Novetats

A Study of binary collision of GNF droplets using a conservative level-set method

UPCommons - dj., 03/14/2019 - 20:07
A Study of binary collision of GNF droplets using a conservative level-set method Amani, Ahmad; Balcázar Arciniega, Néstor Vinicio; Naseri, Alireza; Oliva Llena, Asensio In this study, numerical simulations of binary droplet collisions of two GNF droplets are carried out. Navier-Stokes equations are solved for fluid motion both inside and outside of the droplet using a conservative level-set/finite-volume approach. On headon collision of equal-sized droplets, implementation of symmetry boundary condition along with ghost nodes are used to mimic the behavior of the droplet colliding an image of itself while only one-eight of the domain being solved. A novel lamella stabilization approach is used which enables us to simulate extreme collision cases in relatively coarse meshes. The results are compared with available experimental and numerical results.
Categories: Novetats

LA UPC lidera un proyecto europeo del Horizonte 2020 para el fomento de la formación en el sector agrario

UPCommons - dj., 03/14/2019 - 19:50
LA UPC lidera un proyecto europeo del Horizonte 2020 para el fomento de la formación en el sector agrario Gil Moya, Emilio El nombre del proyecto deriva de los objetivos del mismo: Accelerating INNOvative practices for Spray Equipment, Training and Advising in European agriculture through the mobilization of agricultural knowledge and innovation systems.
Categories: Novetats

Spanish’s experience on improving inspection of sprayers: official manual for ISO 16122 and ISO 16119

UPCommons - dj., 03/14/2019 - 19:42
Spanish’s experience on improving inspection of sprayers: official manual for ISO 16122 and ISO 16119 Gil Moya, Emilio; Campos Tobajas, Javier; Ortega Rioja, Paula Mandatory inspections in Spain are organized following ISO 16122. In order to guarantee a clear and comprehensive inspection’s procedure in all of the official inspection’s workshops, the Spanish Ministry of Agriculture published an official inspection’s manual based on ISO 16122 in order to improve and harmonize the process.
Categories: Novetats

A level-set method for mass transfer in bubble swarms

UPCommons - dj., 03/14/2019 - 19:35
A level-set method for mass transfer in bubble swarms Balcázar Arciniega, Néstor Vinicio; Antepara Zambrano, Óscar; Castro González, Jesús; Oliva Llena, Asensio
Categories: Novetats

Reducing spray drift by adapting the spraying equipment to the canopy shape in olive orchards with isolated trees

UPCommons - dj., 03/14/2019 - 19:21
Reducing spray drift by adapting the spraying equipment to the canopy shape in olive orchards with isolated trees Miranda Fuentes, Antonio; Cuenca, Andrés; Godoy Nieto, Alberto; González Sánchez, Emilio J; Gil Moya, Emilio; LLorens, J.; Gil Ribes, Jesús A. The lack of specificity of the spraying equipment commonly used in olive orchards is a remarkable problem, for not allowing farmers to apply adjusted pesticide doses to their trees, making necessary to spray very high liquid volumes that increase the environmental pollution risk. In this context, three prototypes were specially developed to increase the application efficiency in olive orchards with isolated trees, which represent 98% of the olive harvested area in Spain.
Categories: Novetats

Pla general del públic assistent a l'acte de nomenament i investidura del Sr. Juli Esteban com a Doctor Honoris Causa per la UPC

UPCommons - dj., 03/14/2019 - 16:24
Pla general del públic assistent a l'acte de nomenament i investidura del Sr. Juli Esteban com a Doctor Honoris Causa per la UPC Pareto, Jordi
Categories: Novetats

Pla general del públic assegut en el pati de butaques durant el discurs d'investidura del Sr. Juli Esteban com a Doctor Honoris Causa per la UPC

UPCommons - dj., 03/14/2019 - 16:21
Pla general del públic assegut en el pati de butaques durant el discurs d'investidura del Sr. Juli Esteban com a Doctor Honoris Causa per la UPC Pareto, Jordi
Categories: Novetats

Comparison of visual and optical quality of monofocal versus multifocal intraocular lenses

UPCommons - dj., 03/14/2019 - 16:19
Comparison of visual and optical quality of monofocal versus multifocal intraocular lenses Altemir Gómez, I.; Millán Garcia-Varela, M. Sagrario; Vega Lerín, Fidel; Bartol Puyal, Francisco; Giménez Calvo, G.; Larrosa, Jose Manuel; Polo Llorens, Vicente; Pablo Júlvez, Luis E.; García Martín, Elena
Categories: Novetats

Pla de detall d'assistents a l'acte asseguts en el pati de butaques durant el discurs d'investidura del Sr. Juli Esteban com a Doctor Honoris Causa per la UPC

