A first HREM observation of the ordered carbon sublattice in a transition-metal carbide (VC1-x)

Abstract

The microstructure of long-range-ordered vanadium carbides based on V₆C₅ has been analysed by means of high-resolution electron microscopy (HREM). Lattice images have been produced by including in the objective-aperture superlattice spots associated with the ordered distribution of vacancies in the interstitial carbon sublattice of these substoichiometric compounds: ‘perfectly’ ordered structures have been imaged, and a direct discussion of the experimental micrographs is made in terms of positions of the vacancy-containing columns. This HREM study will soon be extended to theinvestigation of various kinds of planar defects within differently annealed specimens.     

Ishmael as Abraham's Sacrifice: Ibn Taymiyya and Ibn Kathīr on the Intended Victim

This article examines how Ibn Taymiyya and Ibn Kathīr shift the Islamic exegetical tradition towards accepting Ishmael as Abraham's intended sacrifice. Earlier exegetes, such as al-?abarī, maintained that Isaac was the intended sacrifice through a philological analysis of the qur'anic text. Contrary to expectations, Ibn Taymiyya and Ibn Kathīr do not only use Prophetic reports (Hadith) to make their case but also employ biblical and philological arguments. The modern dominance of Ibn Taymiyya's qur'anic hermeneutic and the popularity of Ibn Kathīr's qur'anic exegesis have influenced Islamic orthodoxy to hold that Ishmael was the sacrificial son and to be more skeptical of biblical sources.     

Predicting eating problems among Malaysian Chinese: Differential roles of positive and negative perfectionism

Positive and negative perfectionism (measured by the Positive and Negative Perfectionism Scale; PANPS) are found to have differential roles in predicting eating problems. This study translated and back-translated the PANPS into Chinese and then examined whether its factor structure was comparable to the original PANPS. The relationships between positive and negative perfectionism (using Chinese PANPS) and eating problems were also evaluated. Malaysian Chinese (N = 205) adults completed the Chinese PANPS, Eating Disorder Inventory (EDI) and Marlowe-Crowne Social Desirability Scale. Principal Component Analysis showed the two-factor solution of the Chinese PANPS accounted for 33.42% of the total variance, which was comparable to previous studies. Hierarchical multiple regressions revealed that negative perfectionism significantly predicted all eating disorder symptoms for females, but not drive for thinness and body dissatisfaction for males. Conversely, positive perfectionism significantly predicted lower total EDI scores, lower ineffectiveness and lower interpersonal distrust, but only predicted lower body dissatisfaction among females. In conclusion, negative perfectionism was consistently associated with eating problems whereas positive perfectionism might be a potentially adaptive factor, confirming the distinctive roles each played in the development of eating problems, even in a non-Western population.     

Emotionally-focused therapy and treatment as usual comparison groups in decreasing depression: A clinical pilot study

Abstract

Decades of research have shown that depression can have deleterious effects on couple relationships. Emotionally-focused therapy (EFT; Johnson, 2004 Johnson, S. M. (2004). The practice of emotionally focused couple therapy: Creating connection. East Sussex, UK: Brunner-Routledge. [Google Scholar]) is an empirically validated form of couple therapy, which has shown effectiveness in reducing depressive symptoms in couples where the wife has depression. The aim of the current pilot study was to examine the extent to which EFT and the comparison treatment as usual (TAU) therapy group decrease depressive symptoms in distressed couples. Results show that both groups were effective in decreasing depressive symptoms, with EFT showing a clinically significant reduction. Clinical implications and future research are discussed.     

Influencing and adjusting in daily emotional situations: A comparison of European and Asian American action styles

Emotions are for action, but action styles in emotional episodes may vary across cultural contexts. Based on culturally different models of agency, we expected that those who engage in European-American contexts will use more influence in emotional situations, while those who engage in East-Asian contexts will use more adjustment. European-American (N=60) and Asian-American (N=44) college students reported their action style during emotional episodes four times a day during a week. Asian Americans adjusted more than European Americans, whereas both used influence to a similar extent. These cultural differences in action style varied across types of emotion experienced. Moreover, influencing was associated with life satisfaction for European Americans, but not for Asian Americans.     

Measuring the role of conditioning and stimulus generalisation in common fears and worries

Common and persistent fears may emerge through learning mechanisms such as fear conditioning and generalisation. Although there have been extensive studies of these learning processes in healthy but also psychiatric samples, many of the tasks used to produce conditioning and assess generalisation either use painful and aversive stimuli as the unconditioned stimuli (UCS), or suffer from poor belongingness between the conditioned stimuli and the UCS. Here, we present novel data from a paradigm designed to examine fear conditioning and generalisation in healthy individuals. Two female faces served as conditioned threat cue (CS+) and conditioned safety cue (CS?) respectively. The CS+ was paired repeatedly with a fearful, screaming face (unconditioned stimulus). Generalisation included intermediate faces which varied in their similarity to the CS+ and CS?. We measured eyeblink startle reflex and self-reported ratings. Acquired fear of the CS+ generalised to intermediate stimuli in proportion to their perceptual similarity to the CS+. Our findings demonstrate how fears of new individuals may develop based on resemblance to others with whom an individual has had negative experiences. The paradigm offers new opportunities for probing the role of generalisation in the emergence of common and persistent fears.     

Fathering Self-Efficacy, Marital Satisfaction and Father Involvement in Hong Kong

We examined the predictability of fathering self-efficacy and marital satisfaction on father involvement. The moderating effect of marital satisfaction on the relationship between father efficacy and father involvement was also explored. A cross-sectional survey was conducted using the convenience sampling method. A total of 2,029 valid questionnaires were collected from fathers with children aged 2–6 from 48 nurseries in Hong Kong. The fathers’ mean age is 39.1. 72.9 % of the fathers graduated from secondary school and 86 % had full-time jobs. Measures including self-efficacy subscale in the Parenting Sense of Competency Scale, the Index of Marital Satisfaction, the Inventory of Father Involvement were adopted in the present study. Hierarchical regression analyses showed that fathering self-efficacy and marital satisfaction were significant positive predictors of father involvement, whereas marital satisfaction moderated the effect of fathering self-efficacy on father involvement. It is thus important to improve martial satisfaction and enhance fathering self-efficacy for promoting father involvement. To gain a more comprehensive picture, future studies of father involvement may benefit by adopting a longitudinal research design, including the mothers and children as informants, and addressing other parenting correlates such as parenting stress and spousal support.     

Speaking order predicts memory conformity after accounting for exposure to misinformation

When people discuss their experiences, they can later report seeing things that they never saw, simply because they heard about those things in the discussion. One factor that may contribute to this effect is the order in which people speak; some research has investigated this issue, but it remains unclear whether a relationship exists between memory conformity and speaking order. We explored this question using data from five previous memory conformity experiments. The results provide evidence of an association between speaking order and memory conformity, such that people who spoke first in a discussion were misled less often than people who did not. These results build on previous research by demonstrating that the association could not have been caused by differences in opportunities to be misled. We could not draw conclusions about causality from the exploratory analyses, but ruled out several simple explanations of the results, and considered a variety of social and cognitive mechanisms that might account for the association. Further investigation will be required to tease apart the possible mechanisms that underlie the relationship between speaking order and memory conformity.