Estimation of the Precision of a Structured Light System in Oil Paintings on Canvas

[EN] The conservation and authentication of pictorial artworks is considered an important part of the preservation of cultural heritage. The use of non-destructive testing allows the obtention of accurate information about the state of pictorial artworks without direct contact between the equipment used and the sample. In particular, the use of this kind of technology is recommended in obtaining three-dimensional surface digital models, as it provides high-resolution information that constitutes a kind of fingerprint of the samples. In the case of pictorial artworks with some kind of surface relief, one of the most useful technologies is structured light (SL). In this paper, the minimum difference in height that can be distinguished with this technology was estimated, establishing experimentally both the error committed in the measurement process and the precision in the use of this technology. This study focused on the case of oil paintings on canvas and developed a low-cost system to ensure its wide use.Sánchez-Jiménez, D.; Buchón Moragues, FF.; Bravo, JM.; Sánchez Pérez, JV. (2019). Estimation of the Precision of a Structured Light System in Oil Paintings on Canvas. Sensors. 19(22):1-13. https://doi.org/10.3390/s19224966S1131922Abate, D., Menna, F., Remondino, F., & Gattari, M. G. (2014). 3D painting documentation: evaluation of conservation conditions with 3D imaging and ranging techniques. The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, XL-5, 1-8. doi:10.5194/isprsarchives-xl-5-1-2014Pelagotti, A., Uccheddu, F., Massa, E., & Carfagni, M. (2018). Comparing two 3D measurement techniques for documenting painted wooden panels surface deformations on a real test case: «Mystical Marriage of Saint Catherine» by Renaissance artist Piero di Cosimo. IOP Conference Series: Materials Science and Engineering, 364, 012090. doi:10.1088/1757-899x/364/1/012090Ambrosini, D., Daffara, C., Di Biase, R., Paoletti, D., Pezzati, L., Bellucci, R., & Bettini, F. (2010). Integrated reflectography and thermography for wooden paintings diagnostics. Journal of Cultural Heritage, 11(2), 196-204. doi:10.1016/j.culher.2009.05.001Legrand, S., Vanmeert, F., Van der Snickt, G., Alfeld, M., De Nolf, W., Dik, J., & Janssens, K. (2014). Examination of historical paintings by state-of-the-art hyperspectral imaging methods: from scanning infra-red spectroscopy to computed X-ray laminography. Heritage Science, 2(1). doi:10.1186/2050-7445-2-13Bravo, J., Sánchez-Pérez, J., Ferri, M., Redondo, J., & Picó, R. (2014). Application of Ultrasound Phase-Shift Analysis to Authenticate Wooden Panel Paintings. Sensors, 14(5), 7992-8002. doi:10.3390/s140507992Remondino, F., Rizzi, A., Barazzetti, L., Scaioni, M., Fassi, F., Brumana, R., & Pelagotti, A. (2011). Review of Geometric and Radiometric Analyses of Paintings. The Photogrammetric Record, 26(136), 439-461. doi:10.1111/j.1477-9730.2011.00664.xBuchón-Moragues, F., Bravo, J., Ferri, M., Redondo, J., & Sánchez-Pérez, J. (2016). Application of Structured Light System Technique for Authentication of Wooden Panel Paintings. Sensors, 16(6), 881. doi:10.3390/s16060881Tian, G. Y., Lu, R. S., & Gledhill, D. (2007). Surface measurement using active vision and light scattering. Optics and Lasers in Engineering, 45(1), 131-139. doi:10.1016/j.optlaseng.2006.03.005Secher, J. J., Darvann, T. A., & Pinholt, E. M. (2017). Accuracy and reproducibility of the DAVID SLS-2 scanner in three-dimensional facial imaging. Journal of Cranio-Maxillofacial Surgery, 45(10), 1662-1670. doi:10.1016/j.jcms.2017.07.006Luhmann, T. (2010). Close range photogrammetry for industrial applications. ISPRS Journal of Photogrammetry and Remote Sensing, 65(6), 558-569. doi:10.1016/j.isprsjprs.2010.06.003Hui, Z., Liyan, Z., Hongtao, W., & Jianfu, C. (2009). Surface Measurement Based on Instantaneous Random Illumination. Chinese Journal of Aeronautics, 22(3), 316-324. doi:10.1016/s1000-9361(08)60105-3McPherron, S. P., Gernat, T., & Hublin, J.-J. (2009). Structured light scanning for high-resolution documentation of in situ archaeological finds. Journal of Archaeological Science, 36(1), 19-24. doi:10.1016/j.jas.2008.06.028Arias, P., Herráez, J., Lorenzo, H., & Ordóñez, C. (2005). Control of structural problems in cultural heritage monuments using close-range photogrammetry and computer methods. Computers & Structures, 83(21-22), 1754-1766. doi:10.1016/j.compstruc.2005.02.018Patrucco, G., Rinaudo, F., & Spreafico, A. (2019). A NEW HANDHELD SCANNER FOR 3D SURVEY OF SMALL ARTIFACTS: THE STONEX F6. The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, XLII-2/W15, 895-901. doi:10.5194/isprs-archives-xlii-2-w15-895-2019Guidi, G., Atzeni, C., Seracini, M., & Lazzari, S. (2004). Painting Survey by 3D Optical Scanning - The Case ofAdoration of the Magiby Leonardo Da Vinci. Studies in Conservation, 49(1), 1-12. doi:10.1179/sic.2004.49.1.1Palma, G., Pingi, P., Siotto, E., Bellucci, R., Guidi, G., & Scopigno, R. (2019). Deformation analysis of Leonardo da Vinci’s «Adorazione dei Magi» through temporal unrelated 3D digitization. Journal of Cultural Heritage, 38, 174-185. doi:10.1016/j.culher.2018.11.001Batlle, J., Mouaddib, E., & Salvi, J. (1998). Recent progress in coded structured light as a technique to solve the correspondence problem. Pattern Recognition, 31(7), 963-982. doi:10.1016/s0031-3203(97)00074-5Salvi, J., Pagès, J., & Batlle, J. (2004). Pattern codification strategies in structured light systems. Pattern Recognition, 37(4), 827-849. doi:10.1016/j.patcog.2003.10.002DAVID SLS-1 FLYER http://kvejborg.dk/media/1245/flyer-web.pdfCloudCompare (Version 2.6) [GPL Software] http://www.cloudcompare.org/Besl, P. J., & McKay, N. D. (1992). A method for registration of 3-D shapes. IEEE Transactions on Pattern Analysis and Machine Intelligence, 14(2), 239-256. doi:10.1109/34.121791Gold, S., Rangarajan, A., Lu, C.-P., Pappu, S., & Mjolsness, E. (1998). New algorithms for 2D and 3D point matching. Pattern Recognition, 31(8), 1019-1031. doi:10.1016/s0031-3203(98)80010-1Bing Jian, & Vemuri, B. C. (2011). Robust Point Set Registration Using Gaussian Mixture Models. IEEE Transactions on Pattern Analysis and Machine Intelligence, 33(8), 1633-1645. doi:10.1109/tpami.2010.223Oomori, S., Nishida, T., & Kurogi, S. (2016). Point cloud matching using singular value decomposition. Artificial Life and Robotics, 21(2), 149-154. doi:10.1007/s10015-016-0265-xZhu, H., Guo, B., Zou, K., Li, Y., Yuen, K.-V., Mihaylova, L., & Leung, H. (2019). A Review of Point Set Registration: From Pairwise Registration to Groupwise Registration. Sensors, 19(5), 1191. doi:10.3390/s19051191Lin, C.-C., Tai, Y.-C., Lee, J.-J., & Chen, Y.-S. (2017). A novel point cloud registration using 2D image features. EURASIP Journal on Advances in Signal Processing, 2017(1). doi:10.1186/s13634-016-0435-yAbate, D. (2019). Documentation of paintings restoration through photogrammetry and change detection algorithms. Heritage Science, 7(1). doi:10.1186/s40494-019-0257-

Estudio de factibilidad para la creación de una consultora de desarrollo microempresarial, ubicada en el cantón Milagro.

