Electron microscopy of grain boundaries: An application to RE-Fe-B (RE = Pr or Nd) magnetic materials

Abstract

To study the grain boundaries of the technologically important RE_13.75Fe_80.25B₆ (RE = Pr or Nd) permanent magnets, we developed a new method using small-angle dark-field imaging based on inner-potential differences at the grain boundaries, combined with high-resolution electron microscopy and nanoscale chemical analysis. In both the Pr- and Nd-based melt-quenched die-upset magnets we consistently observed a very thin Fe-rich amorphized intergranular phase at the boundaries, and this finding may have an impact on our understanding of the coercivity mechanism of these materials. Although the value of the method was demonstrated for transition metal-rare earth intermetallics, it may also be applied to grain-boundary studies in other materials.     

Locus of evaluation control,task directions,and type of problem effects on creativity

Abstract:

Ninety‐one eleventh‐graders from one suburban, middle‐class high school completed one realistic and one unrealistic divergent thinking problem. Students were randomly assigned to groups directed to think of unique or common ideas, and their locus of evaluation control was assessed. Internal males and external females were most fluent on the unrealistic task, but males asked to give common ideas and females asked to give unique instructions were the most original. Results were discussed in terms of gender role stereotypes and their differential effects on males’ and females’ creative problem solving.     

Analysis of Effect for Single-Case Design Research

Single-case design (SCD) research is an experimental approach for analysis of an effect between an independent variable and dependent variable. Traditionally, analysis of effect for SCD has relied on visual analysis, an approach whereby a trained observer analyzes a visual display of the data. Recent advances in statistical approaches have been forwarded for SCD research in the literature to assist in the interpretation of intervention effects. This review outlines the logic of SCD and describes the varied approaches for the analysis of effect in SCD research.     

Academic Course Combining Psychological Skills Training and Life Skills Education for University Students and Student-Athletes

In Part II, we present two case studies of erotic transference and countertransference in sport psychology service delivery. We interviewed two seasoned practitioners, both with long histories of working with athletes. These sport psychologists represent two extremes of the spectrum when encountering the erotic in service delivery. One participant's story is about denial, suppression, and repression of anything that hints of the erotic in practitioner-client relationships. The other sport psychologist's story is about a nearly unbridled reveling in the erotic with a client. The practitioners are easy to condemn, one for ignorance and lack of awareness of self and others, the other for adolescent fantasies and objectification of his client. But those responses are facile and uncharitable. We present these two cases as examples, albeit extreme ones, of how truly complex the erotic is in service delivery. Their stories illustrate, in sometimes painful and graphic ways, what it is to be human, all-too-human, in our encounters with the people we serve.     

“Was It Good for You?”: Reply to Commentaries

In many ways, psychoanalysis revolutionized attitudes about sexuality. Yet by undertheorizing female erotic passion and downplaying the role of the clitoris, psychoanalysis perpetuated a long historical tradition of denying essential aspects of women's sexual experience. Psychoanalysis has at times contributed to women perceiving their own bodily erotic excitement as frightening, dangerous, and out of control. In this reply to the commentaries, the authors continue to explore the ways in which women and women's experience, especially their embodied sexual experience, are so often rendered invisible.     

Review Essay: Psychoanalysis,Post-Modernism and the Lesbian Rule

Lesbian Lives and Sexual Subjects reflect important contemporary trends in feminism, postmodern literary studies, and relational psychoanalysis. Both books are critical of such traditional psychoanalytic ideas as drives and developmental stages. Although such an orientation leads to important insights and reconceptualizations, it may also relinquish other important values, such as stable sexual identity, the capacity to mourn for lost possibilities, and the ability to commit to real, limited projects. In addition, the denial of sex and aggression as motivating forces and the alternative emphasis on attachment lead paradoxically to an impoverished sense of independence and active agency. One of Magee's cases is discussed.     

QUANTITATIVE MEASURES OF CONSTRUING IN CHILD ABUSE SURVIVORS

Quantitative aspects of construing associated with long-term effects of abusive childhood experiences are examined within a personal construct theory framework. Indices of negative self-construing, reduced identification with others, and extreme construing are compared from the elicited Repertory Grids (RepGrids) of survivors of sexual, physical, and emotional abuse and nonabused controls (N = 336). Responses to the Automatic Thoughts Questionnaire (ATQ) are also compared, as a further measure of negative self-constructions. Abuse histories are particularly associated with RepGrid and ATQ measures of negative self-constructions and with RepGrid measures of perceived differences between self and parents. Among cognitive and construct measures, the ATQ is most strongly related to standardized measures of symptom distress and social maladjustment, but RepGrid measures also make a unique contribution. From the RepGrid, extreme perceptions of self are related to symptom distress and social maladjustment, and self-ideal discrepancy is related to social maladjustment. Shared method variance and standardized statements specifically relevant to self-evaluation and pathology may contribute to the predictiveness of the ATQ. In contrast, the RepGrid samples a more general range of idiographic constructs used in comparing people.     

Working memory, fluid intelligence, and impulsiveness in heavy media multitaskers

Ophir, Nass, and Wagner (Proceedings of the National Association of Sciences 106:15583–15587, 2009) reported that individuals who routinely engage in multiple forms of media use are actually worse at multitasking, possibly due to difficulties in ignoring irrelevant stimuli, from both external sources and internal representations in memory. Using the media multitasking index (MMI) developed by Ophir et al., we identified heavy media multitaskers (HMMs) and light media multitaskers (LMMs) and tested them on measures of attention, working memory, task switching, and fluid intelligence, as well as self-reported impulsivity and self-control. We found that people who reported engaging in heavy amounts of media multitasking reported being more impulsive and performed more poorly on measures of fluid intelligence than did those who did not frequently engage in media multitasking. However, we could find no evidence to support the contention that HMMs are worse in a multitasking situation such as task switching or that they show any deficits in dealing with irrelevant or distracting information, as compared with LMMs.     

Face detection differs from categorization: Evidence from visual search in natural scenes

In this study, we examined whether the detection of frontal, ¾, and profile face views differs from their categorization as faces. In Experiment 1, we compared three tasks that required observers to determine the presence or absence of a face, but varied in the extents to which participants had to search for the faces in simple displays and in small or large scenes to make this decision. Performance was equivalent for all of the face views in simple displays and small scenes, but it was notably slower for profile views when this required the search for faces in extended scene displays. This search effect was confirmed in Experiment 2, in which we compared observers’ eye movements with their response times to faces in visual scenes. These results demonstrate that the categorization of faces at fixation is dissociable from the detection of faces in space. Consequently, we suggest that face detection should be studied with extended visual displays, such as natural scenes.     

Brief Report: Non-suicidal Self-injury in the Context of Self and Identity Development

This brief report describes an exploratory qualitative study that examined online narratives of non-suicidal self-injury (NSSI) in the context of critical developmental tasks of early adulthood: the development of self and identity. Thematic analyses of online autobiographical accounts of NSSI suggest that self and identity processes that are particularly relevant in early adulthood may contribute to vulnerability to NSSI. Specifically, NSSI may provide a source of self-identification in the service of developing self-identity and a community of others with whom to identify, a means for managing negative emotions specifically related to negative self-concept, and it may provide a basic sense of a coherent self who persists across time. Implications are discussed with respect to research, clinical practice, and prevention, with a particular emphasis on the Internet as a context for early adult development.