UPCommons - dj., 03/14/2019 - 16:17
Pla de detall d'assistents a l'acte asseguts en el pati de butaques durant el discurs d'investidura del Sr. Juli Esteban com a Doctor Honoris Causa per la UPC Pareto, Jordi
Categories: Novetats

The CHARME "Advanced Big Data Training School for Life Sciences": an example of good practices for training on current bioinformatics challenges

UPCommons - dj., 03/14/2019 - 16:13
The CHARME "Advanced Big Data Training School for Life Sciences": an example of good practices for training on current bioinformatics challenges Hoang, Yen; Pfeil, Juliane; Zagoršcak, Maja; Zdravevski, Eftim; Ramšak, Živa; Schulze, Sabrina K.; Papageorgiou, K.; Duarte López, Ariel; Pérez Casany, Marta The CHARME “Advanced Big Data Training School for Life Sciences” took place during 3-7 September 2018, at the Campus Nord of the Technical University of Catalonia (UPC) in Barcelona (ES). The school was organised by the Data Management Group (DAMA) of the UPC in collaboration with EMBnet as a follow-up of the first CHARME-EMBnet “Big Data Training School for Life Sciences”, held in Uppsala, Sweden, in September 2017. The learning objectives of the school were defined and agreed during the CHARME “Think Tank Hackathon” that was held in Ljubljana, Slovenia, in February 2018. This article explains in detail the step forward organisation of the training school, the covered contents and the interaction/relationships that thanks to this school have been established between the trainees, the trainers and the organisers.
Categories: Novetats

Direct numerical simulation of rising bubble with path instability

UPCommons - dc., 03/13/2019 - 19:51
Direct numerical simulation of rising bubble with path instability Antepara Zambrano, Óscar; Balcázar Arciniega, Néstor Vinicio; Rigola Serrano, Joaquim; Oliva Llena, Asensio Present research is focused on combining High- Performance Computing (HPC) and Direct Numerical Simulation (DNS) of two-phase flows, to study the dy- namic behavior of rising bubble whit path instabilities with moderate/high Reynolds numbers ( Re > 1000 ). The Navier-Stokes equations are discretized us- ing the finite-volume approach; the pressure-velocity coupling is solved using a fractional-step projec- tion method, whereas the conservative level-set (LS) methodology is used for interface capturing. Thus, mass conservation issue that is known to affect stan- dard LS methods is circumvented. Moreover, the spa- tial discretization of the computational domain em- ploys an Adaptive Mesh Refinement (AMR) strategy for the reduction of computational resources. In this work, buoyancy bubbles rising in the wob- bling regime are researched at Re = 1200 , where the characteristics of the path, bubble shape, and vortical structures in the wake are reported.
Categories: Novetats

On the solution of the problem of a drop falling against a plane by using a level set-moving mesh-immersed boundary method

UPCommons - dc., 03/13/2019 - 19:29
On the solution of the problem of a drop falling against a plane by using a level set-moving mesh-immersed boundary method Gutiérrez, Enrique; Favre, F.; Balcázar Arciniega, Néstor Vinicio; Rigola Serrano, Joaquim A coupled Conservative Level Set – Moving Mesh – Immersed Boundary method is formulated and validated against the three-dimensional gravity-driven falling drop problem. First, by employing Conservative Level-Set (CLS) method, the multiphase domain can be successfully handled, while the mass conservation is controlled. Then, by using an Arbitrary Lagrangian-Eulerian formulation (i.e. a moving mesh), the simulation domain can be optimized by reducing the domain size and by allowing an improved mesh, resulting in a computational resources saving. Finally, the use of an Immersed Boundary (IB) method allows to deal with intricate geometries. All these functionalities result in a versatile and robustness method to simulate bubbles/drops problems in complex geometries. The mentioned method was successfully used to thoroughly study the falling of a drop against a plane surface, providing detailed results including velocity evolution, mesh independence study, evolution of the vertical position of the drop, streamlines and vorticity fields, and profiles evolution.
Categories: Novetats

Assessing hypertemporal SENTINEL-1 COHERENCE maps for LAND COVER monitoring

UPCommons - dc., 03/13/2019 - 19:05
Assessing hypertemporal SENTINEL-1 COHERENCE maps for LAND COVER monitoring Vicente Guijalba, F.; Duro, Javier; Notarnicola, Claudia; Jacob, Alexander; Mallorquí Franquet, Jordi Joan; López Martínez, Carlos; Pottier, Eric; López Sánchez, Juan Manuel This paper presents the main concepts and the initial analysis of the ESA SEOM project SInCohMap “EXPLOITATION OF SENTINEL-1 INTERFEROMETRIC COHERENCE FOR LAND COVER AND VEGETATION MAPPING”. The project evaluates the performance of using the interferometric coherence of S-1 time series for land cover and vegetation mapping. One of the main objectives of the project is to quantify the impact in using S-1 InSAR (Interferometric Synthetic Aperture Radar) data relative to traditional land cover and vegetation mapping using optical data (especially Sentinel-2, hereafter named S-2) or SAR-based (Synthetic Aperture Radar) approaches. In this framework, a Round-Robin consultation is used to assess the performances of the different classification methodologies.
Categories: Novetats

