Defining dreams: young mothers’ agency in constructions of space

Understanding young mothers’ emic, or insiders’, spatial experiences is critical to realizing how their agency manifests in constructing and producing spaces, as opposed to common images of them as passive, vulnerable women living in deprived neighbourhoods. Set in the shrinking region of Parkstad Limburg in the Netherlands, this article draws on in-depth interviews and long-term participant observation in order to explore which modalities of agency emerge from young mothers’ spatial engagements with their neighbourhoods and homes. This article contributes to greater diversity and more agentic representations of young mothers than commonly perceived, and to a nuanced understanding of agency. The findings reveal that these women are continually navigating the social, physical and economic–political dimensions of space, from which four modalities of agency emerge: (1) ‘adhering to norms’, (2) ‘defining dreams’, (3) ‘challenging rules’ and (4) ‘considering options’. Contrary to understandings within a dominant independence-oriented discourse of agency as taking subversive action, this article shows that agency occurs in tacit, routine spatial practices, whilst navigating through individual circumstances and sociospatial structures and norms.     

发达国家城市收缩现象及其对中国的启示

城市收缩是发达国家在工业化与城市化过程中普遍存在的现象,城市收缩对发达国家经济社会转型、城市空间结构转变产生了深刻影响,在对城市收缩有效治理过程中形成的精明收缩与弹性城市理论对快速发展的工业化国家具有积极的借鉴意义。本文对发达国家城市收缩的现象与事实进行了系统梳理与分析,分析了城市收缩的特征与空间模式,探讨了城市收缩的形成机制和城市收缩的应对措施,并对西方发达国家城市收缩现象对我国的启示形成了几点认识。     

Urban shrinkage: an unspoken challenge of spatial planning in Russian small and medium-sized cities

Shrinkage since the collapse of state socialism has been evident in many Russian cities, especially in small and medium-sized (SMS) ones. The Russian state, de jure, has been promoting the idea of self-governance; thereby, urban municipalities ought to develop and adopt own planning decisions to cope with various challenges, including those related to depopulation. The current research focuses on planning responses to urban shrinkage. It aims at understanding how the phenomenon is conceptualized in the planning documents of Russian SMS cities and what solutions are proposed to cope with it in the conditions inherited from the Soviet times housing and infrastructural deficit. The empirical evidence for the analysis is drawn from over 70 SMS cities located in Central and Southern Russia. Results state that despite obvious and persisting urban shrinkage, most of the reviewed documents ignore or underestimate the phenomenon. Instead of suggesting flexible solutions, which would help overcome the shortage of urban infrastructure not aggravating shrinkages’ effects in the cityscape, long-term spatial plans are being developed with hope for future growth proposing measures that contribute to the intensification of urban sprawl and fragmentation.     

我国城市收缩测度与影响因素分析——基于人口与经济变化的视角

当前,世界上一些城市的收缩现象逐渐得到关注,但是我国城市是否呈现收缩现象,以及城市收缩的空间特征和主导因素等仍缺乏系统的分析。基于此,基于地级市尺度的人口、劳动力、经济、空间扩张和财政状况等数据,建立综合评价体系测度城市收缩现象,并建立回归模型理解城市收缩的影响因素。研究发现,我国一些城市开始呈现收缩,而东北、中部等城市比较明显。在影响因素上,劳动力、经济增长和就业规模有助于促进城市增长,而空间扩张、失业和财政收支状况等会加剧城市收缩。应谨慎判别不同城市收缩的特征和影响因素,强化复兴导向的城市化策略。     

Perspectives of civil society on governance of urban shrinkage: the cases of Heerlen (Netherlands) and Blaenau Gwent (Wales) compared

In light of the ongoing urban shrinkage debate, planners stressed the need for new planning concepts and strategies. In this respect, the relevance of involving civil society in governance of urban shrinkage has been emphasized. So far, however these issues have received limited attention. This paper aims to contribute to the debate by investigating (1) how actors in civil society experience urban shrinkage and (2) their perspectives on the governance of urban shrinkage. We study this in two shrinking medium-sized cities: Heerlen (the Netherlands) and Blaenau Gwent (Wales). To answer these research questions, we make use of the concept of social capital. We follow a comparative case study design, primarily basing the analysis on data from 52 in-depth interviews. In the case studies, specific patterns of social capital can be observed: strong place attachment, strong informal participation and weak trust of civil society in local governments. However, the experience of urban shrinkage and the reaction to shrinkage differs. We conclude that understanding shrinkage and addressing it are predominately context related. Explanations based on historical developments and welfare state provisions are offered. The paper ends with reflections on the implications of these findings for governance of urban shrinkage.     

