Recovering social and cultural dynamics from plaster floors: chemical analyses at ancient Chunchucmil,Yucatan, Mexico

Phosphate analysis and trace metals analysis were used to determine activities that took place on plaster floors in domestic contexts at the ancient Maya site of Chunchucmil, Yucatan. Research on activities and the use of space contributes to an understanding of social relations within household groups as well as unforeseen patterns that structure refuse discard. The floors analyzed in this paper pertain to three structures in two neighboring houselots dating to the Early Classic (300–600 A.D.) period. Data from the chemical analyses were utilized in conjunction with associated architectural features and artifacts found on the floors. These three lines of information were interpreted with the help of models developed from ethnographic and ethnoarchaeological research. The results demonstrated functional differentiation of rooms within elaborate residences and suggested that front rooms were used to host visitors. The results also suggested that different types of debris were managed differently. Finally, chemical analyses suggest that non-elite Maya occasionally enacted rituals often restricted to elites.     

Dangerous Places and Wild Spaces: Creating Meaning with Materials and Space at Contemporary Maya Shrines on El Duende Mountain

Ethnoarchaeological observations at Maya shrines on a sacred mountain suggest that three potent material strategies imbue ritual practices with different social meanings: 1) the use of different types of materials as offerings in various rites, 2) the ways in which the physical conditions of an offering are altered during deposition, and 3) the choice of location where the offering is deposited within the site relative to a ceremonial focal point. Through these strategies, individuals creatively negotiate limited access to material resources and assign diverse meanings to the material culture, practices, and places of ritual. Materials that represent commoners' rituals may primarily consist of quotidian items that are transformed in meaning by how and where they are deposited into an archaeological context.     

中国文化自然遗产管理评价的指标体系初探

化和自然遗产管理的研究引起学术界重视。目前献集中于研究转型期遗产管理的组织结构的调整,但缺少在管理机制的设计和操作层面上开展研究。本试图从遗产管理绩效评估入手开始对遗产管理激励机制的探索。初步构建了以遗产保护为基本目标和以社区发展、游客管理和经营开发为贡献目标的遗产管理评价指标体系,并对评价的原则和关键指标确定等进行思考。     

改革开放以来小康社会理论的形成与发展

小康社会理论是中国特色社会主义理论体系的主体组成部分之一,是马克思主义现代化理论与中国发展实际相结合的产物,丰富和发展了对中国特色社会主义现代化过程的理解。在1980年代由邓小平提出,经历了六个发展阶段,到中共十七大提出＂全面建设小康社会新要求＂之际,完全成熟。由＂大同论＂向＂小康论＂转型,有其深刻的现实、历史、理论与文化的根源。＂小康论＂立足于社会主义初级阶段的基本国情,以社会化大生产与工业市场文明为目标诉求,在强调公有制的主导作用下,显示出对个人利益的认可、宽容与疏导,强调＂法治＂、＂市场＂＂、共同富裕＂与＂民主＂。注重循序渐进而不急于求成。小康社会理论的形成与发展,是对中国特色社会主义现代化理论的创新。     

时间连接成分的历时演变和产生方式

时间连接成分反映了篇章中相关事件的时间先后关系,是篇章组织中时间顺序义的显性表达法。本文从历时的角度考察了时间连接成分产生和发展的轨迹,归纳出时间连接成分产生的六种方式,同时对时间连接成分的隐喻基础作了简单的探讨。     

"中国"与"天下"的重合——古代中国疆域形成的历史轨迹

“The Central Kingdom” is pregnant of political implications as well as of geographical and cultural significance. It was believed that whoever controlled Zhongguo (the Central Kingdom or China) would be the legitimate ruler over Tianxia (the realm under heaven or all under heaven). It was the contention for “the Central Kingdom” among the varieties of dynasties, notably those established by the Han-Chinese and the various ethnic groups in the northern borderland, that lead to the alternation of disintegration and unification of the territory. It was not until the Qing Dynasty that the unified “Central Kingdom” composed of a variety of ethnic groups turned into the ideal “realm under heaven” with “the Central Kingdom” at its core, which naturally put an end to the formation of territory in ancient China. Translated by Chen Dan from Zhongguo Bianjiang Shidi Yanjiu 中国边疆史地研究 (China’s Borderland History and Geography Studies), 2007, (3): 1–15     

Equations of state for basin geofluids: algorithm review and intercomparison for brines

