37,223 research outputs found
War Gender and Dancing: Gettysburg College and the USO During World War II
Made up of women and the men who could not join the military, the home front was more than just victory gardens and factory jobs. Although factory work was seen as a way for women both to help the war effort and at the same time gain some independence outside the home, not every woman was ready to hang up her dress and start donning pants full time. There was a middle ground where women were able to break traditional feminine roles yet still keep their dresses and serve the servicemen fighting the war between victory gardens and factory jobs; a balance was found in volunteer organizations designed to serve the military. The largest and most well-known organization on the home front was the United Services Organization, more commonly referred to as the USO. After the outbreak of World War II, USO canteens start to appear everywhere across the United States in towns and cities alike. Gettysburg, Pennsylvania was one of many towns with their own USO branch. The Gettysburg branch was supported by the female students at Gettysburg College and the Army Air Corps detachment stationed on campus which provided an opportunity for local young women to explore new social roles while supporting the war effort. [excerpt
The Nature of Radio Emission from Distant Galaxies
I describe an observational program aimed at understanding the radio emission
from distant, rapidly evolving galaxy populations. These observations were
carried out at 1.4 and 8.5 GHz with the VLA centered on the Hubble Deep Field.
Further MERLIN observations of the HDF region at 1.4 GHz provided an angular
resolution of 0.2" and when combined with the VLA data produced an image with
an unprecedented rms noise of 4 Jy. All radio sources detected in the VLA
complete sample are resolved with a median angular size of 1-2". The
differential count of the radio sources is marginally sub-Euclidean ( =
-2.4 0.1) and fluctuation analysis suggests nearly 60 sources per
arcmin are present at the 1 Jy level. A correlation analysis indicates
spatial clustering among the 371 radio sources on angular scales of 1- 40
arcmin.
Optical identifications are made primarily with bright (I = 22) disk systems
composed of irregulars, peculiars, interacting/merging galaxies, and a few
isolated field spirals. Available redshifts span the range 0.2 - 3. These clues
coupled with the steep spectral index of the 1.4 GHz selected sample are
indicative of diffuse synchrotron radiation in distant galactic disks. Thus the
evolution in the microjansky radio population is driven principally by
star-formation.
I have isolated a number of optically faint radio sources (about 25% of the
overall sample) which remain unidentified to I = 26-28 in the HDF and flanking
optical fields. Several of these objects have extremely red counterparts and
constitute a new class of radio sources which are candidate high-z dusty
protogalaxies.Comment: dissertation summary to be published in PASP, sucessfully defended on
May 19, 1999 at the University of Virginia, committee composed of R. W.
O'Connell (UVa), K. I. Kellermann (NRAO), E. B Fomalont (NRAO), T. X. Thuan
(UVa), P. Humphreys (UVa), and J. Wall (Oxford
Method and apparatus for optical modulating a light signal Patent
Method and apparatus for optically modulating light or microwave bea
Optically induced free carrier light modulator
Signal carrier laser beam is optically modulated by a second laser beam of different frequency acting on a free carrier source to which the signal carrier laser is directed. The second laser beam affects the transmission characteristics of the free carrier source to light from the signal carrier laser, thus modulating it
MERLIN imaging of the maser flare in Markarian 348
MERLIN images of Mrk 348 at 22 GHz show water maser emission at 0.02 - 0.11
Jy, within approximately 0.8 pc of the nucleus. This is the first direct
confirmation that molecular material exists close to the Seyfert 2 nucleus. Mrk
348 was observed in 2000 May one month after Falcke et al. (2000) first
identified the maser in single-dish spectra. The peak maser flux density has
increased about threefold. The masing region is < 0.6 pc in radius. The flux
density of radio continuum emission from the core has been rising for about 2
years. The maser-core separation is barely resolved but at the 3 sigma
significance level they are not coincident along the line of sight. The masers
lie in the direction of the northern radio lobes and probably emanate from
material shocked by a jet with velocity close to c. The correlation between the
radio continuum increase and maser flare is explained as arising from high
level nuclear activity through a common excitation mechanism although direct
maser amplification of the core by masers tracing a Keplerian disc is not
completely ruled out.Comment: Accepted by MNRAS Letters, 5 pages, 3 figures, corrections in text
and figur
Method for detecting pollutants
A method is described for detecting and measuring trace amounts of pollutants of the group consisting of ozone, nitrogen dioxide, and carbon monoxide in a gaseous environment. A sample organic solid material that will undergo a chemical reaction with the test pollutant is exposed to the test environment and thereafter, when heated in the temperature range of 100-200 C., undergoes chemiluminescence that is measured and recorded as a function of concentration of the test pollutant. The chemiluminescence of the solid organic material is specific to the pollutant being tested
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