El origen de este investigación, surge con la idea de aportar en el desarrollo económico del Cantón Milagro, ya que, si bien es una ciudad muy comercial, se nota a simple vista que la gran mayoría de negocios se maneja de manera empírica, por lo que, las decisiones que toman los propietarios de los negocios muchas veces no son las acertadas y esto conlleva a la quiebra o cierre definitivo del establecimiento. La presente investigación estará compuesta de 4 capítulos, más uno que es de propuesta a la solución de los problemas identificados. El en PRIMER CAPÍTULO, estudiara el origen del problema, sus principales causas y efectos, la delimitación del problema y se planteará la formulación junto al objetivo general y los específicos concluyendo con la justificación del tema investigativo. En el SEGUNDO CAPÍTULO, se rige al entorno del marco teórico, marco referencial, marco legal, aquí se plantearán las hipótesis tanto general como particulares y se dará a conocer las terminologías con mayor relevancias en el proyecto investigativo. En el TERCER CAPÍTULO, se indicara, la forma y metodología como se realizó la investigación, además, como se determinó y se seleccionó la muestra tomando en cuenta el tratamiento estadístico de la información. El CUARTO CAPÍTULO, se analizará una situación actual sobre la problemática que afecta al tema investigativo y a su vez se expondrá los resultados obtenidos a través de la herramienta como la encuesta, la cual se utiliza en la investigación para verificar las hipótesis. En el QUINTO CAPÍTULO, se planteará la propuesta de acuerdo a la solución al problema identificado, esta será muy consistente, ya que se la justificará y fundamentará en base a los resultaos obtenidos

Integrated Photogrammetric-Acoustic Technique for Qualitative Analysis of the Performance of Acoustic Screens in Sandy Soils