Impactos segregatorios de la política habitacional llave “en mano” de la ciudad de Buenos Aires: una lectura en clave participativa

UPCommons - dc., 03/13/2019 - 18:52
Impactos segregatorios de la política habitacional llave “en mano” de la ciudad de Buenos Aires: una lectura en clave participativa Zapata, María Cecilia Este artículo analiza los resultados sociales y territoriales de la política de vivienda llave en mano ejecutada en los últimos años en la Ciudad de Buenos Aires. Problematiza, a partir de las dos tipologías de programas llave en mano (de demanda genérica y de demanda específica) cómo impactaron los procesos de diseño y construcción de las viviendas en la etapa del habitar de los destinatarios, y se evalúan los efectos en el uso cotidiano y apropiación que los destinatarios realizan de la vivienda, de los complejos habitacionales y los barrios de inserción. Se quiere dilucidar si estimularon –o no- procesos de integración y/o segregación socio-urbana. Se analizan tres casos: Programa Viví en tu Casa, Programa de Recuperación del Hábitat del Barrio de La Boca y el Programa de Rehabilitación de la Traza de la ExAu3, a partir de la utilización de una estrategia metodológica cualitativa que recupera información proveniente de fuentes de datos primarios y secundarios. Se verificó que, efectivamente, existen impactos en la etapa del habitar que encuentra matices si se trata de programas llave en mano orientados a una demanda específica o genérica y a si existieron o no instancias de participación social en su desarrollo. Programas con destinatarios identificados de antemano e instancias de participación social en las que los futuros destinatarios de las viviendas ejerzan reales tomas de decisión en la política repercuten en una mayor apropiación de la vivienda, el complejo y el barrio de inserción, habilitando mejores posibilidades de integración socio-urbana. En detrimento de esto, políticas de vivienda social formuladas de manera aislada por el Estado, sin contemplación alguna de los destinatarios de lo producido, potencian procesos de desapropiación y mayores posibilidades de segregación socio-urbana para sus destinatarios.; ENGLISH: This article analyze the results of the housing policy turnkey executed in recent years in the City of Buenos Aires (Argentina), social and territorial terms. Based on the two typologies of turnkey programs that promoted the state (of generic demand and specific demand), problematize how the design and construction processes of the turnkey dwellings impacted in the stage of dwelling of the recipients, and evaluate the effects on the daily use and appropriation that the recipients make of the housing, the housing complexes and the neighborhoods. We want to determine whether -or not- they stimulated socio-urban integration and/or segregation processes. For them, three case studies (Programa Viví en tu Casa, Programa de Recuperación del Hábitat del Barrio de la Boca y el Programa de Rehabilitación de la traza de la ExAu3) are analyzed based on the use of a qualitative methodological strategy that retrieves information from secondary and primary data sources. From the analysis it was verified that there are indeed impacts in the stage of living that finds nuances in the case of turnkey programs oriented to a specific or generic demand and to whether or not there were instances of social participation in their development. Programs with previously identified recipients and instances of social participation in which the future recipients of the houses exercise real decision-making in politics, impact on a greater appropriation of the housing, the complex and the insertion neighborhood, enabling better possibilities of socio-urban integration. To the detriment of this, social housing policies formulated in an isolated manner by the State, without any contemplation of the recipients of the produced, promote processes of expropriation and greater possibilities of socio-urban segregation for their recipients.
Categories: Novetats

Sensitivity to soil moisture of spaceborne GNSS-R observables

UPCommons - dc., 03/13/2019 - 18:29
Sensitivity to soil moisture of spaceborne GNSS-R observables Camps Carmona, Adriano José; Vall-Llossera Ferran, Mercedes Magdalena; Hyuk, Park; Portal González, Gerard; Rossato, Luciana The potential of GNSS-R techniques to estimate land surface parameters such as Soil Moisture (SM) is experimentally studied using 2014-2017 global data from the UK TechDemoSat-1 (TDS-1) mission. The approach is based on the analysis of the sensitivity to Soil Moisture of different observables extracted from the Delay Doppler Maps (DDM) computed by the SGR-ReSI instrument using the L1 (1575.42 MHz) left-hand circularly-polarized (LHCP) reflected signals emitted by navigation satellites. After quality-filtering the data (spacecraft not `in eclipse' and the direct signal not present in the DDM), topography filtering the data, correction for background noise, antenna pattern gain, different distance propagation factors, and vegetation attenuation, the sensitivity of different GNSS-R observables to SM and its dependence with incidence angle is analyzed.
Categories: Novetats

