UPCommons

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UPCommons, el portal d'accés obert al coneixement de la UPC, està format pel conjunt de dipòsits institucionals oberts de la UPC i té com a missió garantir la preservació de la producció docent i de recerca cientificotècnica de la Universitat, maximitzant-ne la visibilitat i, conseqüentment, incrementant-ne l’impacte en la docència i la recerca de tot el món.
Actualitzat: fa 38 minuts 5 segons

Portafoli d'arquitectura. Aprenent a veure : reflexió acadèmica i professional.

dj., 02/15/2018 - 14:50
Portafoli d'arquitectura. Aprenent a veure : reflexió acadèmica i professional. Carrión Fatjó, Mariona
Categories: Novetats

Portfolio. Academic essay.

dj., 02/15/2018 - 14:44
Portfolio. Academic essay. Chen, Wenyu
Categories: Novetats

Enabling Python to execute efficiently in heterogeneous distributed infrastructures with PyCOMPSs

dj., 02/15/2018 - 13:25
Enabling Python to execute efficiently in heterogeneous distributed infrastructures with PyCOMPSs Amela, Ramon; Ramón-Cortes, Cristian; Ejarque, Jorge; Conejero, Javier; Badia, Rosa M. Python has been adopted as programming language by a large number of scientific communities. Additionally to the easy programming interface, the large number of libraries and modules that have been made available by a large number of contributors, have taken this language to the top of the list of the most popular programming languages in scientific applications. However, one main drawback of Python is the lack of support for concurrency or parallelism. PyCOMPSs is a proved approach to support task-based parallelism in Python that enables applications to be executed in parallel in distributed computing platforms. This paper presents PyCOMPSs and how it has been tailored to execute tasks in heterogeneous and multi-threaded environments. We present an approach to combine the task-level parallelism provided by PyCOMPSs with the thread-level parallelism provided by MKL. Performance and behavioral results in distributed computing heterogeneous clusters show the benefits and capabilities of PyCOMPSs in both HPC and Big Data infrastructures.
Categories: Novetats

Com reservar un document al catàleg

dj., 02/15/2018 - 12:46
Com reservar un document al catàleg Biblioteca del Campus de Terrassa En aquest tutorial es mostra com reservar un document al catàleg de Biblioteques UPC. Subtítols en anglès, castellà i català.
Categories: Novetats

Com cercar un document a les biblioteques UPC amb l'opció de cerca avançada

dj., 02/15/2018 - 12:37
Com cercar un document a les biblioteques UPC amb l'opció de cerca avançada Biblioteca del Campus de Terrassa En aquest tutorial s'explica com cercar un document a les biblioteques UPC amb l'opció de cerca avançada. Subtítols en català, castellà i anglès a YouTube.
Categories: Novetats

The parallel complexity of positive linear programming

dj., 02/15/2018 - 12:36
The parallel complexity of positive linear programming Trevisan, Luca; Xhafa Xhafa, Fatos In this paper we study the parallel complexity of Positive Linear Programming (PLP), i.e. the special case of Linear Programming in packing/covering form where the input constraint matrix and constraint vector consist entirely of positive entries. We show that the problem of exactly solving PLP is P-complete.
Categories: Novetats

Comparison of full field and anomaly initialisation for decadal climate prediction: towards an optimal consistency between the ocean and sea-ice anomaly initialisation state

dj., 02/15/2018 - 12:12
Comparison of full field and anomaly initialisation for decadal climate prediction: towards an optimal consistency between the ocean and sea-ice anomaly initialisation state Volpi, Danila; Guemas, Virginie; Doblas-Reyes, Francisco J. Decadal prediction exploits sources of predictability from both the internal variability through the initialisation of the climate model from observational estimates, and the external radiative forcings. When a model is initialised with the observed state at the initial time step (Full Field Initialisation—FFI), the forecast run drifts towards the biased model climate. Distinguishing between the climate signal to be predicted and the model drift is a challenging task, because the application of a-posteriori bias correction has the risk of removing part of the variability signal. The anomaly initialisation (AI) technique aims at addressing the drift issue by answering the following question: if the model is allowed to start close to its own attractor (i.e. its biased world), but the phase of the simulated variability is constrained toward the contemporaneous observed one at the initialisation time, does the prediction skill improve? The relative merits of the FFI and AI techniques applied respectively to the ocean component and the ocean and sea ice components simultaneously in the EC-Earth global coupled model are assessed. For both strategies the initialised hindcasts show better skill than historical simulations for the ocean heat content and AMOC along the first two forecast years, for sea ice and PDO along the first forecast year, while for AMO the improvements are statistically significant for the first two forecast years. The AI in the ocean and sea ice components significantly improves the skill of the Arctic sea surface temperature over the FFI.
Categories: Novetats

