What determines the intensity of magnetospheric substorms?

One of the central issues in substorm research is what determines the substorm intensity. Through an introduction on what constitutes a magnetospheric substorm, we discuss several parameters which are available to measure the substorm intensity. In terms of ionospheric quantities, we have the auroral electroject indices, the total current in the westward auroral electrojet, the area of bright aurora, the maximum poleward advance of the auroral bulge, and the duration of auroral substorm activities. In terms of magnetospheric quantities, we have the innermost location of the substorm injection boundary and the amount of current reduction in the cross-tail current within the substorm current wedge. A measure reflecting substorm activities in both the ionosphere and the magnetosphere is the total substorm energy dissipation but its drawback lies in the difficulty of assessing it accurately if the energy loss due to plasmoids is to be included. We also discuss the predictability of substorm intensity, which leads us to the issue of whether a substorm is a directly-driven or an unloading process. The recent success in predicting the auroral electrojet index from solar wind parameters with a cross-correlation of ~ 0.9 suggests that substorm activities over a long time scale are primarily directly-driven while those over a short time scale are governed by impulsive unloading processes. This understanding allows us to reconcile the apparently conflicting dual nature of magnetospheric substorms.     

What determines the latitudinal extent of the auroral acceleration region?

Characteristic scales associated with auroral precipitation are investigated on the basis of quasistatic magnetotail models, resistive MHD simulations of magnetotail dynamics, and a general relation between parallel electric fields and velocity shear. Since the inverted-V precipitation region of discrete auroras (on the dusk side) is associated with upward flowing, region 1, currents, we investigate the distribution of these currents first. The overall distribution of region 1 type field-aligned currents and their dynamic changes can be explained by characteristic scales in the magnetotail and their mapping to the ionosphere. The quiet time region 1 currents are associated with the decrease of tail flaring. Their overall extent in the north-south direction is closely related to the scale height of the cross-tail current. Dynamic region 1 currents are related to the velocity shear of earthward flow, which can be generated by a tail instability. In that case the peaks of the enhanced region 1 currents are found to map closer to midnight and to lower latitudes than the quiet region 1 currents, consistent with average observations [Iijima and Potemra (1976a), J. geophys. Res.81, 2165]. On the basis of a general relation between parallel electric fields and ‘slippage’ in the plasma transport [Hesse and Schindler (1988), J. geophys. Res.93, 5559; Schindleret al. (1991), Astrophys. J.380, 293], we make estimates of the spatial extent of nonideal regions, where parallel electric fields may exist. For a plausible model of substorm reconfiguration, we find a latitudinal extent of about 7 km for a time scale of 1 min and a integrated parallel electric field of 5 kV. The length scale is proportional to the time scale. The sign of this parallel electric field is consistent with downward acceleration of electrons on the dusk side. The spatial extent of the parallel electric field region is independent of the microscopic generation mechanism if the time scale and the characteristic parallel potential difference (i.e. the integrated parallel electric field) are independent of this mechanism.     

What was the Prevalence of Malignant Disease in the Past?

A method is described which can be used to calculate the number of tumours that might be expected to occur in a group of skeletons. The method of calculation is based on published data that relate to the frequency with which various primary tumours metastasize to bone and on the number of deaths from malignant disease at the turn of the century. The method has been applied to one archaeological site and the results indicate that the number of tumours found—although very small—is within the limits suggested by the model.     

What can the concept of friendship contribute to the study of national identity?

ABSTRACT. This article argues that understanding national identity requires a reappraisal of friendship as a political sentiment. Although studies of nationalism underscored the transformation of face‐to‐face interactions into ties between ‘distant others,’ they failed to acknowledge how sentiments of friendship may be involved. First, following theorising in political philosophy, the Aristotelian paradigm of civic friendship is conceptually applicable to modern civil society based on characteristics such as volition, commitment and sentiment. Second, feminist scholarship has delineated how an implicit discourse of male fraternity underlies the historical realisations of the modern social contract and mediates the notions of both patriotism and nationalism. Finally, networks of male associations and transformations in collective affection from small settings to large‐scale societies contributed to the magnification of a politics of friendship. Consequently, rather than viewing fraternal friendship as a relic of traditional societies, it should be studied as a unique aspect of modern nationalism.     

What Sort of Geographical Education for the Anthropocene?

As the Anthropocene concept gains in prominence, there is opportunity to explore it as a social and cultural process, not merely as a matter of scientific definition and debate. This paper seeks to sketch some of the social dimensions of the Anthropocene, in terms of anxiety about the human future, about risk, and about environmental limits. It considers how the term encapsulates a prophetic sense of concern and unease about people's place in nature, the very thing that the embrace of industrial capitalism was supposed to remove. It then explores four open‐ended attributes of a geographical education for the Anthropocene. These are: first, engaging critically with digital technologies; second, countering grand narratives with local encounters; third, setting hope alongside gloom; and fourth, remembering the past as well as the future. The purpose of such attributes is to prepare students for creative encounters with the uncertainties of the Anthropocene. The implications for educational practice are then considered, including the role of active and community‐based learning strategies within a university conceived of as a place of classrooms without borders.     

What Happened at the First Meeting of the World Archaeological Congress Committee of Ethics?

