1,720,955 research outputs found
Facial Emotion Recognition in Patients with Amnesic Mild Cognitive Impairment and Mild-Moderate Alzheimer's Disease
No full textBackground: Although several studies have found evidence of impairment in facial emotion recognition in Alzheimer's disease, current understanding regarding which specific emotions are preserved and disrupted is inconsistent. Moreover, facial emotion recognition has been little explored in subjects with amnesic mild cognitive impairment.
Objective: To investigate processing of human faces identity and emotional expressions in patients with probable mild-moderate Alzheimer disease (AD), amnesic mild cognitive impairment (a-MCI) and healthy control subjects (CS).
Methods: Thirty subjects were included in the study: 10 AD (mean MMSE corrected score=20.94; DS=1.96), 10 a-MCI (mean MMSE corrected score=25.98; DS=0.69), and 10 CS (mean MMSE corrected score=29.85; DS=0.4). The three groups did not differ for age and education.
All patients underwent an extensive neuropsychological test battery. Geriatric Depression Scale was employed to exclude depressed patients. A new battery for assessing face emotion processing was developed. It included 48 faces pictures of 6 models balanced for sex and age (young, adult and old). For each model there were poses corresponding to seven emotions (anger, disgust, fear, happiness, sadness, surprise, boredom) as well as neutral expressions. Subjects had to perform four different tasks: 1) deciding the emotion label that best described the facial expression shown; 2) choosing the picture that matched the target emotion verbal label; 3) sorting the faces displaying the same facial expression; 4) sorting the faces displaying the same identity.
Results: Recognition accuracy in all three groups was better for positive emotions and neutral expressions than negative emotions, consistent with previous studies. AD patients were more impaired in the recognition of overall emotions and neutral faces than a-MCI and CS subjects. Compared with CS, a-MCI did not differ significantly in their emotion recognition abilities. When segregated by emotions, we found significant differences in emotion recognition between the diagnostic groups for fearful and sad faces. In particular, AD patients and a-MCI subjects differed significantly from CS in fearful face recognition; AD patients also had impairment in recognizing facial expressions of sadness. Only patients with AD were impaired on the facial identity task. The predominant pattern across all groups and emotions was of a better recognition of emotions when displayed by young faces instead of either adult or old faces.
Conclusions: A selective impairment in recognition of facial expressions of fear is already present in patients with a-MCI. An additional deficit in processing of sad faces emerge with AD progression and may be related to the degeneration progression towards structures implicated in emotional processing systems. An early detection of emotional impairment in MCI phases of dementia may have clinical impact and prognostic value
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
Iconic Language as a Didactic Tool in Regional Geography: Characteristics and Applications
No full textopenIl seguente elaborato indaga il ruolo che il linguaggio iconico come mediatore didattico può assumere nella geografia regionale, ricercando le caratteristiche che dovrebbe avere per essere efficace ed efficiente. L’obiettivo è capire come possa facilitare il tema individuato, promuovendo attaccamento al luogo e di conseguenza un cambiamento educativo significativo. Vengono proposte, inoltre, in ottica teorica attività che potrebbero promuovere gli obiettivi educativi individuati, quindi l’assimilazione di contenuti geografici regionali e la formazione di connessioni personali con l’ambiente circostante.
Attraverso una struttura articolata in quattro sezioni, questo elaborato approfondisce gli aspetti teorici ed operativi dell’argomento.
Nella prima parte si affronta la geografia culturale, delineandone le definizioni e le evoluzioni recenti. Particolare attenzione è rivolta alla geografia culturale su base semiotica e ai concetti chiave di quella umanista. Viene affrontato anche il concetto di regione nelle sue varie declinazioni.
La seconda parte invece si concentra sul linguaggio della geograficità, in particolare su quello iconico. Si discute il ruolo di questo come mediatore didattico e vengono poi ricercate e definite le sue caratteristiche per una corretta comunicazione geografica e anche i possibili vantaggi nella didattica e nell’insegnamento della geografia.
La terza parte illustra una geografia critico-operativa, indagando i concetti chiave e le metodologie didattiche adottate nel suo insegnamento a scuola, seguendo un approccio umanistico a partire dal linguaggio iconico. Vengono anche redatti degli indicatori per analizzare buone pratiche didattiche individuate.
Infine, nella quarta parte si pone attenzione alla didattica della geografia, con un focus sulla geografia attiva. Esaminando una serie di attività si propongono indicazioni pratiche ed esempi utili tenendo conto dei concetti teorici affrontati nei capitoli precedenti.
In sintesi, con questo elaborato si vogliono dimostrare le potenzialità del linguaggio iconico nell’insegnamento di questa disciplina, che nel mondo della scuola è quasi trascurata, con l’intenzione di proporre metodi alternativi al suo insegnamento
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
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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