Research stay of Andrea di Filippo at the research group TIDOP

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The reseacher Andrea di Filippo ends his stay at the research group TIDOP

 

Andrea di Filippo, graduated with honors in Architecture and Building Engineering at the University of Salerno with the thesis “Mobile device application for architectural survey, from acquisition to data sharing. The case study of the ducal castle of Bisaccia” (Supervisor: Prof. Salvatore Barba), has conducted traineeship activities at the Tidop Research Group from September 2017 to March 2018. His research focused on the theoretical-practical principles and on the empirical experimentation of detection and return procedures in the field of digital survey. In particular, he dedicated himself to the formalization of a procedural pipeline in data acquisition and management from mobile mapping systems using the full-SLAM approach. The results achieved have been condensed into a technical note submitted to an impact journal. Other applications have involved 3D modeling starting from a point cloud and the development of BIM models aimed at enhancing and safeguarding the architectural heritage. The University of Salamanca has then requested the extension of his stay for three months – from April to June 2018 – in order to develop a collaboration with the local Department of Cartography and Engineering of the Territory. In this period he took part in several European projects such as “HeritageCare” and “Cultural Heritage Through Time” having the opportunity to expand its wealth of knowledge.

 

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Research stay of Jocelyn Le-Maitre at the research group TIDOP

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The Young reseacher Jocelyn Le Maitre carried out a short stay at the research group TIDOP

 

Jocelyn Le Maitre, a second-year engineering student at the National School of Geographical Sciences (ENSG, Paris), completed his multidisciplinary internship with the research group TIDOP, specialized in geomatics. During this 10.5 week internship, he learned to manipulate the various geotechnologies used by the group in the context of the preventive conservation of historical and cultural heritage. Thus, he realized the acquisition and processing of photographs and 3D point clouds using the hardware and software provided by the TIDOP group. These data were then used to create virtual tours to get around and recover various information about monuments of interest for the group.

Jocelyn Le Maitre worked on the following sites:

  • The city wall of Avila
  • TheHistorical Building of the University of Salamanca
  • The Veton site of Ulaca

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Research stay of Iosvany Recio at the research group TIDOP

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Iosvany Alberto Recio Villa, engineer and researcher from the Technological University of Havana ¨José Antonio Echeverría¨, (CUJAE) has developed a pre-doctoral research stay in the Higher Polytechnic School of Ávila, specifically in the Hydraulic Engineer Area since February to June 2018. The stay has been possible due to the scholarship: ¨Scholarship Programme for Young Professors and Researchers from Latin American Universities 2017¨ granted by the Coimbra Group. The professor and researcher of the group TIDOP Dr. José Luis Molina González was the tutor and gave a great support in the research.

During the research stay he has achieved advances in his PhD Thesis. This is focused in the water resource management, mainly in reservoir operation. The main objective of this research is to develop a mathematical model for optimal multipurpose reservoir operation with carryover storage. The optimization model has a multi-objective scope and is able to determine:

1- How much water should release the reservoir in each time period?

2- How to get the guide curves and operating rule for long term reservoir operation?

3- How much water should be holding on the reservoir for future uses?

The main achievement of the stay and the research during the four month was the publication of a paper in the journal Water. This paper could seen on the following links:

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The proposed model is able to define the optimal operating policy of the reservoir because it provides the monthly amount of water that the reservoir should release in each time period in order to minimize the water deficit on the user. This automatically provides the guide curves and operating rules for long-term reservoir operation, and determines the magnitude of the carryover storage. This content is very original and important, because it is a volume that ought to be held on the reservoir for future uses. Second, the monthly energy generation schedule proposed by the model is the goal for the hydroelectric real-time operation, and provides a guide for the reservoir operators for reaching the proposed benefit. Third, the operation graph of the Céspedes reservoir provides an effective tool for reservoir management during real-time operation. Consequently, it provides a mechanism for controlling the releases and the storage of the reservoir according to the time of the year. Another advantage of this graph is that it includes guide curves and operating rules that are used as a trigger indicator to start different measures or actions in the reservoir. Reservoir operators commonly use these during the real-time operation.

Collaboration Stay of Cristina Sáez Blázquez at Polytechnic University of Turin (Italy)

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The PhD researcher Cristina Sáez Blázquez is doing at the present moment a research stay in the Polytechnic University of Turin, in the north of Italy. The mentioned stay, that started the past October (October-December 2017), constitutes an essential tool in the progress of the researcher doctoral thesis. Over the stay, the researcher, collaborating with professors and researches of the Italian University, is analysing the main parameters that take part in open geothermal systems. In particular, the research is focused on the study of a real case placed in the province of Turin. In this way, the process which happen in such installations are being optimized using the software COMSOL Multiphysics. The results of the collaboration that is being developed, will be presented as scientifically works in relevant JCR journals.

