1,723,406 research outputs found
The Time is Out of Joint ovvero come è stata riallestita la Galleria Nazionale nel tempo del senza tempo.
No full textNella complessa trama del tempo presente s’inscrive il lavoro di riallestimento della collezione della
Galleria Nazionale d’Arte Moderna e Contemporanea di Roma operato dalla direttrice Cristiana Collu.
The time is out of joint - questo lo shakespeariano titolo del progetto - è l’abbandono definitivo di
qualsiasi linearità storica, per una rilettura delle collezioni che dispiega su un piano cronologico
orizzontale le opere come sedimenti della lunga vita del museo. Il saggio riflette sui nodi centrali di
quest’itinerario, segnalando le tappe che l’hanno scandito – come l’esposizione temporanea The
Lasting. L’intervallo e la durata prologo alla riscrittura della collezione -, evidenziando la discontinuità
con i precedenti allestimenti della galleria e leggendo l’operazione nella traiettoria di trasformazione che
investe le pratiche espositive dei musei
High Speed Marine Vehicles With Aerodynamic Surfaces: Development of a Dynamic Model for a Novel Configuration.
No full textA research programme on high speed marine vehicles fitted with aerodynamic
surfaces started in Cranfield University in 2005. One of the configurations
analyzed is a high speed prismatic planing hull with one or more aerodynamic
surfaces; it is called a hybrid vehicle (HV). Two mathematical models have been
developed for the dynamic behavior which is a combination of the very different
behaviors of aircraft and ships. The first model estimates the equilibrium
attitude of the HV at a certain speed. A parametric analysis for the influence
of the configuration on the performance of the HV has been conducted (1). With
the second model, the authors propose a set of ordinary differential equations
of motion, derived in the frame of small-disturbance stability theory which has
been used to investigate the longitudinal dynamic stability of the HV (2). Ref.
(1) and (2) present a complete description of the mathematical models, while
this article summarizes the methodology adopted to develop these dynamic models
and gives a brief summary of the results. (1) COLLU, M., PATEL, M. H., TRARIEUX,
F., A Mathematical Model to analyze the Static Stability of Hybrid (Aero-
hydrodynamically supported) vehicles., 8th Symposium on High Speed Marine
Vehicles 2008 (HSMV08), Naples, Italy, 2008. (2) COLLU, M., PATEL, M. H.,
TRARIEUX, F., A Unified Mathematical Model for High Speed Hybrid (Air and Water-
borne) Vehicles., 2nd International Conference on Marine Research and
Transportation, 2007
Terras de Collu
No full textThe stratigraphic and systematic position of two perrisodactyl remains, ?Paralophiodon sardus and Atalonodon monterinii, collected in Early Eocene deposits in Terras de Collu (south-western Sardinia) is discussed
Functional Rotation of the Transporter AcrB: The Essentials of Peristaltic Motion and Subsequent Substrate Extrusion
No full textBacteria, such as E. coli, use multidrug efflux pumps to export toxic substrates through their cell membranes, including antibiotics. The RND transporter of the AcrAB-TolC efflux pump is able to export structurally and chemically different substrates via a functional rotation. The three major states of this rotation cycle were found in several asymmetric crystal structures. After initially analyzing the basic mechanisms of opening of the TolC channel [1] and of substrate extrusion by AcrB [2] separately, we have continued the analysis of the latter one. Thereby, we have focused both on the local interactions between substrate and protein, the properties of the extrusion pathway, as well as the principal subdomain movements which lead to the peristaltic motion. Furthermore, we have investigated the possibility to pull the substrate from the final state of the previous simulations out of the exit gate to estimate whether the substrate is already free to leave the protein via diffusion, which is usually beyond the time scale of computer simulations.
[1] R. Schulz, U. Kleinekathöfer, Biophys. J. 96, 3116 (2009)
[2] R. Schulz, A. Vargiu, F. Collu, U. Kleinekathöfer, P. Ruggerone, submitte
Bioprotection of food by lactobacillus and their products, against unwanted molds and bacteria
No full text
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
Variations on the Author
No full text“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
Appropriate Similarity Measures for Author Cocitation Analysis
No full textWe 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
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