Critical length scales for the deformation of amorphous metals containing nanocrystals

Shear localization is studied in simulated amorphous systems containing individual nanocrystalline inclusions. Systematic variation of the inclusion diameter and the shear band thickness reveals a crossover in length scales that separates distinct plastic flow mechanisms in and around the nanocrystalline inclusion. When considered relative to the shear band thickness, small inclusions deform via heterogeneous, interface-dominated mechanisms, while large inclusions yield via the homogeneous nucleation of dislocations in the nanocrystal interior; nanocrystals roughly twice as large as the shear band width are required for the strongest interaction.     

Human and peoples' rights: social representations among Cameroonian students

Social representations of human and peoples' rights were studied among Cameroonian university students (N = 666) with a questionnaire based on the UN Declaration of Human Rights and the African Charter on Human and Peoples' Rights and Duties. The respondents were asked how important and how well realized they regarded the 39 human and peoples' rights to be. A 13-factor model provided the best fit with Cameroonian students' perceptions of human and peoples' rights. Taken as a whole, our results are in line with previous quantitative studies on human rights, confirming structural similarity but also country-specific variation in the aggregation of specific rights. Moreover, our data showed that Cameroonian students value human and peoples' rights highly (M = 6.18), whereas their fulfillment is not regarded as highly (M = 5.09). Same law for all, equality and freedom, and right to work and living were highly appreciated but lowly realized rights. Higher than average in importance and realization were right to education and self-fulfillment, right to marriage and property, peoples' social and political basic rights and right to life and safety. Low in importance and realization were peoples' right to their country's natural resources and independence, right to meetings, and right to express opinion. Women appreciated the rights more than men and thought of their rights as better realized compared to men. We suggest that when women say that their rights are better fulfilled than men do, it is in comparison with the older generation, who are still very dependent on men. Nowadays, thanks to education and urbanization, young women have wider choices or opportunities for marriage and jobs. Men may feel frustrated in the context of political liberalization because the freedoms are more theoretical than fulfilled; the economic crises and cultural changes have hindered their economic domination and their prerogatives.     

Changing the Sexist Language: The Theory Behind the Practice

The existence of sexism in the structure and usage of the English language has recently been extensively documented by linguists, psychologists, feminists, publishers, and others. This awareness of sexism in language has led to numerous suggestions for change, but their implementation has been difficult for the following reasons: (1) alternative proposals were frequently made (e.g., at least 10 alternatives to the use of the masculine pronouns as generics have been proposed); (2) some suggestions contradict each other (e.g., chairman may be retained and contrasted with chairwoman , or chairman may be eliminated from usage and chairperson used for both sexes); (3) misunderstanding of some of the suggestions has occurred (e.g., chairperson has been used in reference to only females, while chairman has been retained for males); (4) a frequent response to some of the suggestions for change has been ridicule, often in the form of overextensions of the original suggestions (e.g., woperson ). In this paper, as a first step toward clarifying the inconsistencies, identifying the problems in implementation, and undermining the basis for continued misunderstanding and ridicule, I have categorized the various suggestions regarding changing sexist language according to their underlying rationale. I have identified the following alternative approaches: (1) indirect change, (2) change via circumvention, and (3) change via emphasis on feminine terms. Within these approaches, various alternative strategies for implementation are discussed, and the arguments and research supportive of and critical of the underlying rationales are identified and evaluated. The paper concludes with a recommendation of changes in usage that are suggested by the latter two approaches. The need for further research on the differing psychological effects of those alternatives is noted.     

Validation of distinct amnesic and executive type memory deficit in a psychiatric sample based on retrieval performance

