322,938 research outputs found
Musmeci, S
No full textScheda sulla figura e l'opera dell'ingegnere Sergio Musmeci e su quattro suoi progetti i cui elaborati sono conservati nelle Collezioni di Architettura del MAXXI di Roma
Impact of the Mediterranean fruit fly (Medfly) Ceratitis capitata on different peach cultivars: The possible role of peach volatile compounds
No full textThe relationship between susceptibility of different peach cultivars (cvs) to the Mediterranean fruit fly (medfly), Ceratitis capitata, and the volatile composition of ripe fruit of each cv has been investigated, since understanding the fruit-insect interaction mechanism is crucial for developing control strategies for such a pest. Volatile compounds were analyzed by SPME-GC-MS in three cvs highly susceptible to medfly attack (Fair Time, Flaminia, Sicilia Piatta), and in two less susceptible cvs (Percoca Romagnola 7 and Doctor Davis). Among the volatile compounds detected, 88 could be identified. The main differences found in the volatile composition of the cvs, concerned the relative abundance of esters. The least susceptible cvs, above all Percoca Romagnola 7, contained the higher amounts of hexenyl, hexyl, 3-methylbutyl, butyl and 2-methylpropyl esters; among these, some C6 derivatives detected, such as (Z)-3-hexenyl acetate, are known to act as priming agents, enhancing plant defence response to insects. Instead, a lower relative content of methyl esters, such as methyl hexanoate and methyl octanoate, known to act as medfly pheromone and attractant respectively, was found in the least susceptible cvs. © 2013 Elsevier Ltd. All rights reserved
Early Form Finding Techniques of Sergio Musmeci revisited
No full textWhile Pier Luigi Nervi (1892-1979) and Riccardo Morandi (1902-1989) are two prominent names in the history of Italian structural engineering, a third, sometimes lesser known, predecessor of modern structural design should be given equal recognition. Sergio Musmeci (1926-1981), once an apprentice to the prior two designers, is noteworthy for his ability to design and construct continuous shells with unprecedented shapes well ahead of his time. He understood the importance of minimizing area while maximizing structural function in shells as early as the 1960’s. Musmeci’s Basento Viaduct in Potenza, Italy was built in 1969, and is a historical example of this structural efficiency. The concrete bridge has four 70 meter spans for a total length of 280 meters. The bridge deck is supported by a 30 cm to 1.2m thick concrete shell surface, the most interesting feature of the bridge, which alternates between convex and concrete curves to form the four arches. What is most intriguing about Musmeci is his understanding and manipulation of physical, numerical and analytical methods of form finding to achieve his design intent. This paper investigates Sergio Musmeci’s previous experience leading to the Basento Viaduct project, analyzes his modeling and testing techniques of the time, and revisits and discusses the shape generation of the three dimensional structural surface structure using contemporary numerical form finding techniques. In addition, this paper aims to provide an example of how revisiting historic structures can influence the design of contemporary and future thin shell bridge structures
Storia e archeologia della media valle del Tammaro: il fiume, gli insediamenti, i paesaggi
No full textAbstract in italiano
Lo studio analizza le trasformazioni territoriali del paesaggio antico nella media valle
del fiume Tammaro. L’area, posta geograficamente nel Sannio, regione montuosa della
fascia appenninica centro-meridionale, si estende a nord-est di Benevento lungo la valle
del Tammaro, affluente del Calore, rientrando nei confini amministrativi dei comuni di
Pago Veiano, Pesco Sannita, Pietrelcina, Reino e San Marco dei Cavoti e, in misura
minore di Fragneto l’Abate, Fragneto Monforte, S. Giorgio la Molara e Paduli.
Il progetto si propone di ricostruire l’evoluzione del paesaggio tra età preistorica ed età
tardoantica analizzando i fenomeni ambientali, i modelli insediativi e le dinamiche di
popolamento che hanno segnato il territorio nel quadro delle vicende storiche umane.
Le metodologie d’indagine adoperate sono state guidate da un approccio globale allo
studio del paesaggio prevedendo tecniche e strategie d’intervento caratterizzate da
apporti multi e interdisciplinari.
