Carbon footprint is one of the most widely used tools for assessing the environmental impacts of the production and utilization of concrete as well as of the components derived from it, representing the amount of carbon dioxide and other greenhouse gases associated with this product, expressed as CO2 equivalents. In this paper, carbon footprint was used to compare the environmental performance in the production phase of a concrete made with both recycled and crushed virgin limestone aggregates, using a life cycle analysis methodological approach. Research outcomes revealed, as expected, that carbon dioxide equivalent emissions decreased slightly as the use of recycled aggregates increased. Emissions for concrete with 0.5 w/c were between 347 and 351 kg of CO2-e/m3. It was also corroborated that cement is the material with the greatest influence on greenhouse gas emission generation in the concrete’s production phase, regardless of the use of recycled or virgin aggregates.

ResumenLa evolución del sistema educativo ha provocado cambios significativos en la formación permanente del profesorado, por tanto, es necesario un diagnóstico de necesidades utilizando instrumentos y metodologías que informen de las demandas formativas profesionales. En este sentido, el objetivo principal del estudio se centra en aportar luz sobre las percepciones y expectativas del profesorado acerca de la formación permanente en la Comunidad Autónoma de Galicia. Para ello, se utilizó una metodología evaluativa centrada en el contexto, entrada, proceso y producto (diseño CIPP). Los resultados confirman que la evolución de la formación se viene incrementando en su oferta pero disminuyendo su eficacia. Además, se ha comprobado la necesidad de reestructurar la formación permanente, apostando por un modelo más global, con cobertura en todas las necesidades formativas del profesorado. El gran reto de la formación permanente del profesorado es la transferibilidad de la misma al contexto del aula, una cuestión sencilla pero muy difícil de evaluar. Mejorar la calidad educativa depende directamente de la eficiencia y excelencia en la formación docente, la cual debería someterse a un proceso de revisión y actualización permanente.Palabras clave: formación del profesorado, evaluación, eficacia, calidad. AbstractThe evolution of the education system has led to significant changes in teacher training, therefore, a needs assessment using tools and methodologies to inform professional training demands necessary. In this sense, the main objective of the study focuses on shed light on the perceptions and expectations of teachers about lifelong learning. For this purpose, was used an evaluative methodology focused on the context, input, process and product (design CIPP). The results confirm that the evolution of the training has been increasing in its bid but decreasing its effectiveness. In addition, it´s founded the need to restructure the permanent formation, opting for a more global model, with coverage in all the training needs of teachers. The great challenge of teacher training is to achieve an improvement in classroom practice, but simply a matter very difficult to assess. Improve the quality of education depends directly on the efficiency and excellence in teacher training, which should undergo a continuous process of review and permanent recycled.

An adequate mixing time in concrete casting allows to achieve a homogeneous mass and improve compressive strength and durability. However, the lack of standards for cast-in-place concrete causes that the builders use different mixing times according to the locality usages and customs, which results in a high variability of the expected quality. In this paper, fresh and hardened cast-in-place concrete was evaluated. Seven samples were tested with different mixing time using portable rotary drum mixer. The used materials were ordinary portland cement, water and high absorption aggregates, fine and coarse, coming from a limestone crushing process. The results of the research showed that the mixing time and environmental temperature had no apparent influence on the slump of the mixtures, and trapped air and compressive strength increased slightly with increasing mixing time. Finally, it was found that the recommended mixing time, with rotation speed of 28 RPM, is 2.5 minutes, which differs from the common practice in the study area.

Today the majority of the research on rock art projects are based on the material remains in the form of painting and engraving. What exists now are not but the remains or part of that which the hand of man drew or recorded in the past. The combined action of natural and anthropogenic phenomena have been generating processes of deterioration which have led to the loss, on many occasions, an important part of the representations. Preserved signs are that make up the visible remains visually and therefore are the object of study by specialists. The implementation of a new mathematical techniques that work from data obtained using current of image acquisition, and mature technologies allow the recovery of representations, to a state of ""latent image"" after their deterioration process remain on the surface glyphs support, but are in no way visible to the human eye, and is the tool base used in the last years to document and analyse these figures. This makes that a large part of the knowledge generated in this period is only based on a part of the set of representations, the visible.The current conceptual, scientific and technological capabilities provide us tools to retrieve non-visible representations, helping to set up new models that tend to contain all of the information shown, changing in a very significant way representations or models for the study and the dissemination of cave images sets, forcing us logically

Introduction: Cancer patients are more susceptible to infections and infection can be more severe than in patients without cancer diagnosis. We conducted this retrospective study in patients admitted for SARS-CoV-2 infection in order to find differences in inflammatory markers and mortality in cancer patients compared to others. Methods: We reviewed the electronic records of patients admitted for SARS-CoV-2 infection confirmed by PCR from March to September 2020. Data on socio-demographics, comorbidities, inflammatory makers and cancer-related features were analysed. Results: 2,772 patients were admitted for SARS-CoV-2, to the Hospital Universitario Ramón y Cajal in Madrid during this period. Of these, 2597 (91%) had no history of neoplastic disease, 164 (5.9%) patients had a prior history of cancer but were not undergoing oncological treatment at the time of infection, and 81 (2.9%) were in active treatment. Mortality in patients without a history of cancer was 19.5%, 28.6% for patients with a prior history of cancer and 34% in patients with active cancer treatment. Patients in active oncology treatment with the highest mortality rate, were those diagnosed with lung cancer (OR 5.6 95% CI 2.2-14.1). In the multivariate study active oncological treatment (OR 2.259 95% IC 1.35-3.77) and chemotherapy treatment (OR 3.624 95% IC 1.17-11.17), were statistically significant factors for the risk of death for the whole group and for the group with active oncological treatment, respectively. Conclusion: Cancer patients on active systemic treatment have an increased risk of mortality after SARS-CoV-2 infection, especially with lung cancer or chemotherapy treatment.