Physical properties of formation waters in sedimentary basins can vary by more than 25% for density and by one order of magnitude for viscosity. Density differences may enhance or retard flow driven by other mechanisms and can initiate buoyancy‐driven flow. For a given driving force, the flow rate and injectivity depend on viscosity and permeability. Thus, variations in the density and viscosity of formation waters may have or had a significant effect on the flow pattern in a sedimentary basin, with consequences for various basin processes. Therefore, it is critical to correctly estimate water properties at formation conditions for proper representation and interpretation of present flow systems, and for numerical simulations of basin evolution, hydrocarbon migration, ore genesis, and fate of injected fluids in sedimentary basins. Algorithms published over the years to calculate water density and viscosity as a function of temperature, pressure and salinity are based on empirical fitting of laboratory‐measured properties of predominantly NaCl solutions, but also field brines. A review and comparison of various algorithms are presented here, both in terms of applicability range and estimates of density and viscosity. The paucity of measured formation‐water properties at in situ conditions hinders a definitive conclusion regarding the validity of any of these algorithms. However, the comparison indicates the versatility of the various algorithms in various ranges of conditions found in sedimentary basins. The applicability of these algorithms to the density of formation waters in the Alberta Basin is also examined using a high‐quality database of 4854 water analyses. Consideration is also given to the percentage of cations that are heavier than Na in the waters.     

Gas breakthrough experiments on fine-grained sedimentary rocks

The capillary sealing efficiency of fine‐grained sedimentary rocks has been investigated by gas breakthrough experiments on fully water saturated claystones and siltstones (Boom Clay from Belgium, Opalinus Clay from Switzerland and Tertiary mudstone from offshore Norway) of different lithological compositions. Sand contents of the samples were consistently below 12%, major clay minerals were illite and smectite. Porosities determined by mercury injection lay between 10 and 30% while specific surface areas determined by nitrogen adsorption (BET method) ranged from 20 to 48 m² g ^{? 1}. Total organic carbon contents were below 2%. Prior to the gas breakthrough experiments the absolute (single phase) permeability (k_abs) of the samples was determined by steady state flow tests with water or NaCl brine. The k_abs values ranged between 3 and 550 nDarcy (3 × 10^?21 and 5.5 × 10^?19 m²). The maximum effective permeability to the gas‐phase (k_eff) measured after gas breakthrough on initially water‐saturated samples extended from 0.01 nDarcy (1 × 10^?23 m²) up to 1100 nDarcy (1.1 × 10^?18 m²). The residual differential pressures after re‐imbibition of the water phase, referred to as the ‘minimum capillary displacement pressures’ (P_d), ranged from 0.06 to 6.7 MPa. During the re‐imbibition process the effective permeability to the gas phase decreases with decreasing differential pressure. The recorded permeability/pressure data were used to derive the pore size distribution (mostly between 8 and 60 nm) and the transport porosity of the conducting pore system (10^‐5–10^‐2%). Correlations could be established between (i) absolute permeability coefficients and the maximum effective permeability coefficients and (ii) effective or absolute permeability coefficients and capillary sealing efficiency. No correlation was found between the capillary displacement pressures determined from gas breakthrough experiments and those derived theoretically by mercury injection.     

盘龙城与《盘龙城》

本对《盘龙城》报告体例、遗迹、遗物以及附录分别作出了评述,除了肯定报告的优点之外,主要陈述了与报告编不同的看法,如：报告材料缺乏类型学分析,因此对于遗存时代的判断依据不足,有的甚至没有依据;报告对盘龙城作为一个整体聚落特点体现不够,对一些遗迹性质的判断容易引起争议;不少的数据、图像资料——有的是很重要的材料——存在问题。本对于研究引用盘龙城报告材料、判断盘龙城及其遗迹、遗物性质,应当有所帮助。     

A Snow-Push Mechanism for Ridge Formation in the Cairngorm Mountains,Scotland

Observations are presented of a newly deposited snow-push ridge superimposed on a Holocene moraine in Coire an Lochain in the Cairngorm Mountains. The ridge formed when a sliding snow slab was thrust up the proximal slope of the moraine, entraining till gravel and redepositing it on the moraine crest. The process was a late-stage event during the complex wastage of a large snowfield resting on a rock slab, involving basal sliding, avalanching and melting. Snow-push landforms appear to be rare in Scotland. Nevertheless, these observations suggest that fresh material may be added to relict moraine crests in the present-day climate, with implications for exposure-age dating of moraines. However, in this case the addition of debris by snow push to a late Holocene moraine crest does not affect the interpretation of moraine age.