Real diffusion networks are complex and dynamic, since underlying social structures are not only far-reaching beyond a single homogeneous system but also frequently changing with the context of diffusion. Thus, studying topic-related diffusion across multiple social systems is important for a better understanding of such realistic situations. Accordingly, this thesis focuses on uncovering topic...

The growth or dissolution of small gas bubbles (R0<15 microm) by rectified diffusion in nearly saturated liquids, subject to low frequencies (20 kHz<f<100 kHz) and high driving acoustic fields (1 bar<p<5 bars), is investigated theoretically. It is shown that, in such conditions, the rectified diffusion threshold radius merges with the Blake threshold radius, which means that a growing bubble is...

The phenomenon of vibrational resonance (VR) has been investigated in a Rayleigh-Plesset oscillator for gas bubble oscillating an incompressible liquid while driven by dual-frequency force consisting high-frequency, amplitude-modulated, weak, acoustic waves. complex equation the model was expressed as dynamics classical particle potential well Liénard type, thus allowing us to use both numerica...

Through confocal-like microparticle image velocimetry experiments, we reconstruct, for the first time, the three-dimensional flow field structure of the azimuthal fluid recirculation in a sessile drop induced by asymmetric surface acoustic wave radiation, which, in previous two-dimensional planar studies, has been shown to be a powerful mechanism for driving inertial microcentrifugation for mic...

The interaction of targeted drug carriers with epithelial and endothelial barriers in vivo is largely determined by the dynamics of the body fluids. To simulate these conditions in binding assays, a fully biocompatible in vitro model was developed which can accurately mimic a wide range of physiological flow conditions on a thumbnail-format cell-chip. This acoustically-driven microfluidic syste...

An acoustically coupled antenna which can be configured as a transmitting or receiving antenna for coupling between an electrical circuit (transmitter or receiver) and an electromagnetic propagating medium such as the atmosphere. The antenna is a two port device in which one port is connected to the electrical circuit and the second port includes a transducer which interfaces (radiates or recei...

Despite many acoustic, articulatory and phonological studies of Advanced Tongue Root (ATR) vowel contrasts harmony, the perception ATR by speakers languages with distinctions are lacking. This paper explores how vowels which differ for or height, both, distinguished Akan, a Kwa language Ghana. We examine whether contrastive status impacts it is driven acoustic similarity. Results from two exper...

We use a simple model to study the long time fluctuations induced by random pinning on the motion of driven non– interacting vortices. We find that vortex motion seen from the co–moving frame is diffusive and anisotropic, with velocity dependent diffusion constants. Longitudinal and transverse diffusion constants cross at a characteristic velocity where diffusion is isotropic. The diffusion fro...