135,447 research outputs found
Le identità narrate. Percorsi autobiografici di costruzione del sé professionale
No full textIl contributo approfondisce la centralità che nei percorsi di ricollocazione professionale assume la narrazione autobiografica e il ripensamento delle proprie esperienze di vita, oltre che di formazion
Ericaria giacconei Serio & G. Furnari 2021, sp. nov.
No full text<i>Ericaria giacconei</i> Serio & G.Furnari, sp. nov. (Figs 2-5) <p>Thalli caespitose, attached to the substrate by a robust and compact basal disc (3-5 cm in diameter) from which 4-20 cauloids, cylindrical, up to 30 cm high and 3-5 mm in diameter, arise; apex of cauloids smooth, not prominent, never surrounded by spiniform appendages, sometimes surrounded by short cylindrical non-spiny young primary branches; primary branches cylindrical, bearing branches of higher order cylindrical, and with subequal development that give the thallus a cupressoid habit; tophules and aerocysts absent; in cross section, medulla formed by small rounded cells, cortex made of roundish cells with thin walls and meristoderm formed by a layer of rectangular cells twice longer than wide; receptacles terminal, cylindrical-ovoid to clavate, 0.5-1 cm long and 1-2 mm wide, with grouped conceptacles; conceptacles bisexual, subspherical, located at the base of spinous deciduous appendages; oogonia occupying the floor of the conceptacle and antheridia on branched hairs.</p> <p> HOLOTYPE. — <b>Italy</b>, Straits of Sicily, Porto Palo di Capo Passero, Contrada Guardiana, 36°39’03”N, 15°04’37”E, 0.50 m depth, 11.I.2020, fertile specimen, coll. Serio, (CAT [CAT 2716] (Figs 3, 4).</p> <p>ISOTYPE. — Same data of the holotype; CAT [CAT 2717, CAT 2718]).</p> <p> E TYMOLOGY. — The specific epithet honours Professor Giuseppe Giaccone, who first found this species, for his significant contributions to the study of the <i>Cystoseira</i> complex.</p> <p>TYPE LOCALITY. — Porto Palo di Capo Passero (Sicily, Italy), 36°39’03”N, 15°04’37”E.</p> <p> DISTRIBUTION. — Type locality; Punta D’Aliga (Sicily, Italy) (Giaccone 1986 as <i>C. hyblaea</i>); Isola delle Correnti (Sicily, Italy) (Pizzuto 1999 as <i>C. crinita</i>); Kelibia (Tunisia) (Bouafif <i>et al.</i> 2016 as <i>C. hyblaea</i>) (Fig. 1).</p> <p> HABITAT. — Plants living on semi-exposed rocky shores at 0.2- 1.0 m depth. Species vicariant of <i>E. amentacea</i> (Giaccone, 1986 as <i>C. amentacea</i>).</p> REMARKS <p> Other figures (as “ <i>C. hyblaea ”</i>): Giaccone (1986, figs 1, 2), Cormaci <i>et al.</i> (2012, pl. 111, figs 1-3), Bouafif <i>et al.</i> (2016, figs 21-24).</p>Published as part of <i>Serio, Donatella & Furnari, Giovanni, 2021, Ericaria giacconei sp. nov. (Sargassaceae, Fucophyceae), the species to which the invalidly published Cystoseira hyblaea Giaccone should be referred, pp. 141-151 in Cryptogamie, Algologie 20 (10)</i> on page 143, DOI: 10.5252/cryptogamie-algologie2021v42a10, <a href="http://zenodo.org/record/7819211">http://zenodo.org/record/7819211</a>
Biological invasions in Marine Protected Areas (MPAs): trends in non- indigenous macrophytes in Italian MPAs
Get PDFNon-indigenous species (NIS), widely recognized as one of the main drivers of global change, may in time become invasive, determining significant environmental impacts, such as biodiversity loss and ecosystem services degradation. The impact of NIS on marine habitats within Marine Protected Areas (MPAs), whose major aim is biodiversity conservation, can be significant even highly detrimental. Therefore, monitoring NIS distribution is crucial in these areas for planning effective conservation strategies. Currently, in Italy have been established 29 MPAs that are mainly concentrated in the two great islands, Sicily (7) and Sardinia (6). In Italy, 73 alien macrophytes (10 Chlorophyta, 16 Ochrophyta, 46 Rhodophyta, 1 Tracheophyta) is currently reported. Our research revealed differences among the MPAs with respect to the number of marine alien macrophytes, which could be linked to different reasons such as differences in the number of conducted studies or differences in geographical position. Despite their fundamental role in the conservation of marine biodiversity, MPAs are not immune to biological invasions, evidencing that protection does not hinder the introduction and spreading of NIS. Management actions within MPAs should include the planning of regular monitoring activities which will allow early detections and to follow the spread of species already present. This work represents an important starting point for the creation of a regularly updated list of alien macrophytes within the Italian MPAs
A novel scan statistics approach for clustering identification and comparison in binary genomic data
