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ABSTRACT This report describes the occurrence of pneumonitis in a young male immediately after inhalation of aerosolized chemicals subsequent to motor vehicle airbag deployment. The clinical presentation was one of [...]

This article gives many praises to the literary works of poet Fred Cogswell. There are many inclinations in dealing with the major preoccupations and grievances that appear on the human stage of life and the ability to see deeply and with sympathy into the hearts of the people appearing on that stage from childhood into his present years. The writer also recognizes that the value of language can be used as a medicine for his own deeply burdened soul.

Abstract—We have used dual coaxial microchannel plate image‐intensified monochrome charge‐coupled device (CCD) detectors run at standard NTSC frame rates (30 frames per second, fps) to study the Leonid meteor shower on 1998 November 17 from an airborne platform at an altitude of ∼13 km. These observations were part of NASA's 1998 Leonid multi‐instrument aircraft campaign (MAC). The observing systems had fields of view (width) of 16.3° and 9.5°, and limiting stellar sensitivities of +8.3mand +8.9m. During 12 h of recording, 230 meteors were detected, of which 65 were Leonid meteors. Light curves are presented for 53 of these meteors. The magnitudes at peak brightness of the meteors investigated were generally in the range from +4.0mto +6.0m. The mass distribution indices for the two samples are 1.67 and 1.44, with the former being based on the wider field of view dataset. The light curves were skewed with the brightest point towards the beginning of the meteor trail. The Fparameter for points one magnitude below maximum luminosity had a mean value of 0.47 for the wider field system and 0.37 for the more sensitive narrower field system. We provide leading and trailing edge light curve slopes for each meteor as another indication of light curve shape. There were few obvious flares on the light curves, indicating that in‐flight fragmentation into a large number of grains is not common. There is variability in light curve shape from meteor to meteor. The light curves are inconsistent with single, compact body meteor theory, and we interpret the data as indicative of a two‐component dustball model with metal or silicate grains bonded by a lower boiling point, possibly organic, substance. The variation in light curve shape may be indicative of differences in mass distribution of the constituent grains. We provide trail length vs.magnitude data. There is only a slight hint of a bend at +5min the data, representing the difference between meteors that have broken into a cluster of grains prior to grain ablation, and those that continue to fragment during the grain ablation phase. Two specific meteors show interesting light curve features. One meteor is nebulous in appearance, with significant transverse width. The apparent light production region extends for 450 m from the center of the meteor path. Another meteor has several main fragments, and evidence of significant separated fragments. We offer several suggestions for improvements for the 1999 Leonid MAC light curve experiment.

Photon diffusion theory was used to model photobleaching and tissue necrosis resulting from broad-beam therapeutic light irradiation of tissue containing a photosensitizer. The photosensitizer fluorescence signal at the tissue surface was simulated with both broad-beam and pencil-beam excitation. The relationship between the decreasing fluorescence signal and the increasing depth of tissue photodynamic damage during treatment was examined. By analyzing spatially resolved fluorescence measured at the tissue surface in terms of an equivalent virtual point or planar source of fluorescence within the tissue, predictions of necrosis depth that are insensitive to a range of initial treatment parameters were shown to be possible. Preliminary measurements in tissue-simulating phantoms supported the main theoretical findings. The potential value and feasibility of this technique for photodynamic therapy dosimetry are discussed.

Meteoroids can be observed at collision with the Earth's atmosphere as meteors. Different methods of observing meteors are presented: besides the traditional counts of individual events, exact methods yield also data on the geometry of the atmospheric trajectory; on the dynamics and ablation of the body in the atmosphere; on radiation; on the spectral distribution of radiation; on ionization; on accompanying sounds; and also data on orbits. Theoretical models of meteoroid interaction with the atmosphere are given and applied to observational data. Attention is paid to radar observations; to spectroscopic observations; to experiments with artificial meteors and to different types of meteor sounds. The proposed composition and structure of meteoroids as well as their orbits link them to meteorites, asteroids and comets. Meteor streams can be observed as meteor showers and storms. The rate of influx of meteoroids of different sizes onto Earth is presented and potential hazards discussed.

Photometric low-light level video observations of 1999 Leonid storm meteors have been obtained from two airborne platforms during the Leonid multi-instrument aircraft campaign (Leonid MAC). The 1999 Leonid light curves tend to be skewed towards the end point of the trajectory, while the 1998 Leonid light curves were not. The variation in the light curves from 1998 and 1999 can be explained as an overall reduction in the mass distribution index, α from ∼ 1.95 in 1998 to ∼ 1.75 in 1999. We have interpreted this behaviour as being either indicative of a gradual loss of the "glue" that keeps the grains together, or the fact that the meteoroids sampled in 1998 had a different morphological structure to those sampled in 1999. The early fragmentation of a dustball meteoroid results in a light curve that peaks sooner than that predicted by classical single body ablation theory.

Different combinations of reasoning and experience define four "truth strategies"-sets of rules which guide the search for knowledge and the elimination of error-in the modern university. The authors discuss how the presence of multiple truth strategies and shifts in strategies within fields affect the organization and administration of universities.

An attempt is madeto identify a typology of “fiddles”—informal and formal devices used by individuals and groups to facilitate communication and adhesion. Fiddling is defined as minor diversionary activity which is not directly related to the primary purpose of the person or group in communication. Identified and described on the personal level is the “fidget fiddle”; in interpersonal communication, the “conversational fiddle” and the “ritual fiddle”; in larger groups, the “orchestral fiddle” and the “task fiddle.” The “strategic fiddle,” applied to both interpersonal and group communication, is discussed. Briefly mentioned are the “catalytic fiddle” and the “status fiddle.”

Pyomyositis of the obturator externus muscle is a rare cause of limp and hip pain in children. The exact etiology of the condition remains poorly understood, although a mechanism of transient bacteremia in association with increased muscle susceptibility has been proposed. This case describes the course of a child from presentation to diagnosis and demonstrates the requirement for magnetic resonance imaging in establishing a diagnosis.

Presents letters to the editor of "BMX PLUS!" regarding issues related to cycling. Advantages of riding in Macomb County, Michigan; Criticisms against art works from readers featured by the magazine; Information on a bicycle won from the magazine.

The cinnabar moth. Tyria jacobaceae (L.), is making promising progress in the control of tansy ragwort, Senecio jacobaea near Fort Bragg, California. Although the insect is established in other areas of California and Oregon, the densities of populations have not yet reached the level required for control of the plant. In California, biological development of the insect is synchronized with the development of the plant, and parasites, predators, and disease have had little effect on the population at Fort Bragg.