User centered design involves the creation of design artifacts such as task and architecture models. It is increasingly accepted that such artifacts cannot effectively be created separately, but instead coevolve incrementally, so that information obtained from the development of one artifact contributes to the development of the others. In user interface development, different people with diffe...

At Uan Afuda, and other Early Holocene sites of the Acacus mountains, in the Libyan Sahara, dung layers and plant accumulation are a major, but repeatedly neglected, feature of hunter-gatherer communities. To understand the formation and meaning of such features, a multidimensional analysis has been undertaken, combining micromorphological, palynological, botanical, archaeozoological, and archa...

La presente investigación tuvo por objetivo analizar el perfil emocional del estudiantado de la Licenciatura Psicología Universidad Autónoma Nayarit (UAN) para establecimiento diferencias grado y sexo. Se utilizó un muestreo aleatorio, no probabilístico voluntario. mantuvo enfoque cuantitativo, corte transversal, descriptivo comparativo. aplicó Inventario Manejo Emocional a 239 estudiantes pert...

In this paper, we argue that existing languages for representing routine cognitive tasks (such as GOMS, UAN, and PDL) can fail either because they demand that task competence is described using serial position to determine temporal order (and they are therefore overly restrictive) or because they demand that partial orderings are specified with temporal dependencies and other logical relationsh...

We develop a specification test and a sequence of model selection procedures for nonnested, overlapping, and nested models based on the second Hansen-Jagannathan distance, which requires a good asset pricing model to not only have small pricing errors but also be arbitrage free. Our methods have reasonably good finite sample performances and are more powerful than existing ones in detecting mis...