Grabado sostenible. Experiencias y prácticas de mediación educativa en Primaria
Educación medioambiental · Infancia · Sostenibilidad · Grabado menos tóxico · Fotopolímeros
La responsabilidad de educar bajo modelos de sostenibilidad es tarea de todos. Conceptos como medio ambiente, ecología, entorno, ecosistema,… deben estar presentes en las enseñanzas del niño desde la más temprana edad. Así pues centramos nuestra práctica en la Educación Primaria con el objetivo de concienciar del detrimento medioambiental y fomentar actitudes y comportamientos favorables para el logro de un desarrollo sostenible. Para ello proponemos utilizar uno de los procedimientos artísticos que se realizan con menos frecuencia en el aula, el grabado y las técnicas de estampación. A través de procesos que fomentan el desarrollo de la atención, la percepción, la imaginación y la creatividad de forma responsable, trabajaremos las posibilidades tecnológicas que ofrecen las técnicas gráficas más novedosas, el uso de los fotopolímeros en el aula. La elaboración de dibujos para ser procesados con procedimientos “menos tóxicos” nos permitirá lograr conductas de sensibilización en cuanto a una educación ambiental para la sostenibilidad.
http://www.e-revistes.uji.es/index.php/artseduca/article/view/2662
Gradiente ambiental em comunidades arbóreas no baixo rio Jacuí
Floresta Subtropical, diversidade, ecología, solos florestais
A região da Depressão Central do Rio Grande do Sul estende-se por planícies e relevos suaves ondulados, com predomínio de florestas de galeria. Este estudo teve o objetivo de investigar a estrutura e a diversidade dos remanescentes de Floresta Estacional Decidual em diferentes posições na paisagem de pequenos tributários ao longo de uma microbacia em Pantano Grande, RS. Os levantamentos foram realizados em 40 pontos amostrais com 500 m2. Foi constatada a existência de três grupos ecológicos, espacialmente correlacionados à posição no relevo, tendo diferentes estágios de conservação, diversidade, estrutura e florística. O grupo 1, formação submontana (FS), destacou-se pela maior densidade de indivíduos nas maiores classes de diâmetro e pela maior altura, com alta dominância ecológica, determinada por uma particular espécie tolerante à sombra, Actinostemon concolor. O grupo 2, FA/FS, revelou-se com maior diversidade que os demais grupos, apresentando menor dominância ecológica. O grupo 3, formação aluvial (FA), foi caracterizado por indivíduos arbóreos menores e pela presença dominante deSebastiania commersoniana
Fabrício de Araújo Pedron, Solon Jonas Longhi, Marcelo Callegari Scipioni, Franklin Galvão
Gradientes de diversidade nas comunidades de peixes da bacia do rio Iguatemi, Mato Grosso do Sul, Brasil Diversity gradients in fish communities of Iguatemi river basin, Mato Grosso do Sul, Brazil
Community ecology, Diversity, Fish, Iguatemi river, diversidade, ecología de comunidades, peixes, rio Iguatemi
Com o objetivo de verificar a importância da variação longitudinal, sazonal e a influência das características físicas e químicas da água sobre a diversidade de espécies de peixes realizamos amostragens trimestrais, entre Novembro/1999 e Agosto/2000, em três pontos amostrais no rio Jogui e oito pontos amostrais no rio Iguatemi-MS. A variação longitudinal foi mais importante que a variação sazonal na determinação da riqueza e número de indivíduos no rio Jogui, no entanto, a equitabilidade não apresentou diferença significativa sazonal ou longitudinal. No rio Jogui 78,3% da variação na riqueza de espécies, 81,6% no número de indivíduos e 41,1% na equitabilidade foram explicadas pelas características físicas e químicas da água. No rio Iguatemi nós não detectamos diferenças estatisticamente significativas longitudinais ou sazonais nos descritores analisados das comunidades nem influência significativa dos fatores ambientais.In order to verify the importance of longitudinal and seasonal variations and the effect of physical and chemical water characteristics to fish species diversity we accomplished three-month samplings, between November/1999 and August/2000, in three selected points in the Jogui River and eight points in the Iguatemi River-MS. The longitudinal variation was more important than seasonal variation in determining richness and number of individuals in the Jogui River, however, evenness did not present statistically significant differences either longitudinal or seasonal. In the Jogui River 78.3% of species richness, 81.6% of number of individuals and 41.1% of evenness variation was explained by the water chemical and physical characteristics. In the Iguatemi River we did not detect longitudinal or seasonal statistically significant differences in the analyzed community descriptors nor significant influence of environmental factors.
