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Implementation of the GTN Damage Model to Simulate the Small Punch Test on Pre-Cracked Specimens

  • Alegre Calderón, Jesús Manuel
  • Cuesta Segura, Isidoro Iván
  • Bravo Díez, Pedro Miguel
11th International Conference on the Mechanical Behavior of Materials (ICM11), Como (Italy), 2011, Nowadays, pre-cracked Small Punch Tests (P-SPT) are used in those cases where there is not enough material for conducting conventional tests. In this paper, P-SPT has been used to determine the fracture properties of the 15.5PH steel, using the micromechanical model, developed by Gurson-Tvergaard-Needleman (GTN). The effect of variation of damage parameters on the numerical simulation has been analyzed. This numerical simulation is based on the sequential adjustment of the experimental load-displacement curves obtained from P-SPT. Interrupted test have been also developed in order to know the cracking process during loading and the damage evolution until fracture., Project MCI Ref: MAT2008-06879-C03-03/MAT
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A CO2-saving-based methodology to measure the impact of the SUMP in European Cities: Application to the city of Burgos

  • Diez, Jose Maria
  • Gonzalo Orden, Hernán
  • Velasco Carrera, Lara
  • López Lambas, María Eugenia
XVIII Congreso Panamericano de Ingeniería de Tránsito, Transporte y Logística (PANAM 2014), Urban mobility in Europe is always a responsibility of the municipalities which propose measures to reduce CO2 emissions in terms of mobility aimed at reducing individual private transport (car). The European Commission's Action Plan on Urban Mobility calls for an increase in the take-up of Sustainable Urban Mobility Plans in Europe. SUMPs aim to create a sustainable urban transport system. Europe has got some long term initiatives and has been using some evaluation procedures. Nevertheless, the weak point with the SUMPs in Spain, has been the lack of concern about the evaluation and the effectiveness of the measures implemented in a SUMP. For this reason, it is difficult to know exactly whether or not the SUMPs have positively influenced in the modal split of the cities, and its contribution to reduce CO2 levels. The case of the City of Burgos is a very illustrative example as it developed a CiViTAS project during the years 2005-2009, with a total investment of 6M€. The results have been considered as “very successful” even at European level. The modal split has changed considerably for better and the cost-effectiveness ratio of the SUMP in the city can be measured with the CO2 ton saved, specifically 36 € per CO2 ton saved, which is fully satisfactory and in line with calculations from other European researchers. Additionally, the authors propose a single formula to measure the effectiveness of the activities developed under the umbrella of a SUMP.
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Cultural industries and symbolic violence: practices and discourses that perpetuate inequality

  • Menéndez Menéndez, María Isabel
ICWAR 2014, Symbolic violence is an analytical category that permits the discovery of practices that contribute to the reproduction of violence against women. However, due to the subtlety of these practices and the disposition of the oppressed group towards complicity as an effect that is incorporated within the same domination, it becomes difficult to perceive them as oppressive. This concealment of the message of cultural industries and its discourse, based on the sublimation of stereotypes, tolerance towards certain types of aggression and the legitimization of certain power relations, finally constructs a discriminatory message that becomes a breeding ground for violence against women., This research was developed within the framework of the “Violencia de género y cultura popular: representación y recepción [Gender violence and popular culture: representation and reception]” project, cofinanced by the Ministerio de Sanidad, Servicios Sociales e Igualdad of the Government of Spain and the European Social Fund (Reference 115/12)
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Beyond earned value management: a graphical framework for integrated cost, schedule and risk monitoring

