Perspective (représentation) | EPFL Graph Search

vignette|Effet de perspective dans Ulysse remet Chryséis à son père du Lorrain, vers 1644. La perspective est l'ensemble des techniques picturales destinées à représenter les trois dimensions d'un objet ou d'une scène par une sur une surface plane. Les techniques de perspective utilisent certains des indices qui fondent la perception de la profondeur. L'enseignement la décompose en perspective linéaire, technique du dessin et de la géométrie des contours, et en perspective aérienne, technique picturale qui s'intéresse au rendu des objets lointains. Le terme « raccourci » désigne l'application de la perspective à la figure humaine et aux animaux. La plupart des méthodes s'appliquent à une portion finie de surface plane, feuille, tableau ou écran. La complexité des procédés de représentation de la profondeur sur une surface sans épaisseur dépend des suppositions de départ de la construction. Les plus simples, comme la perspective cavalière, présentent un résumé des vues en plan et

Les étudiants, l'université de masse et la ville durable

Ismail Haddad

In a globalized space where mobility is growing, the capacities of attraction of the city are becoming increasingly decisive. Between the cities, through its attractive quality and attraction capacity, the university will become a decisive factor of location activity. The contribution of the capacity of city culture, development of meeting places is fantastic. Universities cannot live permanently on their side, next to the city. However, for too long, the city and the university in Tunisia have developed in ignorance of each other. Universities, since they have existed, admit with difficulties contingencies of civil societies. Governments are wary of students and teachers. This latent divorce materialized especially through the creation of campus, away from city centers in the functionality and the monotony of isolation. The urban university countdown is now universally condemned. Addressing universities as major facilities for both generating modern middle classes and meet the needs of these classes is probably a new perspective in the architectural and urban studies in Tunisia. Investigate the essence of the university and its space, understand, give it a face, it takes to trace the sources of the university, the genesis of the position in relation to our time, in any its specificity, to lay a few landmarks able to give an account for the complexity of its course. Why, how, by whom and under what conditions taking shape at a given time an edifice (the university) from a social vocation? What general needs and specific answers? In short, what is the territorial space that University now covers? In this sense, the systemic approach presents an additional interest because it proposes to connect into a single and same application dimensions of reality that are sometimes addressed separately by different disciplines and different actors, professional town planning, culture, life student or teaching. Indeed, we have chosen to begin this research by presenting a sample of general policies of academic development in an international perspective. In a second stage, we will continue research on the same theme, but by focusing it on Tunisia. In this context, we will consider the current inadequacy between the university and the changing needs of society. In the third part, we will study the spatial impact and synergy between the university and the economic environment. This theme is central to the debate on the complex interactions of urban dynamics and local development. We will conclude by reviewing the first two parts in the light of the results of the third. Furthermore, this research involved a provision of knowledge, which is able to provide solid foundations for working professionals in architecture and urban, social scientists, lawyers, economists and current officials in charge to define strategies and projects of agglomeration.

EPFL2009

Expect the Unexpected

Georgeta Geambasu

This study originates from the recognition that project management research is replete with normative theories on what need projects to be successful. However, it has performed worse with respect to assisting the understanding of how and why similar projects do not have similar performances during their life-cycles. It claims that the poor performance of major infrastructure projects, acknowledged by cost overruns and scheduling delays, is due to their lack of resilience when confronted with critical events that are inherent in their life-cycle. Therefore, it addresses the overarching question: How do projects cope with the critical events that occur at some point in their life-cycle? And why and how are some troubled projects able to maintain positive adjustments (cope successfully) while others cannot? By addressing these questions, the first goal of this study is to reveal the "resilience enablers". These are factors and conditions enabling the successful coping process (maintaining performance after the critical event) in projects confronted with unexpected events. The second goal is to translate the new knowledge of "resilience enablers" into recommendations for practitioners to enable them to actually make use of the insight into a troubled project's behavior. To study these questions, a qualitative research design was developed. It is articulated on the exploratory case study of one of the most important infrastructure project of this century. The result consists of two sets of findings, both relate to the critical events' managements and the factors and conditions that enabled the project's resilience. This thesis contributes to project management research with a middle range theory. The project performance can be seen and explained from a new and original perspective of project resilience. It also contributes to the project's management practice with recommendations aiming to help project actors to 1) identify and assess the resilience of their project organization, along with the identification and management of the risks. And to 2) maintain project system performance after the critical event through continuous adoption of risk-focused, and protection-focused strategies, which imply uncostly measures that enable project resilience.

EPFL2011

Les étudiants, l'université de masse et la ville durable

Ismail Haddad

EPFL2009

Expect the Unexpected

Georgeta Geambasu

EPFL2011