On a kind of Noether symmetries and conservation laws in k-cosymplectic field theory

This paper is devoted to studying symmetries of certain kinds of k-cosymplectic Hamiltonian systems in first-order classical field theories. Thus, we introduce a particular class of symmetries and study the problem of associating conservation laws to them by means of a suitable generalization of Noether’s theorem.Preprin

Reduction of polysymplectic manifolds

The aim of this paper is to generalize the classical Marsden- Weinstein reduction procedure for symplectic manifolds to polysymplectic manifolds in or der to obtain quotient manifolds which in- herit the polysymplectic structure. This generalization a llows us to reduce polysymplectic Hamiltonian systems with symmetries, suuch as those appearing in certai n kinds of classical field theories. As an application of this technique, an analogous to the Kirillov -Kostant-Souriau theorem for polysymplectic manifolds is obtained and some other mathematical examples are also analyzed. Our procedure corrects some mistakes and inaccuracies in pr evious papers [28, 48] on this subject.Preprin

A nonholonomic Newmark method

Using the nonholonomic exponential map, we obtain a new version of Newmark-type methods for nonholonomic systems (see also Jay and Negrut(2009) for a different extension). We give numerical examples including a test problem where the structure of reversible integrability responsible for good energy behaviour as described in Modin and Verdier (2020) is lost. We observe that the composition of two Newmark methods is able to produce good energy behaviour on this test problem.Fil: Anahory Simoes, Alexandre. IE Universidad; EspañaFil: Ferraro, Sebastián José. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto de Matemática Bahía Blanca. Universidad Nacional del Sur. Departamento de Matemática. Instituto de Matemática Bahía Blanca; Argentina. Universidad Nacional del Sur. Departamento de Matemática; ArgentinaFil: Marrero González, Juan Carlos. Universidad de La Laguna; EspañaFil: Martín de Diego, David. Universidad Nebrija; España. Instituto de Ciencias Matemáticas; Españ

Segmentation approaches for diabetic foot disorders

Thermography enables non-invasive, accessible, and easily repeated foot temperature measurements for diabetic patients, promoting early detection and regular monitoring protocols, that limit the incidence of disabling conditions associated with diabetic foot disorders. The establishment of this application into standard diabetic care protocols requires to overcome technical issues, particularly the foot sole segmentation. In this work we implemented and evaluated several segmentation approaches which include conventional and Deep Learning methods. Multimodal images, constituted by registered visual-light, infrared and depth images, were acquired for 37 healthy subjects. The segmentation methods explored were based on both visual-light as well as infrared images, and optimization was achieved using the spatial information provided by the depth images. Furthermore, a ground truth was established from the manual segmentation performed by two independent researchers. Overall, the performance level of all the implemented approaches was satisfactory. Although the best performance, in terms of spatial overlap, accuracy, and precision, was found for the Skin and U-Net approaches optimized by the spatial information. However, the robustness of the U-Net approach is preferred.This research was funded by the IACTEC Technological Training program, grant number TF INNOVA 2016–2021. This work was completed while Abián Hernández was beneficiary of a pre-doctoral grant given by the “Agencia Canaria de Investigacion, Innovacion y Sociedad de la Información (ACIISI)” of the “Consejería de Economía, Industria, Comercio y Conocimiento” of the “Gobierno de Canarias”, which is partly financed by the European Social Fund (FSE) (POC 2014–2020, Eje 3 Tema Prioritario 74 (85%))