[EN] In this work, we present an integrated photogrammetric-acoustic technique that, together with the construction of a scaled wind tunnel, allows us to experimentally analyze the permeability behavior of a new type of acoustic screen based on a material called sonic crystal. Acoustic screens are devices used to reduce noise, mostly due to communication infrastructures, in its transmission phase from the source to the receiver. The main constructive difference between these new screens and the classic ones is that the first ones are formed by arrays of acoustic scatterers while the second ones are formed by continuous walls. This implies that, due to their geometry, screens based on sonic crystals are permeable to wind and water, unlike the classic ones. This fact may allow the use of these new screens in sandy soils, where sand would pass through the screen, avoiding the formation of sand dunes that are formed in classic screens and drastically reducing their acoustic performance. In this work, the movement of the sand and the resulting acoustic attenuation in these new screens are analyzed qualitatively, comparing the results with those obtained with the classic ones, and obtaining interesting results from the acoustic point of view.Bravo, JM.; Buchón Moragues, FF.; Redondo, J.; Ferri García, M.; Sánchez Pérez, JV. (2019). Integrated Photogrammetric-Acoustic Technique for Qualitative Analysis of the Performance of Acoustic Screens in Sandy Soils. Sensors. 19(22):1-17. https://doi.org/10.3390/s19224881S1171922Castiñeira-Ibañez, S., Rubio, C., & Sánchez-Pérez, J. V. (2015). Environmental noise control during its transmission phase to protect buildings. Design model for acoustic barriers based on arrays of isolated scatterers. Building and Environment, 93, 179-185. doi:10.1016/j.buildenv.2015.07.002Fredianelli, L., Del Pizzo, A., & Licitra, G. (2019). Recent Developments in Sonic Crystals as Barriers for Road Traffic Noise Mitigation. Environments, 6(2), 14. doi:10.3390/environments6020014Martínez-Sala, R., Sancho, J., Sánchez, J. V., Gómez, V., Llinares, J., & Meseguer, F. (1995). Sound attenuation by sculpture. Nature, 378(6554), 241-241. doi:10.1038/378241a0Morandi, F., Miniaci, M., Marzani, A., Barbaresi, L., & Garai, M. (2016). Standardised acoustic characterisation of sonic crystals noise barriers: Sound insulation and reflection properties. Applied Acoustics, 114, 294-306. doi:10.1016/j.apacoust.2016.07.028Castiñeira-Ibáñez, S., Rubio, C., Romero-García, V., Sánchez-Pérez, J. V., & García-Raffi, L. M. (2012). Design, Manufacture and Characterization of an Acoustic Barrier Made of Multi-Phenomena Cylindrical Scatterers Arranged in a Fractal-Based Geometry. Archives of Acoustics, 37(4), 455-462. doi:10.2478/v10168-012-0057-9Sanchez-Perez, J. V., Castineira-Ibanez, S., Romero-Garcia, V., & Garcia-Raffi, L. M. (2015). PERIODIC SYSTEMS AS ROAD TRAFFIC NOISE REDUCING DEVICES: PROTOTYPE AND STANDARDIZATION. Environmental Engineering and Management Journal, 14(12), 2759-2769. doi:10.30638/eemj.2015.293Wang, Y.-F., Wang, Y.-S., & Laude, V. (2015). Wave propagation in two-dimensional viscoelastic metamaterials. Physical Review B, 92(10). doi:10.1103/physrevb.92.104110Wang, Y.-F., Liang, J.-W., Chen, A.-L., Wang, Y.-S., & Laude, V. (2019). Wave propagation in one-dimensional fluid-saturated porous metamaterials. Physical Review B, 99(13). doi:10.1103/physrevb.99.134304Valkenburg, R. J., & McIvor, A. M. (1998). Accurate 3D measurement using a structured light system. Image and Vision Computing, 16(2), 99-110. doi:10.1016/s0262-8856(97)00053-xHui, Z., Liyan, Z., Hongtao, W., & Jianfu, C. (2009). Surface Measurement Based on Instantaneous Random Illumination. Chinese Journal of Aeronautics, 22(3), 316-324. doi:10.1016/s1000-9361(08)60105-3McPherron, S. P., Gernat, T., & Hublin, J.