1,721,196 research outputs found
Un caso di cittadinanza privilegiata in epoca romana imperiale: ALìlessandro di Afrodisia
Full text linkSi tratta di inquadrare nel suo contesto problematico un caso di studio emerso all’inizio del nuovo millennio (Chaniotis 2004): la cittadinanza romana di Alessandro di Afrodisia. In questa occasione, vorrei anche so toporre alla discussione ed esplicitare una mia precisa proposta di lettura delle relazioni con Roma del filosofo aristotelico Alessandro di Afrodisia: tali relazioni infatti, pur già note da un indizio interno all’opera dell’autore (cfr. Alex. De fato, 164, 3- 165, 13 Bruns, cfr. qui infra) emergono comprovate e rinforzate dai dati archeologici, ma sono sfuggite finora alle ricostruzioni di insieme
Continuous Multipoint Online Temperature Measurement in PM Motors
No full textHigher demands on the modern variable speed drives, push the operating conditions always on the edge, where more accurate information about various motor point temperatures are required. With the use of a multi-point continuous motor temperature measurement and a controller embedded motor thermal model, the actual temperature in various hard to access points of the machine can be estimated with reasonable accuracy. Intending to minimise wiring, the existing two wire over temperature switch connection between motor and drive is used as a physical layer for MicroLAN and over this lines, temperature sensors power supply and data are transmitted
Traditional hydropower plant revamping based on a variable-speed surface permanent-magnet generator
No full textExtending the speed-range of surface permanent-magnet axial-flux motors by flux-weakening characteristic modification
No full textGoing Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe 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
An analytical-numeric method for stator end-coil leakage inductance computation in multi-phase electric machines
No full textVisible 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
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