Miguel Petrere Junior, Yzel Rondon Súarez
Fundação Zoobotânica do Rio Grande do Sul
Graduate generic competences from the perspective of VNU employers
Graduates, generic competences, employer perspective, vietnam national university hanoi (vnu)
The COVID-19 pandemic has accelerated a shift to new ways of working, prompting companies to reimagine how, where and by whom work gets done (World Economic Forum & Watson, 2020). This shift was already under way with the technological changes of the Fourth Industrial Revolution. Employers are looking for workers who are able to learn new knowledge and skills, adapt to the workplace, be sufficiently flexible to move jobs, and expand on the knowledge learnt at university. Applying the theory of generic competences and the model of thirteen generic competences for university graduates of the Tuning Asia - South East project (TASE), this research investigates the perspectives of VNU stakeholders about the generic competences of VNU graduates. In particular, this paper discusses the employers’ perspective of VNU graduates’ generic competences. Although employers rate all generic competences as important, they evaluated graduates’ achievement of seven generic competences as being at a less than satisfactory level. The findings of the research point to the need for the university to focus more on developing generic competences throughout the delivery of programs.
Grain Yield Stability of Cereal-Legume Intercrops Is Greater Than Sole Crops in More Productive Conditions
barley (Hordeum vulgare), crop diversification, faba bean (Vicia faba), pea (Pisum sativum), wheat (Triticum aestivum), yield stability
The intercropping of two or more crop species on the same piece of land at a given time has been hypothesized to enhance crop yield stability. To address this hypothesis, we assessed the grain yield stability of various barley-pea and wheat-faba bean mixtures grown in seven experimental field trials (locations) across Europe during two years with contrasting weather (2017 and 2018). Three different yield stability measures were used, all based on the expected yield variability of the mixture components grown as sole crops, and the corresponding observed yield variability of the same components grown in 50:50 mixtures in a replacement design. Stability indices were calculated as ratios between the expected and observed variabilities, with values > 1 indicating greater stability of the intercrops. Mean grain yields tended to be higher in intercrops than sole crops. However, in contrast to our hypothesis, the observed (intercrop) yield stability was similar or lower than the expected (sole crop) stability in most locations except one. Furthermore, yield stability significantly increased with increasing mean yields when assessed across differentially productive locations. The results are relevant for the designing of intercropping systems as a means to increase yield stability and the resilience of cropping systems.
Martin Weih, Alison J. Karley, Adrian C. Newton, Lars P. Kiær, Christoph Scherber, Diego Rubiales, Eveline Adam, James Ajal, Jana Brandmeier, Silvia Pappagallo, Angel Villegas-Fernández, Moritz Reckling, Stefano Tavoletti
Gran propiedad y productividad agrícola en el campo del sur de España
Andalucia, Atraso, Extremadura, Gran propiedad, Productividad agrícola, sector agrario
El sector agrario sigue siendo muy importante en las regiones españolas de Andalucía y Extremadura. Las estrategias de la gran propiedad han organizado y organizan los sistemas agrarios dominantes en ambas regiones. Intentamos relacionar dichas estrategias con la escasa productividad de la agricultura del Sur de España. La hipótesis de partida es demostrar que las capacidades productivas de Andalucía y Extremadura están subdesarrolladas y, además, que la combinación de la agricultura industrializada con la que incorpora los nuevos planteamientos de la agricultura sostenible están disminuyendo aún más su productividad. El gran propietario como “señorito”, el jornalero “atado” a la tierra y el estancamiento de las fuerzas productivas son los tres ingredientes que explican el atraso del sur de España.
