322,858 research outputs found
The contribution of online reviews for quality evaluation of cultural tourism offers: The experience of Italian museums
No full textIn the cultural tourism field, there has been an increasing interest in adopting data-driven approaches that are aimed at measuring the service quality dimensions through online reviews. To date, studies measuring quality dimensions in cultural tourism settings through content analysis of online user-generated reviews are mainly based on manual approaches. When the content analysis is automated, these studies do not compare different analytical approaches. Our paper enters this field by comparing two different automated content analysis approaches to evaluate which of the two is more adequate for assessing the quality dimensions through user-generated reviews in an empirical setting of 100 Italian museums. Specifically, we compare a ‘top-down’ content analysis approach that is based on a supervised classification built on policy makers’ guidelines and a ‘bottom-up’ approach that is based on an unsupervised topic model of the online words of reviewers. The resulting museum quality dimensions are compared, showing that the ‘bottom-up’ approach reveals additional quality dimensions compared with those obtained through the ‘top-down’ approach. The misalignment of the results of the ‘top-down’ and ‘bottom-up’ approaches to quality evaluation for museums enhances the critical discussion on the contribution that data analytics can offer to support decision making in cultural tourism
Generation of Realistic Navigation Paths for Web Site Testing Using Recurrent Neural Networks and Generative Adversarial Neural Networks
No full textA robust technique for generating web navigation logs could be fundamental for applications not yet released, since developers could evaluate their applications as if they were used by real clients. This could allow to test and improve the applications faster and with lower costs, especially with respect to the usability and interaction aspects. In this paper we propose the application of deep learning techniques, like recurrent neural networks (RNN) and generative adversarial neural networks (GAN), aimed at generating high-quality weblogs, which can be used for automated testing and improvement of Web sites even before their release
Moderni strumenti gestionali di dati floristici e vegetazionali: un esempio di geodatabase relazionale per la città di Trieste
No full textI recenti sviluppi nel campo dell’informatizzazione e conservazione della biodiversità stanno portando allo sviluppo
di nuovi sistemi informatici, che rendono possibile una efficiente raccolta, modifica, analisi e condivisione di dati e
metadati. In quest’ottica è stato sviluppato un geodatabase che organizza dati di flora e vegetazione dell’area di Trieste, provenienti
da diversi dataset e raccolti nell’ambito di vari progetti del Dipartimento di Scienze della Vita dell’Università di Trieste.
A questi sono stati aggiunti i dati sul verde pubblico e sulle specie arboree ottenuti dal Comune di Trieste. I dataset sono
stati standardizzati per sistema di riferimento e tassonomia, e successivamente integrati in un database PostgreSQL, abbinato
all’estensione spaziale PostGIS. Il geodatabase, interfacciato con un sistema GIS, è risultato un indispensabile strumento per
la visualizzazione dei dati e per la loro analisi spaziale testo
Influence of poly(d,L-Lactide) nanoencpsulation on the photostability of the sunscreen octyl metoxycinnamate
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Diffusive author(s), cohesive author: Analysis of S/N (1994)
No full textThis study indicates the ways in which various aspects of the author(s) are brought forth in Dumb type’s performance art, the S/N production. Previous research has suggested a non-hierarchical organization of Dumb type and the absence of a “privileged author” in Dumb type’s collaborative work, S/N. However, the results that I have investigated from member’s interviews on the creative process of S/N along with my analysis of the recorded images of S/N, indicate a different aspect of the author(s). First, S/N was created through, so to speak, the collective ideas of the members of Dumb type. Further, S/N has at least nine quotations from previous performances, installations, and printed writings, besides the work-in-progress technique. Explicating one of the “author functions” as given by Michel Foucault, each text has plural subjects of the author. However, it has been revealed from members’ interviews that Teiji Furuhashi had a decision-making role in selecting the members’ ideas within the performance. Since then, S/N has had plural subjects of creation; however, Furuhashi is one of the subjects of creation along with the “privileged author.” S/N has plural authors (diffusive authors) yet at the same time, it has a “privileged author,” Teiji Furuhashi (cohesive author)
Going Beyond Counting First Authors in Author Co-citation Analysis
No full textThe 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
Effect of nanoparticle encapsulation on the photostability of the sunscreen agent, 2-ethylhexyl-p-methoxycinnamate
No full textThe aim of this study was to investigate the influence of nanoparticle-based systems on the light-induced
decomposition of the sunscreen agent, trans -2-ethylhexyl-p-methoxycinnamate (trans-EHMC). Ethylcellulose (EC)
and poly-D,L-lactide-co-glycolide (PLGA) were used as biocompatible polymers for the preparation of the particulate
systems. The ‘‘salting out’’ method was used for nanoparticle preparation and several variables were evaluated in order
to optimize product characteristics. The photodegradation of the sunscreen agent in emulsion vehicles was reduced by
encapsulation into the PLGA nanoparticles (the extent of degradation was 35.3% for the sunscreen-loaded
nanoparticles compared to 52.3% for free trans-EHMC) whereas the EC nanoparticle system had no significant
effect. Therefore, PLGA nanoparticles loaded with trans-EHMC improve the photostability of the sunscreen agent
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