"三个代表"重要思想的双重主题及其理论体系

对"建设什么样的党、怎样建设党"和"什么是社会主义、怎样建设社会主义"的回答,是"三个代表"重要思想的双重主题."三个代表"重要思想具有党的建设理论和中国特色社会主义建设理论两大体系.辩证认识"三个代表"重要思想的双重主题及其理论体系,有助于准确把握"三个代表"重要思想的历史地位.     

The Gibbs Farmstead: Household Archaeology in an Internal Periphery

The Gibbs farmstead, a rural domestic site in Knox County, East Tennessee, was inhabited by four generations of the Nicholas Gibbs family between ca. 1792 and 1913. In the following essay, world systems theory is combined with primary historical sources and the archaeological record to explore how aspects of the emerging global system influenced daily material life and household-level economic strategies among the Gibbs family in Southern Appalachia, regarded as an internal periphery within the world system. Focusing upon domestic architecture and foodways, consideration of material life reveals the presence of a strong vernacular orientation among the Gibbs family that was also substantially influenced by larger trends within national-level consumerism and popular culture.     

The Casas Grandes Regional System: A Late Prehistoric Polity of Northwestern Mexico

Casas Grandes, or Paquimé, is located in northwestern Chihuahua, Mexico, although it is one of the pueblo-style cultures that are best known from the adjacent southwestern U.S. At its apogee (ca. A.D. 1200–1450), Casas Grandes has been characterized as the largest and most complex prehistoric community in the puebloan world. It is further famous both as the center of one of the major interaction systems of the region, as well as a link between the cultures of Mesoamerica and those of the U.S. Southwest. Despite its acknowledged status as one of late prehistoric North America's few indigenous complex societies, the Casas Grandes polity has been so little studied that most aspects of its size, structure, level of centralization, and mode of operation remain obscure. The writers' work in Chihuahua has been designed to remedy this situation. In contrast to the original and highly influential interpretation that has prevailed for the last 25 years, the work reported here argues that the Casas Grandes polity, like its Chacoan and Hohokam counterparts of the adjacent southwestern U.S., existed at an intermediate level of sociopolitical complexity, so that it was not able to exert a uniform hegemony even over its near neighbors. Envisioned instead is a less comprehensive, less centralized situation of irregular control in a politically unstable context.     

Hydrothermal,multiphase convection of H2O‐NaCl fluids from ambient to magmatic temperatures: a new numerical scheme and benchmarks for code comparison

Thermohaline convection of subsurface fluids strongly influences heat and mass fluxes within the Earth's crust. The most effective hydrothermal systems develop in the vicinity of magmatic activity and can be important for geothermal energy production and ore formation. As most parts of these systems are inaccessible to direct observations, numerical simulations are necessary to understand and characterize fluid flow. Here, we present a new numerical scheme for thermohaline convection based on the control volume finite element method (CVFEM), allowing for unstructured meshes, the representation of sharp thermal and solute fronts in advection‐dominated systems and phase separation of variably miscible, compressible fluids. The model is an implementation of the Complex Systems Modelling Platform CSMP++ and includes an accurate thermodynamic representation of strongly nonlinear fluid properties of salt water for magmatic‐hydrothermal conditions (up to 1000°C, 500 MPa and 100 wt% NaCl). The method ensures that all fluid properties are taken as calculated on the respective node using a fully upstream‐weighted approach, which greatly increases the stability of the numerical scheme. We compare results from our model with two well‐established codes, HYDROTHERM and TOUGH2, by conducting benchmarks of different complexity and find good to excellent agreement in the temporal and spatial evolution of the hydrothermal systems. In a simulation with high‐temperature, high‐salinity conditions currently outside of the range of both HYDROTHERM and TOUGH2, we show the significance of the formation of a solid halite phase, which introduces heterogeneity. Results suggest that salt added by magmatic degassing is not easily vented or accommodated within the crust and can result in dynamic, complex hydrologies.     

