197,067 research outputs found
Cultural differences and social amplification of risk of a tourism destination: foreign media coverage after 2016/2017 earthquakes in Central Italy
No full textLe destinazioni turistiche sono molto esposte ai disastri che possono influenzare le richieste e le tendenze del turismo. Infatti, le attività terroristiche, l'instabilità politica e i disastri naturali sono i tre fattori principali, nella società contemporanea, che possono influenzare e sostenere la percezione del rischio e quindi, avere un impatto sul processo decisionale del turista. Questa percezione e l'amplificazione sociale del rischio sono influenzate dalla copertura mediatica durante gli eventi. Lo scopo del presente studio è quello di indagare il ruolo della copertura mediatica nella segnalazione del rischio nel contesto di una "destinazione a rischio", come nel caso della regione Marche, che è stata colpita da diversi eventi sismici nei mesi di agosto e ottobre 2016 e nel gennaio 2017. In particolare, questo studio analizza le differenze culturali dal punto di vista della copertura mediatica dei giornali online nei due paesi durante il periodo dei terremoti utilizzando un approccio esplorativo. Questo studio richiama l'attenzione sulle differenze culturali nella copertura mediatica e nell'amplificazione sociale del rischio Italia come area a rischio e potrebbe sensibilizzare i marketer del turismo e i politici sull'importanza della promozione personalizzata e delle strategie pubblicitarie considerando le differenze culturali.Tourism destinations are very exposed to disasters that can influence tourism demands and trends. As a matter of fact, terrorist activities, political instability and natural disasters are the three main factors, in the contemporary society, which can influence and support the risk perception and thus, have an impact on the tourist decision-making process. This perception and the social amplification of risk are affected by the media coverage during the events. The purpose of the current study is to investigate the role of media coverage in reporting risk in the context of a “risky destination”, as in the case of the Marche region, which has been stricken by several seismic events in August and October 2016 as well as in January 2017. In particular, this study analyses cultural differences from the perspective of online newspapers media coverage in the two countries during the earthquakes period using an explorative approach. This study draws attention to the cultural differences in media coverage and social amplification of risk in Italy as a risky area and could will raise awareness among tourism marketers and policymakers about the importance of customized promotion and advertising strategies considering cultural differences
Preface
No full textThis volume of Communications in Computer and Information Science (CCIS) contains
the post-proceedings of HELMeTO 2022, the fourth International Conference on Higher
Education Learning Methodologies and Technologies Online, which took place during
September 21–23, 2022 in Palermo, Italy.
The conference was organized by the Department of Mathematics and Computer
Science at the University of Palermo and by the Institute of Educational Technology of
the National Research Council of Italy. The 2022 edition of HELMeTO also marked
the return of the event in presence, as the previous two editions had been held entirely
online due to the Covid-19 emergenc
Image noise properties of a phosphor-coated CCD X-ray detector
No full textWe are investigating on the imaging characteristics of a CCD X-ray detector based on the direct deposition of a scintillator onto the CCD surface. The overall performance of the system depends on the relative weight of two types of interaction: the scintillation photons interaction and the direct interaction of the X-rays within the CCD. Two different thicknesses of a Gd2O2S : Eu screen have been chosen as scintillator coating? 100 and 200 mu m, respectively. Image noise has been measured for three different beam qualities and its dependence on the input beam X-ray energy is discussed. (C) 1998 Elsevier Science B.V. All rights reserved
Socio-semantic Networks of Research Publications in the Learning Analytics Community
No full textFazeli, S., Drachsler, H., & Sloep, P. B. (2013). Socio-semantic Networks of Research Publications in the Learning Analytics Community. In M. d'Aquin, S. Dietze, H. Drachsler, E. Herder, & D. Taibi (Eds.), Linked data challenge, Learning Analytic and Knowledge (LAK13) (pp. 6-10). Vol. 974, Leuven, Belgium.In this paper, we present network visualizations and an analysis of publications data from the LAK (Learning Analytics and Knowledge) in 2011 and 2012, and the special edition on Learning and Knowledge Analytics in Journal of Educational Technology and Society (JETS) in 2012.NELLL, FP7 EU Open Discovery Space (ODS
Spatial resolution measurements in quasimonochromatic x rays with mosaic crystals for mammography application
