Heat transport at boiling,near‐critical conditions

Two‐phase flow and near‐critical phenomena are likely to enhance energy transport in high‐temperature hydrothermal systems. We present a series of two‐dimensional simulations of two‐phase flow of pure water at near‐critical conditions. The results show that at near‐critical conditions, two‐phase convection can be more efficient in transporting energy than single‐phase convection. The highest heat fluxes are attained when two‐phase heat‐pipes form near the bottom boundary, recharging the root of the upflow zone and thereby enabling the formation of broad upflow regions. When the system becomes more vapor‐dominated, it loses this ability, upflow zones become narrower and the energy efficiency drops to more moderate values.     

Constantius,St Germanus and fifth‐century Britain

The two visits of Germanus to Britain that Constantius included in his Life of the saint were long a staple of insular history. Recently, however, they have come under close scrutiny, leading to the second visit in particular being considered unhistorical. This essay re‐examines the two visits in the context of the whole work, concluding that Constantius had access to good‐quality information for Germanus's activities. Focusing on two episodes of the first visit, Germanus's journey to the cult site of St Alban and the ‘Alleluia Victory’, allows us to explore what the bishop achieved in Britain. Recent suggestions that Germanus effectively ‘invented’ the cult of St Alban arguably go beyond the evidence available, but the bishop's interaction with the cult was an important, planned part of his anti‐Pelagian strategy. The passages describing the two visits are also explored in terms of Constantius's wider purposes in writing the Life. In those terms his investment in stories regarding Germanus in Britain enabled him to develop his hero in ways which accord with his overall vision of an exemplary bishop. Germanus's deeds in Britain, therefore, need to be read both in terms of what they can offer in terms of British history and in the context of this author's wider agenda.     

Rubh’ an Dùnain: a multi‐period maritime landscape on the Isle of Skye,Inner Hebrides,Scotland

A non‐intrusive survey of this headland on Scotland's western seaboard reveals evidence of maritime activity from prehistory until the recent past. The siting of an Iron Age dun appears to have exploited a natural creek to bring boats to a secure landing‐place. Access was enhanced by a cleared channel, and two docks with adjacent nousts constructed. A stone‐revetted canal was later driven to the loch beyond, and quays built on either side of the entry. A 12th‐century boat‐timber was found in the loch. Later the canal was widened, and finally blocked. The sequence of development, and associated dating, merits further research.     

Recent Excavation and Recording at the New Neolithic Rock Art Site of Vallée Aux Noirs,Buthiers (Seine‐et‐Marne,France)

Following the exceptional discovery of Neolithic engravings on a boulder at Vallée aux Noirs in the Fontainebleau forest, south of Paris, an excavation trench was opened in order to access the buried part of the decorated rock panel and explore the stratigraphic context of the artwork. A palaeosol was found two metres below the modern ground level, underneath multiple layers of sterile sandy soil forming a very compact sequence from which only one archaeological artefact was recovered – an Iron Age fibula (c.200–300 BC). Dating of the palaeosol was attempted through two different methods: AMS dates from charcoal suggest a significant span from the Early Bronze Age to the Iron Age, while two more consistent OSL dates point to formation of the palaeosol during the Late Neolithic (3500–3000 cal BC). The entire engraved rock surface (16 m²), including its buried part, was fully recorded. Four main semiotic groups were identified: a typical fifth‐millennium crook‐hafted axe with a ring, two boats with steering oars, and a central, very tall human figure dominating the composition from its 3.5‐metre height.     

Understanding the Southern African ‘Anomaly’: Poverty,Endemic Disease and HIV

The epicentre of the global HIV epidemic is southern Africa. Previous explanations point to migration patterns and highly skewed income distribution, both thought to promote risky sexual behaviour. This study emphasizes the importance of common infectious and parasitic diseases that increase the likelihood of HIV transmission by increasing contagiousness and vulnerability to infection. Using multiple regression analysis on country‐level data, the authors find that socio‐economic variables explain statistically only one‐tenth of the difference in HIV prevalence between southern Africa and other low‐ and middle‐income countries. Measures of five cofactor infections together with the socio‐economic variables, however, explain statistically about two‐thirds of the southern Africa difference in HIV prevalence. They conclude that the relative affluence of countries in southern Africa and historical migration patterns have tended to mask the vulnerability of the majority of their populations who are poor and who have very high prevalence of infectious and parasitic diseases. Those diseases replicate a cycle of poverty that produces biological vulnerability through coinfections. An important implication of this research is that integrating treatment of endemic diseases with other HIV‐prevention policies may be necessary to slow the spread of HIV.     

