Nueva fórmula para el cálculo del asiento de zapatas sobre arenas basado en el método de elementos finitos

En el diseño de las cimentaciones superficiales normalmente utilizadas en las construcciones rurales sobre arena, el criterio de asientos es más crítico que el de capacidad de carga del suelo. Igualmente se ha encontrado que los métodos más utilizados para estimar el asiento de zapatas sobre arenas generan diferencias con los observados en ensayos de campo a escala real. El objetivo de este estudio fue encontrar una nueva ecuación, basada en el método de elementos finitos (MEF) fácil de aplicar, para estimar el asiento de zapatas sobre arena. Esta nueva ecuación considera el efecto de la profundidad de cimentación, la anchura de la zapata, la rigidez equivalente del suelo, el coeficiente de Poisson y el incremento neto de la presión efectiva sobre los valores del asiento. Para obtener esta ecuación, se generó un modelo tridimensional de elementos finitos y se validó posteriormente utilizando los asientos reales de zapatas medidos durante ensayos de campo. Los resultados de las predicciones del asiento extraídos de esta formulación son ligeramente mejores que los obtenidos por otros métodos, pero esta formulación tiene la ventaja de ser más fácil y rápida de aplicar, lo que implica un ahorro en el tiempo de cálculo.In the design of shallow foundations normally used in rural buildings on sand, the settlement criterion is more critical than the bearing capacity of the soil. Likewise, it has also been found that widely used methods to estimate the footings settlement on sand, generates differences with the observed in full scale field tests. The aim of this study was to find a new equation based on finite element method (FEM) easy to apply to estimate the footings settlement on sand. This new equation considers the effect of the depth of the founding level, the footing breadth, the equivalent soil stiffness, the Poisson’s ratio and the net increase in the effective stress on settlement values. To obtain this equation, a three-dimensional finite element model was generated and subsequently validated using actual footings settlement measured during field tests. The results of settlement predictions extracted from this method are slightly better than those obtained by other methods, but this equation has the advantage of being easier and faster to apply, which implies a savings in computation time

Hazes and clouds in a singular triple vortex in Saturn's atmosphere from HST/WFC3 multispectral imaging

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Multilayer hazes over Saturn’s hexagon from Cassini ISS limb images

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Modeling and Analysis of the Performance of Exascale Photonic Networks

