 Latching MEMS angular positioning stages have been constructed by deep reactive ion etching and undercut of bonded silicon-on-insulator. Rotation is powered by a primary linear drive acting on a tangential drive pin attached to a passive stage. The approach is extensible to other tilt axes using inserted components. The linear stage is driven by buckling electrothermal actuators. Latching is ...

Tilt-table testing for patients with unexplained syncope was first described in 1986 by Kenny et al. (1) and later by Almquist et al in the U.S. (2). The tilt protocols proposed differed, with the Westminster Protocol favoring prolonged passive tilt alone (1,3) and the Minneapolis Protocol routinely using isoproterenol provocation (2). Although there is now widespread acceptance of tilt testing...

BACKGROUND AND PURPOSE Alterations in the central autonomic network are hypothesized to play a role in the pathophysiologic mechanism underlying neurocardiogenic syncope; however, few data are available regarding the structural changes of the brain in this condition. We used voxel-based morphometry and regional volumetry to identify possible neuroanatomic correlates. MATERIALS AND METHODS We ...

It has recently been shown that a Hagedorn phase of string gas cosmology may provide a causal mechanism for generating a nearly scale-invariant spectrum of scalar metric fluctuations, without the need for an intervening period of de Sitter expansion. A distinctive signature of this structure formation scenario would be a slight blue tilt of the spectrum of gravitational waves. In this paper we ...

A brief survey of authentication methods in password-protected systems is first provided. Subsequently, features of a freely available software for cracking passwords is then discussed. A randomised procedure for attacking passwords, based on a tilted version of the password distribution, is then proposed. This tilt is a mechanism suggested by large deviations theory. After showing the asymptot...

Recent simulations have indicated that the traditional Helfrich-Canham model for topographical fluctuations in fluid phase biomembranes should be enriched to include molecular tilt. Experimental evidence supporting the aforementioned enrichment is reported. The current work is a tilt-dependent analysis of the X-ray scattering from oriented stacks of fluid phase lipid bilayers. By analyzing seve...

OBJECTIVES Tilt perception is part of the perception of spatial orientation. It is determined not only by the allocentric gravity axis, but also by a second allocentric axis induced by visual information as well as by the egocentric body (head) axis induced by somatosensory information. The aim of this study was to quantify roll-tilt perception using the subjective visual vertical (SVV) and the...

This thesis includes the results of a PhD study about methods to compare Sonic Detection And Ranging (SODAR) measurements to measurements from other instruments. The study focuses on theoretical analysis, the design of a transponder system for simulating winds and the measurement of the acoustic radiation patterns of SODARs. These methods are integrated to reduce uncertainty in SODAR measuremen...

conclusions this study did not show that distal radius anatomical indices including the radial height, radial inclination, ulnar variance and volar tilt influence perilunate fracture dislocation as risk factors. background distal radius radiographic indices may play a role as risk factors in pathogenesis of kienbock’s disease, scaphoid fracture and non:union:. perilunate fracture dislocations a...