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411.
Hidetoshi Somekawa Kiyomi Nakajima Alok Singh Toshiji Mukai 《Philosophical Magazine Letters》2013,93(11):831-839
The ductile fracture mechanism in a fine-grained magnesium alloy has been investigated by transmission electron microscopy-focused ion beam techniques. In coarse-grained or conventional magnesium alloys, twins form at the very beginning of the deformation process, and crack propagation occurs through the twin boundaries. However, in the alloy used in this study, subgrain structures were found instead of twins at the crack tip. Nanoscale twins formed subsequently owing to large stress in the crack propagation route. The fine-grained alloys showed high fracture toughness resulting from resistance to the twins at the beginning of the deformation. 相似文献
412.
Alok Singh A. P. Tsai M. Nakamura M. Watanabe A. Kato 《Philosophical Magazine Letters》2013,93(9):543-551
Extensive microstructural studies have been performed with respect to the formation of the icosahedral quasicrystalline phase and its relationship to other phases in Mg 95 Zn 4.2 Y 0.8 alloy. The icosahedral phase forms as an intergranular eutectic phase as well as precipitates in the matrix. The precipitates are nanosized (typically 50 nm) with a definite orientation relationship with the matrix, sharply faceted on twofold planes which are on the basal and prismatic planes of the matrix. The detailed crystallographic relationship with the matrix is described. The icosahedral phase is occasionally found to coexist with the cubic W-Zn 3 Mg 2 Y 3 phase with a definite crystallographic relationship. 相似文献
413.
Marta Wnuczko John M. Kennedy Matthias Niemeier Karan Singh 《Psychonomic bulletin & review》2013,20(1):95-100
Observers were instructed to point with their right arm to a mirror image of their left shoulder. Instead of pointing to the target with their real arm, they occluded the target with their mirror-imaged finger, and their real finger pointed off to the left side of the target, facts that came as a surprise to them in debriefing. The occlusion by a mirror image finger was not done to avoid double images, since it occurred in monocular conditions. That it is due to planning before pointing can be inferred from the fact that it occurred in blindfolded conditions. 相似文献
414.
Stephen D. Edwards Sumeshni Govender Dumisani R. Nzima Mandla M. Hlongwane Jabulani D. Thwala Ashmin Singh 《Journal of Psychology in Africa》2013,23(4):639-641
This study examines Self contemplation from a heuristic phenomenological and applied psychological perspective using a participatory action research approach. The participant authors (n = 6; females = 50%, majority ethnicity = isiZulu = 67%) engaged in reflective contemplation of the Self to generate qualitative data that captured its core features and psychological applications. The data were thematically analyzed. Core features of the Self were revealed in contemplative, spiritual, ancestral, healing and psychotherapeutic themes. Specific psychological applications consisted of various universal characteristics of healing including the therapeutic relationship, therapeutic moments, integrity, dialogue, authenticity, intentionality, will, belief, practice and breath-work. 相似文献
415.
Severe, compared to mild, harm results in harsher punishment. According to the model of people as intuitive prosecutors, the severity effect is a deterrence message. The authors tested this hypothesis in two studies in Singapore. In Study 1, participants learnt about the severity of harm arising from an accidental or intentional act, and expressed anger, made attributions, assigned blame, recommended compensation by and imprisonment of the offender, and indicated the degree to which they were guided by the punishment goals of deterrence and retribution. As hypothesized, the prosecutorial mindset was multidimensional, and the deterrence goal mediated the severity effect on punishment. In Study 2, the severity effect held when the punishment goal was unspecified but not when it was experimentally specified as deterrence. 相似文献
416.
