Skeletal maturity of the hand and wrist (Tanner-Whitehouse II system) was assessed in a sample of 394 school children 5 to 18 years of age, in the city of Oaxaca, Mexico. The socio-economic ...background of the sample was relatively poor and the group appeared to have a poor nutritional history (via height and weight measurements). At most ages, the mean skeletal ages of Oaxaca school children are below the British means, and about 60 per cent of the children have skeletal ages below their chronological ages.
International Telemetering Conference Proceedings / October 30-November 02, 1995 / Riviera Hotel, Las Vegas, Nevada
The Extreme Ultraviolet Explorer (EUVE) satellite was designed to operate with the
...Tracking and Data Relay Satellite System (TDRSS) and Deep Space Network (DSN).
NASA, the Jet Propulsion Laboratory and the Center for EUV Astrophysics have been
evaluating a commercially available ground station already used for NASA's Low
Earth Orbit (LEO) weather satellites. This ground station will be used in a network of
unattended, autonomous ground stations for telemetry reception, processing, and
routing of data over a commercial, secure data line. Plans call for EUVE to be the
initial network user. This network will be designed to support many TDRSS/DSN
compatible missions. It will open an era of commercial, low-cost, autonomous ground
station networks. The network will be capable of supporting current and future NASA
scientific missions, and NASA's LEO and geostationary weather satellites.
Additionally, it could support future, commercial communication satellites in low, and
possibly medium, Earth orbit. The combination of an autonomous ground station and
an autonomous telemetry monitoring system will allow reduction in personnel. The
EUVE Science Operations Center has already reduced console work from three shifts
to one by use of autonomous telemetry monitoring software.
International Telemetering Conference Proceedings / October 30-November 02, 1995 / Riviera Hotel, Las Vegas, Nevada
The UC Berkeley Extreme Ultraviolet Explorer (EUVE) Science Operations Center
...(ESOC) is developing and implementing knowledge-based software to automate the
monitoring of satellite payload telemetry. Formerly, EUVE science payload data were
received, archived, interpreted, and responded to during round-the-clock monitoring
by human operators. Now, knowledge-based software will support, augment, and
supplement human intervention. In response to and as a result of this re-engineering
project, the creation, storage, revision, and communication of information (the
information flow process) within the ESOC has been redesigned. We review the
information flow process within the ESOC before, during, and after the re-engineering
of telemetry monitoring. We identify six fundamental challenges we face in modifying
the information flow process. (These modifications are necessary because of the shift
from continuous human monitoring to a knowledge-based autonomous monitoring
system with intermittent human response.) We describe the innovations we have
implemented in the ESOC information systems, including innovations in each part of
the information flow process for short-term or dynamic information (which changes or
updates within a week) as well as for long-term or static information (which is valid
for more than a week). We discuss our phased approach to these innovations, in which
modifications were made in small increments and the lessons learned at each step
were incorporated into subsequent modifications. We analyze some mistakes and
present lessons learned from our experience.
We present the first detailed extreme photometric observations of a magnetic cataclysmic variable. Our two Extreme Ultraviolet Explorer (EUVE) observations of the AM Her star RE 1149 + 28 were ...obtained about 1 yr apart and show light-curve variations on orbital to yearly timescales, as well as long-term mean flux level changes of a factor of 2. The photometric data show a persistent ingress EUV enhancement which lasts approximately 0.04 in phase. We attribute this to a region of approximately 10(exp 3) km in extent at the accretion impact site, on or very near the surface of the white dwarf primary. Our observations of RE 1149 are consistent with a relatively low system inclination and provide a best-fit orbital period of 90.14 +/- 0.015 minutes.
