Characterization of PLZT ceramics modified by isovalent (Ba,Sr), donor (Nb) and acceptor (Zn) dopants for piezoelectric applications

This article describes the influence of microstructure on the dielectric and piezoelectric properties of isovalent- donor- and acceptor-modified lead lanthanum zirconium titanate (PLZT) ceramics. The ceramic compositions, with formula: [Pb_0.954La_0.016Ba_0.01Sr_0.02][Zr_0.525Ti_0.475]_{0.981?( m /2)}Nb_0.012Zn _m O₃ where m =?0, 0.2, 0.4, 0.6, 0.8 and 1.0 mol% Zn, were synthesized via a solid-state reaction method. X-ray diffraction studies are supported by tolerance factor and electronegativity difference measurements. Scanning electron microscopy studies reveal grain growth enhancement with increase of Zn concentration. As the Zn concentration increased from 0 to 0.8 mol%, the room-temperature dielectric constant increased while the Curie temperature decreased continuously. An increase in the Zn content had the most significant effect on the piezoelectric properties. The optimum piezoelectric properties were observed for 1 mol% Zn composition.     

Individual differences in spatial configuration learning predict the occurrence of intrusive memories

The dual-representation model of posttraumatic stress disorder (PTSD; Brewin, Gregory, Lipton, & Burgess, Psychological Review, 117, 210-232 2010) argues that intrusions occur when people fail to construct context-based representations during adverse experiences. The present study tested a specific prediction flowing from this model. In particular, we investigated whether the efficiency of temporal-lobe-based spatial configuration learning would account for individual differences in intrusive experiences and physiological reactivity in the laboratory. Participants (N = 82) completed the contextual cuing paradigm, which assesses spatial configuration learning that is believed to depend on associative encoding in the parahippocampus. They were then shown a trauma film. Afterward, startle responses were quantified during presentation of trauma reminder pictures versus unrelated neutral and emotional pictures. PTSD symptoms were recorded in the week following participation. Better configuration learning performance was associated with fewer perceptual intrusions, r = ?.33, p < .01, but was unrelated to physiological responses to trauma reminder images (ps > .46) and had no direct effect on intrusion-related distress and overall PTSD symptoms, rs > ?.12, ps > .29. However, configuration learning performance tended to be associated with reduced physiological responses to unrelated negative images, r = ?.20, p = .07. Thus, while spatial configuration learning appears to be unrelated to affective responding to trauma reminders, our overall findings support the idea that the context-based memory system helps to reduce intrusions.     

International Genetic Counseling Students’ Perspective on Their Training Experience in the United States

International students face social, psychological and academic challenges upon moving to a foreign country to pursue higher education. Clinical disciplines such as genetic counseling present additional challenges adapting to an unfamiliar health care system and different interactions and expectations with patients and colleagues. This study used semi-structured interviews to identify challenges that international genetic counseling students face during training in the United States. Eight international genetic counseling alumni who graduated from U.S.-accredited programs were interviewed. Participants stated that the U.S. academic system was unfamiliar—class participation and paper-writing required the greatest adjustment. There was a need for help in understanding social norms in academic settings. Clinically, they were unfamiliar with the dynamics and communication style of U.S. families. Non-native English speakers experienced greater difficulty in all areas. Most participants reported that they were uncomfortable asking for help in transitioning to life, study and work. Participants identified mentorship programs for international students as potentially useful in clarifying expectations in academic and clinical settings. These results may assist international students preparing to study genetic counseling in the U.S. and may help genetic counseling training programs identify the academic and clinical challenges faced by international students.     

Elevation easier than plan for sighted and early-blind adults in a perspective-taking task

Plans show shapes of objects from above, and represent both their left–right order and their order in the z-dimension (the distance of the objects). Elevations show only the vertical shapes of objects arranged from left to right. Plans, having more spatial information, may be more difficult for participants to construct. Results from a study with sighted, sighted-blindfolded, and early-blind participants on Piaget's perspective-taking three-mountain task support this hypothesis. The plan task was judged more difficult than the elevation task even when participants performed with the same level of accuracy on both tasks. In visual and tactile tasks, amount of spatial-order information may determine difficulty, rather than plan versus elevation per se.     

