Search results for " Ferro"
showing 10 items of 499 documents
Image analysis for detecting aggregate gradation in asphalt mixture from planar images
2012
Abstract The mechanical properties of bituminous mixture strongly depend on the gradation of the aggregate that represents the mineral skeleton of the mixture, since for open and gap-graded mixtures, stresses due to vehicles in movement on the pavement are mainly transmitted through their contacts. Internal structure of bituminous mixture is, therefore, of great interest for road and infrastructure engineering and it is appropriate to study it with recently developed image analysis method. The purpose of this study was to finalize an effective analysis of asphalt section image for automatically extracting aggregate gradation without the need of separation of the bitumen from the aggregate. …
Valuing the effects of urban road-network projects: a methodological proposal
2006
This paper proposes a methodology for the valuation of the urban environment. It tries to answer questions and problems that derive from new road installations, or functional requalifications in existing road infrastructures, in accordance with specific practices already well-known as Urban Impact Assessment (UIA). More generally, the objective of the urban impact assessment consists of valuing the possibilities to localize urban installations, also considering both their economic and social effects, as well as identifying potential dangers to the environment, intended in a general sense. This kind of valuation distinguishes from the traditional environmental impact valuation (e.g., applied…
Déréglementation, sécurité et prévision d’accidents extrêmes : le cas du fret ferroviaire français
2010
The deregulation of rail freight has been considered, for long time, as a factor of safety reduction. This article aims to show that, for the moment, one cannot consider that deregulation of rail freight has a significant negative impact on safety in France. Following KJELLÉN (2000), we looked if it's possible to know the periodicity of extreme accidents in this sector.
A novel high-spin heterometallic Ni12K4cluster incorporating large Ni–azide circles and an in situ cyanomethylated di-2-pyridyl ketone
2005
Reaction of di-2-pyridyl ketone (dpk) with nickel acetate and azide in the presence of potassium tert-butylate as a catalytic base generates the title compound, which contains the largest [Ni(m1,1-N3)]6 circles in the discrete ferromagnetically-coupled MII–azide cluster family, and shows an unprecedented in situ cyanomethylation of ketone. Clemente Juan, Juan Modesto, Juan.M.Clemente@uv.es
L’infrastruttura scomparsa. Il nuovo suolo della stazione Alta Velocità La Sagrera a Barcellona
2017
L’enorme progetto appena completato a Barcellona per il nuovo polo ferroviario della stazione Sagrera si caratterizza soprattutto per il legame fra la nuova stazione dell’Alta Velocità (AVE) e il vasto parco lineare, progetto opera di West 8, che copre la lunga trincea un tempo determinata nel tessuto urbano dai binari preesistenti. Ricostruendo il quadro di uno dei più grandi e ambiziosi progetti di rigenerazione urbana legati all’infrastruttura ferroviaria oggi in Europa, questo articolo si concentra sulla subordinazione della stazione al parco. Non si tratta di una semplice condizione di posizione (la stazione è letteralmente sotto il parco), ma di una nuova e sempre più diffusa condizio…
Modelling pavement surface characteristics for noise prediction through Bailey-related indicators
2021
The aggregate gradation of bituminous mixtures (hot mix asphalts, HMA) is one of the major factors affecting their surface texture. In turn, this latter is a crucial factor and influences drivers and bystanders’ safety, comfort, and health. Despite this, the design of texture levels still lacks sound bases and dedicated algorithms and this negatively affects the acoustic design of bituminous mixtures. Consequently, the objectives of this study were confined into the derivation of relationships to be used in mix design to predict texture levels. Experimental data were analyzed, in the pursuit of setting up appropriate models and algorithms. Analyses involved the consideration of Bailey-relat…
Détour topologique Les opérations TAV italiennes et la redéfinition architecturale des gares
2010
Aujourd’hui convoquées en Europe comme catalyseurs de transformations urbaines, les gares se posent comme condition pour fabriquer la ville dans des opérations reliant la modernisation du réseau ferré et l’introduction des la Grande Vitesse à d’importantes opérations de réaménagement de leurs contextes. La mise en perspective des scénarios liés aux projets des gares TAV italiennes lancés en 2001révèle que le bâtiment devient enjeu pour concevoir la ville grâce à une profonde redéfinition de ses caractères principaux, soutenue par l’émergence de la dimension topologique au détriment de celle typologique, essentielle pour les gares du siècle dernier. La conception de l’édifice rejette toute f…
Infrastrutture ferroviarie, metropolitane, tranviarie e per ferrovie speciali. Elementi di pianificazione e di progettazione.
2017
Il volume presenta i criteri fondamentali di progettazione geometrico-funzionale delle infrastrutture per i sistemi di trasporto a guida vincolata tra i quali si annoverano sia quelli extraurbani, come le ferrovie convenzionali e ad alta velocità, sia quelli urbani come le metropolitane (“pesanti”, “leggere” ed “automatiche”), le tranvie ed i people movers. Per ogni sistema di trasporto sono descritti gli orientamenti tecnici – progettuali e costruttivi - ritenuti più rilevanti, le peculiarità trasportistiche (ad esempio i valori di capacità) ed i principali riferimenti normativi adottati per la definizione dei singoli elementi compositivi del tracciato delle linee, delle stazioni e delle f…
Bioconjugates of 1’-Aminoferrocene-1-carboxylic Acid with (S)-3-Amino-2-methylpropanoic Acid and L-Alanine
2010
Formal CH 2 insertion in bioconjugates composed of 1'-aminoferrocene-1-carboxylic acid (Fca) and alanine Boc-Ala-Fca-Ala-OCH 3 gives Fca bioconjugates with the β-amino acid (S)-3-amino-2-methylpropanoic acid (Aib). The novel homologous conjugates of ferrocene were fully characterized by spectroscopic and analytical methods. NMR, CD and IR spectroscopy in concert with DFT calculations suggest that the formal "L-Ala-to-(S)-β-Aib mutations" can exert ferrocene helix inversion due to the different stereogenic carbon atoms of L -Ala and (S)-β-Aib. Furthermore, the mutation (de-)stabilizes the conserved secondary structure with two intramolecular hydrogen bonds, depending on the "mutation site". …
Machine learning techniques to estimate the degree of binder activity of reclaimed asphalt pavement
2022
Part of this research was funded by the project RTI2018-096224-J-I00 that has been cofounded by the Spanish Ministry of Science and Innovation, inside the National Program for Fostering Excellence in Scientific and Technical Research, National Subprogram of Knowledge Generation, 2018 call, in the framework of the Spanish National Plan for Scientific and Technical Research and Innovation 2017-2020, and by the European Union, through the European Regional Development Fund, with the main objective of Promoting technological development, innovation and quality research. Part of this work was financially supported by the Italian Ministry of University and Research with the research Grant PRIN 20…