1,721,098 research outputs found
La social network analysis per la mappatura dei nuovi luoghi del lavoro: soggetti e reti
Full text linkL’articolo utilizza i dati ricavati dai social network, in particolare Twitter, per
analizzare le reti di relazioni, le comunità di utenti e le loro caratteristiche rispetto ai
nuovi luoghi del lavoro (Coworking, Makerspace e FabLab) 1 .
Nell’ambito della ricerca urbana, i dati generati dagli utenti per mezzo dei social
network si stanno sempre di più consolidando come fonti integrative (Calissano et al.,
2018) per ricostruire alcune dinamiche relazionali – anche tra soggetti urbani
(istituzioni, associazioni, ecc.) – che tipicamente le basi di dati convenzionali non sono in
grado di documentare.
Oltre alle grandi potenzialità queste fonti hanno però dei limiti che vanno riconosciuti
(Giglietto et al., 2012), soprattutto nella prospettiva di costruire metodologie replicabili.
Infatti, i dati prodotti dai social media sono generati volontariamente da utenti, ma è poi
la società che detiene il servizio a definire, in base a scelte di natura commerciale e
strategica, quali informazioni rendere disponibili verso l’esterno e in quali termini (Pucci
et al., 2015). Tali condizioni possono mutare nel tempo, come dimostra il caso di
Instagram che ha modificato, restringendole, le proprie policy di accesso ai dati. Inoltre,
la diffusione dei social media tra gli utenti risponde a logiche che non sono prevedibili a
priori e che possono generare grandi variazioni in tempi ridotti, rendendo molto difficile
analizzarne gli usi nel tempo. Infine, le stesse caratteristiche dei social media producono
comunità di utenti diversificate rispetto alla popolazione media in funzione della loro
penetrazione per fasce di età, paesi, ecc. La scelta qui operata di utilizzare Twitter come
fonte di dati, va ricercata nel fatto che, nonostante il calo complessivo di utenti negli
ultimi anni (statista.com, 2018), rimane il social network di riferimento per le comunità
di giovani professionisti; ma anche nella disponibilità, tramite autenticazione e
attraverso API (Morstatter et al., 2013), di una serie di informazioni molto utili sui
singoli account
Urbanità sempre più «vicina»? Un’indagine sull’accessibilità stradale nella regione urbana milanese
No full text
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
A difficult choice for tiny pests:host-seeking behaviour in Xenos vesparum triungulins
Full text linkThe first-instar larvae of strepsipteran parasites, commonly referred to as otriungulinso, are the host-seeking stage: they must locate, invade and successfully develop in the new host, in order to start their parasitic cycle. Little information is available about the behaviour of Xenos vesparum triungulins. They emerge in batches from the endoparasitic female infecting Polistes dominulus, the primary host, and reach the nest through a vector (a foraging wasp or the parasitised wasp itself). Once there, they have the possibility to penetrate into wasp immatures at different developmental stages. In this study, we performed preliminary analyses aimed to investigate which cues are important to direct triungulin movements during their brief stay in wasp nests. In laboratory conditions we selectively presented different stimuli to Xenos larvae: apparently, the host larva itself is attractive in an open arena, but not inside a confined space, nor are epicuticular compounds of wasp larvae able to control triungulin movements. These are more likely oriented by their gregarious behaviour, whereas light (positive phototaxy) may at a previous stage enhance their emergence via the brood canal opening in the female cephalothorax
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
Exercise, Dialysis, and Environment: A Narrative Review in an Ecological Perspective
No full textBackground: Patient empowerment and environmental sustainability may contribute to creating efficient and resilient healthcare models. Chronic kidney diseases call for a sustainable approach aimed at improving physical function and mental health of patients and possibly contributing to the slowing down of the evolution toward the end stage of renal disease (ESRD) with a reduction of the environmental and economic impact. Summary: Multidisciplinary interventions should be implemented particularly, at the final stages when patients are exposed to sedentariness, reduced health-related quality of life (HR-QoL), high cardiovascular morbidity and mortality, and the healthcare services to high costs, and participation in environmental pollution. Ecological strategies based on specific nutritional approaches, exercise, and environment should be designed and tested. In particular, the introduction to physical exercise represents a useful replacement therapy to counteract the hazards derived from the sedentary behavior of ESRD patients, with low physical function associated with poor clinical outcomes. A more active and healthy lifestyle, particularly in the natural environment, could impact HR-QoL, mental and physical well-being but also on socialization, with lower anxiety and fatigue stress levels. Otherwise, combining sustainable exercise models into the patient’s daily routine can be enhanced by the biophilic design called to reproduce a natural environment in the dialysis center. Finally, the involvement of the personnel and the health professionals in properly managing the exercise interventions and the related factors (location, modality, dose, intensity, and duration) might improve the patients’ participation. In particular, ecological programs should be broadly inclusive and aimed to target the lowest performing populations through minimal feasible doses of exercise. Key Messages: Moving toward an ecological framework of lifestyle change in the very advanced stages of kidney disease, the potential synergies between environment, diet, and exercise may improve the physical and mental health of the patients and reduce the impact of dialysis
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