Temperature dependence of the low-cycle fatigue behaviour of a Cu-SiO2 bicrystal with a [011], 18° twist boundary

The temperature dependence of the low-cycle fatigue behaviour of a Cu bicrystal containing dispersed SiO₂ particles and having a [011], 18° twist boundary has been studied. Failure occurred at shorter times with increasing temperature and stress amplitude. Crack nucleation took place at the particles' surfaces on the grain boundary where slip lines intersected. The crack tended to propagate along primary slip lines and this tendency became stronger as the temperature was increased.     

Analysis of the relation between structure and the superconducting transition in YBa2 Cu3 O∼7

Abstract

It is shown that in the high-T_c YBa₂ Cu₃ O_～7 superconductor the critical temperature is a function of the orthorhombic distortion (b–a)/a of the unit cell. From the extrapolation of the (b - a)/a ratio against T_c , a maximum critical temperature of 66 K for the tetragonal phase of YBa₂ Cu₃ O_～7 was predicted. From the correlation between the transition width δT_c and the orthorhombic distortion there was deduced an upper limit for T_c , in the orthorhombic phase of YBa₂ Cu₃ O_～7 of 94·5K.     

Atomic-scale study of {1 1 2} twin boundary structure in a β-Ti alloy

The atomic structure of {1?1?2} twin boundary in a specialty β-Ti alloy, gum metal, has been studied by means of conventional transmission electron microscopy, bright-field and high-angle annular dark field scanning transmission electron microscopy imaging. The observations provide direct evidence that the {1?1?2} twin boundary has a complex, multiple-layer structure, which is composed of various structural units. These structural units are formed as a result of different degrees of inner atomic-column shifting. The complex structure of the {1?1?2} twin boundary is different to the atomic structure of the previously reported ω phase.     

The Big-5 ± 2? The impact of cognitive complexity on the factor structure of the five-factor model

Despite the popularity and prevalence of the five-factor model (FFM) of personality, numerous questions regarding its psychometric properties have yet to be investigated. One issue of particular concern is the underlying premise that these five personality factors are universally shared by all individuals. The present study examined the impact of cognitive complexity on the FFM by directly assessing whether individuals with higher or lower levels of cognitive complexity have personalities comprised of a greater or lesser number of factors, respectively, than the five widely accepted factors outlined by the FFM. Results indicated that individuals with lower levels of cognitive complexity have personalities best described by a three-factor model, whereas individuals with higher levels of cognitive complexity have personalities best described by a seven-factor model. In light of these findings, the appropriateness of universally applying the FFM to individuals of differing levels of cognitive complexity is discussed.     

The Big-5 ± 2? The impact of cognitive complexity on the factor structure of the five-factor model

Despite the popularity and prevalence of the five-factor model (FFM) of personality, numerous questions regarding its psychometric properties have yet to be investigated. One issue of particular concern is the underlying premise that these five personality factors are universally shared by all individuals. The present study examined the impact of cognitive complexity on the FFM by directly assessing whether individuals with higher or lower levels of cognitive complexity have personalities comprised of a greater or lesser number of factors, respectively, than the five widely accepted factors outlined by the FFM. Results indicated that individuals with lower levels of cognitive complexity have personalities best described by a three-factor model, whereas individuals with higher levels of cognitive complexity have personalities best described by a seven-factor model. In light of these findings, the appropriateness of universally applying the FFM to individuals of differing levels of cognitive complexity is discussed.     

Atomic structure and solute segregation of a Σ = 3, [110]/{111} grain boundary in an yttria-stabilized cubic zirconia bicrystal

The atomic structure and chemical composition of a =3, [110]/{111} symmetric tilt grain boundary in an yttria-stabilized cubic zirconia bicrystal has been investigated by high-resolution transmission electron microscopy (HRTEM) and nanoprobe energy-dispersive X-ray spectroscopy. The experimental HRTEM images are compared with simulated images for a model obtained by lattice statics calculations. It is found that the grain boundary has two individual mirror symmetrical planes in cation and anion sublattices. In this case, the cations are forced to form sevenfold coordination in the vicinity of the boundary owing to the restraint of the boundary structure, while the cations in the cubic fluorite structure have eightfold coordination. The segregation of yttrium ions was experimentally detected at the = 3 boundary, a finding that is considered to be closely related to the change in the local coordination at the boundary.     

