Pseudo Random Number Coding for Lift Car Position Sensing

Aiming at the disadvantages of the traditional positioning for lift car applications, a novel binary bar coding and sensing technology is presented in this paper. It studies the relationship of the addressable length and the number of digits to be sensed. A more systematic approach is demonstrated to generate the pseudo random code more efficiently than the random sorting method used in the example case. Finally, a function of vector distance is developed to measure the difference of any two groups of the digits to be sensed along the complete code sequence. By searching the maximum of the vector distance, the optimal sequence can be achieved to reduce the chance of decode error

CDF W mass anomaly from a dark sector with a Stueckelberg-Higgs portal

We propose an explanation to the new W mass measurement recently reported by the CDF collaboration, which is larger than the standard model expectation by about 7 standard deviations. To alleviate the tensions that are imposed on the electroweak sector by the new W mass measurement, we carry out an analysis in the Stueckelberg extended standard model where a new neutral gauge boson appears which mixes with the two neutral gauge bosons in the electroweak sector both via the Stueckelberg mass terms and via the gauge invariant Stueckelberg-Higgs portal interaction and spoils the custodial symmetry at the tree level so that the simple relation between the W boson mass and the Z boson mass does not hold. We find that such an extension increases the W boson mass if the new gauge boson mass is larger than the Z boson mass. We further show that there exists a significant part of the parameter space in the extended model which includes the CDF mass anomaly and is consistent with the various observables at the Z pole and consistent with the ATLAS dilepton limits. The Stueckelberg $Z'_{\rm St}$ boson, which resolves the CDF W mass anomaly, should be searchable in future LHC experiments.Comment: v1, 6 pages, 2 figures. v2, refs adde

Millicharged particles from proton bremsstrahlung in the atmosphere

Light millicharged particles can be copiously produced from meson decays in cosmic ray collisions with the atmosphere, leading to detectable signals in large underground neutrino detectors. In this paper we study a new channel to produce millicharged particles in the atmosphere, the proton bremsstrahlung process. We find that the proton bremsstrahlung channel can produce a much larger flux of millicharged particles than the previously studied meson decay channel, resulting in an improvement on the SuperK limit by nearly one order of magnitude. Consequently, SuperK can probe new parameter space beyond the current leading limits from ArgoNeuT. We further note that the study on the proton bremsstrahlung process can be extended to other atmospherically produced light particles, and to millicharged particle searches in proton accelerators.Comment: 11 pages, 8 figure

DSS Architecture for Water Uses Management

AbstractManagement of water uses requests to harmonize demands and needs which are getting more and more complex and sophisticated. During the past 3 decades, modelling systems for hydrology, hydraulics and water quality have been used as stand alone products and were used in order to produce an analysis of a current situation and to generate forecast according to different horizons. The current situation, characterized by the fast increase of monitoring devices mainly in the urban environments, requests an integration of the modelling tools in global information systems that are now dedicated to the global management of urban environments and related services. Energy distribution, water distribution, solid wastes collection, traffic optimization are today major issues for cities that are looking for functional Decisions Supports Systems that may integrated the various components and operate in a sustainable perspective. The modelling systems used for hydrology, hydraulic and water quality have to integrate a common framework allowing modular approach and interoperability. The paper presents a generic operational approach that could be implemented in order to address the management of water uses in a complex urban environment: water supply security issues from groundwater resources, inundation risk and water resources management under the perspective of climate change. The architecture is based on the interoperability of the various models and is integrated in a platform allowing to organize the workflows of data and the production of real time information's used by the decision makers. The current approached is implemented within the AquaVar project on the Var catchment located in the French Riviera

Amplifying Non-Resonant Production of Dark Sector Particles in Scattering Dominance Regime

We investigate the enhancement of dark sector particle production within the scattering dominant regime. These particles typically exhibit a slight mixing with Standard Model particles through various portals, allowing for their generation through in-medium oscillation from Standard Model particle sources. Our analysis reveals that in the scattering dominance regime, with a significantly smaller scattering mean free path $\lambda_{\rm sca}$ compared to the absorption mean free path $\lambda_{\rm abs}$, the non-resonant production of sterile states can experience an enhancement by a factor of $\lambda_{\rm abs}/\lambda_{\rm sca}$. This phenomenon is demonstrated within the context of kinetic mixing dark photon production at a reactor, precisely satisfying this condition. By incorporating this collisional enhancement, we find that the current sensitivity to the mixing parameter $\epsilon$ for dark photons in the TEXONO experiment can be significantly improved across a range spanning from tens of eV to MeV. This advancement establishes the most stringent laboratory constraint within this mass spectrum for the dark photon. Sterile neutrino production, however, does not exhibit such enhancement, either due to the failure to meet the scattering dominance criterion or the neutrino damping in resonant production.Comment: 8 pages, 4 figure

An elastic-viscoplastic creep model for describing creep behavior of layered rock

