Minería y metalurgia durante la I Edad del Hierro. Procesos de cambio en el sur de Cataluña

El objetivo de este artículo es ofrecer un breve resumen de la investigación acerca de la minería y la metalurgia en la 1ª Edad del Hierro del sur de Catalunya, basado en el reciente trabajo de campo y los estudios analíticos en tres áreas: el valle bajo del río Siurana, la Terra Alta-Algars-Matarranya y el curso bajo del Sénia.Se discuten los diferentes procesos de cambio social.The aim of this paper is to present a summary of research concerning mining and metallurgy in the Early Iron Age of southern Catalonia, on the basis of recent fieldwork and analytical studies in three areas: the lower valley of the River Siurana; La Terra Alta-Algars-Matarranya; and the lower course of the River Sénia. Different processes of social change are discussed.Plan Nacional de I+D+I 2004-2007 proyectos ref. HUM 2004-04861-C02 y C03), y HUM2004-03121/HIS

System Based on an Inertial Measurement Unit for Accurate Flight Time Determination in Vertical Jumps

The world of elite sports has always been characterized by intense competition, where victories are often determined by minimal differences. This means that every little detail in the preparation of top-level athletes is crucial to their performance at the highest level. One of the most significant aspects to monitor is the jumping capacity, as it enables the measurement of performance, progression, and helps prevent injuries. Herein, we present the development of a system capable of measuring the flight time and height reached by the user, reporting the results through a smartphone using an Android ad-hoc application, which handles all the data processing. The system consists of an affordable and portable circuit based on an accelerometer. It communicates with the smartphone via UART using a Bluetooth module, and its battery provides approximately 9 h of autonomy, making it suitable for outdoor operations. To evaluate the system’s precision, we conducted performance tests (counter-movement jumps) with seven subjects. The results confirmed the system’s potential for monitoring high-level sports training sessions, as the average deviation obtained was only 2.1% (~0.01 s) in the analysis of flight time and 4.6% (~0.01 m) in jump height.Projects Sensorsportlab (ref. 07/UPB/22, Redes de Investigación en Ciencias Del Deporte 2022)Sensorsportlab II (ref. 11/UPB/23, Redes de Investigación en Ciencias Del Deporte 2023)Consejo Superior de Deportes (Ministerio de Cultura y Deporte)Andamove project (ref. EXP_74829) founded by the European Union by the NextGeneration EU program with the “Plan de Recuperación, Transformación y Resiliencia 2022” into the program “Proyectos de Investigación en Ciencia y Tecnología aplicada a la Actividad Física Beneficiosa para la Salud (AFBS) y la Medicina Deportiva” of the Consejo Superior de Deportes (Ministerio de Cultura y Deporte)

Experimental and simulated study of 3D-printed couplings’ suitability for industrial application

This paper explores the possibility of applying reverse engineering to flexible coupling spare parts through additive manufacturing. Although couplings’ simplicity makes them go unnoticed, they connect elements that transmit power between two shafts, thus being an essential component for most of the machinery currently used in the industry. In this study, flexible couplings with different infill density (60% and 80%) were 3D printed by the fused filament fabrication technique. The original and the additive manufactured couplings were modelled to compare their compressive response and energy-absorbing characteristics, and experimental tests were performed to validate finite element analysis. To derive an optimal material distribution within coupling structure, a generative design approach was conducted through nTopology software. With this novel simulation-driven design, it is possible to reduce the weight of the redesigned part up to 15.8% by defining the wall thickness of the internal structure based on the results of finite element simulation, while maintaining its functionality. Moreover, an economic-environmental study was carried out. Results ensure that the 3D printed prototypes are suitable for replacing the original one under its current operating conditions. Additionally, the economic study shows that the redesigned couplings allow companies to save more than €2700 per coupling in relation to CO2 emission payments

Effect of L-amino acid-based biostimulants on nitrogen use efficiency (NUE) in lettuce plants

Biostimulants are increasingly integrated into production systems with the goal of modifying physiological processes in plants to optimize productivity. Specifically, L-α-amino acid-based biostimulants enhance plant productivity through improved photosynthesis and increased assimilation of essential nutrients such as nitrogen (N). This element is a major component of fertilizers, which usually are applied in excess. Thus, the inefficient use of N fertilizers has generated a serious situation of environmental pollution issue. The use of biostimulants has the potential to address all the problems related to N fertilization. Therefore, the objective of this study is to analyze whether two biostimulants based on L-α-amino acid (Terra Sorb® radicular and Terramin® Pro) designed by Bioiberica, S.A.U company can compensate deficient N fertilization and test its effect on lettuce plants. Growth, photosynthetic, N accumulation, and N use efficiency (NUE) parameters were analyzed on lettuce leaves