Analyzing the impact of communication imbalance in high-speed networks

dj., 02/15/2018 - 11:05
Analyzing the impact of communication imbalance in high-speed networks Utrera Iglesias, Gladys Miriam; Gil, Marisa; Martorell Bofill, Xavier In this work we analyze the communication load imbalance generated by irregular-data applications running in a multi-node cluster. Experimental approaches to diminish communication load imbalance are evaluated using a hybrid programming model MPI+OpenMP including certain optimizations like computation-communication overlap, issuing communications in parallel and a new proposal based on message fragmentation in order to take advantage of the eager-protocol. Performance results show that overlapped versions can obtain a great benefit of this optimization because it avoids switching to rendez-vous protocols. However, non-overlapped versions showed better performance than overlapped ones. To evaluate also the impact due to network latency, the work has been tested on two high-speed interconnection networks: Infiniband and 10Gigabit Ethernet. In this case, the optimizations in the non-overlapped miniFE benchmark reached and improvement up to 7% on Infiniband and 11% on 10Gigabit.
Categories: Novetats

Mecanismos de barras con leva de anchura constante incorporada y balancín de doble detención ajustable

dj., 02/15/2018 - 09:50
Mecanismos de barras con leva de anchura constante incorporada y balancín de doble detención ajustable Cardona Foix, Salvador; Zayas Figueras, Enrique Ernesto; Jordi Nebot, Lluïsa; Puig Ortiz, Joan En los mecanismos que incluyen barras y levas, en general el palpador de la leva es de rotación o de translación y posiciona algún elemento, a menudo una articulación, del mecanismo de barras. En el mecanismo que se estudia, el palpador forma parte de una biela del mecanismo de barras por lo que tiene un movimiento complejo de rotación y translación. La leva es de anchura constante y el palpador es doble de caras paralelas, con lo que el mecanismo no requiere muelles para garantizar el cierre del par superior. El mecanismo dispone de un segundo par superior, guía-botón, de orientación ajustable externamente y que permite definir la amplitud de oscilación, entre tramos de reposo, del balancín terminal del mecanismo. En el trabajo que se presenta, se expone como realizar el análisis cinemático analítico de configuraciones y velocidades utilizando la condición de cierres de anillos y la condición de tangencia en el contacto leva-palpador. La elección del perfil de la leva permite obtener intervalos de estricto reposo del balancín, no obtenibles con mecanismos únicamente de barras. Se muestran los resultados obtenidos en este análisis y también los índices clásicos de prestaciones del mecanismo: ángulo y relación de transmisión y ángulo de presión en la leva. A partir de los resultados obtenidos se discute y concluye la bondad del procedimiento utilizado para el análisis de los mecanismos combinados de barras y levas.
Categories: Novetats

Multiresponse optimization of surface finish and productivity in honing processes

dc., 02/14/2018 - 21:13
Multiresponse optimization of surface finish and productivity in honing processes Valdivieso Muñoz, Miguel Ángel
Categories: Novetats

Guia temàtica Biblioteca ETSAB: Dones arquitectes

dc., 02/14/2018 - 19:29
Guia temàtica Biblioteca ETSAB: Dones arquitectes Escola Tècnica Superior d'Arquitectura de Barcelona. Biblioteca La selecció de documents llibres d’aquesta guia està inspirada en el joc de cartes i en la següent web on es pot trobar informació sobre les arquitectes de la guia i moltes altres arquitectes: "Un día, una arquitecta" (https://undiaunaarquitecta.wordpress.com). Aquesta web té com a objectiu fer visible l’aportació de les arquitectes en diferents àrees: projecte arquitectònic, urbà i paisatgístic, tecnologia, publicacions, producció artística, política, gestió de l’hàbitat social, teoria i ensenyament.
Categories: Novetats

On the existence of representative volumes for softening quasi-brittle materials: a failure zone averaging scheme

dc., 02/14/2018 - 17:29
On the existence of representative volumes for softening quasi-brittle materials: a failure zone averaging scheme Nguyen, Vinh Phu; Lloberas Valls, Oriol; Stroeven, Martijn; Sluys, Lambertus J. The concept of the representative volume element (RVE) for softening materials is revised in this contribution. It is demonstrated by means of numerical simulations that there exists a sample which is statistically representative for quasi-brittle materials with random microstructure like concrete. This finding is an important ingredient for homogenization-based multiscale modelling of softening materials.
Categories: Novetats

