Applications of the duality method to generalizations of the Jordan canonical form

The Jordan normal form for a matrix over an arbitrary field and the canonical form for a pair of matrices under contragredient equivalence are derived using Ptak's duality method.Comment: 6 page

A Software Radio Challenge Accelerating Education and Innovation in Wireless Communications

This Innovative Practice Full Paper presents our methodology and tools for introducing competition in the electrical engineering curriculum to accelerate education and innovation in wireless communications. Software radio or software-defined radio (SDR) enables wireless technology, systems and standards education where the student acts as the radio developer or engineer. This is still a huge endeavor because of the complexity of current wireless systems and the diverse student backgrounds. We suggest creating a competition among student teams to potentiate creativity while leveraging the SDR development methodology and open-source tools to facilitate cooperation. The proposed student challenge follows the European UEFA Champions League format, which includes a qualification phase followed by the elimination round or playoffs. The students are tasked to build an SDR transmitter and receiver following the guidelines of the long-term evolution standard. The metric is system performance. After completing this course, the students will be able to (1) analyze alternative radio design options and argue about their benefits and drawbacks and (2) contribute to the evolution of wireless standards. We discuss our experiences and lessons learned with particular focus on the suitability of the proposed teaching and evaluation methodology and conclude that competition in the electrical engineering classroom can spur innovation.Comment: Frontiers in Education 2018 (FIE 2018

Teaching telecommunication standards: bridging the gap between theory and practice

©2017 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.Telecommunication standards have become a reliable mechanism to strengthen collaboration between industry and research institutions to accelerate the evolution of communications systems. Standards are needed to enable cooperation while promoting competition. Within the framework of a standard, the companies involved in the standardization process contribute and agree on appropriate technical specifications to ensure diversity and compatibility, and facilitate worldwide commercial deployment and evolution. Those parts of the system that can create competitive advantages are intentionally left open in the specifications. Such specifications are extensive, complex, and minimalistic. This makes telecommunication standards education a difficult endeavor, but it is much demanded by industry and governments to spur economic growth. This article describes a methodology for teaching wireless communications standards. We define our methodology around six learning stages that assimilate the standardization process and identify key learning objectives for each. Enabled by software-defined radio technology, we describe a practical learning environment that facilitates developing many of the needed technical and soft skills without the inherent difficulty and cost associated with radio frequency components and regulation. Using only open source software and commercial of-the-shelf computers, this environment is portable and can easily be recreated at other educational institutions and adapted to their educational needs and constraints. We discuss our and our students' experiences when employing the proposed methodology to 4G LTE standard education at Barcelona Tech.Peer ReviewedPostprint (author's final draft

Todavía no entendemos a Paul K. Feyerabend

Lo que intentaré ahora es simplemente mostrar esta, por decir así, falta de adecuación entre algunas interpretaciones autorizadas y textos o inquietudes del mismo Feyerabend que permitirían vislumbrar la necesidad de ampliar el horizonte de comprensión. Para ello, luego de descartar algunos malos entendidos, compararé algunas discusiones de intérpretes autorizados con textos de Feyerabend. Procuro de ese modo ilustrar cómo esos puntos de arribo especulativos de nuestro autor no son todavía abarcados por la bibliografia, favoreciendo así que se vean dos etapas en su pensamiento -incluso 'dos Feyerabend'- sin dar razón de su intima conexión. Por lo demás, consciente de que demostrar la unidad de ·su pensamiento es tarea que excede el propósito de estas páginas, sólo concluiré con la sugerencia de que esa unidad o 'Feyerabend total' debería ser la clave desde la que se aborde su comprensión. Por tanto, si la tesis se hubiera vuelto plausible, se concluiría que a Feyerabend habría de leérselo desde las últimas obras hacia atrás; pues lo anterior no es más que un caminar, como a ciegas, sin entender plenamente las consecuencias de lo que se va hallando

Una contribución para la comprensión del nacimiento del representacionalismo

El debate acerca del significado y del fin de la Ciencia se ha desarrollado recientemente en el ámbito de la Filosofía de la Ciencia. Uno de los temas más discutidos es la interpretación del representacionalismo en la concepción clásica de la ciencia (p. e., Rorty y Putnam). Las posibilidades de superar el representaciones dependes de su comprensión. En este trabajo se considera un aspecto del representacionalismo modernos: el modo de explicar la ciencia introducido por aristotélicos y tomistas en la Segunda Escolástica (XV – XVI), con especial mención de Cayetano. Este modo está presenta en el origen del representacionalismo.The debate about the meaning and scope of Science has been recently growing in the field of the Philosophy of Science. One of the most discused topics is the interpretation of representationism in the classical conceptions of science (e.g., Rorty and Putnam). The possibilities of overcoming representationism depend on it’s understanding. In this paper a scarcely considered aspect of modern representationism is shown, i.e., the way of explaining science introduced by Aristotelians and Thomist of the Second Scholasticism (XV and XVI) –special mention to Cayetano. This way is present at the origin of representationism.Fil: Gelonch Villarino, Santiago. Universidad Nacional de Cuyo. Facultad de Filosofía y Letra

Creating Tailored and Adaptive Network Services with the Open Orchestration C-RAN Framework

Next generation wireless communications networks will leverage software-defined radio and networking technologies, combined with cloud and fog computing. A pool of resources can then be dynamically allocated to create personalized network services (NSs). The enabling technologies are abstraction, virtualization and consolidation of resources, automatization of processes, and programmatic provisioning and orchestration. ETSI's network functions virtualization (NFV) management and orchestration (MANO) framework provides the architecture and specifications of the management layers. We introduce OOCRAN, an open-source software framework and testbed that extends existing NFV management solutions by incorporating the radio communications layers. This paper presents OOCRAN and illustrates how it monitors and manages the pool of resources for creating tailored NSs. OOCRAN can automate NS reconfiguration, but also facilitates user control. We demonstrate the dynamic deployment of cellular NSs and discuss the challenges of dynamically creating and managing tailored NSs on shared infrastructure.Comment: IEEE 5G World Forum 201