1,720,961 research outputs found
A survey of ancient geotechnical engineering techniques in subfoundation preparation
No full textThe paper presents an overview of a particular type of construction techniques relating with foundation engineering in antiquity: the subfoundation preparation practices employed in many ancient monuments for dealing with hydrogeological and seismic hazards. The purpose is to illustrate and discuss a number of technological achievements in the ancient world and provide a significant insight into the geotechnical skills of ancient architects and builders. The case studies here presented aim to give evidence that, under certain cultural and environmental conditions, ancient societies acquired an awareness of the risks linked to the earth phenomena that led to the development of geotechnical engineering techniques, sophisticated even by modern standards. Several examples show a clear understanding of some basic principles of foundation engineering, such as the need to keep the soil moisture content under control and to assure an uniformly distribution of the building loads. This survey is focused on Greek and Near East cultures ranging from Bronze Age to classical times and extending over an area from southern Italy to ancient Mesopotamia. The analysis includes some of the most imposing monuments of antiquity, such as the fortification walls of Troy and the colossal archaic temple of Artemis at Ephesus – known in antiquity as one of the Seven Won-ders of the World - besides examples of remarkable foundation systems from lesser known archaeological sites like the Greek colonies on the north coast of the Black Sea
Evaluation of the structural health status of the coverings of Villa dei Misteri in Pompeii
No full textVilla dei Misteri is one of the most visited monuments of the archaeological area of Pompeii. It is sited just outside the excavations and take is name from the superb frescoes depicting ritual mysteries. The ancient masonry structures, dating from the third century B.C. to the Vesuvian eruption, are protected from weathering by modern roofs built in various materials (reinforced concrete, timber, steel). After the collapse, in the fall of 2012, of a decayed timber joist, the Superintendence decided to carry out, in collaboration with ENEA, a detailed survey of all the covering structures to evaluate its health status and assess the safety condition of the monument. This paper illustrates the research methodology developed, which is based on a multidisciplinary approach including historical research, geometrical and structural surveys, damage assessment based on both in situ and laboratory diagnostic tests, UAV (Unmanned Aerial Vehicles) remote sensing to inspect area and coverings not easy to reach in safe, and, as basis for seismic safety assessment, ambient vibration measurement to characterize the dynamic response of the soil and of the most relevant structural components of the Villa. The preliminary results of the first stage of the diagnostic campaign are also presented
Valutazione della sicurezza sismica degli edifici M95 ed M99 Centro Ricerche Brasimone e proposte di intervento
No full textCon riferimento al Prot. ENEA/2016/1750/ISER e successivi, il presente Rapporto Tecnico costituisce uno studio finalizzato alla valutazione dello stato di sicurezza sismica degli Edifici M95 ed M99 del Centro Ricerche ENEA Brasimone e al suggerimento di possibili proposte di intervento
Analisi di campioni di terreno provenienti da scavi archeologici nell'area sacra di Torre Argentina a Roma
No full textIl presente rapporto descrive le analisi preliminari effettuate nell’ambito della collaborazione tra ENEA e la Soprintendenza Capitolina ai Beni Culturali del Comune di Roma - al momento in corso di definizione - finalizzata alla definizione dei processi di formazione di alcune stratificazioni archeologiche del complesso monumentale conosciuto come Area sacra di Largo di Torre Argentina. In particolare, le analisi hanno lo scopo di dare indicazioni utili alle indagini che mirano a stabilire se il rilevato su cui, in età repubblicana, fu rialzato il piano di calpestio dell’area, fu di origine antropica, in conseguenza di un incendio, o di natura alluvionale e quindi da mettere in relazione con una possibile esondazione del Tevere in età romana
Relazione di Sopralluogo Edifici M95 ed M99 Centro Ricerche Brasimone
No full textIl presente Rapporto Tecnico costuisce quanto inviato dal Responsabile ISPREV (prot. ENEA/2015/39083/SSPT-MET-ISPREV 07/07/2015) in risposta alla richiesta pervenuta dalla Direzione di Centro BRA (prot. ENEA/2015/13778/BRA 05/03/2015 e ENEA/2015/14423/UTSISM 09/03/2015)
Messa in sicurezza post-sisma della parrocchia della Visitazione di Maria Santissima a Reno Finalese (MO)
Full text linkA seguito degli eventi sismici del 20 e 29 Maggio 2012, che hanno coinvolto una vasta parte del territorio dell'Emilia (la parte occidentale della Regione Emilia-Romagna), l'ENEA è stata coinvolta nelle operazioni di verifica di agibilità e di interventi per la messa in sicurezza post-sisma sulle varie tipologie costruttive esistenti sul territorio. Questo documento si focalizza sugli edifici di interesse artistico e culturale. Dopo l'evento sismico, molte Chiese e palazzi storici hanno subito danni significativi. Alcuni di questi hanno subito danni devastanti e permanenti, altri possono essere ripristinati grazie ad immediati interventi per la messa in sicurezza seguiti da interventi specifici. Gli interventi di messa in sicurezza rivestono un ruolo importante poiché preservano la costruzione storica da un peggioramento del danno. L'esempio presentato di seguito, riguarda la Chiesa della Visitazione di Maria Santissima a
Reno Finalese (Modena). ENEA ha proposto un intervento di messa in sicurezza sicurezza, che è stato approvato dalla Direzione Regionale per i Beni Culturali e Paesaggistici dell'Emilia-Romagna.Following the earthquakes of May 20th and 29th,2012, which involved an extensive part of Emilia territory (the Western part of Emilia–Romagna), ENEA has been involved in the operations of usability testing and post-earthquake safety interventions on the various construction typologies existing on the territory. This paper is focused on cultural and artistic interest constructions, only. After the seismic event, many churches and historic buildings have suffered significant damage. Some of these have undergone devastating and permanent damage. Others can be restored if immediate safety interventions will be realized before carring out the appropriate retrofitting interventions, in order to preserve the historical construction from worsening the damage. The example presented below, concerns the
Visitazione di Maria Santissima Church in Reno Finalese (Modena). ENEA proposed a safety intervention, which has been approved by the Regional Directorate for Cultural Heritage and Landscape in Emilia-Romagna
A methodology for the safety assessment of protective roofs covering archaeological sites: the case of the Villa dei Misteri at Pompeii
No full textPompeii is the largest archaeological site in the world and one of the most visited as well. Villa dei Misteri is a great suburban villa just outside the ancient city. Every year, thousands of visitors are attracted by the superb frescoes from which the domus takes its name. In the course of excavations, the most significant rooms were roofed with the dual purpose of providing weather protection and returning the monument to its ancient state. The results of the restoring interventions display a wide range of roof structure typologies: reinforced concrete frame, reinforced concrete tiles mixed floor, timber and steel frame. The evaluation of their health status requires a detailed study by means of a multidisciplinary approach, which should include historical research, geometrical and structural surveys, damage assessment based on both in situ and laboratory diagnostic tests, UAV (Unmanned Aerial Vehicles) remote sensing to inspect area and coverings not easy to reach in safe, and, as basis for seismic safety assessment, ambient vibration measurement (discussed in a separate paper). In this paper the preliminary results of the survey are presented. In particular, the main causes of decaying have been identified and preventive measures to reduce risk of damage have been suggested. Furthermore, considering that the described methodology has been developed also with the aim to qualify a standard procedure in view of further applications to similar roofing typologies, very common in the archaeological site of Pompeii, a more detailed diagnostic campaign has been planned in order to gather adequate data for a comprehensive safety assessment including seismic vulnerability analysis
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
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