1,721,014 research outputs found
Brevi note ornitologiche dalla Sicilia occidentale
No full textOrnithological short notes from western Sicily (Italy
Recenti scavi e ricerche a Terravecchia di Cuti
No full textThe aim of this paper is to illustrate the preliminary results of research (intrasite survey and excavation) carried out from 2013 to 2017 in the fortified settlement of Terravecchia di Cuti. The intrasite survey allowed to select the excavation area. Some walls, part of two distinct buildings, have been identified: the most interesting structure is a large room, perhaps a courtyard, around which there are at least three rooms. Remains of pithoi are in the rooms, and two on the courtyard floor. Remains of other walls have also been identified, different in orientation and composition compared to the structures described; these walls are older than the buildings 1 and 2. Finally, it seems that the abandonment of the courtyard and the surroundings is to be placed at the end of the fifth century BC, while elements to date the previous structures are missing
Temporary Kerato-Prosthesis to Resolve Traumatic Loss of a Healed Corneal Button
Full text linkThe aim of this study is to report a rare case of traumatic complete loss of a donor corneal button successfully resolved by a 24-h implantation of a temporary kerato-prosthesis. A healthy 30-year-old man with a history of prior penetrating keratoplasty (PKP) presented with an open globe following accidental contusive trauma with a ball, while he was playing football. At slit-lamp evaluation, complete dehiscence of the wound at the graft-host junction and complete corneal button loss was evident. The patient was immediately taken to the operating room, but a donor cornea was not available; therefore, a vitreo-retinal temporary kerato-prosthesis was implanted to close the eyeball until a new donor cornea was available. In case of complete dehiscence of the donor-host junction after PKP with corneal button loss, it is possible to use a temporary kerato-prosthesis to stabilize the eye and contain the intraocular structures. We recommend the availability of temporary vitreo-retinal kerato-prosthesis in the operating theatres of Corneal Surgical Units
Il caso di Poggio Meta. Indagini sul versante orientale del colle
Full text linkIl lavoro illustra i risultati delle indagini archeologiche e di topografia urbana effettuate nell'estate del 2014 sul versante orientale della collina di Poggio Meta, all'interno dell'abitato di Akragas. E' stato messo in luce parte di un isolato, la cui cronologia va dall'età arcaica alla tarda età ellenistica, e, anche in seguito alle indagini da telerilevamento (ripresa a bassa quota da drone e indagini georadar) è stato possibile avanzare delle ipotesi sul piano urbanistico della città, che in questa area presenta due orientamenti sovrapposti e leggermente divergenti, verificando in tal modo alcune ipotesi avanzate nella carta archeologica del Parco di Agrigento
Bilateral retinoblastoma and osteogenesis imperfecta, a very rare association: Two cases
No full textIntroduction: This case report presents two patients affected by a very rare association of bilateral retinoblastoma and osteogenesis imperfecta. Case report: Two Caucasian males with familial history and clinical signs of osteogenesis imperfecta came to our attention for bilateral leukocoria. The ocular fundus examination revealed bilateral retinoblastoma. Proper therapies were dispensed in order to achieve full regression. Genetic counseling was performed. Discussion: The primary role of genetics in retinoblastoma pathogenesis in widely known, and different genes have been identified. Osteogenesis imperfecta is a rare connective tissue disorders, caused by mutated genes encoding for collagen. The single gene defect in osteogenesis imperfecta type VI is Serpin Family F Member 1 (SERPINF1), a neurotrophic factor for the neuronal differentiation in retinoblastoma cells. The association of bilateral retinoblastoma and osteogenesis imperfecta could be the result of the mutation of a single gene playing a role in a hypothetical common pathway. © The Author(s) 2020
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
Mental rotation training in older adults: The role of practice and strategy
No full textThere is evidence of mental rotation (MR) abilities responding to training even in older adults, but it is still not clear whether such training would have generalized and maintained effects. The aim of the present study was to examine the specific short- and long-term gains, and any transfer effects, induced by rotation training in healthy older adults. The study involved 43 healthy older adults: 14 practiced with 2 MR tasks, that is, a 3D same/different comparisons task and a Tetris game (the Mental Rotation [MR] group); 15 were trained to use a strategy based on concrete object manipulation and imagery, then practiced with the 2 rotation tasks (Strategy [S] + MR group); and 14 were involved in alternative nonspatial activities (active control group). Transfer and maintenance effects were assessed (after 1 month) using tasks similar to those used in the training (criterion tasks), different spatial tasks (mental rotation and perspective taking tasks) and a fluid intelligence task. The results showed a trend toward an improvement in successive training sessions. The S + MR and MR groups both gained substantially more than the active control group in the short- and long-term, in the criterion tasks and most of the tasks testing transfer effects. The S + MR group showed greater long-term gains than the MR group in most tasks. These findings support a positive effect of rotation training in older adults, particularly when associated with strategy use. (PsycINFO Database Recor
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