Alloying effects on sulphur embrittlement of the γ-γ′ interface of nickel-based single-crystal superalloys

Fully first-principles calculations have been performed to investigate the alloying effect on the sulphur embrittlement of the n - n ' interface of nickel-based single-crystal superalloys. The shear and cohesive strengths of the inter-face are calculated in terms of Mayer bond orders (BOs), and the ratio R BO of shear strength over cohesive strength is analysed as a function of alloying element substitution. The interface characteristics are also studied using the electron charge-density distribution. It is found that the interplay between shear and cohesive strengths has a significant influence on the interfacial embrittlement. Using the phenomenological theory of fracture as well as the calculated ratio R BO, we propose a new mechanism responsible for relieving sulphur embrittlement of the n - n ' interface through alloying substitution.     

Combined therapy with borderline and narcissistic inpatients at the cassel hospital

An account is given here of a rather unorthodox approach to psychodynamic therapy with Borderline patients in part of the therapeutic community at the Cassel Hospital. ‘Combined therapy’ here refers to the setting in which one therapist sees patients in groups and individual sessions concurrently. The paper demonstrates the manner in which this approach brings to the fore the massive destructiveness and rage which so often lies at the core of these patients' difficulties. This is done by describing the development of the group over its first nine months. The therapist comes to be split in the patient's perception, the group sessions representing separation in all its most hated aspects rather than as a prerequisite for differentiation and growth. The resultant rage and destructiveness threaten to render the group unworkable and dangerous. The individual sessions, by contrast, represent a fantasy of being regressed and at one with the ideal mother. It is my belief that these difficulties can be contained only within a therapeutic community. The strength of this approach lies in the vivid reconstruction of a central conflict for these patients and corresponding potential for working through difficulties in the area of separation and individuation. It is also particularly effective in bringing the therapeutic community alive within the therapy. The discussion attempts to address some of the complex theoretical issues raised by the transformation of the transference in both settings which occurs when they are used together and with the same therapist.     

Semantic size does not matter: "bigger" words are not recognized faster

Sereno, O'Donnell, and Sereno (2009) reported that words are recognized faster in a lexical decision task when their referents are physically large than when they are small, suggesting that "semantic size" might be an important variable that should be considered in visual word recognition research and modelling. We sought to replicate their size effect, but failed to find a significant latency advantage in lexical decision for "big" words (cf. "small" words), even though we used the same word stimuli as Sereno et al. and had almost three times as many subjects. We also examined existing data from visual word recognition megastudies (e.g., English Lexicon Project) and found that semantic size is not a significant predictor of lexical decision performance after controlling for the standard lexical variables. In summary, the null results from our lab experiment--despite a much larger subject sample size than Sereno et al.--converged with our analysis of megastudy lexical decision performance, leading us to conclude that semantic size does not matter for word recognition. Discussion focuses on why semantic size (unlike some other semantic variables) is unlikely to play a role in lexical decision.     

Attention and the subjective expansion of time

During brief, dangerous events, such as car accidents and robberies, many people report that events seem to pass in slow motion, as if time had slowed down. We have measured a similar, although less dramatic, effect in response to unexpected, nonthreatening events. We attribute the subjective expansion of time to the engagement of attention and its influence on the amount of perceptual information processed. We term the effect time's subjective expansion (TSE) and examine here the objective temporal dynamics of these distortions. When a series of stimuli are shown in succession, the low-probability oddball stimulus in the series tends to last subjectively longer than the high-probability stimulus even when they last the same objective duration. In particular, (1) there is a latency of at least 120 msec between stimulus onset and the onset of TSE, which may be preceded by subjective temporal contraction; (2) there is a peak in TSE at which subjective time is particularly distorted at a latency of 225 msec after stimulus onset; and (3) the temporal dynamics of TSE are approximately the same in the visual and the auditory domains. Two control experiments (in which the methods of magnitude estimation and stimulus reproduction were used) replicated the temporal dynamics of TSE revealed by the method of constant stimuli, although the initial peak was not apparent with these methods. In addition, a third, control experiment (in which the method of single stimuli was used) showed that TSE in the visual domain can occur because of semantic novelty, rather than image novelty per se. Overall, the results support the view that attentional orienting underlies distortions in perceived duration.     

