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91.
This article is concerned with the role of prosody in discourse. Three experiments explored the relationship between inspiration, declination, and syntactic boundaries in normal and RHD participants. Fundamental frequency and intensity were measured at the beginning and end of breath units excised from conversational samples. The results revealed evidence of declination of intensity in all samples measured. However, resetting of fundamental frequency was observed only in the samples of normal participants and then only when a breath coincided with the beginning of a sentence. The results suggest that resetting and declination play separate roles in discourse parsing. 相似文献
92.
Two experiments were conducted to examine the ability of left- (LHD) and right-hemisphere-damaged (RHD) patients and normal controls to use temporal cues in rendering phrase grouping decisions. The phrase "pink and black and green" was manipulated to signal a boundary after "pink" or after "black" by altering pre-boundary word durations and pause durations at the boundary in a stepwise fashion. Stimuli were presented to listeners auditorily along with a card with three alternative groupings of colored squares from which to select the presented alternative. Results revealed that normal controls were able to use both temporal cues to identify the intended grouping. In contrast, LHD patients required longer than normal pause durations to consistently identify the intended grouping, suggesting a higher than normal threshold for perception of temporal prosodic cues. Surprisingly, the RHD patients exhibited great difficulty with the task, perhaps due to the limited acoustic cues available in the stimuli. 相似文献
93.
心理应激与DNA损害 总被引:1,自引:0,他引:1
心理应激不仅能使人的行为特征发生变化,而且也能使人的生理状况发生改变,因此,被认为是某些身心疾病的诱因。在此过程中,DNA损害是心理应激造成的最终结果之一。有关DNA损害,虽然以往的研究者以人或动物为对象进行了一系列急性应激和慢性应激的实验研究,但是,心理应激是如何造成DNA损害的过程还不清楚,具体的生理心理机制还未阐明。该文利用健康心理学提出的理论模型对此进行了分析,阐述了心理应激与DNA损害之间联系的可能的机制,强调了氧化应激在这一过程中的重要作用。同时,为临床制订预防疾病的干预措施提供了思路 相似文献
94.
《Zygon》2000,35(1):189-211
Books reviewed: Science and Theology: An Introduction, by JohnPolkinghorne Genesis, Genes, and God: Values and Their Origins in Naturaland Human History, by Holmes Rolston, III Playing God? Genetic Determinism and Human Freedom, by Ted Peters Green Space, Green Time: The Way of Science, by Connie Barlow Reconstructing Nature: The Engagement of Science and Religion , by John Brooke and GeoffreyCantor Whatever Happened to the Soul? Scientific and Theological Portraits ofHuman Nature, Edited by Warren S. Brown, Nancey Murphy, and H.Newton Malony The Turn of the Millennium: An Agenda for Christian Religion in an Age of Science, by Jeffrey G. Sobosan God without the Supernatural: A Defense of Scientific Theism, by Peter Forrest Religion and Creation, by Keith Ward 相似文献
95.
96.
Lindon Eaves 《Zygon》1991,26(4):495-503
Abstract. Arthur Peacocke's seminal contribution to the dialogue between science and theology is considered along three dimensions: epistemology, anthropology, and the concept of God. It is suggested that his view of a \"hierarchy of disciplines\" (1) may not completely characterize the way theology interacts with science, and (2) could limit the creative friction between them. His emphasis on humans as \"more than\" DNA could result in an anthropology that fails to exploit insights that biology could shed on theological puzzles as the impact of genetics is more widely appreciated. His concept of God may also need to be modified more radically to express our understanding of nature in an age of genetics. 相似文献
97.
Mary Jo Rattermann Lee Spector Jordan Grafman Harvey Levin Harriet Harward 《Cognitive Science》2001,25(6):941-975
98.
BackgroundIntensive task-specific training is promoted as one approach for facilitating neural plastic brain changes and associated motor behavior gains following neurologic injury. Partial body weight support treadmill training (PBWSTT), is one task-specific approach frequently used to improve walking during the acute period of stroke recovery (<1 month post infarct). However, only limited data have been published regarding the relationship between training parameters and physiologic demands during this early recovery phase.ObjectiveTo examine the impact of four walking speeds on stride characteristics, lower extremity muscle demands (both paretic and non-paretic), Borg ratings of perceived exertion (RPE), and blood pressure.DesignA prospective, repeated measures design was used.MethodsTen inpatients post unilateral stroke participated. Following three familiarization sessions, participants engaged in PBWSTT at four predetermined speeds (0.5, 1.0, 1.5 and 2.0 mph) while bilateral electromyographic and stride characteristic data were recorded. RPE was evaluated immediately following each trial.ResultsStride length, cadence, and paretic single limb support increased with faster walking speeds (p ⩽ 0.001), while non-paretic single limb support remained nearly constant. Faster walking resulted in greater peak and mean muscle activation in the paretic medial hamstrings, vastus lateralis and medial gastrocnemius, and non-paretic medial gastrocnemius (p ⩽ 0.001). RPE also was greatest at the fastest compared to two slowest speeds (p < 0.05).ConclusionsDuring the acute phase of stroke recovery, PBWSTT at the fastest speed (2.0 mph) promoted practice of a more optimal gait pattern with greater intensity of effort as evidenced by the longer stride length, increased between-limb symmetry, greater muscle activation, and higher RPE compared to training at the slowest speeds. 相似文献
99.
Motomichi Koyama Cemal Cem Tasan Tatsuya Nagashima Eiji Akiyama Dierk Raabe Kaneaki Tsuzaki 《Philosophical Magazine Letters》2016,96(1):9-18
For understanding the underlying hydrogen embrittlement mechanism in transformation-induced plasticity steels, the process of damage evolution in a model austenite/martensite dual-phase microstructure following hydrogenation was investigated through multi-scale electron channelling contrast imaging and in situ optical microscopy. Localized diffusible hydrogen in martensite causes cracking through two mechanisms: (1) interaction between {1?1?0}M localized slip and {1?1?2}M twin and (2) cracking of martensite–martensite grain interfaces. The former resulted in nanovoids along the {1?1?2}M twin. The coalescence of the nanovoids generated plate-like microvoids. The latter caused shear localization on the specific plane where the crack along the martensite/martensite boundary exists, which led to additional martensite/martensite boundary cracking. 相似文献
100.
We studied the heavy ion radiation tolerance of amorphous silicon oxycarbide (SiOC) alloys by in situ Kr ion irradiation within a transmission electron microscopy. The amorphous SiOC thin films were grown via co-sputtering from SiO2 and SiC targets on a surface-oxidized Si (100) substrate. These films were irradiated by 1 MeV Kr ions at both room temperature and 300 °C with damage levels up to 5 displacements per atom (dpa). TEM characterization shows no sign of crystallization, void formation or segregation in all irradiated samples. Our findings suggest that SiOC alloys are a class of promising radiation tolerant materials. 相似文献