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    Predicting Stock Market Indicators Through Sentiment Analysis On Twitter

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    Public mood can affect individual behavior. In this paper, I explores the relationship between public mood and trend of stock market. In this paper, I collected one-month Tweets in terms of several aspects such as happy, sad. I train a labeled movie reviews as the training data using Recurrent Neural Network (RNN). Then, I classify the Tweets based on the trained model in real time. After the sentiment analysis on Tweets, I use the linear and polynomial models to predict the stock prices of SPY. My results show that RNN is one of promising methods to do sentiment analysis on Tweets and the predictions made by the classification of RNN are good resources to predict stock prices

    Annexe de la lecture critique : « Effondrement sociologique ou la panique morale d'un sociologue » parue dans le n° 134 (vol. 35) de Politix (2021)

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    Ce document forme l'annexe de la lecture critique de Apocalypse Cognitive [1], parue dans la rubrique En débat de Politix [2] .Dans Apocalypse Cognitive, Gérald Bronner fait référence à un certain nombre d’études précises à l’appui de son argumentation. Nous avons essayé d’examiner au fil de la lecture la plupart de celles s’appuyant sur des analyses quantitatives de première main, c’est-à-dire lorsque nous pouvions vérifier les données et leur interprétation, afin d’évaluer si Bronner en fait un usage correct ou pas. Nous avons porté une attention particulière aux études de psychologie cognitive et de neurosciences, qui font l’originalité de ce travail en sociologie et qui sont censées en faire la force, et qui soutiennent la thèse principale des capacités du cerveau humain déterminant les comportements sociaux. Nous avons présenté un certain nombre de ces analyses dans la lecture critique de Politix. Nous ne les reproduisons pas ici mais renvoyons alors le lecteur ou la lectrice à la lecture critique. [1] Gérald Bronner, Apocalypse Cognitive, Paris, Presses Universitaires de France, 2021.[2] Jean-Michel Hupé, Jérôme Lamy, Arnaud Saint-Martin, « Effondrement sociologique ou la panique morale d’un sociologue », Politix, vol. 35, n° 134, 2021

    Synthèse de restitution : Série d’ateliers participatifs sur le rôle de la cartographie dans la planification spatiale maritime

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    Ce document est une synthèse des résultats obtenus à la suite des ateliers participatifs menés par Juliette Davret avec la Chaire maritime sur le rôle de la cartographie dans la planification. Résumé ici en quelques pages, l’ensemble des résultats pourra être accessible dans le manuscrit de thèse de Juliette Davret. Ce travail fera l’objet d’un article scientifique dans le cadre du travail de thèse de Juliette Davret. Les résultats énoncés ici n’ont pas encore fait l’objet d’une révision par les pairs

    : Rapport final

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    Vivre avec le risque à Mayotte: une étude de la vulnérabilité sociale au risque de pollution de l'eau dans un quartier précaire de l'île

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    The research presented here focuses on the social management of water for users of the Kierson district of the municipality of Koungou in Mayotte. In a context of health risk linked to water pollution and for which the epidemic risk (recurrent cases of typhoid fever) was exacerbated by the water crisis which raged for several months on the island in 2017, this research draws up the profile of populations vulnerable to health risk with a view to improving the coping capacities of these populations. The social and health issue is strong. If there is epidemiological surveillance in Mayotte and an institutional desire to reduce the epidemic risk, its operationalization is not yet efficient. The promotion of health with a view to reducing social inequalities in health through access to water for all suffers from a lack of social data in the field, particularly for the identification of various forms of social water management . Research examines what conditions social vulnerability to the risk of water pollution both from a structural point of view (access to water, living conditions, economic precariousness) and from the angle of practices linked to water pollution and the resulting representations of the epidemic risk.La recherche présentée ici s’intéresse à la gestion sociale de l’eau des usagers du quartier Kierson de la commune de Koungou à Mayotte. Dans un contexte de risque sanitaire lié à la pollution de l’eau et pour lequel le risque épidémique (cas récurrents de fièvre typhoïde) a été exacerbé par la crise de l’eau qui a sévi durant plusieurs mois sur l’île en 2017, la recherche sociologique dresse le portait des populations vulnérables au risque sanitaire en vue d’améliorer les capacités à faire face de ces populations. L’enjeu social et sanitaire est fort si il existe une surveillance épidémiologique à Mayotte et une volonté institutionnelle de réduire le risque épidémique, son opérationnalisation n’est pas encore efficiente. La promotion de la santé en vue de la réduction des inégalités sociales de santé par l’accès à l’eau pour tous pâtie d’un manque de données sociales de terrain notamment pour l’identification des diverses formes de gestion sociale de l’eau. La recherche examine ce qui conditionne la vulnérabilité sociale face au risque de pollution de l’eau à la fois sous l’angle structurel (accès à l’eau, conditions de vie, précarité économique) et sous l’angle des pratiques liées à l’eau et des représentations du risque épidémique qui en découlent

