Energy-Efficient Thermal-Aware Scheduling for RT Tasks Using TCPN

This work leverages TCPNs to design an energy-efficient, thermal-aware real-time scheduler for a multiprocessor system that normally runs in a low state energy at maximum system utilization but its capable of increasing the clock frequency to serve aperiodic tasks, optimizing energy, and honoring temporal and thermal constraints. An off-line stage computes the minimum frequency required to run the periodic tasks at maximum CPU utilization, the proportion of each task''s job to be run on each CPU, the maximum clock frequency that keeps temperature under a limit, and the available cycles (slack) with respect to the system with minimum frequency. Then, a Zero-Laxity online scheduler dispatches the periodic tasks according to the offline calculation. Upon the arrival of aperiodic tasks, it increases clock frequency in such a way that all periodic and aperiodic tasks are properly executed. Thermal and temporal requirements are always guaranteed, and energy consumption is minimized

Uveítis y glaucoma asociados a infección por Hepatozoon canis : reporte de un caso

ABSTRACT: We report the case of a five years old German Shepherd dog, who presented anterior uveitis in his left eye which then led him to glaucoma and corneal ulcer. Clinical examination found a patient with low body condition, muscle weakness, dull and brittle coat, and unspecific symptomatology. During both the cell blood count (CBC) and blood smears, gamonts of Hepatozoon canis were found in blood and aqueous humor. Diagnosis, treatment and progress are reported.RESUMEN: Se expone el caso de un perro Pastor Alemán de cinco años y medio de edad, el cual presentó uveítis anterior en ojo izquierdo que luego le condujo a glaucoma y úlcera corneal. En el examen clínico se encontró un paciente con baja condición corporal, debilidad muscular, además de un pelaje opaco y quebradizo, con sintomatología inespecífica. Tanto en el hemograma como en los extendidos sanguíneos se encontraron gamontes de Hepatozoon canis en sangre y humor acuoso. Se discute su diagnóstico, tratamiento y evolución

A flexible framework for real-time thermal-aware schedulers using timed continuous petri nets

This work presents TCPN-ThermalSim, a software tool for testing Real-Time Thermal-Aware Schedulers1. This framework consists of four main modules. The first one helps the user to define the problem: Task set with periods, deadlines and worst case execution times in CPU cycles, along with the CPU characteristics, temperature and energy consumption. The second module is the Kernel simulation, which builds up a global simulation model according to the configuration module. In the third module, the user selects the scheduler algorithm. Finally the last module allows the execution of the simulation and present the results. The framework encompasses two modes: Manual and automatic. In manual mode the simulator uses the task set data provided in the first section. In automatic mode the task set is generated by parameterizing the integrated UUniFast algorithm

In situ surface coverage analysis of RuO₂-catalysed HCl oxidation reveals the entropic origin of compensation in heterogeneous catalysis

In heterogeneous catalysis, rates with Arrhenius-like temperature dependence are ubiquitous. Compensation phenomena, which arise from the linear correlation between the apparent activation energy and the logarithm of the apparent pre-exponential factor, are also common. Here, we study the origin of compensation and find a similar dependence on the rate-limiting surface coverage term for each Arrhenius parameter. This result is derived from an experimental determination of the surface coverage of oxygen and chlorine species using temporal analysis of products and prompt gamma activation analysis during HCl oxidation to Cl2 on a RuO2 catalyst. It is also substantiated by theory. We find that compensation phenomena appear when the effect on the apparent activation energy caused by changes in surface coverage is balanced out by the entropic configuration contributions of the surface. This result sets a new paradigm in understanding the interplay of compensation effects with the kinetics of heterogeneously catalysed processes

Thermal-aware real-time scheduling using timed continuous Petri Nets

We present a thermal-aware, hard real-time (HRT) global scheduler for a multiprocessor system designed upon three novel techinques. First, we present a modeling methodology based on Timed Continuous Petri nets (TCPN) that yields a complete state variable model, including job arrivals, CPU usage, power, and thermal behavior. The model is accurate and avoids the calibration stage of RC thermal models. Second, based on this model, a linear programming problem (LPP) determines the existence of a feasible HRT thermal-aware schedule. Last, a sliding-mode controller and an online discretization algorithm implement the global HRT scheduler, which is capable of managing thermal constraints, context switching, migrations, and disturbances

Effect of Defoliation Frequency and Planting Density on Yield and Nutritive Value of \u3ci\u3eCoursetia ferruginea\u3c/i\u3e (HBK) Lavin

The aim of the present study was to asses the influence of the frequency of defoliation and density of sowing on yield and nutritive value of Coursetia ferruginea. Three defoliation frequencies (6, 8 and 10 weeks) and three densities of planting (1 x 1 m, 1 x 1.5 m and 1 x 2 m) were evaluated. A randomized block design, in a split plot arrangement and four repetitions, was used. Frequency of defoliation has a strong significant (P\u3c 0.01) effect on dry matter (DM) yield (13.6, 18.1 and 27.8 g DM/plant for 6, 8 and 10-week defoliation frequencies), plant height (63.5, 76.6 and 101.2 cm) and plant survival (71, 74 and 86%). Nutritive value was significantly (P\u3c 0.05) affected by the frequency of defoliation. Mineral content was reduced as the defoliation interval increased. Density of planting did not affect (P\u3e 0.05) any of the variables. It is concluded that, C. ferruginea is a forage shrub with potential to improve animal feed quality, but it does not stand frequent defoliation

