Search results for "FLEX"
showing 10 items of 1677 documents
Role of extension and compression in the evolution of the eastem margin of Iberia: the ESCI- València Trough seismic profile
1994
Carlos.Santisteban@uv.es The ESCI-València Trough deep seismic reflection profile crosses the eastern margin of Iberia and can be divided into three regions according to crustal structure. From NW to SE they are: a) the Ebro Basin, whit a 33 km thick continental crust wich remained almost undeformed during the Cenozoic and is very reflective in its lower part; b) the Continental Margin, made up of the Catalan-Valencian Domain and the Balearic Promontory with a thin (12 to 30 km thick) continental crust wich was deformed during the Cenozoic, extensional structures predominating the first domain and contractional structures in the second; and c) the Algerian Basin, with a 9 km thick oceanic c…
Hand verification for flexural strength of existing R.C. floors subject to degradation phenomena
2015
Abstract In the present paper, a simplified model for hand verification of the flexural and shear strength of existing corroded T beams cast in place of lightened R.C. orthotropic slabs forming floors is presented and discussed. Diffused and pitting corrosion on steel bars, compressive concrete strength degradation and concrete bond strength degradation are included in the model. The original contribution of the paper is evaluation of the flexural and shear strength considering both the cases of strain compatibility and absence of compatibility and considering the main parameters governing the corrosion process. An arch-resistant model for the calculus of the flexural and shear strength of …
Design procedure for prestressed concrete beams
2014
Abstract. The theoretical basis and the main results of a design procedure, which attempts to provide the optimal layout of ordinary reinforcement in prestressed concrete beams, subjected to bending moment and shear force are presented. The difficulties encountered in simulating the actual behaviour of prestressed concrete beam in presence of coupled forces bending moment - shear force are discussed; particular emphasis is put on plastic models and stress fields approaches. A unified model for reinforced and prestressed concrete beams under axial force - bending moment - shear force interaction is provided. This analytical model is validated against both experimental results collected in li…
La “uberización” de los centros escolares: reorganización del trabajo pedagógico mediante las plataformas digitales de contenidos
2018
El presente trabajo se inscribe en el marco de un proyecto de investigación de I+D que estudia los cambios producidos en los centros de Primaria por la progresiva sustitución de los libros de texto por los materiales digitales. Uno de esos cambios observados es que los materiales digitales se hacen operativos mediante plataformas digitales que, además, se hacen extensibles a otras muchas tareas de centro. A partir de esta constatación nos ocupamos aquí del estudio de la 'uberización' o reestructuración organizativa del trabajo en los centros que operan con estas plataformas. Para alcanzar tal objetivo hemos recurrido a una metodología de corte cualitativo, tanto para el análisis de la prese…
Altered processing of sensory stimuli in patients with migraine.
2014
Migraine is a cyclic disorder, in which functional and morphological brain changes fluctuate over time, culminating periodically in an attack. In the migrainous brain, temporal processing of external stimuli and sequential recruitment of neuronal networks are often dysfunctional. These changes reflect complex CNS dysfunction patterns. Assessment of multimodal evoked potentials and nociceptive reflex responses can reveal altered patterns of the brain's electrophysiological activity, thereby aiding our understanding of the pathophysiology of migraine. In this Review, we summarize the most important findings on temporal processing of evoked and reflex responses in migraine. Considering these d…
Creatividad en alumnos de talento matemático
2019
En el presente trabajo hacemos un estudio exploratorio en el que pretendemos medir la creatividad en relación con el talento matemático, basándonos en los trabajos de Roza Leikin (con su permiso). Seleccionamos dos muestras de alumnos, una formada por estudiantes de entre 15 y 17 años participantes en el programa ESTALMAT (dirigido a estudiantes con talento matemático), y la otra formada por alumnos del máster, con una sólida formación matemática. A cada participante, le pasamos un test con 4 problemas de matemáticas que son tareas de resolución múltiple, y les pedimos que den tantas soluciones como puedan de cada uno en un cierto límite de tiempo. Después, analizamos los resultados, tanto …
Fazer pós-graduação em educação em ciências melhora o ensino?
2018
espanolEn este articulo se indaga como influye el transito por dos maestrias en educacion en ciencias y tecnologia de Cordoba y La Plata (Argentina) en el desempenode docentes cursantes a las mismas. Nuestra hipotesis fue que dicho transito debia mejorar sus practicas y sus habilidades de investigacion. Para tal fin se hicieron preguntas a estos docentes, relacionadas con sus practicas y con los cambios que pueden haber sido promovidos por dichos estudios de posgrado. Ello se complemento con observaciones a sus clases. Los resultados muestran que la maestria genero modificaciones en la practica docente, que desarrollo o perfecciono sus habilidades de investigacion educativa y que la partici…
Introducing Dialogic Teaching to Science Student Teachers
2011
It is commonly believed that science teachers rely on language that allows only minor flexibility when it comes to taking into account contrasting views and pupil thoughts. Too frequently science teachers either pose questions that target predefined answers or simply lecture through lessons, a major concern from a sociocultural perspective. This study reports the experiences of science student teachers when introduced to the Communicative Approach to science education drawing on dialogic teacher-talk in addition to authoritative teacher-talk. This approach was introduced to the students in an interventional teaching program running parallel to the student teachers’ field practice. The pract…
The influence of age-based faultlines on team performance: Examining mediational paths
2021
Abstract In a sample of 60 branches of a bank, we examine the influence of age-based faultlines on team performance. Specifically, we propose a model with four mediational paths in the age-based faultline-team performance link. Using a time-lagged design with three data-collection points, we found that task conflict, team reflexivity, and negative team mood mediated the negative relationship between age-based faultline strength and team performance. The results reveal the value of examining different mediational paths to explain the negative impact of teams’ demographic faultlines on team performance, and the need to integrate both task-related and affective aspects of team work in order to…
Demand Response Service Certification and Customer Baseline Evaluation Using Blockchain Technology
2020
The use of Distributed Ledger Technologies such as Blockchain for certifying Demand Response services allows for the creation of a distributed system in which customers can communicate with the system operator to provide their flexibility, in a secure, transparent and traceable way. Blockchain technology also supports incentive mechanisms for users taking part in the service through the generation of utility tokens to recognize the user's contribution. This paper presents the experimental test of a novel methodology for Demand Response programs implementation by using the Blockchain technology. The latter is employed for defining a distributed Demand Response service and a new system for it…