Homogenization-based multiscale crack modelling: from micro-diffusive damage to macro-cracks

dc., 02/14/2018 - 17:22
Homogenization-based multiscale crack modelling: from micro-diffusive damage to macro-cracks Nguyen, Vinh Phu; Lloberas Valls, Oriol; Stroeven, Martijn; Sluys, Lambertus J. The existence of a representative volume element (RVE) for a class of quasi-brittle materials having a random heterogeneous microstructure in tensile, shear and mixed mode loading is demonstrated by deriving traction–separation relations, which are objective with respect to RVE size. A computational homogenization based multiscale crack modelling framework, implemented in an FE2 setting, for quasi-brittle solids with complex random microstructure is presented. The objectivity of the macroscopic response to the micro-sample size is shown by numerical simulations. Therefore, a homogenization scheme, which is objective with respect to macroscopic discretization and microscopic sample size, is devised. Numerical examples including a comparison with direct numerical simulation are given to demonstrate the performance of the proposed method.
Categories: Novetats

Computational homogenization for multiscale crack modeling: implementational and computational aspects

dc., 02/14/2018 - 17:15
Computational homogenization for multiscale crack modeling: implementational and computational aspects Nguyen, Vinh Phu; Lloberas Valls, Oriol; Sluys, Lambertus J.; Stroeven, Martijn A computational homogenization procedure for cohesive and adhesive crack modeling of materials with a heterogeneous microstructure has been recently presented in Computer Methods in Applied Mechanics and Engineering (2010, DOI:10.1016/j.cma.2010.10.013). The macroscopic material properties of the cohesive cracks are obtained from the inelastic deformation manifested in a localization band (modeled with a continuum damage theory) at the microscopic scale. The macroscopic behavior of the adhesive crack is derived from the response of a microscale sample representing the microstructure inside the adhesive crack. In this manuscript, we extend the theory presented in Computer Methods in Applied Mechanics and Engineering (2010, DOI:10.1016/j.cma.2010.10.013) with implementation details, solutions for cyclic loading, crack propagation, numerical analysis of the convergence characteristics of the multiscale method, and treatment of macroscopic snapback in a multiscale simulation. Numerical examples including crack growth simulations with extended finite elements are given to demonstrate the performance of the method This is the peer reviewed version of the following article: [Nguyen, V. P., Lloberas-Valls, O., Stroeven, M. and Sluys, L. J. (2012), Computational homogenization for multiscale crack modeling. Implementational and computational aspects. Int. J. Numer. Meth. Engng, 89: 192–226. doi:10.1002/nme.3237], which has been published in final form at http://onlinelibrary.wiley.com/doi/10.1002/nme.3237/abstract. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving
Categories: Novetats

Dinámica de gases

dc., 02/14/2018 - 17:12
Dinámica de gases Virto Albert, Luis El propósito que se persigue con la edición de este libro es que sirva de orientación y primera aproximación a los conocimientos que el ingeniero o el técnico, en sus inicios profesionales, así como los estudiantes de grado o de doctorado, puedan necesitar para enfocar correctamente sus proyectos, o bien para orientar y apoyar sus estudios. Se ha elaborado a partir de los conocimientos del autor sobre la materia, con aportaciones de las obras consideradas seminales sobre cada tema, así como de las publicaciones técnico-científicas de indudable relevancia. Descripció del recurs: 5 de febrer de 2018
Categories: Novetats

Residència d'estudiants UAB Sabadell

dc., 02/14/2018 - 15:44
Residència d'estudiants UAB Sabadell Domènech Crusellas, Albert El projecte proposa una residència d'estudiants per al Campus de Sabadell de la Universitat Autònoma de Barcelona, restaurant un antic vapor que conserva la seva xemeneia, patrimoni de la ciutat. Com a objectius hi ha restaurar l’antiga fàbrica per transformar-la en un lloc habitable, i construir un edifici nou de residències aprofitant l’actual expropiació de la zona.
Categories: Novetats

La rehabilitación del patrimonio arquitectónico y edificado como proceso dialógico

dc., 02/14/2018 - 15:41
La rehabilitación del patrimonio arquitectónico y edificado como proceso dialógico Saura Carulla, Magdalena; Muntañola Thornberg, Josep Este escrito pretende sintetizar unos años de investigación sobre el tema de las relaciones entre edificios ya edificados, de mayor o menor valor cultural, y los nuevos proyectos arquitectónicos o urbanísticos. Es pues un tema que intenta analizar la articulación entre proyecto e historia. Lo hace desde una perspectiva dialógica, debido al enorme impulso que este paradigma de las ciencias sociales ha conseguido tener en los últimos años (1), gracias a la difusión de las obras del intelectual ruso Mijaíl BajtÍn. El texto empieza por describir brevemente el estado de la cuestión, desde la conocida polémica entre Ruskin y Viollet-le-duc (2), hasta llegar, en un segundo capítulo, a las definiciones de un paradigma dialógico en arquitectura y urbanismo. Por último, unos ejemplos breves intentan ilustrar un paradigma dialógico abierto al futuro.
Categories: Novetats