Consejo Superior de Investigaciones Científicas
http://estudiosgeograficos.revistas.csic.es/index.php/estudiosgeograficos/article/view/81
Grand Challenges in Infectious Diseases: Are We Prepared for Worst-Case Scenarios?
infectious diseases, mortality, vaccines, covid-19, host-pathogen interactions, antimicrobial multidrug resistance, polymicrobial disease, research strategies
Grape Cluster Detection Using UAV Photogrammetric Point Clouds as a Low-Cost Tool for Yield Forecasting in Vineyards
Color thresholding, fruit detection, precision viticulture, remote sensing, unsupervised and automated analysis
Yield prediction is crucial for the management of harvest and scheduling wine production operations. Traditional yield prediction methods rely on manual sampling and are time-consuming, making it difficult to handle the intrinsic spatial variability of vineyards. There have been significant advances in automatic yield estimation in vineyards from on-ground imagery, but terrestrial platforms have some limitations since they can cause soil compaction and have problems on sloping and ploughed land. The analysis of photogrammetric point clouds generated with unmanned aerial vehicles (UAV) imagery has shown its potential in the characterization of woody crops, and the point color analysis has been used for the detection of flowers in almond trees. For these reasons, the main objective of this work was to develop an unsupervised and automated workflow for detection of grape clusters in red grapevine varieties using UAV photogrammetric point clouds and color indices. As leaf occlusion is recognized as a major challenge in fruit detection, the influence of partial leaf removal in the accuracy of the workflow was assessed. UAV flights were performed over two commercial vineyards with different grape varieties in 2019 and 2020, and the photogrammetric point clouds generated from these flights were analyzed using an automatic and unsupervised algorithm developed using free software. The proposed methodology achieved R2 values higher than 0.75 between the harvest weight and the projected area of the points classified as grapes in vines when partial two-sided removal treatment, and an R2 of 0.82 was achieved in one of the datasets for vines with untouched full canopy. The accuracy achieved in grape detection opens the door to yield prediction in red grape vineyards. This would allow the creation of yield estimation maps that will ease the implementation of precision viticulture practices. To the authors’ knowledge, this is the first time that UAV photogrammetric point clouds have been used for grape clusters detection.
Maite Loidi, Jorge Torres-Sánchez, Francisco Javier Mesas-Carrascosa, Luis-Gonzaga Santesteban, Francisco Manuel Jiménez-Brenes, Oihane Oneka, Ana Villa-Llop, Francisca López-Granados
GraphDNA: a Java program for graphical display of DNA composition analyses
Abstract Background Under conditions of no strand bias the number of Gs is equal to that of Cs for each DNA strand; similarly, the total number of Ts is equal to that of As. However, within each strand there are considerable local deviations from the A = T and G = C equality. These asymmetries in nucleotide composition have been extensively analyzed in prokaryotic and eukaryotic genomes and related to chromosome organization, transcription orientation and other processes in certain organisms. To carry out analysis of intra-strand nucleotide distribution several graphical methods have been developed. Results GraphDNA is a new Java application that provides a simple, user-friendly interface for the visualization of DNA nucleotide composition. The program accepts GenBank, EMBL and FASTA files as an input, and it displays multiple DNA nucleotide composition graphs (skews and walks) in a single window to allow direct comparisons between the sequences. We illustrate the use of DNA skews for characterization of poxvirus and coronavirus genomes. Conclusion GraphDNA is a platform-independent, Open Source, tool for the analysis of nucleotide trends in DNA sequences. Multiple sequence formats can be read and multiple sequences may be plotted in a single results window.
Tcherepanov Vasily, Brown Gordon, Horspool Daniel, Thomas Jamie M, Upton Chris
Biology (General), Computer applications to medicine. Medical informatics
Graphene-Based Catalysts for Ozone Processes to Decontaminate Water
Ozone, catalytic ozonation, graphene oxide, photocatalytic ozonation, water contaminants
The use of graphene-based materials as catalysts in both ozone and ozone/radiation processes is creating interest among researchers devoted to the study of advanced oxidation processes (AOPs) for the degradation of organic pollutants in water. In this review, detailed explanations of catalytic and photocatalytic ozonation processes mediated by graphene-based materials are presented, focusing on aspects related to the preparation and characterization of catalysts, the nature of the water pollutants treated, the type of reactors and radiation sources applied, the influence of the main operating variables, catalyst activity and stability, and kinetics and mechanisms.
Fernando J. Beltrán, Pedro M. Álvarez, Olga Gimeno