1,721,010 research outputs found
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
“La tonometria nel danno ischemia- riperfusione in cani sottoposti ad autotrapianto di intestino tenue”.
No full text“Does manometry predict anorectal function (ARF) in children treated for imperforate anus (IA)?”
No full textAbstrac
Scintigraphy in assessment of the feasibility of separation of a set of xipho-omphalopagous conjoined twins
No full text
Experimental analysis of viscoelastic criteria for crack initiation and growth in polymers
No full textDifferent viscoelastic theories have been applied to characterize the resistance to crack initiation and propagation in the fracture of two poly-diethyleneglicol-bis-allyl-carbonate grades that have different crosslinking densities. Tensile creep compliance curves have been obtained on unnotched specimens, and fracture tests have been conducted on single edge notched specimens loaded in tension at different temperatures and displacement rates. A theory developed by Schapery for linearly viscoelastic materials has been found to be fairly adequate to describe the experimental results obtained, provided that the hypothesis of the yield stress being constant with time is removed. The time-temperature equivalence has also been found to satisfactorily account for the temperature dependence of the fracture resistance at initiation; however, the same did not hold as good for propagation. A simple scheme to analyse fracture data obtained from viscoelastic materials is also proposed
- …
