Statistical Network Analysis for Analyzing Policy Networks

To analyze social network data using standard statistical approaches is to risk incorrect inference. The dependencies among observations implied in a network conceptualization undermine standard assumptions of the usual general linear models. One of the most quickly expanding areas of social and policy network methodology is the development of statistical modeling approaches that can accommodate such dependent data. In this article, we review three network statistical methods commonly used in the current literature: quadratic assignment procedures, exponential random graph models (ERGMs), and stochastic actor‐oriented models. We focus most attention on ERGMs by providing an illustrative example of a model for a strategic information network within a local government. We draw inferences about the structural role played by individuals recognized as key innovators and conclude that such an approach has much to offer in analyzing the policy process.     

Impacts of Market Liberalization on Regulatory Network: A Longitudinal Analysis of the Swiss Telecommunications Sector

This article looks at the reconfiguration of the regulatory actors' network, as induced by the liberalization and reregulation processes in utility sectors. It investigates the changes in governance structures and patterns of collaborative ties between actors resulting from these processes. Applying stochastic actor‐oriented modeling (SAOM) to data on the liberalization of the Swiss telecommunications sector over two decades, we test whether and to what extent structural changes driven by liberalization and reregulation express themselves through network effects, that is, through changing patterns of interactions between political authorities, regulators, regulatees, and interest groups. Our empirical tests highlight a rearrangement of the regulatory network and a reorganization of relational patterns around new actors, such as the sector‐specific regulatory agency, coregulators, and new operators.     

Historical Epistemology: On the Diversity and Change of Epistemic Values in Science

Historical Epistemology: On the Diversity and Change of Epistemic Values in Science. Historical epistemology involves the claim that the system of scientific knowledge is not determined by the observations but is also subject to epistemic requirements that may change in the historical process of doing research. As a result, the system of knowledge is path‐dependent in that its shape is contingent on epistemic choices made at certain historical points. I attempt to elaborate this approach by drawing attention to the double role of epistemic values. First, such values create relations of significance and thereby contribute to directing research into certain avenues. Second, they are also important in the process of confirmation in that they entail that certain forms of agreement with the facts are superior and preferable to other such forms. Some epistemic orientations and reorientations can be reconstructed as arising from an interaction with nature, but others are based on commitments to the kind of knowledge we appreciate. The epistemic authority of science is created in large measure by rules of the scientific community that express how to deal with knowledge claims.     

Science and the History of the Sciences. Conceptual Innovations Through Historicizing Science in the Eighteenth Century

Science and the History of the Sciences. Conceptual Innovations Through Historicizing Science in the Eighteenth Century. The historical reconstruction of science is linked to philosophical discussions of the eighteenth century in many ways. The historiography of philosophy and the historiography of science share the conceptual problem to assemble the multitude of scientific and philosophical practices under general concepts. The historical analysis of scientific progress offers a clue by problematizing definitions of “science” and “sciences” as well as the system of sciences as a whole. By analyzing these conceptual problems and the typology of historical enterprises of the eighteenth century, this paper will discuss the close interrelations which existed between philosophical and historical discourses of eighteenth‐century reflection on science.     

Refining the Quadratic Crown Height Method of age estimation: do elk teeth wear quadratically with age?

Teeth are the basis for the best methods for estimating the age-at-death of archaeological and paleontological faunal remains, because they change by eruption and wear throughout an individual's life and because they preserve well. However, age-at-death can be difficult to estimate when teeth are isolated or when no known-age reference sample is available. For these reasons, researchers developed the Quadratic Crown Height Method (QCHM), a set of quadratic formulae that can be used to predict age-at-death from tooth crown height, when unworn crown height and the ages when the tooth erupts and when its crown height should reach zero can be estimated. Previous tests of the QCHM suggest that modified equations could improve the method. Here, we use crown height measurements on a sample of 226 known-age Rocky Mountain elk (Cervus elaphus) to perform such modifications. We adjust the age at which each tooth type's crown height reaches zero from the species' potential ecological longevity or average maximum life span to an age that we empirically estimate for each tooth type. We also empirically assess whether for different elk teeth the exponent in the QCHM formula is actually equal to 2; it is for M1, but for P4 it is about 1, indicating a roughly linear relationship. The exponents for M2 and M3 are intermediate, being closer to 1.5. Because different teeth wear at different rates and wear completely away at different ages, we recommend that researchers use the modified equations provided here to estimate age-at-death for samples of Cervus elaphus.     

Thalassaemia: Its diagnosis and interpretation in past skeletal populations

The diagnosis of thalassaemia in archaeological populations has long been hindered by a lack of pathogonomic features, and the non‐specific nature of cribra orbitalia and porotic hyperostosis. In fact, clinical research has highlighted more specific diagnostic criteria for thalassaemia major and intermedia based on changes to the thorax (‘rib‐within‐a‐rib’ and costal osteomas). A recent re‐examination of 364 child skeletons from Romano‐British Poundbury Camp, Dorset revealed children with general ‘wasting’ of the bones and three children who demonstrated a variety of severe lesions (e.g. zygomatic bone and rib hypertrophy, porotic hyperostosis, rib lesions, osteopenia and pitted diaphyseal shafts) that are inconsistent with dietary deficiency alone, and more consistent with a diagnosis of genetic anaemia. Two of these children displayed rib lesions typical of those seen in modern cases of thalassaemia. The children of Poundbury Camp represent the first cases of genetic anaemia identified in a British archaeological population. As thalassaemia is a condition strongly linked to Mediterranean communities, the presence of this condition in a child from England, found within a mausoleum, suggests that they were born to wealthy immigrant parents living in this small Roman settlement in Dorset. This paper explores the diagnostic criteria for genetic anaemia in the archaeological literature and what its presence in ancient populations can contribute to our knowledge of past human migration. Copyright © 2010 John Wiley & Sons, Ltd.     

