The transcriptional induction of the chicken ovalbumin gene by steroid hormones is abolished by inhibitors of protein synthesis such as cycloheximide, suggesting that a labile protein mediates this process. A steroid-dependent regulatory element (SDRE) has been identified in the 5'-flanking region of the gene between -900 and -780 that is required for induction by steroids. Additional transfect...

This paper proposes a Multi-hop Radio Access Cellular (MRAC) scheme for achieving both highspeed/high-capacity and good area coverage in fourth generation mobile communications systems. In this scheme, we assume two kinds of hop stations, one is a dedicated repeater station installed at a good propagation location such as a rooftop, and the other is a user terminal that temporarily experiences ...

In this paper a robust design process is introduced for a scalar model reference adaptive control (MRAC) algorithm. Three different types of MRAC control rules are reviewed and analysed in the frequency domain. A design process for MRAC is given within the range of plant settling times 0.01-100 seconds which is relevant for a wide range of mechanical systems. By using this design method the MRA...

In this paper, the speed regulation problem for permanent synchronous motor (PMSM) system under vector control framework is studied. A model reference adaptive controller (MRAC) based on Lyapunov stability theory is first designed. Noticing the standard MRAC method provides a poor disturbance rejection performance in the case of strong disturbances, a composite control method which combines MRA...

In this paper a nonlinear controller technique, referred to State-Dependent Riccati Equation (SDRE), is exploited to handle relative position tracking and attitude synchronization problem involving in docking manoeuvring operations between two Earth orbiting satellites. More specifically a testbed developed by DLR-Institute of Space Systems is used for testing the proposed control algorithm. Th...

Abstract We add the σ -modification and low-frequency learning to model reference adaptive controller (MRAC) (Guduri et al. in SN Appl Sci 3:1–21, 2021) make it robust presence of two simultaneous bounded disturbances maintain consistent mean particles’ temperature velocity collectively called states (MPSs) when they impact substrate be coated. The MPSs affect coating quality. Even though resul...

his paper is devoted to the design and analysis of a state-predictor based direct adaptive controller for MultiInput-Multi-Output (MIMO) dynamical systems, with matched uncertainties. Our main intent is to evaluate possibility of improving MRAC transient characteristics during a tracking task. Towards that end, we propose the use of a state-predictor in formulating adaptive laws. Specifically, ...

The control of a satellite can be designed with success by linear theory if the has slow angular motions. However, for fast maneuvers, linearized models are not able to represent effects nonlinear terms. One candidate technique design satellite’s under maneuvers is State- Dependent Riccati Equation (SDRE). SDRE provides an effective algorithm synthesizing feedback allowing nonlinearities. Nonet...

Turku PET Centre, Turku University Hospital, Turku, Finland The aim of the study was to evaluate the effect of misalignment and head motion on image quantification in PET/MR with a novel brain phantom and a healthy control group. The phantom was imaged at two time points in PET/MR, concurrently with PET and PET/CT. Phantom images were evaluated visually and the relative difference in hemispheri...

This paper presents a detailed perspective of two constructive feedback strategies characterized by algebraic Riccati equations for solving continuous-time nonlinear deterministic optimal control problems. In each case, the system is first transformed into a linear-like, state-dependent structure. The first method is based on treating the adapted model as an instantaneously linear time-invarian...