Search results for "mental model"
showing 9 items of 89 documents
Effect of ischemic postconditioning on microvascular obstruction in reperfused myocardial infarction. Results of a randomized study in patients and o…
2014
Background: Ischemic postconditioning (PCON) appears as a potentially beneficial tool in ST-segment elevation myocardial infarction (STEMI). We evaluated the effect of PCON on microvascular obstruction (MVO) in STEMI patients and in an experimental swine model. Methods: A prospective randomized study in patients and an experimental study in swine were carried out in two university hospitals in Spain. 101 consecutive STEMI patients were randomized to undergo primary angio-plasty followed by PCON or primary angioplasty alone (non-PCON). Using late gadolinium enhancement cardiovascular magnetic resonance, infarct size and MVO were quantified (% of left ventricular mass). In swine, using an ang…
Comparison of adjuvant and adjuvant-free murine experimental asthma models
2009
Introduction The most widely used protocol for the induction of experimental allergic airway inflammation in mice involves sensitization by intraperitoneal (i.p.) injections of the antigen ovalbumin (OVA) used in conjunction with the adjuvant aluminium hydroxide (alum). Although adjuvants are frequently used, there are questions regarding the necessity of alum for murine asthma studies due to the non-physiological nature of this chemical. Objective The objective of this study was to compare experimental asthma phenotypes between adjuvant and adjuvant-free protocols of murine allergic airway inflammation in an attempt to develop a standardized alternative to adjuvant use. Method An adjuvant-…
Asiantuntijat uusien toimintamallien oppijoina
2003
Työ muuttuu ja sitä kautta myös työssä tarvittavien toimintatapojen pitäisi muuttua. Ajattelumallien tai toimintatapojen muuttaminen ei ole aina helppoa, sillä käytössä olevat mallit rutinoituvat nopeasti. Ihmisillä ei ole kykyä, halua tai aikaa tarkastella omaa työtään uusien silmälasien läpi, arvioida tapojensa toimivuutta tai jopa kokonaan kyseenalaistaa niiden järkevyyttä. Mielenkiintoisen ratkaisun etsiä uusia toimintamalleja ennakkoluulottomasti edustaa seuraava esimerkki Englannista. – Artikkelissa kuvataan brittiläisessä sairaalassa toteutettua kehittämisprosessia, jossa lääkärien visuaalisen hahmottamisen apuna on käytetty taiteilijoita.
Describir y dibujar en ciencias. La importancia del dibujo en las representaciones mentales del alumnado
2015
El presente trabajo pretende valorar los resultados obtenidos mediante la utilización del dibujo y de las descripciones a lo largo de una actividad basada en la observación de la morfología de las hormigas. Se plantea un trabajo individual y autónomo donde los participantes, en 3 etapas diferentes, deben tratar de dibujar o describir su observación de muestras vivas de hormigas. Los resultados de la investigación son muy significativos, puesto que encontramos diferencias estadísticas entre la utilización de las dos estrategias, así como entre las producciones de cada etapa, pudiendo ver cómo evolucionan sus representaciones mentales. Evidenciamos, de esta manera, que la estrategia de dibuja…
Towards a learning community: understanding teachers’ mental models to support their professional development and learning
2021
Amidst societal, demographic and educational changes, teachers are expected to engage in professional development and learning (PDL) throughout their careers. This study explores school teachers’ mental models about their work in the framework of Senge’s learning organisation, aiming to support their PDL during curriculum reform and organisational changes. The study’s data comprise 41 semi-structured interviews with each teacher in one school community. These interviews were analysed using qualitative, data-driven yet theory-informed content analysis. In the first analysis phase, fragments of mental models concerning teachers’ work and their school community were explored. These fragments i…
ELECTRICAL DISCHARGE MACHINING - A HIGH FUTURE NONCONVENTIONAL PROCESSING PROCESS
2021
Electrical discharge machining is one of the most common processes for processing metallic materials. This process is characterized by the lack of mechanical pressure on the object that ensures the macroscopic location of the erosive agent. This scientific paper highlights a study based on experimental data processing as well as modeling the most important technological parameters for dimensional processing by electrical discharge machining with and without magnetic activation. In this context, the modeling and optimization of process parameters is approached, which can lead to the quality increasing of the processed surface, to an increase of the processing productivity and to a reduction …
Understanding teachers’ mental models of collaboration to enhance the learning community
2022
This study examined representations of Finnish basic education teachers’ mental models of collaboration to reveal the background features that enable or hinder changes in a school community and teacher collaboration. In this case study, we explored 41 teachers’ mental models of collaboration in a one-school community to identify and understand the features that enhance or challenge collaboration. The findings raise the question of how collaboration can support a school’s transition to a unified comprehensive school, when teachers are accustomed to working alone with a strong sense of autonomy and diverse mental models of collaboration. The findings revealed that collaboration is mainly limi…
Nouvelles technologies et aide à la compréhension de documents techniques : Construction et expérimentation d'un simulateur de fonctionnement de grue…
2001
Reading skills are more and more required to succeed professional examination. French crane drivers are concerned with this problem. In order to help them, we have conducted a study with three main steps. First, we carried out a cognitive work analysis. Second, we test several analogical modalities of written presentations focusing on the construction of a specific simulator. Finally, two experiments are presented showing a significative effect of this simulator on the comprehension of cranes technical documentation.