Usability is a highly desired but often ignored software quality. Effective user interfaces tend to increase learnability, effectiveness and user satisfaction. But usability is often neglected in the early stages of software development and is thus frequently not address in a system's architectural design. Furthermore, because usability is often neglected or deferred, it is difficult to estimate the effort specifically spent on adding or improving usability mechanisms in the software architecture and in code. In this work, we present a case study where we analyze the impact of introducing a variety of usability mechanisms to a mobile application and we report on the architectural changes that must be made in the software architecture to accommodate them. We also report on the additional code required to implement these usability mechanisms and we investigate the users' satisfaction of combining and using several usability mechanisms in a mobile application. Finally, we evaluated user responses—both positive and negatives—to these usability mechanisms via a questionnaire involving 25 users from different roles and different organizations and including contextual interviews to analyze the qualitative responses of the subjects. Our results show that apart from the relatively modest modeling and coding effort, the combination of several usability mechanisms seems beneficial for users of mobile systems and increases the satisfaction during the interaction with the system.
Resumen El estallido de la burbuja inmobiliaria en España ha sacado a la luz todas las contradicciones y debilidades de un modelo que había sido calificado como ejemplar y que aún se pretende imitar en muchos países. La paradoja de un stock sobredimensionado de viviendas conviviendo con una gran demanda insatisfecha; el hundimiento de un sistema financiero volcado en una burbuja especulativa; la avalancha de desahucios, con cientos de miles de familias que pierden sus viviendas; o el fracaso de la promesa de promoción social asociada a la propiedad de la vivienda, son algunas de las consecuencias de este colapso.
RESUMENLa movilización de ingentes recursos energéticos y materiales ha permitido la integración económica de territorios remotos, previamente autónomos y relativamente autosuficientes. Los modelos tradicionales de análisis del territorio en función de los recursos locales han dejado de ser eficaces para describir la nueva realidad. En la actualidad los territorios han pasado a estar al servicio de un sistema-mundo global, renunciando a la complejidad interna y convirtiéndose en mero soporte infraestructural de los flujos globales. Frente a la incertidumbre que amenaza al propio sistema global, una estrategia defensiva debería centrarse en conservar los recursos locales que puedan dotar de cierta flexibilidad y autonomía a los territorios. Palabras clave: ordenación del territorio, globalización, flujos materiales, recursos locales, sostenibilidad. ABSTRACTMassive mobilization of energy and material resources has enabled economic integration among remote areas which were previously autonomous and relatively selfsufficient. Traditional models used for studying the territory on the basis of local resources are no longer effective to describe the new reality. Today the territories have come to serve a global world-system, forgoing their internal complexity and becoming mere infrastructural support of global flows. Faced with the uncertainty that threaten the global system itself, a defensive strategy should focus on preserving those local resources that can provide some flexibility and autonomy to territories.
Asumiendo que la financiación es una cuestión clave para impulsar las actuaciones de rehabilitación y regeneración urbana en el actual contexto económico, se analizan una serie de casos, nacionales e internacionales, para evaluar qué nuevos enfoques pueden servir para construir fórmulas innovadoras, de gestión y financiación, que impulsen este tipo de intervenciones en el contexto español. Del análisis de los casos, se define un conjunto de recomendaciones resumidas en torno a tres ejes: marco estable y flexible de financiación pública, complementariedad de la financiación pública y privada, y énfasis en la comunicación, intermediación y facilitación de los procesos.
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