Dendroarchaeology of the mid-first millennium AD in Constantinople

The 1st millennium AD was a time of great transition in Europe and the Mediterranean. At the heart of the Byzantine Empire, Constantinople (modern day Istanbul) was a pivotal trade hub for the Aegean region. Establishing a precise and accurate dating framework for the development of this remarkable city and a chronological reference for this critical time period for the Mediterranean region is of great importance to a wide range of scholars. Here we present a new 213 year tree-ring record from 89 oak samples placed in time by dendrochronology and supported by radiocarbon analysis and historical documentation. It represents the middle of the first millennium AD in Constantinople. The tree-ring series are derived from pilings recovered from the extraordinary excavations of the so-called “Theodosian harbor” at Yenikap?, Istanbul, along with timbers from other sites and buildings around the city, including one of the most famous sites on the Istanbul sky-line—Hagia Sophia. They provide potential for new insight into a time period in which earthquakes, the Justinianic plague, and even a possible tsunami struck the city, and during which dramatic changes in climate have been recorded in other paleoenvironmental proxies. The chronology is the first published tree-ring series from the Aegean region to cover the ‘event’ years of AD 536–7 and 542 which are characterized by anomalous growth in other tree-ring series from around the world, but interestingly these event years are not evident in this tree-ring sequence.     

Poesis and Immediacy: A Reply to Davis

Abstract

It is argued here that the Christian doctrines of Trinity and creation make imperative the notion of "mediation" as God's mode of existing in himself and toward us, as well as our mode of existence in God's grace. This is the case in Saint Thomas's account of grace, and it is also the basic configuration of Sergei Bulgakov's sophiology. Josh Davis's understanding of grace, by opting for immediacy as our mode of dependence on God, ultimately fails to give a full account of human cooperation, and in so doing establishes a competitive relation between human and divine agency.     

四川客源集散地现状分析

该归纳分析了四川作为客源集散地的现状,结构特征及影响因素,在此基础上对四川作为客源集散地提出了探索性对策。     

汉代建筑明器探源

根据古文献、考古资料和相关研究成果,文章对汉代建筑明器的渊源进行了系统的分析论证,认为建筑明器的出理是西汉初期社会墓葬思想急剧变化的产物,是早期墓葬绘画所描绘建筑的物化表现,代表了墓主的部分建筑财富。并认为建筑明器在汉代墓葬中重新出现的年代应在西汉初期。     

Going mobile: perspectives on aligning learning and teaching in geography

There has been little consideration to date regarding how we might best adjust our assessment protocols so that the overall learning experience remains appropriately aligned to both content and teaching approach when adopting location-specific mobile learning. This paper explores the success of a novel strategy to design an assessment regime that captures a field experience in Dublin as a whole for both staff and students alike. Evaluation identified that the use of a combined mediascape-essay approach as a major component of the assessment successfully captured the main elements of the learning and teaching experience and facilitated deeper learning and creativity.     

日本的海权观及其海洋领土争端——一种建构主义的尝试分析

东北亚国家对于海洋权益的认知渐进深入,以及地缘政治实况和国家实力消长等,构成了社会意识与物质力量变迁的合力,加剧了日本与周边国家之间普遍存在海洋领土争端这一社会情势。当代西方国际关系理论中的建构主义为上述实况提供了一种新的思维尝试、分析框架与消解困境的方案补充。东北亚海洋领土争端困境的解决关键在于如何利用预留的政治空间。     

Application of Non-Destructive Techniques in the Inspection of Wooden Structures of Protected Buildings: The Case of Nuestra Señora de los Dolores Church (Isla Cristina,Huelva)

