This study considers the problem of fault estimation for rigid satellite in presence external disturbances, parameter perturbations, and actuator time-varying faults. Firstly, a Takagi-Sugeno (T-S) fuzzy model with interval matrix attitude system under large angle scope is established, along detailed analysis faults terms additive multiplicative descriptions. Then, novel adaptive observer adjus...

A simple single parameter adjustable immittance concept designed with modular active devices, fabricated in I3T $25~0.35~\mu \text{m}$ 3.3 V CMOS process of ON Semiconductor, is introduced. The proposed devices employ an integer-order capacitor and specifically fractional-order capacitors (sometimes called constant phase elements). topology consists two elements, namely a linearly voltage opera...

Adjustable suture in strabismus surgery is a way to get accurate alignment of the eyes after operation. This technique is used in cooperative patients, being either adults or children. We report the result of this technique in 120 patients, 70 with esotropia and 50 exotropia. The amount of deviation was between 20 and 60 prismdiopters. The patients were mostly adults and teenagers. and the...

We investigate electron and ion surface states of a negatively charged dust particle in a gas discharge and identify the charge of the particle with the electron surface density bound in the polarization-induced short-range part of the particle potential. On that scale, ions do not affect the charge. They are trapped in the shallow states of the Coulomb tail of the potential and act only as scr...

Experienced bow makers empirically know the influence of wood, tapering, and camber on the playing and tonal qualities of a bow. However, the way each parameter affects the bow mechanical behavior is not clearly established. An in-plane finite element model is developed to highlight the link between the adjustable design parameters and the mechanical behavior of a bow. This model takes into acc...

This paper presents a novel approach to modified a strain field of linear triangular FEM model with an adjustable parameter α. Using meshes with the same aspect ratio, a preferable approach has been proposed to obtain a nearly exact solution in strain energy for linear problems. In this paper, it is extended to the free and forced analysis of two-dimensional dynamic for solid mechanics problems...

Pancreatic islets exhibit bursting oscillations that give rise to oscillatory Ca (2+) entry and insulin secretion from β-cells. These oscillations are driven by a slowly activating K (+) current, Kslow, which is composed of two components: an ATP-sensitive K (+) current and a Ca (2+) -activated K (+) current through SK4 channels. Using a mathematical model of pancreatic β-cells, we analyze how ...

We report on the observation of collective radiative decay, or superradiance, of cyclotron resonance (CR) in high-mobility two-dimensional electron gases in GaAs quantum wells using time-domain terahertz magnetospectroscopy. The decay rate of coherent CR oscillations increases linearly with the electron density in a wide range, which is a hallmark of superradiant damping. Our fully quantum mech...

The cage and reluctance rotors are two major types of rotor structures used in the doubly fed brushless machine (DFBM). In order to study comparatively the effects of different rotor structure on the DFBM, a prototype machine has been specially designed and built. The experimental parameter and performance comparisons between the axially laminated anisotropic (ALA) and cage-rotor machines are p...