  • Acebes, Fernando
  • Pajares Gutiérrez, Javier
  • Galán Ordax, José Manuel
  • López Paredes, Adolfo
26th IPMA World Congress. 2012, Crete, Greece,, In this paper, we propose an innovative and simple graphical framework for project control and monitoring, to integrate the dimensions of project cost and schedule with risk management, therefore extending the Earned Value methodology (EVM). EVM allows Project managers to know whether the project has overruns (over-costs and/or delays), but project managers do not know when deviations from planned values are so important that corrective actions should be taken or, in case of good performance, sources of improvement can be detected. From the concept of project planned variability, we build a graphical methodology to know when a project remains “out of control” or “within expected variability” during the project lifecycle. To this aim, we define and represent new control indexes and new cumulative buffers. Five areas in the chart represent five different possible project states. To implement this framework, project managers only need the data provided by EVM traditional analysis and Monte-Carlo simulation. We also explore the sensitivity of the methodology to control variables., Project “Computational Models for Strategic Project Portfolio Management”, supported by the Regional Government of Castile and Leon (Spain) with grant VA056A12-2.
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Exploring the influence of seasonal uncertainty in project risk management

  • Acebes, Fernando
  • Pajares Gutiérrez, Javier
  • Galán Ordax, José Manuel
  • López Paredes, Adolfo
27th IPMA World Congress, For years, many research studies have focused on programming projects, assuming a deterministic environment and complete task information. However, during the project performance, schedule may be subject to uncertainty which can lead to significant modifications. This fact has led to an increasing scientific literature in the field. In this article we consider the presence of an uncertainty of seasonal type (e.g. meteorological) that affects some of the activities that comprise the project. We discuss how the project risk can be affected by such uncertainty, depending on the start date of the project. By means of Monte Carlo simulation, we compute the statistical distribution functions of project duration at the end of the project. Then, we represent the variability of the project through the so-called Project Risk Baseline. In addition, we examine various sensitivity metrics - Criticality, Cruciality, Schedule Sensitivity Index -. We use them to prioritize each one of the activities of the project depending on its start date. In the last part of the study we demonstrate the relative importance of project tasks must consider a combined version of these three sensitivity measures., the project SPPORT: “Computational Models for Strategic Project Portfolio Management”, supported by the Regional Government of Castile and Leon (Spain) with grant VA056A12-2
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Social image of disability. Vulnerability of the dignity of women with disability and social exclusion contexts

  • Gómez Monedero, José Antonio
  • Unanue Cuesta, Concepción
  • Núñez Angulo, Beatriz F.
ICWAR 2014, Disability does not have nor had the same perception in all civilizations. Its treatment and considerations have been very complex and diverse within its regions and have generated multiple discriminatory behaviors. Today, we live in a new social paradigm developed with human rights in mind that people with disabilities enjoy. This new model, more human, has been adopted in most countries of the world. These rights are consistent with equality in opportunities thanks to the support in new policies and new action programs in favor of education, health, and work rights to help them enjoy their full potential. The rights for people with disabilities has been reinforced with the support and legislative recommendations made from the European Convention for the Protection of Human Rights and Fundamental Freedom of 1953, from the Program of World Action for Disabilities (Decade of United Nations for People with Disabilities between 1983-1992), from the European Action Plan for People with Disabilities 2003 - 2010, Strategies about Disabilities 2010-2020 in the European Union. In Spain, with the law of April 7th of 1982: Law of Social Integration for the Handicapped (LISMI) and also, with the law of 51/2003, of December 2nd, of Equal Opportunities, no Discrimination and Universal Accessibility for People with Disabilities (LIONDAU). Society has come a long way which has allowed us to change from humiliating conceptualizations like: crazy, demential, disable, handicapped, deficient, etc., to the new concept of people with disabilities. Regardless of this improvements, reality shows the precariousness situation that this people live, especially, women and girls with disabilities. They have difficulties even to be able to read and write. They are excluded from the education system, work training and some basic health services that ignore them and deny their right to reproduce and deny their sexuality. Therefore, they suffer a greater social exclusion and are more vulnerable to violence situations for multiple discriminations: to be a woman and to have a disability. They face a social image that is invisible and anonymous in our society.
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Density, adhesion and stiffness of warm mix asphalts

