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81.
John L. Creese 《Midcontinental journal of archaeology, MCJA》2014,39(1):1-29
This paper examines the spatial configuration of two early fourteenth-century Woodland villages—one composed of longhouses (Nodwell) and one a ring-shaped arrangement of oval huts (Fort Hill). The contrasting spatial layouts of these sites are explored from the perspective of social interaction stress in early villages. Visibility Graph Analysis, a technique for analyzing the relational order of visual fields, is used to measure the properties of spatial integration and control in these settlements over the course of their distinctive occupation histories. Results reveal “top-down” vs. “bottom-up” dispositions toward spatial order that influenced the routine use of settlement space, the nature of village growth, and arguably, long-term trajectories of community development in regional longhouse and ring-shaped traditions. 相似文献
82.
Thermal convection in faulted extensional sedimentary basins: theoretical results from finite-element modeling 总被引:1,自引:0,他引:1
Thermal convection has the potential to be a significant and widespread mechanism of fluid flow, mass transport, and heat transport in rift and other extensional basins. Based on numerical simulation results, large‐scale convection can occur on the scale of the basin thickness, depending on the Rayleigh number for the basin. Our analysis indicates that for syn‐rift and early post‐rift settings with a basin thickness of 5 km, thermal convection can occur for basal heat flows ranging from 80 to 150 mW m?2, when the vertical hydraulic conductivity is on the order of 1.5 m year?1 and lower. The convection cells have characteristic wavelengths and flow patterns depending on the thermal and hydraulic boundary conditions. Steeply dipping extensional faults can provide pathways for vertical fluid flow across large thicknesses of basin sediments and can modify the dynamics of thermal convection. The presence of faults perturbs the thermal convective flow pattern and can constrain the size and locations of convection cells. Depending on the spacing of the faults and the hydraulic properties of the faults and basin sediments, the convection cells can be spatially organized to align with adjacent faults. A fault‐bounded cell occurs when one convection cell is constrained to occupy a fault block so that the up‐flow zone converges into one fault zone and the down‐flow zone is centred on the adjacent fault. A fault‐bounded cell pair occurs when two convection cells occupy a fault block with the up‐flow zone located between the faults and the down‐flow zones centred on the adjacent faults or with the reverse pattern of flow. Fault‐bounded cells and cell pairs can be referred to collectively as fault‐bounded convective flow. The flow paths in fault‐bounded convective flow can be lengthened significantly with respect to those of convection cells unperturbed by the presence of faults. The cell pattern and sense of circulation depend on the fault spacing, sediment and fault permeabilities, lithologic heterogeneity, and the basal heat flow. The presence of fault zones also extends the range of conditions for which thermal convection can occur to basin settings with Rayleigh numbers below the critical value for large‐scale convection to occur in a basin without faults. The widespread potential for the occurrence of thermal convection suggests that it may play a role in controlling geological processes in rift basins including the acquisition and deposition of metals by basin fluids, the distribution of diagenetic processes, the temperature field and heat flow, petroleum generation and migration, and the geochemical evolution of basin fluids. Fault‐bounded cells and cell pairs can focus mass and heat transport from longer flow paths into fault zones, and their discharge zones are a particularly favourable setting for the formation of sediment‐hosted ore deposits near the sea floor. 相似文献
83.
84.
Complexity science and human geography 总被引:2,自引:0,他引:2
David O'Sullivan 《Transactions (Institute of British Geographers : 1965)》2004,29(3):282-295
Complexity science has attracted considerable attention in a number of disciplines. However, this perspective on scientific understanding remains ill defined. In this paper, ideas and approaches from complexity science are reviewed. It appears that complexity science fundamentally is driven by ontological decisions on the part of the investigator. This is a result of the epistemological approach fundamental to complexity as it is currently studied, which is based on the construction of computer simulation models of reality. This methodology requires that researchers decide what exists and is important enough to represent in a simulation, and also what to leave out. Although this points to serious difficulties with complexity science, it is argued that the approach nevertheless has much to offer human geography. Drawing on complexity science, renewed engagements between physical and human geography, and between both and geographical information science seem possible, based on clearly shared concerns with the representation of geographical phenomena. In conclusion, it is suggested that seeing models as a source of geographical narratives may be a useful way to promote constructive engagement between different perspectives in the discipline. 相似文献
85.
The Whereabouts of Power: Politics, Government and Space 总被引:4,自引:0,他引:4
John Allen 《Geografiska annaler. Series B, Human geography》2004,86(1):19-32
Abstract In a world where it has become almost commonplace to talk about power as centralised or distributed, concentrated or diffuse, deterritorialized or dispersed even, it is all too easy to miss the diverse geographies of power that put us in place. The binary talk that forces us to choose between a centred or a decentred view of power, or to shuffle between them in an effort to blur clearly demarcated scales, leaves little room to move beyond defined distances and settled proximities in relation to the exercise of power. In this paper, a more spatially‐curious dialogue of power is opened up which foregrounds associational as well as instrumental forms of power which can make a difference to how we act politically. 相似文献
86.
