New Methods of Census Record Linking

The Minnesota Population Center (MPC) has released linked datasets through its NAPP and IPUMS projects, making them readily accessible to researchers. Prior to the availability of complete count census microdata from the MPC, researchers applied various forms of record-linking software. This essay describes the techniques used in the MPC's linking program and briefly compares this technique with those used by other researchers. The key feature of the MPC linking method is the construction of cumulative name similarity scores, based on approximately 2.5 billion record comparisons; we also use support vector mechanics to classify potential links. This article explains modifications made for the final linked datasets and includes a discussion of the role of weighting variables when using linked data.     

Can salmonids (Oncorhynchus spp.) be identified to species using vertebral morphometrics?

Remains of anadromous Pacific salmon and trout (genus Oncorhynchus) are common in archaeological sites from California to Alaska; however, morphological similarity generally precludes species identification, limiting the range of questions that salmonid remains can address in relation to past human use and ongoing efforts in conservation biology. We developed a relatively simple, rapid, and non-destructive way to classify salmon and trout vertebrae from archaeological contexts to species using length, height and the ratio of length to height. Modern reference material was obtained from all seven anadromous Oncorhynchus species native to the west coast of North America. A minimum of ten adult Chinook (Oncorhynchus tshawytscha), chum (Oncorhynchus keta), coho (Oncorhynchus kisutch), pink (Oncorhynchus gorbuscha), and sockeye salmon (Oncorhynchus nerka) and cutthroat (Oncorhynchus clarki clarki) and steelhead trout (Oncorhynchus mykiss) were skeletonized and vertebra length and height were measured. Morphometric analyses compared species classification success based on Linear Discriminant Analysis (LDA), Classification and Regression Trees (CART), and randomForest, with CART performing the best. Classification analyses used all seven species individually, but because of considerable overlap among several species we also conducted analyses on four species groupings. We assigned Chinook salmon and cutthroat to their own groups based on their dissimilarities from each other and the other species. The remaining species were divided into two group complexes (a) chum, coho, and steelhead; and (b) pink and sockeye. When we grouped species according to similar morphology, CART overall success rates increased, ranging from 92 to 100%. Individual species with the highest successful classification rates using CART were Chinook salmon and cutthroat, from 92 to 100%, respectively. We applied our classification to an assemblage of ancient (1000–3000 year old) salmonid vertebrae from the Swiftwater Rockshelters excavations on the upper Wenatchee River in Washington State, U.S.A.     

Von Vielschichtigkeiten und Verschränkungen “Kulturen der Wissenschaft – Wissenschaften in der Kultur”

On Multiple Levels and Linkages: Introduction to the Symposium ‘Cultures of Sciences – the Sciences in Culture’. – The article presents briefly approaches to cultural history and cultural studies that seem potentially useful to or have recntly been applied in historical studies of the sciences. The first section discusses three such approaches: discourse analysis, symbolic artefacts (images and text), and cultures of scientific practice. Each of the three approaches raises issues of its own, and all of them share a common problem characteristic of cultural and social history in general: linking micro and macro levels of analysis. The second section presents three approaches to resolving this dilemma by focusing on specific linkages between cultures of science (or culture in the sciences) and general history: scientific thought and practice as norms for professional behavior, for example in fields of knowledge dominated by women; spaces of knowledge, for example the city; and linkages of cultural, media and economic history in fields such as radio and television.     

The Thai Lao – Thailand's largest unrecognized transboundary national ethnicity

In 1900, the Lao ethnonym, and thus the Lao, ‘officially’ disappeared from Siam. However, Lao culture and identity persisted at local, regional, and national levels. As Keyes (1967) discovered, ‘a Northeast Thailand‐based ethno‐regionalism’ emerged post‐World War II. This regionalism, which we re‐term ‘Thai Lao’ and specify to the majority ethnic community, exists in a contested relationship with both ‘Thai’ and ‘Lao’ identity. The survival of the Lao ethnic community's cultural identity occurred despite the best efforts of the Royal Thai Government (RTG) to eradicate aspects of Lao culture. These aspects included Lao language, religion, and history, using the school system, the Lao Buddhist Sangha, and the bureaucracy. Beginning in the 1990s, buoyed by a multitude of factors, the Lao ethnic community reappeared as the ‘Thai Lao’ or ‘Lao Isan’. This reappearance was noted in the RTG's Thailand 2011 Country Report (RTG 2011) to the UN Committee responsible for the International Convention on the Elimination of All Forms of Racial Discrimination. For nearly four decades now, ‘Laoism’ has recurred in Thai academia, the media, the public sphere, popular traditions, and even Lao apocalyptic millenarianism. Following Smith (1986, 1991, 1999), this article utilizes a historical ethno‐symbolist approach to analyse this recurrence.     

Critical spatial learning: participatory mapping,spatial histories,and youth civic engagement

As digital technologies become ubiquitous in many places, scholars of civic engagement, youth and political life, and geographic education have explored the potential of teaching critical and spatial thinking through digital technologies. This paper examines interactive digital mapping as a technology environment for teaching and practicing critical spatial thinking, in relation to civic engagement. From this participatory and dialogic mapping project with teenage girls in Seattle, Washington, we develop a conceptualization of critical spatial thinking that emphasizes how social and spatial processes intertwine to generate societal inequalities and show how this learning informs students’ social and spatial civic responses. We show how interactive digital mapping pedagogies offer students an opportunity to develop awareness of what happens in their urban geographies, but also how and what they might do to intervene.