Visual Localisation of Mobile Devices in an Indoor Environment under Network Delay Conditions

Current progresses in home automation and service robotic environment have highlighted the need to develop interoperability mechanisms that allow a standard communication between the two systems. During the development of the DHCompliant protocol, the problem of locating mobile devices in an indoor environment has been investigated. The communication of the device with the location service has been carried out to study the time delay that web services offer in front of the sockets. The importance of obtaining data from real-time location systems portends that a basic tool for interoperability, such as web services, can be ineffective in this scenario because of the delays added in the invocation of services. This paper is focused on introducing a web service to resolve a coordinates request without any significant delay in comparison with the sockets

Review of Display Technologies Focusing on Power Consumption

Producción CientíficaThis paper provides an overview of the main manufacturing technologies of displays, focusing on those with low and ultra-low levels of power consumption, which make them suitable for current societal needs. Considering the typified value obtained from the manufacturer’s specifications, four technologies—Liquid Crystal Displays, electronic paper, Organic Light-Emitting Display and Electroluminescent Displays—were selected in a first iteration. For each of them, several features, including size and brightness, were assessed in order to ascertain possible proportional relationships with the rate of consumption. To normalize the comparison between different display types, relative units such as the surface power density and the display frontal intensity efficiency were proposed. Organic light-emitting display had the best results in terms of power density for small display sizes. For larger sizes, it performs less satisfactorily than Liquid Crystal Displays in terms of energy efficiency.Junta de Castilla y León (Programa de apoyo a proyectos de investigación-Ref. VA036U14)Junta de Castilla y León (programa de apoyo a proyectos de investigación - Ref. VA013A12-2)Ministerio de Economía, Industria y Competitividad (Grant DPI2014-56500-R

Ambiente inflamatorio en pacientes con COVID-19: Revisión sistemática

The SARS-CoV-2 virus is the main cause of the pandemic viral pneumonia known as COVID-19. Some studies suggest that, in this disease, lymphopenia is the most common sign of infection, as well as increased CRP and IL-6 caused by a cytokine storm directed at the lungs. Therefore, the hypothesis of the study is to make a systematic revision of scientific studies linked to the immunological phenomenon known as COVID-19. Objectives: The main aim is to study the cytokine storm of COVID-19, as well as to determine the role of IL-6 and T-lymphocytes. Methods: A search strategy was made through the PICOS questions, based on the PRISMA method. The MeSH terms were looked up on PubMed, Google Scholar and SciELO (2019-2021). The level of quality was sought according to the ranking of Scimago institutions, and the H index of the journals was assessed. Results: 43 articles were included, and clinic, diagnosis, treatment, and pathogenesis were compared. A decrease in TCD4 / CD8 lymphocytes was shown in patients with severe disease, as well as an increase in IL-6 and CRP. Conclusions: The immunological phenomenon known as COVID-19 is characterized by lymphopenia and an increase in IL-6 amongst critically ill patients. Monitoring those parameters could help to understand the progression of the COVID-19 disease.El virus SARS-CoV-2 es el responsable de la neumonía viral pandémica conocida como COVID-19. Algunos estudios sugieren que, en esta enfermedad, la linfopenia sea el signo más común de infección, así como el aumento de PCR e IL-6 provocado por una tormenta de citocinas dirigida a los pulmones. Por ello, la hipótesis del trabajo es realizar una revisión sistemática de los estudios científicos relativos al fenómeno inmunológico de la COVID-19. Objetivos: El objetivo principal es estudiar la tormenta de citocinas de la COVID-19, así como determinar el rol de la IL-6 y los linfocitos T. Métodos: Se elaboró la estrategia de búsqueda a través de la pregunta PICOS en base al método PRISMA. Los términos MeSH se buscaron en PubMed, Google Scholar y SciELO (2019-2021). Se buscó el nivel de calidad según la clasificación de instituciones de Scimago, y se valoró el índice H de las revistas. Resultados: Se incluyeron 43 artículos y se compararon clínica, diagnóstico, tratamiento y patogenia. Se mostró una disminución de los linfocitos TCD4/CD8 en pacientes con enfermedad grave y un aumento de IL-6 y PCR. Conclusiones: El fenómeno inmunológico de la COVID-19 se caracteriza por linfopenia y aumento de IL-6 en pacientes críticamente enfermos. La monitorización de estos parámetros podría ayudar a entender la progresión de la enfermedad COVID-19.Ciencias Experimentale

