ ΤΗΝ ΠΡΟΣΕΓΓΙΣΗ ΤΗΣ ΜΕΤΑΒΟΛΗΣ ΤΟΥ ΔΕΙΚΤΗ ΔΙΑΘΛΑΣΗΣ ΩΣ ΠΡΟΣ ΤΗΝ ΑΠΟΣΤΑΣΗ ΜΕ ΤΡΙΓΩΝΟΜΕΤΡΙΚΕΣ ΣΥΝΑΡΤΗΣΕΙΣ ΚΑΙ ΤΗΝ ΚΑΤΑΛΛΗΛΗ ΕΦΑΡΜΟΓΗ ΤΟΥ ΘΕΩΡΗΜΑΤΟΣ GREEN. ΠΑΡΑΤΗΡΗΘΗΚΕ ΟΤΙ Η ΕΙΣΑΓΩΓΗ ΤΗΣ ΠΑΡΑΠΑΝΩ ΕΞΑΡΤΗΣΗΣ ΠΡΟΚΑΛΕΙ ΜΕΓΑΛΕΣ ΜΕΤΑΒΟΛΕΣ ΣΤΑ ΚΥΜΑΤΟΔΗΓΟΥΜΕΝΑ ΠΕΔΙΑ, ΕΙΔΙΚΑ ΣΕ ΠΕΡΙΟΧΕΣ ΕΚΤΟΣ ΤΟΥ ΣΤΡΩΜΑΤΟΣ ΤΗΣ ΠΗΓΗΣ. ΤΟ ΠΡΟΒΛΗΜΑ ΤΗΣ ΑΝΑΓΝΩΡΙΣΗΣ ΑΚΟΥΣΤΙΚΩΝ ΠΗΓΩΝ ΑΝΤΙΜΕΤΩΠΙΖΕΤΑΙ ΜΕ ΤΗΝ ΑΝΑΠΤΥΞΗ ΜΙΑΣ ΜΕΘΟΔΟΥ ΠΟΥ ΕΧΕΙ ΤΗ ΒΑΣΗ ΤΗΣ ΣΤΑ ΠΑΡΑΠΑΝΩ ΦΥΣΙΚΑ ΜΟΝΤΕΛΑ ΚΑΙ ΣΕ ΕΝΑ ΑΛΓΟΡΙΘΜΟ ΕΛΑΧΙΣΤΟΠΟΙΗΣΗΣ (DOWNHILL SIMPLEX). ΔΙΑΠΙΣΤΩΘΗΚΕ Η ΕΥΧΡΗΣΤΙΑ ΤΗΣ ΠΡΟΤΕΙΝΟΜΕΝΗΣ ΜΕΘΟΔΟΥ ΚΑΙ Η ΓΡΗΓΟΡΗ ΣΥΓΚΛΙΣΗ ΤΗΣ, ΕΙΔΙΚΑ ΟΤΑΝ ΥΠΑΡΧΕΙ ΚΑΛΗ ΓΝΩΣΗ ΤΩΝ ΠΑΡΑΜΕΤΡΩΝ ΤΟΥ ΜΕΣΟΥ ΚΑΤΑ ΤΗΝ ΕΝΑΡΞΗ ΤΗΣ ΔΙΑΔΙΚΑΣΙΑΣ ΑΝΑΓΝΩΡΙΣΗΣ.THIS THESIS DEALS WITH THE ANALYSIS AND MODELLING OF ACOUSTIC WAVES PROPAGATION GENERATED FROM A SOURCE WITHIN A LATERALLY INHOMOGENEOUS LAYERED SEA MEDIUM. THE ACOUSTIC FIELD IS CALCULATED USING ANALYTICAL TECHNIQUES. AT THE SAME TIME THE PROBLEM OF SOURCE RECOGNITION IS FACED BY PROPOSING A NON - LINEAR OPTIMIZATION TECHNIQUE, BASED ON THE USE OF A DATABASE OF KNOWN ACOUSTIC SOURCES AND THE DETAILED PHYSICAL MODELS DEVELOPED IN THIS THESIS. FIRSTLY A MODEL STRUCTURE WITH A LAYERED MEDIUM IS ASSUMED WHERE THE REFRACTIVE INDEX IS TAKENTO BE DISCRETE VALUED WHILE A THREE DIMENSIONAL VARIATION IS ASSUMED ON THE INTERFACES OF THE LAYERS. A REALISTIC THREE DIMENSIONAL MODEL OF SEA MEDIUM IN TERMS OF PROPAGATION CHARACTERISTICS IS TAKEN THROUGH THIS APPROACH AND THE ACOUSTIC FIELD IS CALCULATED ANALYTICALLY, THROUGH A GREEN'S FUNCTION FORMULATION. STARTING FROM THE COMPUTATION OF THE RESPONSE FUNCTION OF THE STRATIFIED MEDIUM, INTEGRAL EQUATION TECHNIQUES ARE EMPLOYED TO ANALYSE THE CASE OF INHOMOGENEOUS MEDIUM. FIELD CALCULATION IS CARRIED OUT FOR A SINUSOIDAL LATERAL INHOMOGENEOUS SEA MEDIUM. NUMERICAL COMPUTATIONS ARE CARRIED OUT AND THE EFFECTSOF THE INHOMOGENEITIES ARE EXAMINED. THE PROPOSED OPTIMIZATION ALGORITHM FORDEALING WITH THE SOURCE RECOGNITION PROBLEM IS BASED ON THE MINIMIZATION OF THE QUADRATIC ERROR FUNCTION BETWEEN ESTIMATED SOURCE SIGNAL VALUES AND SIGNALVALUES (ABSTRACT TRUNCATED
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
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