How TNC subsidiaries shine in world cities: policy implications of autonomy and network connections

The study examines the relationship between performance and patterns of autonomy and the network relationships used by the foreign subsidiaries of transnational corporations (TNCs) in world cities compared to those subsidiaries outside these locations. This is done by exploring if these patterns differ in foreign subsidiaries in Greater Copenhagen compared to elsewhere in Demark. The findings reveal that there are important differences in the relationships between performance and the autonomy and network structures in foreign subsidiaries. These findings are discussed and policy implications distilled. The study finds that the scope of inward foreign direct investment (FDI) policy could be usefully extended to encompass urban development thereby helping cities develop assets, institutional support and infrastructure that can enhance agglomeration benefits and global connectivity. The findings indicate policies, aimed at helping subsidiaries embed in host location networks and incorporate these networks into other parts of the parent company, could be beneficial. The paper also discusses economic and social inequality that can stem from network patterns and the inclination of subsidiaries to operate autonomously in world cities. It proposes policy options that can lead subsidiaries to undertake high-value activities and innovation in world cities

The hot pick-up technique for batch assembly of van der Waals heterostructures

The assembly of individual two-dimensional materials into van der Waals heterostructures enables the construction of layered three-dimensional materials with desirable electronic and optical properties. A core problem in the fabrication of these structures is the formation of clean interfaces between the individual two-dimensional materials which would affect device performance. We present here a technique for the rapid batch fabrication of van der Waals heterostructures, demonstrated by the controlled production of 22 mono-, bi- and trilayer graphene stacks encapsulated in hexagonal boron nitride with close to 100% yield. For the monolayer devices we found semiclassical mean free paths up to 0.9 micrometer, with the narrowest samples showing clear indications of the transport being affected by boundary scattering. The presented method readily lends itself to fabrication of van der Waals heterostructures in both ambient and controlled atmospheres, while the ability to assemble pre-patterned layers paves the way for complex three-dimensional architectures.Comment: 32 pages, 6 figures, 34 references, 14 supplementary figure

The impact of autonomy and organisational relationships on subsidiary employment of skilled labour

The paper develops a conceptual model on relationship between the strategic development of subsidiaries, in developed economies, and the development of higher valued operations that leads to increased employment of skilled labour. A concept of effective autonomy is developed in the paper. Effective autonomy is conceived as the ability of the subsidiary to implement and finance its desired increase in skilled labour. The interrelated effects between effective autonomy and intra and inter organisational relationships and employment of skilled labour are found to be uncertain because effective autonomy can be supportive of the development of intra and inter organisational relationships that requires a higher proportion of skilled labour, but effective autonomy can lead to deterioration in intra-organisational relationships thereby leading to a more peripheral role played by the subsidiary thus lowering the need for skilled employment. The conceptual model is based on changes in effective autonomy and intra and inter organisational relationships and is therefore set in the context of the evolution of the development of subsidiaries

Quantitative optical mapping of two-dimensional materials

The pace of two-dimensional materials (2DM) research has been greatly accelerated by the ability to identify exfoliated thicknesses down to a monolayer from their optical contrast. Since this process requires time-consuming and error-prone manual assignment to avoid false-positives from image features with similar contrast, efforts towards fast and reliable automated assignments schemes is essential. We show that by modelling the expected 2DM contrast in digitally captured images, we can automatically identify candidate regions of 2DM. More importantly, we show a computationally-light machine vision strategy for eliminating false-positives from this set of 2DM candidates through the combined use of binary thresholding, opening and closing filters, and shape-analysis from edge detection. Calculation of data pyramids for arbitrarily high-resolution optical coverage maps of two-dimensional materials produced in this way allows the real-time presentation and processing of this image data in a zoomable interface, enabling large datasets to be explored and analysed with ease. The result is that a standard optical microscope with CCD camera can be used as an analysis tool able to accurately determine the coverage, residue/contamination concentration, and layer number for a wide range of presented 2DMs

Conductance quantization suppression in the quantum Hall regime

Conductance quantization is the hallmark of non-interacting confined systems. The authors show that the quantization in graphene nanoconstrictions with low edge disorder is suppressed in the quantum Hall regime. This is explained by the addition of new conductance channels due to electrostatic screening