Impacts of desert dust outbreaks on air quality in urban areas

Air pollution has many adverse effects on health and is associated with an increased risk of mortality. Desert dust outbreaks contribute directly to air pollution by increasing particulate matter concentrations. We investigated the influence of desert dust outbreaks on air quality in Santa Cruz de Tenerife, a city located in the dust export pathway off the west coast of North Africa, using air-quality observations from a six-year period (2012–2017). During winter intense dust outbreaks PM10 mean (24-h) concentrations increased from 14 µg m−3 to 98 µg m−3 , on average, and PM2.5 mean (24-h) concentrations increased from 6 µg m−3 to 32 µg m−3 . Increases were less during summer outbreaks, with a tripling of PM10 and PM2.5 daily mean concentrations. We found that desert dust outbreaks reduced the height of the marine boundary layer in our study area by >45%, on average, in summer and by ∼25%, on average, in winter. This thinning of the marine boundary layer was associated with an increase of local anthropogenic pollution during dust outbreaks. NO2 and NO mean concentrations more than doubled and even larger relative increases in black carbon were observed during the more intense summer dust outbreaks; increases also occurred during the winter outbreaks but were less than in summer. This has public health implications; local anthropogenic emissions need to be reduced even further in areas that are impacted by desert dust outbreaks to reduce adverse health effects.This activity has been undertaken in the framework of the World Meteorological Organisation Global Atmosphere Watch Urban Research Meteorology and Environment (GURME) project

Assessment of registration methods for thermal infrared and visible images for diabetic foot monitoring

This work presents a revision of four different registration methods for thermal infrared and visible images captured by a camera-based prototype for the remote monitoring of diabetic foot. This prototype uses low cost and off-the-shelf available sensors in thermal infrared and visible spectra. Four different methods (Geometric Optical Translation, Homography, Iterative Closest Point, and Affine transform with Gradient Descent) have been implemented and analyzed for the registration of images obtained from both sensors. All four algorithms´ performances were evaluated using the Simultaneous Truth and Performance Level Estimation (STAPLE) together with several overlap benchmarks as the Dice coefficient and the Jaccard index. The performance of the four methods has been analyzed with the subject at a fixed focal plane and also in the vicinity of this plane. The four registration algorithms provide suitable results both at the focal plane as well as outside of it within 50 mm margin. The obtained Dice coefficients are greater than 0.950 in all scenarios, well within the margins required for the application at hand. A discussion of the obtained results under different distances is presented along with an evaluation of its robustness under changing conditions.This research was funded by the IACTEC Technological Training program, grant number TF INNOVA 2016–2021

MicroPulse Lidar and Ceilometer inter-comparison during Saharan dust intrusions over the Canary Islands

Comunicación presentada en: V Reunión Española de Ciencia y Tecnología de Aerosoles – RECTA 2011 celebrada del 27 al 29 de junio de 2011 en CIEMAT, Madrid.This study presents an inter-comparison between a Vaisala CL51 ceilometer and a Micro Pulse Lidar (MPL) of both the Boundary Layer (BL) and the Saharan Air Layer (SAL) top heights during Saharan dust events from January to April 2011. This inter-comparison was performed at the Santa Cruz de Tenerife Observatory in Tenerife, Canary Islands, within the Marine Boundary Layer. From January to April the Saharan dust intrusions usually occur at lower altitudes within the BL. One of the main goals of this study is to determine whether the CL51 ceilometer is capable to detect mineral dust within the SAL. To our knowledge, this is the first time this kind of study is attempted on a site close to Saharan dust sources

Pathological changes of renal biopsy in Sjögren Syndrome

We are presenting the case of a 53-year-old woman with a history of Sjögren syndrome and a secondary antiphospholipid syndrome admitted at the Nephrology department for the evaluation of renal failure. The patient was initially diagnosed with tubulointerstitial nephritis and subsequently a membranoproliferative type I glomerulonephritis, secondary to cryoglobulins during the course of the disease. Repeated renal biopsies were required to confirm the diagnosis

