Resource Management for Enhancing Predictability in Systems with Limited Processing Capabilities.

There is an increasing demand for computing systems composed by heterogeneous computers, connected by different types of networks, and that allow for accessing a wide range of services in a seamless way. Some of those computers are mobile or embedded and have limited resources, and can be overloaded when trying to handle their users demands. Then it is not possible to ensure a proper behaviour of the running applications. This can be an important problem when dealing with critical events in healthcare, home surveillance, or forest monitoring. Resource reservation is a valid basis for handling this issue. It allows for guaranteeing a certain resource share for applications that are important for the proper behavior of a given system. This paper describes an implementation of a resource management component and its integration in the Linux kernel. This piece of software has allowed to assign CPU budgets to standard Java threads, which is an important facility, given the widespread of this programming language. This implementation has been validated on service oriented middleware, where relevant services are executed by thread with guaranteed budget, to improve its predictability

Click to learn, learn to click: undergraduate synthetic organic chemistry experiments

The optimization of an undergraduate experiment for Organic Chemistry students is described to explore the concept of click chemistry. The preparation of a terminal fluorescent alkyne and an organic azide is reported consisting of simple steps. These are employed in the Cu(I)-catalized azide-alkyne cycloaddition to obtain a novel molecule containing a triazole ring whose characterization allows the students to practice a variety of techniques: NMR (1H, 13C, COSY and HSQC), melting point, thin layer chromatography, IR, fluorescence spectroscopy and mass spectrometry to confirm the structure of their obtained product. An alternative methodology in a one-pot reaction is also explored and a full laboratory manual provided.FQM-208. GlycoChemBio: Glycochemistry and Bioconjugatio

Relación de la balanza comercial peruana bilateral y las economías de Estados Unidos y China en el periodo 2009 – 2018

El presente trabajo de investigación tiene como objetivo general determinar la relación entre la balanza comercial peruana bilateral y las economías de Estados Unidos y China en el periodo 2009 - 2018. Por lo cual, la investigación es de carácter cuantitativa, aplicada, correlacional y longitudinal; siendo el marco poblacional los datos mensuales del Índice de Producción Industrial de Estados Unidos y China, también observaciones mensuales de la balanza comercial peruana bilateral, así como los tipos de cambio real sol – dólar y sol - yuan. Además, las fuentes de recolección de datos serán principalmente secundarias, y para realizar el procesamiento de estos y las pruebas pertinentes se hará uso del modelo de Vector Auto Regresivo. Los resultados de la investigación revelan que la evolución de la economía de Estados Unidos, representada por el índice de producción industrial del mismo, sí influye directamente en las exportaciones netas peruanas, ya que se determina una relación causal (en el sentido de Granger) positiva (prueba de impulso-respuesta), mientras que respecto a la evolución de la economía de China, se concluye que estadísticamente no hay evidencia significativa de una relación causal con las exportaciones netas peruanas, sin embargo, esto se debería a que solo se presentan valores positivos del índice de producción industrial chino a lo largo del periodo de estudio impidiendo observar una relación entre las variables

Profile of the Spatial Distribution Patterns of the Human and Bacteriophage Virome in a Wastewater Treatment Plant Located in the South of Spain

The authors would like to acknowledge the support given by the Institute of Water Research of University of Granada and the disposition of Municipal Water Company of Granada (EMASAGRA S.A.) for financial support to carry out the research.In wastewater treatment plants, most microbial characterization has focused on bacterial, archaeal, and fungal populations. Due to the difficult isolation, quantification, and identification of viruses, only a limited number of virome studies associated with wastewater treatment plants have been carried out. However, the virus populations play an important role in the microbial dynamics in wastewater treatment systems and the biosafety of effluents. In this work, the viral members present in influent wastewater, mixed liquor (aerobic bioreactor), excess sludge, and effluent water of a conventional activated sludge system for the treatment of urban wastewater were identified. Viral members were observed by transmission electron microscopy and studied through next-generation sequencing studies. The results showed the dominance of bacteriophages in the viral community in all samples, with the dominant viral phylotype classified as Escherichia coli O157 typing phage 7. Moreover, different human viruses, such as Cynomolgus cytomegalovirus and Gammaherpesvirus, were also detected.Institute of Water Research of University of Granad