No full textA novel x-ray source for mammography application is being investigated. Quasimonochromatic x rays have been produced via Bragg diffraction with a W-anode x-ray tube and a graphite mosaic crystal array. The system provides 18 keV x rays with an energy resolution DeltaE/E approximate to0.12. A thorough analysis of the spatial resolution of the system has been performed in order to understand and quantify the effect of the introduction of an active optical element such as a mosaic crystal in the x-ray path. The focal spot of the source and its emission properties have been studied by using the slit camera method. Experiments have shown that the introduction of a mosaic crystal in the optical path modifies the resolution properties of the Bragg diffraction-based radiography system. Along the direction perpendicular to the diffraction plane the resolution properties of the imaging system mainly depend on the x-ray tube focal spot size and position. Along the diffraction plane the focal spot size depends on mosaic characteristics and on the geometrical. setup. Hence, it could be modified by setting the appropriate experimental conditions. (C) 2001 American Association of Physicists in Medicine
On-Line Retrieval of Health Information Based on Language Complexity, Information Customization and Information Quality
No full textAbstract. A patient, nowadays, acquires on-line health information mainly by
means of a search engine. Generic search engines have been shown to be limited
and unsatisfactory, at times, because of their generic searches that overload users
with the amount of results. Moreover, they are not able to provide customized
information to different types of users. At the same time, specific search engines
mostly work on medical literature and provide extracts from medical journals that
are mainly useful for medical researchers and experts. As a consequence, the found
health information may or may not help a user (mainly a non-expert one) for a
full comprehension of what he/she is looking for (e.g., a condition, a therapy or a
drug). This may negatively affect his/her empowerment process and the interaction with healthcare professionals such as doctors. This work presents a custom
search engine, FACILE, that allows to overcome the limitations discussed above
by facilitating finding and comprehension of on-line information and thus positively affecting the empowerment process and communication/interaction with
healthcare professionals. A user, both a medical expert or non-expert, can specify
his/her information requirements in terms of language level, specific information
searched, and information quality. FACILE will provide the links to the web pages
that comply with such requirements. In particular, FACILE will provide links to
web pages with different language levels (simple or complex) and, for each link,
the response page will show the requested specific information (condition, therapy,
drug, etc.) and a graphical indication (0–5 stars) of the information quality
NARROW ENERGY-BAND X-RAYS VIA MOSAIC CRYSTAL FOR MAMMOGRAPHY APPLICATION
No full textMonochromatic X-ray beams are desirable in various fields of diagnostic radiology. We are investigating an imaging system based on a narrow energy band X-ray source for mammography application. The narrow energy band is obtained by making use of a mosaic crystal that reflects X-rays from a conventional X-ray tube via Bragg diffraction. In this paper the characteristics of the system in terms of energy resolution and fluence rate are reported. Small field (1.1 x 3.0 cm(2)) radiographs of Plexiglas phantoms with a thickness up to 3.6 cm have been obtained with 18, 20 and 22 keV quasi-monochromatic beams. The field size is limited by the crystal size along one dimension and by the desired energy spread along the other one. A digital imaging system has been used to correct for non-uniformity of the X-ray beam
Facilitating access to health web pages with different language complexity levels
No full textThe number of people looking for health information on the Internet is constantly growing. When searching for health information, different types of users, such as patients, clinicians or medical researchers, have different needs and should easily find the information they are looking for based on their specific requirements. However, generic search engines do not make any distinction among the users and, often, overload them with the provided amount of information. On the other hand, specific search engines mostly work on medical literature and specialized web sites are often not free and contain focused information built by hand. This paper presents a method to facilitate the search of health information on the web so that users can easily and quickly find information based on their specific requirements. In particular, it allows different types of users to find health web pages with required language complexity levels. To this end, we first use the structured data contained in the web to classify health web pages based on different audience types such as, patients, clinicians and medical researchers. Next, we evaluate the language complexity levels of the different web pages. Finally, we propose a mapping between the language complexity levels and the different audience types that allows us to provide different types of users, e.g., experts and non-experts with tailored web pages in terms of language complexity
Evaluation of a digital X-ray detector based on a phosphor-coated CCD for mammography
No full textThe imaging performance of a phosphor-coated CCD system for mammography application is evaluated. The coated CCD is obtained by direct deposition of a Gd2O2S:Eu powder onto a detector surface. Modulation transfer function, noise power spectrum, and detective quantum efficiency are measured. Their dependence on the input beam X-ray energy is discussed. Images of a test phantom for mammography are compared with those obtained with a screen-film combination
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