125,497 research outputs found
Secondary vortices in turbulent square duct flow
No full textA linear approach, inspired by hydrodynamic stability theory, is used to describe the presence of large scale coherent vortices for the turbulent flow in a duct of square crosssection. A set of equations for the small-amplitude coherent motion is derived and closed with a simple mixing length strategy. The initial condition that maximizes a chosen functional (related to either the kinetic energy of the coherent motion or the rate of turbulence production) is found through a direct/adjoint numerical approach borrowed from optimal control theory. It is found that different kinds of secondary flows can appear in the duct cross-section, sustained by the mean shear. Some of these optimal states display a symmetry about the bisectors and the diagonals of the duct, in agreement to experimental observations and direct numerical simulations. © 2005 by A. Bottaro, H. Soueid and B. Galletti
Calviria Martens and Curini-Galletti 1993
No full text<i>Calviria</i> Martens and Curini-Galletti, 1993 <p> <b>Diagnosis.</b> Protandric Calviriidae. Epidermis with intra-epithelial nuclei. With a septum in front of the pharynx and a sphincter around the gut above it. Numerous large hyaline vacuoles under the body wall. A single seminal vesicle filled with large sperm. The copulatory organ is directed forwards with atrial needles arranged in a ring. Accessory glandular organ separated and in front of the male atrium. Simple female system with both ovovitelloducts opening in a short female duct and with or without bursa.</p> <p> <b>Type species:</b> <i>Calviria solaris</i> Martens and Curini-Galletti, 1993.</p> <p> <b>Other species:</b> <i>C. sublittoralis</i> Martens and Curini-Galletti, 1993 and <i>C. banyulensis</i> Martens and Curini-Galletti, 1993.</p> <p> <b>Remarks.</b> All three species have four needles in the accessory organ, which is (apparently) not connected to the exterior. Only <i>C. solaris</i> has a small terminal bursa in the female system.</p>Published as part of <i>Schockaert, Ernest R., Curini-Galletti, Marco, Ridder, Wouter De & Artois, Tom, 2011, On the Calviriidae Martens and Curini-Galletti, 1993 (Platyhelminthes, Proseriata), with the description of three new species, pp. 32-46 in Zootaxa 3034</i> on page 43, DOI: <a href="http://zenodo.org/record/203197">10.5281/zenodo.203197</a>
Calviriidae Martens and Curini-Galletti 1993
No full textCalviriidae Martens and Curini-Galletti, 1993 <p> <b>Diagnosis.</b> The Calviriidae are lithophorous Proseriata with an encapsulated brain, a precerebral gut diverticulum, intraepidermal or insunk nuclei and the epidermis completely ciliated. Ovaries anterior of and close to the pharynx, with vitellarian follicles in front of and behind the ovaries. The female duct is short, the oviducts joining behind the male copulatory organ and the female pore behind it (digonoporid condition). A bursa behind the female pore may be present; no genito-intestinal connection. Testes in front of the ovaries. Copulatory organ with atrial needles only or unarmed. With a single or paired seminal vesicles. Accessory glandular organ present, with or without needles, opening into the male atrium or separately. Horizontal pharynx not elongated nor with a long prominent glandular proximal section. A muscular septum in front of the pharynx and a sphincter around the gut dorsal to the pharynx may be present. With prominent frontal glands opening in a sub-terminal depression.</p>Published as part of <i>Schockaert, Ernest R., Curini-Galletti, Marco, Ridder, Wouter De & Artois, Tom, 2011, On the Calviriidae Martens and Curini-Galletti, 1993 (Platyhelminthes, Proseriata), with the description of three new species, pp. 32-46 in Zootaxa 3034</i> on page 34, DOI: <a href="http://zenodo.org/record/203197">10.5281/zenodo.203197</a>
Bibliografia statutaria della Campania (2006-2015)
No full textLa pubblicazione del terzo volume della Bibliografia statutaria italiana prosegue un lungo periodo di collaborazione tra la Biblioteca del Senato della Repubblica e il Comitato italiano per gli studi e le edizioni delle fonti normative dell'Università di Bologna, iniziato nel 1998 e scandito con regolarità decennale dall'uscita degli aggiornamenti bibliografici relativi agli anni 1986-1995 e 1996-2005. L'importanza di un lavoro di raccolta bibliografica nel settore statutario risulta evidente se si considera la varietà dei soggetti produttori (università, istituti culturali, enti locali, deputazioni di storia patria, biblioteche, accademie) e della tipologia dei materiali (monografie, articoli editi in riviste, atti di convegni, tesi di laurea o di dottorato).
