1,266 research outputs found
Eye movements for performance. Saccades and microsaccades in elite table tennis players
No full textAim: Investigation of the combined occurrence and characteristics of saccades and microsaccades during free-viewing sport task, with the intention to explore gaze behaviour that would optimize information gathering for action outcome prediction.
Methods: Gaze behaviour of expert and novice table tennis players was recorder during a task in which subjects were instructed to predict the ball future direction after the opponent’s throw. Response accuracy, reaction time, fixations, microsaccades and saccades were recorded to estimate the relationship between gazing strategy and success in the task. Analysis of the sequence of saccades/fixations and microsaccade dynamics (during fixations) allowed to study allocation of overt or covert attention in successful predictions.
Results: Compared to novices, experts showed more correct responses (70% vs. 64%) with shorter reaction time (411.88±94.62 vs. 468.56±123.22 ms). Experts fixated more times and for longer periods, with more saccades and microsaccades, on hand-racket during forehand and on trunk during backhand drive technique. Furthermore, experts showed a narrower frequency distribution of microsaccade orientations when fixating on hand-racket and trunk areas, meaning that the attention was focused on those small locations.
Conclusions: Microsaccades and saccades can be related to the salience of interest areas during performance. Athletes who play ball games are repeatedly exposed to motion stimuli during their training, improving their perception of moving objects. The link between visuomotor performance and covert attention shifts could have a potential impact upon sports, as for example assessments of visual performance that can help to predict people who have elite potential. On these premises, one can suggest that vision training offers a mean to improve performance.
References:
1. Piras A, Raffi M, Lanzoni IM, Persiani M, & Squatrito S. (2015) Microsaccades and prediction of a motor act outcome in a dynamic sport situation. Invest Ophthalmol Vis Sci Title, 56(8), 4520–4530.
2. Piras A, Lanzoni IM, Raffi M, Persiani M, & Squatrito S. (2016). The within-task criterion to determine successful and unsuccessful table tennis players. Int J Sports Sci Coach, 11(4)
I magi zoroastriani e i segni dei tempi
No full textI magi nella cultura zoroastriana e il loro sapere iniziatico, divinatorio, predittivo e scrutatore di segni rivelatori di epoche e di avventi redentivi di Salvator
Rapimento estatico, rivelazione e predicazione in Mani e nel manicheismo
No full textAnalisi delle esperienze mistico-estatiche di Mani, sulla base dei testi greci (CMC) e di altri documenti manichei (testi iranici).
CONTENUTI: si sono evidenziati i contesti e le ricorrenze di terminologie estatiche di "rapimento", con innovative acquisizioni dello specifico carattere paolino dell'esperienza di Mani (giudeo-cristiana, battista, gnostica).
METODOLOGIA: esposta nel contributo dove di evidenzia una continuità della dottrina che valorizza i tratti compositi dell'esperienza religiosa di Mani e il versante cristiano (oltre a quello mazdaico e buddhista) delle testuali a noi giunt
Testi greci e latini: Alessandro di Licopoli, Contro le dottrine di Mani; Egemonio, Acta Archelai, in Epifanio, Panarion 25-31; Agostino, De natura boni, Contra Faustum
No full textIntroduzione, traduzione e commento di alcuni testi classici di polemica antimanichea
Shared Terminologies between Christianity and Manichaeism
No full textLe connessioni culturali tra manicheismo e cristianesimo. Uso delle scritture neotestamentarie nei testi manichei e loro reinterpretazione nell'idioma proprio del manicheismo. Analogie tra espressioni formulari della "clothing imagery" e della "letter imagery" definite da S. Brock
Il Manicheismo, volume II. Il mito e la dottrina: i testi manichei copti e la polemica antimanichea
No full textIntroduzioni e traduzioni:
testi copti (a cura di S. Pernigotti e S. Demaria)
testi greci e latini (a c. di A. Piras)
testi siriaci (a c. di R. Contini)
testi medio-persiani (a c. di C.G. Cereti)
testi arabi (a c. di Alberto Ventura)
Commento ai testi:
da pp. 279 a 35
‘Res Romana’ e ‘Latium’. Tradizione letteraria e memoria storica: Ennio, Orazio e Virgilio
No full textIl rapporto con il Lazio ha sempre costituito un elemento di forte rilevanza simbolica per i Romani, anche se i termini 'Roma' e 'Latium' compaiono di rado assieme nella letteratura latina conservata. Ha avuto una certa eco un frammento degli Annales di Ennio (465 s. Vahlen2 = 494 s. Skutsch), di collocazione e interpretazione non sicura, in cui la fortuna di Roma e del Lazio procedono di pari passo. I versi sono stati citati da Varrone nella Menippea Testamentum (fr. 542) e parodiati da Orazio nelle Satire (1, 2, 37 s.). Di essi si trovano tracce anche nel Carmen saeculare e nell’opera di Livio ed è possibile che li abbia avuti presente anche Virgilio in Aen. 12, 147 s., nel discorso di Giunone a Giuturna in cui la dea annuncia la ormai prossima fine di Turno e la sconfitta degli abitanti del Lazio ostili ai Troiani e a Enea, premessa necessaria alla futura gloria di Roma.The relationship with Latium always carried a strong symbolic value for the Romans, although the words 'Roma' and 'Latium' are scarcely mentioned together in the preserved Latin literature. A renowned fragment of the Annals of Ennius (465 s. Vahlen2 = 494 s. Skutsch), whose pertinence and interpretation are uncertain, correlates the success of Rome with Latium. The verses are quoted by Varro in the Menippean Testamentum (fr. 542) and mocked by Horace in the Satires (1, 2, 37 s.). They are echoed in the Carmen saeculare as well as in Livy's work; and Virgil possibly bore them in mind in Aen. 12, 147 s., remarkably in Juno’s speech to Iuturna, when the goddess announces the approaching end of Turnus and the defeat of the inhabitants of Latium who are hostile towards Aeneas and the Trojans, necessary precondition for the future glory of Rome
Neck iodine fixing foci in differentiated thyroid carcinoma (DTC) follow-up patients: a 131 I-SPECT/CT study.
No full textNon-standard roundabouts: analysis of problems
No full textRoad intersections are dangerous places in the road system due to the high number of conflicting points between motorized and non-motorized vehicles. In the case of defined traffic volume, several research groups have proven that roundabouts reduce the number of injuries and fatal accident cases.
In the last years, several studies have investigated the performance of roundabouts, among which, include different models with the ability to calculate the entering flow (Qe) as a function of the circulating flow (Qc).
This research work has focused on an analysis of the performance features of Italian urban roundabouts, that have non-standard geometric characteristics.
The goal of the research work is to analyze, on the basis of geometrical and design parameters, the capacity of the "non-standard roundabouts" in order to understand in which way non-standard features influence capacity. The study underlines that in standard roundabouts the entering flow is reduced when the circulating flow increases (like in the existing international models) and in non-standard roundabouts the entering flow is not reduced when the circulating flow increases (it seems that there is not a relationship between circulating flow and entering flow
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