Artículo de publicación ISIIn current aspect-oriented systems, aspects usually carry, through their pointcuts, explicit references to the base code. Those references are fragile and hinder important software engineering properties such as modular reasoning and independent evolution of aspects and base code. In this work, we introduce a novel abstraction called Join Point Interface, which, by design, aids modular reasoning and independent evolution by decoupling aspects from base code and by providing a modular type-checking algorithm. Join point interfaces can be used both with implicit announcement through pointcuts, and with explicit announcement, using closure join points. Join point interfaces further offer polymorphic dispatch on join points, with an advice-dispatch semantics akin to multimethods. To support flexible join point matching, we incorporate into our language an earlier proposal for generic advice, and introduce a mechanism for controlled global quantification.We motivate each language feature in detail, showing that it is necessary to obtain a language design that is both type safe and flexible enough to support typical aspect-oriented programming idioms. We have implemented join point interfaces as an open-source extension to AspectJ. A case study on existing aspect-oriented programs supports our design, and in particular shows the necessity of both generic interfaces and some mechanism for global quantification

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Integration of the AFP delta-slope with conventional criteria may further improve patient selection and post-LT outcomes; prospective studies are needed to validate the present proposed model.

In standard AspectJ, aspects and base code are often insufficiently decoupled, as aspects hold pointcuts, which can contain explicit textual references to base code. This hinders aspect evolution and reuse, and may hinder reasoning about aspects on the base-code side.In this demo we present join point interfaces as an extension to the aspect-oriented programming language AspectJ. Opposed to AspectJ, with join point interfaces aspects and base code communicate only through a shared interface abstraction. Aspects themselves go without pointcuts and only reference the interface. Pointcuts are typically defined on the base-code side, or not at all, as join point interfaces also support pure explicit invocation as known from publish-subscribe systems. As a result, users obtain a language which decouples aspects from base code using a modular type-checking algorithm, and which they can use to adopt aspects gradually as they desire.One major undertaking in the design of join point interfaces was to make the language as flexible to use as standard AspectJ, while nevertheless providing interfaces supported by strong type checks that can completely avoid type errors at composition time. In this demo we will discuss this inherent trade-off, we will present JPIs as an extension to the AspectBench Compiler, and will show how the language eases the maintenance of existing AspectJ applications.

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Basado en nuestro trabajo previo sobre estrategias cognitivas para el cálculo mental, presentamos el diseño de un sistema computacional adaptable al contexto, denominado ECOCAM, que apunta a promover estrategias de cálculo mental en alumnos de educación básica. Realizamos un primer testeo de nuestra propuesta a través de la implementación concreta de ECOCAM para promover una estrategia de sumas, a saber la de “trasvasije”, mediante un experimento piloto y estudio de casos, con niñas y niños en varios niveles de educación básica. Discutimos los resultados y las implicaciones para un desarrollo futuro e implementación de ECOCAM.

Environmental problems are increasingly frequent. They are no longer interpreted as a problem resulting exclusively from production processes but rather a problem of individual behavior and perception. This study proposes a behavior model that measures individuals' willingness to pay (WTP) for improved air quality via a firewood certification program. We surveyed 776 people and found that individuals exhibit favorable behavior toward the environment based on the previous knowledge they have about environmental issues. We suggest that more information needs to be provided to the population so that they have a greater understanding about environmental problems, thus encouraging behaviors that are more favorable toward the environment. Such actions will allow for decontamination programs, like the one outlined in this study, to be more readily supported and implemented.