Herrera reflects on the committee’s deliberations in how to approach developing a framework for ethics in tune with the aims and ethos of WAC. He points out the importance of a foundation of meaningful principles, embedded in the thread of the actions of individuals acting in specific cultural and historical social contexts and based on core values that at the same time acknowledge the contradictions inherent in diverse standpoints. The committee faces major questions of how to define social justice and appropriate ethical behaviour for people and institutions embedded in different social and historical contexts across the globe.     

What kind of region reaps the benefits of a currency union?

What is the economic impact of joining a currency union? Is this impact heterogeneous across regions? And how does it change in case of a recession? We answer these questions by investigating the economic impact of joining the euro area for the latecomers, that is, the eastern European countries that adopted the euro after 2002. Differently from previous literature, we use NUTS-2 regions as units of analysis. This novelty allows us to investigate the theoretical predictions of a currency union impact at a more appropriate geographical level. Using a recently developed counterfactual approach, we estimate the overall as well as the disaggregated impact of joining the euro area. We find that the adoption of the euro brought about a small positive effect, which was, however, dampened by the Great Recession. Individual regional estimates suggest heterogeneous returns with benefits accruing mostly to core regions.     

Was He Murdered Or Was He Not?—Part I: Analyses of Mercury in the Remains of Tycho Brahe

World‐renowned Renaissance astronomer Tycho Brahe died on 24 October 1601, after 11 days of illness. Several conspiracy theories regarding his death have been aired, the first shortly after his death by William Shakespeare in the play Hamlet, published in 1603. A key factor in the still lively debate is whether he was administered mercury—as medicine by his own hand, or as poison by an unfriendly hand. In 2010, Brahe's grave was reopened and samples of his bones, hair, teeth and the textiles were procured and analysed. Here, we present evidence that Brahe was not administered lethal doses of mercury.     

What Is the State? The Russian Concept of Gosudarstvo in the European Context

What allows us to talk about the state as an active agent when we understand that only individuals act? This article draws comparisons between Quentin Skinner's exposition of the history of the concept of the state in major European languages and the history of its equivalent Russian term gosudarstvo in order to provide some general hypotheses on the development of the phenomenon of the state, and on the origins of this baffling usage. First, summing up a vast number of historical and lexicographical works, it attempts a detailed reconstruction of the conceptual development of the term in the Russian language. Second, a peculiarity of the Russian case is discussed, in whichabsolutist thinkers (and not republicans, as in western Europe) stressed the difference between the person of the ruler and the state. Third, political interests in introducing such novel usage are discussed, together with the role of this usage in the formation of the state. This allows us to see better the origins of current faith in the existence of the state as a more or less clearly designated and independent actor, predicated on the mechanism of what Pierre Bourdieu described as “mysterious delegation.”     

What Has the Geography of Sleeping Arrangements Got to Do with the Geography of Our Teaching Spaces?

As geographers we are used to researching and teaching about those other than ourselves and it is timely to turn our gaze on the social and spatial practices of our own teaching spaces. One particular teaching space is the overnight geography field trip, a context in which geography fieldwork is ostensibly the main focus for two or more consecutive days. Teaching spaces such as classrooms and field trips, like all social spaces, are imbued with spoken and unspoken assumptions about sexuality, gender and 'race'. Geography field trips are one site in which to examine how social space is constituted via spoken and unspoken assumptions and how these assumptions shape field trip participants' understandings of themselves within these spaces. Simultaneously, field trips offer a site for the consideration of the socio-spatial relations of the reproduction of contemporary geographic knowledge. This article is one response to what Jon Binnie identified as an urgent need for geographers to understand how geography is being taught. Although sleeping arrangements are 'not formally notified' as part of fieldwork activity, the author demonstrates how sleeping arrangements conveyed important messages about sexuality, gender and cultural practices during seven overnight field trips held by two universities and two high schools in New Zealand. The concern is how apparently mundane arrangements such as the organisation of sleeping might reveal the ongoing hegemonic social and spatial relations of teaching and learning geography, as these are shaped by sexuality, gender and 'race', so that we might be better informed to challenge and change these practices.     

What voice for the people? categorising methods of public consultation

Governmental institutions increasingly use consultation procedures in an attempt to augment legitimacy and improve the quality of democratic decision making. However, there has been little systematic academic consideration of the ways in which the different consultation methods relate to democratic decision making. This article examines who is invited to participate in the consultative procedures and the role they are expected to play. Differences between the general public, community of fate and associations or groups are discussed, as are the methods of deciding which person will speak for the group. Three different roles of group representatives are discussed: information provision, contestation, and synthesis. The conclusions are illustrated in a matrix which allows a closer consideration of consultation procedures in relation to various aspects of democracy.     

What Happened in Neiden? On the Question of Reburial Ethics

The Neiden Case reburial from Finnmark, North Norway, marks the closure of a process initiated with a controversial excavation in 1915 when 94 skeletons were brought to University in Oslo. The skeletons formed part of a monumental work in physical anthropology by the Norwegian anatomist Karl Emil Schreiner concluding that the Sámi belonged to a somewhat infantile proto-Mongolian race. There is little doubt about unethical aspects of the excavation as well as the exceedingly dubious character of racial research on the Sámi prior to the Second World War. However, considering the handling of the case, opposing facts and opinions, lack of knowledge and other uncertainties, ethical implications seem far from obvious. With regard to the dead themselves the reburial may even be considered unethical. This paper emphasizes the complexity of the ethics of reburials with particular attention to the dead, their graves and belongings.