Fishing Livelihoods,Seashore Tourism,and Industrial Development in Coastal Rio de Janeiro: Conflict,Multi‐Functionality,and Juxtaposition

Critical global political ecology and critical cultural political economy approaches are used in a study involving decades of research to evaluate the changing relationship between fisher livelihoods, seashore tourism, and urban industrial development in an economically dynamic region of coastal Brazil. As the metropolitan area of Rio de Janeiro expanded and encompassed fishing communities, socio‐environmental transformations created threats to fisher ways of life, opened new multi‐functional opportunities, and also introduced unrelated juxtaposed activities. As stocks fell due to overfishing and urban industrial pollution over the last two decades, small‐scale inshore fishing declined in the bay–lagoon systems located to the east and south‐west of Rio de Janeiro. Tourism increased but proved to be a poor substitute for declining fishing activities because it and other new multi‐functional activities rarely aggregated significant value to local livelihoods. Consequently, only a small minority of fishers benefited and remained on the islands and sand spits, while the great majority left for the mainland. New cultural and environmental functions were also absent, so that of the types of multi‐functionality identified by Wilson and Holmes, those present in the study area are weak and basically serve outside urban production and consumption interests.     

Two Early Archaic Shipwrecks at Kekova Adası and Kepçe Burnu,Turkey

During its annual surveys of the Turkish coast in the 1970s and 1980s, the Institute of Nautical Archaeology discovered two early Archaic (7th‐ to early‐6th‐century BC) shipwrecks at Kekova Adas? (Antalya region) and Kepçe Burnu (Mu?la region); Dokuz Eylül University's Institute of Marine Science and Technology is currently involved in survey of the region. The wrecks, marked by a primary cargo of basket‐handle amphoras, indicate exchange between Cyprus and the cities of coastal Asia Minor and Corinth. Such Iron Age internationalism may have been driven by an interest in processed agricultural goods such as olive oil. © 2010 The Authors     

‘If You Can't Pronounce My Name,You Can Just Call Me Pride’: Afro‐German Activism,Gender and Hip Hop

The history of the black German minority, now estimated at around 500,000, goes back several centuries. It is only since the twentieth century, however, that Germans of African descent have been perceived as a group. This did not lead to their recognition as a national minority, but rather, from the 1910s to the 1960s, they were defined as a collective threat to Germany's racial and cultural ‘purity’. When a sense of identity emerged among Afro‐Germans themselves in the 1980s, the majority population continued to deny the existence of ethnic diversity within German society. At the turn of the twenty‐first century, Afro‐Germans seemingly suddenly appeared as a new, ‘hip’ minority. This appearance was largely focused on the immense public success of the Hip Hop collective ‘Brothers Keepers’, conceived as an anti‐racist, explicitly Afro‐German intervention into German debates around national identity and racist violence. This article explains the success of ‘Brothers Keepers’ by contextualising it within the tradition of two decades of Afro‐ German feminist activism and the transnational Hip Hop movement of European youth of colour.     

Inside Hezbollah: The al‐Mahdi Scouts,Education, and Resistance

This article analyzes the al‐Mahdi Scouts, a Lebanese scout group affiliated with Hezbollah. After introducing Hezbollah's social services in Lebanon, the al‐Mahdi Scouts' multifaceted identity and main activities are illustrated. The role in Lebanese society is investigated, along with its cooperation with other scout groups in Lebanon, which takes place mostly within the framework of the Lebanese Scout Federation. I also highlight two controversial issues that emerged in the research. First, it is shown how blurred the distinction is between education and indoctrination. Second, the accusations of terrorism are considered, with two possible approaches identified. The first one looks at Hezbollah as a homogeneous organization, while the second one distinguishes between its military, political, and social wings. While the first approach can legitimately accuse the al‐Mahdi Scouts of terrorism, I argue that the second one is more appropriate because it judges them for their own actions. We cannot just look at this group as Hezbollah's recruitment tool, because its role is more complex and significant. This group provides a portion of Lebanese youth with skills to improve their future and succeed in life, even if it does so by propagating Hezbollah's ideals and beliefs.     

A sacral anomaly from the Quaker Cemetery,Kingston‐upon‐Thames,England

A rare defect of the sacrum was observed in the skeleton of an adult female from the Quaker Cemetery (1663–1814 CE) in Kingston‐upon‐Thames, England. This is an isolated finding in the skeletal collection and no other elements in this individual were similarly affected. After eliminating post‐depositional damage and skeletal asymmetry, a differential diagnosis resulted in the consideration of two conditions: hemivertebra and sacral agenesis, both of which are rare developmental defects that originate during foetal growth. Although the defect is interesting from an embryological, genetic and palaeopathological perspective, it would have resulted in few clinical symptoms for the individual. This case adds to the limited knowledge of the morphological variability of the sacrum, and will aid in future diagnoses of these rare pathological conditions. Copyright © 2009 John Wiley & Sons, Ltd.     

