In this paper, a closed-loop switching function for on-off thruster firings is proposed to provide good attitude control performance in the presence of modeling errors for single-axis slew maneuver of a rigid spacecraft and to eliminate double-sided thruster firings. The size of a single-sided deadband in the switching function provides the capability of a tradeoff between maneuver time and fue...

Paroxysmal supraventricular tachycardia (PSVT) is a common clinical problem. Valsalva maneuver and adenosine are effective therapies for many patients with PSVT, although any conversion to an irregular or wide complex tachycardia should prompt consideration of a preexcitation syndrome. We report a case where the Valsalva maneuver and adenosine, in a patient with PSVT and previously undiagnosed ...

As the database environment changing, database is no longer accessed only by using SQL to communicate with DBMS as in the two-tier client-server architecture. In modern enterprise distributed systems, applications are developed and deployed as components in n-tier architecture. Database system is integrated with related applications and can only be accessed via interfaces provided by the applic...

(CHEST 2004; 125:302–304) A 56-year-old man presented with complaints of dysphagia and shortness of breath for the past 2 days. He denied chest pain, cough, fever, chills, or chest trauma. Ten days prior to hospital admission, the patient was self-treated with the Heimlich maneuver after choking on a piece of candy. The patient had a 120 –pack-year history of smoking and a medical history signi...

Abstract--This paper gives a complete analysis of the problem of aeroassisted return from a high Earth orbit to a low Earth orbit with plane change. A discussion of pure propulsive maneuver leads to the necessary change for improvement of the fuel consumption by inserting in the middle of the trajectory an atmospheric phase to obtain all or part of the required plane change. The variational pro...

BACKGROUND Jaw-thrust is a noxious stimulus that might induce sympathetic responses. The purpose of this study, was to evaluate the effects of jaw-thrust on sympathetic responses. METHODS We investigated seventy three patients. Patients who received general anesthesia were randomly divided into a control group (maintenance of combined airway maneuver with head tilt, open mouth by mouthpiece, ...

PURPOSE We investigated the effect of handgrip (HG) maneuver on time-varying estimates of dynamic cerebral autoregulation (CA) using the autoregressive moving average technique. METHODS Twelve healthy subjects were recruited to perform HG maneuver during 3 minutes with 30% of maximum contraction force. Cerebral blood flow velocity, end-tidal CO₂ pressure (PETCO₂), and noninvasive arterial blo...