Characteristics of polar cap aurora

The characteristics of extremely high-latitude dayside auroras are examined by using auroral TV data obtained at Godhavn, Greenland, and simultaneous DMSP particle data. Two different kinds of aurora are found near the pre-noon sector, namely (1) the polar arc: this aurora is observed during quiet periods and originates from the dayside region. It is related to about 100 eV electron precipitation or less, and (2) the polar corona: this aurora is observed during disturbed periods and the appearence latitute of this aurora is confined within a certain region about 70–80° MLAT. It is related to a few hundred eV electrons. These results suggest that the origin of the polar arc seems to be the plasma mantle or low-latitude boundary layer, and the origin of the polar corona seems to be the low-latitude boundary layer or Boundary Plasma Sheet.     

“FUTURE PAST”: TIME AND TELEOLOGY IN (ANCIENT) HISTORIOGRAPHY

The historian's account of the past is strongly shaped by the future of the events narrated. The telos, that is, the vantage point from which the past is envisaged, influences the selection of the material as well as its arrangement. Although the telos is past for historians and readers, it is future for historical agents. The term “future past,” coined by Reinhart Koselleck to highlight the fact that the future was seen differently before the Sattelzeit, also lends itself to capturing this asymmetry and elucidating its ramifications for the writing of history. The first part of the essay elaborates on the notion of “future past”: besides considering its significance and pitfalls, I offset it against the perspectivity of historical knowledge and the concept of narrative “closure” (I). Then the works of two ancient historians, Polybius and Sallust, serve as test cases that illustrate the intricacies of “future past.” Neither has received much credit for intellectual sophistication in scholarship, and yet the different narrative strategies Polybius and Sallust deploy reveal profound reflections on the temporal dynamics of writing history (II). Although the issue of “future past” is particularly pertinent to the strongly narrative historiography of antiquity, the controversy about the end of the Roman Republic demonstrates that it also applies to the works of modern historians (III). Finally, I will argue that “future past” alerts us to an aspect of how we relate to the past that is in danger of being obliterated in the current debate on “presence” and history. The past is present in customs, relics, and rituals, but the historiographical construction of the past is predicated on a complex hermeneutical operation that involves the choice of a telos. The concept of “future past” also differs from post‐structuralist theories through its emphasis on time. Retrospect calms the flow of time, but is unable to arrest it fully, as the openness of the past survives in the form of “future past” (IV).     

High‐boron and High‐alumina Middle Byzantine (10th–12th Century ce) Glass Bracelets: A Western Anatolian Glass Industry

The trace element boron is present in most ancient glasses as an impurity, and high boron (≥ 300 ppm) marks raw material sources that are geologically specific and relatively uncommon. Recent analyses of Byzantine glass with high boron contents suggest that glass‐making was not limited to the traditional regions of the Levant and Egypt, and a production origin in or near western Anatolia is proposed. Glass bracelets from ?i?n al‐Tīnāt in southern Turkey give fresh evidence for the production and circulation of high‐boron glasses that closely correlates with object typology. The patterning of findspots suggests that high‐boron glass was closely connected to the Byzantine world.     

Between Spectacle and Science: The Aurora in Central Europe, 1870s–1880s

Abstract

The article discusses the return and reception of two Austro-Hungarian arctic expeditions in 1874 and 1883, respectively. Both expeditions conducted extensive auroral research. The article focuses on the media discourse of the time: how the expeditions including their scientific aims and outcomes were perceived in the Viennese press and society. The reception given to each of the expeditions and the manner by which each was covered in the press differed greatly; accordingly, the aurora borealis, a quintessential polar phenomenon itself, was ascribed with strikingly dissimilar meanings in the media. Whereas in 1874 domestic interests were projected onto the Arctic, with the aurora symbolizing the monarchy's bright future, in 1883 media attention focused on local events such as the International Electrical Exhibition in Vienna; the Arctic no longer served as a potent symbol for Austro-Hungarian affairs. Analyses of various forms of media such as texts, poems, and illustrations show the cultural situatedness of scientific knowledge and its popularization. Representations and interpretations of the aurora can only be understood within the political, social, technological and cultural contexts of the time.     

