2,353 research outputs found
About the new IconologyThe Geology of Images: Looking at Mantegna's Work
No full textIn questo saggio sulla New Iconology l'autore affronta il ruolo che lo stile assume nell'opera di Mantegna, discutendo questo alla luce della geologia e dell'archeologia. L'interesse per l'opera d'arte come oggetto e come immagine è al centro della ricerca teorica; l'approccio artistico intreccia l'antropologia, e i Visual Studies, attraverso quel principio di azione che Alfred Gell chiama agency. L'Autore in questo saggio discute come Mantegna nelle sue opere d'arte produce agency e come attraverso lo stile e la materialitaà dell'opera esprime la propria intenzionalità
all'interno del contesto artistico e culturale del suo tempo.In this essay about the New Iconology, the Author takes in account the role that style plays in Mantegna's work, discussing this in the light of geology and archeology. Interest in the artwork as object (artfact) and as image is at the centre of contemporary theoretical research; the artistic approach intersecting the anthropological one and that of visual studies. The Author in this essay discuss how Mantegna produces agency; then how his work of art, analized stylistically and materiality, espress his own intentionality within the social and cultural context in his tim
Unificación de patrullas
No full textEl trabajo realizado tuvo como finalidad el desarrollo y mejora de herramientas de gestión para fortalecer el control y la eficiencia operativa. Como parte de estas iniciativas, se comenzó por el desarrollo de un sistema de Gemba Walk, para facilitar la supervisión y detección de oportunidades de mejora en el puesto. Asimismo, se gestionó y controló la documentación, asegurando el cumplimiento de los estándares establecidos. Además, se ejecutaron auditorías 5s, promoviendo un entorno de trabajo más ordenado y eficiente. La elaboración de informes para los auditados permitió registrar hallazgos y oportunidades de mejora, alineando estas acciones con la optimización de procesos y el mantenimiento de estándares de calidad.Fil: Mansilla Cieri, Manuel. Universidad Nacional del Noroeste de la Provincia de Buenos Aires. Escuela de Tecnología; Argentina.Ingeniería Industria
Using Mixed Incentives to Document Xi’an Guanzhong
No full textThis paper describes our use of mixed incentives and the citizen science portal LanguageARC to prepare, collect and quality control a large corpus of object namings for the purpose of providing speech data to document the under-represented Guanzhong dialect of Chinese spoken in the Shaanxi province in the environs of Xi’an.Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.Multimedia Computin
Drell-Yan lepton-pair production: QT resummation at N3LL accuracy and fiducial cross sections at N3LO
No full textWe present high-accuracy QCD predictions for the transverse-momentum (qT) distribution and fiducial cross sections of Drell-Yan lepton pairs produced in hadronic collisions. At small values of qT we resum to all perturbative orders the logarithmically enhanced contributions up to next-to-next-to-next-to-leading logarithmic (N3LL) accuracy, including all the next-to-next-to-next-to-leading order (N3LO) [i.e., O(αS3)] terms. Our resummed calculation has been implemented in the public numerical program DYTurbo, which produces fast and precise predictions with the full dependence on the final-state lepton kinematics. We consistently combine our resummed results with the known O(αS3) fixed-order predictions at large values of qT thus also obtaining full N3LO accuracy for fiducial cross sections. We show numerical results at LHC energies discussing the reduction of the perturbative uncertainty with respect to lower-order calculations
Vector-boson production at hadron colliders: hard-collinear coefficients at the NNLO
No full textWe consider QCD radiative corrections to vector-boson production in hadron collisions. We present the next-to-next-to-leading order (NNLO) result of the hard-collinear coefficient function for the all-order resummation of logarithmically enhanced contributions at small transverse momenta. The coefficient function controls NNLO contributions in resummed calculations at full next-to-next-to-leading logarithmic accuracy. The same coefficient function is used in applications of the subtraction method to perform fully exclusive perturbative calculations up to NNLO
Failure Modes in Road Tunnels of Sierra Valle Fertil. San Juan. Argentina
No full textFil: Aceituno Cieri, Paula. Dirección Nacional de Vialidad. San Juan; Argentina.Fil: Martino, Roberto D. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas, Físicas y Naturales; Argentina.Fil: Giambastiani, Mauricio. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas, Físicas y Naturales; Argentina.Fil: Rocca, Ricardo J. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas, Físicas y Naturales; Argentina.The Sierra de Valle Fertil is located in the west of Argentina (San Juan province). It is crossed by the National Road 150, that has 40 km in length including six bidirectional road tunnels with a total length of 2000 meters. The geological formations are various Carbonic Permian (Paganzo Basin) and Triassic (Ischigualasto-Villa Union Basin) sedimentary rocks, in an area adjacent to the Ischigualasto Natural Park. The Sierra has been formed by the reactivation of the basin during the formation of the Andes (Pliocene-Pleistocene) with a thick-skinned tectonics. The trace of the route follows a creek that cuts anticlinal folds. The first three tunnels are developed through soft sandstones with siltstones and shales (middle Triassic). The two following slightly