Análisis de expansión de una microrred en una zona no interconectada

Context: The use of microgrids in non-interconnected areas has become the only alternative that people living in these regions have to access the electricity service. Because of this it is necessary to optimize the use of these systems and if it is possible to expand existing ones to increase coverage and, in that way, support the implementation of the sustainable development goal 7 set by United Nations:  Ensure access to affordable, reliable, sustainable and modern energy for all. Methodology: In this paper, we present two cases of expansion for a microgrid based on a photovoltaic generation system that is located in a non-interconnected area of Colombia. The analysis of the electrical generation of the system is carried out using Matlab/Simulink and the small signal analysis to evaluate the stability is executed in Neplan. Based on the above, it is possible to establish a methodology that allows to define the expandability of a microgrid. Results: From the small signal stability analysis performed in Neplan, the system's own values are obtained, both from the current microgrid and from the two cases of expansion, this in order to guarantee the property of stability in the micro grid in three different scenarios; non-linear loads, increased power demanded and generated. Conclusions: In photovoltaic systems located in non-interconnected areas and operating in island mode the inverters influence frequency stability considerably, because the reduced inertia in these systems leads to a faster frequency variation. This is why the analysis of small signal stability is the method indicated to study the behavior of microgrids before variations in demand and generated power, particularly in systems that operate in areas not interconnected, because with small disturbances it is possible to identify the changes in the dynamics of the system.Contexto: La utilizacion de microrredes en zonas no interconectadas se ha convertido en la unica alternativa que tiene las personas que habitan estas regiones para acceder al servicio de energía eléctrica. Debido a esto se hace necesariooptimizar la utilización de estos sistemas y en caso que sea posible expandir las ya existentes para aumentar la cobertura y de esta manera apoyar el cumplimiento del objetivo de desarrollo sostenible numero 7 planteado por las naciones unidas: Energía asequible y no contaminante. Metodología: En este artículo se presenta dos casos de expansión para una microrred basada en un sistema de generación fotovoltaica que se encuentra en una zona no interconectada de Colombia. Se realiza el análisis de generación eléctrica del sistema mediante Matlab/Simulink y el análisis de pequeña señal para verificar la estabilidad es ejecutado a través de Neplan. Con base en lo anterior se logra establecer una metodología que permite definir la capacidad de expansión de una microrred.   Resultados: A partir del análisis de estabilidad de pequeña señal realizado en Neplan se obtiene los valores propios del sistema, tanto de la microrred actual como de los dos casos de expansión, esto con el fin de garantizar la estabilidad en la microrred ante tres escenarios diferentes; cargas no lineales, aumento de potencia demandada y generada. Conclusiones: En los sistemas de generación solar fotovoltaica ubicados en zonas no interconectadas y operando en modo isla los inversores influyen en la estabilidad de frecuencia considerablemente, debido a que la reducida inercia en estos sistemas conduce a una variación más rápida de este parámetro. Es por esto por lo que el análisis de estabilidad de pequeña señal es el método indicado para estudiar el comportamiento de microrredes ante variaciones de potencia demanda y generada, particularmente en los sistemas que operan en las zonas no interconectadas, porque ante pequeñas perturbaciones es posible identificar los cambios en la dinámica del sistema

Diseño y construcción de un riel electromecánico para el estudio de la cinemática de imágenes con difuminación lineal uniforme

This paper presents the design and construction of an electromechanical slider that allows to obtain the instantaneous speed and acceleration of a platform that holds a scientific camera now of the capture of the image, for the study blurred images by uniform motion (Motion blur). The mechanical and electrical design requirements are presented based on the conditions of presentation of the phenomenon. Then, the system was calibrated with respect to a standard instrument for the estimation of uncertainties and errors. In this paper, the design, construction and calibration of an electromechanical system for the study of images with uniform motion blur is presented. The development of the system was divided into the following steps: electromechanical design for speed, speed calibration, electromechanical design for acceleration and the calibration of the acceleration. Maximum uncertainties of 0,031 / were obtained for speed and 0,029 /2 for acceleration of the system. The developed system corresponds to an electromechanical system that allows to move a cart along a pair of parallel bars, of low uncertainty with the possibility of measuring instantaneous speed and acceleration for the study of motion blurred images and teaching of motion physics.En este artículo se presenta el diseño y la construcción de un riel electromecánico que permite obtener la velocidad y aceleración instantáneas de una plataforma que soporta una cámara científica al momento de la captura de la imagen, para el estudio de las imágenes difuminadas por movimiento uniforme (Motion blur). Se presentan los requerimientos de diseño mecánico y eléctrico basados en las condiciones de presentación del fenómeno. Seguido, el sistema fue calibrado con respecto a un instrumento patrón para el cálculo de incertidumbres y error. En este artículo se presenta el diseño, construcción y calibración de un sistema electromecánico para el estudio de las imágenes con difuminación uniforme. El desarrollo del sistema se dividió en los siguientes pasos: diseño electromecánico para velocidad, calibración de la velocidad, diseño electromecánico para aceleración y calibración de la aceleración.Se obtuvieron incertidumbres máximas de 0,031 / para la velocidad y de 0,029 /2 para la aceleración del sistema. El sistema desarrollado corresponde a un sistema electromecánico que permite desplazar una plataforma con cámara a lo largo de un par de barras paralelas, de baja incertidumbre con la posibilidad de medir la velocidad y aceleración instantáneas para el estudio de imágenes reales con difuminadas por movimiento uniforme y la enseñanza de física básica

Hepcidin and Ferritin Levels in Fever of Unknown Origin: Is There a New Biomarker?

Background and objectives: Significantly elevated serum ferritin levels are associated with both iron overload and some inflammatory conditions. Hepcidin is a protein that interferes with iron absorption in inflammatory states and acts as an acute-phase reactant. Materials and methods: Here we report the case a 33-year-old patient who presented with high fever, skin lesions and arthralgia lasting for 2 weeks. His ferritin level was 13,800 µg/l and his hepcidin level was 61 ng/dl. Results: The final diagnosis was adult onset Still's disease. The condition evolved satisfactorily with steroid treatment, but after several weeks the patient presented with an unexpected recurrence. Conclusions: Hepcidin is a good inflammatory marker that could be useful in the differential diagnosis of hyperferritinaemia

Ulososides and urabosides - Triterpenoid saponins from the caribbean marine sponge Ectyoplasia ferox

ABSTARCT: Three new triterpene glycosides, named ulososide F (1), urabosides A (2) and B (3), together with the previously reported ulososide A (4), were isolated from the Caribbean marine sponge Ectyoplasia ferox. Their structures were elucidated using extensive interpretation of 1D and 2D-NMR data, as well as HRESIMS. The aglycon of all compounds is a rare 30-norlonastane and the sugar residues were identified after acid hydrolysis and GC analyses. Cytotoxicities of the isolated compounds were evaluated against Jurkat and CHO cell lines by a MTT in vitro assay as well as a hemolysis assay. Unexpectedly, all these saponin derivatives showed very low activity in our bioassays