Cesárea en el Hospital Verdi Cevallos Balda en el año 2015

En los últimos años, el parto por cesárea ha aumentado en relación al parto transpelviano a nivel mundial,  lo  cual  constituye  una  problemática  de  salud,  teniendo  en  cuenta  su  asociación  con  la morbimortalidad de las pacientes y el incremento de los costes que representa. En este trabajo, se realizó un estudio observacional descriptivo en el Hospital Regional Doctor Verdi Cevallos Bal- da de la ciudad de Portoviejo, entre enero y diciembre de 2015, con el objetivo de determinar las indicaciones más frecuentes de la cesárea. El universo estuvo constituido por 3037 gestantes. La muestra fue de 1260 cesareadas que cumplieron con el criterio de inclusión como cesárea primiti- va, y de exclusión para las cesáreas iteradas y los partos transpelvianos. Los resultados mostraron que al 56,1% de las gestantes se les practicó cesárea. Dentro de los diagnósticos de la cesárea se observó predominio de la desproporción cefalopélvica con un 42,5% el compromiso de bienestar fetal con un 26,8% y la corioamnionitis un 0,1%, correspondiendo a las indicaciones maternas, fe- tales y ovulares respectivamente. Se concluyó que la indicación de cesárea, debe ser el resultado de una evaluación integral del estado maternofetal, sobre el que se decide la realización de este procedimiento quirúrgico. Palabras clave: Cesárea, cefalopélvica, bienestar fetal, corioamnionitis Abstract: In recent years, cesarean has risen in relation to the transpelvic delivery worldwide, which is a pro- blem of health, taking into account its association with mortality and morbidity of patients and the increased costs which they represent. In this work, a descriptive observational study was conducted in the Regional Hospital Doctor Verdi Cevallos Balda in the city of Portoviejo, from January to De- cember 2015 with the objective of determining the most frequent indications for cesarean section. The universe consisted of 3037 pregnant women. The sample was cesarean section 1260 that met the  inclusion  criteria  as  early  cesarean  section, and exclusion  for  iterated  transpelvic  deliveries and caesarean sections. The results showed that 56.1% of pregnant women underwent caesarean section.  Within  diagnoses  prevalence  of  caesarean  section cephalopelvic  disproportion  to  42.5% was observed, the commitment of fetal well-being for 26.8% and 0.1% for chorioamnionitis, corres- ponding to maternal, fetal indications and ovular respectively. It was concluded that the indication of cesarean section, must be the result of a integral assessment of the maternal-fetal state, on which the realization of this surgical procedure is decided. Key words: Cesarean, cephalopelvic, fetal well-being, corioamnioniti

El patrimonio histórico como recurso didáctico en el Parque Nacional del Teide

[EN] Teide National Park is a geographic space that has unique geological and natural characteristics, which validated its declaration as World Heritage Site in 2017. However, human activity has been recorded since pre-hispanic times, whose actions left their mark in the territory, this has allowed archaeology to understand how “guanche” human occupation has been articulated in the high mountain contexts of Tenerife. Nowadays, high school teachers have the inconvenient of a severe lack of visitable archaeological sites in Tenerife. Spaces in which the students can elaborate their knowlege about the aboriginal cultures of The Canaries. Therefore, in this article we intend to analyze the educative potential of this geographic space for the teaching of the Social Sciences, and especifically for History. We present an educative proposal which integrates Teide National Park in the education methods of the pre-hispanic period, specially having in mind the use of archaeological ítems, guided visits or other activities.[ES] El Parque Nacional del Teide es un espacio geográfico que destaca por sus características geológicas y naturales únicas, las cuales le valieron su declaración como patrimonio mundial en 2017. No obstante se trata también de un territorio humanizado desde la etapa prehispánica, cuyas actividades dejaron su huella en el territorio, dando a la arqueología numerosas pautas para conocer cómo se articuló la ocupación guanche de la alta montaña de Tenerife. En la actualidad el profesorado de enseñanza secundaria parte de un inconveniente destacable que es la falta de yacimientos arqueológicos visitables en la Isla de Tenerife, espacios en los que el alumnado pueda consolidar su conocimiento relativo a las culturas aborígenes canarias. Por ello con nuestro trabajo se pretende hacer un análisis del potencial didáctico para las Ciencias Sociales, y específicamente para la materia de Historia, de un espacio geográfico como es el Parque Nacional del Teide, presentando una propuesta que integre a Las Cañadas del Teide en la enseñanza de la etapa prehispánica de las Islas, teniendo en cuenta aspectos relacionados con el uso de objetos arqueológicos, visitas guiadas o actividades relacionadas con la disciplina arqueológica.Ruiz González, H.; Marrero Salas, E.; García Ávila, JC.; Abreu Hernández, I.; Arnay De La Rosa, M. (2021). El patrimonio histórico como recurso didáctico en el Parque Nacional del Teide. En I Simposio anual de Patrimonio Natural y Cultural ICOMOS España. Editorial Universitat Politècnica de València. 215-222. https://doi.org/10.4995/icomos2019.2019.11718OCS21522