170,490 research outputs found
L’ Iniziativa Adriatico-Ionica e la costituzione della Macroregione
No full textThe purpose of this article is to analyze the recent creation of Adriatic-Ionian Macroregion as a natural consequence of the Adriatic-Ionian Initiative. This tool aims at redeveloping the political and administrative partnership among maritime countries and also to promote a common action regarding collective interests. In the end, the analysis seeks to highlight the dimension of safety and security practices implemented by the States
La “romanizzazione” dell’ Italía ionica: nuovi dati
No full textL'articolo pubblica i commenti critici di R. Belli Pasqua, M. Gras e G. Bejor redatti in occasione della presentazione ufficiale degli Atti del Convegno, curato da L. Lepore e C. Giatti, dal titolo "La romanizzazione dell’ Italía ionica. Aspetti e problemi, tenutasi a Firenze nel marzo 2019
Reciprocal Face-to-Face Communication between Rhesus Macaque Mothers and Their Newborn Infants
No full textSummaryHuman mothers interact emotionally with their newborns through exaggerated facial expressions, speech, mutual gaze, and body contact, a capacity that has long been considered uniquely human [1–4]. Current developmental psychological theories propose that this pattern of mother-infant exchange promotes the regulation of infant emotions [4–6] and serves as a precursor of more complex forms of social exchange including perspective taking and empathy. Here we report that in rhesus macaques, mother-infant pairs also communicate intersubjectively via complex forms of emotional exchanges including exaggerated lipsmacking, sustained mutual gaze, mouth-mouth contacts, and neonatal imitation. Infant macaques solicit their mother's affiliative responses and actively communicate to her. However, this form of communication disappears within the infant's first month of life. Our data challenge the view that the mother-infant communicative system functions in order to sustain proximity and that infants are simply passive recipients in such interaction. Thus, emotional communication between mother and infant is not uniquely human. Instead, we can trace back to macaques the evolutionary foundation of those behaviors that are crucial for the establishment of a functional capacity to socially exchange with others
Altered shapes, same people: Scaphocephaly in the early modern Bucharest
No full textPremature sagittal suture synostosis was identified in eight specimens dated between the 18th and 20th centuries CE, of which seven are kept within the Rainer Osteological Collection in Bucharest and one was retrieved from the archaeologically investigated Saint Sava Church Cemetery. Our study focused on metric measurements, aiming to compare these specimens with three other samples comprising normal and scaphocephalic individuals, with both a Romanian and worldwide distribution. In total, 374 individuals were used in this study. However, although metric measurements clearly show that these individuals were different in their appearance, the socio-cultural data point to them being normal members of the society, as suggested by the funerary features of the archaeological specimens and their position within the Rainer Osteological Collection
Evaluation of discriminant functions for sexing skulls from visually assessed traits applied in the Rainer Osteological Collection (Bucharest, Romania)
No full textThe sexing of human skeletal remains based on visual scoring of descriptive traits on the skull is useful for both forensic and bioarchaeological studies, given that many such features preserve well in the field and can be assessed quickly. The goal of our work is to evaluate the accuracy of this method on an age-balanced, known sex, random sample of 360 modern adult crania in the Rainer Osteological Collection. Consistent with Walker (2008), we scored glabella area (G), the mastoid process (Ma), the mental eminence (M), the orbital edge (O) and the nuchal crest (N), on a five-point scale. We generated sex discriminant functions (logistic), selected the most accurate of them, and subsequently applied them to archaeological samples from Romania. Each skull feature showed significant score differences by sex. Eight out of 31 discriminant functions passed criteria of high accuracy (∼90%), sex bias (±2%), and ease of use (direct calculation of sex). The best estimates were obtained for the 30–60 age groups. Further testing these functions on six archaeological samples showed high percentages of agreement with the sex assessed on the coxal bone. The study also indicated that, although easy to learn by novices, the method of visually scoring the skull traits depends on prior experience with human osteology. The accuracy of the method may be influenced by geographical and historical differences which are bound to exist between populations
