1,805 research outputs found
Flexible Measures in Magnetic Active Shielding
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Flexible measures in magnetic Active Shielding .This paper appears in:
Electromagnetic Field Computation (CEFC), 2010 14th Biennial IEEE Conference on
Date of Conference: 9-12 May 2010
Author(s): Formisano, A.
Dip. Ing. dell'Inf., Seconda Univ. di Napoli, Aversa, Italy
Lupoli, M.C. ; Martone, R.
Page(s): 1
Product Type: Conference Publications
5481633 searchabstract .Abstract
The reduction in protected regions of low frequency magnetic fields is a complex problem when the sources are not known. The paper proposes a procedure able to choose the best currents able to mitigate the disturbance field. The magnetic field is represented by suitable series of eigenfunctions in the domain of interest. The procedure includes a field identification step starting from a set of measurements and a current design step, possibly based on a preliminary design of specialized shimming coils sets
Enhancing Seismic Performance of Steel Plate Shear Walls Through Innovative Design and Curved Shape Slots
No full textThis study introduces innovative Steel Plate Shear Walls (SPSWs) with a specific shape as seismic energy dissipative devices for both new and existing structures. These systems incorporate curved shape slots and varying opening ratios, significantly impacting their seismic performance. A comprehensive numerical investigation of the cyclic behavior of these panels is conducted using the Finite Element Method (FEM) with ABAQUS software. The numerical model is validated by means of the comparison with experimental data of previously tested specimens available in the literature. The analyses provide a thorough assessment of the hysteretic behavior of specimens, including key performance metrics, such as maximum load-carrying capacity, initial stiffness, and out-of-plane displacements up to 5% drift. Additionally, eigenvalue analysis is employed to calculate the critical elastic buckling load for each specimen. The study compares the ratio between the yielding force and the elastic buckling force, as well as critical parameters influencing out-of-plane deformations, for each configuration. Finally, the optimal configuration of innovative SPSWs with a specific shape, incorporating curved shape slots, is suggested based on design parameters related to the hysteretic behavior
La compilazione di viaggi di Alessandro Zorzi: Firenze, Biblioteca Nazionale Centrale, B. R. 233-236
No full textPresentazione della compilazione di viaggi di Alessandro Zorzi conservata nella Biblioteca Nazionale Centrale di Firenze, con particolare riferimento al voilume segnato B. R: 234, accompagnata dalla riproduzione in CD-rom dello stesso
Quelques remarques sur les traductions francaises des récits de voyage italiens au XVIème siècle
No full textStudio filologico e linguistico della traduzione francese della Relazione di Antonio Pigafetta sul viaggio di Magellano
Seismic vulnerability procedures for historical masonry structural aggregates: Analysis of the historical centre of Castelpoto (South Italy)
No full textIn historical centres, it is very difficult to analyse masonry buildings as independent structures since they have common wall panels with adjacent structural units. These types of building compounds interact with each other under seismic actions, so their behaviour differs from that of individual buildings considered isolated structures. In this framework, multilevel procedures for assessing the vulnerability of masonry building aggregates are examined in the paper and illustrated in detail through the application of a case study in Castelpoto, a municipality of Benevento (Italy). From one side, an index-based evaluation methodology is proposed, appropriately calibrated on the results of the analysis of macroelements on a significant number of grouped buildings, also considering the interactions among adjacent buildings. On the other side, a method based on mechanical analysis is applied at the building scale to evaluate, more realistically, the seismic behaviour of clustered structural units through suitable capacity and fragility assessments
Mechanical disturbances in Fourier spectrometers
No full textFourier spectrometers are sensitive to many kinds of disturbance. This focus is mainly on those connected to mechanical vibrations, assessing the relationships between the mechanical inputs and the deriving effects on the spectra. Mechanical vibrations have two main effects on the spectra, the addition of signals due to direct sensitivity to vibrations of the detectors (e.g., through piezoelectric effect) and the changes of the interferogram due to the interferometer optical components motion. The Fourier transform spectrometer considered in this study is based on the constant optical path step sampling achieved by using the interferogram of a reference laser as a trigger so, ideally insensitive to mirrors speed changes, however, the analysis will show how the effects of delays in the sampling chain can compromise the benefits of this configuration. The effects of the vibration of the interferometer optical alignment are considered as well, showing the effect produced on the interferograms and eventually on the spectra. Despite their nonmechanical nature, detector nonlinearity and internal optical reflections are considered as well because their effects, similar to the mechanical ones, could be confused with the latter while in spectra diagnostic it is often important to be able to distinguish between the two. For all the analyzed effects the quantitative relationships between the mechanical disturbances' amplitudes and spectral observed effects are derived. © 2007 Optical Society of America
Empirical fragility curves of engineered steel and RC residential buildings after Mw 7.3 2017 Sarpol-e-zahab earthquake
No full textThis study investigates the damage data after November 12, 2017, Iran earthquake (Mw 7.3), collected on 440 steel and reinforced concrete residential buildings. Structures have low-to-medium height and are located in Sarpol-e-zahab city, as well as in the west and northwest parts of Kermanshah province, Iran. The peak ground acceleration demands are determined according to data of the micro-shakemap of Sarpol-e-zahab city and the shakemap of Kermanshah province, while the mean values of intensities are determined from the existing empirical relationship between PGA and intensity. The investigated buildings are engineered steel and RC structures nominally erected according to the second and third editions of the Iranian code for earthquake-resistant buildings, but mostly under careless supervision and with low-quality materials. Damage probability matrix, vulnerability index and empirical fragility curves are presented for three subgroups of steel and RC structures on the basis of (i) structural materials and seismic resistant systems (i.e. braced, moment and combination of braced and moment steel frames, as well as moment and combination of moment and shear wall RC frames), without considering the height of structures; (ii) structural materials and height of structures, without considering the seismic resistant systems (i.e. low and medium-height steel and RC structures); (iii) structural materials, without considering the seismic resistant systems and height of structures (i.e. total data for steel and RC frames). The proposed fragility curves are compared with other fragility curves for steel and RC buildings from previous studies. Finally, since this earthquake was the first seismic event in Iran affecting a considerable number of steel and RC engineered buildings, the proposed empirical fragility curves are definitely unique and crucial for realistic damage and vulnerability assessment of similar buildings in future earthquake scenarios, as well as for developing rapid seismic loss assessment after damaging earthquakes
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