Limb bones asymmetry and stress in medieval and recent populations of Central Europe

Monitoring the degree of asymmetry in different parts of the human body can contribute to population studies, as it may be connected indirectly with the social structure, living conditions, and also with biomechanical stress affecting the person. Analysis of asymmetry may also assess preferential use of the right or left of the body during specific activities. This study is based on the measurements of bones of the upper and lower limbs of skeletons derived from the remarkable medieval cemeteries of Mikulčice‐Kostelisko (78 male, 132 female) and Prušánky (66 male, 69 female) (9th–12th centuries AD), and a series of skeletons representing a recent population from Bohemia (143 male, 157 female). The objective was to assess directional asymmetry (DA), fluctuating asymmetry (FA) and antisymmetry (AS) of the dimensions of the evaluated bones, and to use these data to compare the characteristics of the medieval and recent populations. DA was recorded in most dimensions. In the upper limb, the humerus exhibited the greatest expression of asymmetry, and, with the exception of the clavicle, DA was always more pronounced on the right side. Conversely, DA was less prevalent in the lower limb bones. It was more pronounced on the transverse, sagittal and circumferential dimensions of the diaphyses and epiphyses than on the length, and in most cases it was on the left side. The FA values were very low, and almost negligible in relation to the size. Nevertheless, FA was markedly more frequent on the lower than on the upper limb. In contrast to the medieval population, the recent population had higher FA and DA values. Thus, we propose that people from this medieval population were subjected to lower developmental stress than the recent sample. Copyright © 2008 John Wiley & Sons, Ltd.     

试析金代中都路城市群的发展演变及其空间分布特征

:本文以金代中都路地区城市群作为研究对象,对区域城市群的发展演变和空间布局进行了深入的探讨分析。本文认为,金代是北京地区城市发展的重要转折时期,随着金代社会经济的进一步发展,中都路城市群不仅在数量上有所增加,同时,金中都地区政治格局的改变、社会经济的进步以及交通格局的改善也使中都路城市群在地域结构上出现新的变化。在空间布局上,区域城市群呈现出以交通道路为骨架,按照河流流域组团分布的格局。     

基于腾讯迁徙数据的中国“春运”城市间人口流动空间格局

“腾讯迁徙”大数据基于位置服务，实时、动态、完整、系统地描述了用户日常出行活动的轨迹。通过采集“腾讯迁徙”数据平台中2018年春运期间中国346个地级及以上城市之间的逐日人口流动数据，分“节前、节中、节后”3个时间段，利用复杂网络分析方法，从人口流动的集散层级、集散体系分层集聚特征、人口流动空间格局、网络空间特征等角度分析各时间段城市间的人口流动特征与空间格局。结果表明，腾讯迁徙大数据直观地揭示了春运期间中国城市间人口流动空间格局，3个时段人口的净流入均呈现十字形骨架支撑的菱形分布，人流集散中心主要集中在京津冀、长三角、珠三角和成渝4大城市群，与城市等级有较强的一致性。人口流动集散体系呈明显的分层集聚，城市行政级别的高低与人口流动影响力存在一定的正相关关系，大部分城市人口流动处于“相对平衡”状态。人口流动网络呈现东密西疏的分布特征和东部并联、西部串联的网络关联特征。人口流动网络局部具有较明显的“社区”结构特征，聚为3个大区级、5个跨区域级和1个地区级社区。     

Korean unification: a solution to the challenges of an increasingly elderly population?

South Korea experienced below replacement fertility for the first time in 1983, which also marked the point from which fertility rates continued to decline over the next 20 years to reach a low of 1.2 in 2003. In spite of recent pronatalist policies, the fertility rate has remained near this level and has not increased appreciably. The reasons for sustained low fertility in South Korea are complex and solutions remain elusive. One option that has been suggested is reunification with North Korea, which could address the eventual decline in the population and mitigate the increasing proportion of the elderly. Although the conditions surrounding the German reunification experience were vastly different than what Korea will likely undergo, it is informative to look at Germany as a guide to the demographic parameters of reunification. Three projection models for 2015–2050 are presented; even the highest fertility models show that reunification will not be the answer to population restructuring already underway in South Korea as a result of sustained low fertility.     

