华侨华人学的学科定位与研究对象

本文力图从国际学术界传统学科体系的分解与整合这一角度来分析建立华侨华人学的现实性 ,并从局限性、可行性、研究对象的定位及辨识标准、研究范围、挑战与机遇等五个方面进行了分析。由于其特定的研究对象和无法进行科学抽象的特征 ,从传统的学术分类来看 ,华侨华人研究不可能成为独立的学科。然而 ,学术史的演变表明 ,一些多学科或跨学科的研究领域日益独立出来 ,这为华侨华人学的建立提供了条件。作者对“华侨华人学”下了定义 ,并提出了建立作为学科分支的华侨华人学的两种可能途径。     

Short-chain n-alkanes (C16–20) in ancient soil are useful molecular markers for prehistoric biomass burning

The incorporation of plant biomass into soil usually leads to long-chain n-alkanes with a relative predominance of odd carbon numbered homologues. Contrastingly, an increase in short-chain even carbon numbered n-alkanes was found in charred biomass with progressing temperatures. We applied lipid analysis to buried ancient topsoils that contained charred organic matter and to corresponding control soils, which were characterized by a lighter color and lower contents of charred materials. Commonly, the proportion of lipid extracts was found to be lower in the ancient soil than in the control samples, which indicated an enhanced degradation of organic matter, e.g., by thermal degradation. All samples displayed a particular pattern of short-chain and even carbon numbered n-alkanes (maximum at n-C₁₆ or n-C₁₈). The ratios CPI (carbon preference index) and ACL (average chain length) for the investigated soil samples matched the ratios found for maize and rye straw charred at 400 °C or 500 °C, respectively. These molecular ratios indicate the presence of charred biomass. The predominance of short-chain and even carbon numbered n-alkanes was a result of thermal degradation of biomass. The degradation products were preserved in ancient soils and could be applied as molecular markers in archaeological or palaeoenvironmental research.     

关于生与死的探讨与沉思

生与死是一个古老而又沉重的话题。要正确深刻地探讨这个问题,可能条件还不很具备。本人只是想借重前贤的智慧与奇思妙想,沿着他们思维的足迹,作进一步的思考与探索,就灵魂有无的问题,有无因果报应的问题,气与灵的问题,乃至宇宙本体的问题等,表述一些个人的体会与想法。     

《孔圣宗师出身全传》考论

《孔圣宗师出身全传》是中国古代唯一以孔子为中心人物的章回体长篇小说,它比较严格地遵照史载．将一人言行编成若干故事,演为传记小说,此为首创,在中国古代小说史上亦属罕见。用通俗小说体例来展现圣人生平与思想,在孔子形象与儒学传播史上意义非凡。但《孔圣宗师出身全传》版本稀少,在相当长的时期内罕为人知,鲜有人论及。本文就该书的体例结构、题材本事与“全相”模式的来源,及其对孔子形象的传播影响略作考论,认为《孔圣宗师出身全传》“年谱式”体例借鉴了《阙里志．年谱》,题材主要出自《孔子家语》,“全相”模式深受《孔子圣迹图》的影响。《全传》使孔子形象与思想更利于被普通百姓理解、接受,具有独特的传播优势。     

Hydrothermal control on organic matter alteration and illite precipitation, Mt Isa Basin, Australia

Abundant illite precipitation in Proterozoic rocks from Northern Lawn Hill Platform, Mt Isa Basin, Australia, occurred in organic matter‐rich black shales rather than in sandstones, siltstones and organic matter‐poor shales. Sandstones and siltstones acted as impermeable rocks, as early diagenetic quartz and carbonate minerals reduced the porosity–permeability. Scanning and transmission electron microscopy (SEM and TEM) studies indicate a relation between creation of microporosity–permeability and organic matter alteration, suitable for subsequent mineral precipitation. K–Ar data indicate that organic matter alteration and the subsequent illite precipitation within the organic matter occurred during the regional hydrothermal event at 1172 ± 50 (2σ) Ma. Hot circulating fluids are considered to be responsible for organic matter alteration, migration and removal of volatile hydrocarbon, and consequently porosity–permeability creation. Those rocks lacking sufficient porosity–permeability, such as sandstones, siltstones and organic matter poor shales, may not have been affected by fluid movement. In hydrothermal systems, shales and mudstones may not be impermeable as usually assumed because of hydrocarbons being rapidly removed by fluid, even with relatively low total organic carbon.     