Interactions between 2,4-bis-pteridine-1,5-benzodiazepine and group 12 dihalides: synthesis, spectral and XRD structural studies and theoretical calculations

2,4-Bis(1,3,7-trimethyl-pteridine-2,4(1H,3H)-dione-6-yl)-2,3-dihydro-2-methyl-1H-1,5-benzodiazepine (DLMBZD) has been prepared and its molecular and crystal structures have been determined from spectral and XRD data. The benzodiazepine ligand was reacted with zinc(II), cadmium(II) and mercury(II) chloride, bromide and iodide to give complexes with general formula [M(DLMBZD)X2]. The complexes have been synthesized and characterized by IR, NMR and elemental analysis. The structure of seven complexes has been obtained by single crystal X-ray diffraction. In all the cases, the metal is (2 + 2 + 1)-five-coordinated by two halide ligands, two nitrogen atoms from pyrazine and diazepine rings and a carbonyl oxygen from a pteridine ring. The coordinated-metal environment is a square-based pyramid, with increasing trigonality from Hg(II) to Zn(II) complexes. To coordinate the metals, the ligand folds itself, establishing four intramolecular σ–π interactions with the pyrimidine and pyrazine rings. A topological analysis of the electron density using the Quantum Theory of Atoms in Molecules and the complexes stability has been performed.Supported by the University of Jaén (Plan de Apoyo a la Investigación, al Desarrollo Tecnológico y a la Innovación), Junta de Andalucía (PAIDI groups FQM195, FQM273 and FQM337) and the State Secretariat for Research, Development and Innovation of Spanish Ministry of Economy and Competitivity (Project “Red de Excelencia MetalBio”, CTQ2015-71211-REDT)

Implantación de la metodología de clase al revés en una asignatura de programación y diseño orientado a objetos: análisis comparativo preliminar

En los últimos años se está popularizando en las aulas universitarias la implantación de la metodología docente conocida como “clase al revés”. En este trabajo se presenta un estudio aplicado a una asignatura de programación y diseño orientado a objetos, donde se han comparado los resultados de la implantación de esta metodología frente a los resultados obtenidos con un modelo de docencia más tradicional. Durante el primer semestre del curso académico 2021/2022, la asignatura se ha impartido en tres grupos diferentes (con un total de 253 estudiantes) utilizando una metodología distinta en cada grupo: 1) metodología tradicional, basada principalmente en la lección magistral; 2) clase al revés; y 3) clase al revés apoyada en instrucción entre pares. Se han recopilado y analizado las tasas de asistencia a clase, de rendimiento académico, los datos de la participación en las actividades previas planteadas en la clase al revés, la participación en las actividades de aprendizaje entre pares en el aula y la opinión de los estudiantes sobre las metodologías utilizadas. Los resultados más destacados indican que la clase al revés favorece la implicación en clase, lo que redunda en unas mejores tasas tanto de presentados como de rendimiento.In recent years, the “flipped classroom” methodology has become popular in higher education. This paper presents a study within a subject of object-oriented programming and design, where the results of the implementation of this methodology have been compared with those obtained with a more traditional teaching model. During the first semester of the 2021/2022 academic year, the subject has been taught in three different groups (with a total of 253 students) using a different methodology in each group: 1) traditional methodology, based mainly on master class; 2) flipped classroom; and 3) flipped classroom supported by peer instruction. Class attendance rates, academic performance, participation in previous activities in the flipped classroom, participation in peer learning activities in the classroom, and students' opinions on the methodologies used have been collected and analyzed. Our results indicate that the flipped classroom favors involvement in class, which results in better rates both in terms of attendance and performance

Citrus tristeza virus p23: a unique protein mediating key virus-host interactions