"This is the peer reviewed version of the following article: Duro, José, Jose A. Pascual, Salvador Petit, Julio Sahuquillo, and María E. Gómez. 2018. Modeling and Analysis of the Performance of Exascale Photonic Networks. Concurrency and Computation: Practice and Experience 31 (21). Wiley. doi:10.1002/cpe.4773, which has been published in final form at https://doi.org/10.1002/cpe.4773. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving."[EN] Photonics technology has become a promising and viable alternative for both on-chip and off-chip interconnection networks of future Exascale systems. Nevertheless, this technology is not mature enough yet in this context, so research efforts focusing on photonic networks are still required to achieve realistic suitable network implementations. In this regard, system-level photonic network simulators can help guide designers to assess the multiple design choices. Most current research is done on electrical network simulators, whose components work widely different from photonics components. In this work, we summarize and compare the working behavior of both technologies which includes the use of optical routers, wavelength-division multiplexing and circuit switching among others. After implementing them into a well-known simulation framework, an extensive simulation study has been carried out using realistic photonic network configurations with synthetic and realistic traffic. Experimental results show that, compared to electrical networks, optical networks can reduce the execution time of the studied real workloads in almost one order of magnitude. Our study also reveals that the photonic configuration highly impacts on the network performance, being the bandwidth per channel and the message length the most important parameters.This work was supported by the ExaNeSt project, funded by the European Union's Horizon 2020 Research and Innovation Program under grant 671553, and by the Spanish Ministerio de Economía y Competitividad (MINECO) and Plan E funds under grant TIN2015-66972-C5-1-R. Pascual was supported by a HiPEAC Collaboration Grant.Duro-Gómez, J.; Pascual Pérez, JA.; Petit Martí, SV.; Sahuquillo Borrás, J.; Gómez Requena, ME. (2019). Modeling and Analysis of the Performance of Exascale Photonic Networks. Concurrency and Computation Practice and Experience. 31(21):1-12. https://doi.org/10.1002/cpe.4773S1123121Top500 website. Accessed January2018.Kodi, A. K., Neel, B., & Brantley, W. C. (2014). Photonic Interconnects for Exascale and Datacenter Architectures. IEEE Micro, 34(5), 18-30. doi:10.1109/mm.2014.62Rumley, S., Nikolova, D., Hendry, R., Li, Q., Calhoun, D., & Bergman, K. (2015). Silicon Photonics for Exascale Systems. Journal of Lightwave Technology, 33(3), 547-562. doi:10.1109/jlt.2014.2363947Shacham, A., Bergman, K., & Carloni, L. P. (2008). Photonic Networks-on-Chip for Future Generations of Chip Multiprocessors. IEEE Transactions on Computers, 57(9), 1246-1260. doi:10.1109/tc.2008.78Batten, C., Joshi, A., Orcutt, J., Khilo, A., Moss, B., Holzwarth, C. W., … Asanovic, K. (2009). Building Many-Core Processor-to-DRAM Networks with Monolithic CMOS Silicon Photonics. IEEE Micro, 29(4), 8-21. doi:10.1109/mm.2009.60WernerS NavaridasJ LujánM.Designing low‐power low‐latency networks‐on‐chip by optimally combining electrical and optical links. Paper presented at: 23rd IEEE International Symposium on High Performance Computer Architecture (HPCA);2016;Austin TX.PucheJ LechagoS PetitS GómezME SahuquilloJ.Accurately modeling a photonic NoC in a detailed CMP simulation framework. Paper presented at: 2016 International Conference on High Performance Computing & Simulation (HPCS);2016;Innsbruck Austria.ChenG ChenH HaurylauM et al.On‐chip copper‐based vs. optical interconnects: delay uncertainty latency power and bandwidth density comparative predictions. Paper presented at: 2006 International Interconnect Technology Conference;2006;Burlingame CA.KatevenisM ChrysosN MarazakisM et al.The ExaNeSt project: Interconnects storage and packaging for exascale systems. Paper presented at: 2016 Euromicro Conference on Digital System Design (DSD);2016;Limassol Cyprus.ConcattoC PascualJA NavaridasJ et al.A CAM-Free Exascalable HPC Router for Low-Energy Communications. Paper presented at: 31st International Conference on Architecture of Computing Systems (ARCS);2018.DuanG‐H FedeliJ‐M KeyvaniniaS ThomsonD et al.10 Gb/s integrated tunable hybrid III‐V/si laser and silicon Mach‐Zehnder modulator. Paper presented at: European Conference and Exhibition on Optical Communications;2012;Amsterdam The Netherlands.DuanGH JanyC Le LiepvreAL et al.Integrated hybrid III‐V/si laser and transmitter. Paper presented at: 2012 International Conference on Indium Phosphide and Related Materials;2012;Santa Barbara CA.Soref, R., & Bennett, B. (1987). Electrooptical effects in silicon. IEEE Journal of Quantum Electronics, 23(1), 123-129. doi:10.1109/jqe.1987.1073206Liu, A., Liao, L., Rubin, D., Nguyen, H., Ciftcioglu, B., Chetrit, Y., … Paniccia, M. (2007). High-speed optical modulation based on carrier depletion in a silicon waveguide. Optics Express, 15(2), 660. doi:10.1364/oe.15.000660Thomson, D. J., Gardes, F. Y., Hu, Y., Mashanovich, G., Fournier, M., Grosse, P., … Reed, G. T. (2011). High contrast 40Gbit/s optical modulation in silicon. Optics Express, 19(12), 11507. doi:10.1364/oe.19.011507Bergman, K., Carloni, L. P., Biberman, A., Chan, J., & Hendry, G. (2014). Photonic Network-on-Chip Design. Integrated Circuits and Systems. doi:10.1007/978-1-4419-9335-9Dong, P., Chen, L., Xie, C., Buhl, L. L., & Chen, Y.