  • Vega Zamanillo, Ángel
  • Calzada Pérez, Miguel A.
  • Sánchez Alonso, Elsa
  • Gonzalo Orden, Hernán
XI Congreso de Ingeniería del Transporte (CIT 2014), This study presents the results of different laboratory tests related to the density, adhesion (sensitivity to water test) and rigidity (resilient module) of bituminous mixtures, manufactured at three different temperatures (160 °C, 140 °C and 120 °C), with three additives: a surfactant made up of different amino substances, a paraffin obtained by the Fisher-Tropsch synthesis process which is totally soluble in bitumen, and a synthetic zeolite in powder form which causes the bitumen to micro-foam,. Test samples have been compacted by impact, according to the Marshall method, and kneading, according to gyratory machine. To evaluate these properties an asphalt concrete mixture has been chosen, with a binder, B-50/70, and a maximum size of aggregates of 16 mm, which is usually placed in the surface layer of the pavement. The densities obtained by the two compaction methods are easy to reach. Densities will decrease if the temperature of manufacturing is lower. All mixtures compacted by gyratory machine at different temperatures displayed very good behavior of water sensitivity; but not all mixtures compacted by impact achieved this. The additives improve the adhesion between aggregate and binder. The stiffness moduli decreased in all mixtures for both types of compaction when the temperature was higher, and this reduction is less pronounced in the mixes manufactured with the gyratory compactor. Mixtures with additives tend to reduce the module, except paraffin., This paper is based on the results for the Fenix Project. The development of the Fenix Project was possible thanks to the financial contribution of the Center for Technological and Industrial Development (CDTI) within the framework of the Ingenio 2010 programme, through the CENIT Programme.
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Instance selection of linear complexity for big data

  • Arnaiz González, Álvar
  • Diez Pastor, José Francisco
  • Rodríguez Diez, Juan José
  • García Osorio, César
Over recent decades, database sizes have grown considerably. Larger sizes present new challenges, because machine learning algorithms are not prepared to process such large volumes of information. Instance selection methods can alleviate this problem when the size of the data set is medium to large. However, even these methods face similar problems with very large-to-massive data sets. In this paper, two new algorithms with linear complexity for instance selection purposes are presented. Both algorithms use locality-sensitive hashing to find similarities between instances. While the complexity of conventional methods (usually quadratic, O(n2), or log-linear, O(nlogn)) means that they are unable to process large-sized data sets, the new proposal shows competitive results in terms of accuracy. Even more remarkably, it shortens execution time, as the proposal manages to reduce complexity and make it linear with respect to the data set size. The new proposal has been compared with some of the best known instance selection methods for testing and has also been evaluated on large data sets (up to a million instances)., Supported by the Research Projects TIN 2011-24046 and TIN 2015-67534-P from the Spanish Ministry of Economy and Competitiveness.
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Bikeways and cycling urban mobility

  • Gonzalo Orden, Hernán
  • Linares, Alaitz
  • Velasco Carrera, Lara
  • Diez, Jose Maria
  • Rojo Arce, Marta
XI Congreso de Ingeniería del Transporte (CIT 2014), During the past years, cycling use has been promoted in our cities as an alternative to other modes of transport. One of the main objectives of the utilization of the bicycles is to reduce the use of private vehicles powered by fossil fuel. In this paper some of the advantages and benefits of the cycling use are presented, and some factors that influence its utilization are analysed. In particular, the study is focused on the barrier elements and, more specifically, in the structural barrier factors. Further on, more than 70 kilometres of bicycle network in several cities of the region of Castile and Leon (Spain) have been analysed, in order to see their potential influence on the use of the bicycle. From the results of this analysis some recurring problems emerge and make us identify that the total length of the bicycle network is not so important as the number of destinations and completed itineraries that can be reached in an effective and safe way.
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Study of the thermal, dielectric and mechanical properties of poly(methyl methacrylate-co-(1,4,7,10-tetraoxacyclododecan-2-yl)methyl Methacrylate) Membranes

  • Redondo Foj, B.
  • Ortiz Serna, P.
  • Carsí, M.
  • Sanchis, M.J.
  • Díaz-Calleja, R.
  • García García, Félix Clemente
Euromembrane Conference 2012, DGCYT and CAM through the Grant MAT2008-06725-C03
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