KLAVS RANDSBORG AND THE NINTH CENTURY AD

Archaeology over the past fifty years has shown that in the early 9^th century Western Europe experimented with a coalescing of states affirmed by a common reform ideology and with it increased communication to regions beyond. At different speeds, regions of Western Europe adopted this new strategy known as the correctio. Within a generation, the correctio gave rise to a new ‘feudal’ economy and significantly a new regionalism. The archaeology of Europe shows that there were winners and losers in these fast‐changing regions. The losers, in many cases, controlled the written narratives and ascribed their altered socio‐economic condition to the Others of the time, not least because the Others were leading exponents of the post‐correctio economic agenda. This paper revisits Klavs Randsborg's groundbreaking book, The Viking Age of Denmark, in the context of post‐war approaches to Europe's post‐classical narrative.     

DAVID CARR'S THEORY OF EXPERIENCING TIMES PAST

This article is a review of David Carr's “Reflections on Temporal Perspective” in which Carr argues that present‐day historians or philosophers can experience the past, given that the past persists into the present and thus has a “presence” in contemporary life that makes it directly accessible to us. On that basis, Carr seeks to craft a phenomenological approach to history that puts experience in the place of representation and memory, rejecting thereby traditional notions of how we come to know and understand the past. Inherent in this approach is a new, and now widely shared, revision of our understanding of historical temporality, for such an experiencing of the past analytically demands a revised understanding of what “past” signifies when it is “present.” In this, Carr participates in a much broader movement in current historiography, which can be seen in the work of Frank Ankersmit, Hans Ulrich Gumbrecht, Dominick LaCapra, Ewa Domanska, Eelco Runia, and others who focus on the persistence of the past in the present, embracing a materialist rather than linguistic or narrativist approach to historical research and writing. But if history signifies change over time, what “past” in the present do we actually experience? How is it logically possible to embrace both a commitment to the notion of historical development—as Carr does—and a notion of historical perseverance so powerful that the past as such survives and can be experienced? Carr's answer to this query is that “the present point of view is somehow permanent and yet always changing, framed at each moment by a different past and future.” What makes this possible, in his view, is the reality of superimposed temporalities, an idea he illustrates in his analysis of Braudel's La Mediterranée and other works. Hence it is precisely his “reflections on temporal perspective” that enable the experience of the past.     

Low latitude auroras: the storm of 25 September 1909

Visual auroras at low latitudes are rare, documented for only five occasions since 1859. They are important from a theoretical point of view in terms of the lowest latitude at which particle precipitation can been observed. One of the great magnetic storms of the past 150 yr occurred on 25 September 1909, during the prolonged solar activity minimum around the beginning of the present century. A report of an auroral sighting at Singapore, not far from the magnetic equator, the lowest latitude ever reported for a visual aurora. has focussed attention on this event. This paper compiles and discusses the solar, magnetic, auroral, and telegraphic disturbance data related to the event. The data show that the lowest credible magnetic latitude for this event was between 30° and 36°. I conclude that the report of a visual auroral observation at Singapore, based on a single Australian newspaper item, was almost certainly not auroral at all, but rather resulted from cable disturbances, known to be associated with auroras, and confused with the aurora itself. Furthermore, consideration of the height at which particle precipitation would be observed leads to an estimate of a threshold magnetic latitude for a visual auroral event of the order of 15°, greater than that of 'Singapore. This result removes the necessity of theories of major storms to account for such a low latitude sighting.     