鞠海龙 《中国历史地理论丛》2008,23(3)
本土安全是近代中国海疆安全战略的终极目标。由于战略目标的局限,中国虽然拥有具备远洋作战能力的海军,但却无法在海军军备建设、军力部署,以及战略战备等方面摆脱海岸防御战略的影响。受本土安全思想的影响,中国的战略决策者在甲午战争中屡失战机,而近代中国海疆安全战略体系也因此崩溃。 相似文献
87.
This paper is a brief investigation of one of the outstanding problems in Chalcolithic archaeology in the Negev desert of Israel: that of the spatial distribution of sites and the possible relationships between these sites that may be inferred. Although the region is rich in archaeological data for the Chalcolithic period, very little work has thus far been undertaken in terms of the quantification of the archaeological data – a necessary prerequisite for complex spatial analysis. Nevertheless, simple analysis of settlement patterns using the data presently available for 403 Chalcolithic sites in the Negev is given as an example. Autocorrelation tests measuring clustering and dispersion of sites show that the overall impression of clustering is a factor of access to farming land, water, grazing and Mediterranean maquis, but that smaller scale analysis suggests that settlement patterns were essentially random. This makes it difficult to argue in favour of settlement hierarchies or structured settlement of any kind. 相似文献
88.
心智模决定人们的思维方式和行为习惯。章认为接近与嫡系不良心智模式是旅行社增强竞争力的主要障碍。旅行社应积极倡导学习与效益型的心智模式。 相似文献
89.
Gordon L Clark Daniel Mansfield & Adam Tickell 《Transactions (Institute of British Geographers : 1965)》2002,27(1):91-110
Where there was a settled political geography of state power and responsibilities, the remarkable growth of global finance has put enormous pressure on national economic, political and social institutions. Furthermore, the looming crisis facing many continental European social security systems has raised many doubts about the long-term viability of the German model compared to its Anglo-American rivals. In this context, large German corporations have sought ways of sustaining their global competitiveness by, in part, restructuring their national and regional commitments. To illustrate, in this paper we concentrate on the nature and organization of German employer-sponsored pension institutions in relation to Anglo-American management practice. Two issues drive the analysis. One has to do with an emerging coalition between corporate management and shareholders with respect to the market value of the firm. The second issue has to do with the allocation of risk and uncertainty between the social partners when negotiating the financing and final value of promised retirement income. The institutional framework of collective decision-making common to many of Germany's largest firms is under pressure; three models of investment decision making relevant to pension assets and liabilities are used to illustrate this point. In doing so, we suggest that the German model is more fragile than commonly realized. We also suggest that Anglo-American management practices have penetrated and affected German corporate (national and regional) institutions and regulations. The social market lauded by advocates of stakeholder capitalism is changing rapidly, at least in the sphere of large firms and global finance. 相似文献
90.
《Transactions (Institute of British Geographers : 1965)》2002,27(1):111-127
Books reviewed:
Cyberspace: The World in WiresRob Kitchin
Mike Crang, Phil Crang and Jon May, (eds.) Virtual Geographies: Bodies, Space and Relations
Joanne P. Sharp, Paul Routledge, Chris Philo and Ronan Paddison, (eds.) Entanglements of Power: Geographies of domination/resistance
Steven Daniels, Humphrey Repton: Landscape Gardening and the Geography of Georgian England
David Harvey, Spaces of Hope
Robert J. Mayhew, Enlightenment geography: the political languages of British geography 1650-1850
Felix Driver, Geography Militant: Cultures of Exploration and Empire
Eric Sheppard and Trevor Barnes, (eds.) A Companion to Economic Geography
Gordon L. Clark, Maryann P. Feldman and Meric S. Gertler, (eds.) The Oxford Handbook of Economic Geography 相似文献
Cyberspace: The World in WiresRob Kitchin
Mike Crang, Phil Crang and Jon May, (eds.) Virtual Geographies: Bodies, Space and Relations
Joanne P. Sharp, Paul Routledge, Chris Philo and Ronan Paddison, (eds.) Entanglements of Power: Geographies of domination/resistance
Steven Daniels, Humphrey Repton: Landscape Gardening and the Geography of Georgian England
David Harvey, Spaces of Hope
Robert J. Mayhew, Enlightenment geography: the political languages of British geography 1650-1850
Felix Driver, Geography Militant: Cultures of Exploration and Empire
Eric Sheppard and Trevor Barnes, (eds.) A Companion to Economic Geography
Gordon L. Clark, Maryann P. Feldman and Meric S. Gertler, (eds.) The Oxford Handbook of Economic Geography 相似文献