1,720,989 research outputs found
Fissazione rigida nella chirurgia delle seconde classi: valutazione estetica e funzionale. A. Cortese, G. Lavorgna, D. Burraccione, L. Cione, M. Saturno, G. Savastano XII Congresso Nazionale SICMF Napoli 6-8 giugno 2001. 301-2
No full textLa recidiva cancerizzata dell'adenoma pleomorfo della parotide Considerazioni da un caso
No full textSome aspects of non frequent Maxillo-Facial pathology in children. Clinical and Surgical Considerations.
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Analisi non lineare FEM e BEM di una mandibola umana in presenza del disco articolare
No full textSALERN
On the Molecular Mechanism of H2O Diffusion into Polyimides: A Vibrational Spectroscopy Investigation
No full textThe diffusion of water into polyimide films was studied by in situ FTIR spectroscopy using several methods of spectral data anal., namely, difference spectroscopy, least-squares curve fitting, 2D correlation spectroscopy, and normal coordinate anal. The results gave an insight into the mol. mechanism of diffusion in terms of no. and population of penetrant species present in the system and with respect to the nature of the mol. aggregates. In particular, two water species were identified and quantified, i.e., H2O mols. interacting with the carbonyl groups of the polyimide and self-assocd. water. An enthalpy of formation of -0.9 kcal mol-1 was estd. for the H2O-polyimide interaction, which points to a relatively weak H-bonding tendency of the imide carbonyls. Finally, the IR spectrum of the H2O-imide aggregate was calcd. by a quantum mechanic (QM) model chem. to rationalize the effects obsd. in the spectrum of the water satd. films. The results of the computation were in good agreement with the expt., confirming the predictive capabilities of the chosen QM method and supporting the proposed mol. structure of the H-bonding aggregate
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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