Sistemas circulares de radionavegación

Estudio de los principios de funcionamiento del sistema radiogoniométric

Problem Based Learning: a tool to improve maritime safety learning in the Merchant Maritime University degrees

Since 2010, the University of Cádiz offers three new degree programs related to merchant marine officers studies. These three degrees cover the training and certification of deck officers, marine engineers and radio- electronic officers, clustered under the EINAMAR (Escuela de Ingeniería Marina,Naútica y Radioelectrónica) umbrella. These degrees are designed to provide the students not only with the proper academic certificate but also with a fully worldwide recognized professional certificate. This is the reason why the studies not only have to fully fulfill the academic quality requirements laid down by ANECA (Agencia Nacional de Evaluación de la Calidad y Acreditación) or DEVA (Dirección de Evaluación y Acreditación – Agencia Andaluza del Conocimiento-) but also with the standard qualifications set up by the International Convention on Standard of Training, Certification and Watchkeeping (STCW 95) for seafarers as amended in 2010 (Manila Amendments). According to this, as far as the students finish successfully their studies, and after an onboard training period, they will be able to obtain both, the academic and the professional certificates. “Maritime Safety” is a one of the core subjects for these three programs and it has been designed as a transversal subject in such a way that all the students have the same contents and schedule. This subject aims to provide the students with the theoretical and practical training to cope with any situation involving fire prevention and firefighting as well as incident and accident prevention and resolution on board. It also introduces student into the world of contingency planning and evacuation procedures on board, the knowledge of how to use survival crafts and equipment to increase probabilities of survival when abandoning the ship, and the most appropriate techniques and procedures when abandoning the ship and boarding the survival crafts. The main aim of the practical part of the subject is to improve the on board safety and risk awareness and to let the students get used to the most appropriate techniques and procedures as well as the use and maintenance of the protective equipment available on board. To achieve this goal, problem based learning techniques related to real situations on board have been applied. One of the specific practical workshop that have been implemented during the course, deals with the student training level in the use of SCBA (Self-contained reathing apparatus) and other protective equipment as well as orientation and search and rescue techniques within hostile environments with sensorial losses. As these situations can arise on board students must be familiar with them in order to properly face them. The aim of this specific workshop is not only to improve the students’ safety and risk awareness but also to encourage, strengthen and increase other professional and social skills

CaptuRING: A do‐it‐yourself tool for wood sample digitization

Producción CientíficaStandard procedures to obtain high-quality images of wood samples have become a bottleneck in the digitization of dendrochronology. Digitization is currently dominated by flatbed scanners, but the use of these devices is limited by sample length and surface flatness. Although several solutions based on digital photography have been published, they lack effective digitization processes or are too expensive to be widely adopted. Free open-source software and hardware has emerged as an alternative to create research tools that combine reduced costs with high reliability. Here we present CaptuRING, an open-source tool for wood sample digitization combining a do-it-yourself hardware based on Arduino® with a DSLR camera and a free open-source software with an easy-to-use graphical user interface. We compared CaptuRing with image acquisition from a standard flatbed scanner Epson® V750PRO. CaptuRING outperforms scanner image resolution and sharpness, while it removes sample size limitations. Moreover, CaptuRing performs this task in less than half of the time needed by Epson® V750PRO flatbed scanner. CaptuRING emerges as a reliable and low-cost tool to capture high-resolution images of wood samples boosting current digitization processes. The combination of free open software and hardware empowers dendrochronology to advance in wood sample digitization.Junta de Castilla y León, project OUTBREAK (VA171P20) and (IR2020-1-UVA08)Ministerio de Ciencia, Innovación y Universidades, grant number (CGL2017-87309-P) (MGH PRE2018-084106) and project PROWARM (PID2020-118444GA-I00)Universidad Politécnica de Madrid (through Project RP200060107

Addition of Olive Leaf Extract to a Mixture of Algae and Extra Virgin Olive Oils Decreases Fatty Acid Oxidation and Synergically Attenuates Age-Induced Hypertension, Sarcopenia and Insulin Resistance in Rats