Studies of localized brain dysfunctions have revealed connections between patterns of cognitive dysfunction and specific profiles of memory impairment. The amnesic type of memory impairment is defined by deficits in both free recall and recognition memory, whereas the dysexecutive memory impairment is characterized by retrieval deficits, i.e. a disproportional impairment in free recall relative to recognition memory. The present study tests whether classifications of psychiatric patients into recall impaired only (= RO group) and Recall and Recognition impaired (= RR group) correspond to the executive type and amnesic type of memory impairment. The alternative hypothesis is that the two groups merely differ in degree of neuropsychological and psychiatric disturbance. Forty-four subjects impaired on California Verbal Learning Test (CVLT) were selected from a larger database of 103 impaired and non-impaired subjects with schizophrenia or recurrent major depression. Subjects were classified into RO and RR groups and compared on measures of memory strategy (recency effect and interference on CVLT), overall neuropsychological function (Stroop Test and WAIS-R similarity) and psychiatric symptom load (positive and negative symptoms). Repeated measures ANOVA showed no effects of group, i.e. the RR group did not perform consistently below the RO group with regard to memory strategy, neuropsychological function or psychiatric symptom load. Two out of three analyses showed group x test interaction, supporting the dissociation of distinct executive and amnesic profiles among psychiatric patients. The RO group was more susceptible to interference but had better recency score than the RR group. The RO had higher negative symptoms while the RR group had higher positive symptoms.     

Effects of teacher attention on study behavior

The effects of contingent teacher attention on study behavior were investigated. Individual rates of study were recorded for one first-grade and five third-grade pupils who had high rates of disruptive or dawdling behavior. A reinforcement period (in which teacher attention followed study behavior and non-study behaviors were ignored) resulted in sharply increased study rates. A brief reversal of the contingency (attention occurred only after periods of non-study behavior) again produced low rates of study. Reinstatement of teacher attention as reinforcement for study once again markedly increased study behavior. Follow-up observations indicated that the higher study rates were maintained after the formal program terminated.     

Early life adversity potentiates the effects of later life stress on cumulative physiological dysregulation

Background and Objectives: Previous research indicates that early life adversity may heighten stress reactivity and impair mechanisms for adaptive coping, suggesting that experience of stress in early life may also potentiate adults' physiological vulnerability to stress in later life. The study tested this hypothesis by investigating whether the experience of stressful events and circumstances (SEC) in childhood or adolescence amplified the effect of adulthood SEC on physiological dysregulation (allostatic load, AL) in later midlife. Design: Observational data were used in the present study. Physiological functioning was measured in later midlife (participants' age ranged from 49 to 63 years). Both childhood/adolescence and adulthood SEC were reported retrospectively on the same occasion. Methods: Participants were 5309 Danish men and women from Copenhagen Aging and Midlife Biobank (CAMB). SEC included socioeconomic and family factors. The AL index was based on nine cardiovascular, metabolic, and immune biomarkers. Results: Experience of SEC in both early life and adulthood independently predicted higher AL. In men, experience of SEC in early life also potentiated the effect of SEC in adulthood on AL. Conclusions: The results provide further insight into the mechanisms behind the “biological embedding” of childhood stress.     

Life Satisfaction in Persons with Late Effects of Polio

To assess satisfaction with life as a whole and with ten domains of life satisfaction in Swedish persons with late effects of polio, to describe the relationship with sex, age, marital status, use of mobility aids and self-perceived needs of instrumental support, and to compare the level of life satisfaction with a Swedish reference sample. A cross-sectional study of 160 persons with verified late effects of polio answered a postal questionnaire including the Life Satisfaction Questionnaire (LiSat-11). A majority were to some degree satisfied with life as a whole and with all the ten domains of life satisfaction. Satisfaction with life as whole was not related to any of the sociodemographic or disability related factors and these factors had few relations to the ten domains of life satisfaction. The respondents were significantly less satisfied with life as a whole and with vocation, leisure, sexual life, activities of daily living, and somatic and psychological health compared to the Swedish reference sample, but were significantly more satisfied with economy and contacts with friends. Men and women with late effects of polio, regardless of age, marital status or disability, can experience a reduced life satisfaction. This emphasises the need to identify potential gaps between these persons’ aspirations and achievements in life and carry out appropriate rehabilitation interventions to enhance their life satisfaction.     

Successful teaching techniques in a race relations class

The authors present suggestions for enhancing a university course in race relations. These approaches were used in a series of classes offered at a state university in the southeastern United States during a historical period of notable racial tension. This course provided a supportive arena for personal questioning, student interaction, and positive change. Even 20 years later, former students reported that experiential components, such as living with a family of another race, were powerful instruments in self-growth, development, and racial understanding. Many reported this class as the basis of profound, life-long positive changes in racial attitudes.