Les « morts vivants » à Cam Ne. Le premier « Zippo raid » de la guerre du Viêt-nam

Le 3 août 1965, la compagnie D du 1st Battalion, 9thMarines, investit le village de Cam Ne, au Sud Viêt-nam. L'opération « search and destroy » est filmée par un correspondant de CBS News, Morley Safer. Les images de la destruction d’un village sud-viêtnamien par les Marines choquent profondément les États-Unis tout en donnant naissance au terme de « zippo raid ». Pourtant, l’incendie de ces maisons s’inscrit dans l’évolution du conflit viêtnamien lui-même avec l’intervention de plus en plus massive des Américains au Sud Viêt-nam.On August 3, 1965, Company D of the 1st Battalion, 9th Marines, surrounded the village of Cam Ne in South Vietnam. The “search and destroy” operation was filmed by CBS News correspondent Morley Safer. The images of the destruction of a South Vietnamese village by Marines deeply shocked the United States while giving rise to the term “zippo raid”. However, the burning of these houses was part of the evolution of the Vietnamese conflict itself with the more and more massive intervention of Americans in South Vietnam

Les « morts vivants » à Cam Ne. Le premier « Zippo raid » de la guerre du Viêt-nam

Le 3 août 1965, la compagnie D du 1st Battalion, 9thMarines, investit le village de Cam Ne, au Sud Viêt-nam. L'opération « search and destroy » est filmée par un correspondant de CBS News, Morley Safer. Les images de la destruction d’un village sud-viêtnamien par les Marines choquent profondément les États-Unis tout en donnant naissance au terme de « zippo raid ». Pourtant, l’incendie de ces maisons s’inscrit dans l’évolution du conflit viêtnamien lui-même avec l’intervention de plus en plus massive des Américains au Sud Viêt-nam.On August 3, 1965, Company D of the 1st Battalion, 9th Marines, surrounded the village of Cam Ne in South Vietnam. The “search and destroy” operation was filmed by CBS News correspondent Morley Safer. The images of the destruction of a South Vietnamese village by Marines deeply shocked the United States while giving rise to the term “zippo raid”. However, the burning of these houses was part of the evolution of the Vietnamese conflict itself with the more and more massive intervention of Americans in South Vietnam

Understanding the Variability in Graph Data Sets through Statistical Modeling on the Stiefel Manifold

International audienceNetwork analysis provides a rich framework to model complex phenomena, such as human brain connectivity. It has proven efficient to understand their natural properties and design predictive models. In this paper, we study the variability within groups of networks, i.e., the structure of connection similarities and differences across a set of networks. We propose a statistical framework to model these variations based on manifold-valued latent factors. Each network adjacency matrix is decomposed as a weighted sum of matrix patterns with rank one. Each pattern is described as a random perturbation of a dictionary element. As a hierarchical statistical model, it enables the analysis of heterogeneous populations of adjacency matrices using mixtures. Our framework can also be used to infer the weight of missing edges. We estimate the parameters of the model using an Expectation-Maximization-based algorithm. Experimenting on synthetic data, we show that the algorithm is able to accurately estimate the latent structure in both low and high dimensions. We apply our model on a large data set of functional brain connectivity matrices from the UK Biobank. Our results suggest that the proposed model accurately describes the complex variability in the data set with a small number of degrees of freedom