-K. (2012). 50-Gb/s silicon quadrature phase-shift keying modulator. Optics Express, 20(19), 21181. doi:10.1364/oe.20.021181DongP LiuX SethumadhavanC et al.224‐Gb/s PDM‐16‐QAM modulator and receiver based on silicon photonic integrated circuits. Paper presented at: Optical Fiber Communication Conference/National Fiber Optic Engineers Conference;2013;Anaheim CA.Navaridas, J., Miguel-Alonso, J., Pascual, J. A., & Ridruejo, F. J. (2011). Simulating and evaluating interconnection networks with INSEE. Simulation Modelling Practice and Theory, 19(1), 494-515. doi:10.1016/j.simpat.2010.08.008Lu, L., Zhao, S., Zhou, L., Li, D., Li, Z., Wang, M., … Chen, J. (2016). 16 × 16 non-blocking silicon optical switch based on electro-optic Mach-Zehnder interferometers. Optics Express, 24(9), 9295. doi:10.1364/oe.24.009295DuroJ PetitS SahuquilloJ GómezME.Modeling a photonic network for exascale computing. Paper presented at: 2017 International Conference on High Performance Computing & Simulation (HPCS);2017;Genoa Italy.Xi, K., Kao, Y.-H., & Chao, H. J. (2012). A Petabit Bufferless Optical Switch for Data Center Networks. Optical Interconnects for Future Data Center Networks, 135-154. doi:10.1007/978-1-4614-4630-9_8KimJ DallyWJ ScottS AbtsD.Technology‐driven highly‐scalable dragonfly topology. Paper presented at: 35th International Symposium on Computer Architecture (ISCA);2008;Beijing China.Essiambre, R.-J., & Tkach, R. W. (2012). Capacity Trends and Limits of Optical Communication Networks. Proceedings of the IEEE, 100(5), 1035-1055. doi:10.1109/jproc.2012.2182970Temprana, E., Myslivets, E., Kuo, B. P.-P., Liu, L., Ataie, V., Alic, N., & Radic, S. (2015). Overcoming Kerr-induced capacity limit in optical fiber transmission. Science, 348(6242), 1445-1448. doi:10.1126/science.aab1781Springel, V. (2005). The cosmological simulation code gadget-2. Monthly Notices of the Royal Astronomical Society, 364(4), 1105-1134. doi:10.1111/j.1365-2966.2005.09655.xPlimpton, S. (1995). Fast Parallel Algorithms for Short-Range Molecular Dynamics. Journal of Computational Physics, 117(1), 1-19. doi:10.1006/jcph.1995.1039Ben‐ItzhakY ZahaviE CidonI KolodnyA.HNOCS: Modular open‐source simulator for heterogeneous NoCs. Paper presented at: 2012 International Conference on Embedded Computer Systems (SAMOS);2012;Samos Greece.HossainH AhmedM Al‐NayeemA IslamTZ AkbarMM.Gpnocsim‐a general purpose simulator for network‐on‐chip. Paper presented at: 2007 International Conference on Information and Communication Technology;2007;Dhaka Bangladesh.JainL Al‐HashimiB GaurMS LaxmiV NarayananA.NIRGAM: A simulator for NoC interconnect routing and application modeling. Paper presented at: Design Automation and Test in Europe Conference;2007;Nice France.ChanJ HendryG BibermanA BergmanK CarloniLP.PhoenixSim: A simulator for physical‐layer analysis of chip‐scale photonic interconnection networks. In: Proceedings of the Conference on Design Automation and Test in Europe;2010;Dresden Germany.RumleyS BahadoriM WenK NikolovaD BergmanK.PhoenixSim: crosslayer design and modeling of silicon photonic interconnects. In: Proceedings of the 1st International Workshop on Advanced Interconnect Solutions and Technologies for Emerging Computing Systems;2016;Prague Czech Republic.VargaA HornigR.An overview of the OMNeT++ simulation environment. In: Proceedings of the 1st International Conference on Simulation Tools and Techniques for Communications Networks and Systems & Workshops;2008;Marseille France.SunC ChenCHO KurianG et al.DSENT‐a tool connecting emerging photonics with electronics for opto‐electronic networks‐on‐chip modeling. Paper presented at: 2012 IEEE/ACM Sixth International Symposium on Networks‐on‐Chip;2012;Copenhagen Denmark.Ma, X., Yu, J., Hua, X., Wei, C., Huang, Y., Yang, L., … Yang, J. (2014). LioeSim: A Network Simulator for Hybrid Opto-Electronic Networks-on-Chip Analysis. Journal of Lightwave Technology, 32(22), 4301-4310. doi:10.1109/jlt.2014.2356515KahngAB LiB PehL‐S SamadiK.ORION 2.0: a fast and accurate NoC power and area model for early‐stage design space exploration. In: Proceedings of the Conference on Design Automation and Test in Europe;2009;Nice France.Chan, J., Hendry, G., Bergman, K., & Carloni, L. P. (2011). Physical-Layer Modeling and System-Level Design of Chip-Scale Photonic Interconnection Networks. IEEE Transactions on Computer-Aided Design of Integrated Circuits and Systems, 30(10), 1507-1520. doi:10.1109/tcad.2011.215715

