Robert J. Bakos

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Deep brain stimulation (DBS) is a widely used neurosurgical approach to treating tremor and other movement disorders. In addition, the use of DBS in a number of psychiatric diseases, including obsessive-compulsive disorders and depression, is currently being tested. Despite the rapid increase in the number of individuals with surgically implanted(More)
Detonations can be used to generate a high-pressure gas of high acoustic speed to drive a shock tube. Recently, detonation driven facilities have been implemented for meaningful hypervelocity testing. These facilities can be operated with the detonation wave propagating either downstream or upstream. The advantages and problems associated with these methods(More)
The authors report the case of a 74-year-old woman who underwent an L-2 vertebral kyphoplasty. The patient experienced delayed postoperative hemodynamic deterioration that may have been caused by embolization of polymethylmethacrylate (PMMA) cement through the right cardiac ventricular wall. Cardiac and pulmonary embolization of bone cement can develop as a(More)
NASA’s HYPULSE facility at GASL has been reconfigured to permit free jet testing of the Hyper-X flowpath at flight Mach numbers of 7 and 10. Among the required changes are addition of a converging-diverging nozzle to permit operation in a reflected shock tunnel mode, a 7 ft. diameter test cabin and a 30 in. diameter contoured nozzle. However, none of these(More)
This paper shows the possibility of applying concept maps as diagnostic tools in assessing knowledge. The authors introduce the terms “ideal knowledge structure”, “desired knowledge structure” and “real knowledge structure” as milestones in indicating levels of acquired knowledge. The role of concept mapping in the diagnostics of knowledge was tested in the(More)
Oscillatory behaviour in the pH value has been observed during the oxidation of sulfite by hydrogen peroxide mediated by hemin, a well known enzyme model compound, in a continuous-flow stirred tank reactor. The dynamics of this reaction has been studied for a variety of flow rates of the reactants. As the flow rates increase, the oscillations evolve from(More)
A series of Hyper-X Mach 10 flowpath ground tests are underway to obtain engine performance and operation data and to confirm and refine the flowpath design methods. The model used is a full-scale height, partial-width replica of the Hyper-X Research Vehicle propulsive flowpath with truncated forebody and aftbody. This is the fifth test entry for this model(More)
The CO2-laser ray guided at 90 degrees to the surface creates a crater of typical "v" shape. If the guide angle of the ray deviates therefrom and the smaller the angle of incidence than 90 degrees, destruction becomes the more astymmetric, the crater takes an ever more flattened eliptical shape. The lack of tissue becomes even more superficial, thus removal(More)
New hypervelocity capabilities for scramjet testing have recently been demonstrated in the HYPULSE Shock-Expansion Tunnel (SET). With NASA's continuing interests in scramjet testing at hypervelocity conditions (Mach 12 and above), a SET nozzle was designed and added to the HYPULSE facility. Results of tests conducted to establish SET operational conditions(More)