1,720,958 research outputs found
Caratterizzazione dell'esposizione ad agenti biologici a diffusione aerogena nei lavoratori dell'industria della lana
No full textSensibilizzazione epicutanea a metalli e dermatite allergica da contatto: analisi di una casistica ambulatoriale
No full textWe have retrospectively analyzed the clinical and anamnestic features of 233 out-patients (197 females and 36 males; mean age: 33 years; SD: +/- 13.3) with epicutaneous sensitization to metals, who had been examined at the department of allergology of our institution during one year. Among females, nickel sulphate was the metallic salt which most frequently resulted positive at patch testing (87.8% of cases), followed by cobalt chloride (23.6%) and potassium bichromate (10.2%). Nickel was the most common sensitizing metal also in males (58.3%), among whom sensitization to chromate resulted second in order of frequency (30.6%), and sensitization to cobalt was relatively rare (11.1%). In selected cases, the utilization of additional, specific series allowed to document rare cases of sensitization to metallic salts not included in the standard patch test series (copper sulphate, cadmium chloride, zinc stearate, phenylmercuric nitrate). 78 patients were sensitized to more than one metal. Skin sensitivity to metals was often linked to allergic disease familiarity and/or to sensitization toward type I allergens. Allergic contact dermatitis was diagnosed in 80 patients: cutaneous manifestations had been present on average for over four years, sometimes in generalized or persistent form. An occupational contact with the causative metals was identified in 15 cases. However, the occupational origin of the disease could never be documented with certainty, due to concomitance of frequent non-occupational exposures and to lack of information on pre-employment skin sensitivity status. Thus, the value of patch testing, during both pre-employment screening and health surveillance, is emphasized
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
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
Rischi professionali nelle Forze dell'Ordine
No full textIl presente lavoro cerca di identificare i fattori professionali di rischio (fisici, chimici, biologici, psicologici), variabili in funzione dei compiti e delle mansioni, ai quali è esposto l’eterogeneo personale operante nelle Forze dell’Ordine. La lotta alla criminalità e il mantenimento dell’ordine pubblico comportano rischi (talora mortali) di natura traumatica, oltre a esporre ad affaticamento psicofisico e sensoriale, a condizioni macro- e microclimatiche sfavorevoli, al rischio di baropatìe (aeronavigazione, attività subacquee), a rumore (generato dalle armi da fuoco e da numerose altre fonti), a vibrazioni e scuotimenti (armi automatiche, mezzi di trasporto), al rischio di infortuni elettrici, a radiazioni ionizzanti (raggi X e ) e non ionizzanti (raggi ultravioletti, microonde e onde radio, campi elettromagnetici). Fattori di rischio chimici comprendono monossido di carbonio e altri prodotti di combustione (incendi, traffico veicolare), sostanze liberate in caso di incidenti chimici, aggressivi irritanti-lacrimogeni, piombo (poligoni di tiro, officine, inquinamento ambientale), solventi, lubrificanti e oli da taglio (officine, carrozzerie), materiali e reattivi di laboratorio, agenti irritanti e/o allergizzanti contenuti nei guanti. I principali rischi biologici sono il tetano, le malattie a trasmissione ematica (epatiti virali, AIDS), le malattie a diffusione aerea (es. tubercolosi, legionellosi, meningite cerebrospinale epidemica), le zoonosi trasmissibili dal cane o dal cavallo. Frequente è infine la patologia da stress, con manifestazioni emotive, psicosomatiche e comportamentali inquadrabili, a seconda dei casi, nella sindrome del burn-out, nel disturbo post-traumatico da stress, in disturbi dell’adattamento.
La presenza di numerosi e diversificati rischi occupazionali impone anche nell’ambito delle Forze dell’Ordine l’applicazione dei princìpi della medicina del lavoro, comprendenti identificazione e valutazione del rischio, formazione e informazione, misure preventive tecnico-ambientali, dispositivi di protezione individuale, sorveglianza sanitaria e monitoraggio biologico, interventi clinici (diagnosi, terapia e riabilitazione degli infortuni sul lavoro e delle malattie professionali), adeguato riconoscimento medico-legale e assicurativo dei danni alla persona eventualmente subiti
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
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