Milton Keynes - preliminary estimates of regional traffic flows in 1981

The Milton Keynes Development Corporation and their planning consultants have asked the College Transport Group to investigate the scale of likely regional traffic flows into and out of Milton Keynes. At this stage the emphasis is on providing information for the preparation of a Master Plan for the city itself, rather than detailed traffic estimates for planning transport systems in the surrounding region. Population estimates for 1981 have been obtained from County Councils for areas within a 20 mile radius of the new city, and the proportions attracted to Milton Keynes for work and shopping assessed using gravity model techniques. Separate estimates have been made of work journeys from the city to regional employment and to London. Possible upper and lower limits to these forecasts are included to account for many uncertainties in the absolute and relative growth of population, employment and shopping opportunities in the city itself and in the surrounding region. The results are presented as traffic flews into and out of octant sectors around the city. Flows to the east are greater than to the west with work trip flows of the order of 2,500 person trips each way in the most heavily loaded sectors. A 1981 city population of 150,000 is likely to produce at least 1,500 daily commuters to London using the fast rail service, with an additional 200 commuters from the region using Milton Keynes railway station

Faintest Galaxy Morphologies from HSTHST WFPC2 Imaging of the Hawaii Survey Fields

We present very deep $HST$ WFPC2 images in the F814W filter of two Hawaii Survey fields, SSA13 and SSA22. Using these data with previous ground-based imaging and spectroscopy, we compare the colors, star-forming properties and morphologies of the faintest galaxies with a reference sample of bright nearby galaxies and analyze the changes in field galaxy morphology with magnitude. Our principal result is the identification of a new morphological class of ``chain'' galaxies at the faintest magnitudes. Based on limited spectroscopy, we tentatively conclude that these are linearly organized giant star-forming regions at $z = 0.5-3$ and, if this is correct, that these are large galaxies in the process of formation.Comment: 18 pages + 1 table of text as 1 LaTeX file (uses aastex style macros: aaspp.sty, flushrt.sty) plus 1 uuencoded compressed tar file of 12 PostScript figures (Figs. 3-9, 16-17, and 21-23). The remaining gray-scale plots are available by anonymous ftp at ftp://hubble.ifa.hawaii.edu/pub/preprints/plates To appear in the October 1995 Astronomical Journa

Sending multiple RTP streams in a single RTP session

This memo expands and clarifies the behavior of Real-time Transport Protocol (RTP) endpoints that use multiple synchronization sources (SSRCs). This occurs, for example, when an endpoint sends multiple RTP streams in a single RTP session. This memo updates RFC 3550 with regard to handling multiple SSRCs per endpoint in RTP sessions, with a particular focus on RTP Control Protocol (RTCP) behavior. It also updates RFC 4585 to change and clarify the calculation of the timeout of SSRCs and the inclusion of feedback messages

An Extremely Luminous Galaxy at z=5.74

We report the discovery of an extremely luminous galaxy lying at a redshift of z=5.74, SSA22-HCM1. The object was found in narrowband imaging of the SSA22 field using a 105 Angstrom bandpass filter centered at 8185 Angstroms during the course of the Hawaii narrowband survey using LRIS on the 10 m Keck II Telescope, and was identified by the equivalent width of the emission W_lambda(observed)=175 Angstroms, flux = 1.7 x 10^{-17} erg cm^{-2} s^{-1}). Comparison with broadband colors shows the presence of an extremely strong break (> 4.2 at the 2 sigma level) between the Z band above the line, where the AB magnitude is 25.5, and the R band below, where the object is no longer visible at a 2 sigma upper limit of 27.1 (AB mags). These properties are only consistent with this object's being a high-z Ly alpha emitter. A 10,800 s spectrum obtained with LRIS yields a redshift of 5.74. The object is similar in its continuum shape, line properties, and observed equivalent width to the z=5.60 galaxy, HDF 4-473.0, as recently described by Weymann et al. (1998), but is 2-3 times more luminous in the line and in the red continuum. For H_0 = 65 km s^{-1} Mpc^{-1} and q_0 = (0.02, 0.5) we would require star formation rates of around (40, 7) solar masses per year to produce the UV continuum in the absence of extinction.Comment: 5 pages, 4 figures, Latex with emulateapj style file; to appear in the Astrophysical Journal (Letters

EXERCISE IS MEDICINE® ON CAMPUS: A NATIONAL ANALYSIS AND ASSESSMENT OF COMMUNITY IMPACT

Introduction: The American College of Sports Medicine (ACSM) founded the Exercise is Medicine® on Campus (EIM-OC) initiative, which calls upon colleges and universities to promote physical activity on their campuses. The distribution of EIM-OC programs across the U.S. has not been reported. In addition, the impact that EIM-OC programs have on community-level physical activity prevalence is unknown. The purpose of my thesis was to evaluate and enhance the EIM-OC initiative to promote physical activity and overall health in the U.S. Methods: Recognized EIM-OC programs in the U.S. (n=131) were described based on local, county, state, and regional-level variables. Local variables included recognition level, school population, presence of a kinesiology-related degree, type of on-campus health care services, presence of a medical school on campus, as well as city population. County-level variables included population and designation of metro or non-metro county. The state and ACSM region that the program was in was also collected. Using a cross-sectional study design, physical activity prevalence of 1,296 eligible U.S. counties was predicted by the presence of an EIM-OC program among other health factors using multivariate linear regression. Results: Thirty-seven U.S. states had an EIM-OC program, while 27 states had a gold level program. Eighty-six percent of EIM-OC programs had a kinesiology-related degree program, with 76% of programs having student centered health services. School (p=0.21), city (p=0.14), and county (p=0.32) populations did not differ between recognition levels. Nearly 90% of total and gold EIM-OC programs were in metropolitan counties and 10% were in non-metropolitan counties. Adjusted multivariate regression modelling indicated that bronze (p=0.89), silver (p=0.07), and gold (p=0.67) level EIM-OC programs were not significant predictors of county-level physical activity prevalence. However, when accounting for other health factors (e.g., smoking, education, rurality), the model explained 78% of the variability in county-level physical activity prevalence (pDiscussion:Collectively, these results indicate that colleges and universities of all sizes can use EIM-OC to successfully promote physical activity on their campuses. Further promotion to help increase frequencies of participating EIM-OC campuses in states, regions, and non-metro areas across the U.S. is warranted