Late Epipaleolithic hunters of the central Taurus: Faunal remains from Direkli Cave,Kahramanmaraş, Turkey

Newly initiated research at Direkli cave is helping to define an initial understanding of Epipaleolithic hunter‐gatherer traditions in the central Taurus region of southern Turkey. Detailed analysis of the Direkli faunal assemblage suggests that in the late Epipaleolithic the cave functioned as a short‐term logistical camp used to intercept wild goats (Capra aegagrus) in the high peaks around the cave, primarily in the late summer and fall. In addition, hunters opportunistically exploited deer and a variety of other small taxa, including tortoise, in the forested vicinity of the site. Evidence for low intensity and seasonal occupation of the cave indicates that Epipaleolithic foragers in the region were highly mobile, utilised a wide range of resources, but primarily scheduled use of the cave in order to exploit high ranked wild goat resources. This represents the first window into the nature of foraging systems just prior to the emergence of agricultural economies in this important region of Turkey. Copyright © 2010 John Wiley & Sons, Ltd.     

The Mollö Cog Re‐Examined and Re‐Evaluated

As part of a research project on medieval trade and maritime transportation in the former Norwegian province of Bohuslän, western Sweden, a dendrochronological analysis of the so‐called Mollö cog was undertaken. The wreck, which was first salvaged in 1980, was previously dated by ¹⁴C analysis. Since this provided a nearly 400‐year time‐span for the building of the vessel, a more precise dating was considered essential. In conjunction with dendrochronological sampling, several features not previously reported were recorded. This paper presents the find, the research history and the results of the dendrochronological investigation. © 2012 The Authors     

Team Arab: al‐Jazeera and the flagging of everyday Arabism during the 2008 Beijing Olympics

The linking of living rooms across state borders by al‐Jazeera and other pan‐Arab satellite television channels has prompted claims that a ‘new Arabism’ that undermines state nationalism is emerging. Until now, analysts have mostly focused on the ‘hot’ Arabism in the news coverage of politicised events such as the Israel–Palestine conflict. This article offers a new dimension by suggesting that as important to satellite television's construction and reproduction of Arab identity is the everyday discourse found in less overtly political programmes such as sport. To demonstrate this, it offers an analysis of al‐Jazeera's coverage of the 2008 Beijing Olympics showing how the broadcasts address viewers as a common Arab audience who are simultaneously encouraged to be nationalistic towards their separate nation‐states within a given ‘Arab arena’ of states with whom they should primarily compete. This suggests that new Arabism should in fact be considered a ‘supranationalism’, not a revived Arab nationalism as it simultaneously promotes Arab and state identities in tandem. Finally, it aims to expand our understanding of ‘everyday nationalism’ by adapting Michael Billig's theory and methodology of ‘banal nationalism’ in British newspapers to facilitate the study of sport on supranational Arab identity on satellite television.     

Fluid control on low‐temperature mineral formation in volcanic rocks of Kahrizak,Iran

The Kahrizak volcanic field, south Tehran, in Iran, is composed dominantly of basalt and basaltic andesite that experienced variable degrees of alteration because of the low‐grade metamorphism (stage I) and hydrothermal activity (stage II). Stage I alteration, which occurred in response to the burial of volcanic rocks and their interaction with heated groundwater, is characterized by the formation of low‐temperature zeolite facies minerals in vesicles consisting mainly of fine‐grained mafic phyllosilicate (smectite, chlorite/smectite mixed layer) and zeolites (thomsonite, chabazite, gonnardite, natrolite, analcime, heulandite, and mordenite). Stage II mineralization occurred because of the activity of hydrothermal fluids that formed large crystals of heulandite, stilbite, mesolite/scolecite, natrolite, and analcime along with quartz and calcite in cavities and fractures. The elements necessary for the formation of alteration minerals (i.e. zeolites and mafic phyllosilicates) in Kahrizak were derived from the hydrolysis of olivine and volcanic glass as well as the alteration of plagioclase. Various mineral assemblages formed during stages I and II reflect changes in temperature, pressure, and fluid composition. The change from mafic phyllosilicates to zeolites species is caused by the decrease in Mg and Fe relative to Ca fluid activities. Zeolite assemblages of stage I, known to be formed at lower temperatures, show the general sequential order from older to younger: chabazite, thomsonite, gonnardite, and natrolite. This sequence is consistent with a hypothetical fluid evolution path with increasing Na⁺ relative to Ca²⁺ activity. The change to stage II, which consists of zeolites species (stilbite, scolecite, natrolite, mesolite, analcime, and heulandite) that formed at higher temperatures, can be attributed to a temperature increase and fluid influx caused by hydrothermal activity related to a later magmatic event in the region.