Edge Computing: Aplicaciones y desafíos actuales

The amount of data generated by sensors, actuators and other devices has substantially increased, in recent decades. Currently, the data is processed in the cloud, consequently, the network bandwidth and the latency of communications have become serious bottlenecks, which have driven a new computing paradigm, Edge Computing (EC), which aim to provide Internet-based services in close proximity to users by placing information technology infrastructures at the network´s edge in the form of small data centers, thus allowing to alleviate the burden of cloud processing. To provide an overview of edge computing, this article presents a study about this technology, including concepts, current scenario, architecture, application areas and current challenges; we hope that this document attracts the attention of the community and inspires more research in this direction.La cantidad de datos generados por sensores, actuadores y otros dispositivos ha aumentado, sustancialmente, en las últimas décadas. Actualmente, los datos son procesados en la nube, en consecuencia, el ancho de banda de la red y la latencia de las comunicaciones se convierten en serios cuellos de botella, lo que ha impulsado un nuevo paradigma informático, Edge Computing (EC), que tiene como objetivo proporcionar servicios basados en Internet en las proximidades de los usuarios al colocar las infraestructuras de tecnologías de la información en el borde de la red en formas de pequeños centros de datos, permitiendo de esta manera aliviar la carga de procesamiento en la cloud. Para proporcionar una visión general de Edge Computing, en este artículo se presenta un estudio sobre esta tecnología, incluyendo, conceptos, escenario actual, arquitectura, áreas de aplicaciones y desafíos actuales; esperamos que este documento atraiga la atención de la comunidad e inspire más investigaciones en esta dirección

Ozone–climate interactions and effects on solar ultraviolet radiation

This report assesses the effects of stratospheric ozone depletion and anticipated ozone recovery on the intensity of ultraviolet (UV) radiation at the Earth's surface. Interactions between changes in ozone and changes in climate, as well as their effects on UV radiation, are also considered. These evaluations focus mainly on new knowledge gained from research conducted during the last four years. Furthermore, drivers of changes in UV radiation other than ozone are discussed and their relative importance is assessed. The most important of these factors, namely clouds, aerosols and surface reflectivity, are related to changes in climate, and some of their effects on short- and long-term variations of UV radiation have already been identified from measurements. Finally, projected future developments in stratospheric ozone, climate, and other factors affecting UV radiation have been used to estimate changes in solar UV radiation from the present to the end of the 21st century. New instruments and methods have been assessed with respect to their ability to provide useful and accurate information for monitoring solar UV radiation at the Earth's surface and for determining relevant exposures of humans. Evidence since the last assessment reconfirms that systematic and accurate long-term measurements of UV radiation and stratospheric ozone are essential for assessing the effectiveness of the Montreal Protocol and its Amendments and adjustments. Finally, we have assessed aspects of UV radiation related to biological effects and human health, as well as implications for UV radiation from possible solar radiation management (geoengineering) methods to mitigate climate change

Developing an experimental setup for Thunder Bay waste pollution control plant (WPCP) to evaluate UV lamp performance

An automated experimental setup was developed to measure the spectral irradiance of new low pressure (LP) ultraviolet lamp (UV). The experimental analysis was performed by the measurement of the UV intensity along the length of the lamp to evaluate the variation in UV output during preliminary 5% lifespan of the UV lamp. The automation of the experimental setup has executed with the Arduino-LabVIEW interfaced computer program to maintain sequential collaboration among the setup components. The new LP UV lamp had a non-uniform output with the unexpected rise and drop in the UV intensity at certain locations along the length. The lamp showed predominant ageing signs at the electrode, which was confirmed by the visual observation after the appearance of the darken quartz sleeve near the electrode and further reduction in UV output was verified by the experimental analysis as a result of the obstructed transmittance of the UV radiation through the quartz sleeve. Initially, UV output of the new lamp was uniform; however, as the lamp was aged analysis noticed non-uniform output along the length of the lamp though the lamp was operated for same working conditions throughout the entire experimental phase. The non-uniform temperature profile of the UV lamp was studied with the implementation of the thermal imaging IR camera to confirm variable temperature gradient inside the quartz sleeve and at the surface of the quartz sleeve. The thermal analysis recognized the overheating of the lamp electrode. Further, as amp aged the temperature profile at the lamp electrode raised significantly. The experimental analysis proved that the lamp ageing was more noticeable at lamp ends than the middle part of the lamp, which was confirmed after evaluation of the UV intensity along the length of the lamp as well as after performing the output stability test at electrode for corresponding lamp operating cycle