1,357,308 research outputs found
Carta de Krishna Murari Garg a Ferran Sunyer
No full textCarta de Krishna Murari Garg, per agrair-li l'enviament dels articles demanats i d'altres que no havia demanat. Li promet que li trametrà els "reprints"del seu treball
Carta de Krishna Murari Garg a Ferran Sunyer
No full textCarta escrita per Krishna Murari Garg, investigador de funcions reals, on demana a F. Sunyer dos dels seus treballs: 1. "Sur la détermination d'une fonction par ses nombres dérivées" 2. "On the determination of a function by its derived numbers"
Dati statistici storici, politici e militari sulle colonie degli Stati europei e degli Stati Uniti d'America / Vittorio Murari
No full textDati statistici storici, politici e militari sulle colonie degli Stati europei e degli Stati Uniti d'America / Vittorio Murari Brà ; con carta dimostrativa disegnata dal tenente Pietro Umberto Antona
Torino : Roux e Viarengo, [1900]
75 p., [1] c. geogr. ripieg. ; 31 cm
Tipi murari
No full textLo studio delle chiese con cupole in asse in Terra di Bari ha permesso di offrire un contributo alla conoscenza delle tecniche costruttive adottate tradizionalmente nella realizzazione degli apparecchi murari. Le chiese con cupole in asse hanno generalmente mantenuto inalterato il loro aspetto originario - nonostante alcune di esse siano state soggette a limitati rimaneggiamenti, parziali demolizioni ed integrazioni - divenendo un esempio tangibile dell'antico modus costruendo pugliese. L'osservazione ed il rilievo contestuale della sezione e dei paramenti murari degli edifici degradati hanno avuto un ruolo determinante nell'indagine della tecnica costruttiva, rivelando preziose informazioni sulle dimensioni degli elementi lapidei, sull'assemblaggio dei paramenti e sulla composizione del nucleo. L'osservazione diretta dei brani murari individuati ha permesso una prima selezione di quegli apparecchi murari che meglio esprimono l'identità della cultura costruttiva locale. La distinzione in tipologie murarie tiene conto del materiale impiegato, e discende da una serie di considerazioni fatte sulla lavorazione degli elementi, sulla tecnica di posa e sul funzionamento strutturale della muratura. Sono stati così riconosciuti, nel panorama regionale, apparecchi murari in bozze, apparecchi murari in blocchi e apparecchi murari in conci
Total radiation losses and emissivity profiles in RFX
No full textIn the framework of adding new information to the reversed field pinch (RFP) confinement database, the radiation emitted by RFX plasmas has been investigated using an eight chord bolometric camera, whose detectors have been calibrated absolutely. From the experimental data the emissivity profiles have been reconstructed by means of a generalized tomography reconstruction algorithm. This analysis confirms that the radiation emitted in RFX is systematically concentrated at the edge. The dependence of the emitted power on the plasma density shows that the radiation increases approaching the high density regime, but it rarely goes beyond 30% of the input power for stationary discharges. This behaviour is strongly dependent on the concentration of impurities but, in any case, in RFX there is no evidence of disruptions. A simple local energy balance allows a preliminary evaluation of the radial heat flux profile to be obtained. These measurements indicate that an active impurity screening mechanism is acting in the edge and that transport is the major energy loss mechanism in RFX
Development and tests of a simple multifoil spectrometer for highly time-resolved line intensity measurements in the RFX experiment
No full textA simple and cost-effective spectrometer dedicated to line-intensity monitoring in the soft X-ray range has been realized, installed and tested in the RFX reversed field pinch experiment for the study of magnetically confined fusion plasmas. The technique of photon energy selection by means of multilayer material filters has been applied to the instrument described here, which, together with the associated electronics, has been designed in an original compact version for RFX. This present version allows on-line monitoring with good time resolution (10 kHz bandwidth) of line emission from carbon and oxygen in their H- and He-line states (which fall within the soft X-ray energy range), but, with modifications of the set of material filters, different wavelength ranges can be chosen and then other lines can be monitored. A detailed description of the instrument is given here and the data analysis technique is presented. Particular attention is dedicated to a critical analysis of the technique and to the discussion of the experimental errors which may be associated with this measurement; new results on the estimate of systematic errors and experimental improvements to eliminate the problem of continuum radiation are presented. As a demonstration of the proper operation of the instrument, data taken under a wide range of conditions in 0.5-0.6 MA RFX plasmas are shown and discussed. Good agreement of the measurements with other spectroscopic diagnostics already operating on the machine is found; by exploiting the high time resolution of the instrument, interesting results concerning the RFP configuration`s dynamics are obtained. Based on this prototype, a multichord diagnostic has been designed for imaging the impurity emission radial profiles
Expert control theory: a key for solving production planning and control problems in flexible manufacturing.
No full textAs décadas do silêncio: a representação dos imigrantes no Brasil entre as duas guerras mundiais
No full textA New Approach to Bolometric Tomography in Tokamaks
No full textBolometry provides absolute measurements of total radiation losses of a plasma discharge and it is an essential instrument for the studies related to the understanding of the plasma behavior at different radiative fractions. In this paper we present the first results related to the implementation of a new reconstruction method for bolometry. The method is based on the maximum likelihood statistical principle. It allows the implementation of a methodology for the evaluation of the uncertainties accompanying the reconstruction and the calculated radiated power. The method has been tested using numerically simulated distributions and also on relevant experimental JET data
Causality detection methods applied to the investigation of malaria epidemics
No full textMalaria, a disease with major health and socio-economic impacts, is driven by multiple factors, including a complex interaction with various climatic variables. In this paper, five methods developed for inferring causal relations between dynamic processes based on the information encapsulated in time series are applied on cases previously studied in literature by means of statistical methods. The causality detection techniques investigated in the paper are: a version of the kernel Granger causality, transfer entropy, recurrence plot, causal decomposition and complex networks. The methods provide coherent results giving a quite good confidence in the conclusions
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