-J. (2009). Structured light scanning for high-resolution documentation of in situ archaeological finds. Journal of Archaeological Science, 36(1), 19-24. doi:10.1016/j.jas.2008.06.028Bruno, F., Bianco, G., Muzzupappa, M., Barone, S., & Razionale, A. V. (2011). Experimentation of structured light and stereo vision for underwater 3D reconstruction. ISPRS Journal of Photogrammetry and Remote Sensing, 66(4), 508-518. doi:10.1016/j.isprsjprs.2011.02.009Bertani, D. (1995). High-resolution optical topography applied to ancient painting diagnostics. Optical Engineering, 34(4), 1219. doi:10.1117/12.196545Buchón-Moragues, F., Bravo, J., Ferri, M., Redondo, J., & Sánchez-Pérez, J. (2016). Application of Structured Light System Technique for Authentication of Wooden Panel Paintings. Sensors, 16(6), 881. doi:10.3390/s16060881Arias, P., Herráez, J., Lorenzo, H., & Ordóñez, C. (2005). Control of structural problems in cultural heritage monuments using close-range photogrammetry and computer methods. Computers & Structures, 83(21-22), 1754-1766. doi:10.1016/j.compstruc.2005.02.018Rocchini, C., Cignoni, P., Montani, C., Pingi, P., & Scopigno, R. (2001). A low cost 3D scanner based on structured light. Computer Graphics Forum, 20(3), 299-308. doi:10.1111/1467-8659.00522Bianchi, M. G., Casula, G., Cuccuru, F., Fais, S., Ligas, P., & Ferrara, C. (2018). Three-dimensional imaging from laser scanner, photogrammetric and acoustic non-destructive techniques in the characterization of stone building materials. Advances in Geosciences, 45, 57-62. doi:10.5194/adgeo-45-57-2018Alvarez, L., Moreno, H., Segales, A., Pham, T., Pillar-Little, E., & Chilson, P. (2018). Merging Unmanned Aerial Systems (UAS) Imagery and Echo Soundings with an Adaptive Sampling Technique for Bathymetric Surveys. Remote Sensing, 10(9), 1362. doi:10.3390/rs10091362Miller, B. S., Wotherspoon, S., Rankin, S., Calderan, S., Leaper, R., & Keating, J. L. (2018). Estimating drift of directional sonobuoys from acoustic bearings. The Journal of the Acoustical Society of America, 143(1), EL25-EL30. doi:10.1121/1.5020621Zhang, D., Li, S., Bai, X., Yang, Y., & Chu, Y. (2019). Experimental Study on Mechanical Properties, Energy Dissipation Characteristics and Acoustic Emission Parameters of Compression Failure of Sandstone Specimens Containing En Echelon Flaws. Applied Sciences, 9(3), 596. doi:10.3390/app9030596Hartley, R. I., & Schaffalitzky, F. (2009). Reconstruction from Projections Using Grassmann Tensors. International Journal of Computer Vision, 83(3), 274-293. doi:10.1007/s11263-009-0225-1Ahmadabadian, A. H., Robson, S., Boehm, J., Shortis, M., Wenzel, K., & Fritsch, D. (2013). A comparison of dense matching algorithms for scaled surface reconstruction using stereo camera rigs. ISPRS Journal of Photogrammetry and Remote Sensing, 78, 157-167. doi:10.1016/j.isprsjprs.2013.01.015Olague, G., & Dunn, E. (2007). Development of a practical photogrammetric network design using evolutionary computing. The Photogrammetric Record, 22(117), 22-38. doi:10.1111/j.1477-9730.2007.00403.xHirschmuller, H. (2008). Stereo Processing by Semiglobal Matching and Mutual Information. IEEE Transactions on Pattern Analysis and Machine Intelligence, 30(2), 328-341. doi:10.1109/tpami.2007.1166Chen, Y., & Wang, L. (2014). Periodic co-continuous acoustic metamaterials with overlapping locally resonant and Bragg band gaps. Applied Physics Letters, 105(19), 191907. doi:10.1063/1.4902129Kaina, N., Causier, A., Bourlier, Y., Fink, M., Berthelot, T., & Lerosey, G. (2017). Slow waves in locally resonant metamaterials line defect waveguides. Scientific Reports, 7(1). doi:10.1038/s41598-017-15403-8Cummer, S. A., Christensen, J., & Alù, A. (2016). Controlling sound with acoustic metamaterials. Nature Reviews Materials, 1(3). doi:10.1038/natrevmats.2016.1Sigalas, M. M., & Economou, E. N. (1992). Elastic and acoustic wave band structure. Journal of Sound and Vibration, 158(2), 377-382. doi:10.1016/0022-460x(92)90059-7Sánchez-Pérez, J. V., Caballero, D., Mártinez-Sala, R., Rubio, C., Sánchez-Dehesa, J., Meseguer, F., … Gálvez, F. (1998). Sound Attenuation by a Two-Dimensional Array of Rigid Cylinders. Physical Review Letters, 80(24), 5325-5328. doi:10.1103/physrevlett.80.5325Sanchez-Perez, J. V., Rubio, C., Martinez-Sala, R., Sanchez-Grandia, R., & Gomez, V. (2002). Acoustic barriers based on periodic arrays of scatterers. Applied Physics Letters, 81(27), 5240-5242. doi:10.1063/1.153311