Si è creata una solida base di dati archeologici acquisiti dalla bibliografia specialistica e
dalla documentazione archivistica, con il supporto di approfondimenti mirati alle fonti
storiche, alla cartografia storica, alle foto aeree storiche e recenti e alle indagini
geomorfologiche di dettaglio; l’analisi di questa documentazione, sostenuta dalla
creazione di un database relazionale e di un GIS, ha condotto alla definizione di un’area
campione su cui intervenire con l’indagine sistematica sul campo. La ricognizione
archeologica ha consentito di individuare nuove tracce della presenza di gruppi umani,
attraverso il riconoscimento di segni stratificati dei paesaggi antichi e di evidenze
rintracciate in superficie.
Il contributo delle nuove scoperte ha integrato e ampliato la conoscenza pregressa sulla
media valle del Tammaro: mettere in sistema per la prima volta dati noti e nuove
acquisizioni ha permesso di riconsiderare i modelli insediativi, le forme del
popolamento rurale e le dinamiche economiche e sociali di questo comparto del
territorio beneventano in relazione alle principali problematiche storiche.
Abstract in English
This work examines the transformation of ancient human landscape in the middle part
of Tammaro valley. The area is located in Sannio, mountainous region of central and
southern Appenines, precisely in the north-east territory of Benevento, near the
Tammaro river, which is tributary of Calore. The research area includes the territories of
Pago Veiano, Pesco Sannita, Pietrelcina, Reino and San Marco dei Cavoti and to a
lesser extent Fragneto l’Abate, Fragneto Monforte, S. Giorgio la Molara and Paduli.
The aim of this research project is to study the evolution of landscape from Prehistory
up to the Late Antiquity, through a better understanding of environmental processes,
local settlement patterns and changing population dynamics in the historical framework.
The adopted methodologies have been inspired by a global approach to landscape as a
palimpset of ancient human traces, following the way of multi-disciplinary techniques
and strategies integrating different competences.
It’s been created a collection of previous archaeological data knonw from
bibliographical and archival documents that is improved by studies of literary sources,
written documents, cartographic sources including historical maps, aerial photographs
and systematic geological and geomorphological analysis of the geographic area. All
the informations are entered into a database and managed by a Geographical
Information System which helped to define the sampling areas to survey.
The archeaeological systematic survey allowed us to find new traces of ancient
communities, signed by stratified evidences of ancient landscapes and by surface
scatters of artifacts and sherds.
The new finds improved the previous knowledge of Tammaro middle valley, relating
for the first time the old archaeological available data with the new results and defining
the changes in the landscape pattern, the forms of rural occupation and the evolution of
social and economic structures in the countryside of Benevento within most important
historical issue
FATTO AD ARTE PER IL PAESAGGIO: IL VIADOTTO DI MUSMECI
No full textIl testo indaga la costruzione del cavalcavia firmato da Sergio Musmeci. Il sovrappasso della regina viarum deve rilegare via
Marco Polo e via Cilicia. Musmeci offre in dono al
comune il progetto di un viadotto inusuale, che non fa
ricorso alle geometrie convenzionali, ma propone una
forma plastica, moderna e audace, che non si sottrae
al confronto con i manufatti antichi, che costellano
l’Appia. Il progetto non prende le mosse dal piano
strada della nuova infrastruttura, ma guarda in primo
luogo alle caratteristiche del terreno sottostante.
