this paper presents h∞ control problem for input-delayed systems. a neutral system approach is considered to the design of pd controller for input delay systems in presence of uncertain time-invariant delay. using this approach, the resulting closed-loop system turns into a specific time-delay system of neutral type. the significant specification of this neutral system is that its delayed coeff...

this paper proposes an approach for the minimum time swing upof a rotary inverted pendulum. our rotary inverted pendulum is supported bya pivot arm. the pivot arm rotates in a horizontal plane by means of a servomotor. the opposite end of the arm is instrumented with a joint whose axisis along the radial direction of the motor. a pendulum is suspended at thejoint. the task is to design a contro...

In this paper, we investigate the problem of bifurcation control for a delayed logistic growth model. By choosing the timedelay as the bifurcation parameter, we present a Proportional - Derivative (PD) Controller to control Hopf bifurcation. We show that the onset of Hopf bifurcation can be delayed or advanced via a PD Controller by setting proper controlling parameter. Under consideration mode...

normal 0 false false false en-us x-none fa microsoftinternetexplorer4 aim : this study aimed to determine the association between pd-1.5c/t (rs2227981, +7785) and the risk of gastric cancer (gc) in an iranian population. background : gastric cancer is the fourth most common cancer in the world. the programmed death 1 (pd-1) is a member of the cd28 super family. pd-1 is a negative regulator of t...

background: parkinson’s disease (pd) is a progressive neurodegenerative disorder causing motor and non‑motor symptoms. the latter are common and include autonomic dysfunction, cognitive impairment, and sleep difficulties. many of the non‑motor aspects of pd such as sleep disturbance are more common and significantly affect the day‑to‑day activities of patients and their quality of life. the mos...

normal 0 false false false en-us x-none ar-sa background: vitamin d insufficiency and serum calcium disturbance have been reported to be more common in parkinson’s disease (pd) patients than in healthy control subjects, which may be due to a chronic disease or reduced mobility contributes to these relatively disturbances. because of the high-vitamin d insufficiency in our population, we aimed t...

introduction: parkinson`s disease (pd) is a chronic disorder of basal ganglia with cardinal signs of resting tremor, bradykinesia, rigidity and postural instability. various studies have evaluated quiet stance postural stability in mild pd but as the authors know there is no consensus on this issue. therefore, the aim of this study was to evaluate stance stability of the subjects at early stage...

normal 0 false false false en-us x-none ar-sa background: t he study on transcranial sonocraphy (tcs) as a diagnostic test for parkinson’s disease (pd) has been neglected in some hospitals. the current study was conducted as the first study to investigate the utility of tcs for diagnosis of pd and its ability to distinguish pd from essential tremor (et) in an iranian population. materials and m...

Introduction: Parkinson disease (PD) is the second frequent human neurodegenerative disease following Alzheimer. This illness is caused by degeneration of dopaminergic neurons in the compact part of substantia nigra (SNpc). Clinical demonstrations are observable when 70% of dopaminergic neurons in SNpc and 80% of dopaminergic terminals in striatum have been degenerated. Characterization of non-...