The last two decades brought a marked change in the way the border is understood. There was also a revival of discussion about the historical and social context of the border creation and ...functioning, which resulted in opening new theoretical perspectives. The concept of borderscapes is an attempt to complement and enrich the current way of thinking about borders by emphasizing the role of social and cultural aspects of shaping the space around borders. The inspiration for new ideas was both spatial and relational turn taking place in social sciences at the turn of the century. The aim of this article is to present the original way of conceptualizing and testing boundaries labeled as borderscapes. The perspective of borderscape brings a new view on reality and seeks theoretical and empirical possibilities to capture the complex, multidimensional social space that the borders set. This approach attempts to show the border as a dynamic transnational space of relations, discourses and social practices.
In the early 2000s, actors of cross-Channel transport are forced to be involved in border control due to financial pressure from the British Government. Based on fieldwork conducted between 2011 and ...2017 in Calais, this article explores the delegation of border controls to private actors and investigate the use of « discretion » by sailors and trucks drivers in the implementation of these controls. More broadly the article analyzes how the focus on the border work documents the redeployment of State regarding migration controls and the definition of the foreigners.
A provocative account showing that "China"-and its 5,000
years of unified history-is a national myth, created only a century
ago with a political agenda that persists to this day
China's current ...leadership lays claim to a 5,000-year-old
civilization, but "China" as a unified country and people, Bill
Hayton argues, was created far more recently by a small group of
intellectuals. In this compelling account, Hayton shows how China's
present-day geopolitical problems-the fates of Hong Kong, Taiwan,
Tibet, Xinjiang, and the South China Sea-were born in the struggle
to create a modern nation-state. In the late nineteenth and early
twentieth centuries, reformers and revolutionaries adopted foreign
ideas to "invent' a new vision of China. By asserting a particular,
politicized version of the past the government bolstered its claim
to a vast territory stretching from the Pacific to Central Asia.
Ranging across history, nationhood, language, and territory, Hayton
shows how the Republic's reworking of its past not only helped it
to justify its right to rule a century ago-but continues to
motivate and direct policy today.
Despite the industrial significance of grain boundary serration for improving creep resistance and retarding crack propagation, the mechanism of grain boundary serration during hot deformation is ...still unclear. The results of several studies indicated that increased inhomogeneity of the stored energy under high-stress deformation suppressed grain boundary serration. Thus, traditional strain-induced boundary migration, in which the stored energy difference between adjacent grains acts as the driving force for grain boundary serration, must be modified for hot deformation. The experimental results of this study suggested that dissociated grain boundary dislocations from lattice dislocations, rather than the elastic energy of the lattice dislocations, cause the nucleation of serrated grain boundaries. Grain boundary sliding on the serrated grain boundary asymmetrically generated an elastic energy field and an accommodated serrated grain boundary. The presence of an elastic energy field was predicted by dislocation climbing and statically distributed dislocations near the elastic energy field. Since the asymmetrically deformed serrated grain boundary exhibited sub-migration behavior in the elastic energy field, it was concluded that the applied shear stress (applied by grain boundary sliding) on the serrated grain boundary dominated the growth of serrated grain boundaries until dynamic recrystallization occurred.
•Movement of grain boundary dislocations dissociated from lattice dislocations nucleates grain boundary serration.•Elastic strain field generated by Grain boundary sliding acts as driving force for growth of serrated grain boundary.•Formation of low-angle boundary weaken driving force for growth of serrated grain boundary.
The aim of this paper is to prove the existence and uniqueness of classical solutions to a coupled system of three parabolic and one ordinary differential equations, with the latter determined on the ...boundary. This system describes the receptoratoxinaantibody interaction problem taking into account diffusion of reacting species.
In this paper we consider the problem of prescribing the mean curvature on the boundary of the unit ball of RnRn, naY3naY3. Under the assumption that the prescribed function is flat near its critical ...point, we give precise estimates on the losses of the compactness and we provide new existence and multiplicity results of BahriaCoron type.
Arguably more than any other world regions, the area known as Eastern Europe has been defined by its location on the map. Rather than expound on borders and neighbors, Eastern Europe Unmapped raises ...questions about the meaning and relevance of the area's non-contiguous, frequently global or extraterritorial, entanglements.
Borders are more than geographical lines - they impact all our lives, whether it’s the inhumanity of deportations, or a rise in racist attacks in the wake of the EU referendum. Border Nation shows ...how oppressive borders must be resisted. Laying bare the web of media myths that vilify migrants, Leah Cowan dives into the murky waters of corporate profiteering from borders by companies like G4S, and the ramping up of everyday borders through legislation. She looks at their colonial origins, and explores how a draconian approach to border crossings damages our communities. As borders multiply, so too must resistance. From demonstrations inside detention centres to migrant-led campaigns and acts of cross-border solidarity, people are fighting back to stand up for everyone’s freedom to move.
In polycrystalline materials, grain boundaries are sites of enhanced atomic motion, but the complexity of the atomic structures within a grain boundary network makes it difficult to link the ...structure and atomic dynamics. Here, we use a machine learning technique to establish a connection between local structure and dynamics of these materials. Following previous work on bulk glassy materials, we define a purely structural quantity (softness) that captures the propensity of an atom to rearrange. This approach correctly identifies crystalline regions, stacking faults, and twin boundaries as having low likelihood of atomic rearrangements while finding a large variability within high-energy grain boundaries. As has been found in glasses, the probability that atoms of a given softness will rearrange is nearly Arrhenius. This indicates a well-defined energy barrier as well as a well-defined prefactor for the Arrhenius form for atoms of a given softness. The decrease in the prefactor for low-softness atoms indicates that variations in entropy exhibit a dominant influence on the atomic dynamics in grain boundaries.
A symmetric extension method for basis expansion modelling (BEM) under a fast-varying channel is proposed. The conventional DFT BEM approach suffers from power leakage and results in a modelling ...error floor, especially at the channel boundaries. Proposed is a novel symmetric extension method to reduce the leakage power efficiently. Numerical results show that the performance of the proposed channel modelling method is robust under different normalised Doppler frequencies and the modelling errors at the channel boundaries can be eliminated substantially. PUBLICATION ABSTRACT
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