cemented sandstones and conglomerates (Lower Triassic) and the last is in rigid greywackes (upper Carbonic). The support provided by the design was estimated by using RMR and Q method. During construction geological surveys were conducted on the front as it was excavated, and expected support was adjusted according to them. Different failure modes observed in rigid and soft rock are analyzed together with the solutions provided during construction. The tunnels excavated in stiff rocks were less demanding than those provided for in the design. Instead, the tunnels in soft rocks required more supports than those stipulated in the design.Fil: Aceituno Cieri, Paula. Dirección Nacional de Vialidad. San Juan; Argentina.Fil: Martino, Roberto D. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas, Físicas y Naturales; Argentina.Fil: Giambastiani, Mauricio. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas, Físicas y Naturales; Argentina.Fil: Rocca, Ricardo J. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas, Físicas y Naturales; Argentina.Ingeniería Civi
Threshold resummation at N3LL accuracy and soft-virtual cross sections at N3LO
No full textWe consider QCD radiative corrections to the production of colorless high-mass systems in hadron collisions. We show that the recent computation of the soft-virtual corrections to Higgs boson production at N3LO [1] together with the universality structure of soft-gluon emission can be exploited to extract the general expression of the hard-virtual coefficient that contributes to threshold resummation at N3LL accuracy. The hard-virtual coefficient is directly related to the process-dependent virtual amplitude through a universal (process-independent) factorization formula that we explicitly evaluate up to three-loop order. As an application, we present the explicit expression of the soft-virtual N3LO corrections for the production of an arbitrary colorless system. In the case of the Drell-Yan process, we confirm the recent result of Ref. [2]
Commentary: Combining Ecosystem and Single-Species Modeling to Provide Ecosystem-Based Fisheries Management Advice Within Current Management Systems
No full textA Commentary on: 'Combining Ecosystem and Single-Species Modeling to Provide Ecosystem-Based Fisheries Management Advice Within Current Management Systems' by Howell, D., Schueller, A. M., Bentley, J. W., Buchheister, A., Chagaris, D., Cieri, M., Drew, K., Lundy, M. G., Pedreschi, D., Reid, D. G., and Townsend, H. (2021). Front. Mar. Sci. 7:607831. doi: 10.3389/fmars.2020.60783
The Fate of Patients Treated in Emergency for True-Ruptured Abdominal Aortic Aneurysms After 30 Days and 6 Months: Is There a Benefit from Endovascular Repair?
No full textBackground. Endovascular aneurysm repair (EVAR) has been claimed to decrease periprocedural mortality for treatment of abdominal aortic aneurysms with suspected rupture (rAAA). However the benefit of EVAR in true clinical emergencies (plain ruptured AAA) is still uncertain. This study aimed to analyze immediate and mid term outcomes of true rAAA treated in emergency.
Methods. All patients treated for rAAA from 2006 to 2010 were reviewed. Our policy is to perform an immediate computed tomography (CT) in emergency room (ER) for all patients with suspected rAAA. Only patients with evident aneurysm rupture on imaging were selected for this study. EVAR feasibility was left to the discretion of the operative specialized team available 24hours/day. Stability of EVAR repair was assessed with pre-discharge CT-scan.
Results. A total of 66 patients with plain rAAA were treated in emergency: 23 underwent EVAR and 43 open surgery. At baseline there was an equal distribution of physiologic characteristics and comorbidities with the exception of age, older in the EVAR group. Intraoperative mortality was 0% in EVAR and 9.3% (4/43) in the open group (p=0.29) while 30-day mortality rates were 21.7%(5/23) vs 34.8%(15/43), respectively (p=0.39). Life table estimates at 6 and 15 months showed survival rates of 54% and 50% after open surgery and of 65% and 58% after EVAR (p=0.19). Endoleak presence was detected on CT in 6 EVAR patients who survived until discharge (none of these required immediate treatment due to small size).
Conclusions. Despite the use of EVAR can decrease intraoperative mortality in emergencies for plain rAAA, mortality can involve more than one fifth of these patients at 30-day and one third at six months. The frequent detection of endoleak (more than one fourth of rAAA) at discharge can raise the question whether EVAR might be used as an effective bridge solution for hemodynamic stabilization to be re-evaluated in a later stage.
Author Disclosures: P. De Rango: None. M. Lenti: None. E. Cieri: None. F. Verzini: None. G. Simonte: None. P. Bonanno: None. A. Casalino: None. P. Cao: None.
Key Words: Abdominal aortic aneurysm • Stent • Emergency care • Vascular surgery • Tea
Universality of transverse-momentum resummation and hard factors at the NNLO
No full textWe consider QCD radiative corrections to the production of colorless high-mass systems in hadron collisions. The logarithmically-enhanced contributions at small transverse momentum are treated to all perturbative orders by a universal resummation formula that depends on a single process-dependent hard factor. We show that the hard factor is directly related to the all-order virtual amplitude of the corresponding partonic process. The direct relation is universal (process-independent), and it is expressed by an all-order factorization formula that we explicitly evaluate up to the next-to-next-to-leading order (NNLO) in QCD perturbation theory. Once the NNLO scattering amplitude is available, the corresponding hard factor is directly determined: it controls NNLO contributions in resummed calculations at full next-to-next-to-leading logarithmic accuracy, and it can be used in applications of the qT subtraction formalism to perform fully-exclusive perturbative calculations up to NNLO. The universality structure of the hard factor and its explicit NNLO form are also extended to the related formalism of threshold resummation
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