Nitretação ionica em aços baixo carbono
No full textDissertação (mestrado) - Universidade Federal de Santa Catarina. Centro de Ciencias Fisicas e MatematicasAmostras de aço 1020 são nitretadas ionicamente num plasma de N2+ H2. São feitos estudos da evolução das camadas de nitretos em função da temperatura, do tempo de nitretação e da composição da mistura gasosa N2 + H2. No estudo da temperatura de nitretação, são nitretadas amostras durante três horas em temperaturas que variam de 400 a 600 °C . Este estudo é feito para duas composições da mistura gasosa: 80%N2 + 20%H2 e 20%N2 + 80%H2. No estudo sobre a influência do tempo de nitretação são nitretadas amostras com tempos entre 0.25h e 12.0h. Este estudo é realizado com uma única composição da mistura (80%N2 + 20%H2) e em duas temperaturas: 490 e 550°C . No estudo da mistura gasosa N2 + H2 são nitretadas amostras em 480°C durante uma hora, com misturas gasosas que variam entre 10 e 100% de N2. As camadas de nitretos formadas são analisadas por metalografia, difração de raios X e microdureza. É identificada a formação de uma camada branca de fase e -Fe2-3N e/ou g'-Fe4N . Pode haver também a formação de uma camada escura, sob a camada branca, identificada como uma mistura das fases g' e nitroferrita. A microdureza da camada branca é da ordem de 800 Vickers e a da camada escura é da ordem de 400 Vickers enquanto que a microdureza do aço 1020 não nitretado é de 200 Vickers. A espessura da camada branca, em função da temperatura de nitretação, passa por um máximo e depois decresce. Em função do tempo de nitretação, a camada branca também passa por um máximo de espessura e depois decresce, porém de maneira mais suave. A camada escura, que se forma sob a camada branca, tem um crescimento contínuo no início do processo de nitretação com tendência à saturação no final. Esta camada pode ser considerada como um estágio intermediário de decomposição da camada branca. Uma taxa de hidrogênio maior que 5%, na mistura N2 +H2, diminui a espessura da camada de nitretos e evita a formação da camada escura. A mistura de 95%N2 + 5%H2 apresenta os melhores resultados quanto a espessura e microdureza da camada de nitretos bem como da estabilidade do plasma
Going Beyond Counting First Authors in Author Co-citation Analysis
No full textThe 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
Progetto Regione Emilia Romagna Moniter: Speciazione Ionica del particolato
No full textVengono illustrati e interpretati i dati di composizione ionica ed elementare di Particolato atmosferico PM10, M2.5 e PM1 ottenuti nell'ambito del progetto triennale Moniter (http://www.arpa.emr.it/pubblicazioni/moniter/generale_619.asp ) finanziato dalla Regione Emilia Romagna e coordinato dall'ARPA ER. Compito dell'UO Ciamician è stato quello di analizzare oltre 800 campioni diaerosol atmosferico raccolto in varie località della Provincia di Bologna al fine di studiare l'influenza delle emissioni atmosferiche dell'Inceneritore municipale della città presso Granarolo. I risultati finali sonostati presentati a dicembre 2011. Gli autori sono in attesa di autorizzazione per la pubblicazion
Analisi dei fenomeni di propagazione ionica nei terreni argillosi di una frana di Costa della Gaveta
No full textIl comportamento meccanico delle Argille Varicolori di Costa della Gaveta, a Potenza est, è molto influenzato dalla composizione del fluido interstiziale; in particolare, la riduzione naturale della soluzione salina sodica originaria è considerabile una probabile causa di decadimento meccanico. Numerosi risultati sperimentali di laboratorio mostrano anche che l’aumento di concentrazione dello ione potassio nella soluzione interstiziale rapidamente produce aumento di resistenza a taglio e riduzione di velocità di deformazioni/scorrimenti viscosi. Per valutare la possibilità di ridurre la velocità di scorrimento di una colata di Costa della Gaveta incrementando la resistenza dei terreni in frana, è stato realizzato un piccolo campo prove di colonne di KCl nel quale, mediante advezione e diffusione ionica, si intende far aumentare la concentrazione ionica della soluzione interstiziale del terreno circostante. Parallelamente, per interpretare i fenomeni di sito, in laboratorio, si inducono e si monitorano fenomeni di trasporto ionico in provini dello stesso terreno ricostituiti con acqua distillata oppure con soluzioni di NaCl e KCl. I dati della sperimentazione permettono di cogliere gli aspetti fondamentali del fenomeno di diffusione oltre che di tarare i modelli numerici. La costruzione delle isoterme di adsorbimento permette di valutare l’entità dei processi di scambio ionico che possono verificarsi durante i transitori di diffusione
Hydrobia ionica Esu & Girotti, 2019, n. sp.
