87,545 research outputs found
Dotto arterioso pervio
No full textIl dotto arterioso o dotto di Botallo pervio rappresenta la terza forma più comune di cardiopatia congenita isolata (5-10% di tutte le cardiopatie congenite) con un’incidenza variabile di 1:2000-5000 nati viv
Visible spectroscopic and photometric survey of Jupiter Trojans: Final results on dynamical families
No full textWe present the results of a visible spectroscopic and photometric survey of Jupiter Trojans belonging to different dynamical families. The survey was carried out at the 3.5 m New Technology Telescope (NTT) of the European Southern Observatory (La Silla, Chile) in April 2003, May 2004 and January 2005. We obtained data on 47 objects, 23 belonging to the L5 swarm and 24 to the L4 one. These data together with those already published by Fornasier et al. [Fornasier, S., Dotto, E., Marzari, F., Barucci, M.A., Boehnhardt, H., Hainaut, O., de Bergh, C., 2004a. Icarus 172, 221 232] and Dotto et al. [Dotto, E., Fornasier, S., Barucci, M.A., Licandro, J., Boehnhardt, H., Hainaut, O., Marzari, F., de Bergh, C., De Luise, F., 2006. Icarus 183, 420 434], acquired since November 2002, constitute a total sample of visible spectra for 80 objects. The survey allows us to investigate six families (Aneas, Anchises, Misenus, Phereclos, Sarpedon, Panthoos) in the L5 cloud and four L4 families (Eurybates, Menelaus, 1986 WD and 1986 TS6). The sample that we measured is dominated by D-type asteroids, with the exception of the Eurybates family in the L4 swarm, where there is a dominance of C- and P-type asteroids. All the spectra that we obtained are featureless with the exception of some Eurybates members, where a drop-off of the reflectance is detected shortward of 5200 Å. Similar features are seen in main belt C-type asteroids and commonly attributed to the intervalence charge transfer transition in oxidized iron. Our sample comprises fainter and smaller Trojans as compared to the literature's data and allows us to investigate the properties of objects with estimated diameter smaller than 40 50 km. The analysis of the spectral slopes and colors versus the estimated diameters shows that the blue and red objects have indistinguishable size distribution, so any relationship between size and spectral slopes has been found. To fully investigate the Trojans population, we include in our analysis 62 spectra of Trojans available in literature, resulting in a total sample of 142 objects. Although the mean spectral behavior of L4 and L5 Trojans is indistinguishable within the uncertainties, we find that the L4 population is more heterogeneous and that it has a higher abundance of bluish objects as compared to the L5 swarm. Finally, we perform a statistical investigation of the Trojans's spectra property distributions as a function of their orbital and physical parameters, and in comparison with other classes of minor bodies in the outer Solar System. Trojans at lower inclination appear significantly bluer than those at higher inclination, but this effect is strongly driven by the Eurybates family. The mean colors of the Trojans are similar to those of short period comets and neutral Centaurs, but their color distributions are different
A correction to make Chao estimator conservative when the number of sampling occasions is finite
No full textChao estimator is not guaranteed to be asymptotically conservative with finite sampling efforts. A simple correction solves the issue. We illustrate with simulations and examples that the corrected Chao estimator is asymptotically conservative, and has lower standard error
Cronache dall’industria. Mappatura e funzioni della trade press italiana (1949-1976)
No full textPublications written by and/or for professionals in the film industry have a complex relationship
with film history. Long used simply as a source for historical research, they have only recently
begun to be studied as a phenomenon in their own right. In the Italian context, however, a
comprehensive study of these materials is lacking: the present contribution aims to fill this gap
by mapping out the trade journals in Italy from the 1940s to the 1970s and by investigating
their functions. The basic assumption is that these publications, far from being mere infor mation sheets, were an essential part of a film industry characterised by a strong relational
dimension, in which financial and production practices were defined by the interaction of a
complex group of stakeholders
La chiesa di Nostra Signora di Lourdes a Zagabria di Jože Plečnik. Analisi Grafica
No full textJože Plečnik (Ljubljana, 23rd January 1872 - Ljubljana, 7th January 1957) was, without any doubt, Otto Wagner's most brilliant pupil. During his tireless activity as an architect, he manages to touch a variety of absolutely heterogeneous themes, masterfully reworking the consolidated syntax of traditional architecture.
In this survey we consider a relevant – although little investigated – aspect of the architect's work, that is the one linked to the typological innovations brought about by his work.
In the case under examination – the work never done by the church of Our Lady of Lourdes in Zagreb – this innovation consists of the unusual arrangement of the four rows of columns that separate the naves of the church, almost as if they are arranged in a casual manner.
