108 research outputs found

    EQUIVALENCES BETWEEN STOCHASTIC SYSTEMS

    Full text link
    Time-dependent correlation functions of (unstable) particles undergoing biased or unbiased diffusion, coagulation and annihilation are calculated. This is achieved by similarity transformations between different stochastic models and between stochastic and soluble {\em non-stochastic} models. The results agree with experiments on one-dimensional annihilation-coagulation processes.Comment: 15 pages, Latex. Some corrections made and an appendix adde

    Reaction-Diffusion Processes from Equivalent Integrable Quantum Chains

    Full text link
    One-dimensional reaction-diffusion systems are mapped through a similarity transformation onto integrable (and a priori non-stochastic) quantum chains. Time-dependent properties of these chemical models can then be found exactly. The reaction-diffusion processes related to free fermion systems with site-independent interactions are classified. The time-dependence of the mean particle density is calculated. Furthermore new integrable stochastic processes related to the Heisenberg XXZ chain are identified and the relaxation times for the particle density and density correlation for these systems are found.Comment: 67 pages, Latex, 3 eps figures. (final version, typos corrected

    Élaboration d’un guide pratique Equi’friendly à destination des étudiants vétérinaires

    No full text
    Being a prey, the behavior of horses is hardly predictable. The first contact with them for some veterinary students is to be found in the school clinics. Furthermore, horses’ behavior is not easy to understand at first sight. To that end, a pedagogic and illustrated booklet, whose conception is extensively detailed in this thesis, has been written fulfilling the following purposes. Firstly, it deals with common knowledge about horses by giving insights on how they react to situations and interact with their congeners and their environment as well as presenting their gregarious instinct. Then, it explains the way we can make them learn new things by giving concrete examples. Last but not least, practical case studies, that some could face in clinics, can be found in the booklet alongside some hints to ease the daily care of hospitalized horses.Le cheval est un animal pouvant être imprévisible du fait de son statut de proie. Les étudiants vétérinaires sont mis en relation avec celui-ci en cliniques au sein de l’école, et pour certains d’entre eux, c’est une première d’en côtoyer. Le comportement des équidés est loin d’être évident à décrypter à première vue. C’est pourquoi la conception d’un livret pédagogique illustré, appuyé par un manuscrit reprenant l’ensemble des références bibliographiques, a vu le jour dans le but de remplir plusieurs objectifs. Tout d’abord, il reprend certaines généralités sur le cheval, expliquant ses réactions, son instinct grégaire, et sa façon d’interagir avec ses congénères et son environnement. Ensuite, il explique la théorie de l’apprentissage et présente des exemples concrets. Enfin, il expose des mises en situations auxquelles les étudiants seront potentiellement confrontés au cours de leurs semaines de clinique et fournit des astuces pour faciliter les soins quotidiens des chevaux hospitalisés

    Une méthode de mesure des spectres de particules dans les milieux irradies

    Full text link

    Une méthode de mesure des spectres de particules dans les milieux irradies

    No full text
    On expose une méthode de mesure des distributions directionnelles et énergétiques de photons ou d’électrons dans les milieux irradiés. L’objectif poursuivi est d’obtenir l’un des paramètres de base indispensables pour rendre compte de l’évolution d’un système moléculaire irradié. Les conditions de validité expérimentale de la méthode proposée sont examinées pour le cas des photons γ. La conclusion est que cette méthode est utilisable dans de nombreux domaines énergétiques, à condition d’y apporter les aménagements techniques nécessaires

    Reactions chimiques couplees considerees en tant que filtres passe-bande

    No full text

    The Potential Influence of the Cost of Carbon on Asphalt Pavement Construction

    No full text
    Thesis (Master's)--University of Washington, 2025Life Cycle Cost Analysis (LCCA) is a decision support method used in the roadway industry to compare the financial differences between alternative paving options. This project considers how the cost of carbon may be incorporated into LCCA studies, and what impact that may have on decision-making. A literature review on existing carbon costing avenues determined 35/MTCO2eatadiscountrateof235/MTCO2e at a discount rate of 2% to be a representative metric for case study analysis. Performing three Washington State highway paving case studies through the RealCost 3.0 software produced separate agency and user costs. The agency cost of carbon is calculated through the asphalt material’s global warming potential (GWP), while the user cost of carbon is based on excess vehicle emissions due to traffic delays. At the previously assigned unit cost of carbon, case study LCCA results showed the cost of carbon to contribute around 1% of total agency and user value. A further sensitivity analysis determined that in order to reach 10% of project value, the cost of carbon would need to be between 300 and $500 per MTCO2e. These results demonstrated that the value of greenhouse gas emissions would need to be much higher in order for it to play a significant role in decision-making in the pavement industry

    Exposé de quelques lois pour la philosophie de l'histoire.

    No full text
    Mode of access: Internet
    corecore