Digital light processing-3D printing of thermoset materials with high biodegradability from amino acid-derived acrylamide monomers

Six acrylamide resins, derived from l-phenylalanine and l-leucine, are designed for application in digital light processing (DLP) printers to obtain biodegradable thermoset polymers. The acrylamide copolymers are prepared under light irradiation at 405 nm and thermal post-curing processes. Low molecular weight poly(ethylene glycol)diacrylate (PEGDA) and N,N-dimethylacrylamide (DMAM), both liquid resins, are used as co-monomers and diluents for the amino acid-derived acrylamide solubilization. The presence of two phenylalanine units and two ester groups in the acrylamide monomer accuses a fast degradation rate in hydrolytic medium in 90 days. The residual products leached in the aqueous media prove to be non-cytotoxic, when 3D-printed samples are cultured with osteoblast cells (MG63), which represents an advantage for the safe disposal of printer waste materials. The scaled-up pieces derived from l-phenylalanine and diethylene glycol, as amino acid-derived acrylamide (named compound C), PEGDA and DMAM, present high dimensional stability after DLP printing of complex structures used as testing samples. Layers of 50 µm of thickness are well cohesive having isotropic behavior, as demonstrated with tensile-strain measurements performed in X–Y–Z (plane) directions. The compound C, which contains phenylalanine amino acid, reveals a promising potential to replace non-biodegradable acrylate polymers used in prototyping systems.Postprint (author's final draft