“It's the Day-to-Day Living That Matters”: The Meaning and Process of Community in the Lives of a Couple with Significant Psychiatric Disabilities

This study attempts to define and describe the experience and process of community and community participation using a qualitative case study of a couple labeled with significant psychiatric disabilities. Findings indicate that important influences on perceptions and the process of community belonging include (a) the opportunity to personally define the meaning, limitations, and level of care associated with receiving a psychiatric label; (b) a reciprocal, central relationship; and (c) recognized opportunities for intentional participation in and access to meaningful relationships with other community members, including in the role of coworker or colleague.     

The height of a stereokinetic cone: A quantitative determination of a 3-D effect from 2-D moving patterns without a “rigidity assumption”

Summary When a circular disc with an eccentric dot painted on it is set in slow circular motion, a three-dimensional solid object appears to the observer: the stereokinetic cone. The cone shows a well-defined height and tilt. All current theories of how the visual system can extract 3-D percepts from 2-D moving patterns, are based on a rigidity assumption hypothesis. But this assumption cannot explain why the stereokinetic cone appears to have a well-defined height. An alternative hypothesis is proposed here, which avoids the rigidity assumption and is based on a minimization process of the relative velocity differences between all the points of the rotating pattern. The hypothesis allows a quantitative prediction of the stereokinetic cone height both when the rotating disc is circular and when it is elliptical. The predictions are in good agreement with previously reported experimental results and with our own observations.     

The Impact of a Child’s Cancer on the Father’s Relationship with His Spouse in Korea

A father of a child with cancer experiences psychological stress related to his child’s cancer diagnosis and treatment, which may affect his relationship with his spouse. Nevertheless, little attention has been paid to how having a child with cancer affects the marital relationship from the perspective of the father. We examined the impact of the child’s cancer on the father’s relationship with his spouse in Korea. We conducted in-depth interviews with 20 fathers (mean age?=?41.35 years; SD?=?4.49) of children who were diagnosed with cancer before the age of 19 and were within 5 years of the diagnosis. The mean age of the child with cancer was 9.1 years (SD?=?3.68), and the mean age at diagnosis was 6.4 years (SD?=?4.08). The analysis of the interviews revealed the following four themes (and eight subthemes): conflicts between spouses (lack of father’s participation in caregiving, financial and work-related stress), mental suffering (heartbroken, torn between caregiving and work), change in communication (child-focused communication, avoiding communication), and change in the marital relationship (neglected relationship, new trust built in the relationship). A father’s increased conflict in the marital relationship after his child’s diagnosis of cancer was intensified by his limited involvement in child care and parenting responsibilities. An understanding of the change in the father’s relationship with his spouse can inform the development of a psychosocial intervention that may strengthen a father’s emotional intelligence and resilience, which could improve the marital relationship.     

Is a life without meaning satisfying? The moderating role of the search for meaning in satisfaction with life judgments

Results from two studies revealed that the relation between meaning in life and life satisfaction was moderated by the extent to which the rater was searching for meaning in his or her life. In Studies 1a and 1b, the presence of meaning was more strongly related to life satisfaction for those who were actively searching for meaning in life than for those who were not. Study 2 extended the finding to judgments concerning a fictitious target's life satisfaction based on experimentally manipulated information regarding meaning in life. Thus, the role of meaning in life satisfaction judgments varies across individuals, depending on the level of search for meaning in life. These results suggest that search for meaning behaves like a schema increasing the salience of meaning-relevant information, and provides new ways of understanding people's efforts to establish meaningful lives.     