il repertorio è strutturato per territori regionali secondo i confini attuali. Nella definizione dell'ambito territoriale da prendere in considerazione si è ritenuto comunque utile adottare un criterio largo e comprensivo, inserendo tanto regioni appartenenti al territorio nazionale la cui produzione normativa ha per ragioni storiche e culturali peculiari caratteristiche (come l'Alto Adige-Sudtirolo), quanto regioni storiche poste al di fuori del territorio nazionale (la Svizzera italiana, l'Istria e la Dalmazia)
Bibliografia statutaria dell'Istria, della Dalmazia, dell'Albania e del Levante (2006-2015)
No full textLa pubblicazione del terzo volume della Bibliografia statutaria italiana prosegue un lungo periodo di collaborazione tra la Biblioteca del Senato della Repubblica e il Comitato italiano per gli studi e le edizioni delle fonti normative dell'Università di Bologna, iniziato nel 1998 e scandito con regolarità decennale dall'uscita degli aggiornamenti bibliografici relativi agli anni 1986-1995 e 1996-2005. L'importanza di un lavoro di raccolta bibliografica nel settore statutario risulta evidente se si considera la varietà dei soggetti produttori (università, istituti culturali, enti locali, deputazioni di storia patria, biblioteche, accademie) e della tipologia dei materiali (monografie, articoli editi in riviste, atti di convegni, tesi di laurea o di dottorato).
il repertorio è strutturato per territori regionali secondo i confini attuali. Nella definizione dell'ambito territoriale da prendere in considerazione si è ritenuto comunque utile adottare un criterio largo e comprensivo, inserendo tanto regioni appartenenti al territorio nazionale la cui produzione normativa ha per ragioni storiche e culturali peculiari caratteristiche (come l'Alto Adige-Sudtirolo), quanto regioni storiche poste al di fuori del territorio nazionale (la Svizzera italiana, l'Istria e la Dalmazia)
Bibliografia statutaria delle Marche (2006-2015)
No full textLa pubblicazione del terzo volume della Bibliografia statutaria italiana prosegue un lungo periodo di collaborazione tra la Biblioteca del Senato della Repubblica e il Comitato italiano per gli studi e le edizioni delle fonti normative dell'Università di Bologna, iniziato nel 1998 e scandito con regolarità decennale dall'uscita degli aggiornamenti bibliografici relativi agli anni 1986-1995 e 1996-2005. L'importanza di un lavoro di raccolta bibliografica nel settore statutario risulta evidente se si considera la varietà dei soggetti produttori (università, istituti culturali, enti locali, deputazioni di storia patria, biblioteche, accademie) e della tipologia dei materiali (monografie, articoli editi in riviste, atti di convegni, tesi di laurea o di dottorato).
il repertorio è strutturato per territori regionali secondo i confini attuali. Nella definizione dell'ambito territoriale da prendere in considerazione si è ritenuto comunque utile adottare un criterio largo e comprensivo, inserendo tanto regioni appartenenti al territorio nazionale la cui produzione normativa ha per ragioni storiche e culturali peculiari caratteristiche (come l'Alto Adige-Sudtirolo), quanto regioni storiche poste al di fuori del territorio nazionale (la Svizzera italiana, l'Istria e la Dalmazia)
Gli eventi della Festa internazionale della Storia di Bologna: temi e metodologie
No full textIl contributo dimostra che la Festa internazionale della Storia di Bologna, che ogni anno organizza mediamente quasi 200 eventi, si distingue per una grande varietà di metodologie (conferenze, tavole rotonde, presentazioni di volumi, laboratori, rievocazioni storiche, visite guidate, passeggiate storico-artistiche, esposizione da parte di studenti di ogni ordine e grado degli esiti delle proprie ricerche, ecc.) e temi (cinema, teatro, alimentazione, musica, sport, moda, scienze e ambiente, arte e patrimonio). Questa ricchezza, che nasce dalla profonda rete di istituzioni, enti, biblioteche, archivi, scuole, università e collaboratori che l'organizzazione della Festa ha saputo creare attorno a sé, permette di avvicinare molteplici tipi di pubblico alla conoscenza storica e alla tutela del patrimonio storico-artistico.The contribution shows that the International History Festival in Bologna, which every year organises an average of almost 200 events, is characterised by a great variety of methodologies (conferences, round tables, book presentations, workshops, historical re-enactments, guided tours, historical-artistic walks, exhibitions by students of all levels of education of the results of their own research, etc.) and themes (cinema, theatre, food, music, sport, fashion, science and environment, art and heritage). This richness, which stems from the deep network of institutions, organisations, libraries, archives, schools, universities and collaborators that the organisation of the Festival has been able to create around it, makes it possible to bring a wide range of audiences closer to historical knowledge and the protection of historical and artistic heritage