How matter comes to matter in children's nature play: posthumanist approaches and children's geographies

In the present paper, a posthumanist approach is used to analyse children's play activities in natural environments. The aim is to analyse intra-actions between children, the material environment and discourses, with a focus on the material and embodied aspects of these intra-actions. Forty-two children between six and eight years and from two Swedish schools participated in the study. Video observations of play activities have been the most important data source. For the analysis of how matter ‘acts’, play with sensorimotor content has been distinguished from play with symbolic content. In sensorimotor play, matter seems to ‘talk’ more directly to children's hands and bodies. In play activities with symbolic content, matter works both directly and through discourses, when objects are given symbolic meaning. In both kinds of play, discursive practices in the peer groups are influential.     

Cerebral White Matter — Historical Evolution of Facts and Notions Concerning the Organization of the Fiber Pathways of the Brain

Gross and microscopic studies by early investigators led the cerebral white matter from being regarded as an amorphous mass to an intricately organized system of fasciculi that facilitate the highest expression of cerebral activity. Here we pay homage to the anatomists whose observations resulted in the evolution of ideas about the cerebral white matter. We also draw attention to limitations of the earlier methodologies and to some of the conflicts and controversies that have characterized this field and that persist in the current literature. We conclude with brief reference to the principles of organization of the fiber pathways derived from our studies in the monkey using the autoradiographic tract tracing technique, another step in the ongoing investigations of the cerebral white matter. This historical review has contemporary relevance because the fiber pathways of the brain are crucial components of the distributed neural circuits that subserve nervous system function; the clinical manifestations of white matter damage are recognized with greater frequency and clarity; and magnetic resonance imaging tractography has made it possible to view these fiber bundles within the living human brain.     

Ancient soil resources of the Usumacinta River Region,Guatemala

In this study we present the results of a combination of methods used to identify possible agricultural activity of the ancient Maya in the Usumacinta River Basin in Guatemala. These methods included stable carbon isotope analysis of bulk soil organic matter, soil profile investigations and a spatial model of gentle slopes and well-drained soils to identify favorable agricultural conditions. Stable carbon isotope analysis of bulk soil organic matter in particular offers potentially direct evidence of agricultural activity. The δ¹³C results suggest that there is a strong signature of C₄ plants, such as maize and tropical grasses, throughout the study area. Further, the current soil conditions and extent of relatively gently sloped areas are favorable to agriculture. Overall, the results are supportive of the hypothesis that the area, located between the polities of Piedras Negras and Yaxchilán, was agriculturally important to surrounding areas.     

Liquid passions: bodies,publics and city waters

This article explores water’s capacities as a vibrant matter with specific properties that generates passions, attachments and a sense of belonging, and which enrols bodies in new connections, socialities, alliances and politics in unpredictable ways. Based on research into practices and engagements with water in a large urban public space the paper builds on studies of blue space. It concludes that water has the capacity to enhance a sense of well-being in those that swim in it and to mobilise a very particular sense of embodiment which gives this form of public space its distinctiveness constituting new forms of sociality and connections amongst diverse individuals. It seeks to do this by paying attention to the experiences of things themselves and the active participation of nonhuman forces in events and the ‘vital materiality’ that runs through and across bodies both human and non-human. The article also explores water’s capacity to be constituted and defined by experts as dangerous and risky matter, and to thus engender political associations and connections amongst diverse groups who seek to oppose such expert interventions.     

刘知几“疑古惑经”思想探析

刘知几"疑古惑经"思想集中体现在对儒家经典《尚书》、《论语》、《春秋》等提出的怀疑与批驳中。他在强调直书实录、史学求真的同时,也注重儒家的纲常名教。"疑古惑经"思想对后世经史之学,尤其是唐代儒学、宋代辨伪学、清代乾嘉考据学和民国疑古思潮等,都产生了深远的影响。