Predictability of Extreme Intensity Pulses in Optically Injected Semiconductor Lasers

The predictability of extreme intensity pulses emitted by an optically injected semiconductor laser is studied numerically, by using a well-known rate equation model. We show that symbolic ordinal time-series analysis allows to identify the patterns of intensity oscillations that are likely to occur before an extreme pulse. The method also gives information about patterns which are unlikely to occur before an extreme pulse. The specific patterns identified capture the topology of the underlying chaotic attractor and depend on the model parameters. The methodology proposed here can be useful for analyzing data recorded from other complex systems that generate extreme fluctuations in their output signals

Restituyendo la memoria de las mujeres a través del patrimonio social urbano

El pasado tiene distinto significado para los individuos y grupos sociales que forman una misma ciudad. El paisaje urbano actual, que alimentan la memoria pública de los ciudadanos en forma de “territorio común”, no cuenta con una representación de esta diversidad de historias particulares. Las mujeres, uno de estos grupos sociales no representados, carecen de memoria histórica en el espacio urbano. Se propone en este texto que se pongan en valor nueva política de construcción del lugar, redefiniendo la experiencia establecida culturalmente por las mujeres, y haciendo visibles algunas de sus partes olvidadas

Experimental protocol to assess the tourism vehicles accessibility based on heart rate and access time measurements

[EN] The objective of the Project is to define an experimental protocol for the accessibility assessment of the transport vehicles, by analysing the evolution of the effort and time variables consumed by a target group –Persons of Reduced Mobility (PMRs). This protocol consisted in tests of accessibility on a sample of 6 passenger cars (class M1) by 8 elderly people carrying a heart rate monitor, and whose access manoeuvres were recorded by video cameras. Based on the Hilloskorpi et al. [1] model and by developing a method of truncation of the heart rate (HR) tests records - eliminating the component of the work biologically needed by the organism to keep its basal metabolic rate from the work each person performed – it was possible to evaluate how much energy each individual invested in each access manoeuver. Immediately after each test, and after the whole round of vehicles, each participant was surveyed for a subjective assessment of the difficulty of accessing to the cars. According to each of the above results, the HR objective measurements and the subjective opinion about the ease of access experienced by each individual, the vehicles were ranked by order of accessibility to the front and rear seats. The result of both rankings showed the orders of the similar vehicles, the potential of the method and a fair closeness between its results and the subjective, but real and unequivocal, judgments of the participants.This article is based on the Project "Desarrollo de un protocolo experimental de evaluación de la accesibilidad a los vehículos turismo en base a mediciones de frecuencia cardíaca y tiempo de acceso", October 2015 in Madrid, Spain.Alcalá Fazio, E.; Alvarez Fernández, N. (2016). Experimental protocol to assess the tourism vehicles accessibility based on heart rate and access time measurements. En XII Congreso de ingeniería del transporte. 7, 8 y 9 de Junio, Valencia (España). Editorial Universitat Politècnica de València. 2511-2518. https://doi.org/10.4995/CIT2016.2016.3501OCS2511251

Formulación y tratamiento de un «problema social»: En torno a los desalojos forzosos en la Canada Real (Madrid)

La Canada Real es un asentamiento informal de unos 15 kilómetros de largo situado al sureste de Madrid. Este articulo examina los desalojos forzosos que tuvieron lugar en él entre 2007 y 2012, en conexión con la construcción mediatica y politica de la Canada como un «problema». Tomando el caso de personas desplazadas in situ por los desalojos, se muestran las consecuencias que tuvieron en términos de vulnerabilidad y cuestionamiento de la ciudadania. Los desalojos forzosos en la Canada podrian asimismo formar parte de un proceso mas amplio de desplazamiento de población y acumulación por desposesión

Study of thermal behaviour of microsystems for Reaction Engineering

Process intensification is a new paradigm in Chemical Engineering, aiming at achieving sustainability in the process industry, so the world’s requirements for energy and consumer products are met without compromising those needs for future generations. Microreactor technology is a huge step forward in the pursuit to achieve process intensification design methodologies, “doing more with less”. The microreactor provides many benefits over conventional sized reactors used in the process industry, such as the ability to easily control the reaction parameters, yield and efficiency are vastly improved, mass and heat transfer rates are maximised as they are no longer limited by diffusion. The Laboratoire de Génie Chimique carries out investigations in microreactors for Reaction Engineering. This study is composed of tow parts and the main objectives are: • To establish a Liquid-liquid flow cartography for water droplets dispersed in PDMS oil in rectangular microchannels. Flow regimes were established for a variety of flow rate pairs of the continuous and dispersed phases. Droplet length, slug length and droplet velocity are determined by image analysis using a micro-PIV system. • To study the temperature profile inside a capillary tube in a heat exchanger device by an original calorimetric method.Outgoin