Archimonocelis carmelitana Martens & Curini-Galletti 1993
No full text<i>Archimonocelis carmelitana</i> Martens & Curini-Galletti, 1993 <p>(Fig. 4 E)</p> <p> <b>Material</b>: Apulia, Italy: Santa Maria di Leuca (Lecce), cave ‘la Principessa’(lat. 39°47’58.50”N, long. 18°22’27.86”E), about 5 m deep in medium to coarse sand, May 2005: two whole mounts (ZMC-62;63), two specimens processed for karyology. Porto Cesareo (Lecce): Torre Scianuli, about 7 m deep in pockets of sediments (mostly shell fragments) on a limestone cliff, May 2005: seven whole mounts (ZMC-64/70), four specimens processed for karyology.</p> <p> <b>Description.</b> Specimens are characterized by an elongate and extremely slender (2–3 µm broad), tubular stylet, with a slightly inflated and oblique basis, 7.5–9 µm in diameter, and with a narrow, oblique, distal tip. Size of stylet is 126 + 6.3 µm and 114 + 7.78 µm long in the samples from Santa Maria di Leuca (n=4) and Torre Scianuli (n=11) respectively. The stylet is connected to two very fine, feebly sclerotized companion spines, 130–156 µm long, about 2 µm broad (fig 4 E). With numerous copulatory spines, numbering 125 + 9 and 97 + 17 in the two samples. These spines are extremely slender, with a stalk about 1 mm broad, and with a slightly falcate apex, provided with a very small, obtuse subterminal tooth. Copulatory spines proximal to the stylet are about 100 µm long; they progressively become shorter, to about 50 µm long, distal to the stylet.</p> <p> <b>Karyotype.</b> Chromosome number: n = 9; FN =9. All chromosomes are acrocentric, slightly differing in length. Chrom. I = r.l.: 13.47 + 0.48; c.i.: 3.36 + 0.62 (t); Chrom. II = r.l.: 12.95 + 0.20; c.i.: 3.55 + 1.34 (t); Chrom. III = r.l.: 12.50 + 0.87; c.i.: 3.62 + 0.12 (t); Chrom. IV = r.l.: 11.92 + 0.34; c.i.: 3.81 + 0.20 (t); Chrom. V = r.l.: 11.54 + 0.26; c.i.: 3.93 + 3.62 (t); Chrom. VI = r.l.: 10.68 + 0.45; c.i.: 8.78 + 4.86 (t); Chrom. VII = r.l.: 10.23 + 0.31; c.i.: 4.31 + 0.15 (t); Chrom. VIII = r.l.: 8.69 + 0.64; c.i.: 5.22 + 0.37 (t); Chrom. IX = r.l.: 7.95 + 0.57; c.i.: 5.71 + 1.46 (t) (based on the measurements of six spermatogonial plates from specimens from Torre Scianuli).</p> <p> <b>Remarks.</b> <i>A. carmelitana</i>, common and widespread in the eastern Mediterranean, had already been reported for the area of Porto Cesareo (Martens & Curini-Galletti, 1993), which represents the westernmost record for the species. In comparison to the Apulian samples, specimens from the type locality (Israel: Cape Carmel, Haifa) have a smaller and stouter stylet, 97–105 µm long and 3.5–4 µm wide; the copulatory spines are shorter, ranging 52–66 µm in length. Furthermore, the presence of companion spines was not reported (Martens & Curini-Galletti, 1993). However, written observations accompanying the camera lucida drawings of the karyological slides (Curini-Galletti, own preserved material) mentioned the presence of two 'long, evanescent' spines in the Israelian specimens, which were later not included in the original description, based on whole mounts, where these structures are indeed very difficult to be appreciated. The general arrangement of the copulatory structures, number of copulatory spines, and the nearly identical karyometrical data among Israelian and Apulian populations allow to assume that a single, wide-ranging, somewhat variable species is involved.</p>Published as part of <i>Curini-Galletti, Marco, Delogu, Valentina, Campus, Paolo & Casu, Marco, 2007, New species of the genus Archimonocelis Meixner, 1938 (Proseriata, Archimonocelididae) from southern Apulia (Italy), pp. 47-58 in Zootaxa 1557</i> on page 57, DOI: <a href="http://zenodo.org/record/178278">10.5281/zenodo.178278</a>
Archimonocelis scopulicola Curini-Galletti, Delogu, Campus & Casu, 2007, sp. n.
