The impact of goal orientation, self-reflection and personal characteristics on the acquisition of oral presentation skills

Although many educators help others to develop oral presentation skills, little research is available to direct the instructional design activities of these educators. In the present article an explorative study on university freshman is described, in which goal-setting, self-reflection, and several characteristics of the subjects during oral presentations were analysed. The research results emphasize the critical impact of motivational constructs, such as self-efficacy and goal orientation, next to the topic of the oral presentation on the acquisition of oral presentation skills

The differential impact of observational learning and practice-based learning on the development of oral presentation skills in higher education

The present study focuses on the design and evaluation of an innovative instructional approach to developing oral presentation skills. The intervention builds on the observational learning theoretical perspective. This perspective is contrasted with the traditional training and practice approach. Two sequencing approaches – learners starting with observational learning versus learners starting with practice opportunities only – were compared. It was hypothesised that learners starting with observational learning would outperform learners in the practice only condition. The results suggest a significant differential impact on development of oral presentation skills. This impact of the observational learning training approach is only found in a limited number of evaluation criteria. Results additionally suggest that students are highly motivated to learn this type of skill. Interaction effects between student characteristics and instructional interventions were not significant

Student response system and learning oral presentation skills

Feedback and assessment play an important role in teaching and learning of oral presentation skills. This study describes the implementation and evaluation of an innovative instruction that uses a Student Response System for peer assessment of oral presentations. A large number of oral presentations were assessed and students’ perceptions and learning progress concerning the particular instructional approach were investigated. Results show that the Student Response System was an effective way to produce feedback for presenters, assessors and educators. Results also revealed a very positive students’ attitude towards the instructional format. The learning effect concerning assessment was rather limited. Further research is needed to come to conclusive statements about the latter.proceedings paperstatus: publishe

Simulation of hydrodynamics and inhibitor consumption in electrometallurgical plants

Abstract No. 551info:eu-repo/semantics/publishe

Inhibitor behaviour simulation in copper electrorefining and zinc electrowinning

"Held at the 1987 Annual Meeting of American Institute of Chemical Engineers in New York, November 15-20."info:eu-repo/semantics/publishe

Inhibitor behaviour simulation in electrochemical cells

"Held at the 1987 Annual Meeting of American Institute of Chemical Engineers in New York, November 15-20."info:eu-repo/semantics/publishe

Influence of the electrocrystallization inhibitors during copper electrorefining: A new experimental approach

The influence of the copper electrocrystallization inhibitors (mainly thiourea, gelatin and chloride ions) is studied in a new fully automatic pilot plan. This paper describes the conception and the building of this plan. The new approach is to reproduce the experimental conditions observed in the industry with the three additives present simultaneously in the electrolyte and secondly to study the influence of a slight modification of the concentration of one inhibitor, the others being present in the electrolyte with their industrial nominal concentrations.info:eu-repo/semantics/publishe

Mise au point d’un dépôt de (Cr,Al)N par pulvérisation cathodique en vue d’applications en fonderie de l’aluminium

La formation d’intermétalliques entre l’aluminium fondu et l’acier constitue un des obstacles rencontrés lors du moulage de l’aluminium, avec le faïençage. A ce titre, de nombreux dépôts protecteurs ont été proposés dans la littérature, avec des résultats mitigés et, souvent, contradictoires. Dans cette étude, des dépôts de (Cr,Al)N ont été réalisés par pulvérisation cathodique magnétron. Leur tenue à l’aluminium fondu a été évaluée au moyen d’essais dynamiques d’immersion dans ce milieu. Ce travail traite des mécanismes de l’attaque de l’acier par l’aluminium en présence de ces couches, l’influence de la dilatation thermique du substrat sur leur intégrité et les améliorations qu’elles peuvent apporter dans le domaine de la fonderie. D’autre part, pour améliorer les propriétés tribomécaniques des nitrures, il est fréquent de les doper par des éléments métalliques, mais l’effet de cette opération sur la tenue en corrosion n’est pas connu. Cette étude aborde également cet aspect, par un dopage de (Cr,Al)N à l’yttrium et au zirconium.info:eu-repo/semantics/publishe