Measurement of the Total Active 8B Solar Neutrino Flux at the Sudbury Neutrino Observatory with Enhanced Neutral Current Sensitivity

The Sudbury Neutrino Observatory (SNO) has precisely determined the total active (nu_x) 8B solar neutrino flux without assumptions about the energy dependence of the nu_e survival probability. The measurements were made with dissolved NaCl in the heavy water to enhance the sensitivity and signature for neutral-current interactions. The flux is found to be 5.21 +/- 0.27 (stat) +/- 0.38 (syst) x10^6 cm^{-2}s^{-1}, in agreement with previous measurements and standard solar models. A global analysis of these and other solar and reactor neutrino results yields Delta m^{2} = 7.1^{+1.2}_{-0.6}x10^{-5} ev^2 and theta = 32.5^{+2.4}_{-2.3} degrees. Maximal mixing is rejected at the equivalent of 5.4 standard deviations.Comment: Submitted to Phys. Rev. Let

Low Computational Cost Hybrid Approach for Near-Field RFID Tag Localization

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A LPV suspension control with performance adaptation to roll behavior, integrated in a global vehicle dynamics control strategy

International audienceThis paper is concerned with an integrated vehicle dynamic control using different kind of actuators. The new and very interesting trends in vehicle dynamic control are to synthesize multivariable controllers using LPV/H∞ framework, see [1]. A new strategy for global chassis control is proposed using a smart coordination between the front/rear active steering actuators and four active suspension ones in order to improve vehicle handling and ride performances. This control is achieved in the LPV/H∞ robust control framework, which allows activating appropriately the steering controllers and performs suitable combination with the suspension control depending on some varying parameters. First the use of front and rear steering actuators is of great interest to control the yaw rate, and to maintain a low side-slip angle in order to keep the vehicle stability (without using the braking systems that would reduce the vehicle speed). On the other hand the suspension control is adapted simultaneously (for each of the four active dampers) in order to ensure the passenger comfort in normal situations and, in the case of critical driving situations, to improve the road handling performances. In particular the objectives will be to mitigate the influence of the road profile (stochastic), to reduce the effects of load transfers, and to minimize the roll angle. A specific stability monitor based on the vehicle side-slip measurement provides the scheduling parameter which enables the active steering control when a dangerous situation appears. This new kind of scheduling strategy permits smooth control actions between the suspension and steering systems. The interesting side effect concerns the prevention of the car skidding behavior that would appear using active braking systems (due to possible high braking torques). Simulations on a full non-linear vehicle model, subject to dangerous driving situation, reveals the satisfactory improvements on the vehicle handling performance, stability and robustness of the proposed LPV/H∞ control strategy

Optimizing Sustainability: Exergoenvironmental Analysis of a Multi-Effect Distillation with Thermal Vapor Compression System for Seawater Desalination

\ua9 2024, Tech Science Press. All rights reserved.Seawater desalination stands as an increasingly indispensable solution to address global water scarcity issues. This study conducts a thorough exergoenvironmental analysis of a multi-effect distillation with thermal vapor compression (MED-TVC) system, a highly promising desalination technology. The MED-TVC system presents an energy-efficient approach to desalination by harnessing waste heat sources and incorporating thermal vapor compression. The primary objective of this research is to assess the system’s thermodynamic efficiency and environmental impact, considering both energy and exergy aspects. The investigation delves into the intricacies of energy and exergy losses within the MED-TVC process, providing a holistic understanding of its performance. By scrutinizing the distribution and sources of exergy destruction, the study identifies specific areas for enhancement in the system’s design and operation, thereby elevating its overall sustainability. Moreover, the exergoenvironmental analysis quantifies the environmental impact, offering vital insights into the sustainability of seawater desalination technologies. The results underscore the significance of every component in the MED-TVC system for its exergoenvironmental performance. Notably, the thermal vapor compressor emerges as pivotal due to its direct impact on energy efficiency, exergy losses, and the environmental footprint of the process. Consequently, optimizing this particular component becomes imperative for achieving a more sustainable and efficient desalination system