Chemical and Petrographic Analysis of Pre‐Hispanic Pottery from the Southern Abaucán Valley,Catamarca, Argentina

Neutron activation (NAA) and petrographic analyses were carried out on Late and Inca Period pottery from 15 archaeological sites and several clay samples in the southern Abaucán Valley, Catamarca, Argentina. The results from the NAA and petrographic analyses provide new data concerning local versus non‐local pottery production and vessel exchange for these two pre‐Hispanic cultural periods. The chemical data demonstrate the use of different clay sources over time until the Inca appearance in the region, when a more structured and controlled production is observed. Petrographic analyses show a similar change in the ceramic paste recipes used by ancient potters.     

A 16th‐Century Ship‐Find from Amager Beach Park,Denmark: description and preliminary interpretation

When establishing the new Amager Beach Park near Copenhagen, Denmark, a small clinker‐built ship dating to the 16th century (dendro‐dated to 1560–70) was discovered. The Viking Ship Museum in Roskilde excavated the wreck in 2004, and parts of the ship were later taken to the museum and recorded in 3D. This article describes the excavation and the documentation, and presents the preliminary interpretation of the ship‐find. The ship is interpreted as a small cargo vessel, probably carrying two masts. Its hull‐form indicates that the vessel was specially designed for navigating the waters of the Sound between Denmark and Sweden. © 2010 The Author     

“Skilled,Cheap, and Desperate”1: Non‐tenure‐track Faculty and the Delusion of Meritocracy

Over the past 25 or so years, geographers have produced sophisticated critical tools to examine systems like patriarchy, racism, and heteronormativity. However, they have not used those critical tools to examine the problem of institutional hierarchy in the academy. There are many kinds of institutional hierarchy, but the paper focuses on one particular structure: the difference between tenure‐track and non‐tenure‐track faculty. I call for much greater critical reflection on the existence and experience of non‐tenure‐track faculty in geography. I argue that it is essential to undermine the structures and assumed wisdom of the hierarchy, for the sake of non‐tenure‐track faculty, the discipline, and the academy as a whole. Destabilizing the structures requires multiple strategies. I argue that one key strategy is for non‐tenure‐track faculty to tell their stories, to offer their critical perspective from the lower rungs of the hierarchy. The last part of the paper is an autobiographical account designed to give a better idea of how one such story might look.     

Eneolithic Cattle Burials from Aljmaš‐Podunavlje and Osijek‐Retfala,Croatia

Two single bovine burials and one mixed animal burial (containing bovine and canid skeletal remains) have been unearthed at two Baden culture sites, Aljmaš‐Podunavlje and Osijek‐Retfala located in Eastern Croatia. Zooarchaeological analysis attributed the faunal remains to domesticated cattle (Bos taurus) and in one case a dog (Canis familiaris). Almost complete and articulated skeletons of subadult or adult cows were found in all three examined features, while pit 59/60 from Aljmaš also contained a skull belonging to an adult‐domesticated cattle and a skeleton of a very young dog, 2–3 months old. All of the skeletons are well preserved and display no evidence of carcass processing indicating that the animals were buried intentionally. Consideration of the positions in which these animals were interred and their relationship with nearby deposits enables discussion of potential animal burial strategies and possible connections with certain ritual practices in which cows and in one case a dog played important roles. The described burials represent the southernmost known distribution of the rite discussed. Copyright © 2015 John Wiley & Sons, Ltd.     

The Role of Fire Disturbance on Runoff and Erosion Processes – a Long‐Term Approach,Mt. Carmel Case Study,Israel

The Mediterranean ecosystem of Mt. Carmel, Israel, is subjected to an increasing number of forest fires of various extents and severities. The impacts of forest fires on runoff and erosion are widely documented and include increased peak flows and soil loss until the return of a vegetation cover. Most studies, however, treat fire as a single event, whereas the present study is aimed at exploring the long‐term effects of repeated forest fires on eco‐geomorphic processes. The study integrates the results of plot‐based, detailed analysis of post‐fire runoff and erosion with vegetation recovery analysis, at a temporal‐spatial scale which includes the effect of reburning. Our results indicate that forest fires lead to a significant increase in runoff and sediment yields, particularly during the first two years following the disturbance, up to five orders of magnitude higher than from the adjacent unburnt control plots.     

