The development and performance of a perforated plate burner to produce vitiated flow with negligible swirl under engine-relevant gas turbine conditions.

The development and performance of a perforated plate burner (PPB) operating using premixed natural gas and air at engine-relevant inlet temperatures and combustor pressures with thermal powers up to 1 MW is discussed. A significant benefit of using burners with simplified flow fields, such as the PPB, for experimental studies in the laboratory is the potential for decoupling the complex fluid dynamics in typical combustors from the chemical kinetics. The primary motivation for developing this burner was to use it as a source of vitiated flow with negligible swirl for reacting jet in vitiated crossflow experiments.

Retinotopic organization of extrastriate cortex in the owl monkey--dorsal and lateral areas.

Dense retinotopy data sets were obtained by microelectrode visual receptive field mapping in dorsal and lateral visual cortex of anesthetized owl monkeys. The cortex was then physically flatmounted and stained for myelin or cytochrome oxidase. Retinotopic mapping data were digitized, interpolated to a uniform grid, analyzed using the visual field sign technique-which locally distinguishes mirror image from nonmirror image visual field representations-and correlated with the myelin or cytochrome oxidase patterns.

Achieving normothermia in patients with febrile subarachnoid hemorrhage: feasibility and safety of a novel intravascular cooling catheter.

Introduction: Fever is common and difficult to control in patients with subarachnoid hemorrhage (SAH). We have previously shown an inverse relationship between fever and outcome in patients with SAH.

Materials/methods: This was a prospective, single-arm, feasibility trial in which nine patients with SAH underwent temperature management using an intravascular cooling catheter (ICC) to restore and maintain 24 hours of normothermia (36.

Continuous antibiotic prophylaxis and cerebral spinal fluid infection in patients with intracranial pressure monitors.

Introduction: Inconsistencies in the recommendation of prophylactic antibiotics for patients with intracranial pressure monitors compelled us to assess the effect of our standard regimen of continuous antibiotic prophylaxis on cerebrospinal fluid infection. We examined the rate, possible risk factors, causative organisms, and characteristics of infection.

Methods: Three hundred eleven patients admitted between September 1998 and February 2001 with an intracranial pressure monitoring device in place were included.

CT angiography with whole brain perfused blood volume imaging: added clinical value in the assessment of acute stroke.

Background And Purpose: In CT angiographic and perfusion imaging (CTA/CTP), rapid CT scanning is performed during the brief steady state administration of a contrast bolus, creating both vascular phase images of the major intracranial vessels and perfused blood volume-weighted parenchymal phase images of the entire brain. We assessed the added clinical value of the data provided by CTA/CTP over that of clinical examination and noncontrast CT (NCCT) alone.

Methods: NCCT and CTA/CTP imaging was performed in 40 patients presenting with an acute stroke.

Subarachnoid Hemorrhage.

Patients presenting with subarachnoid hemorrhage from aneurysmal rupture benefit from early repair of the aneurysm. Recent advances in endovascular technology now allow informed discussion of the merits of surgical versus endovascular repair of the aneurysm. Patients need close observation in an intensive-care unit following subarachnoid hemorrhage to diagnose and treat the multiple complications that result.

Xanthogranuloma of the choroid plexus in the fat-tailed dwarf lemur (Cheirogaleus medius).

This report documents the death of two fat-tailed dwarf lemurs (Cheirogaleus medius) maintained over 6 years each in our laboratory. Postmortem studies revealed xanthogranuloma of the choroid plexus, a mass replete with stored lipids, including cholesterol crystals. Six months prior to their deaths, both animals developed a peculiar head tilt and signs suggestive of neurological dysfunction.