This report summarizes the results of the PPMLIB project.

The management of the risks of exposure of people to ionizing radiation is important in relation to its uses in industry and medicine, also to natural and man-made radiation in the environment. The vase majority of exposures are at a very low level of radiation dose. The risks are of inducing cancer in the exposed individuals and a smaller risk of inducing genetic damage that can be indicate that they are low. As a result, the risks are impossible to detect in population studies with any accuracy above the normal levels of cancer and genetic defects unless the dose levels are high. In practice, this means that our knowledge depends very largely on the information gained from the follow-up of the survivors of the atomic bombs dropped on Japanese cities. The risks calculated from these high-dose short-duration exposures then have to be projected down to the low-dose long-term exposures that apply generally. Recent research using cells in culture has revealed that the relationship between high- and low-dose biological damage may be much more complex than had previously been thought. The aims of this and other projects in the DOE's Low-Dose Program are to gain an understanding of the biological actions …

LCS experiments were carried out at the Idaho Accelerator Center (IAC); sharp monochromatic x-ray lines were observed. These are produced using the so-called inverse Compton effect, whereby optical laser photons are collided with a relativistic electron beam. The back-scattered photons are then kinematically boosted to keV x-ray energies. We have first demonstrated these beams using a 20 MeV electron beam collided with a 100 MW, 7 ns Nd; YAG laser. We observed narrow LCS x-ray spectral peaks resulting from the interaction of the electron beam with the Nd; YAG laser second harmonic (532 nm). The LCS x-ray energy lines and energy deviations were measured as a function of the electron beam energy and enery-spread respectively. The results showed good agreement with the predicted valves. LCS could provide an exellent probe of electron beam energy, energy spread, transverse and longitudinal distribution and direction.

B-roll video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.

Video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.

Video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.

Daily newspaper from Baytown, Texas that includes local, state, and national news along with advertising.

Commencement program for the fall 2002 graduating class of the University of North Texas, held in the Coliseum on Saturday, December 14, 2002. The program contains the order of service and a list of graduates for the baccalaureate, master's, doctoral degrees.

Invitation request by President Norval Pohl and Dr. Barbikay Pohl for the fall 2002 reception honoring graduates, their families, and guests on Saturday, December 14, 2002, at the Gateway Ballroom.

Video recording from The Black Academy of Arts and Letters recorded during their 10th Annual Christmas Kwanzaa Concert event in 2002. This video features various holiday performances by youth and adults to celebrate Christmas and Kwanzaa live on the Naomi Bruton Main Stage. This video is Part 1 of 2 of the event.

Video recording from The Black Academy of Arts and Letters recorded during their 10th Annual Christmas Kwanzaa Concert event in 2002. This video features various holiday performances by youth and adults to celebrate Christmas and Kwanzaa live on the Naomi Bruton Main Stage. This video is Part 2 of 2 of the event.