泗水国出土泡桐材性研究

木质文物出土后环境发生了很大的变化,如不对其进行科学的保护处理就会发生快速的腐朽变化。在选择保护处理方法前对木材的材性进行科学的分析可以为保护方法的确定提供科学的依据。本工作从木材成分、含水率、干缩性、出土泡桐与新鲜泡桐干缩率比较、干燥过程中的电镜分析几个方面对泗水国汉墓出土的泡桐进行了材性研究。结果表明,泗阳汉墓出土的泡桐纤维素和半纤维素的含量比新鲜泡桐的含量下降很多,但木质素的相对含量却增加了,说明泗阳汉墓出土的泡桐在埋藏环境中可能更多地是受到褐腐菌的侵蚀。含水率的高低是反映木材腐蚀度一个重要指标,泗阳汉墓出土的泡桐平均含水率高达1211%,从弦向、径向、横切面的平均收缩率数值来看,出土的泗水国泡桐文物收缩变形很严重,从电子显微镜图片观察,细胞结构各向干缩特性与新鲜木材完全不同。由此可见,不能用常规木材的干缩特征和木材的变化规律来指导泗水国出土泡桐的研究和保护工作,在选择保护处理方法时要结合木材本身的现状选择适合的材料和工艺。     

SPATIAL DIFFERENTIATION OF POPULATION DEVELOPMENT IN A DECLINING REGION: THE CASE OF SAARLAND

We increasingly understand the causes of population decline: these can be, among others, processes of deindustrialization, decreasing fertility or the succession of a city through the stages of urban life as the city matures. However, we are still insufficiently able to explain why differences still exist between cities within regions experiencing the same macro‐processes and between cities of the same “level of maturity”. This research addresses this intra‐regional differentiation in population development in the declining former mining region of Saarland (Germany). Quantitative and qualitative analysis reveals that the differentiation in current decline stems from (1) the differentiated population development trajectories of the past, with a massive population boom followed by an aged and declining population in the industrial municipalities; and (2) the spatial distribution of amenities over the region; and (3) the spatial distribution and accessibility of housing opportunities steering migration flows. The latter are not necessarily concentrated in those areas that are attractive. Rather, the distribution of these housing opportunities strictly follows the planning logic of the supra‐local institutional framework, with a concentration of housing within easy access of major transportation infrastructure and in larger centres. The case study thus reveals that the mechanisms behind this intraregional differentiation are much more complex than often portrayed in the urban development and decline debate.     

Burnt bones and teeth: an experimental study of color,morphology, crystal structure and shrinkage

Burnt osteological materials are one focus of interest in forensic, archaeological, and palaeontological studies. We document the effects of experimental, controlled heating on a sample of modern bones and teeth from sheep and goats. Four aspects of heating specimens to between 20 and 940°C were considered: color, microscopic morphology, crystalline structure and shrinkage. Our results show that changes in both color and microscopic morphology of burnt bones and teeth can be divided into five stages each of which is typical of a particular temperature range, although the stages based on color do not correlate exactly with those based on micromorphology. These stages can be used to determine (1) if specimens of unknown taphonomic history were burnt, and (2) the maximum temperature reached by those specimens. In addition, powder X-ray diffraction studies show that heating causes an increase in the crystal size of hydroxyapatite, the major inorganic component of bones and teeth. This fact in conjunction with the microscopic morphology can be used to confirm deduced heating to 645°C or more. The data on shrinkage are analyzed to yield a polynomial expression that summarizes percentage shrinkage as a function of the maximum temperature reached by bones. Thus, the original size of specimens can be reconstructed within limits since the maximum temperature reached by the bones can be deduced on the basis of color, microscopic morphology and/or powder X-ray diffraction patterns. Finally, because there is a discrepancy between the maximum heating device temperature and the maximum specimen temperature, caution must be exercised in distinguishing between the effects of man made and natural fires.