成就与不足——浅议郭沫若的《周易》研究

郭沫若的《周易》研究以“新兴科学的观点”来审视《周易》,在古史辩派的基础上,深入到了古代的思想及制度,使传统的经学研究一变而为社会的、文化的和哲学的研究,他不仅开辟了《周易》研究的新领域,而且也成为用《周易》打开认识“古代真实”大门的第一人。这也正是郭沫若《周易》研究的价值所在。但同时郭沫若的《周易》研究也存在不足,如对材料的时代性未能划分清楚,得出了错误的结论;以传解经的错误;疏于考证,有臆测成分及趋时、片面的批评,这也是评价郭沫若的《周易）研究时不可回避的部分。     

关于脑器官库建立的哲学思考

脑器官库是进行神经科学研究物质基础,是联系临床医生和神经科学家的重要纽带。其资料库的内容,即捐献者的生前因素（年龄、性别、节律与季节变化。药物史和濒死状态）和死后因素（死后延搁时间及组织的固定和储存方式）对实验结果所产生的影响,不仅在神经科学研究中具有重要作用,而且为脑科学研究提供了一些值得思考的哲学问题。     

脑死亡判定的伦理学及实践中的几个问题

脑死亡是临床实践中的常见问题,随着当代医学科学的发展,经过临床严格的判定程序,患者脑死亡即生物学死亡已经成为科学标准,但由于我国在脑死亡立法、公众认知以及医生的各种心理考量,在我国开展脑死亡的判定还存在许多障碍。我们结合自己在判定患者脑死亡后的医患心理变化,以及存在的一些问题,期望引起更多的医学、法学和社会学家关注,使得临床医生对脑死亡的判定,顺应科学发展又能符合患者及其家属的最大利益。     

Coordination of complex bimanual multijoint movements under increasing cycling frequencies: The prevalence of mirror-image and translational symmetry

The present study examined the principles underlying inter and intralimb coordination constraints during performance of bimanual elbow–wrist movements at different cycling frequencies (from 0.75 Hz to 2.50 Hz). Participants performed eight coordination tasks that consisted of a combination of in-phase (IN) and/or anti-phase (AN) coordination modes between both elbows and wrists (interlimb), with isodirectional (Iso) or non-isodirectional (NonI) coordination modes within each limb (intralimb). As expected, the principle of muscle homology (in-phase coordination), giving rise to mirror symmetrical movements with respect to the mid-sagittal plane, had a powerful influence on the quality of global coordinative behavior both between and within limbs. When this principle was violated (i.e., when the anti-phase mode was introduced in one or both joint pairs), the non-isodirectional intralimb mode exhibited a (de)stabilizing role in coordination, which became more pronounced at higher cycling frequencies. However, pattern loss with increasing cycling frequency resulted not only in convergence toward the more stable in-phase patterns with the elbows and wrists but also to the anti-phase patterns (which were associated with directional compatibility of within-limb motions). Moreover, participants generally preserved their initial mode of coordination (either in-phase or anti-phase) in the proximal joints (i.e., elbows) while shifting from anti-phase to in-phase (or vice versa) with their distal joint pair (i.e., wrists). Taken together, these findings reflect the impact of two immanent types of symmetry in bimanual coordination: mirror-image and translational symmetry.     

Stress state mediation between environmental variables and performance: The case of noise and vigilance

Effects of environmental variables on performance may be mediated by individual stress states. In this study the effects of jet-aircraft engine noise and signal salience on vigilance performance and self-reported stress state were examined. One hundred and ninety-two (96 female and 96 male) participants were randomly assigned to four experimental conditions consisting of 48 participants each resulting from the factorial combination of signal salience (high and low salience signals) and noise (95 dBA intermittent aircraft noise or quiet). Performance metrics and self-reported stress state (Task Engagement, Distress, and Worry) were collected. Performance in the noise conditions was significantly better than in the quiet conditions. Performance in the high salience conditions was significantly better than the low salience conditions. Noise elevated Task Engagement and low signal salience elevated Distress. Moreover, structural equation model analyses were used to examine stress state mediation between the experimental variables and performance. These analyses indicated Engagement mediates between noise and vigilance performance.     

Effects of luminance change in preview search: Offsets and onsets can be concurrently prioritized but not in isolation

Two experiments are performed to investigate how luminance change contributes to prioritized selection of new over old elements. Experiment 1 demonstrates that observers prioritize items that undergo a luminance change irrespective of the direction of that change. Experiment 2 shows that foreknowledge concerning the direction of luminance change signaling the target does not allow observers to prioritize the selection of luminance onsets over offsets and vice versa. The results suggest that prioritized selection of new over old elements is mediated by a general mechanism that is sensitive to luminance change, irrespective of its direction.     