No full textPublished: 22 September 2016AbstractBackgroundIn biomedical research a relevant issue is to identify time intervals or portions of a n-dimensional support where a particular event of interest is more likely to occur than expected. Algorithms that require to specify a-priori number/dimension/length of clusters assumed for the data suffer from a high degree of arbitrariness whenever no precise information are available, and this may strongly affect final estimation on parameters. Within this framework, spatial scan-statistics have been proposed in the literature, representing a valid non-parametric alternative.ResultsWe adapt the so called Bernoulli-model scan statistic to the genomic field and we propose a multivariate extension, named Relative Scan Statistics, for the comparison of two series of Bernoulli r.v. defined over a common support, with the final goal of highlighting unshared event rate variations. Using a probabilistic approach based on success probability estimates and comparison (likelihood based), we can exploit an hypothesis testing procedure to identify clusters and relative clusters. Both the univariate and the novel multivariate extension of the scan statistic confirm previously published findings.ConclusionThe method described in the paper represents a challenging application of scan statistics framework to problem related to genomic data. From a biological perspective, these tools offer the possibility to clinicians and researcher to improve their knowledge on viral vectors integrations process, allowing to focus their attention to restricted over-targeted portion of the genome
The enteric nervous system : new developments and emerging concepts
Get PDFThe enteric nervous system (ENS) is an integrative neuronal network, organized in two ganglionated plexuses, myenteric and submucosal, composed of neurons and enteric glial cells, controlling the activity of the smooth muscle of the gut, mucosal secretion and blood flow. The ENS contains as many neurons as the spinal cord, and the functional and chemical diversity of enteric neurons closely resembles that of the central nervous system. This highly integrated neural system is also referred to as the ‘brain-in-the-gut’, because of its capability to function in the absence of nerve inputs from the central nervous system.peer-reviewe
Molecular and morphological characterization of Melanothamnus testudinis sp. nov. (Rhodophyta, Rhodomelaceae) and its distinction from Polysiphonia carettia.
No full textThe association between epizoic algae and animals is well known, and turtles are among the animals that most commonly host epibiont communities. The most studied algal component of the epizoic
communities found on turtles is represented by diatoms, while other algal taxa, like the Rhodophyta, are less investigated. During a survey started to study the epibionts associated with loggerhead turtles,
Caretta caretta, cared for at the WWF Sea Turtle Rescue Center of Lampedusa Island (Sicily, Italy), specimens of Rhodomelaceae (Rhodophyta) were collected for taxonomic investigation. The resulting
vegetative, reproductive, and molecular data of those specimens characterised the new species described here as Melanothamnus testudinis sp. nov. We also evaluated the holotype of Polysiphonia
carettia Hollenberg, an epibiont of C. caretta reported from the Mediterranean Sea. This investigation confirmed the distinction of M. testudinis from P. carettia and suggested that previous Mediterranean
and Canarian records of the latter species are probably M. testudinis
MeSH term explosion and author rank improve expert recommendations
Get PDFInformation overload is an often-cited phenomenon that reduces the productivity, efficiency and efficacy of scientists. One challenge for scientists is to find appropriate collaborators in their research. The literature describes various solutions to the problem of expertise location, but most current approaches do not appear to be very suitable for expert recommendations in biomedical research. In this study, we present the development and initial evaluation of a vector space model-based algorithm to calculate researcher similarity using four inputs: 1) MeSH terms of publications; 2) MeSH terms and author rank; 3) exploded MeSH terms; and 4) exploded MeSH terms and author rank. We developed and evaluated the algorithm using a data set of 17,525 authors and their 22,542 papers. On average, our algorithms correctly predicted 2.5 of the top 5/10 coauthors of individual scientists. Exploded MeSH and author rank outperformed all other algorithms in accuracy, followed closely by MeSH and author rank. Our results show that the accuracy of MeSH term-based matching can be enhanced with other metadata such as author rank
Brevi osservazioni su rule of law e sviluppi della teoria di Albert Venn Dicey
No full textQuesta breve ricerca si propone di individuare i fattori di stabilità del sistema
giuridico inglese, anche quando esso è stato chiamato a governare le più
complesse situazioni potenzialmente destrutturanti, giovandosi dell’insegnamento
scientifico e morale tramandato da due titolari della prestigiosa cattedra
intitolata a Charles Viner presso l’Università di Oxford, William Blackstone
(che l’inaugurò nel 1758, tenendola fino al 1766) ed Albert Venn Dicey (vissuto
tra il 1835 ed il 1922), che gli succedette nel 1882, per restare in carica fino
al 1909. In particolare, lo studio ha ad oggetto l’individuazione, nel vasto e ricco
universo scientifico dai due autori tramandato alla conoscenza critica dei
loro successori, di quei principii teorici che, nella concreta esperienza storica,
si sono rivelati – a prescindere dalla previsione che gli stessi due autori avevano
formulato – utili mezzi per impedire che il diritto inglese potesse patire gli effetti
negativi della discontinuità
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