Nuestra experiencia en el tratamiento de la escoliosis idiopática mediante la electroestimulación percutánea

Se presentan los resultados obtenidos en 40 pacientes con escoliosis tratadas mediante estimulador externo (Spinelectron) de corriente continua y doble canal. Se valor a el equilibrio vertebral, el valor angular de las curvas y su rotación. Los pacientes se dividieron en 2 grupos, según el valor angula r de las curvas. El primero con grados Cobb entre 20° y 29° y el segundo entre 30° y 39°. Igualmente se analizaron los resultados según el tipo de curva . La tas a de progresión par a curvas torácicas fue del 65.3%, mientras que par a curvas toracolumbares y lumbares fue del 50%. En cuanto al valor angular de las curvas observamos que el 55% de las curvas entre 20-29° aumentaron su valor angular, pasando de 24.7° a 31.5°. En cuanto a las curvas entre 30-39° el 50% de los casos necesitó artrodesis posterior. Los resultados de la electroestimulación no difieren de la evolución natural de la escoliosis por lo que el tratamiento puede considerarse ineficaz.Lateral electrical Surface Stimulation using the Spinelectron ® device was applied to 40 patients for treatment of idiopathic scoliosis.The authors value vertebra l balance , curve measurement (Cobb method ) and rotational devia tion . The patients were distributed in two groups according to the angular value of the curves; the first group between 20° an d 29° o f Cobb angle an d 30° t o 39° the second one . The results were analyzed depending on the curve pattern . The average of progression at the thoracic curve s was 65,3 %, an d a t th e thoraco - lumba r an d lumba r curve s wer e 5 0 %. In th e first group , th e 5 5 % o f th e curve s showed an increase of the Cobb angle , 24,7° at the begining of the treatment to 31,5° at the en d (averag e values). In the second group the 5 0 % o f the patients needed surgery . The results of the Electrical Stimulation do not modify the natural evolution of the scoliosis, so , the treatment can consider it ineffective

El corsé de Milwaukee en la escoliosis idiopática: resultados en el plano sagital

Se presentan los resultados obtenidos en el tratamiento de la escoliosis idiopática con el cors é de Milwauke e en el plano sagital. Han sido estudiado s 51 paciente s (44 mujere s y 7 varones) con una edad medi a al inicio del tratamient o de 13 años. El tipo de curva según la clasificación de King y Moe corresponde a 18 del tipo I, 16 del tipo II, 12 del III, 1 del IV, 2 del V y dos curvas lumbares. El seguimiento medio de la serie fue de 5 años. El 88% de los pacientes (45 casos) mostró una disminución del valor angular medio de la cifosis torácica. El promedio de disminución fue de 10° que representa el 32% del valor angular inicial. El 86% (44 pacientes) mostró aplanamiento de la lordosis lumbar , pasando de un valor inicial medi o de 59°, a un valor final del tratamiento de 49°. Esta disminución representa un 16% del valor inicial. La edad, el tipo y la elasticidad de la curva, así como el Risser no mostraron relación con la evolución de las curvas en el plano sagital.The results obtained in the sagittal plane in patients with idiopathic scoliosis treated by Milwauke e brace are presented. A series of 51 patients (44 females, 7 males) with average of 13 years, wer e included in the study. Using the King and More's classification, 18 patients had type I curves,16 type II, 12 type III, 1 type IV and 2 patients showed tipe V curves. Two had lumbar curves. The mean follow-up was 5 years. In 45 patients (88%) the thoracic Kyphosis showed a decrease of 10° in average angular value (32% of initial value). 44 patients (86%) showed loss of lumbar lordosis, passing from an initial average value of 59° to 49° of final average value (16%). Age, type of the curve, Risser and bending test wer e not related with the evolution of curvatures in the sagittal plane

