1,720,985 research outputs found
Social media and audio visual learning in the study of human anatomy. Study of a group of students on Facebook and YouTube
Get PDFThe development of social network sites (SNS) has been one of the most influential phenomena of digital technology in recent years. According to a survey by the Pew Research Center on the use of SNS in the United States (Smith, 2013), two-thirds of adults use tools such as Facebook, Twitter, Myspac and Linkedin and 60% of mobile applications used by smartphone owners are linked to the social network. The growing interest of Internet users for SNS is also confirmed by one of the latest Nielsen studies (2011). According to this study, Internet users in Europe spend more and more time on social networks and blogs: for example, Italian users spend 31% of their total time on the Internet by visiting these categories of services. Among the various SNS, Facebook is now the most popular, with over 900 million users, of which over 500 million access via mobile products (Facebook, 2012). " Social Media" refers to a wide range of applications that allow users to create, share, comment and discuss a multitude of digital content. Social media is considered "dynamic", "interactive", "democratic", "people-centred", "volatile", "social" and "adaptive" (Manca & Ranieri, 2016b). Another aspect of SM that is often overlooked is its ability to transform teaching/learning into a more social, open and collaborative activity. Researchers have used many theories/models to determine the feasibility of using social media for educational purposes. With the exponential growth of social media and the ease of information flow, new horizons are opening up, as the technological progress that allows the teacher to create a student/group on a social media platform and motivating learners to ask questions at any time to clarify their doubts. In addition, teachers can regularly provide parents has been with immediate feedback about the students’ progress. The use of social media, especially Facebook and Youtube, has boomed in the field of education. Thanks to Youtube videos, students can learn through sight and hearing by fixing and memorizing the key concepts of what has been acquired. Multisensory learning, as the name suggests, is the process of learning a new topic through the use of two or more senses. Sensory integration occurs in the central nervous system where complex interactions such as coordination, attention, emotions and memory are processed to give a meaningful response. This can include the visual and auditory combination. By activating brain regions associated with hearing and vision, they indicate a direct relationship between knowledge and sensory mechanisms in the brain. In this study I have examined with particular attention the relationship between technologies, digital media and the learning process. In the first part of the work the theoretical frame of reference is outlined for reconstructing the transition from a monosensory society to a multisensory society increasingly dominated by digital artifacts. The second part focuses on the results obtained by answering the question: "How do social media affect the visual and auditory learning of anatomy?" A multisensory integration model has been developed and there is a clear evidence that this model, based on social media Facebook and Youtube, has improved students’ performance in anatomy. Perceptual learning is a good testing ground for the multisensory as it is typically very slow, it requires many days of training and has been shown to be mediated by early visual areas of the brain traditionally considered to be highly unimodal. An auditory-visual study has been chosen because visual motion stimuli are typically accompanied by sounds and because there is anatomical evidence in animals and human neurophysiology studies indicating that hearing-sight interactions affect visual processing in the primary visual cortex as well. This study aims at the following: - investigating the role of the visual element in the study of anatomy thanks to the use of Youtube; - exploring how Youtube and Facebook technology have played a role in enhancing students' learning skills - shedding new light on the importance of Youtube and Facebook as fundamental teaching tools and as a resource for both teachers and students. This empirical research shows the positive results achieved using SNS and multisensory models in both higher and university education.
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L'utilizzo della microscopia elettronica a scansione a pressione variabile nella valutazione delle strutture anatomiche del dente e dei materiali utilizzati in odontoiatria
Get PDFLa microscopia elettronica a scansione (SEM) è una metodica di grande importanza e largamente utilizzata in tutte le comunità scientifiche e tecnologiche. Tuttavia, nel tempo si è resa evidente la necessità di sviluppi e innovazioni concernenti il SEM e il suo utilizzo nell’ambito della ricerca scientifica, specialmente per ciò che riguarda le osservazioni dei campioni biologici. Da qui l'avvento dei SEM che utilizzano gas per la formazione di immagini, fornendo contemporaneamente stabilizzazione della carica elettronica per i campioni non conduttivi. Una delle maggiori difficoltà nel campo della microscopia elettronica a scansione a pressione variabile (VPSEM) è che non ci sono semplici regole che definiscono quali parametri utilizzare. Ogni campione, a seconda delle proprie caratteristiche superficiali e proprietà, avrà dei parametri operativi adottati "su misura" per il campione preso in analisi. Solo tramite l’analisi e la produzione di una corposa letteratura scientifica si potranno ottenere parametri standard e corretti, ovviamente sempre dipendenti dal campione da osservare. Il VPSEM è diventato uno strumento molto importante per l'imaging di campioni idratati e campioni a bassa conduttività. Il vantaggio principale di questo strumento è dato dalla possibilità di osservare campioni senza le varie fasi di preparazione che si attuano prima delle osservazioni tramite SEM convenzionale, le quali possono portare ad artefatti sulla superficie del campione. Pertanto, nella ricerca odontoiatrica, dove la prevalenza delle osservazioni viene effettuata sui denti, e quindi su un tessuto biologico duro ed idratato, il VPSEM può apportare numerosi vantaggi nelle osservazioni, come vedremo più avanti nei vari campi applicativi. Evitando la fase di preparazione del campione, avremo la possibilità di osservare un modello più vicino al reale stato clinico; inoltre, lo stesso campione sarà osservabile più volte, mantenendosi anche idratato, visto che non dovrà subire fasi irreversibili nella preparazione, quali la disidratazione e la metallizzazione. Non ci sono limitazioni per i campi applicativi del VPSEM; infatti è possibile analizzare sia le diverse strutture anatomiche del dente, che i materiali che vengono utilizzati in odontoiatria oppure gli strumenti metallici, come quelli in NiTi utilizzati prevalentemente per i canali radicolari. In particolare, in questo studio sono stati analizzati : 1) Analisi della stabilità nel tempo dell'adattamento marginale di Endosequence Root Repair Material su campioni biologici; 2) Caratterizzazione in vitro della biocompatibilità e delle proprietà antibiotiche dei cementi endodontici a base di calcio e silicati; 3) Studio preliminare di valutazione e misurazione delle fibre di Sharpey su campioni dentali fossili e risalenti ad epoca romana; 4) Ruolo della superficie progettata in piano nel miglioramento della resistenza alla fatica ciclica degli strumenti rotanti endodontici in NiTi; 5) Differenze nella durata di vita a fatica ciclica tra due diversi strumenti rotanti endodontici NiTi trattati termicamente: WaveOne Gold contro EdgeOne Fire. I risultati ottenuti non danno informazioni contrastanti rispetto a quelli finora raggiunti tramite il SEM convenzionale. In conclusione è necessario apprendere al meglio i vantaggi del VPSEM per sfruttare questo tipo di strumento al massimo. Tuttavia, solo la combine dei due strumenti VPSEM e SEM convenzionale potrà fornire risultati certi e precisi, sfruttando le osservazioni senza preparazione del VPSEM e la miglior risoluzione ad alto ingrandimento del SEM convenzionale
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe 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
Get PDF“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
Get PDFWe 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
Get PDFWe 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
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