No full textArchimonocelis scopulicola sp. n. (Figs. 1, 2 C, 3 A–C) Holotype: one whole mount (SMNH 6780). Type locality: Apulia, Italy: Porto Cesareo (Lecce), Torre Scianuli (lat. 40 ° 14 ’ 3.72 ”N, long. 17 ° 54 ’ 35.77 ”E), about 7 m deep in pockets of sediments (mostly shell fragments) on a limestone cliff, May 2005. Paratype. a specimen from the type locality, whole mount (rear portion) (ZMC- 59); frontal half processed for karyology. Etymology. the specific epithet refers to the habitat where the species was found (lat. scopulus = rocky cliff, and colere = to dwell). Description. Comparatively small for the genus: the holotype, a fixed, contracted whole mount, is 3.7 mm long. Colourless and without pigmented eye-spots. With thin, cross shaped, calcareous spiculae, similar to those described for A. crucifera Martens & Curini-Galletti, 1993, spread all over the body, and particularly evident in the cephalic region. Cnidosacs, containing numerous cnidocysts are well visible in living material, and arranged in a single median dorsal row. Cnidocysts consist of heteronemes of three different types: ovoid, around 5 µm in length; elongate, around 10 µm; and a few, very large and elongate cysts, about 30 µm long. Pharynx submedian, elongate, provided with numerous glandular cells (Fig. 1). Male genital system. Around ten testes arranged in one median line, from the ovaries to in front of the pharynx. The copulatory organ consists of one pair of seminal vesicles, a small bulb with the prostate vesicle (vesicula granulorum), and a stylet surrounded by 18 copulatory spines. The tubular stylet, 51 µm long in the holotype (Fig. 2 C, 3 B), and 50 µm in the paratype (Fig. 3 A), is straight and about 5 µm broad, with a slightly inflated proximal opening (8 µm in diameter), and an acuminate distal tip, provided with a very large and oblique distal opening, about 18 µm wide. The copulatory spines are arranged into a single girdle. Spines close to the stylet are 30–32 µm long and 1–1.5 µm broad, provided with a slightly falcate apex, and a small subterminal tooth. Away from the stylet, spines become progressively longer (up to 35 µm) and broader (up to 2 µm), with a distinctly falcate apex, and a more marked subterminal tooth (fig. 2 C). Female genital system. Limited observations could be performed on the living specimens. With two comparatively large ovaries, lying in front of the vitellaria, in the first third of the body. Vitellaria arranged in two lateral rows, from the ovaries to in front of the copulatory bulb. Most vitellaria are prepharyngeal, only 5 follicles per side are post-pharyngeal. Just posterior to the fusion of the oviducts, the female duct widens to form a small bursa. A vagina could not be detected on living specimens. The female pore opens posterior to the male pore; a genito-intestinal duct is present. Karyotype. Chromosome number: n = 10 (Fig. 3 C); FN = 16. Chromosomes can be arranged in a regularly decreasing series: Chrom. I = r.l.: 13.95 + 0.28; c.i.: 30.91 + 4.91 (sm); Chrom. II = r.l.: 13.65 + 0.24; c.i.: 22.47 + 4.66 (st); Chrom. III = r.l.: 12.21 + 0.53; c.i.: 27.77 + 4.23 (sm); Chrom. IV = r.l.: 10.46 + 0.28; c.i.: 41.76 + 2.20 (m); Chrom. V = r.l.: 10.34 + 0.34; c.i.: 26.63 + 6.33 (sm); Chrom. VI = r.l.: 9.72 + 0.22; c.i.: 34.41 + 2.20 (sm); Chrom. VII = r.l.: 8.84 + 0.84; c.i.: 12.53 + 3.49 (st); Chrom. VIII = r.l.: 8.84 + 0.84; c.i.: 34.73 + 3.82 (sm); Chrom. IX = r.l.: 7.39 + 0.55; c.i.: 13.52 + 4.12 (st); Chrom. X = r.l.: 6.20 + 0.01; c.i.: 15.56 + 5.10 (st) (based on the measurements of two spermatogonial plates). Diagnosis. Archimonocelis species with two seminal vesicles. With a straight, tubular stylet, about 50 µm long, with a straight, slightly inflated proximal aperture and an acuminate distal tip, provided with a large, oblique, distal opening. With a girdle of 18 copulatory spines 30–35 µm long, 1–2 µm broad, shorter and narrower proximal to the stylet, and provided with a falcate apical tip and a subterminal tooth, more marked in the spines away from the stylet. With n= 