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Tra le cave e il Delta del Po. Vie di trasporto e dinamiche del commercio della pietra
No full textIl contributo presenta i primi risultati di un ampio progetto di ricerca volto ad indagare le forme di approvvigionamento, trasporto ed utilizzo dei diversi litotipi nell’antica regione della Venetia et Histria, corrispondente al settore nord-orientale della penisola italiana, durante l’età romana. Lo studio è stato supportato da una serie di estesi campionamenti del materiale architettonico ed edilizio effettuati presso due siti dell’area del Delta del Po. Un elevato numero di campioni è stato prelevato presso il Museo archeologico nazionale di Adria, già municipio romano, e presso l’insediamento di San Basilio, mansio stradale lungo la via Annia. Le analisi archeometriche hanno consentito di definire i litotipi dei campioni prelevati e di confrontare questi dati con il database di riferimento relativo ai bacini di approvvigionamento della pietra dell’ambito geologico veneto-friulano ed emiliano.
Questa comparazione ha consentito di ricostruire la fitta rete infrastrutturale (fluviale ed endolagunare) che consentiva ai carichi
di materiale lapideo di transitare dalle cave agli insediamenti dove erano utilizzati e di comprendere la relazione tra la frequenza
dell’impiego dei materiali e le dinamiche del loro trasport
A fix-propagate-repair heuristic for mixed integer programming
Full text linkWe describe a diving heuristic framework based on constraint propagation for mixed integer linear programs. The proposed approach is an extension of the common fix-and-propagate scheme, with the addition of solution repairing after each step. The repair logic is loosely based on the WalkSAT strategy for boolean satisfiability. Different strategies for variable ranking and value selection, as well as other options, yield different diving heuristics. The overall method is relatively inexpensive, as it is basically LP-free: the full linear programming relaxation is solved only at the beginning (and only for the ranking strategies that make use of it), while additional, typically much smaller, LPs are only used to compute values for the continuous variables (if any), once at the bottom of a dive. While individual strategies are not very robust in finding feasible solutions on a heterogeneous testbed, a portfolio approach proved quite effective. In particular, it could consistently find feasible solutions in 189 out of 240 instances from the public MIPLIB 2017 benchmark testbed, in a matter of a few seconds of runtime. The framework has also been implemented inside the commercial MIP solver Xpress and shown to give a small performance improvement in time to optimality on a large internal heterogeneous testbed
Interpretation and management of T wave inversion in athletes: An expert opinion statement of the Italian Society of Sports Cardiology (SICSPORT)
Full text linkT wave inversion (TWI) on the electrocardiogram (ECG) is a relatively common finding in athletes. It poses a diagnostic challenge, as it can indicate either a benign physiological pattern or an early sign of serious cardiac pathology. This expert opinion statement provides a comprehensive review of the current understanding of TWI in athletes, emphasizing the importance of its localization, associated clinical features, and demographic factors in guiding its interpretation and management. We explore the potential causes of TWI, including physiological adaptations such as the juvenile pattern and training-induced repolarization variants, as well as pathological conditions like cardiomyopathies, ion channel diseases, and other cardiac abnormalities. Additionally, we discuss the implications of TWI in different ECG leads-anterior, inferior, and lateral-and the diagnostic work-up needed to exclude underlying disease. The importance of follow-up in athletes with TWI is highlighted, particularly for young athletes, to monitor the potential development of cardiomyopathy. Finally, we address considerations for sports eligibility in athletes with TWI, stressing the need for a balanced approach that ensures athlete safety without imposing unnecessary restrictions and investigations
[Recensione di] C. Catapano, Filosofie medievali. Dalla tarda antichità all’Umanesimo, Carocci editore, Roma 2024
No full textLa rivoluzione rinviata per motivi tecnici ovvero la politica apolitica dei Vigliacchi di Josef Škvorecký
No full textIl testo ricostruisce la storia del romanzo "I vigliacchi" di Josef Škvorecký, a partire dal momento della stesura, analizzandone anche la carica sovversiva al momento della prima edizione (1958
Clinical and radiographic outcomes of extra-short implants (≤ 6 mm) in the posterior atrophic jaws: a retrospective cohort study
Full text linkObjective: This study aimed at investigating implant survival rate and marginal bone loss (MBL) around extra-short implants. The impact of the loading protocol and of the use of an intermediate abutment was also evaluated, to explore possible differences in terms of the outcome measures. Materials and methods: Patients with single or multiple mandibular or maxillary posterior edentulism rehabilitated using extra-short 5-6 mm long implants were included. Different prosthetic protocols were used. Clinical and radiological follow-up was 5 years. The outcomes measures were implant survival and MBL. Results: The analysis included 56 implants placed in 34 adults (12 males and 22 females; mean age 60 years, SD 11). Six implants failed during a median follow-up of 5 years and 4 of them were recorded in one patient at 2-year follow-up. The 5-year implant survival was 89% overall (87% in conventional and 94% in immediate loading). At univariate analysis, during follow-up immediate loading was associated with higher MBL (mean variation 0.21 mm, 95%CI 0.01 to 0.40; p = 0.02), while intermediate abutment was associated with lower MBL (mean variation -0.23 mm, 95%CI -0.39 to -0.09; p = 0.003). Multivariable analysis confirmed that immediate loading was associated with higher MBL. Conclusion: Within its limitations, this study showed that extra-short implants under immediate loading conditions can be a reliable solution. The application of horizontal and vertical platform switching with the use of intermediate abutments seems to be able to contribute to the reduction of MBL
Animali meravigliosi: rappresentare il miracolo tra «energia» e 'adfectus' nel bestiario del «Mondo creato»
No full textIl Mondo creato is a “sacred poem” in which Torquato Tasso narrates the seven days of Creation. He attempts to reconcile the truth of science and revelation in the truth of the poetic world, according to a conception of faith common to both hexameronal literature and to Dionysian as well Pichian Platonism. The representation of the miracle is intended to reveal God’s heavenly Book through the Book of Nature, in a language similar to that of emblems or feats. By using techniques of evidentia such as energia, ekphrasis, the ‘negative formula’, the poet aims to arouse wonder in the reader-spectator, that is, an affect that produces an inner illumination. Animals obtain the specific function of making manifest the miracle of animated life. They stage an exemplary theatre of passions and virtues that educates the reader’s affects and reveals “by degrees” the mystery of Redemption through the relationship of analogy with Christ
La variación interlingüística en un corpus de textos pedagógicos metalingüísticos publicados en Argentina en la primera mitad del siglo XX
No full textEn el ámbito de la reconstrucción y la sistematización de la evolución de las gramáticas y de los manuales de italiano como lengua extranjera dedicados expresamente a hispanófonos, este estudio pretende aportar datos sobre el recurso a las descripciones interlingüísticas y al uso del español rastreables en un micro-corpus de textos metalingüísticos pedagógicos, publicados en Argentina en la primera mitad del siglo XX. El italiano se había convertido en lengua obligatoria en la educación media a comienzos del siglo XX hasta que en 1914 se declaró facultativa. En 1917 se restableció con carácter obligatorio hasta que en 1941 se volvió a declarar facultativa durante todo el ciclo de la educación media.
A partir de la consideración según la cual (i) los textos metalingüísticos objeto de estudio son herramientas tanto teóricas como pedagógicas que permiten conectar culturas y (ii) que la variación interlingüística desempeña un papel de gran envergadura a la hora de desarrollar una conciencia metalingüística en el alumno, se intenta objetivar los discursos y las explicaciones de los autores acerca del funcionamiento de la lengua a través de la identificación de tendencias generales en la variación interlingüística en los textos