Combined heat and power and consumption optimization in a SCADA-based system

The operation of power systems in a Smart Grid (SG) context brings new opportunities to consumers as active players, in order to fully reach the SG advantages. In this context, concepts as smart homes or smart buildings are promising approaches to perform the optimization of the consumption, while reducing the electricity costs. This paper proposes an intelligent methodology to support the consumption optimization of an industrial consumer, which has a Combined Heat and Power (CHP) facility. A SCADA (Supervisory Control and Data Acquisition) system developed by the authors is used to support the implementation of the proposed methodology. An optimization algorithm implemented in the system in order to perform the determination of the optimal consumption and CHP levels in each instant, according to the Demand Response (DR) opportunities. The paper includes a case study with several scenarios of consumption and heat demand in the context of a DR event which specifies a maximum demand level for the consumer.

Training control centers' operators in incident diagnosis and power restoration using intelligent tutoring systems

The activity of Control Center operators is important to guarantee the effective performance of Power Systems. Operators’ actions are crucial to deal with incidents, especially severe faults like blackouts. In this paper, we present an Intelligent Tutoring approach for training Portuguese Control Center operators in tasks like incident analysis and diagnosis, and service restoration of Power Systems. Intelligent Tutoring System (ITS) approach is used in the training of the operators, having into account context awareness and the unobtrusive integration in the working environment. Several Artificial Intelligence techniques were criteriously used and combined together to obtain an effective Intelligent Tutoring environment, namely Multiagent Systems, Neural Networks, Constraint-based Modeling, Intelligent Planning, Knowledge Representation, Expert Systems, User Modeling, and Intelligent User Interfaces.

Simulation model for driving dynamics, energy use and power supply

Dissertação para obtenção do grau de Mestre em Engenharia Electrotécnica Ramo de Energia

Optimal dividend strategies for a compound Poisson risk process under transaction costs and power utility

We characterize the value function of maximizing the total discounted utility of dividend payments for a compound Poisson insurance risk model when strictly positive transaction costs are included, leading to an impulse control problem. We illustrate that well known simple strategies can be optimal in the case of exponential claim amounts. Finally we develop a numerical procedure to deal with general claim amount distributions.

Effects of computer-mediated communication and face-to-face communication on the quantity and quality of discourse produced by English as a second language students /

The effects oftwo types of small-group communication, synchronous computer-mediated and face-to-face, on the quantity and quality of verbal output were con^ared. Quantity was deiSned as the number of turns taken per minute, the number of Analysis-of-Speech units (AS-units) produced per minute, and the number ofwords produced per minute. Quality was defined as the number of words produced per AS-unit. In addition, the interaction of gender and type of communication was explored for any differences that existed in the output produced. Questionnaires were also given to participants to determine attitudes toward computer-mediated and face-to-face communication. Thirty intermediate-level students fi-om the Intensive English Language Program (lELP) at Brock University participated in the study, including 15 females and 15 males. Nonparametric tests, including the Wilcoxon matched-pairs test, Mann-Whitney U test, and Friedman test were used to test for significance at the p < .05 level. No significant differences were found in the effects of computer-mediated and face-to-face communication on the output produced during follow-up speaking sessions. However, the quantity and quality of interaction was significantly higher during face-to-face sessions than computer-mediated sessions. No significant differences were found in the output produced by males and females in these 2 conditions. While participants felt that the use of computer-mediated communication may aid in the development of certain language skills, they generally preferred face-to-face communication. These results differed fi-om previous studies that found a greater quantity and quality of output in addition to a greater equality of interaction produced during computer-mediated sessions in comparison to face-to-face sessions (Kern, 1995; Warschauer, 1996).

Communication and Economic Growth.

Overs the past millennium, each of the three centuries of most rapid demographic growth in the West Coincided with the diffusion of a new communications technology. This paper examines the hypothesis of Harold Innis (1894-1952) that there is two-way feeback between such innovations and economic growth.

Computer-mediated communication and time pressure induce higher cardiovascular responses in the preparatory and execution phases of cooperative tasks

Resumen tomado de la publicaci??n

Social Media Analytics: Trust and Power

In this lecture for a second year interdisciplinary course (part of the curriculum innovation programme) We explore the scope of social media analytics and look at two aspects in depth: Analysing for influence (looking at factors such as network structure, propagation of content and interaction), and analysing for trust (looking at different methods including policy, provenance and reputation - both local and global). The lecture notes include a number of short videos, which cannot be included here for copy-write reasons.

C. Wright Mils revisited: Society and Power

C. Wright Mills has been forgotten by sociological theories however there is no doubt about how much he contributed to the field of Epistemology. He successfully participated in the American Sociology of Knowledge and, at the same time, he  upheld the tradition of the Conflict Theory, including the sociological dimension into one of the most questioned political subjects of his period. Undoubtedly,  Wright Mills was morally committed to the value of reason and freedom. His central issue was to analyse the real possibilities for a particular individual within  a particular social order to become a free man capable of reasoning. He wondered how someone could be able to transcend his daily nature through reason and  experience and to act accordingly to his power. The power and political processes were constant in his works, since he claimed that any political process was a  struggle for power and prestige, for authoritative positions, both within each nation  and among the different states. On the other hand, he  bserved that the social  structure in the United States of America was not completely democratic, since the  course of action depended on the decision of a small group of wealthy, powerful individuals. These concentrating spaces of power amongst some economic, military  and political corporations were supported by their underlying ideology, a fact that became clearer when referring to international affairs. Nowadays, in a world of  structural antagonisms, wars and rebellions, the need for looking at the work  of intellectuals like Mills re-emerges. Mills showed us a way in which a complex entity as power can be understood, and, at the same time, the need to consider the  course of history, its mechanics and process.

Melancholy and power, knowledge and propaganda : discussing the contribution of the bologna process to higher education research in Europe. 'Melancolía y poder, conocimiento y propaganda : discutiendo la contribución del proceso de Bolonia sobre la investigación en enseñanza superior en Europa'.

Resumen tomado de la publicación. Monográfico con el título: El proceso de Bolonia : dinámicas y desafíos de la enseñanza superior en Europa a comienzos de una nueva época

World Englishes : implications for international communication and English language teaching.

El modelo del idioma inglés que se debe utilizar en las aulas ha sido durante mucho tiempo un tema de debate. Este texto describe las variedades mundiales de lengua inglesa, y discute las ventajas y desventajas de seleccionar una variedad determinada como segunda lengua desde el punto de vista de profesores y alumnos. Examina y evalúa nuevos conceptos tales como 'estándar', 'variedad', 'nativo' y 'hablante no nativo', para validar el papel desempeñado por los profesores de inglés multilingüe y multicultural, con el argumento de que las necesidades del contexto y el alumno deben determinar la variedad que se les enseñe. Viene acompañado de un CD de audio.

developing pre-school communication and language.

Manual sobre cómo desarrollar las habilidades del lenguaje y la comunicación de los niños en sus primeros años incluso con aquellos con necesidades educativas especiales. Proporciona orientación sobre las expectativas apropiadas para cada grupo de edad desde el nacimiento hasta los cinco años. Incluye para los profesionales estudio de casos, estrategias e ideas prácticas y un CD-ROM con material fotocopiable.

The light representation of religion and power in sound

The thematic and anathematic in music-making a reflection occurring after listening to an art song and a pop song from the 19th and 20th century Levantine music. Bach’s Orchestral Suites keep popping up, elegantly unveiling “the truth”.