1,521 research outputs found
Transmitter optimization and theoretical bounds for dispersion-limited optical fiber links
No full text
Masterplan for the historical center of Viterbo
No full textIn 2016 the Municipality of Viterbo commissioned to the Sapienza department DiAP the drafting of a Masterplan for the historic center of Viterbo. The scientific director of the Masterplan, Orazio Carpenzano, together with his team (Raitano, Marcoaldi, Balducci, Bigiotti, Fiorelli, Montori) intervened using a consolidated methodology, based on a thirty year experience in historic centers planning, ideally started by Raffaele Panella with the plan for Città di Castello (Carpenzano, 1993). The first step was to involve a group of several local experts, establishing a scientific committee composed entirely of prominent figures rooted in the territory. The second contribution, which was decisive for consolidating the theoretical assumptions of this collective work, came from the local community through individual citizens and sector categories. Two different ways allowed a continuous interaction between strategic planning and DiAP’s purpose to design the city through architecture. The first method concerned the construction of an abacus of possible interventions on the historical center, applicable to buildings in a more or less invasive way in relation to the quality of the existing urban fabric. The second interaction strategy between Masterplan and architecture tried to verify the contents of the thematic plans, through an international architectural design workshop. In all the different design strategies, the new fits into the old without any formal or semantic ambiguity. Integration, if necessary, does not deny current temporality, but adapts itself to the needs and expectations of contemporary living
Patterson selectivity by modulation-enhanced diffraction
No full textModulation excitation spectroscopy is a powerful and well established technique for investigating the dynamic behaviour of chemical and physical systems. Recently, an expansion of this technique for diffraction was proposed and the theory deriving the diffraction response of a crystal subjected to a periodically varying external perturbation was developed [Chernyshov, van Beek, Emerich, Milanesio, Urakawa, Viterbo, Palin & Caliandro (2011). Acta Cryst. A67, 327335]. The result of this is that a substructure composed of atoms actively responding to the stimulus may be separated out by analysing the diffraction signal at a frequency twice that of the stimulus. This technique is called modulation-enhanced diffraction. Here, a version of the theory dealing with the modulation of the site occupancies of a selected subset of atoms is formulated, and this is supported by experiments carried out at the Swiss-Norwegian Beam Lines at the ESRF, involving periodic variation of the xenon content of a polycrystalline zeolite as a function of temperature. The data analysis involves three steps: (i) data selection is carried out to mimic a linear response; (ii) phase-sensitive detection is applied to obtain contributions both from the responding part of the electron density associated with the Xe atoms and from the interference term; (iii) a phasing procedure is applied to both. A Patterson deconvolution technique has been successfully used to phase the demodulated diffraction patterns and obtain the active substructure
Hydrogeology of thermal waters in Viterbo area, central Italy
No full textA conceptual hydrogeological model of the Viterbo thermal area (central Italy) has been developed. Though numerous studies have been conducted on its geological, geochemical and geothermal features, there is no generalized picture defining the origin and yield of the hydrothermal system. These latter aspects have therefore become the objectives of this research, which is based on new hydrogeological and geochemical investigations. The geological setting results in the coexistence of overlapped interacting aquifers. The shallow volcanic aquifer, characterized by fresh waters, is fed from the area around the Cimini Mountains and is limited at its base by the semiconfining marly-calcareous-arenaceous complex and low-permeability clays. To the west of Viterbo, vertical upflows of thermal waters of the sulphate-chloridealkaline- earth type with higher gas contents, are due to the locally uplifted carbonate reservoir, the reduced thickness of the semiconfining layer and the high local geothermal gradient. The hot waters (30–60°C) are the result of deep circulation within the carbonate rocks (0.5–1.8 km) and have the same recharge area as the volcanic aquifer. The upward flow in the Viterbo thermal area is at least 0.1 m3/s. This flow feeds springs and deep wells, also recharging the volcanic aquifer from below
Bisogni primari della persona e disciplina condominiale dopo la l. n. 220 del 2012
No full textNegli ultimi decenni la proprietà condominiale si è profondamente trasformata ed evoluta ed il sistema ordinamentale ha cercato di adeguarsi con la riforma introdotta dalla l. n. 220/12. Si propone una riflessione sulle nuove norme del Codice civile che pongono il problema del bilanciamento tra la tutela della proprietà e la necessità di tutela degli interessi umani connessi all’abitare e alla fruizione di beni e servizi comuni. L’analisi si indirizza sull’àmbito dei poteri dell’assemblea e dei singoli condomini in merito all’abbattimento delle barriere architettoniche, all’installazione di sistemi di videosorveglianza, al possesso di animali domestici e ad altri bisogni primari della persona. La disciplina vigente dei rapporti di condominio attende ancora di essere compiutamente attuata a salvaguardia dei fondamentali diritti delle persone che a vario titolo vi partecipano.
In recent decades, condominium models have been transformed and evolved and the legal system has tried to adapt to this, through the reform introduced by l. n. 220/2012. The Author remarks are addressed on the new Civil code provisions that raise the problem of the balancing test between estate ownership protection and the need for human interests protection related to housing and to fruition of common goods and services. The analysis focuses on the individual owners rights about removing “architectural barriers”, installing video-surveillance systems, cohabiting with pets and other personality basic needs. The current provisions on condominium relationships are still waiting to be fully implemented to safeguard fundamental personality rights
- …