Segregación socio-territorial en la Región Metropolitana Buenos Aires (RMBA): controversias y aportes en torno a la cuantificación de la población en villas de emergencia y asentamientos precarios. Período 2001-2010

UPCommons - dc., 03/13/2019 - 18:20
Segregación socio-territorial en la Región Metropolitana Buenos Aires (RMBA): controversias y aportes en torno a la cuantificación de la población en villas de emergencia y asentamientos precarios. Período 2001-2010 Vergara Parra, Albano Blas Un modo de aproximarse al fenómeno de la segregación socio-territorial en una metrópoli es observando la evolución y tendencia de los dos extremos: esto es, asentamientos informales-precarios y urbanizaciones-barrios cerrados. En el caso de la Región Metropolitana Buenos Aires (RMBA) se ha sostenido que, durante la década pasada (2000-2010 se ha producido un crecimiento extraordinario de población en “villas de emergencia” y “asentamientos precarios”. Tales afirmaciones conllevaron a una serie de controversias en torno al dimensionamiento y evolución de dicha población. El presente artículo se focalizará en uno de los polos del fenómeno de la segregación socio-territorial, referido a la cuantificación del universo de análisis “villas de emergencia y asentamientos precarios” en la RMBA. En una primera parte se abordan los aspectos teóricometodológico relativos al problema de la medición de dicho universo. En una segunda, se analizan las mediciones y estimaciones disponibles sintetizando las diversas fuentes de información existentes (oficiales y no oficiales) con el objeto de comparar variaciones y diferencias. En una tercera, se efectúa una aproximación indirecta del universo de análisis a partir del uso de una metodología propia que utiliza los micro-datos censales de 2001 y 2010. Por último, se proponen una serie de conclusiones en base al análisis realizado.; ENGLISH: One way of approaching the phenomenon of urban segregation is to observe the evolution and the trend of the two extremes: informal settlements and gated communities. In the case of the Buenos Aires Metropolitan Region, it has been argued that during the previous decade there has been an extraordinary increase in population in informal settlements. Such statements led to a series of controversies about the size and evolution of this population. This article will focus on one of the poles of the phenomenon of socio-territorial segregation, referring to the quantification of the universe of analysis informal settlements in the Buenos Aires Metropolitan Region. In the first part, the theoretical-methodological aspects related to the problem of measuring the universe are discussed. In a second, the available measurements and estimates are analyzed by synthesizing the various sources of information (official and unofficial) in order to compare variations and differences. In a third, an indirect approximation of the universe of analysis is made based on the use of an own methodology that uses the micro- data of populatio census 2001 and 2010. Finally, a series of conclusions are proposed based on the analysis carried out.
Categories: Novetats

Consumos, velocidades y distancias

UPCommons - dc., 03/13/2019 - 17:30
Consumos, velocidades y distancias Pérez del Río, José Pérez del Río, José.. Consumos, velocidades y distancias. a: Albatros. 1945, nº 5, p. 118-121
Categories: Novetats

Carta abierta a los Jefes y Oficiales de Máquinas de la Marina Mercante

UPCommons - dc., 03/13/2019 - 17:17
Carta abierta a los Jefes y Oficiales de Máquinas de la Marina Mercante Pérez del Río, José Pérez del Río. José. Carta abierta a los Jefes y Oficiales de Máquinas de la Marina Mercante a: Albatros. 1945, nº 6-7, p. 35
Categories: Novetats

PMK : a knowledge processing framework for autonomous robotics perception and manipulation

UPCommons - dc., 03/13/2019 - 17:07
PMK : a knowledge processing framework for autonomous robotics perception and manipulation Diab, Mohammed; Akbari, Aliakbar; Ud Din, Muhayy; Rosell Gratacòs, Jan Autonomous indoor service robots are supposed to accomplish tasks, like serve a cup, which involve manipulation actions. Particularly, for complex manipulation tasks which are subject to geometric constraints, spatial information and a rich semantic knowledge about objects, types, and functionality are required, together with the way in which these objects can be manipulated. In this line, this paper presents an ontological-based reasoning framework called Perception and Manipulation Knowledge (PMK) that includes: (1) the modeling of the environment in a standardized way to provide common vocabularies for information exchange in human-robot or robot-robot collaboration, (2) a sensory module to perceive the objects in the environment and assert the ontological knowledge, (3) an evaluation-based analysis of the situation of the objects in the environment, in order to enhance the planning of manipulation tasks. The paper describes the concepts and the implementation of PMK, and presents an example demonstrating the range of information the framework can provide for autonomous robots.
Categories: Novetats

Albatros

UPCommons - dc., 03/13/2019 - 16:55
Albatros Escuela Oficial de Náutica de Barcelona
Categories: Novetats

Pàgines

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