Connection between deformation-induced dislocation substructures and martensite formation in stainless steel

We report a quantitative connection between the strain amplitude dependencies of the organisation of dislocation cell substructures with the formation of deformation-induced martensite during cyclic plasticity of austenitic stainless steel at ambient temperature.     

Phonon densities of states of gamma-cerium and delta-cerium measured by time-of-flight inelastic neutron scattering

Time-of-flight inelastic neutron scattering spectra were measured on cerium metal at temperatures near the fcc (gamma)-to-bcc (delta) transition temperature. Phonon density-of-states (DOS) curves were extracted from data acquired over a wide range of momentum transfers. A large softening of the phonon DOS was found in going from gamma-cerium to delta-cerium, and this accounts for an increase in vibrational entropy of (0.71 +/- 0.05)k _B/atom. To be consistent with the latent heat of the gamma-delta transition, this increase in vibrational entropy must be accompanied by a large decrease in electronic entropy. The results not only confirm the recent discovery of a significant electronic contribution to the gamma-delta transition but also suggest that it may be twice that previously reported.     

Interplay of diffusion and phase transformations in microstructural evolution of the interaction zone between U–9 wt.% Mo and Zr–1 wt.% Nb alloys

Metallurgical interaction between U–9?wt.% Mo metallic fuel alloy and Zr–1?wt.% Nb clad material has been assessed. Interdiffusion of constituent elements across their interface, together with the phase reactions occurring at high temperature and during subsequent cooling, resulted in development of a layered interaction zone where coexistence of a bcc solid solution phase with varying compositions, along with α-U, α-Zr and Mo₂Zr phases could be noticed.     

The intergenerational transmission of need for closure underlies the transmission of authoritarianism and anti-immigrant prejudice

Previous research has identified need for closure (NFC) as an important motivational-cognitive basis of authoritarianism and prejudice. However, to date, the role of NFC in the intergenerational similarity in authoritarianism and prejudice has remained unclear. In a sample of 169 parent–child dyads, we investigated the similarity between parents and children in NFC and tested whether this intergenerational similarity may account for the intergenerational similarity in authoritarianism and anti-immigrant prejudice. Our results revealed that parental levels of NFC were indeed concordant with the levels of NFC in their children. Even more importantly, parental NFC was indirectly related to child authoritarianism and prejudice in two ways. The first pathway proceeded through the direct relationships between parental and children’s levels of authoritarianism and prejudice. The second pathway, however, bypassed parental levels of authoritarianism and prejudice and proceeded through the intergenerational similarity in NFC. Our findings thus indicate that a significant portion of children’s levels of authoritarianism and anti-immigrant prejudice can be explained by parent–child similarity in motivated cognition. Implications for developmental theories of prejudice acquisition are discussed.     

Maternal Intergenerational Transmission of Childhood Multitype Maltreatment

Previous research suggests that child maltreatment is transmitted across familial generations. However, extant studies focused exclusively on single maltreatment subtypes, instead of the more common experience of multitype maltreatment. This limitation is addressed in the first known study to examine the maternal intergenerational transmission of childhood multitype maltreatment among 104 mothers and their children. Findings demonstrated that mothers' childhood multitype maltreatment directly predicted their children's multitype maltreatment, instead of having indirect effects through maternal romantic attachment dimension, intimate partner violence, and psychological distress. Mothers' childhood multitype maltreatment was also related to intimate partner violence and anxious romantic attachment but unrelated to psychological distress. Our findings highlight the need for clinical attention to the long-term generational effects of diverse childhood traumas.     

Visual impressions of generative transmission

ABSTRACT

Previous research has shown that stimuli in which a moving object (A) contacts a stationary one (B) and stops, and object B then moves off in the same direction, give rise to a causal impression: object A is perceived as producing the motion of object B. This impression is weakened or does not occur if there is a delay between A contacting B and B moving, or if there is a spatial gap between B and the location at which A stops. It is shown that a strong causal impression can occur despite the presence of both gap and delay if there are cues to generative transmission of causal influence from A to B. The cues investigated were successive colour change of a series of objects filling the gap between A and B. Reported causal impressions were stronger with the colour change stimuli than with stimuli in which the objects were present but did not change colour, and stronger if the colour change proceeded from A to B than if it proceeded in the opposite direction. Reported causal impressions increased in strength as the number of objects involved in the colour change increased, consistent with the hypothesis that the colour change is a cue to a process of transmission, and inconsistent with the hypothesis that it is perceived or inferred as involving a chain of causal relations. Other kinds of changes to object properties—a small upward motion, shrinkage without moving, and disappearance—yielded similar results. It appears that any rapid sequential change in object properties in the direction of causal influence can function to give rise to the visual impression of generative transmission. The possible role of apparent motion is discussed.     

Nationwide survey of contraceptive and sexually transmitted infection knowledge,attitudes and skills of university students in Portugal

Sexually transmitted infections and (STIs) unintended pregnancies are contemporary public health concerns. Understanding factors (e.g. knowledge, attitudes and skills) influencing sexual behaviours of university students are critical to develop targeted and tailored risk-reduction interventions for this vulnerable population. Thus, the goals of this study were to describe sexual behaviours and analyze differences between genders for sexual behaviours; to identify whether differences exist between genders and age groups regarding knowledge, attitudes and skills concerning contraceptive methods and STIs, and to evaluate the association of knowledge with attitudes and skills with sexual behaviour among university students in Portugal. The sample included 3278 students. Results show that the majority were sexually active and use condoms and oral contraceptives. In general, university students have high knowledge, positive attitudes and skills about contraception and STIs. Gender analyses indicated that women had greater knowledge, and more favourable attitudes, and higher skills toward contraceptive and STI preventive behaviour College students, in particular, face new challenges in sexual health and would benefit from more comprehensive education aimed at promoting healthy decision-making about family planning and STI prevention.     

Resolving individual Shockley partials of a dissociated dislocation by STEM

A practical method was developed to image detailed features of defects in a crystal using STEM. This method is essentially a STEM version of the conventional CTEM g/3g weak beam dark field (WBDF) method. The method was successfully applied to resolving individual Shockley partials of a dissociated dislocation in a Cu-6.44at.%Al alloy.