Chinese and Americans see opposite apparent motions in a Chinese character

The perceived direction of apparent motion can be influenced by both "top-down" factors, such as expectation, and by "bottom-up" or stimulus-driven factors, such as grouping (Tse, P., Cavanagh, P. & Nakayama, K. (1998). The role of parsing in high-level motion processing. In T. Watanabe, High-level motion processing - computational, neurobiological and psychophysical perspectives. Cambridge, MA: MIT Press). Here we report the results of a single experiment that pitted top-down cues against bottom-up cues in an apparent motion sequence over the successive strokes of a Chinese character. Although each stroke was in fact presented all at once, subjects raised in China tended to see apparent motion over a single stroke in the direction it would have taken when drawn by hand, even though bottom-up cues drive a percept of apparent motion in the opposite direction for observers unfamiliar with the Chinese language. There is therefore a learned component to motion perception arising from top-down expectations capable of overriding bottom-up cues to motion.     

Assessing the impact of group treatment for aggressive inpatients

The purpose of this research was to determine if psychodynamic group psychotherapy decreases the occurrence of physical assault by male group members. The design of the study was a randomized clinical trial. Patients assigned to the control group received the customary clinical care. Patients assigned to the Group Therapy attended a psychodynamic psychotherapy group to help them cope with their aggressive impulses. Both quantitative and qualitative measures were used. Group members showed decreased expression of anger at followup, increased effort to control anger at followup, and decline in aggressive behavior. Control subjects demonstrated no change in level of angry feelings, increased expression of anger at follow-up, decrease in effort to control anger at follow-up, and no change in aggressive behavior. A model for conducting a psychodynamic psychotherapy group for assaultive men was developed which describes process and content aspects as well as leader interventions by group phase.     

Age differences in facial trustworthiness judgement based on multiple facial cues

Multiple facial cues such as facial expression and face gender simultaneously influence facial trustworthiness judgement in adults. The current work was to examine the effect of multiple facial cues on trustworthiness judgement across age groups. Eight-, 10-year-olds, and adults detect trustworthiness from happy and neutral adult faces (female and male faces) in Experiment 1. Experiment 2 included both adult and child faces wearing happy, angry, and neutral expressions. Nine-, 11-, 13-year-olds, and adults had to rate facial trustworthiness with a 7-point Likert scale. The results of Experiments 1 and 2 revealed that facial expression and face gender independently affected facial trustworthiness judgement in children aged 10 and below but simultaneously affected judgement in children aged 11 and above, adolescents, and adults. There was no own-age bias in children and adults. The results showed that children younger than 10 could not process multiple facial cues in the same manner as in older children and adults when judging trustworthiness. The current findings provide evidence for the stable-feature account, but not for the own-age bias account or the expertise account.     

Social functioning and adjustment in Canadian-born children with Chinese and European backgrounds

The purpose of the study was to examine social functioning and adjustment in peer context in Chinese Canadian and European Canadian children. A sample of elementary school children participated in the study. Data on social functioning, peer acceptance and rejection, and victimization were collected from peer assessments and sociometric nominations. The results indicated that Chinese Canadian children were viewed by peers as less aggressive-disruptive than European Canadian children. Chinese Canadian girls, but not boys, were more shy-sensitive than their European Canadian counterparts. Sociability was associated with peer acceptance, whereas aggression was associated with peer rejection and victimization. Shyness was associated with peer relationship difficulties more evidently in European Canadian children than in Chinese Canadian children. These results indicate the relevance of ethnic background to children's peer social experiences.     

Contrasting effects of a hot and a cool system in anger regulation on cooperative behaviours

Angry mood and aggression are strongly associated. However, it is not socially acceptable to express strong aggression. Non-cooperative behaviours might be another aspect of aggressive behaviour. The present study examines the expression of non-cooperative behaviours after angry mood induction. Eighty-five university students were randomly assigned to hot or cool focus recall of a past angry event. At baseline, trait aggression and rejection sensitivity were evaluated. Just before the recall task, participants' state of angry mood was measured by the Anger Mood Scale. Then they engaged in either hot or cool focus recall of a past rejection event. Immediately after the mood induction, angry mood was measured again. They were then instructed to play the Mixed Motive game with an unknown person. Participants in both groups became angrier after the mood induction. One-way analysis of covariance, controlling for trait anger and rejection sensitivity, showed that the hot-focus participants gave significantly fewer points to the other person than the cool-focus participants. Participants high on trait aggression sent more verbally aggressive messages. The findings suggest that non-cooperative behaviour is another form of anger related aggression and might be more socially important than overt aggression.     

Pop-out for illusory rather than veridical trajectories with double-drift stimuli

Attention, Perception, & Psychophysics - If a patch of texture drifts in one direction while its internal texture drifts in the orthogonal direction, the perceived direction of this...