Recuerdos, expectativas y concepciones de los estudiantes para maestro sobre la geometría escolar

Numerosos trabajos de investigación han puesto de manifiesto la importancia de analizar las concepciones de los estudiantes para profesores sobre las matemáticas y sobre su enseñanza-aprendizaje durante su proceso de formación. Éstas aparecen y se desarrollan durante su etapa escolar y son estables y resistentes a los cambios. Como consecuencia de ello, asumimos que, para aprender a enseñar matemáticas, debemos considerar las exigencias que proceden de las propias concepciones y conocimientos sobre la matemática escolar. Partiendo de esta premisa hemos desarrollado una investigación con el objetivo de describir y analizar las concepciones sobre la geometría escolar y su enseñanza-aprendizaje de los estudiantes para maestro. Para ello hemos considerado la hipótesis de que los recuerdos y las expectativas de los estudiantes nos dan información para caracterizar sus concepciones en el campo de la geometría y su enseñanza-aprendizaje en primaria.Several studies have shown the importance of prospective teachers' conceptions about mathematics and its teaching-learning during their educational process. They indicate that to learn to teach mathematics we must take into account the demands that originate from our own conceptions of school-level mathematics, since these are stable and resistant to change. On the basis of this idea, we have developed a study aimed at describing and analysing prospective primary teachers' conceptions about school-level geometry and its teaching-learning. To this end, we considered the hypothesis that the students' memories and expectations provide information with which to characterize prospective primary teachers' conceptions in the field of geometry and its teaching-learning at primary school level

Ambivalencia e incertidumbre en las relaciones entre ciencia y sociedad

Las relaciones entre ciencia y sociedad han pasado por diversos momentos a lo largo de la historia. En la actualidad, dichas relaciones están marcadas por la ambivalencia y la incertidumbre, las cuales generan diferentes desajustes en y entre ambas esferas. De un lado, el avance de la esfera tecno-científica, de otro, el desfase y la percepción de amenaza que sufre la sociedad respecto a tal desarrollo. Tales acontecimientos están poniendo de manifiesto la necesidad de replantear tales relaciones de acuerdo con parámetros que traten de poner en mayor contacto ambas orillas de un mismo mundo.The science-society relationship has gone by several circumstances along the history. At the present, their relationship is marked by the ambivalence and the uncertainty that it generates diverse upsets into and among both spheres. The advance of the techno-scientific sphere and the difference and the threat perception that society suffers with reference to scientific and technological development suppose that it is necessary to restate such relationship in accordance with frameworks that try to put in more contact both sides of oneself world

Effect of the axial jet on the optimal response in Batchelor vortex

En este póster se estudia la respuesta óptima del torbellino de Batchelor para distintos números de onda. Se demuestra que incluso teniendo la velocidad axial, un torbellino es capaz de tener grandes amplificaciones de energía.Universidad de Málaga. Campus de Excelencia Internacional Andalucía Tech

Wingtip vortex in a NACA0012 airfoil and its active control

Contribución mediante sesión pósterWe conduct experiments in a towing-tank to analyse the flow patterns of wingtip vortices in a NACA 0012 airfoil. In this experimental research, we provide PIV measurements and flow visualisations. Without active control, several parameters are given experimentally as function of the Reynolds number, so we compare these data with the theoretical models of Batchelor, and Moore and Saffman together with DNS. Secondly, we analyse the effect of a continuous injection in the spanwise direction. The continuous jet has a strong influence on the wing-tip vortex formation. We explore this effect at low chord based Reynolds number ranging from 7000 up to 20000. We change the aspect ratio of the injection, R, defined as the ratio of the velocities between the jet (Uj) and free-stream (U). For R=1, we find that the jet strongly affects the wingtip vortex formation with a sudden decrement of the axial vorticity and the azimuthal velocity. This technique is a challenge and a promising tool to reduce the intensity of the vortex core.Universidad de Málaga. Campus de Excelencia Internacional Andalucía Tech

Hands-on Physics Experiments for Classroom

Hands-on Physics Experiments for Classroominfo:eu-repo/semantics/publishedVersio

Resultados a largo plazo del tratamiento de las fracturas de rótula mediante hemipatelectomia

Han sido revisadas retrospectivamente 48 fracturas de rótula tratadas mediante hemipatelectomía, con un seguimiento medio de 14,6 años. Para la valoración se han seguido criterios clínicos, radiológicos, subjetivos y de potencia del aparato extensor. El rango de movilidad de la extremidad intervenida es del 89%, la potencia del aparato extensor de 83% y la medición de la circunferencia del muslo del 97%, tomando como referencia la extremidad no intervenida. Encontramos un 45% de resultados excelentes, 39,58% de buenos resultados, 10,41% de resultados regulares y 4,16% de malos resultados. Existe una relación estadísticamente significativa entre el tipo de fractura, la edad de los pacientes, la existencia de patología previa en la rodilla, las lesiones asociadas a la fractura rotuliana por el traumatismo y el resultado final obtenido. A la vista de estos resultados podemos concluir que la hemipatelectomía es una técnica eficaz y segura para el tratamiento de algunos tipos de fracturas de rótula.A retrospective stydy was made of 48 patellar fractures who were threated with a hemipatellectomy. The mean time of follow-up was 14,6 years. The results were assessed with use of clinical, radiological, subjective and isokinetic quadriceps strength-testing criteria. The mean active range of motion was 89%, the strength of quadriceps was 83% and the circumference of the thigh was 97% of these measurements in the contralateral extremity. The over-all results was rated as excellent in 45,83%, dood in 39,58%, fair in 10,41% and poor in 4,16%. There was a significant statistical correlation between the type of fracture, the previous patology in the knee, the associated lesions caused by trauma and the outcome. The results of this study indicate that hemipatellectomy can be an effective and secure treatment for selected patellar fractures

