Exploració per tema "Ageing"

Ara es mostren els items 1-20 de 34

    • A sensitive technology for a sensitive challenge 

      Dodo, Audrey (Càtedra d'Accessibilitat, 2012)
      Article
      Accés obert
      This paper deals with technology and its applications for an ageing population. It aims at discussing the issues raised by such a relationship and highlights healthcare-related designs. It questions the notion of product ...

    • Ageing and temperature effect on the fatigue performance of bituminous mixtures 

      López Montero, Teresa; Miró Recasens, José Rodrigo (Instituto Técnico de la Construcción y del Cemento, 2017-07)
      Article
      Accés obert
      The ageing of asphalt mixes, together with their exposure to low temperatures, causes a progressive increase of cracking. In this paper, the effect of ageing and temperature on the fatigue of asphalt concretes made with ...

    • Ageing of an oscillator due to frequency switching 

      Bonet Revés, Carles; Jeffrey, Mike R.; Martín de la Torre, Pablo; Olm Miras, Josep Maria (2021-11-01)
      Article
      Accés obert
      If an oscillator is driven by a force that switches between two frequencies, the dynamics it exhibits depends on the precise manner of switching. Here we take a one-dimensional oscillator and consider scenarios in which ...

    • Ageing of resin from Pinus species assessed by infrared spectroscopy 

      Beltran Sanchidrian, Victòria; Salvadó Cabré, Nativitat; Buti Papiol, Salvador; Pradell Cara, Trinitat (2016-04-06)
      Article
      Accés obert
      Resins obtained from Pinus genus species have been widely used in very different fields throughout history. As soon as the resins are secreted, molecular changes start altering their chemical, mechanical and optical ...

    • Analysing the potential use of a low-grade magnesium carbonate by-product as a filler in hot asphalt mixtures 

      López Montero, Teresa; Maldonado Alameda, Alex; Mañosa Bover, Jofre; Miró Recasens, José Rodrigo; Chimenos Ribera, Josep Maria (2022-06)
      Article
      Accés obert
      Climate change and natural resources depletion are leading society towards a more environmentally sustainable approach. In areas such as construction or civil engineering, waste and by-products valorisation could help in ...

    • Analysis of the ageing effect on the cyclic tension–compression loading behaviour of bitumen and mastics 

      Micaelo, Rui; Botella Nieto, Ramón; Pérez Jiménez, Félix Edmundo; Sá da Costa, Margarida (Elsevier, 2020-05)
      Article
      Accés obert
      Within the bituminous mixture the binder is subjected to different stress-state modes but the cyclic loading response is usually characterized on shear mode. This research investigates the evolution with ageing of the ...

    • Anàlisi de l’envelliment de la població espanyola 

      Mateos Rabaza, Claudia (Universitat Politècnica de Catalunya / Universitat de Barcelona, 2020-06)
      Treball Final de Grau
      Accés obert
      [cat] La piràmide poblacional espanyola ha anat canviant en les últimes dècades a conseqüència de la transició demogràfica, que ha comportat una reducció de la fecunditat i un augment en l’esperança de vida. Actualment ...

    • Backanalysis of measured movements in ageing tunnels 

      Santos Rodríguez, Cristian de; Ledesma Villalba, Alberto; Gens Solé, Antonio (Universitat Politècnica de Catalunya. Escola Tècnica Superior d'Enginyers de Camins Canals i Ports de Barcelona, 2011-11-15)
      Comunicació de congrés
      Accés obert
      The paper describes a procedure to perform backanalysis in a systematic manner in the context of ageing tunnels. Basically the input data include information on relative displacements or deformations of specific points ...

    • Cooperativas vecinales para el envejecimiento activo en barriadas obsoletas: implicaciones en la mejora del mercado de alquiler 

      Rosa Jiménez, Carlos Jesus; Nebot, Nuria (Centre de Politica de Sol i Valoracions, CPSV / Universitat Politècnica de Catalunya, UPC, 2019-12)
      Text en actes de congrés
      Accés obert
      En el año 2050 la población mayor de 65 años llegará a 2.000 millones en todo el mundo. En España –de forma similar al resto de países del área meridional europea–, el proceso de envejecimiento de la población se inició ...

    • Design of a broadband CMOS RF power amplifier to establish device-circuit aging correlations 

      Barajas Ojeda, Enrique; Mateo Peña, Diego; Aragonès Cervera, Xavier; Crespo Yepes, Albert; Rodríguez Martínez, Rosana; Martin Martínez, Javier; Nafría Maqueda, Montserrat (Institute of Electrical and Electronics Engineers (IEEE), 2017)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      This paper presents the design of a Broadband CMOS RF Power Amplifier, suitable to be stressed at circuit level but with the possibility to be measured both at circuit and at device level. It allows establishing a relation ...

