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Institutionalizing Metropolitan cities in Italy. Success and limits of a centralistic, simplifying approach
No full textItinerario nell'arte (Quarta edizione), Dal Gotico Internazionale al Manierismo (Versione Gialla)
No full textManuale di Storia dell'arte a uso della scuola secondaria superior
Future challenges in evaluating and managing sustainable development in the built environment,
No full textFuture Challenges in Sustainable Development within the Built Environment stimulates and reinterprets the demands of Responsible and Sustainable Development in the Built Environment for future action and development. It examines the methods of evaluation, the use of technology, the creation of new models and the role of human factors for examining and developing the subject over the next twenty years
Seveso Directives and LUP: The mutual influence of natural and anthropic impacts
No full textThe Seveso accidents and the subsequent european regulations raised the attention to the land use planning around major risk installations. In the last decades, moreover, the problem of the technological accidents induced by natural disruptive events (Na-tech) acquired an increasing relevance; although several methodologies to assess this kind of risk were developed, their adoption is still not explicitly requested in the regulations, neither related to major risk installations.The Na-tech related methodologies developed so far are mainly devoted to the control of risk from the plant and equipment point of view, while they don't take into account the mutual influence of natural and anthropic impacts on a territory.This paper, thus, starting from the example of Piedmont and Turin guidelines for L.U.P., proposes some actions and a list of preventive and protective measures which could be implemented in the regulations (from supranational to local ones) to constitute a "passive protection" against the technological accidents impacts, also ensuring an increased protection for the environment.The issue of the new national guidelines related to the national implementation of Seveso III directive could open perspectives to introduce a major attention to Na-tech events, at least as far as it concerns their prevention and mitigation
Non-linear i-vector transformations for PLDA based speaker recognition
No full textThis paper proposes to estimate parametric nonlinear transformations of i-vectors for speaker recognition systems based on Probabilistic Linear Discriminant Analysis (PLDA) classification. The Gaussian PLDA model assumes that the i-vectors are distributed according to the standard normal distribution. However it has been shown that the i-vectors are better modeled, for example, by Heavy-Tailed distributions, and that significant improvement of the classification performance can be obtained by whitening and length normalizing the i-vectors. In this work we propose to transform the i-vectors so that their distribution becomes more suitable to discriminate speakers using the PLDA model. This is performed by means of a sequence of affine and non-linear transformations whose parameters are obtained by Maximum Likelihood (ML) estimation on the development set. Another contribution of this work is the reduction of the mismatch between the development and evaluation i-vector length distributions by means of a scaling factor tuned for the estimated i-vector distribution, rather than by means of a blind length normalization. Relative improvement between 7% and 14% of the Detection Cost Function was obtained with the proposed technique on the NIST SRE-2010 and SRE-2012 evaluation datasets, using both the traditional GMM/UBM and the hybrid DNN/GMM based systems
An innovative bio-engineering retaining structure for supporting unstable soil
No full textThe paper presents a new prefabricated bio-engineering structure for the support of unstable soil. This prefabricated structure is made of a steel frame which is completely filled with soil and a face made of tree trunks among which scions or autochthonous bushes are planted. Due to the difficulties in interpreting the complex interaction between soil and structure during the installation and lifetime, an in situ test was carried out in order to evaluate the state of stress in the steel frame and to understand the global behavior of the structure under service loads. On the basis of the obtained results, a procedure for checking the structure safety was proposed and discussed. An easy design method was developed during the research. Moreover, the use of this type of prefabricated structure shows several advantages, such as good performances in terms of stabilizing effects, and easy assembly and transport
Photon Management Assisted by Surface Waves on Photonic Crystals
No full textThis book illustrates original pathways to manipulate light at the nanoscale by means of surface electromagnetic waves (here, Bloch surface waves, BSWs) on planar dielectric multilayers, also known as one-dimensional photonic crystals. This approach is particularly valuable as it represents an effective alternative to the widely exploited surface plasmon paradigm. After a brief overview on the fundamentals of BSWs, several significant applications of BSW-sustaining structures are described. Particular consideration is given to the propagation, guiding, and diffraction of BSW-coupled radiation. Further, the interaction of organic emitters with BSWs on planar and corrugated multilayers is investigated, including fluorescence beaming in free space. To provide greater insight into sensing applications, an illustrative example of fluorescent microarray-based detection is presented. The book is intended for scientists and researchers working on photon management opportunities in fields such as biosensing, optical circuitry, and lighting
Development of an innovative design of a composite-sandwich based vehicle roof structure
No full textObligatory standards are dictated to vehicle manufacturers for decreasing the high number of road dead tolls in rollover crashes; at the same time demands to produce light-weight vehicles have increased substantially to reduce the toxic gases emission. This paper presents a new design of the roof strengthening configuration in which sandwich material has been used. This type of configuration improves the energy absorption capacity of the vehicle roof system and dissipates impact energy in a controlled manner. In reality, carrying out roof crush test is not cost effective, thus numerical analysis of vehicle roof crush test has been performed according to standard FMVSS 216 test. Sandwich structures with unidirectional carbon/epoxy composite face-sheets and Expanded Polypropylene (EPP) foam core have been used to model different configurations for vehicle roof structure. The effects of increasing the foam core density and face-sheets thickness on the energy absorption and strength-to-weight ratio (SWR) of vehicle roof structure have been investigated. Results revealed that, the optimized sandwich solution type 6 with the face sheets thickness of 0.8 mm and foam core of 70 kg/m3 density reduces the vehicle roof panel mass by 68% while it has almost the same structural performance with the steel solution having equal value of SWR