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Análisis termográfico de edificios

 

El uso de la termografía infrarroja comMapaEnergeticoo técnica sobradamente provada para la inspección de edificios y localización de patologías como fugas de aire, humedades, etc. Nos permite realizar un examen visual “in-situ” de calidad de los objetos de estudio gracias a la posibilidad de visualizar en tiempo real los resultados pudiendo detectar sin dificultad los desperfectos o elementos característicos de estos. Estas técnicas de medición cualitativa nos proporcionan la posibilidad de realizar inspecciones rápidas y eficaces sin contacto directo con el objeto y de forma no destructiva, lo que disminuye tanto el riesgo de incidentes para los operarios como los daños producidos en los propios objetos de estudio ocasionados por otras técnicas intrusivas. Además, también se ha demostrado la utilidad de la termografía infrarroja como técnica puramente de medida a través de su utilización para el cálculo de propiedades termofísicas de materiales tales como difusividad y transmitancia térmica.

En el caso de termografía cualitativa, las publicaciones existentes tratan de estudios realizados in-situ, principalmente en edificios históricos o elementos del patrimonio cultural, mientras que los estudios cualitativos se realizan, en la mayor parte de los casos, en laboratorios sobre muestras de tamaño limitado. En aquellos casos en los que se han realizado estudios termográficos cuantitativos sobre edificios in-situ, los valores de temperatura son empleados con el objetivo de obtener propiedades termofísicas (conductancia térmica) reales del cerramiento, sin embargo su distribución espacial no es considerada.

Conjugar ambas aplicaciones permitirá la automatización del cálculo de pérdidas de calor a partir de las temperaturas medidas con una cámara termográfica. De este modo, no solo se usa la termografía para representar el estado de la pared, sino que también se usan los valores de temperatura contenidos en la termografía para la extracción de parámetros métricos del edificio en estudio, por lo que la hibridación de la información termográfica con el material cartográfico de precisión permitiría extraer la geometría real del objeto de estudio con textura termográfica, pudiendo así realizar mediciones precisas de los elementos de interés directamente sobre el resultado obtenido.

 

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Estudios como el publicado por EuroACE en 2010 colocan la mejora de la eficiencia energética en edificación en cabeza de las acciones necesarias para la reducción de emisiones de gases del efecto invernadero y gasto energético, así como para servir de empuje a la generación de empleo. Especial es el caso del parque de edificios ya construidos, la mayoría procedente de los años 1940-80, con normativa inexistente y recursos escasos. En ellos las obras de rehabilitación energética pueden suponer un ahorro de hasta el 75% en consumo de energía. En España existen 13 millones de viviendas susceptibles de intervención, cuya rehabilitación energética supondría una reducción de las emisiones del sector del 34% con respecto al año 2001.

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Building thermographic analysis

 

 

The use of infraMapaEnergeticored thermography as a widely tested technique for building inspection and location of pathologies such as air leakage and moisture allows the performance of  quality “in-situ” visual examination of the objects under study due to the possibility of obtaining real-time results, being able to detect without difficulty damages or material characteristics. This qualitative measurement technique provides the capability of doing quick, effective and non-destructive inspection without direct contact with the object under study, decreasing the risk of incidents to operators and the damage of the objects comparing with other intrusive techniques. Furthermore, the utility of infrared thermography as a measurement technique has been proved by its use for the determination of the thermophysical properties of materials such as diffusivity and thermal transmittance.

In the qualitative approach, some authors have performed in-situ studies, mainly in historical buildings or cultural heritage elements, whereas quantitative studies are performed mainly in laboratories with limited size samples. In those cases where quantitative thermography studies were performed in-situ, temperature values were employed in order to obtain the real thermophysical properties (thermal conductance) of the building envelope, but their spatial distribution is not considered.

Combine both applications will enable the automation of the heat loss computation from the measured temperatures with a thermographic camera. Thus, the thermography is not only used to represent the state of the wall, but also temperature values represented on the thermography for extracting the metric parameters of the study object so the hybridization of the thermographic information with precise cartographic material would  allow to extract the actual geometry of the object of study with thermal texture, being able to make accurate measurements of the elements of interest directly on the obtained results.

 

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Studies such as the one published by EuroACE in 2010, places improved energy efficiency in building construction at the top of the list of actions that need to be taken to reduce greenhouse gases and energy costs, in addition to acting as a stimulus to generate employment. In particular is the case of existing buildings stock, most of which dates back to the period 1940-80, constructed using non-existent standards and scarce resources. Here, energy refurbishment works could represent a saving of up to 75% in energy consumption. In Spain there are 13 million homes that could be the subject of intervention, where energy refurbishment could result in a reduction in sector emissions of 34% compared to 2001.

 

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Mobile Laser System (MLS) applied to urban tree inventory

In urbanized Western Europe trees are considered an important component of the built-up environment. This also means that there is an increasing demand for tree inventories. Laser mobile mapping systems provide an efficient and accurate way to sample the 3D road surrounding including notable roadside trees. In this research line, a processing chain aiming at the extraction of tree locations and tree sizes from laser mobile mapping data is reached.

  • Vegetation extraction

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  • Tree parameter extraction

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Such steps, in combination with code optimization are expected to be sufficient to reach the final goal of automatized estimation of features sampled by mobile mapping at a rate that matches the acquisition speed and at a quality that matches the result of a human operator.

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