Automatización de una red de sensores inalámbricos Zigbee y desarrollo de aplicaciones sobre entornos GNU/Linux

Una red de sensores inalámbricos (WSN) está formada por dispositivos autónomos  (comúnmente llamados nodos o smart sensors). Estos dispositivos están formados por diversos sensores, un microcontrolador (el cuál adapta la señal de los sensores e implementa el protocolo de comunicación), memorias y un transceptor RF (que permite transmitir los datos de forma inalámbrica). Por lo cuál, estos nodos  cuentan con capacidades reducidas de cómputo, sensado y comunicación inalámbrica. Pueden ser utilizados por un gran número de aplicaciones, como ser: monitoreo y control de variables ambientales, industriales, domótica, etc.

Generation and retrieval of general, specific and autobiographic images representing concrete nouns

Four experiments with 101 university and high school students (aged 17–30 yrs) confirmed introspective evidence for the distinction between general (GE), specific (SP), and autobiographical (AG) images concerning the specificity of image contents. Ss were able to classify each type of evoked image and to evoke these kinds of images on request. When given generic instructions to form images, GE images were the most common result. Differences existed between the kind of images and the times necessary to evoke, study, and reactivate them. SP images were rated as the most vivid, while AG images were the best recalled. Data suggest great variability in imaginal processes activated from the same concept in different situation

Selective interference of a picture memory task on the recognition of high imagery words

Selective interference of a picture memory task on the recognition of high imagery word

Some conditions for the occurrence of the bizarreness effect in free recall

Existing literature on bizarreness effects in verbal learning mainly focuses on the common assumption that bizarre images are easier to recall than common ones. In so doing, however, researchers have obtained more negative than positive results. Further, among the few investigations that found this effect three used the same procedure and the same material in which a bizarre relationship between subject and object was achieved by substituting human beings for animals and vice versa. It was observed that a clear bizarreness effect may still be observed if inanimate sentences are constructed in accordance with the same principle of distorting typical relations (Expt 1). This effect remains, albeit in a milder form, when aspects of the original procedure are manipulated, such as eliminating complementary sentences (Expt 2) or abstract sentences (Expt 3) from the lists. This seems to demonstrate that the traditional opinion that bizarre images make the mnemonic task easier is, at least in part, true. Nevertheless, if one uses the procedure used by Merry & Graham (1978) and others with semantically unpredictable sentences, the bizarreness effect was attenuated and even normal sentences sometimes achieved higher scores (Expt 4). In general, these results reveal that bizarre sentences are more likely to result in better recall as regards number of nouns remembered, whereas the opposite is true as regards number of complete sentences remembered. This is consistent with the view that recall of normal sentences is facilitated by the unitization. These four experiments carried out with adult subjects demonstrate the generality of the bizarreness effect and some of the factors which contribute to it

MT – Avanzate 2. Prove MT Avanzate di Lettura e Matematica 2 per il biennio della Scuola Secondaria di II Grado

none6Queste prove son il primo e unico strumento sviluppato in Italia per valutare i livelli di apprendimento della lettura e della matematica del biennio della scuola secondaria di II grado. In questi ordini scolastici i disturbi dell’apprendimento rappresentano un problema di ampie dimensioni e con ripercussioni particolarmente gravi: identificare gli studenti con difficoltà di lettura o carenze nelle abilità matematiche, dunque, è fondamentale per avviare un efficace lavoro di recuperononeCornoldi C.; Pra Baldi A.; Friso G.; Giacomin A.; Giofrè D.; Zaccaria S.Cornoldi, C.; Pra Baldi, A.; Friso, G.; Giacomin, A.; Giofrè, D.; Zaccaria, S