Reserve Selection for Nature Conservation in South Australia: Past,Present and Future

This paper re‐examines the chronology of reserve selection in South Australia in the context of changing social, political and economic attitudes. The effect of these changing attitudes on reserve selection in South Australia is assessed in the light of the principles of a comprehensive, adequate and representative (CAR) National Reserve System. The outcome of reserve selection in South Australia is the establishment of a vast network of reserves in the arid regions and many fragmented and small reserves in the agricultural regions. It is likely that the remnant ecological system in the agricultural regions is not representative of the regional environmental diversity and that land clearance has precluded the establishment of a CAR reserve system in South Australia. The rate of reserve selection for nature conservation has decreased over the past decade as the opportunities for reserve acquisition decrease. It is concluded that large‐scale and strategic revegetation will be required to facilitate a CAR reserve system in South Australia.     

A Review of the Environmental Policy Literature from 2014 to 2017 with a Closer Look at the Energy Justice Field

This review article documents and analyzes trends within the environmental policy literature published between 2014 and 2017. We find that environmental policy scholarship has recently shifted its focus from more traditional topics, such as watershed and ecosystem management, to other modern issues, such as climate change and energy. The environmental policy literature has increased in complexity and become more interdisciplinary in nature, which we illustrate with a discussion of the energy justice literature. The methodological approaches used by environmental policy scholars have also become increasingly diverse, with a notable uptick in statistical and modeling approaches. We find that some topics, such as policy failure, gender issues, and energy welfare policies are under‐explored, and certain regions within the world, such as developing countries, are less frequently studied. We encourage scholars to consider these gaps in the literature when developing future research.     

Global Incorporation and Local Conflict: Sierra Leonean Mining Regions

Abstract: This paper draws upon a world‐system core–periphery framework to examine the nature and causes of persistent low‐level conflict in Sierra Leonean mining regions. Conflict is endemic because of asymmetrical power relations between global core‐state corporations and peripheral weak‐state Sierra Leone, which are mirrored locally within its mining regions. Structural constraints inherent in these relationships generate and sustain socioeconomic, cultural and environmental inequities. The paper reveals the complex web of micropolitics in the mining locale core‐periphery microcosm involving a weak state, exploitative corporations and oppressive traditional social hierarchies. The findings are relevant to effective policy making and conflict resolution.     

Spatio‐Temporal Modelling As A Way to Reconstruct Patterns of Past Human Activities

This paper examines the possibilities of creating quantified models of past human activities in both time and space. The study area lies in the south‐eastern Czech Republic and western Slovakia. The spatio‐temporal model of behavioural categories was calculated with the help of Monte Carlo simulations and statistical testing. One of the main advantages of our approach is that it admits the probabilistic nature of input data, quantifies them and provides probabilistic results comparable with other proxies. It also presents a less biased way of how archaeological data from regions and periods with low numbers of ¹⁴C datings can be incorporated into models of past population dynamics.     

EUROPEAN UNION REGIONAL PRODUCTIVITY DYNAMICS: A “DISTRIBUTIONAL” APPROACH*

ABSTRACT Working within the “distributional approach,” this research offers evidence of past and future polarization in aggregate regional labor productivity in EU‐15. This finding is robust to alternative definitions of the spatial units used and does not appear to be the result of regional structural change. Spatial effects are found but are of rather localized nature. Turning to separate sectoral analyses suggests that past and future polarization in labor productivity across European regions may be associated with regional productivity differences in the services sectors.     

Mineralogical And Chemical Investigations Of Bloomery Slags From Prehistoric (8th Century Bc To 4th Century Ad) Iron Production Sites In Upper And Lower Lusatia,Germany

