1,720,976 research outputs found
Demodex brevis varietà capitis. Un acaro parassita del complesso pilosebaceo della cute del capo dell'uomo.
No full textViene, per la prima volta, descritto il Demodex brevis var. capitis, una nuova varietà di acaro Demodicidae isolato dalle ghiandole sebacee di un soggetto calvo con alopecia
seborroica. Gli Autori discutono la plasticità biologica di questo acaro che sembra in grado di adattarsi a substrati differenti modificando la propria morfologia, come notoriamente si verifica negli acari del genere Sarcoptes. Tale
“tendenza” ad adattarsi alla cute del capo è già presente in embrione nella popolazione originaria localizzata a livello delle gene nasali. Ciò potrebbe consentire di rilevare, con
molto anticipo, la possibilità di adattamento di questo acaro alla cute del capo e, dunque, di rilevare l’effettiva “tendenza”, da parte di questi acari, a concorrere nel determinismo
della calvizie favorendo fattivamente l’iperproduzione
sebacea ed uno stato patologico cronico della cute
Diagnosi non invasiva di scabbia attraverso l’Esame Diretto delle Polveri Ambientali (E.D.P.A.®)
No full textDermatite da Aeroglyphus robustus (Glycyphagoidea: Aeroglyphoidae): prima segnalazione in Italia
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
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
Body mass index and skinfold thickness versus bioimpedance analysis:fat mass prediction in children.
No full textChildhood obesity increases the risk of morbidity whether or not obesity persists into adulthood. Measurement of body fat content using bioimpedance analysis (BIA) is a useful tool in epidemiologic studies. Both tricep skinfold thickness (TST, mm) and body mass index (BMI, kg/m(2)) are indirect, simple methods and easy to perform for assessing body composition. These methods are generally accepted as good clinical measures for defining childhood obesity. The aim of our study was to evaluate fat mass (FM, kg and %) measurements using TST and BIA (50 kHz) in a cohort of 6-year-old Italian children. A total of 228 southern Italian children (121 boys, 107 girls), randomly selected in nine local primary schools, were included in the study. The correlation between methods for measuring FM was calculated. Linear regression analysis showed a significant positive correlation between FM measured with BIA and BMI ( r=0.92, p<0.001) and with TST ( r=0.79, p<0.001). We conclude that FM measurement using TST and BIA is comparable in different BMI ranges. However, BIA is a useful and alternative method for detecting body composition in children and may be a more precise tool than TST for measuring FM in epidemiological studies in pediatric populations
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
Indoor dust direct examination (E.D.P.A.®) and biotic pollution in confined environments.
No full textIndoor biotic pollution is a condition in which living organisms cause infestations in confined environments and they are often represented by insects and mites of medical , agri-food , industrial, or forensic interest, depending on the environment and on the point of view taken into consideration. Indoor infestations can lead to several different problems, above all dermatological ones, due to the unavoidable interaction between humans and arthropods. Therefore it is necessary to know the causes to be able to act targetly and remove the problems (1,2). The Indoor Dust Direct Examination (E.D.P.A.®) is a patented diagnostic method, exclusively performed in the Urania Research Center in Perugia (Central Italy), that is able to detect the traces left by insects and mites in confined environments, through the examination of dust samples simply collected by sweeping the dust of the floor of every indoor area (3). The dust examination requires a global screening of the material, which is initially sifted and then analysed both at a dry and liquid states, until it leads to the detection of the traces and to the isolation and identification of the agent suspected to be the cause of the infestation (4,5). Among the fields of application of the E.D.P.A.®, the medical sector is the most relevant. Several cases of dermatitis of unknown environmental origin can be disclosed with the E.D.P.A.® , that allows to identify the etiologic agent, to discover where it is located, to discern if it is of outdoor origin, and then to intervene targetly to remove the cause and consequently to achieve spontaneous healing of dermopathy (6). In the year 2017 in housedust samples of n. 270 individuals suffering from dermatitis examined at URANIA Research Center the presence of mites was detected, above all of the genres Pyemotes (33,3%), Glycyphagus (16,2%) and Tydeus (14,8%) and in other n. 202 house dust samples the presence of insects, above all of the genres Scleroderma (13,8%), Solenopsis (17,3%) and Ctenocephalides (9,9%) . Those reports allowed to diagnose the environmental origin of the dermatological problem, confirmed by the patients’ quick healing after the targeted house disinfestation. In the agri-food and industrial fields, the E.D.P.A.® enables to locate sites of larval infestation, to identify the species, to discover the origin of the pests and to calculate the time of the infestation, in order to have the control of the storages and of the production sites of the factory. It allows also to solve potential controversies between the enterprise and its customer. In the forensic field, the E.D.P.A.® can give also its contribution, detecting all the traces left in confined environments, discerning between their indoor or outdoor origin from the different concentration of the population of mites and insects or the different concentration of pollens and allows to find out if an area of interest was alterated. In conclusion, the E.D.P.A.® allows to monitor every indoor environment to different aims through the examination of the dust samples. They can be sent to URANIA Research Center from all over the world, as the collected material does not undergo damages during shipping, nor it alterates for even long delivery times
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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