Search results for " Cost"
showing 10 items of 3966 documents
Effects of Air Tightness Tests on Steel Thin-Wall Box Structures with Circular and Rectangular Cross Sections
2019
In this paper, the effects of air tightness tests on steel box structures with rectangular or circular cross sections typical of port cranes (legs, arms, and crosspieces) are analyzed. Legs and arms are generally made with elements with profiles having a square or rectangular cross section, while the diagonal struts are made with profiles having circular cross sections. To verify the air tightness of these elements, a necessary requirement to protect them from corrosion if they are not protected with other protection techniques, air tightness tests are performed. These tests, in the framework of durability tests, must be carried out while maintaining the structure elasticity well below the …
Estimating economic severity of Air Traffic Flow Management regulations
2021
The development of trajectory-based operations and the rolling network operations plan in European air traffic management network implies a move towards more collaborative, strategic flight planning. This opens up the possibility for inclusion of additional information in the collaborative decision-making process. With that in mind, we define the indicator for the economic risk of network elements (e.g., sectors or airports) as the expected costs that the elements impose on airspace users due to Air Traffic Flow Management (ATFM) regulations. The definition of the indicator is based on the analysis of historical ATFM regulations data, that provides an indication of the risk of accruing dela…
DEVELOPMENT AND APPLICATIONS OF A VIRTUAL HYBRID PLATFORM FOR MULTISCALE ANALYSIS OF ADVANCED STRUCTURES OF AIRCRAFT (DEVISU)
2022
This paper outlines the main findings of the project “DEvelopment and applications of a VIrtual hybrid platform for multiscale analysis of advanced StructUres of aircraft” (DEVISU), which deals with failure of composite structures and noise/vibration reduction, along with investigation of new materials for aerospace applications.
Computational Analysis of the Active Control of Incompressible Airfoil Flutter Vibration Using a Piezoelectric V-Stack Actuator
2021
The flutter phenomenon is a potentially destructive aeroelastic vibration studied for the design of aircraft structures as it limits the flight envelope of the aircraft. The aim of this work is to propose a heuristic design of a piezoelectric actuator-based controller for flutter vibration suppression in order to extend the allowable speed range of the structure. Based on the numerical model of a three degrees of freedom (3DOF) airfoil and taking into account the FEM model of a V-stack piezoelectric actuator, a filtered PID controller is tuned using the population decline swarm optimizer PDSO algorithm, and gain scheduling (GS) of the controller parameters is used to make the control adapti…
Alessandro Costariol. 永远的视觉设计师 / Alessandro Costariol. Remote future visual designer
2010
永远的视觉设计师 如果用一个词来简洁鲜明的概括一个人的话，我认 为永恒一词是最佳选择。这个词是个近代词汇， 始创于20世纪，表达出一种时代特性。在逻辑学 和语言学领域重复出现。它标志着客体和时间连 续性的中断。并赋予客体以特权， 跨越时间的限 制，忽略时间发展的顺序和速度，使客体处于一种 独立的暂停状态。永恒所表达的含义如同一个现代 人穿了一件古时的衣服，这种古时和现代的不同风 格常常冲突不断，就像一道糖醋口味的菜肴中，一 个口味偏咸的人却意外的品尝到了甜味。 If you could define a person with only one term, to have a concise, sharp and lapidary picture of him, then I think the word I'd choose to refer to Alessandro Costariol, is timeless. This is a rather recent term, coined in the twentieth century, expression of contemporaneity, recurrent in the philosophical and linguistic fields, which marks a break in continuity between object and time, giving the first a privileged status that allows it to cross the second, ign…
I tempi di Alessandro Manzoni
2020
La costruzione del testo manzoniano fa un uso accurato dei tempi verbali. L'articolo mette in luce tale uso in alcuni passi topici dei Promessi Sposi.
Technical advance: Soluble OX40 molecule mimics regulatory T cell modulatory activity on FCεRI-dependent mast cell degranulation
2011
ABSTRACT Tregs play a central role in modulating FcɛRI-dependent MC effector functions in the course of the allergic response. Cellular interaction depends on the constitutive expression of OX40 on Tregs and the OX40L counterpart on MCs. Study of OX40L signaling on MCs is hampered by the need of a highly purified molecule, which triggers OX40L specifically. We now report that sOX40 mimics the physiological activity of Treg interaction by binding to activated MCs. When treated with sOX40, activated MCs showed decreased degranulation and Ca++ influx, whereas PLC-γ2 phosphorylation remained unaffected. Once injected into experimental animals, sOX40 not only located within the endothelium but a…
Influence of Joint Geometry on Micro and Macro Mechanical Properties of Friction Stir Spot Welded Joints
2014
AbstractSpot welding can be considered a very common joining technique in automotive and transportation industries as it permits to obtain effective lap-joints with short process times and what is more it is easily developed through robots and automated systems. Recently, Friction Stir Spot Welding (FSSW) has been proposed as a natural evolution of the already known Friction Stir Welding (FSW) process, allowing to obtain sound spot joints that do not suffer from the insurgence of typical welding defects due to the melting of the base material. Similarly to FSW, both geometrical and technological parameters must be considered as they affect the material flow and the heat flux generated durin…
La Sicilia nell’area euro-mediterranea: radici antiche di un ponte culturale ed economico ancora attuale
2020
Nel Dipartimento di Architettura dell’Università di Palermo durante l’ultimo decennio sono state sviluppate alcune attività di ricerca nell’ambito della cooperazione transfrontaliera Italia-Tunisia, programma europeo i cui obiettivi sono ben riassunti dal motto Défis communs, objectifs partagés (Sfide comuni, obiettivi condivisi). Il programma ha fornito, principalmente a partner con sede nelle province della costa sud della Sicilia e di quella nord della Tunisia, l’occasione per lavorare congiuntamente sui molti temi di interesse comune. Il contributo riporta una sintesi delle attività svolte e un cenno a quelle proposte per la nuova programmazione, dopo aver presentato alcune considerazio…
STRUMENTI E METODI PER INTEGRARE GLI ASPETTI AMBIENTALI NELLA MANUTENZIONE DEL PATRIMONIO ARCHITETTONICO
2022
La corretta e costante applicazione della manutenzione può assumere un ruolo chiave per garantire la qualità del patrimonio costruito e il soddisfacimento delle più recenti classi di requisiti ambientali. A tal fine, è necessario che le strategie che guidano la programmazione delle attività di manutenzione siano modellate sulle caratteristiche del manufatto in esame. In Italia una larga parte degli edifici risulta edificata prima del 1946 e, molti di questi seppur non strettamente tutelati dalla legge, possono presentare rilevanti caratteri morfologici o costruttivi che vanno opportunamente conservati. La manutenzione, condotta in un’ottica sistemica e multiscalare, comprendendo interventi …