327,836 research outputs found

    Per Martino Filetico maestro di Francesco Colonna di Palestrina. La "πολυφιλία" e il gruppo marmoreo delle Tre Grazie

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    Viene proposto il nome di Martino Filetico quale possibile Maestro di Francesco Colonna di Palestrina in virtù del fatto che il Filetico nel manoscritto delle sue Iocundissimae Disputationes (1462-63) fa menzionare a Battista Sforza per la prima volta il termine greco "poluphilia" che poi sarà usato nel titolo dell'Hypnerotomachia Poliphili (1499). A sostegno di questa ipotesi S. COLONNA cita il fatto che M. FILETICO viene chiamato a Roma quale maestro del cugino di Francesco Colonna, vale a dire il futuro cardinale Giovanni Colonn

    L'Hypnerotomachia e Francesco Colonna romano: l'appellativo di "frater" in un documento inedito

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    Viene pubblicata in appendice il testo della Bolla di nomina di Francesco Colonna romano signore di Palestrina a Canonico di S. Pietro in Roma evidenziando il fatto che gli viene riferito l'appellativo di "frater". Questo fatto può essere interessante ai fini dell'attribuzione dell'Hypnerotomachia Poliphili, libro anonimo stampato da Aldo Manuzio a Venezia nel 1499 il cui autore era rivelato da un acrostico che recitava: «Poliam frater Franciscvs Colvmna peramavit

    Il monastero romano di Regina Coeli. Dalla fabbrica di Anna Colonna Barberini alla Casa Circondariale di Roma

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    Il volume prende in esame, attraverso una inedita documentazione, la storia del monastero di Regina Coeli fondato da Anna Colonna Barberini nel 1643 e quella dell'attiguo monastero della Visitazione di S. Maria voluto da Clemente IX con il concorso del nipote Giacomo Rospigliosi. Nuove indagini archivistiche hanno inoltre consentito di ripercorrere le vicende che portarono alla demolizione del primo dei due complessi religiosi e alla conseguente edificazione dell'attuale Casa Circondariale di Roma

    Spirotiger®: a new proposal in subjects affected by low back pain

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    Purpose: Low Back Pain (LBP) is a common spine disorder related to muscle imbalances at different level. In particular, biomechanics of breathing can be negatively modified in people affected by LBP through his connection with postural system. The aim of this study was to determine if a Respiratory Muscles Endurance Training (RMET) using Spirotiger device during posterior kinetic chain stretching could improve mobility and pain in subjects affected by (LBP). Moreover, a possible link between the diaphragm and hamstrings muscles was highlighted. Methods: Six subjects (main age: 52.3 years ± 14.25) with diagnosis of LBP and “flexion pattern syndrome” (according to O'Sullivan P., Sahrmann S. and Colonna S. studies) were included in the research. Participants were divided into a training group (TG, n=4) that perform RMET by Spirotiger during hamstring and glutes stretching and a control group (CG, n=2) that only did stretching. Both group trained for a total number of 9 sessions during a 4 weeks period. In addition to RMET and stretching TG and CG performed the same amount of strength exercise of the hip flexors and back muscles to restore the muscles imbalance. Before and after the training time, both group were tested by quality of life questionnaire (SF-12), numerical pain rate scale (NPRS) and Active Knee Extension Test (AKET) using the IMU sensor Wiva Science. Results: TG improved the SF-12 Physical Component Summary scale of 6.66 points, according to the reduced pain perception on the NPRS for an average of 3.33 points and an improvement of 12.36° in AKET. AGGIUNGERE CG Conclusions: This results suggests that subjects affected by LBP could benefit from a RMET during stretching posture of hamstrings muscles by reducing pain, improving hip mobility and boosting quality of life. The myofascial link between diaphragm and hamstrings muscles could support the biomechanical hypothesis and make the RMET a new proposal in LBP exercise treatment. References: González-Álvarez FJ, Valenza MC, Torres-Sánchez I, Cabrera-Martos I, Rodríguez-Torres J, Castellote-Caballero Y. Effects of diaphragm stretching on posterior chain muscle kinematics and rib cage and abdominal excursion: a randomized controlled trial. Braz J Phys Ther. 2016 Sept-Oct; 20(5):405-411. Hiromune Obayashi, Yukio Urabe, Yuki Yamanaka, and Ryo Okuma. Effects of Respiratory-Muscle Exercise on Spinal Curvature. Journal of Sport Rehabilitation, 2012, 21, 63-68 © 2012 Human Kinetics, Inc

    A cohesive-zone model for steel beams strengthened with pre-stressed laminates

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    AbstractWe analyse the problem of a simply supported steel beam subjected to uniformly distributed load, strengthened with a pre-stressed fibre-reinforced polymer (FRP) laminate. According to the assumed application technology, the laminate is first put into tension, then bonded to the beam lower surface, and finally fixed at both its ends by suitable connections. The beam and laminate are modelled according to classical beam theory. The adhesive is modelled as a cohesive interface with a piecewise linear constitutive law defined over three intervals (elastic response, softening response, debonding). The model is described by a set of differential equations with suitable boundary conditions. An analytical solution to the problem is determined, including explicit expressions for the internal forces and interfacial stresses. For illustration, an IPE 600 steel beam strengthened with a Sika® Carbodur® FRP laminate is considered. First, the elastic limit state load of the unstrengthened beam is determined. Then, the loads corresponding to the elastic limit states in the steel beam, adhesive, and laminate for the strengthened beam are calculated. As a result, the increased elastic limit state load of the strengthened beam is obtained
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