Measuring online teaching service quality in higher education in the COVID-19 environment

The use of the Internet to develop new technologies has generated a considerable change in teaching and student learning in higher education. The pandemic caused by COVID-19 has forced universities to switch from face-to-face to online instruction. Furthermore, this transfer process was planned and executed quickly, with urgent redesigns of courses originally conceived for live teaching. The aim of this work is to measure the service quality of online teaching delivered during the COVID- 19 period. The methodology was based on an importance-performance analysis using a structural equations model. The data were obtained from a sample of 467 students attending a university in southern Spain. The results reveal five priority attributes of online teaching that need to be improved in order to enhance the service quality of the virtual instruction provided to students. Universities need to redefine their online format by integrating methodological and technological decisions and involving collaboration between teachers, students and administration staff and services. The results do not apply to educational institutions that exclusively teach courses online, but to those institutions that had to rapidly adapt, and shift course material originally designed for face-to-face training

The decay b→sγb\to s\gamma in the presence of a constant antisymmetric tensor field

A constant antisymmetric 2-tensor can arise in general relativity with spontaneous symmetry breaking or in field theories formulated in a noncommutative space-time. In this work, the one-loop contribution of a nonstandard $WW\gamma$ vertex on the flavor violating quark transition $q_i\to q_j\gamma$ is studied in the context of the electroweak Yang-Mills sector extended with a Lorentz-violating constant 2-tensor. An exact analytical expression for the on shell case is presented. It is found that the loop amplitude is gauge independent, electromagnetic gauge invariant, and free of ultraviolet divergences. The dipolar contribution to the $b\to s\gamma$ transition together with the experimental data on the $B\to X_s\gamma$ decay is used to derive the constraint $\Lambda_{LV}>1.96$ TeV on the Lorentz-violating scale.Comment: 14 pages and 2 figure

Disponibilidad hídrica bajo escenarios de cambio climático en el Valle de Galeana, Nuevo León, México

López-García, T. G., Manzano, M. G., & Ramírez, A. I. (enero-febrero, 2017). Disponibilidad hídrica bajo escenarios de cambio climático en el Valle de Galeana, Nuevo León, México. Tecnología y Ciencias del Agua, 8(1), 105-114. Se realizó una modelación con el programa WEAP para determinar el impacto de los escenarios de cambio climático RCP 4.5 y 8.5 en los recursos hídricos en el periodo 2015- 2030 en el Valle de Galeana, Nuevo León. Se desarrollaron dos escenarios de adaptación: el primero considera una reducción en la demanda hídrica para uso agrícola por cambio de sistemas de riego gradual; el segundo contempla un plan hídrico integral para mejorar la capacidad de infiltración de la zona de recarga mediante programas de reforestación y recuperación de suelos. Los resultados muestran que la situación del acuífero con escenarios de cambio climático y con el uso actual del agua es crítica, pues en ambos escenarios se tendrían afectaciones importantes en el acuífero a partir de 2015, ocurriendo un mínima recarga hacia el acuífero de 0.96 y 1.5% con respecto a su capacidad total durante los meses de lluvia típicos (agosto y septiembre, respectivamente). Considerando el escenario de adaptación de cambio en sistemas de riego, se espera una ligera recuperación a partir del año 2023, alcanzando un máximo de recarga de 3.11 Mm3 en temporada de lluvia. Los resultados del plan hídrico integral, si bien no mantienen una recarga constante y positiva, sí muestran un volumen de recuperación de 27 Mm3 , lo que representa 18.75% de la capacidad máxima de almacenamiento en el sistema; sin embargo, éste disminuye para el mes de diciembre, por lo que no es posible basar el desarrollo de la agricultura en las comunidades de la región con prácticas de alto consumo de agua

La lógica difusa como un medio para identificar y valorar las alteraciones de conducta en niños a nivel de educación básica: primaria y secundaria

Esta investigación toma como referencia la problemática económica, educativa y social de los niños con trastornos de conducta –niños problema- y justifica la aplicación de la lógica difusa como una técnica de ingeniería para optimizar la identificación oportuna y eficaz de los trastornos del comportamiento en niños y adolescentes. Muestra cómo adquirir y analizar datos ambiguos, vagos y llenos de incertidumbre provenientes de las variables de entrada para conseguir resultados de valoración precisos de cada una de las tipologías presentadas por los niños con problemas de conducta. Los trastornos del comportamiento analizados en este trabajo son: Hiperactividad (H), Déficit de Atención con Hiperactividad (DAH), Trastorno de conducta (TC) y Déficit de Atención (DA).Palabra(s) Clave(s): déficit de atención, hiperactividad, lógica difusa, trastorno de conducta