To describe the full-stage creep behavior of layered rock accurately, a new elastic-viscoplastic creep model is proposed based on fractional order theory in this manuscript, which consists of a Hooke elastomer, a fractional Abel dashpot, a Kelvin body, and a new non-linear visco-plastic component. The non-linear creep model can not only describe the changes in three creep stages (primary creep, steady-state creep and accelerating creep) but also reflect the influence of different bedding angles of rock. The constitutive equations of the non-linear creep model are deduced by the empirical model method and plastic theory method, respectively. The parameters of the non-linear creep model are identified using the Levenberg-Marquardt algorithm from Origin. It shows that the creep model in this paper are highly consistent with the experimental data under different load levels, creep stages and bedding angles, and the accuracy and rationality of the model are verified. Moreover, the creep constitutive equations for layered rock derived by the two methods have the same fitting effect on the same set of experimental data

FullSWOF: A software for overland flow simulation / FullSWOF : un logiciel pour la simulation du ruissellement

Overland flow on agricultural fields may have some undesirable effects such as soil erosion, flood and pollutant transport. To better understand this phenomenon and limit its consequences, we developed a code using state-of-the-art numerical methods: FullSWOF (Full Shallow Water equations for Overland Flow), an object oriented code written in C++. It has been made open-source and can be downloaded from http://www.univ-orleans.fr/mapmo/soft/FullSWOF/. The model is based on the classical system of Shallow Water (SW) (or Saint-Venant system). Numerical difficulties come from the numerous dry/wet transitions and the highly-variable topography encountered inside a field. It includes runon and rainfall inputs, infiltration (modified Green-Ampt equation), friction (Darcy-Weisbach and Manning formulas). First we present the numerical method for the resolution of the Shallow Water equations integrated in FullSWOF_2D (the two-dimension version). This method is based on hydrostatic reconstruction scheme, coupled with a semi-implicit friction term treatment. FullSWOF_2D has been previously validated using analytical solutions from the SWASHES library (Shallow Water Analytic Solutions for Hydraulic and Environmental Studies). Finally, FullSWOF_2D is run on a real topography measured on a runoff plot located in Thies (Senegal). Simulation results are compared with measured data. This experimental benchmark demonstrate the capabilities of FullSWOF to simulate adequately overland flow. FullSWOF could also be used for other environmental issues, such as river floods and dam-breaks.Comment: 9 page

Integrated hydraulic modeling of groundwater flow and river-aquifer exchanges in the lower valley of Var River

La modélisation hydraulique avec modèle déterministe est une méthode largement utilisée. Cependant,lamodélisation est un ptocessus complexe, notamrnent pour les aquifères où la quantité et la qualité desdonnées ne sont pas satisfaisantes. Etantune des sources pdncipales de I'eau douce dans la basse valléedu Var, Côte d',{.zur,Frarrce,la nappe libre de lavallée est menacée parla pénurie et la pollution. Maþéle grand nombre d'études effectuées dans cette zone, la dynamique des écoulements souterrains esttoujours patiellement inconnue. Par conséquent, la métropole Nice Côte d'Azur a besoin de développerun système d'aide à la décision (SÂD) à base des modèles numériques afin d'assurer une gestion plusefficace de l'eau souteraine. Un modèle numérique est développé avec FEFLO\ø en tenant compte desprécipitations, de l'é:vapoftanspiration, du pompage de l'eau souterraine, et des échanges nappe-rivière.Le volume d'eau pompée pour l'usage agdcole et le taux d'échange du lit mineur du Var ont été calibrés.Le modèle a été. vabdé. par une simulation de '1.266 jours. Le modèle est utilisé pour simuler les scénatüdes événements d'inondation et de sécheresse, les scénadi de pollution et l'intrusion d'eau de mer dans lavallée. Une première conception du système d'aide à la décision est présentée comme le demier exemplede l'application du modèle. Une interface de couplage est développée en Java et sert à échanger lesdonnées entre le modèle souterrain et le modèle à surface libre élaboré avec MIKE21FM.Groundwater modeling with deterministic model is a complicated process, especially in complex aquiferswhere the quantity and the quality of the measuted data arc not satisfying. The unconfined alluvialaquifet is the main water resource in the lower valley of Vat river, Ftench Riviera, but it faces a thteat ofshortage and pollution. Despite numerous previous studies, the dynamics of the gtoundwater flow in thealluvial aquifer and the characteristics of the rivet-aquifer exchanges ¿re s':ll partially unknown.Therefore the local u/ater management service requires a decision support system PSS) based onnumerical models to ensure a better groundwater management. A hydraulic model is set up withFEFLO!ø software by considedng ptecþitation, evâpotranspiration, gtoundwatet exftacdon and rivetaquiferexchanges. The non-documented groundwater exttaction fot agticultural use and the transferrates in the dverbed along the river have been calibtated. The model has been validated with asimulation of 7266 days. The model is applied to simulate the scenarios of flood and drought events, thepollution events in the unconfined aquifer in the valley and the seawater inrusion in the estuary of Yarriver. These case studies contributes to increase the knowledge of the aquifet. A fust conception of theDSS tool is presented as the last example of model application. A coupling interface is developed thanksto aJava which enables an automatic exchange of data between the groundwater flow model and thesurface wâter flow model built with MII(E2ltr}'/. More tests should be done to validate the couplinginterfac