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Diameter-dependent growth rate of InAs nanowires

We have grown Au seeded InAs nanowires using chemical beam epitaxy and report on the growth rate dependence on nanowire diameter. We find a maximum of the growth rate at a nanowire diameter of 25 nm, below which the growth rate decreases due to the Gibbs-Thomson effect. Above the maximum, the growth rate decreases with increasing diameter due to the effect of material diffusion to the growth point

The Bremmer series for a multi-dimensional acoustic scattering problem

The Bremmer series is used to reduce a complex scattering problem to a sequence of simpler single scattering problems. In the Bremmer series, the wave equation is first decomposed into a coupled system of one-way wave equations. The system is then decoupled into a sequence of one-way wave equations with a fixed point iteration. In this paper, a left symbol representation of the decomposition opera

Rudolf Kjellén: Nordic biopolitics before the welfare state

This article aims to contribute to the history of biopolitical thought through a more accurate understanding of the Swedish professor of political science Rudolf Kjellén considered both in his historical and political context. Kjellén coined the term ‘biopolitics’, as early as 1905, in a two-volume work entitled The Great Powers, and developed it even further in a 1916 book entitled The State as a

Steady-State Diffusion in Complex Amphiphilic Films

The relation between structure and diffusive transport at steady-state is investigated theoretically for amphiphilic systems. Amphiphilic systems typically show a large response to moderate changes in control parameters, such as temperature, osmotic pressure, and the presence of cosolvents and cosolutes. Such systems is therefore expected to show a local response in structure due to the transport

Stability Analysis of Continuous-Time Adaptive Control Systems

The stability properties of a fairly general continuous-time adaptive control scheme are analyzed. Sufficient conditions for $L^\infty $-stability in the presence of disturbances are given. The stability results are used to prove convergence of the process outputs in the disturbance-free case, without requiring any a priori stability assumptions.