67,204 research outputs found
The basilica of the eastern harbor of Hephaestia (Lemnos). Preliminary research report in 2019|La basilica del porto orientale di efestia (Lemno). Relazione preliminare delle ricerche del 2019
No full textThe IASA archaeological expedition continued to investigate the basilica complex located on the Eastern harbor of Hephaestia, Lemnos. Investigations resumed in 2018, ninety-two years after the discovery of the site. During the 2019 excavation season, the structures of the Early Byzantine basilica were completely brought to light, as well as an associated room located north of the narthex. The stratigraphic excavations of the central nave of the Early Byzantine basilica revealed the overlying single nave of the Middle Byzantine church, cruciform in plan. Moreover, excavations below the apse revealed two structures that date to the Archaic-Classic and Hellenistic phases of occupation of this site. This paper presents the preliminary results of the 2019 excavation season and the related study of the finds. © 2019, Scuola Archeologica Italiana di Atene. All rights reserved
The basilica of the eastern harbor of Hephaestia (Lemnos). Preliminary research report in 2019|La basilica del porto orientale di efestia (Lemno). Relazione preliminare delle ricerche del 2019
No full textLa basilica del porto orientale di Efestia (Lemno). Relazione preliminare delle ricerche 2019
No full textLa missione archeologica della SAIA a Lemno ha proseguito le indagini presso la basilica del porto orientale di Efestia, riprese nel 2018 a novantadue anni dalla scoperta. Sono state messe in luce per intero le strutture della fase proto-bizantina ed è stato individuato un ambiente annesso a N del nartece. Lo scavo stratigrafico della navata centrale ha consentito di rintracciare le strutture di una navata singola, pertinente alla chiesa cruciforme, realizzata in età medio-bizantina sulle spoglie della basilica. Nell'area dell'abside, alcuni sondaggi in profondità hanno permesso di individuare due strutture relative alle fasi di occupazione dell'area portuale in età arcaico-classica ed ellenistica. Si presentano in questa sede i risultati preliminari della campagna di scavo e di studio dei materiali del 2019.The IASA archaeological expedition continued to investigate the basilica complex located on the Eastern harbour of Hephaestia, Lemnos. Investigations resumed in 2018, ninety-two years after the discovery of the site. During the 2019 excavation season, the structures of the Early Byzantine basilica were completely brought to light, as well as an associated room located north of the narthex. The stratigraphic excavations of the central nave of the Early Byzantine basilica revealed the overlying single nave of the Middle Byzantine church, cruciform in plan. Moreover, excavations below the apse revealed two structures that date to the Archaic-Classic and Hellenistic phases of occupation of this site. This paper presents the preliminary results of the 2019 excavation season and the related study of the finds
Morphological changes in a hyperfunctioning thyroid adenoma after percutaneous ethanol injection: Histological, enzymatic and sub-microscopical alterations
No full textUltrasound-guided ethanol injection (PEI) is an effective treatment of autonomously functioning thyroid nodules (AFTN) but little is known about the tissue lesions induced by alcohol. We report morphological changes of an AFTN which was removed after successful PEI treatment. At histological evaluation, the adenoma showed multiple areas of coagulative necrosis with eosinophilic ghost follicles, hemorrhages, small Vessel thrombosis and a wedge-shaped hemorrhagic infarction. The peripheral adenomatous tissue and the surrounding thyroid parenchyma were free of regressive changes and/or lympho-monocytic inflammatory reactions. Enzyme histochemistry confirmed the hyperfunctioning character of the lesion and showed reduction of succinic dehydrogenase and cytochrome-c-oxydase activity in the viable tissue surrounding the central necrotic areas. By electron microscopy, the hyperfunctioning follicular epithelium showed submicroscopical alterations of the adenomatous cells surrounding the areas of coagulative necrosis. These results suggest that control of hyperthyroidism, after PEI, is due to: a) directly induced, irreversible damage (coagulative necrosis and vascular thrombosis with hemorrhagic infarction) in the central areas of the lesion; b) potentially reversible damage (reduction of intracellular enzyme activity and ultrastructural changes) in the peripheral areas
The use of engineered biomaterial bone plexur m® in benign epiphyseal tumors: our experience at 20 months of follow-up.
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L’influenza dell’interdipendenza sulla costruzione di rappresentazioni condivise
No full textIl presente lavoro ha voluto indagare se l’emergere di rappresentazioni condivise, ritenute essere alla base dell’azione condivisa, possa essere influenzato da fattori sociali, quali l’appartenenza di gruppo ed il rapporto di interdipendenza che lega due co-agenti. Tenendo in considerazione alcuni costrutti derivanti dalla psicologia sociale, in due esperimenti è stato chiesto ai partecipanti di svolgere insieme un compito Simon, manipolando la percezione di appartenenza allo stesso gruppo in base ad una categorizzazione sperimentale creata ad-hoc (Esperimento 1: coppie appartenenti vs. coppie non appartenenti alla stessa categoria) e il tipo di relazione di interdipendenza (Esperimento 2: situazione cooperativa vs. competitiva). I risultati dimostrano come l’effetto Simon sociale non sia modulato da una semplice categorizzazione in gruppi, ma sia significativamente influenzato dal tipo di interdipendenza percepita. L’effetto Simon risulta infatti assente solo nella situazione competitiva. Questi dati suggerirebbero che in condizioni di interazione, di norma, gli individui tendono a costruire rappresentazioni condivise che presuppongono la cooperazione tra individui. Mentre l’appartenenza a gruppi diversi non compromette la costruzione di rappresentazioni condivise, l’interazione competitiva tra gli individui della stessa coppia la influenza negativamente
"Closing the R&D Gap, Evaluating the Sources of R&D Spending"
No full textBoth spending and tax policies have been implemented in the United States with the goal of stimulating private sector research and development (R&D). Karier questions whether current R&D policy, especially the research and experimentation tax credit, can contribute to closing the gap between nondefense expenditures on R&D in the United States and such expenditures in other countries, such as Japan and Germany. He also explores possible changes to our current R&D policy to make it more effective.
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