SUMMARY Two experimental glide path and flare systems are described, one using spoilers installed in the aircraft to provide direct lift control. The various longitudinal control modes, altitude hold, glide path and flare, have similar feedback control gains whose values were determined by parameter optimisation. An assessment of the performance of these two systems is described. Using elevator...

BACKGROUND The association of inflammatory factors and the aqueous flare value with macular edema in branch retinal vein occlusion (BRVO) patients remains unclear. The relationship between the aqueous flare value and the vitreous fluid levels of vascular endothelial growth factor (VEGF), interleukin (IL)-6, monocyte chemotactic protein (MCP)-1, soluble intercellular adhesion molecule 1 (sICAM-1...

Neurosarcoidosis affects 5%-10% of Sarcoidosis patients. The etiology of a sarcoidosis flare has been unknown. Several factors have been implicated in the pathogenesis of an acute flare, including genetic, environmental and infectious agents. We report the case of a 52-year-old female with known neurosarcoidosis who presented with altered sensorium on two occasions. On both episodes she had lep...

[1] We measured the midlatitude daytime ionospheric D region electron density profile height variations in July and August 2005 near Duke University by using radio atmospherics (or sferics for short), which are the high‐power, broadband very low frequency (VLF) signals launched by lightning discharges. As expected, the measured daytime D region electron density profile heights showed temporal v...

MAG4 is a technique of forecasting an active region's rate of production of major flares in the coming few days from a free magnetic energy proxy. We present a statistical method of measuring the difference in performance between MAG4 and comparable alternative techniques that forecast an active region's major-flare productivity from alternative observed aspects of the active region. We demonst...

A “white-light prominence” is a flare visible in the continuum above the solar limb. Few examples of this phenomenon have been reported, but the tremendous event of 2003 November 4 was detected by several instruments. This was a partially occulted flare. We report here a detailed study of a much weaker event, seen in this case from a flare whose chromospheric component was on the disk. We find....

We describe ways in which the photospheric vector magnetic field might vary across the duration of a solar flare or CME. We also quantitatively assess the back reaction on the photosphere and solar interior by the coronal field evolution required to release flare energy. Our estimates suggest that the work done by Lorentz forces in this back reaction could supply enough energy to explain observ...

We present the Swift observations of the faint burst GRB 050421. The X-ray light-curve shows at least two flares: the first flare peaking at ∼110 s after the BAT trigger (T0) and the second one peaking at ∼154 s. The first flare presents a flux variation of δF/Fpeak ∼ 3.7 and a short timescale ratio δt/tpeak ∼ 0.07. The second flare is smaller and presents a flux variation of δF/Fpeak ∼ 1.7 and...

A current serious limitation on the studies of solar energetic particle (SEP) events is that their properties in the inner heliosphere are studied only through in situ spacecraft observations. Our understanding of spatial distributions and temporal variations of SEP events has come through statistical studies of many such events over several solar cycles. In contrast, flare SEPs in the solar co...

We report the detection of variable emission from Sgr A* in almost all wavelength bands (i.e. centimeter, millimeter, submillimeter, near-IR and X-rays) during a multi-wavelength observing campaign. Three new moderate flares are detected simultaneously in both near-IR and X-ray bands. The ratio of X-ray to near-IR flux in the flares is consistent with inverse Compton scattering of near-IR photo...