Evaluating system architectures for driving range estimation and charge planning for electric vehicles

Due to sparse charging infrastructure and short driving ranges, drivers of battery electric vehicles (BEVs) can experience range anxiety, which is the fear of stranding with an empty battery. To help eliminate range anxiety and make BEVs more attractive for customers, accurate range estimation methods need to be developed. In recent years, many publications have suggested machine learning algorithms as a fitting method to achieve accurate range estimations. However, these algorithms use a large amount of data and have high computational requirements. A traditional placement of the software within a vehicle\u27s electronic control unit could lead to high latencies and thus detrimental to user experience. But since modern vehicles are connected to a backend, where software modules can be implemented, high latencies can be prevented with intelligent distribution of the algorithm parts. On the other hand, communication between vehicle and backend can be slow or expensive. In this article, an intelligent deployment of a range estimation software based on ML is analyzed. We model hardware and software to enable performance evaluation in early stages of the development process. Based on simulations, different system architectures and module placements are then analyzed in terms of latency, network usage, energy usage, and cost. We show that a distributed system with cloud‐based module placement reduces the end‐to‐end latency significantly, when compared with a traditional vehicle‐based placement. Furthermore, we show that network usage is significantly reduced. This intelligent system enables the application of complex, but accurate range estimation with low latencies, resulting in an improved user experience, which enhances the practicality and acceptance of BEVs

Diagnóstico situacional Hospital Gaspar García Laviana- Rivas y Ernesto Sequeira- Región Autónoma Atlántico Sur. Nicaragua. Año 2004.

Estudio de tipo descriptivo de corte transversal, en los Hospitales Ernesto Sequeira de la Región Autónoma del Atlántico Sur y Gaspar García Laviana de Rivas durante el año 2004. Se encontró que en ambos Hospitales brindan atención general, de prioridad Materno-Infantil, ubicados en las cabeceras de los departamentos; pertenecen al Segundo nivel de atención, con un nivel de complejidad básico, de referencias departamental para los centros de salud, cuyo propietario es el Ministerio de Salud. Con poblaciones objetivos mayores de 175,000 habitantes donde el 65% de las personas son niños o mujeres en edad de procrear. La cartera de servicios que ofertan ambos hospitales es acorde a su complejidad en las que se encuentran las cuatro especialidades básicas Medicina Interna, Cirugía General, Pediatría y Gineco obstetricia y los servicios de apoyo tales como: Farmacia, Radiología, Laboratorio así como en su estructura física cuenta con consultorios para consulta externa, emergencia, quirófanos, salas de parto y camas censables. El número de recursos humanos en cada hospital es mayor a 300 personas, donde el 55 al 60% es asistencial. En los recursos financieros el 80% del presupuesto proviene de fondo fiscal y el mayor gasto es en el pago de recursos humanos. El equipamiento asistencial de los hospitales se encuentra desfasado y obsoleto, entre el 20 al 40% en regular y muy mal estado y tienen más de un año de estar sin funcionamiento y no han sido reparados. El modelo de gestión de ambos hospitales es tradicional, sin implementación de herramientas gerenciales, ni toma de decisiones. La producción de servicios es baja en relación a su capacidad instalada

In-situ pulsed laser induced growth of CdS nanoparticles on ZnO nanorods surfaces

Herein we present a process for the in-situ growth of CdS nanoparticles using a pulsed laser irradiation. A Nd-YAG laser was applied to ZnO nanorods previously submerged in an aqueous precursor solution containing cadmium chloride and thiourea. For optimum values of the laser fluence, around 40 mJ/cm2 it was possible to fabricate a highly homogeneous film of CdS nanoparticles covering the ZnO nanorods surface. Cathodoluminescence measurements of the ZnO/CdS structure show the quenching of the ZnO yellow and green luminescence, indicating the ZnO surface defects passivation by CdS nanostructures. Although lasers have been already used for inducing growth in solution, this work presents new evidence of in-situ growth on the surface of nanostructured materials. The laser based technique presented is simple, easy to implement, scalable and it could be applied in the fabrication of nanostructured solar cells and other devices

Effect of prevention measures on incidence of human listeriosis, France, 1987-1997.

To assess the impact of preventive measures by the food industry, we analyzed food monitoring data as well as trends in the incidence of listeriosis estimated through three independent sources: the National Reference Center of Listeriosis; a laboratory-based active surveillance network; and two consecutive nationwide surveys of public hospital laboratories. From 1987 to 1997, the incidence of listeriosis decreased by an estimated 68%. A substantial reduction in the proportion of Listeria monocytogenes-contaminated products was observed at the retail level. The temporal relationship between prevention measures by the food industry, reduction in L. monocytogenes-contaminated foodstuffs, and reduction in listeriosis incidence suggests a causal relationship and indicates that a substantial part of the reduction in illness is related to prevention efforts

Gravitational and axial anomalies for generalized Euclidean Taub-NUT metrics

The gravitational anomalies are investigated for generalized Euclidean Taub-NUT metrics which admit hidden symmetries analogous to the Runge-Lenz vector of the Kepler-type problem. In order to evaluate the axial anomalies, the index of the Dirac operator for these metrics with the APS boundary condition is computed. The role of the Killing-Yano tensors is discussed for these two types of quantum anomalies.Comment: 23 page