Search results for " Experimental"

El fracaso en la resolución de problemas de Física : una investigación orientada por nuevos supuestos

1988

Resumen basado en el de la publicación Resumen en inglés Se muestra un intento de cuestionar la forma habitual de enseñar la resolución de problemas y elaborar estrategias más efectivas teóricamente basadas en las propuestas. Se incluyen algunos resultados de las aplicaciones de nuevas orientaciones. ESP

Preguntas de los estudiantes sobre dispositivos experimentales en distintas situaciones didácticas: génesis y tipología

2013

Todo nuevo conocimiento comienza con “una buena pregunta”. Formular preguntas es una competencia científica y es conveniente desarrollarla durante la instrucción. A pesar de la importancia aceptada de saber formular preguntas, y del impacto que ello tiene en el éxito académico (Rosenshine, Meister y Chapman, 1996), en las clases usuales de ciencias esta competencia no se desarrolla de forma adecuada, como mostró el estudio de Dillon (1988; Chinn y Malhotra, 2002). El objetivo principal de esta tesis es estimular la generación de preguntas destinadas a obtener información en estudiantes de ciencias de diferentes niveles educativos. Además, se clasifican dichas preguntas y se asocian con meca…

Sport arbitration as an emergent process in a complex system: Decision-making variability is a marker of expertise in national-level football referees

2020

This study examined the experiential knowledge of eight Australian national-level football referees (3.2 yrs mean national-level experience) about the notion of consistent decision-making during competitive matches. Using a grounded theory approach, the analysis revealed that participants view “consistency” as context-dependent, rather than a rigid process of uniformly responding to isolated foul-play transgressions with putatively correct responses. Our results present two key conceptual abstractions—”referential and game dependent” and “purpose and context”—as a framework for understanding referee decision-making consistency. Results evidence that in higher level referees, consistent deci…

Convolutional Neural Network-Based Human Movement Recognition Algorithm in Sports Analysis

2021

In order to analyse the sports psychology of athletes and to identify the psychology of athletes in their movements, a human action recognition (HAR) algorithm has been designed in this study. First, a HAR model is established based on the convolutional neural network (CNN) to classify the current action state by analysing the action information of a task in the collected videos. Secondly, the psychology of basketball players displaying fake actions during the offensive and defensive process is investigated by combining with related sports psychological theories. Then, the psychology of athletes is also analysed through the collected videos, so as to predict the next response action of the …

Undergraduate students’ strategies for negotiating emerging performer and teacher identities

2017

Nowadays, instrumental undergraduate students must often negotiate their emerging performer and teacher identities, and the results of this process affect the way they later balance their professional and personal life and their ability to sustain lifelong involvement in music. Drawing from recent sociological studies on bicultural identity integration, this study addresses two research questions: What strategies do undergraduate students adopt for negotiating both professional identities? And what are the characteristics of each strategy?One hundred and twenty-one undergraduate performance students participated in this study. Using cluster analysis, a typology of eight strategies for negot…

2020

Critical reasoning (CR) when confronted with contradictory information from multiple sources is a crucial ability in a knowledge-based society and digital world. Using information without critically reflecting on the content and its quality may lead to the acceptance of information based on unwarranted claims. Previous personal beliefs are assumed to play a decisive role when it comes to critically differentiating between assertions and claims and warranted knowledge and facts. The role of generic epistemic beliefs on critical stance and attitude in reflectively dealing with information is well researched. Relatively few studies have been conducted on the influence of domain-specific belief…

How Can Steering Committees Manage Change Through Dynamic Capabilities to Increase System Satisfaction?

2017

Spanish validation of the PICCOLO (Parenting Interactions With Children: Checklist of Observations Linked to Outcomes)

2019

Background/Objective: The aim of this study was to explore the psychometric properties of the Spanish version of the Parenting Interactions with Children: Checklist of Observations Linked to Outcomes (PICCOLO; Roggman et al., 2013a). This observational measure is composed of 29 items that assess the quality of four domains of parenting interactions that promote child development: affection, responsiveness, encouragement, and teaching. Methods: The sample included 203 mother-child dyads who had been video-recorded playing together. Fifty-six percent of the children were male, and 44% were female, aged from 10 to 47 months. Video-recorded observations were rated using PICCOLO items. Results: …

Pro-inflammatory T helper 17 directly harms oligodendrocytes in neuroinflammation.

2021

Significance Multiple sclerosis (MS) is a neuroinflammatory, demyelinating disease that represents one of the most frequent causes of irreversible disability in young adults. Treatment options to halt disability are limited. We discovered that T helper (Th)17 cells in contact with oligodendrocytes produce higher levels of glutamate and induce significantly greater oligodendrocyte damage than their Th2 counterpart. Blockade of CD29, which is linked to glutamate release pathways and expressed in high levels on Th17 cells, preserved human oligodendrocyte processes from Th17-mediated injury. Our data thus provide evidence for the direct and deleterious attack of Th17 cells on the myelin compart…

Hepatocyte-specific deletion of the antiapoptotic protein myeloid cell leukemia-1 triggers proliferation and hepatocarcinogenesis in mice

2010

Regulation of hepatocellular apoptosis is crucial for liver homeostasis. Increased sensitivity of hepatocytes toward apoptosis results in chronic liver injury, whereas apoptosis resistance is linked to hepatocarcinogenesis and nonresponsiveness to therapy-induced cell death. Recently, we have demonstrated an essential role of the antiapoptotic Bcl-2 family member Myeloid cell leukemia-1 (Mcl-1) in hepatocyte survival. In mice lacking Mcl-1 specifically in hepatocytes (Mcl-1Δhep), spontaneous apoptosis caused severe liver damage. Here, we demonstrate that chronically increased apoptosis of hepatocytes coincides with strong hepatocyte proliferation resulting in hepatocellular carcinoma (HCC).…