STUDY DESIGN Laboratory experiment. OBJECTIVE To compare the efficacy of different head immobilization techniques during motion simulating ambulance transport. BACKGROUND A significant number of neurologic injuries associated with cervical spine fractures arise or are aggravated during emergency extrication or patient transport. Previous studies have not addressed the effect of head immobil...

In this article, a new combined adaptive method is used for a two-link robot. One of the advantages of proposed controller is that it does not depend on the exact parameters such as joints weight. Also the controller can reach itself to real parameters. In many applications of robots in industry the weight and moment of inertia are changed intentionally and it would not be an easy task for the ...

The use of fusel oil as an 'alternative' carbon source for denitrification in the mainstream and sidestream treatment processes was studied. Research comprised two kinds of batch experiments as well as acclimation of process biomass to external carbon sources. In the conventional nitrate utilization rate (NUR) measurements (one-phase experiments with non-acclimated biomass), the NUR with fusel ...

Bioinspired robotic structures comprising soft actuation units have attracted increasing research interest. Taking advantage of its inherent compliance, soft robots can assure safe interaction with external environments, provided that precise and effective manipulation could be achieved. Endoscopy is a typical application. However, previous model-based control approaches often require simplifie...

Nonlinear H∞ control is considered for uncertain nonholonomic systems with external disturbances in their chained form kinematic models. State feedback controllers are explicitly constructed to guarantee an L2 gain performance from the disturbance to the system output. Without the presence of the disturbance, the system states are regulated to the origin. Recent results in robust and adaptive c...

Various four-mirror optical resonators are studied from the perspective of realizing passive stacking cavities. A comparative study of the mechanical stability is provided. The polarization properties of the cavity eigenmodes are described, and it is shown that the effect of mirror misalignments (or motions) induces polarization and stacking power instabilities. These instabilities increase wit...

This article describes the use of the ITI implant system in rehabilitation of the maxillary anterior sextant of a 41-year-old patient. The Syn-Octa TS abutment system was used in this case, along with a customized transfer aid for intraoral positioning of these elements. This system offers the advantage of retrievability of the prosthesis in multiunit cases.

This paper describes a robust approach exploiting input-output decoupling controller for mobile manipulators. The robust controller consists of using a classical proportional-derivative (PD) feedback structure to stabilize the position error plus an additional disturbance observer (DOB) to compensate external disturbances and uncertainties. Simulation results on a mobile platform with 2-DOF man...

Inherently, biochemical regulatory networks suffer from process delays, internal parametrical perturbations as well as external disturbances. Robustness is the property to maintain the functions of intracellular biochemical regulatory networks despite these perturbations. In this study, system and signal processing theories are employed for measurement of robust stability and filtering ability ...

We report a new phenomenon in cross-modal cuing of visual spatial attention-simultaneous auditory peripheral cues are "hyper-effective"-more effective than auditory peripheral (AP), visual central (VC), or visual peripheral (VP) cues that preceded the target with ample time for preparatory orienting. The time courses and mechanisms of visual spatial attention were measured in a four-location Ga...