Friction Reduction through Ultrasonic Vibration Part 1: Modelling Intermittent Contact.

Ultrasonic vibration is employed to modify the friction of a finger pad in way that induces haptic sensations. A combination of intermittent contact and squeeze film levitation has been previously proposed as the most probable mechanism. In this paper, in order to understand the underlying principles that govern friction modulation by intermittent contact, numerical models based on finite element (FE) analysis and also a spring-Coulombic slider are developed.

Development of a finite element model of a finger pad for biomechanics of human tactile sensations.

The aim of ongoing research is to develop a multi-scale multi-physics computational framework for modelling of human touch in order to provide understanding of fundamental biophysical mechanisms responsible for tactile sensation. The paper presents the development of a macro-scale global finite element model of the finger pad and calibration of applied material models against experimental results using inverse method. The developed macro model serves as a basis for down-scaling to micro finite element models of mechanoreceptors and further implementations and applications as a virtual tool in scientific or industrial applications related to neuroscience, haptics, prosthetics, virtual touch and packaging.

A universal approach for promoter strength evaluation supported by the web-based tool PromCal.

In genetic engineering, gene expression is often modulated by replacements in promoter regions. Any deliberate intervention into the regulatory elements requires a subsequent evaluation based on analysis of reporter proteins. We have developed a new and rapid approach for characterization of promoter activity in which promoter strengths are determined by antibiotic resistance level.