1,721,003 research outputs found
Sistema multisensore elettroottico per processi produttivi automatizzati: un progetto europeo
No full textEffect of the temporal integration on the accuracy of the measured concentration in LIBS measurements
Full text linkWe have developed a simulation program that allows to calculate the plasma emission spectrum of a coal sample in a LIBS experiment. We used the acquired data to evaluate the effect of temporal integration on the accuracy of measured concentration obtained using the calibration free method
LIBS Collection Optics : comparative analysis of different mirror-based configuration
Full text linkWe have evaluated the efficiency of different reflection based optical systems using numerical simulation. We have realized and started testing the most promising one
Low angle elastic light scattering study of diffusion limited aggregation
No full textWe have investigated the kinetics of the diffusion-limited aggregation of colloidal silica with low-angle elastic light scattering at 31 scattering angles covering the wave vector range 3.7 ƃ 102 cm-1 <q<3.3 ƃ 104 cm-1. We have studied both the asymptotic behaviour at larger q, which provides a measure of the clusters fractal dimension, as well as the roll-off region at small q, which gives information on the clusters size. Each set of data (scattered intensity vs. q vectors) has been analysed by means of a nonlinear iterative inversion scheme to provide the value of the number average gyration radius ⟨R⟩n which is found to grow in time with a power law tα. The exponent (average over a few runs) is α = 0.58 ± 0.02, consistent with the theoretical expectations. © 1988 IOP Publishing Ltd
Sistema di asservimento per la stabilizzazione angolare di un fascio laser utilizzazto per la misura del trascinato liquido emesso dalle torri di raffreddamento delle centrali geotermiche
No full textValidazione della tecnica LIBS per l’analisi della composizione di carbone in pezzi edefinizione dei requisiti di un prototipo per misure su impianto
No full textIl documento descrive l’attività relativa allo sviluppo di un sistema LIBS (Laser Induced
Breakdown Spectroscopy) da utilizzare per l’analisi in linea della composizione chimica del
carbone in ingresso ai mulini di macinazione nelle centrali termoelettriche alimentate a
carbone
Test di uno strumento per la caratterizzazione del trascinato liquido emesso dalle torri di raffreddamento delle centrali geotermiche
No full textCaratterizzazione di un nuovo strumento per misure di particolato sospeso in aria tramite misure di estinzione luminosa su lunghi percorsi
No full text
Going 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
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