Objective To determine if an educational intervention aimed at house staff will increase knowledge about and recognition of delirium. Design Before/after study, with blinding participants to the intent study. Setting University hospital in Halifax, Nova Scotia. Patients One hundred eighty‐seven control patients, seen as consecutive admissions elderly patients (65+ years) General Medicine services Victoria Hospital prior intervention, 247 thereafter. Intervention Educational grand rounds,...

The time-averaged intensity of electrons with energy (E)≳40 kev has been measured Explorer 12 to be the order 107 particles (cm2 sec)−1 between equatorial radial distances (L) ∼2 and ∼10 earth radii. outflux these State University Iowa satellite Injun 1 at 1000-km altitude over North America. average varied from ∼103 invariant latitude (Λ) ∼45° ∼105 in auroral zone then fell off very rapidly higher latitudes. Accordingly, if source was stopped, but continued same rate, outer beyond L ≳2...

The relation of the structure retina to factors influencing visual acuity is examined in some detail. Dimensions foveal cones have been redetermined a series measurements on histological materials from several sources. In no case has center distance between most central adult human eyes found less than 2.0μ nor greater 2.3μ, these being values for living eye, due allowance made shrinkage preparations. Photomicrographs mosaic are shown illustrate rapid increase short small fovea. These...

t o "he satellite Injun I was used to find the high latitude termination of trapping electrons with energy E Z 40 keV at lo00 km altitude over North America.average, this is L -16 or A local day and ., 8 r 69" in night.consequence, range 5. 5 16 75" , average intensity trapped some one hundred On -75" As a times greater than it night.Several explanations are suggested but none proven.results show that McIlwain's parameter loses its simple applicability for 2 6 The ? 66".

The intensity and spectrum of electrons at 1000-km altitude were measured by detectors on the SUI satellite Injun I magnetic latitudes between about 45° 80°. A preliminary report is given here for period July August 1961; further observations are continuing. Trapped with energy above 40 kev found 75° in typical intensities 105 to 106 particles (cm2 sec ster)–1, peak 4×106 ster)−1. was less than 102 ster)–1. Occasionally electron reached a broad around 50° second near auroral zone. region...

The State University of Iowa's satellite Injun 1 (1961/sub O/sub 2/) was launched at 0422 UT on June 29, 1961, and is in an orbit 67 deg inclination with apogee 998 km perigee 881 km. Amorig the instruments are silicon p-n junction detectors sensitive to protons energy between 15 Mev, a Geiger counter above 40 Mev. These units detected solar during period considerable activity extending from July 11 28, epoch containing twelve flares class 2 or 3 six major magnetic storms that can be divided...

A coordinated experiment with rocket-borne particle detectors and ground-based photometers has shown that the ratio of differential flux alpha particles Ea ∼ 200 kev to protons Ep 100 was approximately 1.6% in an aurora on February 9, 1967. This value is consistent ratios observed at time by spacecraft solar wind but not He++/H+ thermal ion densities measured between ionosphere altitude 20,000 km. These data argue energetic auroral ions were originally constituents accelerated altitudes...

Get PDF Email Share with Facebook Tweet This Post on reddit LinkedIn Add to CiteULike Mendeley BibSonomy Citation Copy Text Brian O'Brien, "A Theory of the Stiles and Crawford Effect," J. Opt. Soc. Am. 36, 506-509 (1946) Export BibTex Endnote (RIS) HTML Plain alert Save article

Rocket measurements of midlatitude nightglow and particle fluxes indicate different sources for aurorae 5577 angstrom line

Injun 1 satellite observations to show the relationship between auroral absorption of radio waves and electron fluxes

Quiescent dumping of electrons with energy above 40 kev in intensities the order 104 particles (cm2 sec ster)−1 was detected by Injun I satellite at altitudes about 1000 km and high latitudes around July 1, 1961. In 16 passes between longitudes 230°E 340°E, angular distribution magnetic vector B showed there every one 8 1200 1500 local time, only 1900 2300. When no dumping, directional intensity ∼20° from normal to less than 1 per cent that B. corresponding value 100 cent, 50° 10 Appreciable...

Measurements were made on clean mercury surfaces prepared by the method of Roentgen as used Wheeler. The optical constants determined for range 4358 to $3022A$ using Jamin. Light from a arc was dispersed quartz spectroscope Littrow type with fused silicon mirror reduce scattered visible light, and phosphorescent screen or fluorescent solution in making readings. results refractive index $n$, absorption coefficient $\mathrm{nk}$ computed percentage reflectivity $R$ at normal incidence, are...

The pitch-angle distributions, energy spectra, and temporal spatial variations of auroral electrons with energies from 40 ev to 100 kev were measured the Twins 2 rocket payloads an altitude 800 km. Enhancements ∼5 kev, pitch angle α≤10°, intensities up 5×10s particles cm−2 sec−1 ster−1 observed occasionally. enhancements sometimes by a factor 10, even while ∼12 at these angles showed no changes (nor did those between ∼40 30°≤α≤60°). bursts thought be in origin, they lasted for minimum...

The temporal and spatial variations of the energy spectrum solar protons energies 0.5<E<60 Mev as observed by particle detectors in State University Iowa satellite Injun 1 during July 1961 have been studied. electron density lower ionosphere to be expected from proton flux are good agreement with at high latitudes same period. difference polar-cap absorption two different types events discussed.

During a severe geomagnetic storm on November 28, 1959, two Geiger tubes satellite Explorer VII (1959t) found anomalies in the outer radiation zone at an altitude of about 1000 km which appear to be correlated space and time with optical emissions from atmosphere beneath. Very intense narrow zones were detected over visible aurora during one pass. The three such was harder toward low latitudes. On subsequent passes deduced subvisible 6300 A arc, whose brightness diminished as became less...

It has been found that the perturbation in geomagnetic field produced by auroral electrojet also perturbs pitch-angle distribution of precipitated electrons are dominant contributors to ionization within which it is assumed flows. To study this interaction detail, a computer program developed for model calculations. This computes: (1) electron concentration profile ionosphere from given and energy ionizing electrons, (2) changes created deformations caused current system itself. Results...