Modeling and Control of the Ball and Beam Process

One of the most difficult problems that an engineer who works with modeling deals with, is the question about how to translate a physical phenomenon into a set of equations. It is usually difficult to capture all dynamics and phenomena, so one usually strives for a set of equations that describes the physical system approximately and adequately with the accuracy for the purpose. In our case, we model the dynamics relevant for control design. The topic of this thesis was to do an in-depth study of the Ball and Beam process. Two different experimental implementation of the Ball and Beam process have been considered, both available at the course lab at the Department of Automatic Control, Lund. The first step consisted of deriving the equations of motion, that is, to do the mathematical modeling of the process. In order to implement this model Modelica has been used. Modelica, which is a powerful language for modeling of physical systems, uses the tool Dymola. Another model was designed also with Modelica but with the help of the extension of the multi body library, which uses a methodology based on object orientation and symbolic manipulation of equations. With this last model it was possible to visualize an animation in real time 3D. The following step of the project was to do control design for the different models. The obtained simulations were shown in Dymola and Simulink. Finally experiments on the real process were developed, based on vision feedback

Microbioma sanguíneo: un desconocido con mucho que contar

Artículo de divulgación publicado en The Conversation España el día 28/08/2022.Ejércitos de bacterias corren también por nuestras venas. Conocerlas mejor puede ayudar a detectar y tratar diversas enfermedades.N

Are Reduced Levels of Coagulation Proteins Upon Admission Linked to COVID-19 Severity and Mortality?

Background: The link between coagulation system disorders and COVID-19 has not yet been fully elucidated. Aim: Evaluating the association of non-previously reported coagulation proteins with COVID-19 severity and mortality. Design: Cross-sectional study of 134 COVID-19 patients recruited at admission and classified according to the highest COVID-19 severity reached (asymptomatic/mild, moderate, or severe) and 16 healthy control individuals. Methods: Coagulation proteins levels (antithrombin, prothrombin, factor_XI, factor_XII, and factor_XIII) and CRP were measured in plasma by the ProcartaPlex Panel (Invitrogen) multiplex immunoassay upon diagnosis. Results: We found higher levels of antithrombin, prothrombin, factor XI, factor XII, and factor XIII in asymptomatic/mild and moderate COVID-19 patients compared to healthy individuals. Interestingly, decreased levels of antithrombin and factors XI, XII, and XIII were observed in those patients who eventually developed severe illness. Additionally, survival models showed us that patients with lower levels of these coagulation proteins had an increased risk of death. Conclusion: COVID-19 provokes early increments of some specific coagulation proteins in most patients. However, lower levels of these proteins at diagnosis might "paradoxically" imply a higher risk of progression to severe disease and COVID-19-related mortality.This study was supported by grants from Instituto de Salud Carlos III [ISCIII; Grant Number COV20/1144 (MPY224/20) to AF-R/MJ-S]. AF-R, MJ-S, and MR are Miguel Servet researchers supported and funded by ISCIII (Grant Numbers: CP14CIII/00010 to AF-R, CP17CIII/00007 to MJ-S, and CP19CIII/00002 to MR).S

Mercury and selenium in fish and shellfish: Occurrence, bioaccessibility and uptake by Caco-2 cells

This study evaluates Hg and Se concentrations and bioaccessibility (element solubilised after simulated gastrointestinal digestion) in 16 raw seafood species consumed in Spain. The concentrations varied greatly (Hg, 3.8-1621. ng/g wet weight, ww; Se, 84-1817. ng/g ww). Only one sample of swordfish exceeded the Hg limit permitted in Spain (1. mg/kg), and for this sample the Hg/Se molar ratio and Se Health Benefit Value food safety criteria also indicated the presence of a risk. Bioaccessibility of Hg (35-106%) and Se (17-125%) was very variable and the Hg/Se molar ratio in the bioaccessible fraction was less than one for all samples. Transport by Caco-2 cells, an intestinal epithelium model, was also evaluated from the swordfish bioaccessible fraction. Hg and Se transport from the food was less than 14%, and cell retention was much greater for Hg (49-69%) than Se (8-12%).This work was supported by Projects of the Spanish Ministry of Science and Innovation (AGL2005-00619) and the Generalitat Valenciana (AE06106), for which the authors are deeply indebted. Marta Calatayud received a BANCAJA-CSIC Personnel Training Grant in order to carry out this study

Mercurio total y bioaccesible en pescados crudos y cocinados

Trabajo presentado en el 3rd International FESTEM Symposium on Recent advances in trace element research: from experiments to nutritional and clinical applications in humans, celebrado en Santiago de Compostela (España), del 16 al 19 de mayo de 200

Leer es una actividad divertida

Enmarcado en el Plan de Fomento de la Lectura, emprendido por el centro en años pasados, se desarrollan una serie de actividades dirigidas a hacer de la lectura no un elemento más del curriculo, sino algo lúdico y divertido. Además de este objetivo principal se marcan otros como implicar a toda la comunidad educativa y favorecer el intercambio de experiencias entre ciclos; incrementar el número de ejemplares de la biblioteca de aula; participar en actividades organizadas desde bibliotecas municipales o desde la Concejalía de Educación; y fomentar la educación en valores a través de la lectura. Se realizan actividades para atraer al lector como la exposición de libros o guías de lectura, presentaciones de libros, la hora del cuento; otras para después de leer el libro como juegos de comprensión lectora o el libroforum; actividades para mejorar la expresión escrita como escribir poesías, creación de un cómic, hacer aportaciones a la revista escolar; actividades audiovisuales con libros de imágenes; acceso a la lectura a través de libros en soporte informático; y actividades colectivas en las que participa todo el centro como la celebración de la semana de la convivencia en la que se cuentan historias de todo el mundo, o la celebración del día del libro. Se adjunta material utilizado en el desarrollo de las actividades.Madrid (Comunidad Autónoma). Consejería de Educación. Dirección General de Ordenación AcadémicaMadridMadrid (Comunidad Autónoma). Subdirección General de Formación del Profesorado. CRIF Las Acacias; General Ricardos 179 - 28025 Madrid; Tel. + 34915250893ES