昆明市保障性住区居民就业空间特征及其收入效应分析

保障性住房建设解决了大量城市低收入家庭的住房问题,但大多区位偏远、交通不便,远离城市就业中心,导致低收入人群的通勤成本上升,进而对其就业和收入产生影响。本研究以昆明市为样本城市,选取廉租房、公租房和经适房3类保障性住区,利用通勤距离、通勤时间、通勤方式、工作地点等指标,从居住-就业空间匹配角度,揭示保障性住区居民就业空间特征;并通过建立包含空间虚拟变量的多元回归方程,揭示了保障性住区居民就业空间特征对其收入的影响。     

Meteorological influences on the spatial and temporal variability of NO2 in Toronto and Hamilton

The spatial and temporal variability of nitrogen dioxide (NO₂) concentrations and their relationships with meteorology was evaluated in the Toronto–Hamilton urban airshed. NO₂ concentrations were highest in the early morning and late evening. Mean concentrations were highest in winter, although individual one-hour NO₂ concentrations were found to be highest in summer. Wind direction was the strongest control on hourly NO₂ concentration, and temperature and wind speed also had an effect. Our analysis of NO₂ concentration variation by wind direction showed that areas downwind of major highways, urban centres and industry were exposed to higher pollutant concentrations. Seasonal patterns of NO₂ concentration displayed significant spatial heterogeneity, in particular, in Toronto. Onshore winds sheltered coastal inhabitants from the full extent of NO₂ exposure they would otherwise experience. Seasonal variations in meteorology and emissions mean that the degree of spatial variability in NO₂ concentrations changes from season to season. This study will help to improve existing land-use regression-based NO₂ prediction models by incorporating meteorological controls on NO₂ distributions for health effect studies.     

How environments speak: everyday mobilities,impersonal speech and the geographies of commentary

This paper examines commentary as a mode of speaking that has not received sufficient attention by social and cultural geographers. In contrast to a representational understanding of commentary, where commentary is the expert interpretation of an environment, this paper develops a more passive understanding of commentary where the commentator is a figure through which the affective, material forces that constitute environments become expressed. Based on qualitative fieldwork in Sydney, Australia, the paper examines three modes of everyday commentary related to commuting. The commentaries of reportage, anecdote and autoventriloquy each demonstrate in different ways how the affective, material environments of commuting become spoken. The paper shows, first, how commentary is a constitutive rather than derivative aspect of the experience of commuting. Second, it shows that commentary is an expression of affective, material environments, rather than either the willed self-expression of the speaker, or the manifestation of socially and historically contingent discourses. Third, it shows that commentary can both close down and draw out specific affective, material environments. Fourth, it shows how commentary modulates the powers of existence in the zone of the commute, transforming the affective possibilities immanent to different situations.     

David J. Starkey,Chris Reid and Neil Ashcroft: England's Sea Fisheries. The Commercial Sea Fisheries of England and Wales since 1300. Chatham Publishing,London 2000, 272 pages

Abstract

This article explores the management practice of protection notices, fredlysning, in the traditional practice of eider down harvesting in Northern Norway. Previously, private initiatives were legitimate for protecting land and resources from public utilization, while today only the state authorities have this privilege. By juxtaposing empirical material from current eider down harvesting activities with childhood memories of growing up in this area during the 1960s, and available legal documents, the author finds that some quite radical changes have tacitly taken place, indicating rather tense dilemmas concerning local perceptions of land use issues. Analytically, Olwig's distinction between customary and natural law is used as a tool for addressing the political dimensions of the landscape concept historically. In this perspective, fredlysning fluctuates in and out of codified law through the centuries, and under growing impact of natural law rationale. Land issues, both concerning property rights and public access and use of the common resources of the outlying fields, utmarksressurser, are here understood as very powerful means to bind the people to the land, as a way of transforming the legitimate scale of polity, of building bonds to the nation.     

Europe in the nineteenth-century American mind: The literary perspectives

This article evaluates Karl Popper's contribution to analytic philosophy, and outlines some of the contradictions in his work which make it difficult to locate in any particular tradition. In particular, the article investigates Popper's own claims to be a member of the rationalist tradition. Although Popper described himself as a member of this tradition, his definition of it diverged quite radically from that offered by other supporters of rationalism, like, for example, Mach, Carnap, and the logical positivists of the Vienna Circle. The reason for this was that Popper believed the rationalist tradition, if it were to remain coherent and relevant, needed to overcome the dilemma posed by Hume's problem of induction. Popper believed that this problem rendered conventional understandings of rationalism, science, and inductive reasoning incoherent. This article suggests that Popper's principal contribution to modern philosophy was to reconfigure the rationalist tradition in such a way as to circumvent the problem of induction while preserving the rationalist commitment to reason, rational debate, and objective knowledge. Popper's reconfiguration of the epistemological bases of the rationalist tradition challenged dominant understandings of rationalist and analytic philosophy, and may be appropriately understood as part of a wider move among philosophers like Quine and Putnam to challenge conventional understandings of analytic philosophy, and of what philosophy itself could and could not achieve. It also informed a vision of social and political life (and of the social and political sciences) as rooted in principles of freedom, equality, and rational debate, but which cannot be fit within the traditional ideological landscape.     