More than 400 fayalitic bloomery slags from prehistoric iron production sites in Upper and Lower Lusatia, eastern Germany, as well as bog iron ore samples and intermediary samples of the smelting process, were analysed by chemical and mineralogical techniques. While the precursor bog iron ores exploited in the two regions under investigation were very similar in composition, consisting of low‐manganese/low‐barium as well as high‐manganese/high‐barium types of ore, pronounced differences in slag composition were detected. Slags from 17 investigated sites in Upper Lusatia showed average P₂O₅ contents between 1 and 3 mass%, whereas slags from 15 investigated sites in Lower Lusatia were generally much richer in phosphorus, reaching values as high as 7 mass% P₂O₅. Since a reasonable correlation exists between calcium and phosphorus contents in the slags of the latter sites, it is conjectured that deliberate addition of CaO to the ore/charcoal charge of the bloomery furnace may have taken place in order to fix the phosphorus in the slags effectively. In many samples, this conjecture is being supported by the detection of a slag mineral Ca–Fe phosphate Ca_9?xFe_1+x(PO₄)₇ that presumably crystallized from a residual phosphorus‐rich melt and shows a cotectic relationship to both Ca‐rich fayalite and wustite, as well as to members of the solid solution series magnetite–hercynite.     

THE BLUE ENAMELS IN THE BAROQUE DECORATIONS OF THE CHURCHES OF PALERMO,SICILY: FE2+‐COLOURED GLASSES FROM LIME KILNS*

Deep blue glasses coloured by octahedral Fe²⁺ cations are often reported as textbook examples of blue pigmentation. However, despite the possibility of laboratory synthesis under reducing conditions, to date there are no well‐reported occurrences of their production and use in the past. A thorough historical, ethnographic, mineralogical, and chemico‐physical investigation of the ‘smaltini di calcara’ from several baroque churches in Palermo, Sicily, has revealed that the blue enamels widely used for altar decorations in the 17th and 18th centuries are actually a unique case of ancient blue glasses pigmented by divalent iron cations in distorted octahedral coordination. This mixed‐alkali glass was accidentally produced under severely reducing conditions in the local kilns during production of lime.     

A MULTI‐ANALYTICAL APPROACH FOR THE CHARACTERIZATION OF COMMODITIES IN A CERAMIC JAR FROM ANTINOE (EGYPT)*

This paper describes a multi‐analytical chemical study performed on the original, almost totally conserved, content of a small ceramic jar from the Antinoe archaeological site (fifth to seventh centuries ad, Roman Egypt) and now belonging to the archaeological collection of the Istituto Papirologico ‘Girolamo Vitelli’ (Florence, Italy). Scanning electron microscopy with an energy‐dispersive X‐ray spectrometer (SEM–EDX), Fourier transformed infrared spectroscopy (FTIR) and X‐ray diffraction (XRD) were all used to characterize the inorganic components of the archaeological material. The organic substances were analysed using FTIR, direct exposure mass spectrometry (DE–MS) and gas chromatography – mass spectrometry (GC–MS). The inorganic component essentially consisted of halite (NaCl). Among the NaCl crystals, lamellar elements were identified. They were chemically characterized by carbonato‐apatite and showed a concentric morphology typical of the scales of small fish. The most prevalent organic constituents of the sample were monocarboxylic acids, α,ω‐dicarboxylic acids, and cholesterol and its oxidation products. The organic material composition was consistent with the occurrence of lipids of animal origin. In addition, diterpenes related to pine pitch were also identified. The overall results suggest that the material recovered in the small ceramic jar found in Antinoe is a residue of fish‐based pickles such as garum, muria, allex and liquamen, which were commonly used in Roman times.     

Erdoğan’s pragmatism and the ascension of AKP in Turkey: Islam and neo‐Ottomanism

This article aimed to analyze the ascension of Justice and Development Party—Adalet ve Kalk?nma Partisi (AKP)—in Turkey and its political measures regarding both Islam and the country's Ottoman past, in order to comprehend the party's role in a potential shift of Turkish national identity and in Turkey's relationship with the Middle East. The article does this through a content analysis of decrees, laws, and other measures taken by the AKP that emphasizes its cultural and religious policies, as well as revisiting literature produced about the subject. Analyzing Recep Tayyip Erdo?an's government during his time as Prime Minister (2003–2014), two noteworthy features come to light: its Islamic influence and its so‐called neo‐Ottomanist outlook. However, this article argues that besides an identity‐ and ideology‐based motivation, the AKP had pragmatic intentions in adopting such approaches, aiming to gather support both domestically and regionally.     