This Document is Protected by copyright and was first published by Frontiers. All rights reserved. it is reproduced with permission[EN] The large RNA genome of Citrus tristeza virus (CTV; ca. 20 kb) contains 12 open reading frames, with the 3 -terminal one corresponding to a protein of 209 amino acids (p23) that is expressed from an abundant subgenomic RNA. p23, an RNA-binding protein with a putative zinc-finger domain and some basic motifs, is unique to CTV because no homologs have been found in other closteroviruses, including the type species of the genus Beet yellows virus (despite both viruses having many homologous genes). Consequently, p23 might have evolved for the specific interaction of CTV with its citrus hosts. From a functional perspective p23 has been involved in many roles: (i) regulation of the asymmetrical accumulation of CTV RNA strands, (ii) induction of the seedling yellows syndrome in sour orange and grapefruit, (iii) intracellular suppression of RNA silencing, (iv) elicitation of CTV-like symptoms when expressed ectopically as a transgene in several Citrus spp., and (v) enhancement of systemic infection (and virus accumulation) in sour orange and CTV release from the phloem in p23-expressing transgenic sweet and sour orange. Moreover, transformation of Mexican lime with intron-hairpin constructs designed for the co-inactivation of p23 and the two other CTV silencing suppressors results in complete resistance against the homologous virus. From a cellular point of view, recent data indicate that p23 accumulates preferentially in the nucleolus, being the first closterovirus protein with such a subcellular localization, as well as in plasmodesmata. These major accumulation sites most likely determine some of the functional roles of p23.Research on CTV has been supported by a grant (Prometeo/2008/121) from the Generalitat Valenciana (GV), and by a grant (AGL2009-08052) from the Ministerio de Ciencia e Innovacion (MICINN)-Fondo Europeo de Desarrollo Regional. Susana Ruiz-Ruiz has been additionally supported by a postdoctoral contract from the GV (APOSTD/2012/020, Program VALi+d), Nuria Soler by a predoctoral fellowship from the IVIA, and Carmen Fagoaga by a postdoctoral contract "Ramon y Cajal" from the MICINN.Flores Pedauye, R.; Ruiz Ruiz, S.; Soler, N.; Sanchez Navarro, JA.; Fagoaga García, CC.; López Del Rincón, C.; Navarro Lucas, L.... (2013). Citrus tristeza virus p23: a unique protein mediating key virus-host interactions. Frontiers in Microbiology. 4(98):1-9. https://doi.org/10.3389/fmicb.2013.00098S1949

Investigación y propuestas de intervención. Informe Final del Proyecto AGIS en España Septiembre 2005- Septiembre 2007

El informe que se presenta a continuación se encuadra dentro del proyecto AGIS, denominado el “Talón de Aquiles de Europa” (“Achilles´ Heel”), con una duración bianual (Octubre 2005- Octubre 2007), y cofinanciado por la Dirección General de Justicia, Libertad y Seguridad de la Comisión Europea. El proyecto tiene como objetivo analizar la interrelación entre los fenómenos de victimización, delincuencia y malestar social que puede plantearse en la segunda generación de inmigrantes en diferentes espacios europeos (Italia, España, Alemania, Lituania y República Checa), además de realizar acciones de intervención social en el ámbito formativo a los principales actores sociales relacionados con dicha población. En el caso de España, la investigación se ha realizado en las ciudades de Albacete (Centro de Investigación en Criminología de la Universidad de Castilla- La Mancha) y en Granada (Albant & Inedit S. L.) si bien sólo en la ciudad de Albacete se han realizado las acciones de formación. Ambos socios han utilizado los mismos conceptos teóricos e instrumentos metodológicos para analizar el colectivo de estudio en sus localidades respectivas. El análisis se ha focalizado en la denominada “generación intermedia” de inmigrantes, debido a que el fenómeno de la inmigración es muy reciente en el Estado español (apenas cuenta con 20 años), y por tanto, no se puede considerar la “segunda generación” como un segmento poblacional diferenciado. En definitiva, con este informe se quiere presentar una visión de la situación de los menores hijos de extranjeros en el contexto español

Avance al estudio de la Cueva de Benzú (Ceuta). Nuevas perspectivas de investigación de sociedades tribales en el área norteafricana del Estrecho de Gibraltar

Las excavaciones en la Cueva de Benzú aportan interesantes datos para el estudio de las sociedades tribales. Está situada en la región Atlántica-Mediterránea, en el Norte de África. Tiene una datación en el VI milenio BC.The excavations in Benzu’s Cave provides interesting facts to the study of the tribal societies. It is placed between the Atlantic and the Mediterranean region, in the North of Africa. It is dated in the VI millennium BC.10 página