Bailey TK Chung YB Williams WS Singh AA Terrell HK 《Journal of counseling psychology》2011,58(4):481-493
This article describes the development and validation of the Internalized Racial Oppression Scale (IROS) for Black individuals in 2 studies using a total sample of 468 Black college students. The IROS is intended to measure the degree to which racial oppression is internalized and replicated by Black individuals in the United States. An exploratory factor analysis suggested a five-factor solution: Belief in the Biased Representation of History (BRH), Devaluation of the African Worldview and Motifs (DAW), Alteration of Physical Appearance (APA), Internalization of Negative Stereotypes (INS), and Hair Change (HC). Confirmatory factory analysis supported an adequate model fit of a four-factor model: BRH, APA, INS, and HC. All factors of the IROS were positively correlated with the Pre-Encounter subscale of the Racial Identity Attitude Scale (RIAS-B; J. E. Helms & T. A. Parham, 1996), and 4 of the factors were negatively correlated with the Immersion/Emersion subscale of the RIAS-B. Four factors of the IROS were negatively correlated with all subscales and total scores of the African Self-Consciousness Scale (J. A. Baldwin & Y. R. Bell, 1985). These results provide some support of the validity of the IROS. 相似文献
417.
This content analysis examines the qualitative methodology used in counseling research with lesbian, gay, bisexual, transgender, and queer (LGBTQ) issues published over the last 10 years (1998–2008) in 4 counseling and counseling psychology journals (Journal of Counseling & Development, Journal of Counseling Psychology, Journal of LGBT Issues In Counseling, and The Counseling Psychologist). LGBTQ qualitative investigations in counseling research continue to be rare. Recommendations to increase the trustworthiness and scope of future LGBTQ counseling research are provided. 相似文献
418.
Infants' abilities to discriminate native and non-native phonemes have been extensively investigated in monolingual learners, demonstrating a transition from language-general to language-specific sensitivities over the first year after birth. However, these studies have mostly been limited to the study of vowels and consonants in monolingual learners. There is relatively little research on other types of phonetic segments, such as lexical tone, even though tone languages are very well represented across languages of the world. The goal of the present study is to investigate how Mandarin Chinese-English bilingual learners contend with non-phonemic pitch variation in English spoken word recognition. This is contrasted with their treatment of phonemic changes in lexical tone in Mandarin spoken word recognition. The experimental design was cross-sectional and three age-groups were sampled (7.5months, 9months and 11months). Results demonstrated limited generalization abilities at 7.5months, where infants only recognized words in English when matched in pitch and words in Mandarin that were matched in tone. At 9months, infants recognized words in Mandarin Chinese that matched in tone, but also falsely recognized words that contrasted in tone. At this age, infants also recognized English words whether they were matched or mismatched in pitch. By 11months, infants correctly recognized pitch-matched and - mismatched words in English but only recognized tonal matches in Mandarin Chinese. 相似文献
419.
Fan Z Singh K Muthukumaraswamy S Sigman M Dehaene S Shapiro K 《Psychological research》2012,76(5):566-578
As Turing (1936, Proceedings of the London Mathematical Society) noted, a fundamental process in human cognition is to effect chained sequential operations in which the second operation requires an input from the preceding one. Although a great deal is known about the costs associated with 'independent' (unrelated) operations, e.g., from the classic psychological refractory period paradigm, far less is known about those operations to which Turing referred. We present the results of two behavioural experiments, where participants were required to perform two speeded sequential tasks that were either chained or independent. Both experiments reveal the reaction time cost of chaining, over and above classical dual-task serial costs. Moreover, the chaining operation significantly altered the distribution of reaction times relative to the Independent condition in terms of an increased mean and variance. These results are discussed in terms of the cognitive architecture underlying the serial chaining of cognitive operations. 相似文献
420.
Research on workplace bullying, which has just recently passed the 20 year mark, has grown significantly over this duration of time. We provide an extensive review of the extant literature, with a focus on the antecedents and consequences of workplace bullying. We organize our review of the extant literature by level of analysis, which allows us to understand workplace bullying from each major level of analysis, while simultaneously identifying those levels at which research has been sparse. We then develop a conceptual model based on our review that similarly depicts theoretical and/or empirical findings from the extant literature, but in a succinct manner. Based on our review and conceptual model, we identify and highlight a number of key avenues for future research that will help extend the current workplace bullying literature. 相似文献