Search results for " tecnologia."
showing 10 items of 1339 documents
Bending test for capturing the fractional visco-elastic parameters: theoretical and experimental investigation on giant reeds
2014
In this paper attention is devoted on searching a proper model for characterizing the behavior of giant reeds. To aim at this, firstly, meticulous experimental tests have been performed in the Laboratory of structural materials of University of Palermo. Further, the novel aspect of this paper is that of using an advanced Euler-Bernoulli model to fit experimental data of bending tests. Such a model of continuum beam takes into account different constitutive laws of visco-elasticity, being real materials visco-elastic.
Peripheral Centralities: An Integrated Approach
2017
Un profondo cambiamento caratterizza a livello globale gli insediamenti urbani: ciò può essere osservato attraverso le relazioni tra centro e periferie. Le aree periferiche sono il banco dove il futuro delle città può essere opportunamente messo alla prova, in cui è possibile prefigurare la futura qualità della vita di individui e comunità. Sicurezza, sostenibilità, benessere che potranno essere raggiunti nelle aree periferiche saranno più rilevanti in termini quantitativi; invece il senso di identificazione e appartenenza, più forte nelle aree centrali, è debole o assente nelle periferie. Occorre puntare quindi a una sorta di centralità diffusa, applicando un approccio integrato, che si ad…
A systematic literature review on less common natural fibres and their biocomposites
2018
Abstract Interest in utilization of renewable resources is increasing because of public's environmental awareness and economic considerations. Lignocellulosic fibres have already attracted growing attention as reinforcement of polymeric matrices instead of synthetic ones (mainly glass) from the academic and industrial fields. In addition to kenaf, hemp, sisal, flax and jute, which are the subject of extensive investigations for composite applications since the 1970s, in the last years several researchers suggested the use of less common natural fibres, due to their low cost and availability. This paper reviews the extraction methods, chemical, morphological, thermal and mechanical propertie…
Nanotechnology for Photovoltaic Cells and Energy Efficiency
2015
Abstract. The intent of this paper is to connect science and technology in order to demonstrate how, in the field of on photovoltaic technologies, thin film solar cells have been the focus of many research facilities in recent years that are working to decrease manufacturing costs and increase cell efficiency. New research suggests that it might be possible to add a nanoscopic relief pattern to the surface of solar cells that makes them non-reflective significantly boosting efficiency and at the same time making them highly non-stick and self-cleaning. The paper presents the challenges and approaches to engineer the active layer of the cell, in order to obtain cells made up of components as…
Enginyeria, Societat i Universitat - Apunts esquemàtics i guia de pràctiques de l’assignatura (curs 2017-2018)
2017
El document forma part dels materials docents programats mitjançant l'ajut del Servei de Política Lingüística de la Universitat de València. Aquest document conté una presentació esquemática de l'assignatura, les diapositives emprades a l'aula corresponents als blocs "Història de la tecnologia", "Ciència, tecnologia i societat", "Mètodes de treball en ciència i tecnologia" i "L'enginyeria com a professió" i l'enunciat de tres de les pràctiques a realitzar al llarg del curs.
Tratamiento de emisiones a la atmósfera de acetato de etilo y tolueno mediante biofiltros de turba.
2009
En las últimas décadas, la calidad del aire y el control de la contaminación atmosférica vienen siendo líneas principales de actuación en política medioambiental a fin de evitar daños sobre la salud humana y el medio ambiente. Los compuestos orgánicos volátiles, entre los que se encuentran el acetato de etilo y el tolueno, son uno de los principales contaminantes atmosféricos de origen industrial. Las nuevas reglamentaciones asociadas a la emisión de compuestos orgánicos volátiles procedentes del uso de disolventes en determinadas instalaciones industriales hacen necesaria la búsqueda de técnicas o procedimientos para reducir, minimizar o eliminar este tipo de emisiones. En este sentido, lo…
Les activités de formation APER / Le attività di formazione APER
2014
APER Project activities included training activities set up for ten young professionals, five Sicilian and five Tunisians. The training seminars – held in November 2012 and December 2013 in Tunis and in May 2013 and March 2014 in Agrigento – were intense moments of productive debate and exchange among the participants, who were asked to be proactive. Over the second year, the topics chosen to summarise and bring into focus the APER Project’s work (conservation and protection; planned maintenance and administration; use and access; communication and museography; integrated cultural tourism) were examined in depth by five couples, each one made up of a young Tunisian and a young Sicilian who …
FULL PAPER: Earth for social housing in Palestine: an alternative for a sustainable refurbishment of building’s envelopes
2016
The suitable climates in the cities of Jericho and Gaza boosted the emergence of new attempts to revive earthen architecture on organizational and individual levels. These attempts produced a number of earthen buildings in the last few years following the crucial need to find alternative low cost material instead of natural stone, which is used in a large scale in Palestine. Similar attempts had a certain response to the social needs and economic situation there. This paper focuses on the possibility of using earth as an alternative material to refurbish the envelopes of existing housing units including two categories; firstly, refurbishing envelopes of housing units those were partially de…
End-of-life and waste management of disposable beverage cups.
2021
Different human activities have caused and currently cause catastrophic environmental phenomena, and unfortunately, a significant negative contribution to these catastrophic phenomena can be attributed to uncontrolled plastic production, use and release everywhere. On the other hand, the plastics offer numerous comforts and advantages, and for this reason, the modern life is unthinkable without plastic. Currently, numerous scientific papers and large audience advertisings, related to the production and use of polymers made by natural sources, i.e. bio-based polymers, as a valid alternative to the petroleum-based counterparts, have been published. Therefore, for production of daily disposabl…
Monitoring of the effect of solar radiation and rain on the building envelope with integrated vertical vegetation
2022
The goal of the present paper is the verification of the improvement of the performance of a building envelope with a green wall also in conditions of high irradiance (≥0.6 kW/m2) and with variable meteorological conditions (sunny, cloudy, and rainy), with a focus on intense rainfall and tempest. The object of the analysis has been the Innovation and Technology for Development Center in the University Campus of the Polytechnics of Madrid, where a modular system of integrated vertical vegetation has been installed on the skin of the South and West prospects. The study is based on the analysis of the effective thermoregulation capacity of the system in different climatic situations and has be…