This study describes a thorough inspection of a 20th century church in the town of Isla Cristina (in the province of Huelva, southwestern Spain), which is currently awaiting restoration. The study indicates the damage processes at work in the building structure materials (brick, concrete, steel, and wood), which are closely related to its geographical location, and analyses the deterioration of the wooden roof structure. The analysis of the wooden roof includes the results of an inspection methodology on a protected building based on traditional techniques such as visual inspection and innovative non-destructive inspection techniques (visual classification, ultrasounds and thermography). Fieldwork consisted of the visual classification of the wooden pieces according to Spanish standard UNE 56544:2007 specifications after which ultrasound and thermography techniques were applied on-site. A second stage involved laboratory tests (anatomic identification, density and bending strength) using wood samples extracted from the structure in order to check the values for the physical and mechanical properties previously recorded by non-destructive techniques (NDT). These non-destructive techniques are used in inspections of the wooden roofs of buildings to identify dampness, deterioration, density loss and defects as a means of assessing their conservation status. This work concludes that the use of ultrasound and thermography techniques constitute an accurate diagnostic tool for the on-site inspection of wooden structures and the evaluation of their condition. Thermography identifies different materials and moisture content while ultrasound detects the various degrees of deterioration and density-loss in areas of the wood with high moisture content.     

A Hybrid Masonry and Steel Mirror-Type Vault with Lunettes: Survey and Structural Analysis

ABSTRACT

The structural analysis of a mirror-type vault, consisting of a single- or double-curvature perimeter and a nearly flat part, is carried out. The vault is similar to a number of hybrid iron (or steel) and masonry vaults built between the late 19th century and the early 20th century to span large halls. The numerical analyses were preceded by an accurate geometrical survey and mechanical tests aimed at evaluating the properties of the materials. Thermography allowed the complex brick pattern of the vault to be detected. The influence of rib-walls (frenelli) and the material anisotropy on the stress and deformation of the vault is discussed. Eventually, attention is focused on one of the segmental vaults in the central part of the structure: it is found that the stress can be safely estimated by assuming its boundary to be fixed.     

区域产业结构演变城市化响应形态的演化规律

引入\"产业结构演变的城市化响应形态\"的概念,从单一城市和城市群体两个空间层次构建产业结构演变城市化响应形态的理论模型,揭示产业结构演变城市化响应形态演化的一般规律,得出以下结论:伴随着经济发展以及产业结构的优化升级,城市从单一的城市形态逐渐向城市群体空间形态演化,从都市区到城市整合体,城市群体形态不断发展演化.在现代快速化、立体化交通体系的支撑下,城市(城市群体)迅速走向区域,并最终向区域空间功能一体化形态演化.并以长春市为研究案例,进一步印证了产业结构演变城市化响应形态演化的一般规律.     

Some Political Processes of Ranked Societies

This article explores the emergence of inequality in two regions of Mesoamerica: the Soconusco and Valley of Oaxaca. Dichotomous models that propose a continuum of political strategy (i.e., Leach 1954; Renfrew 1974; Spencer 1993; Blanton et al. 1996) are used to examine the different processes evident in the comparison of settlement, mortuary, and architectural data between these two regions. The elite in Early and Middle Formative Soconusco appear to integrate society with a comparatively external oriented and exclusionary strategy whereas in the Valley of Oaxaca Early and Middle Formative elites employed a more group-oriented, internally focused, and corporate strategy. Environment richness and proximity of competing communities may account for the primary, and perhaps unintentional, emergence of inequality in the Soconusco around 1400 B.C.E. In the Valley of Oaxaca inequality emerged as many as 250 years later in a less circumscribed area. Such environmental, political, and chronological factors may be responsible for some of the differences in integrative strategies evident in the two regions.     

我国城市系统的形成和演进机制

我国城市系统的演进可归纳为萌芽与形成、低级均衡和合理不均衡三个阶段。形成和演进动力在于人类活动与产业及其空间实体的相互作用,其核心要素是行政等级城市网络、经济发展和市场联系与交通设施。文章指出城市系统合理演进应采取\"组织与自组织\"的战略,提出我国未来城市发展阶段(扩散均衡阶段和有序网络化阶段)及城市系统特征:中心城市网络体系的形成;城市职能的综合性与分异性;城市集聚区的形成和相对均匀分布。     