    • Design of a CMOS power amplifier and built-in sensors for variability monitoring and compensation 

      Fernández Tomás, Alejandro (Universitat Politècnica de Catalunya, 2017-10)
      Projecte Final de Màster Oficial
      Accés obert
      This research thesis aims to develop a system composed by a a CMOS power amplifier and built-in sensors for variability monitoring and compensation. The integration of monitoring systems with high frequency analog circuits ...

    • Differences in cracking resistance of asphalt mixtures due to ageing and moisture damage 

      López Montero, Teresa; Miró Recasens, José Rodrigo (2016-06)
      Article
      Accés obert
      The ageing phenomenon and moisture damage become key factors to evaluate mixture cracking resistance. In this paper, the effect of ageing and water on cracking resistance and fatigue behavior in a bituminous mixture is ...

    • Effect of ageing and water action on the cracking resistance of asphalt mixtures 

      López Montero, Teresa; Miró Recasens, José Rodrigo; Pérez Jiménez, Félix Edmundo; Botella Nieto, Ramón (Springer, 2016)
      Comunicació de congrés
      Accés restringit per política de l'editorial
      Cracking in asphalt layers is one of the most frequent distress mechanisms in flexible pavements due to thermal stresses and traffic loads. Furthermore, the ageing phenomenon along with moisture damage are the key factors ...

    • Effect of nanomaterials on ageing and moisture damage using the indirect tensile strength test 

      López Montero, Teresa; Crucho, João; Picado-Santos, Luís; Miró Recasens, José Rodrigo (2018-04)
      Article
      Accés obert
      Environmental conditions as well as traffic loads lead to the deterioration of asphalt pavements during their service life. For this reason, the use of nanomaterials that improve the mixtures behaviour could be interesting. ...

    • Effect of of ageing and temperature on the fatigue behaviour of bitumens 

      Miró Recasens, José Rodrigo; Martínez Reguero, Adriana Haydée; Moreno Navarro, Fernando; Rubio Gámez, María del Carmen (2015-12)
      Article
      Accés obert
      Bitumen ageing plays a significant role in determining the resistance of asphalt mixes to fatigue cracking. Regardless of the type of ageing (oxidation during manufacture or during the service life), hardening effects ...

    • El envejecimiento de las baterías de un vehículo eléctrico y cómo lo percibe el conductor 

      Canals Casals, Lluc; Amante García, Beatriz; Castellà Daga, Santiago (2016-03-01)
      Article
      Accés obert
      The electric vehicle is steadily entering into the automotive market. Most of these vehicles are equipped with Li-ion batteries to store the electric energy. Despite of the fast charge and the autonomy range, one of the ...

    • Entropy characterisation of overstressed capacitors for lifetime prediction 

      Cuadras Tomàs, Àngel; Romero, Ramón; Ovejas Benedicto, Victòria Júlia (2016-12-30)
      Article
      Accés obert
      We propose a method to monitor the ageing and damage of capacitors based on their irreversible entropy generation rate. We overstressed several electrolytic capacitors in the range of 33 µF–100 µF and monitored their entropy ...

    • Entropy generation model to estimate battery ageing 

      Cuadras Tomàs, Àngel; Miró Jané, Pol; Ovejas Benedicto, Victòria Júlia; Estrany Coda, Francesc (Elsevier, 2020-12)
      Article
      Accés obert
      Determining battery ageing is a key issue in predicting the available charge in battery-operated systems. Beyond the common use of voltage or current measurements, which have proved unsuccessful as general methods, we aim ...

    • Evaluation of the mechanical performance and durability of binary blended CAC-MK/natural fibre composites 

      Ramírez Sánchez, Madelin Jaroni del Pilar; Claramunt Blanes, Josep; Ventura Casellas, Heura; Ardanuy Raso, Mònica (Elsevier, 2020-08-10)
      Article
      Accés obert
      The aim of this work was to develop strain hardening cementitious composites (SHCC) and durable composites based on calcium-aluminate cement (CAC) with variable metakaolin (MK) content (from 0 to 50 wt%) and flax nonwoven ...

    • Evaluation of the rejuvenation of asphalt by means of oil-saturated porous aggregates 

      Casado Barrasa, Raquel; López Montero, Teresa; Castro Fresno, Daniel; Miró Recasens, José Rodrigo (2022-02)
      Article
      Accés obert
      Road degradation is an increasing problem for assets managers. Roads deteriorate mainly due to the combination of different factors, such as temperature, climate and traffic loads. This causes the asphalt to age and, ...