Consideraciones sobre el montaje de conectores para optimizar su respuesta en bandas milimétricas

Connectors are essential in many circuits to communicate with exterior world. When working in millimeter wave frequencies, connectors require very tight tolerances and being mounted exactly in the correct way. Main problems which use to appear when working with millimeter wave connectors have been collected in this article. Besides that, some basic guidelines to get optimal connector performance are given. To illustrate how these advices can improve connector operation, they have been used in a real case

Detector de banda ultraancha en tecnología microstrip hasta 40 GHz

Detectors designing is a key aspect for the development of the new millimeter wave systems. In this paper two detectors in microstrip technology are presented. They use zero bias Schottky diodes to detect signals from low frequency to 40 GHz. High sensibility, flat frequency response and ultrabroadband are the main features of these designs. They are also cheap and easy to mount because they have been built using microstrip technology. This paper explains most technological questions which must be taken into account to design such detectors

Introducción

Desde hace un cuarto de siglo se está recuperando una tradición eclipsada, pero nunca del todo olvidada, la conciencia de que a lo largo de nuestra historia las cuevas y soledades habían sido, en muchas ocasiones, habitadas por «hombres de Dios» . El hecho está documentado en casos como San Millán de la Cogolla, cuya vida nos habla claro al respecto y en otros como el monasterio de San Martín de Albelda, que nunca perdió la imagen rupestre todavía hoy bien visible en el lugar. El resto de los lugares con cuevas se había ido desdibujando hasta que lentamente han ido apareciendo primero la cueva del «Patio de los Curas» de Arnedo con epigrafía del siglo V, que sin vacilación posible ha sido identificada como iglesia, luego ya con la conciencia atenta, el monasterio rupestre de San Miguel de Arnedo; así como los complejos rupestres del alto Ebro 3 , los entornos del Condado de Treviño y otros puntos de las provincias vascas4 . Los estudiosos se han dado cuenta de que San Tirso de Arnedillo es una ermita en una cueva, de tal suerte que ya cuando los indicios son claros, y lo son en muchos casos, no se discute que aquellas cuevas que cuentan con ellos hayan sido sedes de viviendas monásticas

Decision system based on neural networks to optimize the energy efficiency of a petrochemical plant

The energy efficiency of industrial plants is an important issue in any type of business but particularly in the chemical industry. Not only is it important in order to reduce costs, but also it is necessary even more as a means of reducing the amount of fuel that gets wasted, thereby improving productivity, ensuring better product quality, and generally increasing profits. This article describes a decision system developed for optimizing the energy efficiency of a petrochemical plant. The system has been developed after a data mining process of the parameters registered in the past. The designed system carries out an optimization process of the energy efficiency of the plant based on a combined algorithm that uses the following for obtaining a solution: On the one hand, the energy efficiency of the operation points occurred in the past and, on the other hand, a module of two neural networks to obtain new interpolated operation points. Besides, the work includes a previous discriminant analysis of the variables of the plant in order to select the parameters most important in the plant and to study the behavior of the energy efficiency index. This study also helped ensure an optimal training of the neural networks. The robustness of the system as well as its satisfactory results in the testing process (an average rise in the energy efficiency of around 7%, reaching, in some cases, up to 45%) have encouraged a consulting company (ALIATIS) to implement and to integrate the decision system as a pilot software in an SCADA

Circuitos equivalentes en bandas milimétricas

The use of ideal equivalent circuits which represent the electrical response of a physical device is a very common practice in microwave and millimeter wave circuit design. However, these equivalent circuit models only get accurate results in a certain frequency range. In this document, some basic devices have been analyzed, with several equivalent circuit models for each one. Physical devices have been manufactured and measured, and measurements have been compared with the responses obtained from the equivalent models. From this comparison, it?s possible to see what equivalent models are more advisable in each case and which are their limitations