旅游制度变迁:基于系统科学视角的研究范式与理论研究体系探讨

现阶段旅游制度相关研究成果一方面很难辨析旅游制度变迁理论及其个案论争,另一方面由于无法深入研究旅游制度变迁背后的运行机制及其规律性,从而无法形成理论研究体系与范式。有鉴于此,本文以系统科学、博弈论思想为指导,在明晰旅游制度及变迁涵义的基础上,尝试探究旅游制度变迁理论体系构建问题,其内容包括:①概念界定:将旅游制度界定为一个制度主体之间关系耦合的复杂系统;②研究范式:提出旅游制度变迁研究需摒弃新古典经济学所秉持的\"完全理性、均衡、静态制度观\",转向一种\"有限理性、动态、演化的制度观\";③理论研究体系:分析旅游制度变迁动力、变迁机制与规律,构建旅游制度变迁理论研究体系。     

Towards a Risk Management and Conservation Plan for the Djin Blocks at the World Heritage Site of Petra,Jordan: The Case of Djin Block No. 9

Cultural heritage is subjected to many pressures and risks. Over the past few years, the use of digital technologies has significantly changed the approaches to cultural heritage documentation for the purpose of condition assessment and conservation. The integration of novel approaches and techniques has permitted a detailed examination and assessment of damage, deterioration due to weathering and erosion, and their mechanisms. This study seeks to contribute to the preservation and conservation of the significant heritage of the so-called Djin Blocks at the World Heritage Site of Petra in Jordan. While these three dimensional cuboid rock-cut monuments have been subject to extensive conservation studies, this is the first time they have been subjected to 3D recording and multispectral photography, with the aim of recording damage caused by the ravages of time.

This study presents the results of the documentation of the case study Djin Block No. 9. A variety of systematic documentation techniques were used, including 3D recording with terrestrial laser scanning (TLS), close-range photogrammetry, multispectral imaging, and thermography records. In addition, pathological studies of the erosion from various causes and an analysis of the effect of weathering on Djin Block No. 9 are performed. Based on this data, the paper presents recommendations for developing risk management and conservation planning of Djin Block No. 9.     

城市系统演化模型与模拟分析

本文详细地介绍了P. M. Allen的城市系统演化模型(EMUS),对EMUS模拟的部分结果与城市地理的一些联系也作了详细分析,如城市发展过程模拟, EMUS与Zipf法则, EMUS与中地论, EMUS中的决策效应模拟等。     

建国以来党和国家领导制度的历史考察

建国以来,党和国家建立并实行以民主集中制为原则的集体领导和个人分工负责相结合的领导制度。本文从其历史渊源、具体实践中的探索、完善及创新三个方面,阐述了建国以来党和国家领导制度的历史演变。     

A permeability‐change model for water‐level changes triggered by teleseismic waves

Although many hydrologic changes induced by teleseismic waves have been reported, the mechanism(s) responsible for the changes are usually not known. Permeability changes induced by seismic strains are often invoked to explain changes in water level. Using water‐level data in Taiwan after the 2008 Wenchuan earthquake, we show here that the observations cannot be properly explained by previously proposed models of postseismic permeability changes. A new model is required in which the postseismic permeability decreases exponentially as a function of time, with a time constant of <3 min, which is appreciably shorter than inferred from earlier studies. The result may have important implications for pore‐sealing mechanism(s).     

Evolutionary approaches in archaeology

Two evolutionary approaches in contemporary archaeology, selectionism and processualism, are compared in terms of their theoretical perspectives, methodologies, and empirical contributions. Selectionism is a tightly focused approach that aims to apply a strict Darwinian framework to the study of cultural evolution. The selectionists view cultural evolution as a shift in the relative frequencies of cultural traits; the evolutionary mechanism that brings this about entails undirected variation followed by selection in a manner analogous to biological evolution. Processualism is a more flexible approach that acknowledges the importance of variation and selection but employs these concepts in a broader framework that recognizes fundamental differences between cultural and biological evolution. Among them are the central roles played by directed variation and the hierarchical operation of selection in cultural evolution. As we enter the late 1990s, the selectionists appear comfortably ascendant while the processualists often seem in disarray—they appear less confident, more embattled, more internally diverse. This diversity and dynamism, however, may harbor great potential for further growth and development. It is suggested that processualism's ongoing ferment will spawn the evolutionary archaeology of the future.