Olive-derived products, such as virgin olive oil (EVOO) and/or olive leaf extracts (OLE), exert anti-inflammatory, insulin-sensitizing and antihypertensive properties and may be useful for stabilizing omega 3 fatty acids (n-3 PUFA) due to their high content in antioxidant compounds. In this study, the addition of OLE 4:0.15 (w/w) to a mixture of algae oil (AO) rich in n-3 PUFA and EVOO (25:75, w/w) prevents peroxides formation after 12 months of storage at 30 °C. Furthermore, the treatment with the oil mixture (2.5 mL/Kg) and OLE (100 mg/Kg) to 24 month old Wistar rats for 21 days improved the lipid profile, increased the HOMA-IR and decreased the serum levels of miRNAs 21 and 146a. Treatment with this new nutraceutical also prevented age-induced insulin resistance in the liver, gastrocnemius and visceral adipose tissue by decreasing the mRNA levels of inflammatory and oxidative stress markers. Oil mixture + OLE also attenuated the age-induced alterations in vascular function and prevented muscle loss by decreasing the expression of sarcopenia-related markers. In conclusion, treatment with a new nutraceutical based on a mixture of EVOO, AO and OLE is a useful strategy for improving the stability of n-3 PUFA in the final product and to attenuate the cardiometabolic and muscular disorders associated with aging

Olive Leaf Extract Supplementation to Old Wistar Rats Attenuates Aging-Induced Sarcopenia and Increases Insulin Sensitivity in Adipose Tissue and Skeletal Muscle

Aging is associated with increased visceral adiposity and a decrease in the amount of brown adipose tissue and muscle mass, known as sarcopenia, which results in the development of metabolic alterations such as insulin resistance. In this study, we aimed to analyze whether 3-week supplementation with a phenolic-rich olive leaf extract (OLE) to 24 months-old male Wistar rats orally (100 mg/kg) attenuated the aging-induced alterations in body composition and insulin resistance. OLE treatment increased brown adipose tissue and attenuated the aging-induced decrease in protein content and gastrocnemius weight. Treatment with OLE prevented the aging-induced increase in the expression of PPAR-γ in visceral and brown adipose tissues, while it significantly increased the expression of PPAR-α in the gastrocnemius of old rats and reduced various markers related to sarcopenia such as myostatin, HDAC-4, myogenin and MyoD. OLE supplementation increased insulin sensitivity in explants of gastrocnemius and epididymal visceral adipose tissue from aged rats through a greater activation of the PI3K/Akt pathway, probably through the attenuation of inflammation in both tissues. In conclusion, supplementation with OLE prevents the loss of muscle mass associated with aging and exerts anti-inflammatory and insulin-sensitizing effects on adipose tissue and skeletal muscle

Waste-polystyrene foams-derived magnetic carbon material for adsorption and redox supercapacitor applications

The current impact of plastic waste on the environment and nature pushes for coming up with methods for their efficient reuse and recycle. Expanded polystyrene waste, massively produced worldwide, is presented in this work as a novel precursor of magnetic activated carbons (MAC) for the first time. A simple methodology based on the impregnation of EPS samples with Fe3+ in solution, followed by pyrolysis under Ar pressure and chemical activation is proposed. The as-prepared carbonaceous magnetic materials present nanometric phases of Fe0, Fe3C, and Fe3O4, and showed high specific surface area (672 m2 g−1) and total pore volume (0.35 cm3 g−1), one of the highest found in the carbonaceous magnetic materials literature. Their excellent textural, chemical and electrical properties, combined with the possibility of magnetically collection and regeneration after operation guaranteed an excellent performance of MAC in two different applications: as adsorbents of organic contaminants and as electrodes of redox supercapacitors.The authors would like to thank the Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) and Fundação de Amparo à Pesquisa do Estado de Minas Gerais (FAPEMIG) for the financial support. P.F.R. Ortega acknowledges the FAPEMIG (DOF nº. 2720262/2018). The authors are also grateful to Rede Mineira de Química. R.L. Lavall is recipient of fellowship from CNPq (grant number 313304/2017-3). N. C. F. Machado, K. H. A. Mendes, and L. A. M. de Jesus would like to thank CEFET-MG and FAPEMIG for scholarships receivedPeer reviewe