The first phase of this work deals with the graphical analysis of the plant. It has shown that the unusual design choice is, in truth, a functional-typological expedient linked to purely visual necessities. The theory has been corroborated through the digital reconstruction of the building and the perspective restitution of the interior spaces.
A graphic comparison with other Plečnik buildings – in the second part of the contribution – frames the case of Our Lady of Lourdes within the much broader experimentation pursued with constancy by the architect. On the one hand, especially in ecclesiastical buildings, the preference for types of unitary internal spaces makes its appearence again; on the other hand there is a mastery of drawing in perspective that often becomes – as in the case studied – pure design tool. A constant research that culminates, in the most known and mature projects like the parliament of Ljubljana, with the construction of real "accelerated" perspective devices.
In conclusion, Plečnik's work significantly summarizes the symbiotic bond – extremely alive – between design and project
Svuotamento centrale del collo nel trattamento delle cisti del dotto tireoglosso
No full textIntroduzione: Le cisti mediane del collo rappresentano una patologia disembriogenetica derivante dalla persistenza di residui del dotto tireoglosso , che nella vita fetale collega la ghiandola tiroide con il forame cieco della base linguale. Tale anomalia è presente in circa il 40% dei bambini ma si manifesta clinicamente solo in una piccola percentuale , generalmente nelle prime due decadi di vita. La tumefazione mediana del collo , le infezioni a cui è soggetta la cisti e la sua fistolizzazione cutanea rappresentano i segni principali di tale patologia che può in tal caso essere suscettibile di rimozione chirurgica. La tecnica attualmente più utilizzata per l’asportazione delle cisti del dotto tireoglosso è la tecnica di Sistrunk che , basandosi sul decorso del dotto stesso , prevede l’escissione della cisti insieme ad una porzione centrale dell’osso ioide ed un cuneo di tessuto della base lingua che include il forame cieco. Con tale tecnica la percentuale di recidiva si è ridotta al 3-5%. Diversi studi hanno dimostrato che questa tendenza a recidivare è giustificabile con il rilievo di diramazioni del dotto al di sopra e al di sotto dell’osso ioide. Per tal motivo Isaacson ha proposto nel 2001 una tecnica di svuotamento centrale del collo in cui , dopo l’elevazione di un lembo cutaneo, attraverso un attenta dissezione dei tessuti molli e delle strutture muscolari della loggia mediana del collo, estesa dalla cartilagine cricoide fino alla base lingua, veniva ad essere asportato tutto il tessuto potenzialmente contenente i residui del dotto tireoglosso e le sue diramazioni. Tale tecnica, per attestazione del suo stesso autore, è indicata nei casi di cisti o fistole mediane del collo recidivanti o complicate da un infezione recente o ricorrente.
Materiale e metodo: Sono stati trattati con tecnica di svuotamento centrale del collo 6 casi di cisti del dotto tireoglosso (2 Maschi, 4 femmine; eta’ media 6,8; range 3-14 anni) presso l’ U.O. di Chirurgia Pediatrica Universitaria degli Ospedali Riuniti di Foggia. Tali cisti si presentavano in 3 casi in forma primaria (con fistola mediana suppurata in un caso e con storia di flogosi recidivanti negli altri due) . I restanti 3 casi erano invece recidive di cisti mediane già trattate con tecnica di Sistrunk. La diagnosi clinica di questi casi era stata avvalorata dall’esame ecografico.
Risultati: Nessuna complicanza intraoperatoria è stata rilevata. Il controllo ecografico ad un anno non ha messo in evidenza segni di recidiva della patologia. Al controllo clinico inoltre non si sono notate alterazioni nella fonazione o nella deglutizione, né alterazioni estetiche cervicali.
Conclusione: La tecnica di svuotamento centrale del collo consente di ottenere ottimi risultati nei casi di cisti del dotto tireoglosso recidivanti o gravate da flogosi recenti o ricorrenti. Il suo utilizzo nei casi primari per cisti non complicate tuttavia non è giustificata dalle basse percentuali di recidiva della tecnica di Sistrunk e dalla possibile morbidità della resezione di strutture muscolari della loggia mediana del collo, nonché dal rischio di ledere strutture nobili situate nelle strette vicinanze (carotide interna e nervo vago
The power of (extended) monitoring in robust clustering
No full textWe complement the work of Cerioli, Riani, Atkinson and Corbellini
by discussing monitoring in the context of robust clustering. This implies extending the approach to clustering, and possibly monitoring more than one
parameter simultaneously. The cases of trimming and snipping are discussed
separately, and special attention is given to recently proposed methods like
double clustering, reweighting in robust clustering, and fuzzy regression clustering
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