Geochemical provenience of 16th–19th century C.E. Asian ceramics from Torres Strait,northeast Australia

Existing insights into the history of southeast Asian contacts with northern Australia prior to British colonization in 1788 are limited to Macassan visitors and the trepang industry beginning in the early 18th century and perhaps 16th century. Neither historical nor archaeological evidence indicate extension of such contacts to Torres Strait of northeast Australia. To shed further light on this issue, a collection of 16 Asian ceramic sherds surface collected and excavated recently from the islands of Pulu and Mabuyag in Torres Strait were compared to a large database of Southeast and East Asian stoneware jars that are well characterised, elementally, typologically and chronologically. This comparison matched a number of sherds with two jar types with likely production origins in Thailand and southern China. While the surface collected sherds from Pulu sourced to Thailand date probably to the 19th century, the small glazed sherd from Mabuyag island is typical of a southern Chinese decorated jar type dating to c. 1500–1600 C.E. This Chinese sherd is the earliest known Asian artefact in Australia and parallels recent archaeological evidence on the antiquity of contacts between Macassan trepangers and Aboriginal Australians. It is unknown if the Chinese sherd came ashore to Mabuyag through direct contact with Asian traders or from a nearby shipwreck through salvage.     

博物馆工作由封闭型向开放型的转变

博物馆工作必须由封闭型向开放型转变,这是由博物馆的基本职能决定的,也是客观形势发展的需要。我国博物馆工作目前还处在由封闭型或半封闭型向开放型的转变阶段。博物馆工作者要进一步更新观念,加速这一转变过程。     

Invasion of a karst aquifer by hydrothermal fluids: evidence from stable isotopic compositions of cave mineralization

Mineral deposits in the Cupp‐Coutunn/Promeszutochnaya cave system (Turkmenia, central Asia) record a phase of hydrothermal activity within a pre‐existing karstic groundwater conduit system. Hydrothermal fluids entered the caves through fault zones and deposited sulphate, sulphide and carbonate minerals under phreatic conditions. Locally, intense alteration of limestone wall rocks also occurred at this stage. Elsewhere in the region, similar faults contain economic quantities of galena and elemental sulphur mineralization. Comparisons between the Pb and S isotope compositions of minerals found in cave and ore deposits confirm the link between economic mineralization and hydrothermal activity at Cupp‐Coutunn. The predominance of sulphate mineralization in Cupp‐Coutunn implies that the fluids were more oxidized in the higher permeability zone associated with the karst aquifer. A slight increase in the δ³⁴S of sulphate minerals and a corresponding δ³⁴S decrease in sulphides suggest that partial isotopic equilibration occurred during oxidation. Carbonate minerals indicate that the hydrothermal fluid was enriched in ¹⁸O (δ¹⁸O_SMOW ～ + 10‰) relative to meteoric groundwater and seawater. Estimated values for δ¹³C_DIC (δ¹³C_PDB ～ ? 13‰) are consistent with compositions expected for dissolved inorganic carbon (DIC) derived from the products of thermal decomposition of organic matter and dissolution of marine carbonate. Values derived for δ¹³C_DIC and δ¹⁸O_water indicate that the hydrothermal fluid was of basinal brine origin, generated by extensive water–rock interaction. Following the hydrothermal phase, speleothemic minerals were precipitated under vadose conditions. Speleothemic sulphates show a bimodal sulphur isotope distribution. One group has compositions similar to the hydrothermal sulphates, whilst the second group is characterized by higher δ³⁴S values. This latter group may either record the effects of microbial sulphate reduction, or reflect the introduction of sulphate‐rich groundwater generated by the dissolution of overlying evaporites. Oxygen isotope compositions show that calcite speleothems were precipitated from nonthermal groundwater of meteoric origin. Carbonate speleothems are relatively enriched in ¹³C compared to most cave deposits, but can be explained by normal speleothem‐forming processes under thin, arid‐zone soils dominated by C4 vegetation. However, the presence of sulphate speleothems, with isotopic compositions indicative of the oxidation of hydrothermal sulphide, implies that CO₂ derived by reaction of limestone with sulphuric acid (‘condensation corrosion’) contributed to the formation of ¹³C‐enriched speleothem deposits.     

中国城市密集区航空运输联系研究

城市密集区间的航空运输联系导致城市间的内聚效应和空间互动。城市密集区间的航空运输联系具有明显方向性。京津唐、长江三角洲和珠江三角洲城市密集区间航空运输联系密切,国家级大都市与国家级大都市(区域性大都市)间联系具有普遍性,而与地方性城市中心间航空运输联系具有特殊性。长江三角洲、珠江三角洲和京津唐城市密集区等为人流与信息流联系密切的、以辐射为主的航空中心;辽宁中南部城市密集区为航空运输联系欠密切的、人流辐射与信息流集聚中心;四川盆地城市密集区为航空运输联系欠密切的、人流集聚与信息流辐射中心。     

西部大城市居民通勤特征及其与城市空间结构的关系研究——以成都市为例

以成都市为实证研究对象,在大规模问卷调查的基础上,对西部大城市居民通勤基本特征进行了研究。分析发现,西部大城市居民通勤方式以公共交通为主,选择私家车作为通勤工具的比例较高;大部分居民的通勤时间在30分钟以内,通勤距离小于5km。和北京、广州等东部大城市相比,西部大城市职住分离现象还不是非常严重;不同属性居民的通勤时间存在差异,西方空间错位假说反映的城市社会空间不平等现象在中国西部大城市同样存在并逐步显化;通勤空间组织特征与城市结构以及城市功能分区存在密切的关系;西部大城市的快速发展对居民日常通勤影响较大。