Technology as a means of teaching mathematical education: an experience with university inicial students

Este trabajo expone el diseño e implementación de una propuesta tecno-pedagógica, cuyo objetivo fue introducir a los ingresantes en el aprendizaje de la matemática superior, a través de un enfoque de resolución de problemas que habilitó sus capacidades de exploración, experimentación, argumentación y reflexión. Trabajamos desde una perspectiva constructivista de la enseñanza y el aprendizaje, sosteniendo que hacer matemática –en este nuevo siglo– se debe acercar al modo de trabajo del matemático, quien indaga, explora, ajusta hipótesis, se contesta lo que no sabe, y así avanza. La propuesta fue desarrollada desde una modalidad semipresencial, con la que buscamos reinterpretar los ritmos de la enseñanza y del aprendizaje a la luz de la influencia tecnológica y redimensionarlos para favorecer procesos críticos y colegiados de apropiación del conocimiento. El registro de las ideas con las que concebimos y construimos la propuesta, junto con lo percibido en el desarrollo de las prácticas pedagógicas, nos permitió una primera reconstrucción a posteriori, que constituyó un segundo plano de análisis, posibilitando nuevas construcciones conceptuales.This work exposes the design and implementation of a techno-pedagogical proposal, whose objective was to introduce the students to the learning of higher mathematics, through a problem-solving approach that enabled their exploration, experimentation, argumentation and reflection capabilities. We worked from a constructivist perspective of teaching and learning, arguing that doing mathematics –in this new century– must approach the mathematician's way of working, who investigates, explores, adjusts hypotheses, answers what he does not know, and thus progresses. The proposal was developed from a blended mode, with which we seek to reinterpret the rhythms of teaching and learning in the light of technological influence and resize them to favor critical and collective processes of appropriation of knowledge. The registration of the ideas with which we conceived and constructed the proposal, together with what was perceived in the development of pedagogical practices, allowed us to find an initial a posteriori reconstruction, which constituted a second plane of analysis, making possible new conceptual constructions.Facultad de Informátic

Technology as a means of teaching mathematical education: an experience with university inicial students

Este trabajo expone el diseño e implementación de una propuesta tecno-pedagógica, cuyo objetivo fue introducir a los ingresantes en el aprendizaje de la matemática superior, a través de un enfoque de resolución de problemas que habilitó sus capacidades de exploración, experimentación, argumentación y reflexión. Trabajamos desde una perspectiva constructivista de la enseñanza y el aprendizaje, sosteniendo que hacer matemática –en este nuevo siglo– se debe acercar al modo de trabajo del matemático, quien indaga, explora, ajusta hipótesis, se contesta lo que no sabe, y así avanza. La propuesta fue desarrollada desde una modalidad semipresencial, con la que buscamos reinterpretar los ritmos de la enseñanza y del aprendizaje a la luz de la influencia tecnológica y redimensionarlos para favorecer procesos críticos y colegiados de apropiación del conocimiento. El registro de las ideas con las que concebimos y construimos la propuesta, junto con lo percibido en el desarrollo de las prácticas pedagógicas, nos permitió una primera reconstrucción a posteriori, que constituyó un segundo plano de análisis, posibilitando nuevas construcciones conceptuales.This work exposes the design and implementation of a techno-pedagogical proposal, whose objective was to introduce the students to the learning of higher mathematics, through a problem-solving approach that enabled their exploration, experimentation, argumentation and reflection capabilities. We worked from a constructivist perspective of teaching and learning, arguing that doing mathematics –in this new century– must approach the mathematician's way of working, who investigates, explores, adjusts hypotheses, answers what he does not know, and thus progresses. The proposal was developed from a blended mode, with which we seek to reinterpret the rhythms of teaching and learning in the light of technological influence and resize them to favor critical and collective processes of appropriation of knowledge. The registration of the ideas with which we conceived and constructed the proposal, together with what was perceived in the development of pedagogical practices, allowed us to find an initial a posteriori reconstruction, which constituted a second plane of analysis, making possible new conceptual constructions.Facultad de Informátic

Macroscopic and microscopic maturity stages. living working document for small tuna species.

