11 research outputs found

    Use of magnetic resonance image registration to estimate displacement in the human earcanal due to the insertion of in-ear devices

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    International audienceIn-ear devices are used in a wide range of applications for which the device's usability and/or efficiency is strongly related to comfort aspects that are influenced by the mechanical interaction between the device and the walls of the earcanal. Although the displacement of the earcanal walls due to the insertion of the device is an important characteristic of this interaction, existing studies on this subject are very limited. This paper proposes a method to estimate this displacement in vivo using a registration technique on magnetic resonance images. The amplitude, the location and the direction of the earcanal wall displacement are computed for four types of earplugs used by one participant. These displacements give indications on how each earplug deforms the earcanal for one specific earcanal geometry and one specific earplug insertion. Although the displacement due to a specific earplug family cannot be generalized using the results of this paper, the latter help to understand where, how much, and how each studied earplug deforms the earcanal of the participant. This method is revealed as a promising tool to investigate further acoustical and physical comfort aspects of in-ear devices

    Catching-up trajectories in the wine sector: a comparative study of Chile, Italy and South Africa.

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    From a development perspective an investigation of the changes that have occurred in the wine industry is of particular interest because it provides evidence on how emerging economies have been able to acquire significant shares of the international market in a dynamic sector. Based on novel empirical evidence, this paper shows that emerging countries with diverse institutional models and innovation strategies have actively participated in the process of technological modernization and product standardization. These newcomers in the wine sector have responded particularly effectively to changes in demand, aligning emerging scientific approaches with institutional building efforts and successful marketing strategies
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