Communicative Language Testing: Implications for Computer Based Language Testing in French for Specific Purposes

[EN] Current evolutions of language testing have led to integrating computers in FSP assessments both in oral and written communicative tasks. This paper deals with two main issues: learners expectations about the types of questions in FSP computer based assessments and the relation with their own experience. This paper describes the experience of 23 freshmen French students enrolled in the Universitat Politecnica de Valencia who took a computer based version of a FSP test. Their attitudes were observed and annotated. The learners expressed their difficulties in taking a FSP computer delivered test. The paper suggests that the dramatic change between general French and French for Specific Purposes may imply significant differences in the students to the new computer context due to the changes in vocabulary, register and language use as well as computer ergonomics. The paper concludes: firstly, that basic notions of certain specialized forms and vocabulary should be introduced in high school; secondly, that FSP should tend to be more communicative and that FSP teaching should be more reflective and communicative than it may be in colleges at the moment; thirdly, that if computer based tests may be a valuable tool in FSP testing (Garcia Laborda et al, 2010), item choice and prompts should be carefully considered. The analysis hereby presented is contextualized in computer based language testing and is a relevant part of the OPENPAU (MINECO FFI2011-22442) project.The researchers would like to express their gratitude to the Ministry of Economy and Competitiveness (MINECO) with co-founding with ERDF funds under the 2008-2011 plan. for supporting the development and implementation of OPENPAU project (MINECO FFI2011-22442). The researchers would also like to than the participation of the Camille Research group of Universidad Politécnica de Valencia (Spain) for allowing Dr. López participate in this research and its evolutions from 2009 to 2013García Laborda, J.; López-Santiago, M.; Otero De Juan, N.; Alvarez Alvarez, A. (2014). Communicative Language Testing: Implications for Computer Based Language Testing in French for Specific Purposes. Journal of Language Teaching and Research (Online). 5(5):971-975. https://doi.org/10.4304/jltr.5.5.971-975S9719755

Technological Antecedents of Entrepreneurship and its Consequences for Organizational Performance

Under conditions of rapid change, companies compete intensely to achieve competitive advantages. Through technology, they differentiate themselves from other companies to obtain a better market position. Decisions concerning technological variables are thus essential to a firm’s overall competitive strategy, positioning and emplacement. Our research analyses how top management support for technology and technology skills enables technology acquisition, integration and infrastructure in firms, influencing organizational performance through corporate entrepreneurship. The analysis is performed using Structural Equation Model with a sample of 201 Spanish technological firms. The results show that awareness of technological issues enables entrepreneurship in the firm.This research was supported by the Regional Government of Andalusia’s Project (Ref.: P11-SEJ-7988)

Dental Treatment under General Anesthesia in Healthy and Medically Compromised/Developmentally Disabled Children: A Comparative Study

Aim: To compare the type, number of procedures and working time of dental treatment provided under dental general anesthesia (DGA) in healthy and medically compromised/developmentally disabled children (MCDD children). Design: This cross-sectional prospective study involved 80 children divided into two groups of 40 children each. Group 1 consisted of healthy and Group 2 consisted of MCDD children. Results: Healthy children needed more working time than MCDD children, the means being 161±7.9 and 84±5.7 minutes, respectively (P= 0.0001). Operative dentistry and endodontic treatments showed a significant statistical difference (P= 0.0001). The means of procedures were 17±5.0 for healthy children and 11±4.8 for MCDD children (P= 0.0001). Conclusions: Healthy children needed more extensive dental treatment than MCDD children under DGA. The information from this sample of Mexican children could be used as reference for determining trends both within a facility as well as in comparing facilities in cross-population studies

An overview on armor research for the laser fusion project HiPER

During the current preparatory phase of the European laser fusion project HiPER, an intensive effort has being placed to identify an armour material able to protect the internal walls of the chamber against the high thermal loads and high fluxes of x-rays and ions produced during the fusion explosions. This poster addresses the different threats and limitations of a poly-crystalline Tungsten armour. The analysis is carried out under the conditions of an experimental chamber hypothetically constructed to demonstrate laser fusion in a repetitive mode, subjected to a few thousand 48MJ shock ignition shots during its entire lifetime. If compared to the literature, an extrapolation of the thermomechanical and atomistic effects obtained from the simulations of the experimental chamber to the conditions of a Demo reactor (working 24/7 at hundreds of MW) or a future power plant (producing GW) suggests that “standard” tungsten will not be a suitable armour. Thus, new materials based on nano-structured W and C are being investigated as possible candidates. The research programme launched by the HiPER material team is introduced