Une histoire de résidus : à propos des facteurs généraux et locaux de croissance régionale au Canada,de 1971 à 2001

Starting from an econometric model of local employment growth, applied to Canada (1971–2001), residuals—relative to model predictions—are analyzed over time and over space, in turn allowing us to draw a distinction between general explanatory variables and factors of a more local, cyclical or accidental nature. The model's explanatory power grows over time, founded on variables such as urban size, market access and industrial structure, allowing us to conclude that local employment growth in Canada follows an increasingly geographically predictable pattern. However, an examination of the residuals reveals more localized processes. Growth volatility is most manifest in Alberta and British Columbia, home to the most erratic local economies. Emerging patterns are visible in the last period, most notably the underperformance of Northern Ontario and of non‐metropolitan communities between Windsor and Québec City, lying along the Great Lakes and the Saint Lawrence. The over‐performance—compared to model predictions — of small and mid‐sized towns in south‐eastern Québec can, on the other hand, be interpreted as a sign of truly local social processes, generally associated with a particularly dynamic local entrepreneurial class.     

La représentation de l’espace public par la photographie : Une étude de cas dans la région de Montréal (Québec,Canada)

Beyond the material forms that constitute public space, it is subject to representations or images that shape the types of use, forms of appropriation, and general perception that people have of it. Following a centre‐periphery gradient that allows us to compare three zones of the Montreal region (pericentral, periurban, and the northern ring), we analyzed photographs available within cyberspace (from different municipalities and boroughs, local newspapers, and social media) to draw out representations of public space. What can photographs available online tell us about how space is perceived? We have established a typology of images of public space (idyllic nature, urban scene, festive space, empty space, family portrait) that are representative of the overall corpus studied. We have compared these results with a correspondence analysis to clarify the structure of interaction between the variables. The analysis demonstrates that the representations are more differentiated between neighbourhoods than between regions, and that while newspapers and municipalities represent more themes of sociability and family life, social media shows more empty spaces, whether they be monumental spaces, or spaces of daily life.     

L’émergence de la grappe industrielle de l'intelligence artificielle (IA) à Montréal

The paper analyses the emergence of the Artificial Intelligence (AI) cluster in Montreal and investigates two questions: (1) What are the different theoretical interpretations related to the emergence of industrial cluster? And (2) What are the factors underlying the emergence of the AI cluster in Montreal and to what extent have local and global factors been decisive in this respect? The AI cluster emerges through a process that brings into play the interaction between the local initial conditions and the birth of a new industry. Moreover, it also involves an interaction between the local and the global, which is supported by interactions with foreign actors located in different parts of the world.     

La théorie des éléments de Christophorus Clavius et l'idée du globe terraqué

Christophorus Clavius' Theory of the Elements and the Idea of the Terraqueous Globe. The need to reconcile Aristotle's theory of elementary spheres with the evidence of earth above sea level – the so‐called ‘terra firma’ – induced an important conceptual shift. As a consequence anti‐Aristotelian arguments were brought to the fore in order to be incorporated into the very same Aristotelian tradition. The German Jesuit Christophorus Clavius played a momentous role in this process. He introduced the idea of the terraqueous globe into the Scholastic cosmology, modifying the logical frame of Aristotelian physics. The present work analyses Clavius' theory as well as the procedures he considers to reach his purpose. He used a combinatorial approach to study the relations occurring between the four elements – earth, water, air and fire – and analysed their relations from a physical perspective, proposing a possible structure of the sublunary world.     

Variabilité et fréquence des cycles de gel‐dégel dans la région de Québec, 1977–2006

Freeze‐thaw cycles are most common at the beginning or near the end of the winter season. These cycles have various effects on the ecosystems of Eastern Canada, affecting both biotic and abiotic components of temperate cold environments. Using air temperature minima and maxima from four meteorological stations close to Québec City, we determined the frequency of daily freeze‐thaw cycles for the last 30 years. The results show no significant increase in the number of freeze‐thaw cycles despite a small increase in air temperature. Polynomial curves describing the relationship between mean air temperatures and the number of freeze‐thaw cycles were calculated. Based on these equations and anticipating a climate change scenario, we projected future freeze‐thaw cycles. Assuming a 5 °C increase in mean air temperatures by 2100, we estimated that the number of days with a freeze‐thaw cycle could increase by approximately 20 days per winter. The increase in the number of such cycles will be concentrated during the coldest months of the winter (January and February).     

L'identification des zones calmes et un diagnostic d’équité environnementale à Montréal

Quiet urban areas are places with low noise levels that can help people to support physical and mental wellness. This paper has two objectives: to identify quiet urban areas in Montreal and to check for the presence of environmental inequities in access to such areas for vulnerable groups (children, older people, low‐income individuals, and visible minorities). Using a GIS‐based methodology, 2,282 quiet urban areas were identified in Montreal. The results of a mixed effects logistic regression model analysis showed that there are no major inequities in access to quiet urban areas for the population groups studied. The analysis did, however, revealed substantial spatial disparities in terms of the distribution of quiet urban areas across the boroughs and municipalities examined.     

Emprise et déprise de l'agriculture sur le territoire de l'est de l'Ontario de 1826 à 2006: la dimension environnementale

Agricultural land‐cover changes in Eastern Ontario from 1826 to 2006: environmental effects. Stormont, Dundas and Glengarry (SDG) counties, Eastern Ontario, are among the first areas in Ontario to welcome settlers. In 1784, they established themselves in a forested land where wetlands are very important. Today, a large part of the wetlands has disappeared, but the landscape is wooded, masking the radical changes that took place over the course of the last two centuries. Analysis of census data from 1826 to 2006 allows the reconstruction of the history of land‐cover changes. It reveals the nature and rates of change for which a first analysis is presented. Four periods are identified. First, agriculture conquers the land and establishes its dominance. A plateau is reached in 1891 as agriculture maintains its supremacy until 1941. Then, as fast as agriculture invaded land, it fades away until 1986 when agricultural land‐cover stops shrinking. The opening of forest for cultivation was relatively slow in SDG because of biophysical and socio‐economical conditions associated with an absence of growth of agricultural population. Deforestation and wetland drainage led to a degradation of agricultural life but resulted in consideration of the environment in agriculture. Today, wooded and agricultural land covers are more balanced and environmental effects less acute.     

Esquisses géographiques des récits cinématographiques Canadiens contemporains

Films carry an original geographic discourse. Beyond the vision of an author, they often reflect a society's perspective on territories. The goal of this research is to study the geographic discourse developed by Canadian cinema through an analysis of the places structuring Canadian cinematographic narratives. This analysis is based on the systematic study of a selection of 46 contemporary Canadian films. These films have been transformed into a database of 2200 places using an original geographic reading grid. Analysis of these places identifies the existence of territories under‐ and over‐represented by Canadian cinema, as well as territories of consensus and divergence that exist between different categories of Canadian cinema such as Quebecois, anglophone, and hybrid. Some interesting results include the general lack of interest in the southern hemisphere—notably Latin America—as well as in the Nordic territories (outside of First Nations cinema). It is also interesting to note the quasi‐absence of Vancouver on the screen, while Toronto and the United States appear recurrently. But the most striking result is probably the profound divergence in the way Canadian cinema treats the province of Quebec in general, and the city of Montreal in particular. Montreal is indeed the perfect example of a space of divergence: the city is heavily represented in Quebecois films, but completely ignored in the rest of Canadian cinematographic production. This deep opposition illustrates the importance of downtown Montreal as a symbolic space of Quebec national identity.