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M.J.C.S. Reis R. Morais E. Peres C. Pereira O. Contente S. Soares A. Valente J. Baptista P.J.S.G. Ferreira J. Bulas Cruz 《Journal of Applied Logic》2012,10(4):285-290
Despite the benefits of precision agriculture and precision viticulture production systems, its rate of adoption in the Portuguese Douro Demarcated Region remains low. We believe that one way to raise it is to address challenging real-world problems whose solution offers a clear benefit to the viticulturist. For example, one of the most demanding tasks in wine making is harvesting. Even for humans, the environment makes grape detection difficult, especially when the grapes and leaves have a similar color, which is generally the case for white grapes. In this paper, we propose a system for the detection and location, in the natural environment, of bunches of grapes in color images. This system is able to distinguish between white and red grapes, and at the same time, it calculates the location of the bunch stem. The system achieved 97% and 91% correct classifications for red and white grapes, respectively. 相似文献
94.
Amy L. Johnson Steven J. Sherman Abraham M. Rutchick Mario B. Ferreira 《Journal of experimental social psychology》2006,42(6):707-719
The social motivation functions of intimacy, task, and social category groups were investigated. In two studies, participants were asked to consider the extent to which their group memberships fulfilled several needs. A factor analysis confirmed that the needs comprised three factors: affiliation, achievement, and identity. Intimacy groups were associated with affiliation needs, task groups were associated with achievement needs, and social category groups were associated with identity. A study using implicit measures reinforced those results, revealing the presence of the same implicit associations between group types and need fulfillments. A final study manipulated participants’ need state through a priming procedure. Priming a specific need (affiliation, achievement, and identity) led to an increased accessibility of the group type that was best suited to meet that need (intimacy, task, social category, respectively). Results help clarify the functional aspects of groups and have implications for the perception and organization of group-level information. 相似文献
95.
Mário B. Ferreira Leonel Garcia-Marques David Hamilton Tânia Ramos James S. Uleman Rita Jerónimo 《Journal of experimental social psychology》2012,48(1):1-12
More than twenty five years after the beginning of research on spontaneous trait inferences (Winter & Uleman, 1984) an intriguing paradox in the impression formation literature remains: if traits are spontaneously inferred, why aren't they used to organize behavioral information and thereby facilitate recall under memory instructions (Hamilton, Katz, & Leirer, 1980)? We hypothesized that organization by traits is more evident under impression formation goals because only in that case then are inferences sufficiently monitored to permit their use in organizing impressions. As a consequence, such monitored traits can then be used strategically as retrieval cues. Merging the main features of the Winter and Uleman and the Hamilton et al. experimental paradigms, Experiment 1 simultaneously replicated the main results of both studies. Using a new recognition paradigm, Experiments 2 and 3 further tested this inference monitoring hypothesis by showing that monitoring of trait inferences only occurs under particular processing goals, and is dependent on the availability of cognitive resources. 相似文献
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Ana Sofia Santos Leonel Garcia-Marques Diane M. Mackie Mário B. Ferreira B. Keith Payne Sérgio Moreira 《Journal of experimental social psychology》2012,48(6):1257-1266
Although stereotypes have traditionally been regarded as stable, research has documented their considerable malleability. One potential source of such malleability is intrusion into the stereotype of other concepts also activated when the stereotype is activated. In three experiments we assessed the extent to which stereotypes were influenced by stereotypic, stereotype-unrelated, or counter-stereotypic traits activated in a completely unrelated context immediately prior to stereotype measurement. Across experiments, priming of stereotype-unrelated traits increased their inclusion in the stereotype, whereas priming of counter-stereotypic traits had no effect in the subsequently assessed stereotype. In Experiment 3 we collected perceived dispersion measures and showed that although priming counter-stereotypic traits had no effect on overall characterization of the target group, it boosted perceptions of the group's variability. We accounted for these results by extending Higgins' (1989) Synapse Model of knowledge accessibility to the stereotype domain. 相似文献
98.
We examined the role of identification with violent TV heroes, enjoyment of TV violence, and perceived reality in TV violence as mediators of the relationship between viewing TV violence and subsequent physical and verbal aggression. A sample of 722 4th, 6th, and 8th grade students from schools in the central region of Portugal completed measures assessing enjoyment of TV violence, perceived reality, aggression, identification with violent TV heroes, and exposure to TV violence. The results showed that the relationship between TV violence and physical aggression is mediated by enjoyment of TV violence, perceived reality in TV violence, and identification with violent TV heroes. The TV violence to verbal aggression relationship was also mediated by enjoyment of TV violence. 相似文献
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Relative age effect in Olympic Taekwondo athletes 总被引:2,自引:0,他引:2
Albuquerque MR Lage GM da Costa VT Ferreira RM Penna EM Moraes LC Malloy-Diniz LF 《Perceptual and motor skills》2012,114(2):461-468
Relative age effects refer to the effects of age differences among individuals who have been grouped together for a performance activity. This study aimed to investigate the relative age effect on Olympic Taekwondo athletes, in several Olympic Games, and in both sexes. The study sample consisted of 291 athletes who had competed in Atlanta, Sydney, and Beijing Olympic Games. The relative age effect was examined for the general distribution of athletes by quartile, for each of the individuals, and for male and female athletes. There were no discernable effects of relative age on Olympic Taekwondo athletes. 相似文献
100.
Carneiro P Fernandez A Diez E Garcia-Marques L Ramos T Ferreira MB 《Memory & cognition》2012,40(2):252-265
Previous research using the Deese–Roediger–McDermott (DRM) paradigm has shown that lists of associates in which the critical
words were easily identified as the themes of the lists produce lower levels of false memories in adults. In an attempt to
analyze whether this effect is due to the application of a specific memory-editing process (the identify-to-reject strategy),
two experiments manipulated variables that are likely to disrupt this strategy either at encoding or at retrieval. In Experiment
1, lists were presented at a very fast presentation rate to reduce the possibility of identifying the missing critical word
as the theme of the list, and in Experiment 2, participants were pressed to give yes/no recognition answers within a very
short time. The results showed that both of these manipulations disrupted the identifiability effect, indicating that the
identify-to-reject strategy and theme identifiability play a major role in the rejection of false memories in the DRM paradigm. 相似文献