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161.
S. Chandra M. K. Samal N. N. Kumar V. M. Chavan S. Raghunathan 《Philosophical Magazine Letters》2017,97(12):504-514
The interaction between a brittle crack and pre-existing void in front of the crack tip was studied in the realm of molecular dynamics simulations at the nanoscale in face centred cubic Al within the framework of embedded-atom method. The results provide corroborative evidence of the fact that presence of a void in front of a running crack deters further crack growth. By performing an extensive series of simulations with different void sizes and crack-void distances coupled with statistical analysis, it has been found that (1) major role of voids is to decrease the fracture stress with increasing void size, in addition to slight increase in strain at which the crack growth occurs and the consequent strain to fracture, (2) fracture stress for a constant void size follows a sinusoidal distribution by varying the crack-void distance and (3) it is the void size that is most crucial in dictating the fracture properties of the material, rather than the void placement. 相似文献
162.
The social surrogate hypothesis proposes that people with higher social anxiety (HSA) recruit others to accompany them into social situations. We tested this hypothesis with college roommates using both hypothetical (Study 1) and retrospective (Study 2) measures, while assessing roommate's perceptions of recruitment and how social surrogacy might influence liking between roommates. Across two studies, we found that HSA participants were less likely to enter social situations alone (i.e. higher conditional entry); however, HSA was related to recruitment only when participants considered hypothetical scenarios, not when recruitment was assessed globally or retrospectively. There was little evidence that HSA participants' roommates were aware of these behaviours, although there was preliminary evidence that less social anxiety might increase liking when roommates perceived more conditional entry. We also found preliminary evidence that social anxiety may be negatively related to liking when participants were less likely to recruit an alternate surrogate if their roommate was unavailable. Taken together, these preliminary findings emphasize the importance of studying the surrogacy process from an interpersonal/dyadic perspective and using methods that will differentiate between anticipated (which may be assessed by hypothetical scenarios) and enacted recruitment behaviours. Copyright © 2017 European Association of Personality Psychology 相似文献
163.
Qi Zhang 《Cognitive Systems Research》2005,6(4):320-332
This article, using a counter as an example, explores a novel approach in constructing a cognitive system. The system is a paired memory system of “left and right brain” consisting of a number of memory units. The “left brain” is dedicated to the cognitive process of symbols, and the “right brain” to the representation of the symbols. The left and right subsystems are connected by bundles of internal communication signals. The paired memory system can learn facts and generalize concepts. Its cognitive capability is realized through the communication among these memory units at different cognitive levels within the system. The key claims in this paper are supported by empirical findings and theoretical principles. An AI counter is built and demonstrated in terms of concept learning and responding. 相似文献
164.
Kate Vallance 《Counselling and Psychotherapy Research》2005,5(2):107-110
This qualitative study explores counsellors’ experiences and perceptions of how counselling supervision impacts upon their clients. Data collection combined open‐ended questionnaires (n = 13) and semi‐structured interviews (n = 6). The findings indicate that supervision impacts client work both helpfully and unhelpfully. Areas that emerged as having the most direct impact on client work were the counselling relationship dynamics and self‐awareness, professional development, emotional support, clients not discussed in supervision and the quality of the supervisory relationship. Congruence and confidence were the most direct link between supervision and client work. 相似文献
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166.
心、脑科学与医学人道主义价值观 总被引:1,自引:0,他引:1
兰礼吉 《医学与哲学(人文社会医学版)》2004,25(8):33-34
当今,心、脑科学的研究进展及成果极大支持了科学的医学人道主价值观应当以正确认识、把握、运用脑模式科学假说为基础的观点.试从意识的本质、医学人道价值观的机制、与价值相关的医者心灵的自我控制和意志自由等三个方面探讨心、脑科学同医学实践中的医学人道价值观的关系. 相似文献
167.
颅脑手术戒毒的哲学与伦理思考 总被引:1,自引:0,他引:1
颅脑手术戒毒这项新的医疗技术在社会上引起很大反响,最近被卫生部紧急叫停.从颅脑手术戒毒的历史、存在的问题、哲学及伦理方面进行反思是有必要的.把一项临床科研项目直接变换成一项临床服务项目,既未经严格科学论证也不符合伦理与法规要求. 相似文献
168.
意识和无意识活动的脑区能态理论 总被引:2,自引:0,他引:2
本文在脑的四个功能系统学说的基础上,提出脑区能态理论,研究有意识、无意识和潜意识。讨论有意识、无意识、潜意识的脑机制,指出有意识、无意识、潜意识的统一性。 相似文献
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170.
Preserving integrity against colonization 总被引:1,自引:1,他引:0
Maxine Sheets-Johnstone 《Phenomenology and the Cognitive Sciences》2004,3(3):249-261
Genuine reconciliation between first- and third-person methodologies and knowledge requires respect for both phenomenological and scientific epistemologies. Recent pragmatic, theoretical, and verbal attempts at reconciliation by cognitive scientists compromise phenomenological method and knowledge. The basic question is thus: how do we begin reconciling first- and third-person epistemologies? Because life is the unifying concept across phenomenological and cognitive disciplines, a concept consistently if differentially exemplified in and by the phenomenon of movement, conceptual complementarities anchored in the animate properly provide the foundation for reconciliation. Research by people in neuroscience and in dynamic systems theory substantiate this thesis, providing fundamental examples of conceptual complementarity between phenomenology and science. 相似文献