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From KPIs to operationalising the quality of the passenger experience
No full textChapter 10 of this volume described the way in which METPEX developed a series of key performance indicators (KPIs) to measure the quality of the whole journey experience. However, this chapter provides a list of variables for each of the KPIs that can then be used to develop survey instruments. It is suggested that each of the variables is turned into 5 point Likert type scale questions, which will then enable easy comparison with the benchmarking scores we have obtained. Figure 12.1 shows the groups of which have been developed, each of these is examined in more detail in the following sections
Il Sacro Monte di Varallo: Valutazione del rischio sismico tramite monitoraggio con le Emissioni Acustiche e modelli numerici strutturali
No full textShear tests on joined materials
No full textResults of an experimental investigation on brittle and non-brittle joining materials for ceramics tested in torsion will be presented and discussed. SiC hourglass shaped samples have been joined by glass-ceramics or by adhesives. The hourglass shape must be designed to minimize stress concentration and have shear stress only in the joined area. When the joining material is purely brittle (glass-ceramics), the shear strength is evaluated from the maximum of the torque/rotation curve. In the case of non purely brittle joining materials (adhesives) the joined area must be gradually reduced to a ring-shaped area until size independent results are obtained and the maximum of the torque/ rotation curve can be used to evaluate the shear strength. Modelling results help understanding the failure mode and therefore the meaning of the measured strength
Synthesis and characterization of UV-LED curable nanocomposite coatings
No full textObjective - In the present work, the possibility of using UV-LED curing processes for the design of "smart" nanocoatings showing enhanced thermal, thermo-mechanical and barrier properties was thoroughly investigated. Method - A commercially available ethoxylated bisphenol A diacrylate resin, chosen as a model system, was added of 5 wt.% of an organophilic nanoclay (Cloisite 30B) and of a photoinitiator (2,4,6-Trimethylbenzoyl-diphenyl-phosphineoxide), suitable for the UV-LED curing process. The system was then exposed to UV-LED radiation; the obtained coatings were characterized. Results - As assessed by infrared spectroscopy and differential scanning calorimetry, a quick exposure (i.e. 5 s) to the UV-LED radiation in dynamic conditions was enough to achieve the completeness of the photocuring reaction. The morphology of the obtained coatings was characterized using X-ray diffraction and scanning electron microscopy: in particular, a clear increase of the interlayer distance was observed, hence indicating the occurrence of intercalation phenomena of the nanofiller into the curable resin. Furthermore, the good interactions taking place between the clay nanoplatelets and the polymer network were responsible for: i) an increase of the glass transition values of the polymer network, ii) enhanced thermal and thermo-oxidative stability of the nanocoatings and iii) improved barrier properties towards oxygen diffusion. Conclusion - The UV-LED curing process was found very suitable for obtaining nanostructured coatings showing decreased oxygen permeability, as well as improved thermal and thermo-mechanical features
A COMPARISON AMONG DIFFERENT OPTIMIZATION LEVELS IN 3D MULTI-SENSOR MODELS. A TEST CASE IN EMERGENCY CONTEXT: 2016 ITALIAN EARTHQUAKE
No full textIn sudden emergency contexts that affect urban centres and built heritage, the latest Geomatics technique solutions must enable the demands of damage documentation, risk assessment, management and data sharing as efficiently as possible, in relation to the danger condition, to the accessibility constraints of areas and to the tight deadlines needs. In recent times, Unmanned Vehicle System (UAV) equipped with cameras are more and more involved in aerial survey and reconnaissance missions, and they are behaving in a very cost-effective way in the direction of 3D documentation and preliminary damage assessment. More and more UAV equipment with low-cost sensors must become, in the future, suitable in every situation of documentation, but above all in damages and uncertainty frameworks. Rapidity in acquisition times and low-cost sensors are challenging marks, and they could be taken into consideration maybe with time spending processing. The paper will analyze and try to classify the information content in 3D aerial and terrestrial models and the importance of metric and non-metric withdrawable information that should be suitable for further uses, as the structural analysis one. The test area is an experience of Team Direct from Politecnico di Torino in centre Italy, where a strong earthquake occurred in August 2016. This study is carried out on a stand-alone damaged building in Pescara del Tronto (AP), with a multi-sensor 3D survey. The aim is to evaluate the contribution of terrestrial and aerial quick documentation by a SLAM based LiDAR and a camera equipped multirotor UAV, for a first reconnaissance inspection and modelling in terms of level of details, metric and non-metric information
Second law efficiency for living cells
No full textThe exergetic analysis of the biosystems is developed. It takes into account that cells are able to convert only part of the energy absorbed. The result is to highlight the fundamental role of the exergy as a quantity useful to develop considerations on the cells behavior in relation to normal or disease states