Economic growth and restructuring in Canada's heartland and hinterland: From shift‐share to multifactor partitioning

The geography of the Canadian economy has long been dominated by heartland‐hinterland contrasts, with manufacturing identified as the dominant function of most heartland cities in analyses of the 1961 and 1971 census data. However, the proportion of employment in manufacturing has been declining in the heartland provinces of Ontario and Quebec over the past fifty years and some geographers argue that the heartland‐hinterland dimension of the regional economy is being overridden by city‐regions that are integrated into global networks of production and trade. The heartland‐hinterland trends are examined using multifactor partitioning (MFP), an advanced shift‐share methodology, for the period of 2001–2006. This is the first intercensal period in which Canadian business has faced the full impact of the removal of North American tariff protection and the increased globalization of the Canadian economy. The data covers employment by eighteen industry sectors for the seventy‐three economic regions defined by Statistics Canada. MFP measures the region and industry‐mix effects, which are interpreted as in the traditional shift‐share model (though they are derived more accurately) and, in addition, an interaction effect. The results demonstrate that the broad heartland‐hinterland differences in the distribution of population and employment growth are increasing not decreasing and that the hinterland is in fact falling further behind the heartland in employment growth. However the Calgary‐Edmonton corridor and the Lower Mainland of British Columbia are emerging as a western heartland. The population size of cities does affect their rates of employment growth, but so too does their location: the growth of heartland cities is outpacing those in the hinterland. The Appendix provides the equations for two‐variable multifactor partitioning.     

Settlement and settlement continuity in the parish of karlsoey in the middle ages. An analysis based on written sources

Cultural relations in the central Celtic and the Germanic regions during the late LaTene/pre‐Roman iron age have been investigated through a comparison of the fibula material from different sub‐regions. The reliability of results based on occurrence patterns for fibula types has been tested by a direct comparison of the fibulae, without prior type classification. To check the representativity, a detailed analysis has been made of the Northern Germanic region, including also other kinds of artifacts. It appears that cultural relations reflected in similarity of fibulae, dress ornaments and other personal adornments cross the boundaries of the main cultural areas defined through more stable cultural elements, like pottery and burial types and burial customs, while the relations reflected in similar weapons respect these boundaries.     

Calculations and ground-based observations of pulsed proton events in the dayside aurora

A procedure is established to evaluate the Balmer excitation rates of Hα and Hβ to produce the corresponding volume emission rates versus height, using semi-empirical range relations of protons in air. The calculations are carried out with identified ion-energy particle spectra of the dayside aurora obtained by low altitude satellites. The calculated emission intensities of Hα and Hβ indicate that they are indeed observable by ground-based optical detection. Measurements of the dayside aurora from Nordlysstasjonen in Adventdalen, Svalbard, are discussed in relation to these calculations. Periodic bursts of auroral Hα and Hβ emissions are observed in the dayside aurora by ground-based photometers and spectrometers. The mean period between proton events is found to be 10 min on average. Furthermore, it is found that when the time between successive bursts decreases, the emission ratio of Hα and Hβ fluctuates indicating a step-like behaviour in the primary initial proton energy.     

Development plans: New approaches to making frameworks for land use regulation

This paper explores approaches to managing environmental change in urban regions, particularly with respect to land use and property development. Specifically, it examines the role and forms of development plans, as frameworks within regulatory regimes for managing development. It emphasizes the importance of the ideology and discourses underlying conceptions of plan content and function, and of the power relations of executive action. It draws on British experience and past traditions of development plan‐making, to argue that there are three possibilities for the future evolution of a regulatory form for the planning system: neo‐liberal forms of management by performance criteria and output targets; élite‐pluralist forms of management by partnership; and participatory forms of management by argumentation. The paper concludes that the contemporary challenge for the regulatory form of land use planning systems is between forms of technicist management and forms of pluralist democratic management.