Growth of magnetic cobalt/chromium nano-arrays by atom-optical lithography

Contains fulltext : 91870.pdf (publisher's version ) (Open Access

Strong self- and cross-phase modulation effects in chromium-doped KTiOPO4 crystals

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Quasiperiodic structures via atom-optical nanofabrication

Contains fulltext : 57910.pdf (publisher's version ) (Open Access)We deposit a laser-collimated chromium beam onto a substrate through a quasiperiodic laser standing-wave (SW) tuned above the atomic resonance at the Cr-52 transition S-7(3)-->P-7(4)o at 425.55 nm. This SW is created by interference of five laser beams crossing in one point at mutual angles of 72degrees. The resulting chromium pattern on the substrate surface mimics the geometry of the SW and it is thus itself quasiperiodic. On a surface area of 0.2x0.2 mm(2) the spatial Fourier spectrum of the measured patterns is decagonal. Besides being of fundamental interest, this quasiperiodic nanofabrication via atom optics can find its applications in photonics

To draw or to cross the line? The landscape architect as boundary spanner in Dutch river management

In many Western countries, flood policy is transitioning from a focus on technical flood defence measures towardsmore holistic and integrated flood risk management approaches. In this article, we explore the boundaryspanning role of landscape architects in integrated flood risk management projects. The central research questionis: what are the boundary spanning activities and roles that landscape architects perform and which factorsare conditional to these activities? We have studied the boundary spanning behaviour of landscape architects inthe Dutch ‘Room for the River’ programme. This programme had a dual objective of improving simultaneouslythe water safety and the spatial quality of the Dutch riverine areas. We conducted a comparative, in-depth casestudy of three ‘Room for the River’ projects, and investigated conditions that stimulated or frustrated the work oflandscape architects in establishing safe solutions with spatial quality. We found that the landscape architectsinvolved in these projects played various boundary spanning roles. We conclude that, depending on the conditionalfactors, their roles ranged from more traditional content-oriented domain expert/scout to the moreinnovative organisational expert/task coordinator. For successful boundary spanning, although cognitive capacities(e.g., knowledge about landscape) are important, landscape architects also need to have the appropriatesocial capacities (e.g., social-emotional competences, networking skills). That is, the work of the landscapearchitects essentially includes drawing lines that sketch the contours of future landscapes; but to do so, they mustalso cross the lines between the various actors, organizations, and disciplines involved

To draw or to cross the line? The landscape architect as boundary spanner in Dutch river management

In many Western countries, flood policy is transitioning from a focus on technical flood defence measures towardsmore holistic and integrated flood risk management approaches. In this article, we explore the boundaryspanning role of landscape architects in integrated flood risk management projects. The central research questionis: what are the boundary spanning activities and roles that landscape architects perform and which factorsare conditional to these activities? We have studied the boundary spanning behaviour of landscape architects inthe Dutch ‘Room for the River’ programme. This programme had a dual objective of improving simultaneouslythe water safety and the spatial quality of the Dutch riverine areas. We conducted a comparative, in-depth casestudy of three ‘Room for the River’ projects, and investigated conditions that stimulated or frustrated the work oflandscape architects in establishing safe solutions with spatial quality. We found that the landscape architectsinvolved in these projects played various boundary spanning roles. We conclude that, depending on the conditionalfactors, their roles ranged from more traditional content-oriented domain expert/scout to the moreinnovative organisational expert/task coordinator. For successful boundary spanning, although cognitive capacities(e.g., knowledge about landscape) are important, landscape architects also need to have the appropriatesocial capacities (e.g., social-emotional competences, networking skills). That is, the work of the landscapearchitects essentially includes drawing lines that sketch the contours of future landscapes; but to do so, they mustalso cross the lines between the various actors, organizations, and disciplines involved