Measurements of pressure in oscillating rigid replicas of vocal folds are presented. The pressure upstream of the replica is used as input to various theoretical approximations to predict the pressure within the glottis. As the vocal folds collide the classical quasisteady boundary layer theory fails. It appears however that for physiologically reasonable shapes of the replicas, viscous effects...

This paper presents recent progress in research examining the mechanisms of voice generation and a method for physiologically-based speech synthesis. The overarching goal of this research is the precise modeling of interactions among physical systems involved in the processes underlying voice generation. The interaction between the voice generation system (glottal flow and the vocal folds) and ...

We study the stability of passive motion of a fish model. The (articulated body) fish model accounts for the finite dimensions of the fish, its bending stiffness (via the torsional springs at the joints), the unsteadiness of the flow (via the added mass effect) but it does not take into consideration vortex shedding from the trailing edge of the fish. The stability analysis shows that there is ...

SECTION 1 A 20-year-old healthy woman developed suddenonset, fluctuating gait unsteadiness. She became progressively confused over a 2-week time period and was sent home after she was found wandering the halls of her college dormitory. Her parents noted personality changes and slowed thinking. Several days later she developed a left facial droop and left-sided arm and leg weakness, prompting ev...

Methods. Consecutive neck pain patients over the age of 18 were recruited from the outpatient clinic at the AECC at the time of their initial consultation. Patients were excluded if they had radiographic evidence of congenital anomalies, fracture/dislocation, inflammatory, infectious or other serious pathologies. Patients were asked to answer questions regarding demographics, history of injury/...

Mal de debarquement, or "land sickness," is a transient sensation of tumbling, swinging, unsteadiness, and disequilibrium reported by passengers and crew after returning to land from long sea voyages. Although mal de debarquement is mentioned in classic texts on seasickness,' 2 there are no specific studies concerning the nature and extent of this phenomenon. A computer search of the literature...

A 39-year-old male presented with slurred speech, left hand weakness, gait unsteadiness and headaches over a period of 4 weeks. A brain MRI revealed a right motor strip lesion with Wallerian degeneration along the pyramidal tract plus brain stem and cerebellar FLAIR changes without enhancement ( fig. 1 ). Laboratory findings included a CD4 count of 56, HIV viral load of 2,597 and a positive CSF...

Forcing a cylinder in the streamwise direction with frequency much lower than stationary shedding significantly alters wake dynamics. During certain portions of forcing cycle resembles that cylinder, while others it exhibits strong unsteadiness. Although range flow phenomena are observed, is shown novel time scaling framework can be used to relate forced and unforced systems.