Reactive transport and thermo‐hydro‐mechanical coupling in deep sedimentary basins affected by glaciation cycles: model development,verification, and illustrative example

Deep sedimentary basins are complex systems that over long time scales may be affected by numerous interacting processes including groundwater flow, heat and mass transport, water–rock interactions, and mechanical loads induced by ice sheets. Understanding the interactions among these processes is important for the evaluation of the hydrodynamic and geochemical stability of geological CO₂ disposal sites and is equally relevant to the safety evaluation of deep geologic repositories for nuclear waste. We present a reactive transport formulation coupled to thermo‐hydrodynamic and simplified mechanical processes. The formulation determines solution density and ion activities for ionic strengths ranging from freshwater to dense brines based on solution composition and simultaneously accounts for the hydro‐mechanical effects caused by long‐term surface loading during a glaciation cycle. The formulation was implemented into the existing MIN3P reactive transport code (MIN3P‐THCm) and was used to illustrate the processes occurring in a two‐dimensional cross section of a sedimentary basin subjected to a simplified glaciation scenario consisting of a single cycle of ice‐sheet advance and retreat over a time period of 32 500 years. Although the sedimentary basin simulation is illustrative in nature, it captures the key geological features of deep Paleozoic sedimentary basins in North America, including interbedded sandstones, shales, evaporites, and carbonates in the presence of dense brines. Simulated fluid pressures are shown to increase in low hydraulic conductivity units during ice‐sheet advance due to hydro‐mechanical coupling. During the period of deglaciation, Darcy velocities increase in the shallow aquifers and to a lesser extent in deeper high‐hydraulic conductivity units (e.g., sandstones) as a result of the infiltration of glacial meltwater below the warm‐based ice sheet. Dedolomitization is predicted to be the most widespread geochemical process, focused near the freshwater/brine interface. For the illustrative sedimentary basin, the results suggest a high degree of hydrodynamic and geochemical stability.     

Human remains from a post‐Hellenistic grave‐chamber in Dibba al‐Hisn (Sharjah,UAE)

Human skeletal remains of sixteen individuals found at Dibba al‐Hisn in the Emirate of Sharjah (UAE) are analysed with regard to standard anthropological criteria. They represent the poorly known pre‐Islamic period of the first centuries AD. Remains of at least fifteen individuals were recovered from a semi‐subterranean grave‐chamber together with rich archaeological grave‐goods. An additional, almost complete skeleton was found in the open area near the chamber. While the size and nature of the sample prevent demographic analyses, skeletal features studied with the help of macro‐ and microscopic as well as radiographic methods provide details on individual life histories and living conditions, as well as mortuary habits and taphonomic processes. Of special interest is a case of intentional tooth mutilation as well as two cases of skull trauma apparently caused by violent inter‐personal conflict. The results of the analysis of the faunal remains from the grave‐chamber and its surroundings are presented in an appendix .     

“The Cockroaches of Canada”: French‐Canada,Immigration and Nationalism,Anti‐Catholicism in English‐Canada, 1905–1929

This article examines the central influence of anti‐Catholicism upon English‐Canadian nationalism in the first third of the twentieth century. Anti‐Catholicism provided an existing rhetorical and ideological tradition and framework within which public figures, intellectuals, Protestant church leaders and other Canadians communicated their diverse visions of an ideal Canada. The study of anti‐Catholicism problematises the rigid separation that many scholars have posited between a conservative ethnic nationalism and a progressive civic nationalism. Often times these very civic values were inextricable from a context of Britishness. In addition, anti‐Catholicism was not simply about theological differences between Protestants and Catholics. Instead this theological thread often intersected with the perceived socio‐political problems that Catholics and Catholicism posed. Hostility to Catholicism was not limited only to fraternal organisations such as the Orange Order; indeed the importance of anti‐Catholicism as a component of Canadian nationalism lies in its presence across the political and intellectual spectrum. Catholicism was perceived to inculcate values antithetical to British traditions of freedom and democracy.     

The Spatio‐Temporal Ritual Practice of the Fifty‐Two‐Year Calendar in Mesoamerica

Introducing a new theoretical category in religious studies, “ritual practice of time,” this essay constitutes an analysis about rituals of the structure of space and time of the Aztec fifty‐two‐year calendar in Mesoamerica. Time and space, completed and exhausted at the termination of the fifty‐two‐year cycle, had to be symbolically renewed and recreated in a fifty‐two‐year ritual. Challenging the view held by numerous Mesoamericanists, I demonstrate that the ritual practice of time of the related 365‐day calendar (“New Year ritual”) was not spatio‐temporal in a horizontal quadripartite manner. Given that only one world or cardinal direction of the world was ritually observed, a symbolic re‐enactment of the creation myth could not be executed since it would take four consecutive “New Year rituals” of four years to symbolically define the quadripartite earth. Conversely, the fifty‐two‐year ritual (and the 260‐day ritual) could, in principle, have this very significant meaning and function.