1,721,173 research outputs found
SEISMIC VULNERABILITY ASSESSMENT OF A 17TH CENTURY NEAPOLITAN FARM
Full text linkIn this paper, seismic vulnerability appraisement, restoration, and consolidation plan of a 17th century masonry building (Rossi farm) with cultural and artistic value located in a small city near Naples are reported and discussed. This case study is presented and described, providing historical data and information about its actual conditions, spaces, functions and structures. Once the crack pattern detected in the building has been appropriately traced, the knowledge is deepened by performing all the three seismic risk assessment analyses proposed by the “Italian Guidelines for the assessment and reduction of seismic risk of cultural heritage". The first evaluation level is a qualitative and simplified tool allowing for the knowledge of the risk level of the building under study. Afterwards, the structure has been subjected to more accurate investigations dealing with its local mechanisms and global behaviour in the second and the third evaluation levels, respectively. In all three analysis phases, the results have shown the high vulnerability of the masonry farm. Based on these results, a consolidation plan, according to the Cultural Heritage Italian Guidelines suggestions, has been proposed
Seismic vulnerability assessment and consolidation techniques of ancient masonry buildings: The case study of a Neapolitan Masseria
No full textIn this paper, the seismic vulnerability appraisement, together with repairing and consolidation operations, of a masonry building with cultural and artistic value located in a small city near Naples are reported and discussed. After a brief digression about the condition of historical and cultural Italian heritage damaged by seismic events and usually in poor condition due to a lack of maintenance, the case study is presented and described, providing not only historical news but also information about as-built status, spaces, functions and structural issues. Once the principal failure modes affecting the building are identified, the estimation of seismic vulnerability is performed through three different evaluation levels given by the Italian Guidelines on Cultural Heritage. The analysis results, compared to each other, have shown the problems and the high vulnerability degree of the building. Finally, according to the Italian Guidelines, the consolidation and upgrading interventions are proposed and described to ensure a safety use of the Masseria under seismic actions
Partially scattered linearized polynomials and rank metric codes
No full textA linearized polynomial f(x)∈Fqjavax.xml.bind.JAXBElement@26b9a41a[x] is called scattered if for any y,z∈Fqjavax.xml.bind.JAXBElement@43507877, the condition zf(y)−yf(z)=0 implies that y and z are Fq-linearly dependent. In this paper two generalizations of the notion of a scattered linearized polynomial are provided and investigated. Let t be a nontrivial positive divisor of n. By weakening the property defining a scattered linearized polynomial, L-qt-partially scattered and R-qt-partially scattered linearized polynomials are introduced in such a way that the scattered linearized polynomials are precisely those which are both L-qt- and R-qt-partially scattered. Also, connections between partially scattered polynomials, linear sets and rank metric codes are exhibited
Linear sets and MRD-codes arising from a class of scattered linearized polynomials
Full text linkA class of scattered linearized polynomials covering infinitely many field extensions is exhibited. More precisely, the q-polynomial over F_(q^6), q≡1(mod4) described in Bartoli et al. (ARS Math Contemp 19:125–145, 2020) and Zanella and Zullo (Discrete Math 343:111800, 2020) is generalized for any even n≥ 6 to an Fq-linear automorphism ψ(x) of Fqn of order n. Such ψ(x) and some functional powers of it are proved to be scattered. In particular, this provides new maximum scattered linear sets of the projective line PG(1,qn) for n= 8 , 10. The polynomials described in this paper lead to a new infinite family of MRD-codes in Fqn×n with minimum distance n- 1 for any odd q if n≡0(mod4) and any q≡1(mod4) if n≡2(mod4)
(d, σ) -Veronese variety and some applications
Full text linkLet K be the Galois field of order q^t , A = Aut(K) be the automorphism group of K and σ = (σ0, . . . , σd−1) in A^d , d ≥ 1. In this paper the following
generalization of the Veronese map is studied:
νd,σ : 〈v〉 ∈ PG(n − 1, K) −→ 〈v ^σ0 ⊗ v^ σ1 ⊗ · · · ⊗ v^ σd−1 〉 ∈ PG(n d − 1, K).
