近代安徽茶业产销格局形成过程中的交通因素

近代安徽茶业在整体上呈现出不断发展的态势,并日渐形成皖南外销茶和皖西内销茶并驾齐驱的销售格局,两地茶区因销路问题而选择了不同的发展路径.在近代安徽茶业产销格局形塑和日益深化的过程中,交通起到了至为关键的推动作用.相对优越的地理区位和独特的交通条件赋予徽州茶远销海外的现实保证,闭塞的地理位置和道路交通则极大地限制了皖西茶出口的可能性.随着铁路、公路等现代交通体系的建立,火车、汽车、轮船等新型交通运输工具开始广泛地运用到茶叶贩运中,近代安徽茶叶的运输路线随之发生了重要变化.茶叶从枝头走向市场需辗转于多重运输环节,新式交通方式在缩短运输时间、降低运输成本方面具有明显优势,逐步打破了传统水路运输的主导地位.     

Spatial variations in the salinity of pore waters in northern deep water Gulf of Mexico sediments: implications for pathways and mechanisms of solute transport

Spatial variations in the salinity of pore waters in sedimentary basins can provide important insight into basin-scale hydrogeologic processes. Although there have been numerous studies of brine seeps in the deep water Gulf of Mexico, much less is known about porewater salinities in the vast areas between seeps. A study has been made of spatial variation in pore water salinities in sediments in an approximately 500 km by 200 km area of the northern deep water (water depth >500 m) Gulf of Mexico sedimentary basin (GOM) to provide insight into pathways and mechanisms of solute transport in this portion of the basin. A second objective was to document salinities in the upper 500 m of the sedimentary section, the approximate depth to which methane hydrates, a potential future energy resource, may be stable. Elevated salinities would reduce the P – T stability range of hydrates. Salinities were calculated from borehole logs using a dual electrical conductivity model. Even though much of the northern GOM is underlain by allochthonous salt most of the undisturbed shallow sedimentary section has not been permeated by hypersaline waters. These waters are limited to areas near brine seeps. Hypersaline waters having salinities in excess of 100 g l⁻¹ become more common at subseafloor depths of 2 km and greater. A field study at Green Canyon 65 and published numerical simulations of fluid flow above tabular salt bodies suggest that brines produced by salt dissolution migrate laterally and pond above salt and/or within minibasins and that the dominant mechanism of vertical solute transport is a combination of compaction-driven advection and diffusion, not large-scale thermohaline overturn. Superimposed on this diffuse upward flux of dissolved salt is the more focused and localized expulsion of saline fluids up faults.     

Infrastructure Nation: State Space,Hegemony, and Hydraulic Regionalism in Pakistan

Large‐scale infrastructures are often understood by state planners as fulfilling a national integrative function. This paper challenges the idea of infrastructures as national integrators by engaging theories of state/nation formation and infrastructure in a postcolonial context. Specifically, I put Lefebvre's characterization of the production of state space as a homogenization‐differentiation dialectic in conversation with Gramsci's understanding of hegemony, bureaucracy, and nationalism to analyze the controversy surrounding the giant Tarbela Dam in Pakistan in the 1960s. I use the Tarbela controversy as a case study to elaborate a theory of postcolonial nation‐formation through state‐led infrastructural projects. I argue that in a postcolonial context the failure to articulate a hegemonic nationalist ideology to accompany the production of large‐scale infrastructure results in a fragmentation of state space in some ways, even as state space is homogenized and integrated in other ways. The paper also offers a “hydraulic lens” on the politics of regionalism in Pakistan.     

Robustness of Social‐Ecological Systems: Implications for Public Policy

We conceptualize social‐ecological systems (SESs) as complex adaptive systems where public policy affects and is affected by the biophysical system in which it is embedded. The study of robustness of SESs combines insights from various disciplines including economics, political science, ecology, and engineering. In this paper we present an approach that can be used to explore the implications for public policy when viewed as a component of a complex adaptive system. Our approach leverages the Institutional Analysis and Development framework to provide a platform for interdisciplinary research that focuses on system‐wide outcomes of the policy process beyond just policy change. The main message is that building robustness can create new vulnerabilities. Fail‐free policies cannot be developed, and instead of a focus on the “right” policy, we need to think about policy processes that stimulate experimentation, adaptation, and learning.     

The National Sample from the 1851 Census of Great Britain an Interim Report on Methods and Progress

Abstract

In the last years, the use of geographical information systems has been common in many historical and geographical studies. Perhaps one of the least known applications is network analysis, a series of functions related to hydrology and mobility. Since 1994, researchers have used network analyses to understand costs and time expenditure in transportation in Roman times, with the aim of modeling commercial routes. Archaeological objects were employed to confirm those commercial distributions whose quantities were related basically to transport costs. The present articles go far beyond and attempt to understand decisions in building a transport network based on time series. It seems that not all Roman decisions in transport infrastructure were due to economic reasons; some parts of Roman roads were built basically for political reasons and affected later developments.     