Does Absence Make the Heart Grow Fonder? Work-Related Travel and Marital Satisfaction

Using a sample of 961 dual-earner couples, the authors examined the relationship between work-related travel and marital satisfaction, using gender role attitudes and parental status as moderators. For women and men with children, the impact of travel is generally consistent with gender role congruence theory, which posits that marital satisfaction will be highest when gender role attitudes and gender role behaviors are congruent. Generally, when one holds traditional gender role attitudes, marital satisfaction is stable or enhanced when the husband travels, and is lower when the wife travels. Nontraditional parents are generally less happy if either member travels. The results were less predictable among couples without children in the home.     

Exploring changes during life and career design dialogues

This article describes the processes of change that occur during career counseling based on the ‘making oneself self’ model (Guichard, 2008; Guichard, 2009). This counseling intervention process forms part of the more general paradigm of life designing (Savickas et al., 2009). The main goal for this counseling is fostering “reflexivity” of individuals with regard to their investment in their various spheres of life. Three career counseling interviews were conducted using both methods of dialogues for life and career design dialogues (LCDD) and self-confrontation (Larsen, Flesaker, & Foundation, 2008; Valach, Michel, Dey, & Young, 2002). Each interview is described with a focus on the changes perceived by the interviewees in relation to their initial reason for consulting as well as on their dialogues with the counselor, who facilitated these changes and provided support for them. The analysis of the dialogues suggests the existence of a three-step evolution supporting the changes. On the basis of these data, the discussion examines the reflexive approach in its theoretical, methodological and practical dimensions.     

On the Grammar of Politics—or Why Conservatives Prefer Nouns

Previous research indicates that political conservatism is associated with epistemic needs for structure and certainty (Jost et al., 2003) and that nouns elicit clearer and more definite perceptions of reality than other parts of speech (Carnaghi et al., 2008). We therefore hypothesized that conservatives would exhibit preferences for nouns (vs. verbs and adjectives), insofar as nouns are better suited to satisfy epistemic needs. In Study 1, we observed that social conservatism was associated with noun preferences in Polish and that personal need for structure accounted for the association between ideology and grammatical preferences. In Study 2, conducted in Arabic, social conservatism was associated with a preference for the use of nominal sentences (composed of nouns only) over verbal sentences (which included verbs and adjectives). In Study 3, we found that more conservative U.S. presidents used greater proportions of nouns in major speeches, and this effect was related to integrative complexity. We discuss the possibility that conservative ideology is linked to grammatical preferences that foster feelings of stability and predictability.     

When Living and Working Well Together in Organizations Changes Into Good Social Coexistence: The Talent Club Case

In our contemporary age, where a combination of individualism and mutual distrust is unhappily common among people and society is “liquid” and disoriented, so-called intermediate units (groups, associations) are a precious resource that promotes positive coexistence within organizations and in local communities, too. The present contribution describes an example of such an intermediate unit, the Talent Club, located in a peripheral neighborhood of a metropolitan area in northern Italy. This case study shows the development of positive living and working together in organizations and their transformation in the tool for community development and good coexistence. Qualitative and quantitative data show that the relational aspect is crucial because it promotes authentic exchange among people, supporting participation and social cohesion against self-referential habits and isolation. Although at present the Talent Club is mostly functioning in a affiliating coexistence among members, seeds of a more generative coexistence are clearly detectable.     

Self-reported competences and problems in Spanish adolescents: a normative study of the YSR

The aim of the study was to provide a standardization of self-reported competences and emotional/behavioural problems in Spanish adolescents, using the Achenbach's Youth Self-Report (YSR), and to compare our results to those from other countries. The YSR was completed by 2822 adolescents aged 11-18 years, recruited from secondary schools in two regions of Spain. There were significant differences in Total behaviour problems and in most problem scales in boys and girls, scoring boys higher on externalizing syndromes, whereas girls score higher on internalizing syndromes . Males' mean scores were higher than females' scores for social competence. Age effects also showed significant differences with respect to internalizing problems, thought problems, social problems and depression. Cut-off points based on the 90th and 98th percentile developed from this sample are presented for the competences and the problem scales. To test the overall range of variations across cultures, comparisons were made between broad band and narrow band measures of the YSR in Spanish adolescents and those from other countries. Gender differences in the YSR were similar to those found across different cultures; there is a consistent trend to increase behavioural problems with age; and social competence seem to be a relevant protective factor against behavioural problems.