Le JCR facteur d’impact (IF) et le SCImago Journal Rank Indicator (SJR) des revues françaises : une étude comparative

One of the major functions of academic journals is to contribute to the evaluation of research activities and scientists. Invented more than 50 years ago, the ISI impact factor (IF) became the most important indicator of the quality of journals, in spite of well-known problems and critics such as the over-representation of English-language journals. This is a specific problem for French publishers and scientists; publishing in French is not valorising. Since 2007, the new SCImago Journal Rank Indicator (SJR) offers an alternative to the IF. SJR applies the Google algorithm (PageRank) to the journals of the SCOPUS bibliographic database that indexes more journals than ISI Web of Science. The goal of our study is to compare the two indicators for French academic journals, with three questions: Which is the coverage of French journals by ISI and SCOPUS (title number, scientific disciplines)? Which are the differences of the two indicators IF and SJR for the ranking of French journals? How do they cover the French academic journal publishing market (representativity)? The results of our study of 368 French journals with IF and/or SJR are in favour of the usage of the new indicator, at least as a complement to the IF. (1) Coverage: 166 journals are indexed by ISI (45%), 345 journals are indexed by SCOPUS (94%), 143 journals are indexed by both (39%). 82% of the journals are from STM, 18% are from SS&H. In particular, SCOPUS covers much better the medical and pharmacological sciences. (2) Ranking: The correlation of IF and SJR for the 143 journals with both indicators is high (0.76). The IF better differentiates the journals than the SJR indicator (155 vs. 89 rankings). On the other side, because of the larger source database, more French titles become visible on an international level through SJR than through IF. (3) Representativity: The SJR is more interesting and representative of the French academic journal publishing market than the IF (19% vs. 9%), especially for STM titles (38% vs. 19%), much less for SS&H titles (6% vs. 2%). Nevertheless, ISI (Web of Science) and SCOPUS index journals from only a small part of the French academic publishers (10%–20%). Again, SCOPUS is more representative than the ISI dababase (17% of the publishers vs. 10%). Methodological problems and perspective of a multidimensional evaluation are discussed. Our study compares the ISI impact factor (IF) with the new SJR for 368 French academic journals with IF and/or SJR. The results: The SJR coverage is better than of the IF (94% vs. 45%), especially in medical sciences. The correlation of IF and SJR for journals with both indicators is high (0.76). The IF better differentiates the journals than the SJR indicator (155 vs. 89 rankings). The SJR coverage is more representative of the French academic journal publishing market than ISI/IF (19% vs. 9%), especially for STM titles (38% vs. 19%), less for SS&H titles (6% vs. 2%).     

Attachement père-cadet et qualité des relations fraternelles cadet-aîné

The aim of this study is to establish a link between the father-child attachment and the quality of the sibling relationships for school-age children, by taking into account the theoretical and methodological evolution of this specific attachment. Fifty-seven fathers answered the Questionnaire of Opening up to the World [Défi jeunesse, 8 (2002) 6–12], which defines the father-child attachment (or activation) on two axes: the stimulation (social, cognitive and emotional) and the paternal control exercised over the child. The Questionnaire “Sibling Relationships in Young Children” [Troupel, O., 2006. Attachement fraternel, styles de relations et des interactions de tutelle au sein des fratries de jeunes enfants : effet modulateur de la représentation des relations fraternelles de l’aîné. Thèse de doctorat nouveau régime, université de Toulouse–Le-Mirail] gives insight into the quality of sibships. Children, with a secure attachment to their father, demonstrate a higher level of cooperation with their elder sibling than the other children, in particular those which receive excessive control and little stimulation from their fathers. The hypothesis that the stimulation of the second-born child by the father on the peer side is directly linked to the quality of the sibships is not confirmed. Other results on father-child attachment and sibships are discussed.     

Le vieillissement cognitif et l’hypothèse de l’exercice mental révisée

Although intuitively plausible, the evidence relevant to the mental exercise hypothesis is currently mixed. One of the main controversial issues concerning the investigation of this hypothesis has to do with how cognitive stimulation is assessed. The mental exercise hypothesis was here tested with a subjective and self-reported measure of cognitive stimulation. Overall, results have supported that a greater engagement in cognitively stimulating activities was associated with higher levels of cognitive functioning. However, the rate of cognitive decline with advancing age was not reduced for people who were more mentally active. Of great interest, the subjective measure of cognitive engagement have supported that cognitive demands assessed by participants on activities varied as a function of participants’ cognitive resources: lower cognitive resources were associated with lower perceived cognitive demands.     

Central executive function in mild cognitive impairment: a PET activation study

Using positron emission tomography (PET), we explored the neural correlates of an executive function, dual tasking, in patients with amnestic mild cognitive impairment (aMCI) and in elderly controls. The experiment employed simple auditory and visual tasks that were presented both in isolation and simultaneously to create a task condition requiring enhanced attentional control. Behaviorally, both groups performed well, albeit the patients made more errors on the visual task. The PET analysis focused at prefrontal regions where group differences in task-related activation patterns were expected. During dual task performance, the patients showed attenuated activity in the left inferior frontal region when compared to the controls. This suggests abnormalities in the neural processes underlying attentional control in aMCI.