Diffuse hydrothermal methane output and evidence of methanotrophic activity within the soils at Sousaki (Greece)

Methane soil flux measurements have been made in 38 sites at the geothermal system of Sousaki (Greece) with the closed chamber method. Fluxes range from ?47.6 to 29 150 mg m^?2 day^?1, and the diffuse CH₄ output of the system has been estimated at 19 t a^?1. Contemporaneous CO₂ flux measurements showed a moderate positive correlation between CO₂ and CH₄ fluxes. Comparison of the CO₂/CH₄ soil flux ratios with the CO₂/CH₄ ratio of the gases of the main gas manifestations provided evidence for methanotrophic activity within the soil. Laboratory CH₄ consumption experiments confirmed the presence of methanotrophic microorganisms in soil samples collected at Sousaki. Consumption was generally in the range from ?4.9 to ?38.9 pmolCH₄ h^?1 g^?1 but could sometimes reach extremely high values (?33 000 pmolCH₄ h^?1 g^?1). These results are consistent with recent studies on other geothermal systems that revealed the existence of thermoacidophilic bacteria exerting methanotrophic activity in hot, acid soils, thereby reducing methane emissions to the atmosphere.     

The haves and have nots in Australia's Tropical North – New Perspectives on a Persisting Problem

There is significant confluence in the literature that leads one to expect groups of haves and groups of have nots in socio‐economic systems within common spatial contexts. Several economic theories suggest economic activity to be concentrated in a few core areas with geographically large ‘peripheries’ relying on one or two industries for employment and income. In the context of the north of Australia, issues of disparities in socio‐economic status between the region and elsewhere in Australia, and also within the region have been highlighted in the literature for some time. This paper discusses the contemporary situation using customised data collected and analysed for 55 river‐basin catchments in the Tropical Rivers region of northern Australia to highlight the extent of the haves and have nots problem. A range of spatial economic theories are discussed as theoretical bases for the present day situation and as pointers to revisionist approaches which may address it. Transforming the have nots to improved states of well‐being will be a costly and difficult process. Consequently, we argue that factors other than raw incomes and economic production should be reconsidered and re‐prioritised by governments as redress to the ongoing ‘problem’ of the North.     

Forestry policy in colonial and postcolonial Zimbabwe: continuity and change

Using the case of Mafungautsi Forest Reserve, this paper discusses continuities and changes in policy and practice at the communal and reserved forest interface in Zimbabwe. Colonial forestry policy in Zimbabwe has often been labelled as oppressive, as communal area citizens were not allowed to participate effectively in its formulation and implementation. Independence in 1980, it was thought, would usher in an era of greater participation within the forestry sector. However, the hope that local communities would have greater input in the forestry policies and management has largely remained unfulfilled. The state institutions responsible for managing forests have largely remained unsympathetic to the involvement of local communities in the management of forestry resources despite the pre-independence rhetoric. Alongside the co-management attempt to make local peasants citizens through their inclusion in decision-making has been the continuity of the colonial policy that treated local peasants who used resources as criminals destroying trees and forests. This paper examines how the fundamental policy perspective of forestry in Zimbabwe still perceives local peasant farmers to be unsustainable exploiters of forests. The local resource users have not remained passive recipients of the repressive forestry policies and practices based on science but have actively contested them since the 1950s.     

何以西北?——国史上西北情结的渊源

情结是一种根深蒂固的心理依恋,是一种无以名状的思维偏向。"西北情结"是国史中一个发端悠久、影响深远的历史情结,即对西北广博历史背景和深厚文化积淀的情感纠葛、执著眷顾。秦汉以降,每逢国祚不宁或朝纲兴替,如宋室南迁之后、明清易代之际、近代内忧外患之时,国人常常抚今思远、吊古怀旧,追念立国西北而抚柔天下之盛景。这种不时被国人唤醒的西北情结,追根溯源,实乃萌动于远古历史传说,滥觞于商周青铜文化,生成于秦汉帝国构造时代。