71 research outputs found

    The failed liberalisation of Algeria and the international context: a legacy of stable authoritarianism

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    The paper attempts to challenge the somewhat marginal role of international factors in the study of transitions to democracy. Theoretical and practical difficulties in proving causal mechanisms between international variables and domestic outcomes can be overcome by defining the international dimension in terms of Western dominance of world politics and by identifying Western actions towards democratising countries. The paper focuses on the case of Algeria, where international factors are key in explaining the initial process of democratisation and its following demise. In particular, the paper argues that direct Western policies, the pressures of the international system and external shocks influence the internal distribution of power and resources, which underpins the different strategies of all domestic actors. The paper concludes that analysis based purely on domestic factors cannot explain the process of democratisation and that international variables must be taken into more serious account and much more detailed

    Application of deep learning models to improve ulcerative colitis endoscopic disease activity scoring under multiple scoring systems

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    Background and Aims Lack of clinical validation and inter-observer variability are two limitations of endoscopic assessment and scoring of disease severity in patients with ulcerative colitis [UC]. We developed a deep learning [DL] model to improve, accelerate and automate UC detection, and predict the Mayo Endoscopic Subscore [MES] and the Ulcerative Colitis Endoscopic Index of Severity [UCEIS]. Methods A total of 134 prospective videos [1550 030 frames] were collected and those with poor quality were excluded. The frames were labelled by experts based on MES and UCEIS scores. The scored frames were used to create a preprocessing pipeline and train multiple convolutional neural networks [CNNs] with proprietary algorithms in order to filter, detect and assess all frames. These frames served as the input for the DL model, with the output being continuous scores for MES and UCEIS [and its components]. A graphical user interface was developed to support both labelling video sections and displaying the predicted disease severity assessment by the artificial intelligence from endoscopic recordings. Results Mean absolute error [MAE] and mean bias were used to evaluate the distance of the continuous model’s predictions from ground truth, and its possible tendency to over/under-predict were excellent for MES and UCEIS. The quadratic weighted kappa used to compare the inter-rater agreement between experts’ labels and the model’s predictions showed strong agreement [0.87, 0.88 at frame-level, 0.88, 0.90 at section-level and 0.90, 0.78 at video-level, for MES and UCEIS, respectively]. Conclusions We present the first fully automated tool that improves the accuracy of the MES and UCEIS, reduces the time between video collection and review, and improves subsequent quality assurance and scoring

    Bioluminescent Imaging of Trypanosoma brucei Shows Preferential Testis Dissemination Which May Hamper Drug Efficacy in Sleeping Sickness

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    Monitoring Trypanosoma spread using real-time imaging in vivo provides a fast method to evaluate parasite distribution especially in immunoprivileged locations. Here, we generated monomorphic and pleomorphic recombinant Trypanosoma brucei expressing the Renilla luciferase. In vitro luciferase activity measurements confirmed the uptake of the coelenterazine substrate by live parasites and light emission. We further validated the use of Renilla luciferase-tagged trypanosomes for real-time bioluminescent in vivo analysis. Interestingly, a preferential testis tropism was observed with both the monomorphic and pleomorphic recombinants. This is of importance when considering trypanocidal drug development, since parasites might be protected from many drugs by the blood-testis barrier. This hypothesis was supported by our final study of the efficacy of treatment with trypanocidal drugs in T. brucei-infected mice. We showed that parasites located in the testis, as compared to those located in the abdominal cavity, were not readily cleared by the drugs

    Neutrinoless Double ÎČ\beta-Decay: Status and Future

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    A brief summary of the status of neutrino masses, mixing and oscillations is presented. Neutrinoless double ÎČ\beta-decay is considered. Predictions for the effective Majorana mass are reviewed. A possible test of the calculations of nuclear matrix elements of the 0ÎœÎČÎČ0\nu\beta\beta-decay is proposed.Comment: A report at the International conference ``Non-Accelerator New Physics'' NANP05 Dubna, Russia, June 20-25, 200

    Fractal, Kilim, JAC : une expérience comparative

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    International audienceCet article compare trois techniques pour la sĂ©paration des caractĂ©ristiques fonctionnelleset non-fonctionnelles des applications : Fractal, Kilim, et JAC. Les trois sont des frameworksdu consortium ObjectWeb. Les deux premiĂšres sont dĂ©diĂ©es Ă  l’assemblage et la configurationde composants Java, tandis que JAC est un framework de programmation orientĂ©e aspecten Java. A travers lÂ’Ă©tude d’un service distribuĂ© de partage de donnĂ©es selon l’algorithme decohĂ©rence de K. Li P. Hudak, nous montrons les similitudes et les diffĂ©rences entre les troisframeworks. Au delĂ  de cet exemple, nous tentons de gĂ©nĂ©raliser et proposons diffĂ©rents critĂšrespour comparer les trois approches

    Mali: the short-sightedness of donor-driven peacebuilding

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