A mathematical model of the transmission dynamics of tuberculosis with exogenous reinfection in the infection-free state

In the present work, a perturbation of the model presented by Feng, Castillo-Chávez and Capurro (2000) will be carried out, where the dynamics of tuberculosis transmission will be described, where recovery from the disease will be incorporated. The model will include four epidemiological populations: Susceptible (S), Exposed (E), Infected (I) and Infected with treatment (T). This will allow to know how the interaction that exists with the infected can cause the permanence of the individuals with the disease. For which, its qualitative behavior will be analyzed as its evolution in time of the epidemiological populations for the model by the ordinary differential equations (ODE) and its perturbation to the dalay differential equations (DDE). In this way, it will allow us to know how the parameters influence the spread of the disease at the point free of infection and with a computational extension to evaluate an endemic situation.Campus Lima Nort

The variable geometry central receiver system concept. First results and comparison with conventional central receiver systems

In line with the global trend for improving efficiency of existing solar power plants, the CTAER has developed and built a variable geometry central receiver facility, in which the solar field rotates around the tower axis following the sun's position during the day. The goal of this new approach is to increase the optical efficiency of the field by significantly reducing the angle of incidence of the Sun on the heliostats. This paper presents the advantages of this new variable geometry design and describes the main features of the experimental facility based on this approach as built by CTAER in Almeria. It also compares a conventional solar central receiver plant (i.e., with stationary heliostats and receiver) and an equivalent variable geometry power plant. For this study we employed published data from a real solar central receiver plant with known production (Abengoa’s PS10). The results of the study show an increase in annual energy collection and distribution by the variable geometry plant, leading to a potential reduction in the number of heliostats required compared to a conventional central receiver plant for the same annual energy collection

Tratamientos para la sialorrea en personas con Parálisis Cerebral: Una revisión

Objective: Discuss the benefits of treatment options for people with cerebral palsy (CP). Material and methods: The PubMed, Scielo, Cochrane Library, and LILACS databases were searched using the terms: 1. '' Sialorrhea treatment '' AND '' cerebral palsy '', 2. '' drooling treatment '' AND '' cerebral palsy ''. Inclusion criteria: Relevance to the topic, samples with at least ten people with CP, maximum 5 years of publication, English or Spanish language, full-text availability. Exclusion criteria: case reports, bibliographic reviews. Results:  A total of 93 articles were found, of which 36 were duplicates. Three authors read the abstract of the remaining 57 and, after applying the eligibility criteria, selected 25 (n = 848) for full-text reading. Of these: 7 studies showed results with botulinum toxin (botox), 5 with surgical interventions, 2 used functional chewing training, 1 study of muscle vibration, 1 of anticholinergic use, 1 of atropine, and 8 studies compared two or more treatments options. Only 3 studies had a sample with more than 100 individuals. Conclusion: The evidence is not conclusive to determine whether one treatment is more effective than another. However, making greater efforts to improve and adapt dental care in people with CP will allow less invasive and equally effective hypersalivation treatments.Objetivo: Analizar beneficios de opiones de para las personas con parálisis cerebral (PC).Material y métodos: A fecha de 04/09, se buscó en las bases de datos PubMed, Scielo, Cochrane Library y LILACS usando los términos: 1.''sialorrhea treatment'' AND ''cerebral palsy'', 2. ''drooling treatment'' AND ''cerebral palsy''. Criterios de inclusión: Pertinencia con el tema, muestras con al menos diez personas con PC, máximo 5 años de publicación, idioma inglés o español, disponibilidad de texto completo. Criterios de exclusión: reportes de caso, revisiones bibliográficas. Resultados: Se encontró un total de 93 artículos, de los cuáles 36 estaban repetidos. Tres autores leyeron el resumen de los 57 restantes y, aplicados los criterios de elegibilidad, escogieron 25 (n= 848) para su lectura de texto completo y uso en esta revisión. De ellos: 7 estudios mostraron resultados con intervenciones con toxina botulínica (botox), 5 con intervenciones quirúrgicas, 2 utilizaron entrenamiento masticatorio funcional, 1 estudio de vibración muscular, 1 de uso de anticolinérgicos, 1 de atropina, y 8 estudios compararon dos o más tratamientos. Solo 3 estudios tuvieron una muestra con más de cien individuos. Conclusión: La evidencia no es concluyente para determinar que un tratamiento es más efectivo que otro. No obstante, hacer mayores esfuerzos en la correcta adaptación a la atención en personas con PC va a permitir tratamientos menos invasivos e igualmente efectivos para la sialorrea.