Estudio prospectivo de profilaxis ambulatoria con sulodexida después de una artroplastia total de cadera o rodilla

La falta de continuidad en el tratamiento profiláctico ambulatorio se muestra como una de las causas determinantes en la aparición de complicaciones tromboembólicas en el primer mes tras el alta hospitalaria. La dificultad de administración por parte del paciente de las heparinas de bajo peso molecular y la diferencia de preocupación entre los médicos de Atención Primaria y los Servicios especializados por el problema tromboembólico son algunas de las causas de esta discontinuidad. Se realiza un estudio prospectivo sobre 221 pacientes intervenidos de prótesis total de cadera y rodilla con la finalidad de estudiar los resultados obtenidos con el tratamiento profiláctico mediante Sulodexida, un fármaco que une a sus propiedades antitrombóticas la comodidad de la administración vía oral. Se encontró una respuesta satisfactoria sin aparición de complicaciones tromboembólicas en el 98,8% del grupo que completó el tratamiento (n=164), frente al 21% de complicaciones que presentó el grupo que no completó el estudio.The discontinous thromboprophylaxis is a determinant cause in the presence of thromboembolic complications in the first month after hospital discharge. The difficult administration of the low -molecular- weight heparin by the patient and the different preoccupation for this problem between the Primary Care and the orthopedics specialists are the causes that incite to discontinous thromboprophylaxis. A prospective study was made of 221 patients who undergoing a total hip arthroplasty or a total knee arthroplasty and the objective was to investigate the incidence of venous thrombosis in the patients who were treated with oral sulodexide in the first month after hospital discharge. We analized the efficacy and the secondary effects of sulodexide. There were satisfactory results in 98,8% of patients who were treated with sulodexide (1,2% of venous complications), and 21% of venous complications in the group of patients who did not continue the thromboprophylactic treatment

Multidrug Efflux Pumps at the Crossroad between Antibiotic Resistance and Bacterial Virulence

Multidrug efflux pumps can be involved in bacterial resistance to antibiotics at different levels. Some efflux pumps are constitutively expressed at low levels and contribute to intrinsic resistance. In addition, their overexpression may allow higher levels of resistance. This overexpression can be transient, in the presence of an effector (phenotypic resistance), or constitutive when mutants in the regulatory elements of the expression of efflux pumps are selected (acquired resistance). Efflux pumps are present in all cells, from human to bacteria and are highly conserved, which indicates that they are ancient elements in the evolution of different organisms. Consequently, it has been suggested that, besides antibiotic resistance, bacterial multidrug efflux pumps would likely contribute to other relevant processes of the microbial physiology. In the current article, we discuss some specific examples of the role that efflux pumps may have in the bacterial virulence of animals’ and plants’ pathogens, including the processes of intercellular communication. Based in these evidences, we propose that efflux pumps are at the crossroad between resistance and virulence of bacterial pathogens. Consequently, the comprehensive study of multidrug efflux pumps requires addressing these functions, which are of relevance for the bacterial–host interactions during infection.Work in our laboratory is supported by grants from the Spanish Ministry of Economy and Competitiveness (BIO2014-54507-R and JPI Water StARE JPIW2013-089-C02-01); from Madrid Autonomous Community [S2010/BMD2414 (PROMPT)]; and from the Instituto de Salud Carlos III [Spanish Network for Research on Infectious Diseases (REIPI RD12/0015)]. MA-R and PB are recipients of FPI fellowships from MINECO.Peer reviewedPeer Reviewe

Caracterização das concepções dos professores em formação sobre ensino-aprendizagem da geometria

Numerosos trabalhos de investigação puseram em evidência a importância de analisar as concepções dos estudantes para professores sobre a Matemática e sobre o seu ensino/aprendizagem durante o seu processo de formação. Estas aparecem e desenvolvem-se durante a sua etapa escolar e são estáveis e resistentes à mudança. Como consequência disto, entendemos que para aprender a ensinar Matemática devemos considerar as exigências que procedem das próprias concepções e conhecimentos sobre a Matemática escolar. Partindo desta premissa desenvolvemos uma investigação com o objectivo de descrever e analisar as concepções dos estudantes primários sobre a Geometria escolar e seu ensino/aprendizagem. Para isso considerámos a hipótese de que as recordações e as expectativas dos estudantes nos dão informação para caracterizar as suas concepções no campo da Geometria e o seu ensino/aprendizagem no Ensino Primário