Material Politics Facing Post-Truth: Speculation,Infrastructure, and Ecology in Turkey

Despite their imposing material presence, the values and harms stemming from the construction of infrastructural megaprojects remain speculative affairs in Istanbul, Turkey. This article distinguishes two modes of speculation pertaining to megaprojects that present different ethical and political possibilities, namely de-materialising and re-materialising speculation. Contributing to debates about material politics informed by Noortje Marres (Material Participation; Palgrave Macmillan, 2015) and William Connolly (The Fragility of Things; Duke University Press, 2013), our framework of de- and re-materialising speculation avoids isolating material and planetary agency to instead consider how their uncertainties and potentials play a role at the intersection with politico-economic life. Accordingly, we analyse the coalescence of ecological and democratic crises. In Turkey, populism’s anthropocentric construction of “the will of the people” exacerbates ecological collapse. But also, ecological collapse inspires a search for a politics and ethics that acknowledge human–nonhuman ecological entanglements. The contestation between de-and re-materialising speculation underscores possibilities and limitations of ecological politics in contexts of populism and post-truth.     

新时期大都市公共交通发展策略研究——香港公交发展启示

优先发展公共交通是破解我国城市交通困境的唯一方法,是建立"两型"社会的科学要求,是城市可持续发展的必由之路。从香港公共交通系统发展历程、规划设计和运营管理等视角,归纳总结了其成功经验和发展趋势,即从中心区走向市域、从道路走向轨道、从线网拓展走向服务提升、从行政干预走向法制保障、从环境污染走向环境友好。并针对我国城市公交发展现状,从社会人文、城市规划、科技体制等方面提出了:以人为本、公交城市、持续发展、系统协调、科技引领、体制建设的发展策略,以期为我国城市交通的新一轮跨越式发展提供参考依据。     

The Future of Collective Farms' Built Social Infrastructure: Choosing Between Central Place and Network Theories

The aim of this paper is to discuss local and regional planning and development practices in a post‐socialist country such as Estonia. Two approaches — central places and network theories — are used as a conceptual basis. According to the first hypothesis, planning and development of social infrastructure (e.g. schools, sports halls) has remained based on the central place theory — as an outdated planning approach — in Estonia. The second hypothesis argues that while, on the one hand, the application of the network paradigm and increased cooperation between local communities would considerably save public resources, on the other hand, because of the path dependency of Soviet centralized planning and development practices, the networking and lobbying takes place vertically rather than horizontally. This restricts both administrative cooperation and networking on the local and regional levels. The paper consists of three parts. The first part describes the turn in Western planning theory: the shift from normative top‐down planning to a bottom‐up approach and networking. The second part analyses critically the Soviet and post‐Soviet planning theory and practices: the planning and development culture created during the Soviet era. Finally we present a case study of a community planning procedure in the Suure‐Jaani locality — a good example of the influence of historical changes in the settlement system and planning culture of the past on current development.     

A vector of high‐temperature paleo‐fluid flow deduced from mass transfer across permeability barriers (quartz veins)

Quartz veins acted as impermeable barriers to regional fluid flow and not as fluid‐flow conduits in Mesoproterozoic rocks of the Mt Painter Block, South Australia. Systematically distributed asymmetric alteration selvedges consisting of a muscovite‐rich zone paired with a biotite‐rich zone are centered on quartz veins in quartz–muscovite–biotite schist. Geometric analysis of the orientation and facing of 126 veins at Nooldoonooldoona Waterhole reveals a single direction along which a maximum of all veins have a muscovite‐rich side, irrespective of their specific individual orientation. This direction represents a Mesoproterozoic fluid‐flow vector and the veins represent permeability barriers to the flow. The pale muscovite‐rich zones formed on the downstream side of the vein and the dark biotite‐rich zones mark the upstream side. The alteration couplets formed from mica schist at constant Zr, Ga, Sc, and involved increases in Si, Na, Al and decreases in K, Fe, Mg for pale alteration zones, and inverse alteration within dark zones. The asymmetry of the alteration couplets is best explained by the pressure dependence of mineral–fluid equilibria. These equilibria, in combination with a Darcian flow model for coupled advection and diffusion, and with permeability barriers imposed by the quartz veins, simulate the pattern of both fluid flow and differential, asymmetric metasomatism. The determined vector of fluid flow lies along the regional foliation and is consistent with the known distribution of regional alteration products. The presence of asymmetric alteration zones in rock containing abundant pre‐alteration veins suggests that vein‐rich material may have generally retarded regional fluid flow.