Kwapa: Gente del río. Estrategias transmedia de impacto social

PAP Alter Código produce materiales de interacción audiovisual que se organizan en un universo transmedia, trabaja con personas de todas las edades, su meta es difundir representaciones no estigmatizantes de grupos socialmente desfavorecidos, además de compartir esta visión a todo aquel que colabore en el proyecto. En la temporada de verano 2023, el equipo Alter CÓDIGO continuó con el desarrollo del videojuego “A la orilla del río”, para ello la organización del trabajo se dividió en múltiples áreas tanto como comunitarias como digitales para dar una mayor profundidad al producto. Los avances más significativos van desde una versión más actualizada del guion, storyboards, una primera animación, un demo, este último de lo que sería el gameplay, y un minijuego. Asimismo, se muestra la vinculación comunitaria e impacto social que se logró con el desarrollo de los talleres de intervención fotográfica con niños acerca de su territorio. Paralelamente se aborda la creación de redes sociales y página web para la difusión del proyecto por fuera del PAP. En los dos meses de trabajo se cumplieron con los ideales del Proyecto de Aplicación Profesional y se logró una difusión transmedia. A pesar de que el proyecto aún no llega a su finalización, los avances y el alcance superaron las metas que se otorgaron al inicio de la temporada.ITESO, A.C

Clonal chromosomal mosaicism and loss of chromosome Y in elderly men increase vulnerability for SARS-CoV-2

The pandemic caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2, COVID-19) had an estimated overall case fatality ratio of 1.38% (pre-vaccination), being 53% higher in males and increasing exponentially with age. Among 9578 individuals diagnosed with COVID-19 in the SCOURGE study, we found 133 cases (1.42%) with detectable clonal mosaicism for chromosome alterations (mCA) and 226 males (5.08%) with acquired loss of chromosome Y (LOY). Individuals with clonal mosaic events (mCA and/or LOY) showed a 54% increase in the risk of COVID-19 lethality. LOY is associated with transcriptomic biomarkers of immune dysfunction, pro-coagulation activity and cardiovascular risk. Interferon-induced genes involved in the initial immune response to SARS-CoV-2 are also down-regulated in LOY. Thus, mCA and LOY underlie at least part of the sex-biased severity and mortality of COVID-19 in aging patients. Given its potential therapeutic and prognostic relevance, evaluation of clonal mosaicism should be implemented as biomarker of COVID-19 severity in elderly people. Among 9578 individuals diagnosed with COVID-19 in the SCOURGE study, individuals with clonal mosaic events (clonal mosaicism for chromosome alterations and/or loss of chromosome Y) showed an increased risk of COVID-19 lethality

Sin / Sense

Sexto desafío por la erradicación de la violencia contra las mujeres del Institut Universitari d’Estudis Feministes i de Gènere «Purificación Escribano» de la Universitat Jaume

Unraveling the relevance of carbon felts surface modification during electrophoretic deposition of nanocarbons on their performance as electrodes for the VO2+/VO2+ redox couple

The energy efficiency of vanadium redox flow batteries (VRFB) greatly depends on the electrochemical performance of the electrodes that constitute these devices, so it is essential to develop more efficient electrode materials with optimized structure and physicochemical properties. Carbon-based felts are commonly used as electrodes in such devices due to their high chemical stability in acid media, high electrical conductivity and their three-dimensional structure. However, they show low reversibility and electrocatalytic activity, especially for the VO2+ / VO2+ redox couple. In the quest for improving the electrochemical behaviour of carbon-based felts, it has been proposed to modify them with functionalized carbon nanotubes or graphene oxide by electrophoretic deposition. To elucidate if the improvements achieved on these electrodes can be really ascribed to the presence of the carbon nanomaterials or to the oxidation undergone by the fibers during this treatment, the electro-oxidation of a pristine rayon-based graphitized carbon felt was performed in parallel. The electro-oxidized felt exhibits the best behaviour, suggesting that the improved performance obtained for the electrodes modified with nanocarbons are mainly influenced by the oxidation of the fibers.The authors would like to acknowledge the support from the Spanish Research Agency AEI/PID2019-104028RB-100, the Principality of Asturias Research Council (PCTI) through EU (FEDER) IDI/2018/000121 and CSIC (PTI FlowBat: 201980E101). V.G Rocha would like to thank the Spanish Government (Ramón y Cajal fellowship, RYC2018-024404-I).Peer reviewe