“Yeah that Made a Big Difference!”: The Importance of the Relationship between Health Professionals and Fathers Who Have a Child with Down Syndrome

Evidence suggests that medical services do not reflect the increased involvement of fathers in childcare, a discrepancy that can often lead to feelings of exclusion and inequality. Fathers who have a child with Down syndrome may encounter many different health professionals during their child’s life, therefore it is important to consider this relationship, and investigate the factors that influence their experiences. This is particularly important because the limited research focusing on fathers suggest that those who have a child with Down syndrome can experience increased stress levels and lasting feelings of loss and grief. It is therefore important to address their relationships with health professionals, as these may be a significant resource to prevent these feelings. This study used interpretative phenomenological analysis (IPA) to explore the experiences of seven fathers who have a child with Down syndrome, focusing on their interactions with health professionals. The analysis showed that the major factors associated with negative experiences were feelings of exclusion, receiving overly negative information about the condition and a perceived lack of on-going support. Positive experiences were associated with being made to feel like an equal parent, being given direct/clear information and being congratulated on the birth of their child. These results provide an insight into what fathers expect in terms of their own and their child’s care and highlight that health professionals have an important and extensive role in influencing fathers’ experiences of Down syndrome.     

The effects of conversation on attention and peripheral detection: Is talking with a passenger and talking on the cell phone different?

In this study conversation with a remote person (hands-free phone), an in-vehicle person (passenger), and a no conversation (baseline) condition were compared on measures of attention and peripheral detection. We held conversation pace constant so that any difference found in attention or peripheral detection could be attributed to the distinctive feature of the type of conversation (remote, in-vehicle). The difficulty level of the verbal task was included as a second independent variable. Forty-eight undergraduate students participated in all conditions of a within-subjects design. The results revealed that conversation resulted in slower reactions and fewer correct responses on both attention and Peripheral Detection tasks compared to no conversation, while conversation type (remote/in-person) did not make a significant difference. Difficulty of the verbal task affected performance on the Peripheral Detection task but not on the attention task. These findings imply that conversation has a negative effect on attention and peripheral detection which are important components of driving. This effect may be greater with difficult conversations.     

The influence of perceptual and semantic categorization on inhibitory processing as measured by the N2–P3 response

In daily activities, humans must attend and respond to a range of important items and inhibit and not respond to unimportant distractions. Our current understanding of these processes is largely based on perceptually simple stimuli. This study investigates the interaction of conceptual-semantic categorization and inhibitory processing using Event Related Potentials (ERPs). Participants completed three Go–NoGo tasks that increased systematically in the degree of conceptual-semantic information necessary to respond correctly (from single items to categories of objects and animals). Findings indicate that the N2 response reflects inhibitory processing but does not change significantly with task difficulty. The P3 NoGo amplitude, on the other hand, is attenuated by task difficulty. Further, the latency of the peak of the P3 NoGo response elicited by the most difficult task is significantly later than are the peaks detected during performance of the other two tasks. Thus, the level of complexity of conceptual-semantic representations influences inhibitory processing in a systematic way. This inhibition paradigm may be a key for investigating inhibitory dysfunction in patient populations.     

The Prophet’s Letter to al-ʿAlāʾ b. Al-Ḥaḍramī: An Assessment of Its Authenticity in Light of the Covenants and the Correspondence with the People of Yemen

The letter to al-?Alā? b. al-?a?ramī embodies a number of parallels to the covenants and to the Prophet Mu?ammad's correspondence with the people of Yemen. This study examines the different versions of the letter that have come down to us from the Musnad of al-?ārith b. Abī Usāma and from a recension from al-?abarānī's Al-mu?jam al-kabīr to reconstruct a critical edition. Having translated the critical edition and analysed its contents, the study then concludes that the letter is in all likelihood authentic and that it is, generally speaking, textually accurate. The implication of this is that the letter and the covenants represent mutual attestations of one another and that the religion of Islam was well-established, having attained a great level of maturity in the Prophet's lifetime.