Application of structured light system technique for authentication of wooden panel paintings

[EN] This paper presents a new application of photogrammetric techniques for protecting cultural heritage. The accuracy of the method and the fact that it can be used to carry out different tests without contact between the sample and the instruments can make this technique very useful for authenticating and cataloging artworks. The application focuses on the field of pictorial artworks, and wooden panel paintings in particular. In these works, the orography formed by the brushstrokes can be easily digitalized using a photogrammetric technique, called Structured Light System, with submillimeter accuracy. Thus, some of the physical characteristics of the brushstrokes, like minimum and maximum heights or slopes become a fingerprint of the painting. We explain in detail the general principles of the Structured Light System Technique and the specific characteristics of the commercial set-up used in this work. Some experiments are carried out on a sample painted by us to check the accuracy limits of the technique and to propose some tests that can help to stablish a methodology for authentication purposes. Finally, some preliminary results obtained on a real pictorial artwork are presented, providing geometrical information of its metric features as an example of the possibilities of this applicationThis work was financially supported by Generalitat Valenciana through Contract No. AICO/2015/005.Buchón Moragues, FF.; Bravo, JM.; Ferri García, M.; Redondo, J.; Sánchez Pérez, JV. (2016). Application of structured light system technique for authentication of wooden panel paintings. Sensors. 16(881):1-10. https://doi.org/10.3390/s16060881S1101688

Realidad simulada como herramienta de enseñanza-aprendizaje en Criminología

El diseño de prácticas docentes de realidad simulada constituye un avance en el proceso de enseñanza-aprendizaje en el alumnado de Criminología. Mediante este tipo de actividades, los estudiantes desarrollan las competencias académicas y profesionales adquiridas durante su formación, recreando contextos y situaciones reales en un entorno de aprendizaje. El objetivo de este trabajo es evaluar las competencias adquiridas por el alumnado de último curso del Grado en Criminología, tras la implementación de una práctica de realidad simulada basada en la recreación de un Juicio donde el alumnado deberá poner en práctica los conocimientos y técnicas de evaluación criminológica aplicados al ámbito de la Justicia Penal. Se describen los resultados de aprendizaje y la satisfacción del alumnado con la incorporación de esta experiencia piloto mediante el análisis de respuestas de un cuestionario informatizado ad hoc

Enriquecimiento ambiental y bienestar en peces

Revisamos la relación entre el enriquecimiento ambiental y el bienestar de los peces, incluido el enriquecimiento ocupacional. Explicamos los diferentes aspectos a tener en cuenta y concluimos que el enriquecimiento ocupacional no parece tener efectos negativos sobre el crecimiento y que puede ayudar a sobrellevar los efectos de un estresor agudo.We review the relationship between environmental enrichment and fish welfare, including occupational enrichment. We explain the different aspects that should be taken into account and conclude that occupational enrichment does not appear to have negative effects on growth and that it can help to cope with acute stressors