Maturity ogives are usually estimated using different methods, including macroscopical and microscopical maturity data. Differences in maturity ogives estimations are found for species and by area/stock. So those differences may be a consequence of the use of different methodological techniques (criteria) or due to different spawning tactics. Taking this into account is essential to guarantee that the maturity criteria for each species are consistent across the laboratories and countries involved in stock assessment. The objective of this document is to show a large amount of detailed photos (macro and microphotographs) of the different gonad stages of Auxis rochei, Sarda sarda and Euthynnus alletteratus, for females and males, which will be an enhancement to the descriptions of maturity stages given in the maturity tables

Variabilidade, Custo De Resposta E Extinção Em Humanos

Two experiments with elementary school childreninvestigated the variability found in extinction using a choice procedure.Variability was analyzed based on response cost, schedule ofreinforcement, and number of sessions in operant strengthening.Extinction and operant strengthening were analyzed as part of the sameprocess. It is suggested that the variables of past history whichinfluenced the response should be identified.RESUMO — Dois experimentos foram feitos com crianças de escolas de primeiro grau, usando-se um procedimento de escolha, para estudar a variabilidade encontrada em extinção. Variabilidade nestes estudos foi analisada com base no custo de respostas, esquema de reforço e número de sessões de exposição ao fortalecimento operante. Extinção e fortalecimento operante são analisados como partes de um mesmo processo. Sugere-se ainda que, ao invés de se afirmar que a variabilidade é causada pela "história passada", que sejam identificadas quais variáveis da história passada são as responsáveis por esta variabilidade

Hospital-acquired influenza infections detected by a surveillance system over six seasons, from 2010/2011 to 2015/2016

In addition to outbreaks of nosocomial influenza, sporadic nosocomial influenza infections also occur but are generally not reported in the literature. This study aimed to determine the epidemiologic characteristics of cases of nosocomial influenza compared with the remaining severe cases of severe influenza in acute hospitals in Catalonia (Spain) which were identified by surveillance. An observational case-case epidemiological study was carried out in patients aged ≥18 years from Catalan 12 hospitals between 2010 and 2016. For each laboratory-confirmed influenza case (nosocomial or not) we collected demographic, virological and clinical characteristics. We defined patients with nosocomial influenza as those admitted to a hospital for a reason other than acute respiratory infection in whom ILI symptoms developed ≥48 h after admission and influenza virus infection was confirmed using RT-PCR. Mixed-effects regression was used to estimate the crude and adjusted OR. One thousand seven hundred twenty-two hospitalized patients with severe laboratory-confirmed influenza virus infection were included: 96 (5.6%) were classified as nosocomial influenza and more frequently had > 14 days of hospital stay (42.7% vs. 27.7%, P <.001) and higher mortality (18.8% vs. 12.6%, P <.02). The variables associated with nosocomial influenza cases in acute-care hospital settings were chronic renal disease (aOR 2.44 95% CI 1.44-4.15) and immunodeficiency (aOR 1.79 95% CI 1.04-3.06). Nosocomial infections are a recurring problem associated with high rates of chronic diseases and death. These findings underline the need for adherence to infection control guidelines

Azithromycin to Prevent Pertussis in Household Contacts, Catalonia and Navarre, Spain, 2012-2013

We retrospectively assessed the effectiveness of azithromycin in preventing transmission of pertussis to a patient's household contacts. We also considered the duration between symptom onset in the primary patient and azithromycin administration. We categorized contacts into 4 groups: those treated within 21 days after illness onset in the primary patient. We studied 476 primary index patients and their 1,975 household contacts, of whom 4.5% were later identified as having pertussis. When contacts started chemoprophylaxis within 14 days after primary patient's symptom onset was less effective. We recommend that contacts of persons with pertussis begin chemoprophylaxis within <14 days after primary patient's symptom onset

Effects of Brazil's political crisis on the science needed for biodiversity conservation

The effects of Brazil’s political crisis on science funding necessary for biodiversity conservation are likely to be global. Brazil is not only the world’s most biodiverse nation, it is responsible for the greater part of the Amazon forest, which regulates the climate and provides rain to much of southern South America. Brazil was a world leader in satellite monitoring of land-use change, in-situ biodiversity monitoring, reduction in tropical-forest deforestation, protection of indigenous lands, and a model for other developing nations. Coordinated public responses will be necessary to prevent special-interest groups from using the political crisis to weaken science funding, environmental legislation and law enforcement. Keywords: Brazil, biodiversity, climate change, governance, fundin