The use of SEM-EDS,PIXE and EDXRF for obsidian provenance studies in the Near East: a case study from Neolithic Çatalhöyük (central Anatolia)

In this paper we evaluate the relative analytical capabilities of SEM-EDS, PIXE and EDXRF for characterizing archaeologically significant Anatolian obsidians on the basis of their elemental compositions. The study involves 54 geological samples from various sources, together with an archaeological case study involving 100 artifacts from Neolithic Çatalhöyük (central Anatolia). With each technique the artifacts formed two compositional groups that correlated with the East Göllü Da? and Nenezi Da? sources. The non-destructive capabilities of these methods are emphasized (albeit with certain analytical limitations in the case of SEM-EDS), suggesting important new techniques for Near Eastern obsidian provenance studies.     

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。     

L’impossible constitution d’une théorie générale des machines ?

Three projects on the theories of machines are presented: “mecanology” of the architect Jacques Laffite (1932) inspired by biological evolution; “mecanical analysis ” of Louis Couffignal, a specialist in computing machines (1938), which pre figures functional analysis, and the algebraic theory of machines by the mathematician Jacques Riguet (beginning of the 1950’s). During those years, the three men are members of the Circle of Cybernetic Studies. The article focuses on the dialogue between projects, the axes of unification and divergence, and the styles, strategies and postulates of these three candidates, for generalization converging toward the reference constituted by cybernetics.     

'Who do you talk to,when a body's in trouble?: M. Nourbese Philip's (un)silencing of black bodies in the diaspora

This paper examines Marlene Nourbese Philip's 'Dis Place—The Space Between' to argue that black women's bodies are troubled by Philip in order to reconceptualize and reinvent location, corporeality, subjectivities, and dominant historical narratives. In situating blackness and black femininity within a displaced, or 'anywhere' framework, Philip scrutinizes and redraws the places of black women's bodies in the New World so that we might reconsider the geographical and historical importance of blackness. This paper therefore analyses how Philip takes up the chaotic in between-ness of black womanhood in order to embrace discourses and spaces of 'elsewhere' and possibility, while also acknowledging sites of racism, sexism, memory and struggle.     

Surviving through movement: the mobility of urban youth in Ghana

In Africa, young people are engaging with a globalised world of flows and movements but are coming of age in environments characterised by uncertainty, economic hardship and unemployment. Drawing upon research conducted in Madina, a suburb of Accra, a social navigation perspective is adopted to explore young people's everyday mobility and their aspirations for future mobility. By drawing attention to the meanings young people ascribe to movement, and by analysing their movements as tactics of social navigation, the importance of spatial mobility to young people's everyday well-being and their processes of social becoming are illustrated. Young people find that their mobility is bounded by a range of factors including labour market characteristics, gender and generational relations, and their spatial location on the outskirts of the city and the margins of the world. However, neither their daily mobility nor their spatial imagination is restricted to Madina; real or imagined travel takes them to other parts of the city, into rural areas and across the nation's borders. Through illustrating how significant mobility can be for everyday survival, this paper contributes to ‘the mobility turn’ in the social sciences which has overlooked the importance of mobility for livelihoods in the global South.     

Simple Scan Tests for Spatial Clustering on a Square Lattice

Many data sets collected for study areas consist of data values collected on a square lattice or for a set of pixels. Remotely sensed data provide perhaps the most common example. Frequently, we wish to know whether there are subregions of the study area that exhibit spatial clustering. In this article, we suggest how an approach for finding spatial clusters may be combined with the common practice of using 3‐by‐3 and 5‐by‐5 smoothing filters or kernels to construct two simple and easy‐to‐implement scan‐type tests. A simulation experiment shows that the power of these tests to find clusters compares favorably with an alternative test that is more complicated. The tests use simulated data, changes in a remotely sensed image for a study region in Texas, and data about wheat yields. Muchas bases de datos que se recopilan para una zona de estudio, consisten en valores recopilados en una retícula cuadrada o en un conjunto de pixeles. Los datos obtenidos por sensores remotos son quizá el ejemplo más común. Frecuentemente deseamos saber si existen subregiones de la zona de estudio que exhiban agrupamiento espacial. En este artículo, sugerimos cómo una aproximación para ubicar agrupamientos espaciales se puede combinar con la práctica común de usar filtros de suavizado (kernels) de 3‐por‐3 y 5‐por‐5 filtros, para construir dos test tipo scan, sencillos y fáciles de implementar. Un experimento de simulación demuestra que el poder de estas pruebas para ubicar agrupamientos, se compara favorablemente frente a otra prueba alternativa, que resulta más complicada. Las pruebas usan datos simulados, cambios en una imagen de satélite para un área de estudio en Texas, y con data acerca de los rendimientos de cultivos de trigo. 研究区收集的许多数据集是由基于方格网和像素采集的数据值组成的,遥感数据可能提供了最常见的范例。通常,我们希望了解研究区的子区域是否呈现空间集聚特征。本文提出了一种如何发现空间集聚的方法,可以与采用3*3和5*5平滑滤波或核函数的普通试验相结合,构造两个简单且易于操作的扫描试验。模拟实验结果显示,这些试验在寻找聚集特征的性能上优于更复杂的可替换性试验。文中所用的仿真模拟数据来源于德克萨斯州小麦产量的多时相遥感影像。     

Documentary Evidence and the Medieval Pottery Industry

EARLY in my study of the medieval pottery industry it became clear to me that, contrary to general belief, a reasonable body of documentary evidence bearing on the industry had survived, but that it would take some years to assemble and interpret. There is no corpus of documents from which to begin, for surviving evidence is not only scattered in a very wide variety of documents, but is also dispersed geographically in a number of local record repositories. It might seem sensible to delay publication until a larger proportion of this evidence has been studied, or at least to avoid analysis and generalization at this stage; but pottery and potters are of interest to archaeologists here and now, and there is nothing written on the industry save assemblages of unrelated facts, often strung together from widely different periods. An effort has, therefore, been made to assemble the material so far available into a coherent pattern. Since this is the first time that this has been done, the result will probably require drastic modification in a few years' time. If the interim report here presented stimulates others to prove it wrong, this paper will have achieved at least one of its purposes.¹