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Scaling of the density of state of the weighted Laplacian in the presence of fractal boundaries

Spectral properties of the weighted Laplace operator in the presence of fractal boundaries are numerically investigated for both Neumann and Dirichlet boundary conditions. This corresponds to the characterization of heat and mass transport in microchannels with irregular and rough surfaces induced by the microfabrication process. The axial velocity field with no-slip boundary conditions, represent

On the modelling of time-interleaved sequential lamination micromixers

We develop a novel and simple theoretical model of time-interleaved sequential lamination micromixers that improves the model proposed by Nguyen and coworkers (Microfluid Nanofluid 1:373-375, 2005a, Lab Chip 5:1320-1326, b, J Phys Conf Ser 34:136-141, 2006) based on the Taylor-Aris dispersion theory. The Nguyen model takes into account the non uniform structure of the velocity profile through an e

Steady-state performance of an infinitely fast reaction in a three-dimensional open Stokes flow

We investigate the steady-state performance of a single irreversible mixing-controlled reaction between segregated reactant streams entering the annular gap between coaxial cylinders that can rotate independently. The three-dimensional Stokes flow results from the superposition of a pressure-driven Poiseuille flow along the mixer axis, and a cross-sectional Couette flow generated by the steady rot

Optimal design of silicon-based chips for piezo-induced ultrasound resonances in embedded microchannels

We present a variational formulation of the governing equations and introduce global indicators to describe the behavior of acoustofluidic devices driven at resonance frequencies by means of a piezoelectric transducer. The individuation of the correct Lagrangian densities for the different parts constituting the device (the piezo transducer, the silicon walls, the fluid-filled microchannel, and th

Short-time behavior of advecting-diffusing scalar fields in Stokes flows

This article addresses the short-term decay of advecting-diffusing scalar fields in Stokes flows. The analysis is developed in two main subparts. In the first part, we present an analytic approach for a class of simple flow systems expressed mathematically by the one-dimensional advection-diffusion equation w(y)∂ξ=É∂y2+iV(y)-É′, where ξ is either time or axial coordinate and iV(y) an imaginary pot

Translating public diplomacy and nation branding in Scandinavia : An institutional approach to the Cartoon Crises

Nation branding has been criticised for leading to the homogenisation and depoliticisation of national interest and identity. This study examines the politics of nation branding in relation to its configuration with public diplomacy and the institutional policy context in which they are embedded. Informed by Scandinavian institutionalism and the analytical concept of translation, the study reveals

Can two wrongs make it right? Reconsidering minimum resale price maintenance in the light of Allianz Hungaria

Minimum resale price maintenance (RPM) agreements constitute hard-core vertical restraints and are treated as object restrictions in EU competition law. This article suggests that the time may have come where this approach is revised. After, first, discussing the economic theory behind RPM and the EU court's approach to object restrictions, it argues that the recent widening of the object analysis

The Sky is the Limit: On the Drafting of Article 11 TFEU’s Integration Obligation and its Intended Reach

The paper analyses the historical development of Article 11 TFEU’s integration obligation and the intentions of Member States when adopting the various amendments to answer the question whether Article 11 TFEU applies across the board or only to certain specific areas of competences. The paper focuses in particular on the amendments of the Amsterdam and Maastricht Treaty as the most important chan

Textual objects and strategizing : The influence of documents as active objects on strategic recursiveness

In this paper, we explore the role of documents as influential objectsin strategizing, especially in terms of how they influence strategicrecursiveness. We do not restrict our study to explicitly strategyrelateddocuments (e.g. strategic plans and vision or missionstatements), but include all documents that generally address acompany’s long-term direction. By applying the notions ofauthoritative te

Magnetomotive ultrasound for nanomedicine : a mechanistic approach to detection, evaluation and safety assessment

Cancer is one of the leading causes of death worldwide, but reliable diagnosis and staging can contribute to optimal treatment planning, and is a crucial factor in reducing mortality and maintaining quality of life. Soft tissue mechanical properties are promising indicators of cancer that can be assessed non-invasively using functional imaging. Additionally, lymphatic involvement is considered a k

Collective decision skill and decisive voting games

The paper discusses various representations of collective decisional skill which are useful in the evaluation of decision structures. The recursion formulas we give here and the use of the concepts of majority deficiency as well as majority and unanimity games present expedient approaches in analyzing collective competence. Using the simple majority system as benchmark, applications to certain hie