Paradossalmente è quanto viene sovrappassato a
dettare la morfologia del cavalcavia, che privilegia il
ruolo di protezione e di valorizzazione delle vestigia
romane sottostanti. Sotto il profilo strettamente
tecnico il cavalcavia non è complesso: deve superare
due luci rispettivamente di 41,82 m per sovrappassare
la strada e circa 20 m per la campata minore, ma la soluzione sarà unica e inusuale
Draft genome sequence of the mucin degrader clostridium tertium wc0709
No full textThe draft genome sequence of Clostridium tertium WC0709, a gut bacterium able to use mucin in pure culture as the sole carbon and nitrogen source, is presented here. The genome sequence of C. tertium will provide valuable references for comparative genome analysis and for studying the relationship with the host
Palms (Phoenix canariensis) infested by red PALM weevil (Rhynchophorus ferrugineus Olivier): Insecticidal efficacy tests of chipping treatment
No full textThe provision n° A6505/29-11-2010 of the Lazio Region Agricultural Department states that the plant material resulting from the felling of palms infested by RPW (Rhynchophorus ferrugineus Olivier) must be disinfested by heat treatment or fine mechanical chipping, ensuring that the resulting materials obtained are of a size smaller than 2 cm. This paper describes changes made on one machine chipper FARMI mod. FOREST CH260 for use in the cutting of trees and palm leaves in accordance with the above mentioned provision. The analyzes carried out on the plant material shredded, according to methodology UNI CEN/TS 15149-1 - 2006, show that 94,78% of the fragments is smaller than 16 mm and a water content of 52.5%. In all fragments of the material shredded at least one of the three dimensions was less than 2 cm. A mix of chipped stipes and leaves of palm tree was tested at ENEA facilities to evaluate the ability of RPW larvae to feed and survive on this substrate. Ten plastic containers (130 liters) were filled up with 26 kg each of chipped matter and infested with larvae grouped by weight into 3 classes ranged from 0.35 g till 2 cm (3 containers for each class and 1 as control; 30 larvae for each container). Containers, covered with a metallic net, were kept in an isolated chamber, controlling temperature in order to maintain the substrate around 30°C. The substrate was inspected at 45 dd after infestation. No survival was recorded on the larvae, indicating that chipping technique could be a suitable method to destroy infested palm avoiding potential risks of re-infestation from the disposal sites. © 2013, Copyright G. Sperandio et al
Introgressione in cultivar di patata di fonti di resistenza a dorifora, Leptinotarsa decemlineata Say, e tignola, Phthorimaea operculella (Zeller), derivanti da germoplasma selvatico (Solanum pinnatisectum Dun., S. berthaultii Hawkes).
No full textIdentification of mucin degraders of the human gut microbiota
No full textMucins are large glycoproteins consisting of approximately 80% of hetero-oligosaccharides. Gut mucin degraders of healthy subjects were investigated, through a culture dependent and independent approach. The faeces of five healthy adults were subjected to three steps of anaerobic enrichment in a medium with sole mucins as carbon and nitrogen sources. The bacterial community was compared before and after the enrichment by 16S rRNA gene profiling. Bacteria capable of fermenting sugars, such as Anaerotruncus, Holdemania, and Enterococcaceae likely took advantage of the carbohydrate chains. Escherichia coli and Enterobacteriaceae, Peptococcales, the Coriobacteriale Eggerthella, and a variety of Clostridia such as Oscillospiraceae, Anaerotruncus, and Lachnoclostridium, significantly increased and likely participated to the degradation of the protein backbone of mucin. The affinity of E. coli and Enterobacteriaceae for mucin may facilitate the access to the gut mucosa, promoting gut barrier damage and triggering systemic inflammatory responses. Only three species of strict anaerobes able to grow on mucin were isolated from the enrichments of five different microbiota: Clostridium disporicum, Clostridium tertium, and Paraclostridium benzoelyticum. The limited number of species isolated confirms that in the gut the degradation of these glycoproteins results from cooperation and cross-feeding among several species exhibiting different metabolic capabilities
Generalized Thrust Network Analysis of Triangular Masonry Cross Vaults Inspired by Musmeci
No full textA triangular parabolic cross vault, that was designed by Musmeci in the 1950s as a reinforced concrete structure but remained unbuilt, is revisited from the original perspective of its reinvention as a masonry structure. In the framework of static limit analysis under classical Heyman’s assumptions, a generalized thrust network analysis is adopted for a structural safety assessment. The performances of the vault, subject to its self-weight, are investigated through minimum-thrust and minimum-thickness analyses by conforming to the original geometry and assuming the vault thickness as the only design parameter. Further insight is achieved by exploring a more general class of triangular parabolic masonry cross vaults, whose rise-to-span ratio is an additional design parameter. The static efficiency of the smart and unconventional geometry proposed by Musmeci is thus proven, motivating the possibility of bringing it to new life in the form of a masonry structure
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