No full textHydrobia (s.l.) ionica n. sp. (Figs 2C, D; 4 A-C) urn:lsid:zoobank.org:act: 8D0FEDB0- E 195-4827- A 3 EF-C 2D25 A 445D1 B Pseudamnicola (Staja) sp. – Esu et al. 1994: 189, pl. 2, fig. 4a. TYPE MATERIAL. — Holotype: MPUR7-3899 (Fig. 4 A), H = 4.5 mm, W = 2.5 mm. — Paratypes: MPUR7 -4197/2, 4199/1, 3900/40. DERIVATION OF NAME. — Named after the Ionian Sea, whose shoreline is near the type locality. TYPE HORIZON. — Limy mudstone layers of Galatone Fm at Galatone (Esu et al. 1994; Bossio et al. 1998). TYPE LOCALITY. — Galatone (Lecce, Apulia, Italy) (40°8’27.03”N, 18°03’0.37”E). TYPE AGE. — Chattian (Late Oligocene). DIAGNOSIS. — Small-sized shell, ovately conical, with up to 5 slightly convex whorls, the last large and elongate. Aperture pear-shaped, relatively high and elongate, adapically barely angulate, somewhat flared and slightly thickened inside. Umbilicus slit-like. DESCRIPTION Shell small, solid, thick-walled, ovately conical, with up to 5 slightly convex whorls, the last large, elongate, exceeding two-thirds of shell height. Early whorls slowly increasing, the last faster and somewhat descending (Figs 2C; 4 Ab, Ba). Suture shallow, oblique between the penultimate and ultimate whorl. Protoconch of c. 410 µm maximum diameter, smooth, consisting of one slightly convex whorl. Boundary to teleoconch distinct by the formation of closely spaced growth lines (Fig. 2D). Teleoconch glossy, with very delicate and thin prosocline growth lines. An axial swelling occurs sometimes in the last whorl towards the aperture. Aperture pear-shaped, high, elongate, adapically barely angulate and abapically rounded, somewhat flared and slightly thickened inside; peristome continuous, columellar lip almost completely adherent to the last whorl, outer lip straight in lateral profile. Umbilicus slit-like. Range dimensions: H = 4-4.5 mm, W = 2.5-2.7 mm, H/W = 1.48-1.8. Provisionally, Esu et al. (1994) assigned this stout form to the subgenus Pseudamnicola (Staja) Brusina, 1897, currently considered a separate genus of the family Hydrobiidae (Harzhauser et al. 2015; MolluscaBase 2018b). Examination of further material allowed distinguishing this species from Staja, which is a Miocene Eastern European taxon rich in several species (cf. MolluscaBase 2018b), characterised by a very small size (dimensional range: H = 1.6-2.5 mm, W = 1-1.2 mm) and a mainly conical shell with regularly growing whorls (cf. Brusina 1897; Jekelius 1944). The assignment of ionica n. sp. to the same genus as galatoniana n. sp. is likely supported by similar conchological characters between the two species, such as hydrobioid shell shape with slightly convex whorls, last whorl higher, ovate-elongate and barely flared aperture, and smooth protoconch. Hydrobia (s.l.) ionica n. sp. differs from H. (s.l.) galatoniana n. sp. in having a more globose shell, a wider apical angle, a smaller protoconch, the last whorl proportionally wider and higher, the aperture more elongate, and a smaller H/W (max) ratio (1.8 vs 2.08). It differs from the coeval H. dubuissonii hydruntina from the Upper Oligocene marls of Otranto bauxite quarry (Esu & Girotti 2010) in being conical-ovate in shape, in having a less acute spire, a proportionally higher last whorl and wider and more elongate aperture. Hydrobia dubuissonii from Oligocene deposits of France and Belgium (see above) differs from H. (s.l.) ionica n. sp. in having a conical-pyramidal shape, a more acute spire and a smaller and more ovate aperture.Published as part of Esu, Daniela & Girotti, Odoardo, 2019, Two new oligohaline Hydrobia (s. l.) (Caenogastropoda) from the transitional Upper Oligocene Galatone Fm (Apulia, Southern Italy), pp. 1-9 in Geodiversitas 41 (1) on pages 6-7, DOI: 10.5252/geodiversitas2019v41a1, http://zenodo.org/record/367872
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