Effect of cooling rate on size-dependent atomic ordering of CoPt nanoparticles

We report on the effect of cooling rate on the size-dependent atomic ordering of CoPt nanoparticles using aberration corrected high-resolution transmission electron microscopy. It was found that cooling rate plays a crucial role in promoting atomic ordering during the cooling process after annealing. Nanoparticles of ≈3?nm in diameter show the A1-disordered phase after annealing at 873?K for 1?h followed by rapid cooling (110?K/min), while the L1₀-ordered phase is obtained when the cooling rate is slow (1.5?K/min). The disordered phase is also obtained by rapid cooling after annealing at 973?K for 1?h. These results unambiguously indicate that the order–disorder transformation temperature is reduced to a temperature at least lower than 873?K for CoPt nanoparticles smaller than 3?nm in diameter. The slow cooling process promotes the atomic ordering, which resulted in an enhancement of magnetic coercivity as high as 2200?Oe. This study demonstrates that hard magnetic properties of the CoPt nanoparticles can be improved by controlling the cooling rate after heat treatments.     

Healers,Leaders and Entrepreneurs: Shamanic Revival in Southern Siberia

While it is generally agreed that in the postmodern world all tradition is invented, in many post-colonial contexts the emerging identities are spelled out in the idiom of ‘traditional heritage’. This article considers the social field of ‘shamanism’ as it has been shaped in the post-Soviet years in Tuva, an autonomous republic within the Russian Federation in Southern Siberia, and analyses Tuvan shamanism as a product of local historical and social forces, and global processes. Based on both the ethnography of the organisational structure of contemporary Tuvan shamanism, and portraits of different categories of practitioners, the article analyses continuity and change in various aspects of what is locally seen as ‘traditional knowledge’, and discusses different skills, orientations, and divisions of labour among the practitioners. Shamanism in post-Soviet Siberia is seen as a postmodern religious movement enmeshed in global structures and processes, and it is only in this context that a local tradition can become alive and meaningful again.     

A Review of Reviews Examining Neurological Processes Relevant to Impact of Parental PTSD on Military Children: Implications for Supporting Resilience

In this study, 10 recent meta-analytic and systematic review studies were synthesized on the neurological underpinnings of stress and trauma with implications for the impact of parental post-traumatic stress disorder (PTSD) and resilience among military children. Following Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) group guidelines and utilizing a validated quality assessment tool, this systematic review of reviews incorporated results from more than 35,971 individuals with stress exposures, effects, or disorders and healthy controls. This synthesis found support for important gene, physiology, and environment correlations and interactions that predict increased risk for stressful life events and PTSD, but not direct transmission, among military children. Future research is needed to determine if these constitute indirect pathways of intergenerational transmission in military children.     

Intergenerational Transmission of Trauma-Related Distress: Maternal Betrayal Trauma,Parenting Attitudes,and Behaviors

The purpose of this study was to elucidate mechanisms involved in the intergenerational transmission of trauma-related distress. This study investigated whether betrayal trauma (BT; abuse by a person close to the victim) and specific parenting attitudes and behaviors among mothers with child abuse histories predicted internalizing and externalizing symptoms in their children. Mothers and children (ages 7–11) were recruited for a project on parenting and stress (N = 72). Maternal betrayal trauma predicted both internalizing (β = 0.33, p < .01) and externalizing symptoms (β = 0.25, p < .05) even when controlling for mothers’ trauma-related symptoms. Negative attitudes toward limit setting predicted externalizing symptoms (β = ?0.33, p < .05). Poorer communication (β = ?0.39, p < .05) but higher parenting satisfaction (β = 0.38, p < .01) predicted internalizing symptoms. These findings demonstrate the importance of assessing maternal trauma and parenting characteristics as part of interventions with symptomatic children.     

工作场所无礼行为的溢出和交叉效应:超越职场范围的负性作用机制

以往研究通常考查工作场所无礼行为对接收者个人和工作场所内相关结果的影响。而近来研究指出,无礼行为会超出工作场所的界限产生溢出效应,且工作场所无礼行为会对接收者之外的他人产生消极作用,即工作场所无礼行为的交叉效应。在综述国内外相关文献的基础上,总结出了溢出和交叉效应的产生机制,包括消极情绪和情感在无礼行为溢出效应中的中介机制,以及压力传递在无礼行为引发的消极情绪和行为反应与工作-家庭冲突中的中介角色;深入探讨了共情在无礼行为交叉效应中的调节机制和社会阻抑在无礼行为交叉效应中的中介机制;并建议未来相关研究选取新的结果变量视角、探究新的中介机制和边界条件以及进一步整合无礼行为的溢出和交叉的连锁效应机制     

Impact of maternal adverse childhood experiences on child socioemotional function in rural Kenya: Mediating role of maternal mental health

Mothers in low‐ and middle‐income countries (LMIC) suffer heightened vulnerability for adverse childhood experiences (ACEs), which is exacerbated by the multitude of risk factors associated with poverty and may lead to increased risk of psychiatric disorder. The constellation of complex, co‐occurring biological, environmental, social, economic and psychological risk factors are in turn transmitted to her child, conferring vulnerability for adverse development. This study examines the association between maternal intra‐ and extra‐familial ACEs, maternal education and the mental health of her child, mediated by maternal mental health. Mother‐child dyads (n = 121) in Machakos, Kenya were examined cross‐sectionally using self‐report measures of ACEs, maternal mental health and child internalizing and externalizing mental health problems. The four models proposed to examine the relationship between intra‐ and extra‐familial maternal ACEs and child internalizing and externalizing problems demonstrated indirect pathways through maternal mental health. These effects were found to be conditional on levels of maternal education, which served as a protective factor at lower levels of maternal ACEs. These models demonstrate how the impact of ACEs persists across the lifespan resulting in a negative impact on maternal mental health and conferring further risk to subsequent generations. Elucidating the association between ACEs and subsequent intergenerational sequelae, especially in LMIC where risk is heightened, may improve targeted caregiver mental health programs for prevention and intervention.