Translational Applications of Artificial Intelligence and Machine Learning for Diagnostic Pathology in Lymphoid Neoplasms: A Comprehensive and Evolutive Analysis

Genomic analysis and digitalization of medical records have led to a big data scenario within hematopathology. Artificial intelligence and machine learning tools are increasingly used to integrate clinical, histopathological, and genomic data in lymphoid neoplasms. In this study, we identified global trends, cognitive, and social framework of this field from 1990 to 2020. Metadata were obtained from the Clarivate Analytics Web of Science database in January 2021. A total of 525 documents were assessed by document type, research areas, source titles, organizations, and countries. SciMAT and VOSviewer package were used to perform scientific mapping analysis. Geographical distribution showed the USA and People’s Republic of China as the most productive countries, reporting up to 190 (36.19%) of all documents. A third-degree polynomic equation predicts that future global production in this area will be three-fold the current number, near 2031. Thematically, current research is focused on the integration of digital image analysis and genomic sequencing in Non-Hodgkin lymphomas, prediction of chemotherapy response and validation of new prognostic models. These findings can serve pathology departments to depict future clinical and research avenues, but also, public institutions and administrations to promote synergies and optimize funding allocation.Andalusia Health System - RH-0145-2020EU FEDER ITI Grant for Cadiz Province PI-0032-201

¿Implicar a los estudiantes en la modificación de rúbricas influye sobre su percepción de validez?

[EN] Oral presentation is one of the fundamental competences in the teaching-learning process for most of the university students and rubrics could be used as a useful tool in this process. Therefore, the main objective was to determine the perception of validity and utility of a rubric for students of the Physical Education and Sports Sciences degree, considering also if they were involved or not in the rubric’s development. 115 students participated, in two groups. The teacher of the subject gave to both groups the same rubric to evaluate their oral presentations. So, one of the groups modified and prepared the rubric´s elements. After oral presentations, both groups completed a rubric's validity perception questionnaire. Moreover, the academic performance of the two groups was recorded. Students positively assessed the rubric´s validity as a method of preparing and evaluating the oral presentation. The results non-show to the possible effect on this perception in the students that could be involved in the modification and preparation of the rubric. However, academic performance could have a greater influence.[ES] Una de las competencias transversales fundamentales en el ámbito universitario es la exposición oral. Las rúbricas pueden ser una herramienta especialmente útil para promover su desarrollo y alinear los procesos enseñanza-aprendizaje y la evaluación de la misma. El objetivo principal del estudio ha consistido en determinar la validez y utilidad que los estudiantes de la titulación de Ciencias de la Actividad Física y el Deporte conceden a una rúbrica desarrollada al efecto, considerando adicionalmente su implicación o no en la elaboración de la misma. En el estudio participaron un total de 115 estudiantes divididos en dos grupos. El profesor de la asignatura facilitó la misma rúbrica a ambos grupos para guiar el desarrollo y evaluar sus posteriores exposiciones orales, aunque solo un grupo pudo participar en la elaboración y modificación de los elementos que componen la rúbrica. Una vez realizadas las exposiciones orales, ambos grupos respondieron a un cuestionario de percepción de validez de la rúbrica. Además, se tuvo constancia del rendimiento académico de los dos grupos. Ambos grupos valoraron positivamente la validez y utilidad de la rúbrica como método de preparación y evaluación de la exposición oral. Sin embargo, los resultados no muestran efectos significativos de la implicación o no en la modificación y elaboración de la rúbrica sobre la misma, a diferencia del rendimiento académico que sí que pudo tener una mayor influencia.Priego Quesada, J.; Requena-Bueno, L.; Jiménez-Pérez, I.; García-Ros, R. (2019). ¿Implicar a los estudiantes en la modificación de rúbricas influye sobre su percepción de validez?. En IN-RED 2019. V Congreso de Innovación Educativa y Docencia en Red. Editorial Universitat Politècnica de València. 329-342. https://doi.org/10.4995/INRED2019.2019.1041632934