The paper initiates a comprehensive conceptual framework for an integrated simulation environment for unmanned autonomous systems (UAS) that is capable of supporting the design, analysis, testing, and evaluation from a "system of systems" perspective. The paper also investigates the current state of the art of modeling and performance assessment of UAS and their components and identifies directions for future developments. All the components of a comprehensive simulation environment focused on the testing and evaluation of UAS are identified and defined through detailed analysis of current and future required capabilities and performance. The generality and completeness of the simulation environment is ensured by including all operational domains, types of agents, external systems, missions, and interactions between components. The conceptual framework for the simulation environment is formulated with flexibility, modularity, generality, and portability as key objectives. The development of the conceptual framework for the UAS simulation reveals important aspects related to the mechanisms and interactions that determine specific UAS characteristics including complexity, adaptability, synergy, and high impact of artificial and human intelligence on system performance and effectiveness.

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<p><strong></strong>En este artículo se reconstruyen historias de vida de dos activistas que se iniciaron en los movimientos sociales, como uno de los efectos del movimiento estudiantil de 1968. A través de la utilización de las categorías: resonancias históricas y biográficas del activismo, como unidades de análisis, establecemos un proceso de comparación de historias de vida con perspectiva de género. Destacamos la noción de disponibilidad personal (<em>personal availability</em>) propuesta por McAdam (1988), por medio de la definición de etapas históricas, derivadas de las principales luchas sociales del país, donde las activistas participaron, se formaron como líderes y cuadros políticos intermedios, influyendo en sus organizaciones y los movimientos donde participaron. Las resonancias biográficas de su activismo les permitieron reclutar a otros(as) participantes, influir en sus visiones del mundo, inspirar nuevas estrategias de resistencia y contribuir al impacto de otros(as) activistas en su lucha.</p><p> </p>

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In the aerospace industry, engineers rely on fast, accurate results from simulation environments to design and develop ever more complex systems in shorter development times. An integrated approach for the development of complex aerospace systems is presented. This commercial off-the-shelf solution provides tooling to simplify the consolidation of collaborative efforts from diverse research, development, and test groups in the implementation of sophisticated simulation models. The software described in this paper is based in the MATLAB® and Simulink® products and intended to increase the efficiency of the workflow when several teams or individuals are involved. This is achieved through a unified graphical user interface in which the project manager and members of the development team can componentize the different aspects of the project model and assign tasks and files to specific teams or engineers. To better illustrate the scope of this technique, a case study for a complex aerospace model is provided based on the HL-20 personnel launch system.