The divergent city: unequal and uneven development in St. Louis

In St. Louis, as in many other cities, decline and displacement occurred when key policies, prejudices, and plans interacted with broad economic restructuring to devastate poor and minority communities, while leaving White and middle-class communities largely intact. Amidst overall population loss and neighborhood decline are pockets of prosperity and gentrification within the central city. In this article, we analyze three significant planning interventions in St. Louis, Missouri, that spurred displacement of populations—urban renewal, triage, and the foreclosure crisis. We argue that the differential experiences of Black and White during each of these periods represent two faces of development: one in the north of the city that is largely Black, experiencing vacant land, high crime, and crumbling infrastructure; another in the south of the city that is largely White, enjoying pockets of vibrant commercial development, larger homes, and stable real estate markets. We analyze each period through a framework of uneven and unequal development and displacement, which we call the Divergent City Theory. Based on this theory, planners face an ethical obligation to plan for the future of their cities in a way that seeks to reconcile the structured race and class inequalities of the divergent city.     

Geographic Influences in the Development of St. Louis

Abstract

Ralph and Mollie Izzard. A Walk in the Mountains, A Family's Trip Through the High Lebanon.

Wesley Calef. Private Grazing and Public Lands, Studies of the Local Management of the Taylor Grazing Act.

S. H. Steinberg (editor). The Statesman's Yearbook, 1960-1961.

E. Joseph Dreany. Alaska.

John C. and Elsie F. Caldwell. Our Neighbors in Japan.

R. J. Harrison Church. West Africa: A Study of the Environment and of Man's Use of it.

Alex Somme, editor. A Geography of Norden.     

农业文化遗产地文化关键种的概念、内涵和意义

包括联合国粮农组织(FAO)认定的全球重要农业文化遗产(GIAHS)和一些国家农业部认定的国家重要农业文化遗产(NIAHS)在内的农业文化遗产是一种新的遗产类型,通常具有丰富的生物多样性、多元的传统知识、独特的资源利用技术、杰出的文化景观,是一个典型的社会-生态系统。文化关键种作为塑造了一个地区的社会文化特征的重要物种,可以作为研究社会-生态系统保护与恢复力提升的一种独特视角和方法。本文通过系统梳理文化关键种概念的起源与内涵,分析了它们与生物文化多样性和社会-生态系统保护之间的关系,并结合农业文化遗产的基本特征和保护需求,尝试对农业文化遗产地文化关键种给出了定义,即"在农业文化遗产系统内,由生物资源和文化实践紧密结合,对当地社会文化的稳定性产生重要影响且能够促进农业文化遗产保护目标实现的生物文化复合体"。在此基础上,进一步分析了识别农业文化遗产文化关键种对农业文化遗产保护的主要意义:一是通过文化关键种的识别与保护有助于遗产地关键要素的识别和保护;二是利用文化关键种社区认同度高的优势可以调动社区参与遗产保护的积极性;三是以文化关键种的识别与保护为切入点,有助于更好地实现全球或国家重要农业文化遗产保护目标,即保障食物与生计安全、保护生物多样性、促进传统知识与技术体系传承以及维持景观特征等。     

Metamorphism of the Mullerneset Formation, St. Jonsfjorden, Svalbard

The metamorphism of upper greenschist facies metasediments exposed in the extreme southwestern portion of St. Jonsjorden, Svalbard, is described. The rocks form part of the Mullerneset Formation of the late Precambrian age Kongsvegen Group and constitute a portion of the central-western Spitsbergen Cale-donides. Four deformations (D, -D4) and two metamorphic episodes (Mi and M2) have affected the rocks of the Mullerneset area. Mi was a prograde event which was initiated prior to the onset of the Di and continued through this deformation. Pre-Dt metamorphism reached biotite grade whereas garnet grade was attained syn-Di. M2 was a lower-middle greenschist facies metamorphism associated with D2. The results of quantitative geothermometry in the pelitic rocks show that peak Mi metamorphic temperatures decrease southwards across the field area from about 540°C to 510°C. Geobarometry and estimates of depth of burial indicate that Mi pressures were in the range of 5–7 kb. The data are consistent with geothermal gradients in the range of 21 ± 4°C/km to 24 ± 5°C/km. M2 metamorphic conditions are not precisely determinable but temperatures and pressures were probably less than those attained during Mi. It is suggested that the rocks of central-western Spitsbergen were originally deposited in an aulacogen before the initiation of Caledonian diastrophism.     

Transformations of the Spatial Hegemony of the Courtyard in Post-Soviet St. Petersburg

Abstract

The courtyard is a space that existed before, during, and now after the Soviet period in Russian urban history. Noting the change in the courtyard's formerly hegemonic position on daily trajectories illustrates both Harvey's and Lefebvre's suggestions for uncovering the way that spaces articulate social values. A particularly revealing case study occurs in the struggle over including courtyards in a Chinese developer's project for a new multi-use district outside St. Petersburg. A brief history of the courtyard in Soviet planning allows subsequent analysis of the ways in which the city administration, the Chinese design team, and Russian planners deployed the courtyard as a spatial code for social meaning in design discussions. Examining the change in function and conceptualization of the courtyard shows how different groups in post-Soviet Russia seek to retain or redeploy concepts of the “collective” as they attempt to remake St. Petersburg as a successful “world” city.     

Redevelopment and Conservation in the Built Fabric of Post-Socialist St. Petersburg

This field-based case study examines recent changes in the built fabric of St. Petersburg, its urban planning system, and conservation management. The integral and highly regulated historical center, an important component of St. Petersburg's cultural landscape, has become a ground for (re)development and hence controversy. This study argues that mainly post-socialist forces (specifically, a persistent influence of the Soviet planning tradition combined with current entrepreneurial practices) have led to the current transformation of the built fabric of St. Petersburg. An examination of the processes underlying this transformation reveals that St. Petersburg is experiencing a sharpening dilemma between (re)development and conservation.     

Seismicity and seismic gap in the Lesser Antilles arc and earthquake hazard in Guadeloupe

Summary. A seismic study of the Lesser Antilles arc has been carried out, first for the period 1950–1978, for which we can use local seismic networks to draw maps of instrumental seismicity, then for the period 1530–1950, for which we have catalogues of felt earthquakes. The striking feature of the spatial distribution of foci is the cluster of epicentres in the northern half of the arc; all large earthquakes ( M > 7.5) are located north of 14° latitude. Seismicity cross-sections through the arc show a variable dipping subduction zone along the arc; the deep seismic zone is steeper in the centre of the arc than on the extremity.
The time-space diagram for historical seismicity, and the evidence of a seismic gap at the east of Guadeloupe lead us to consider the northern half arc as a likely site for a large earthquake in the near future.
The seismic slip rate calculated from all major earthquakes since 1530 is of much greater value than that obtained from recent plate tectonic models, suggesting that the recurrence rate of earthquakes is more than many hundreds of years with a possible aseismic creep.