Its image will be called the (d, σ )-Veronese variety Vd,σ . We will show that Vd,σ is the Grassmann embedding of a normal rational
scroll and any d + 1 points of it are linearly independent. We give a characterization of d + 2
linearly dependent points of Vd,σ and for some choices of parameters, Vp,σ is the normal
rational curve; for p = 2, it can be the Segre’s arc of PG(3, q^t ); for p = 3 Vp,σ can be also a
|Vp,σ |-track of PG(5, q^t ). Finally, investigate the link between such points sets and a linear
code Cd,σ that can be associated to the variety, obtaining examples of MDS and almost MDS codes
Seismic Vulnerability Assessment of Churches Affected by the 2012 Emilia - Romagna Earthquake: Comparison among Different Approaches
No full textThis paper discusses the seismic assessment of a set of 23 churches placed in the city of Bondeno (district of Ferrara) within the Emilia - Romagna region of Italy. The churches analysed were hit by the 2012 earthquake, which caused many victims and damages to both industrial and historical structures. Specifically, the contribution is about a comparison among three damage indices derived from three different approaches and methods of analysis. The first index resulted from the application of a simplified mechanical model proposed by the Italian Guidelines for Cultural Heritage (IGCH). The second damage indicator was derived from the direct observation of the damaged churches from filling the AeDES form used in the earthquake post-emergency phase. Finally, the last damage parameter came from the kinematic analyses applied to the different church macro-elements aimed at evaluating the accelerations activating the local mechanisms. The final goal of the comparison is to evaluate the reliability of the simplified mechanical model and whether it could be used for a quick estimation of the damage to churches affected by seismic events. The geometrical information about the type of system (i.e. with rectangular or central layout), the construction period and the structural properties (i.e. materials used for vertical and horizontal structures) were achieved through filling the CARTIS form appropriately conceived by the PLINIVS research centre and the Italian Civil Protection Department for typological-structural characterization of these construction type. The comparison among the three indices was herein conducted through the modelling of a case study, on which kinematic analyses based on the available data were carried out. The achieved results gave positive results on the use of the easy method to foresee the church damages, even if further analyses must be done to validate its reliability
Integrated seismic-energy retrofit systems for preventing failure of a historical RC school building: Comparison among metal lightweight exoskeleton solutions
No full textItalian built heritage is highly vulnerable due to old public and private buildings designed without recent seismic and energy regulations. In particular, school buildings represent a critical typology that should be retrofitted to guarantee safety and comfort to the users. In this framework, interventions from building outside able to avoid interruption of school activities should be required. A solution to solve this issue can be found in the retrofit solution with exoskeletons. In this scenario, the paper presents the comparison among three similar solutions of metal lightweight exoskeletons for the integrated seismic-energy retrofit of a RC school building assumed as a case study. The RC structure of the school is firstly modelled with a finite element software and then subjected to pushover analysis before and after retrofit interventions to assess the benefit of each exoskeleton solution. The comparisons among intervention techniques are made in terms of the seismic safety index (ζE) provided by the Italian technical standard. The results show the more or less efficacy of the different inspected systems, even if integrative local interventions are needed to reach the minimum safety index (0.60) required for school buildings. As a conclusion, these novel light metal exoskeletons have proven to be efficient retrofitting systems for residential buildings or even for school buildings with regular façades and plan layouts
AndreaCeolin/FormalSyntax: Ceolin, A., Guardiano, C., Irimia, M. A., & Longobardi, G. (2020). Formal syntax and deep history - Supplementary Material. Frontiers in Psychology, 11, 2384.
No full textThis is the first release of the Supplementary Material of the article.
Ceolin, A., Guardiano, C., Irimia, M. A., & Longobardi, G. (2020). Formal syntax and deep history. Frontiers in Psychology, 11, 2384.
It only differs from the previous version in having a DOI from Zenodo
Tra geografia e storia
No full textScopo di questo saggio è quello di indagare le trasformazioni dei paesaggi urbani e rurali negli ultimi decenni, con una specifica attenzione ai fenomeni di sprawl e consumo di suolo nel quadrante orientale del Comune di Roma.
Una questione importante riguarda i confini tra città e campagna, che nel primo Novecento rimarcavano varie e variabili “frontiere dell’urbano” definite da specifici regimi amministrativi giuridici e fiscali.
Da questo punto di vista, alcune elaborazioni cartografiche consentono di gettare una luce sui modelli insediativi, le discontinuità dell’urbano, gli usi e le modalità di appropriazione della terra.
Ad oggi, la condizione di “frangia urbana” coinvolge porzioni sempre più ampie di territorio in cui il suburbio entra in contatto con lembi di paesaggio agricolo e naturale ponendo la questione del governo del territorio in termini che vanno ben oltre la semplice definizione ex-ante delle sue regole di assetto.
La nuova stagione di governance è chiamata a incorporare nel dominio della “Forma urbana” principi ecologici che siano in grado di assicurare alle future generazioni la tutela dei paesaggi e la rigenerazione delle risorse ambientali.The aim of this essay is to investigate transformations of urban and rural landscapes all along the last decades, and to draw a specific attention to the phenomena of sprawl and land consumption in the eastern area of the Municipality of Rome..
A major issue is the question of boundaries between city and country, which in past times clearly marked a distinction between land use regulations, and more generally between different juridical, administrative and fiscal traditions ruling in towns and countries.
From this point of view, some maps set up all along the XX Century cast a light on previous landscape patterns and put in evidence the principal phases of discontinuity in spatial settings, uses and ways of appropriation of land.
At present, the condition of “urban fringe” involves more and more large portions of territory in which suburbs are melted with agricultural and natural landscapes, so that both theories and practices of planning and urban design seem to overcome the idea of implementation as a mere question of “conformance” to a priori spatial rules.
The new season of governance is called to incorporate within the domain of “urban Form” ecological principles as to ensure to future generations landscape protection and regeneration of environmental resources
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