APACHE - Review of current KPIs and proposal for new ones

dc., 02/14/2018 - 15:22
APACHE - Review of current KPIs and proposal for new ones Prats Menéndez, Xavier; Netjasov, Fedja; Mirkovic, Bojana; Pavlovic, Goran; Babic, Obrad; Barrado Muxí, Cristina; Ansaldo, Georgina; Costa, Maria Inês; Vidosavljevic, Andrija The main objective of this report is to review the current KPIs and PIs used by the SESAR, Performance Review Body (PRB) and other relevant institutions and to propose new PIs which could be measured using the new framework proposed by the APACHE project. For this purpose, past reports and guidance material is reviewed in order to determine which KPAs are covered and specific KPIs/PIs used in Europe. Apart from that, relevant ICAO and CANSO documents are also reviewed, among others. Special attention is given to SESAR Performance Framework which is quite specific in its purpose and perspective as it aims to estimate the performance benefits of SESAR solutions before the execution phase of operations, which is in line with the APACHE project as it focuses mainly on Pre-OPS ATM performance assessment. Based on current KPIs/PIs review and objectives of ATM performance assessment framework from WP2, a set of novel PIs which could be measured using new framework introduced by the APACHE project are proposed in collaboration with the SJU and the PRB considering their valuable feedback. From this assessment, the APACHE System will implement a total of 42 new (or enhanced) performance indicators (25 main indicators and 17 variants). This Report1 is part of a project that has received funding from the SESAR Joint Undertaking under grant agreement No 699338 under European Union’s Horizon 2020 research and innovation programme.
Categories: Novetats

Remote monitoring and supervision of airdromes and heliports: meteorological information

dc., 02/14/2018 - 15:04
Remote monitoring and supervision of airdromes and heliports: meteorological information Xart Terradellas, Berta In this project, we will focus in the meteorological information to be provided by automatic systems to the users of small airdromes and heliports, which are monitored and supervised from a remote control center. We will take into account the regulations and requirements issued from each aeronautical authority in order to accomplish its rules and regulations and assuring the quality and the accuracy of the data provided. This work will be applied to the Cerdanya Aerodrome, located in the municipality of Das, and to the Tirvia's heliport, located in this little town in the Pallars Sobirà. The first is a small aerodrome open to the general aviation, and the second is a heliport owned by the Catalan government devoted to emergency services, with no official information published. The meteorological data obtained from the meteorological stations, similar to the installed by the Catalan meteorological agency -Meteocat-, placed in each aerodrome and heliport, will be processed and coded according to the aeronautical standard systems, and then send to the aerodrome and heliport users.
Categories: Novetats

Building bridges for innovation in ageing: Synergies between action groups of the EIP on AHA

dc., 02/14/2018 - 11:37
Building bridges for innovation in ageing: Synergies between action groups of the EIP on AHA Bousquet, Jean; Bewick, M.; Cano, A.; Català Mallofré, Andreu The Strategic Implementation Plan of the European Innovation Partnership on Active and Healthy Ageing (EIP on AHA) proposed six Action Groups. After almost three years of activity, many achievements have been obtained through commitments or collaborative work of the Action Groups. However, they have often worked in silos and, consequently, synergies between Action Groups have been proposed to strengthen the triple win of the EIP on AHA. The paper presents the methodology and current status of the Task Force on EIP on AHA synergies. Synergies are in line with the Action Groups’ new Renovated Action Plan (2016-2018) to ensure that their future objectives are coherent and fully connected. The outcomes and impact of synergies are using the Monitoring and Assessment Framework for the EIP on AHA (MAFEIP). Eight proposals for synergies have been approved by the Task Force: Five cross-cutting synergies which can be used for all current and future synergies as they consider overarching domains (appropriate polypharmacy, citizen empowerment, teaching and coaching on AHA, deployment of synergies to EU regions, Responsible Research and Innovation), and three cross-cutting synergies focussing on current Action Group activities (falls, frailty, integrated care and chronic respiratory diseases). This is a post-peer-review, pre-copyedit version of an article published in The journal of nutrition, health & aging. The final authenticated version is available online at: http://dx.doi.org/10.1007/s12603-016-0803-1
Categories: Novetats

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