In an effort to understand the role of neutral flow dynamics in the operation of Hall thrusters, a floating emissive probe was used to measure the plasma potential, electric field, and electron temperature in the discharge channel of a 6-kW Hall thruster operating at 300 V and anode flow rates of 10, 20, and 30 mg/s. To isolate the effect of propellant flow rate, the cathode flow fraction and m...

A prospective study was undertaken on 50 acute, consecutive fractures of the radial head. Clinical examination and stress testing were performed on each patient. A valgus stress radiograph, in conjunction with clinical stress testing, was used to assess competence of the medial elbow ligaments. Axial stability of the radius was determined by the axial stress test. Eleven patients (22%) sustaine...

We present laser-induced fluorescence velocimetry measurements obtained using the Xe I 6s[3/2]2 → 6p[3/2]2 transition at 823.4 nm (vacuum) and the Xe I 6s’[1/2]1 → 6p’[3/2]2 transition at 834.9 nm (vacuum) from the inside and in the near-field plume of a 6-kW Hall thruster. The thruster is operated under seven conditions with discharge voltages ranging from 150 to 600 V, and anode mass flow rat...

Instruction: Measurement of brachial artery diameter variation by ultrasound methods has commonly been used to test the endothelial function. It is known that the artery diameter is increased by flow stimulation. Therefore in the present study, the effect of external obstruction, as flow stimulation, on the radial strain of the brachial artery was assessed. Also the biomechanical behavior of...

The present study examines the manner in which several whole-tree water transport properties scale with speciesspecific variation in sapwood water storage capacity. The hypothesis that constraints on relationships between sapwood capacitance and other water relations characteristics lead to predictable scaling relationships between intrinsic capacitance and whole-tree behaviour was investigated...

A Mach 0.9 jet at Reynolds number 3600 is simulated along with its radiated sound by direct numerical solution of the flow equations. The numerical simulation is shown to be in excellent agreement with experimental measurements at the same flow conditions. Basic turbulence and sound statistics are presented and analyzed. Pressure data is Fourier transformed in the streamwise direction and in ti...

This work presents a comparison study of the CFD modeling with two different turbulence approaches viz. unsteady RANS and LES, on full-scale model (New) MEXICO rotor wind turbine. The main emphasis paper is wake aerodynamics. Simulations are carried out for three speeds considered in experiment (10, 15, 24 ms−1). results uRANS LES compared against experimental measurements pressure distribution...