10. Remarks. Archimonocelis scopulicola n. sp. belongs to the group of species lacking accessory spines. Most species of this group are provided with two first order copulatory spines, distinctly larger and broader than the rest of the spines (see, i.a., A. crucifera Martens & Curini-Galletti, 1993). Besides the new species, in eight Archimonocelis species the first order spines are absent, and copulatory spines differ slightly in size and morphology. Among these, A. bathycola (Westblad, 1952) and A. carmelitana Martens & Curini-Galletti, 1993 have many more (around 100) copulatory spines than the new species, while A. hasanuddin Martens & Curini-Galletti, 1989 and A. helfrichi Karling, Mack-Fira & Dšrjes, 1972 possess four spines only (Martens & Curini-Galletti, 1993). A. koinocystis Karling, 1966, from the coast of western Norway (Karling, 1966 a), has one seminal vesicle only, and its copulatory spines present distinctly falcate distal tips, proportionally much longer than in the new species (about one third of the length of the whole spines), with a much more marked and elongate basal tooth. A. rhizophoralis Martens & Curini-Galletti, 1989, from northern Australia has 12 copulatory spines, arranged in two groups: six are needle-like, without subterminal tooth, and six are falcate, with a subterminal tooth (Martens & Curini-Galletti, 1989). The stylet (65 µm long), and the spines (45–53 µm) are slightly longer than in the new species. The chromosome number is n= 5 (Martens & Curini-Galletti, 1993). A. mediterranea Meixner, 1938, from western Mediterranean, has a stylet similar in size and morphology to the new species. Copulatory spines are fewer, arranged in two concentric rings: six larger spines (about 36 µm long) form the outer girdle, and six smaller spines (about 30 µm) form the inner girdle; in addition, two spines, about 45 µm long, lie close to the stylet. The chromosome number is n= 12, with a distinctly larger metacentric pair (Martens & Curini-Galletti, 1993), absent in the new species. A. monicae Martens & Curini-Galletti, 1993, from northern Red Sea, has a slightly larger stylet (up to 65 µm long), and fewer (11–16) and longer (45–60 µm) copulatory spines. Furthermore, it lacks a bursa. A. monicae is a very large Archimonocelis: living specimens can reach, in extension, up to 20 mm in length. The chromosome number is n= 7, with two large metacentric pairs (Martens & Curini-Galletti, 1993).Published as part of Curini-Galletti, Marco, Delogu, Valentina, Campus, Paolo & Casu, Marco, 2007, New species of the genus Archimonocelis Meixner, 1938 (Proseriata, Archimonocelididae) from southern Apulia (Italy), pp. 47-58 in Zootaxa 1557 on pages 48-51, DOI: 10.5281/zenodo.17827
Bibliografia statutaria generale (2006-2015)
No full textLa pubblicazione del terzo volume della Bibliografia statutaria italiana prosegue un lungo periodo di collaborazione tra la Biblioteca del Senato della Repubblica e il Comitato italiano per gli studi e le edizioni delle fonti normative dell'Università di Bologna, iniziato nel 1998 e scandito con regolarità decennale dall'uscita degli aggiornamenti bibliografici relativi agli anni 1986-1995 e 1996-2005. L'importanza di un lavoro di raccolta bibliografica nel settore statutario risulta evidente se si considera la varietà dei soggetti produttori (università, istituti culturali, enti locali, deputazioni di storia patria, biblioteche, accademie) e della tipologia dei materiali (monografie, articoli editi in riviste, atti di convegni, tesi di laurea o di dottorato).
il repertorio è strutturato per territori regionali secondo i confini attuali. Nella definizione dell'ambito territoriale da prendere in considerazione si è ritenuto comunque utile adottare un criterio largo e comprensivo, inserendo tanto regioni appartenenti al territorio nazionale la cui produzione normativa ha per ragioni storiche e culturali peculiari caratteristiche (come l'Alto Adige-Sudtirolo), quanto regioni storiche poste al di fuori del territorio nazionale (la Svizzera italiana, l'Istria e la Dalmazia)
- …
