1,720,961 research outputs found
Applicazione del protocollo P:R:U:O: nel Policlinico Universitario a Gestione Diretta di Udine
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Analisi preliminare per l'esternalizzazione del servizio di trasporti interni presso un ospedale ad alta specializzazione
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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
Implementazione di un programma di sorveglianza sulle infezioni ospedaliere di origine fungina in un ospedale ad alta specializzazione
No full textAutovalutazione preliminare di un manuale per l'accreditamento all'eccellenza dei servizi vaccinali realizzato in Friuli Venezia Giulia
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Ultramafic xenoliths from Damaping (Hannuoba region, NE-China): petrogenetic implications from crystal chemistry of pyroxenes, olivine and Cr-spinel and trace element content of clinopyroxene
No full textOlivine, orthopyroxene, clinopyroxene and spinel from 16 different lherzolite mantle xenoliths from Damaping
(Hannuoba region, NE-China) have been analyzed by X-ray single crystal diffraction and electron microprobe to define their structure, chemistry and cation distribution. LA-ICP-MS analysis has been carried out on clinopyroxenes to determine their LILE (Large-Ion Lithophile Elements), HFSE (High Field Strength Elements) and REE (Rare Earth Elements) contents. These latter define Depleted, Enriched, U-shaped and Transitional CInormalized patterns suggesting that the xenolith suite here studied experienced at least two metasomatic events related to the porous flow percolation of melts with tholeiitic and alkaline affinity, respectively. The cation distribution of the mineral phases allowed determination of their intra- and inter-crystalline temperatures of equilibration. The closure temperature of intra-crystalline reactions for the constituent phases is in the range 600–800 °C, suggesting a relatively slow cooling rate, while the inter-crystalline temperature interval found out is in the range 866–1048 °C. The pressure conditions estimated for Hannuoba xenoliths through structural considerations correspond to a depth of about 50–60km, consistent with the Moho depth beneath the Hannuoba area,which is estimated at about 42km. The pressures of equilibration, as estimated from the cell and T site volumes of the clinopyroxenes, have been compared with the trace element and REE signatures; they demonstrate that Enriched, Depleted, U-shaped and Transitional clinopyroxenes formed at different pressures and are not restricted to a specific region of the mantle, testifying that the metasomatism took place at different depths in the mantle
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