论人口地理学应用研究的发展

本文从应用研究角度对人口地理学发展作一次理论和实践上的分析探讨。通过对人口地理学应用研究发展历程的回顾,对比中西方在发展上的差异,指出我国人口地理学是从实践应用开始走入发展的轨道,但同西方人口地理学相比,表现出应用研究方面的相对不足,而在由八十年代进入九十年代之际,应用研究作为当今学科发展的动力,促进人口地理学应用研究的发展出现定量化、社会化、中微观化的趋向,进一步显示学科的理论应用价值。意在加强我国人口地理学的发展,注重以应用为目的,密切结合当前生产实际问题的研究,扩展应用研究的范围、深化应用层次,不断改进应用研究的方法。     

山东省土地生产潜力与环境人口容量研究

通过分析山东省土地资源的数量、质量及利用结构的潜力和预测山东省的人口,进行土地生产潜力与环境人口容量研究,为充分发挥土地潜力提高山东省土地环境的人口容量提供科学依据。     

城市规模分布的分形和分维

研究城市规模分布的分形特征,修正了一些位序—规模模型,将历史上出现的有关城市规模分布的模型统一在分形形式之下,并给出了具有一般意义的三参数Ｚｉｐｆ模型：Ｐ（ｋ）＝Ａ（Ｋ－ａ）－ｑ。将Ｚｉｐｆ维数与大自然１／ｆβ起伏的β指数进行类比,认为分维Ｄ＝１／ｑ＝１是一种先验的优化维数,进而提出结构优化的１／ｒ型城市位序—规模分布,以此作为城市体系等级结构规划的依据之一。     

Pottery Production, Distribution, and Consumption—The Contribution of the Physical Sciences

The study of the life cycle of pottery, from the selection of raw materials and the production stage through distribution and use to ultimate discard, can make a valuable contribution to archaeological research. The aim of the present paper is to provide a summary and critical assessment of the particular contribution of the physical sciences to the reconstruction and interpretation of this life cycle, in large part through the presentation of selected case studies. The topics covered include the reconstruction of the technology used in pottery production, through a combination of microscopy, radiography, and chemical analysis; the investigation of the extent of craft specialization and the organization of pottery production; the reconstruction of pottery distribution from its production center, using thin-section petrography and chemical analysis, and the interpretation of these data in terms of exchange and trade; the reconstruction of the consumption stage or uses to which pottery was put, from the study of surface wear, organic residues, and performance characteristics; and a discussion of the reasons for the introduction of pottery and for the different technological choices made in pottery production. Throughout, the importance of considering the overall environmental, technological, economic, sociopolitical, cultural–ideological and historical context in which the pottery was produced, distributed, and consumed is emphasized. The paper is concerned, almost-exclusively, with unglazed earthenware spanning prehistory through to circa 1500 AD.     

基于GIS的吐鲁番地区古遗址空间分布及其影响因素分析

为了研究吐鲁番地区古遗址分布特征,运用GIS的空间分析方法对吐鲁番地区不同时期古遗址的空间分布特征进行了分析研究。从地形特征进行分析发现吐鲁番地区古遗址在海拔-100m~200m,坡度0~15度的洪积平原区集中分布。通过点线分析发现吐鲁番地区古遗址距河流,距道路距离都在一定的范围之内分布,可以得出古遗址的分布有线性分布的特征;通过聚集分析,发现吐鲁番地区古遗址具有以交河古城和高昌故城两个比较明显的聚集点为中心分布的聚集特性。研究古遗址的空间分布特征为古遗址的进一步的研究和保护提供重要参考依据。     

迁村并点理论与实践初探--以长安子午镇为例

迁村并点是解决三农问题、合理配置土地资源、消除城乡差别的重要手段,是实现区域空间整合的有效途径。本文对国内的迁村并点的研究现状进行了综述,以长安子午镇为例,通过对地域整体环境的把握,分析地域居民点之间的时空关系,提出区域整合的基本思路并对产业发展方向做了进一步的规划设想。