    Data collection and analysis tools for food security and nutrition: towards enhancing effective, inclusive, evidence-informed, decision making. A report by the High Level Panel of Experts on Food Security and Nutrition of the Committee on World Food Security,

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    • Throughout the world, high-quality, timely and relevant data are key to inform actions that promote better access to food and improved nutrition.• Despite the abundant and growing availability of data and information relevant to food security and nutrition, often policymakers are not aware of the existence and relevance of such data or do not use them appropriately, due to challengesat each step of the data cycle, which includes: defining priorities and data needs; reviewing, consolidating, collecting and curating data; analyzing the data using appropriate tools; translating data into relevant insights to be disseminated and discussed; and, finally, using data for decision-making.• Fundamental data gaps still exist to correctly guide action and inform policymaking, especially in terms of timely and sufficiently granulardata on people’s ability to locally produce and access food, on their actual food and nutrient consumption, and on their nutritional status. Increased and sustained financial investment is needed to overcome these gaps.• Several other constraints limit the effectiveness of data-informed policy action, especially in low-resource countries. Key among them is the low level of data literacy and analysis skills (for both qualitative and quantitative data) on the part of data and information users atall levels – from data collectors and analysts, to decision-makers, and to the people, as the ultimate beneficiaries of food security and nutrition policies.• The complexity of the system of public and private actors and institutions involved in food security and nutrition data, coupled with the rapidly changing characteristics of today’s data ecosystems due to the digital revolution and the pervasiveness of the internet, brings to centre stage the need for global coordination to improve data governance. Particularly urgent is the need to reach agreement on the nature of FSN data and information as a public good, and, on that basis, to establish a global legal frameworkthat allows for the broadest possible circulation of relevant information, while preserving the rights of the people to whom the data ultimately belongs

    Unanticipated Object Synchronisation for Dynamically-Typed Languages

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    Developing concurrent programs requires the use of threadsafe abstractions to avoid race conditions. Nevertheless, many libraries are not thread-safe either because it was not a concern for the developer or the developer purposely traded thread-safety for performance. All calls to such a library require to be synchronised in the client program. While different synchronisation mechanisms exist, only lock-based solutions and transaction solutions allow one to add synchronisation without anticipation. But they are both about reasoning in terms of execution. It forces developers to explore the whole execution to identify when synchronisation is required. A developer accidentally missing a synchronisation point circumvents the mechanism. Instead by ensuring exclusive access to an object for a thread prevents other thread to access it and thus allows developers to miss synchronisation points without circumventing the mechanism. In this paper, we propose the Atomic Samurai, a synchronisation model that is object-based, unanticipated, and while the object is synchronised the rest of the program normally runs concurrently. It relies on 3 mechanisms: pointer swapping to ensure reference unicity, proxies to control object accesses and late binding to intercept and redirect messages sent. We validate our approach by showing how Atomic Samurai helps both solving examples extracted from the literature and a real-world scenario from the Pharo community on font rendering. We also measure the impact in performance of our solution by comparing it with a semaphore-based solution. In term of performance, our solution is 5 orders of magnitude slower than the semaphore-based solution, but scales better with the number of processes

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