We introduce a user-empowered UDP packet reflector to create virtual multicasting environments as an overlay on top of current unicast networks. The end-users’ ability to fully control this environment by a specific communication protocol is the main advantage of our approach. Serializing the parallel communication schema for group communication allows us to introduce special features that are ...

For accurate astronomic and geodetic observations based on radio telescopes, the elevation-dependent deformation of the radio telescopes' main reflectors should be known. Terrestrial laser scanning has been used for determining the corresponding changes of focal lengths and areal reflector deformations at several occasions before. New in this publication is the situation in which we minimize sy...

* [email protected] Abstract The Brazilian Synchrotron Light Laboratory (LNLS) has just constructed and commissioned a 500 MeV booster synchrotron to be used as injector for the 1.37 GeV electron storage ring. The booster has been constructed inside the storage ring, where the constraints in space are very tight. For this reason, the booster dipoles were made as small as possible, i.e., with small cu...

Tetanus booster is a routine procedure of tetanus prevention in populations with high risk of injury, independent of the levels of protection. But the immune response in already protected individuals is not well studied. We describe the kinetics of booster response in individuals by measuring tetanus antitoxin levels by indirect ELISA. A 6-month follow up was performed on 60 boosted individuals...

AIM To identify factors associated with non-uptake of preschool booster immunisation. DESIGN Data from the computerised child health system was used to study all children born in 1990 and living in South Glamorgan, Wales, on their 5th birthday. Factors associated with preschool booster uptake were investigated using multiple logistic regression. RESULTS Preschool booster coverage in the stu...

Sixty elementary schools in Minneapolis were asked to participate in a study to evaluate the most effective education method to increase booster seat knowledge and use in kindergarten-age children. School personnel selected one of the following interventions: (1) written information, (2) parent education class and a free booster seat, or (3) student education and a free booster seat. Twenty sch...

Booster seats protect child occupants between 4 and 8 years of age. The objective of this study was to determine barriers and facilitators for booster seat use among Latino families. We conducted one-to-one elicitation interviews with 56 mothers and 35 fathers of booster-eligible Latino children in an urban county and a rural county in Washington State. Half of the parents did not consistently ...

In a prospective, controlled, randomized, multicenter study the immunogenicity and tolerance of a single vaccination (day 0) and two (day 0, 28) booster vaccinations against diphtheria were compared in subjects who had received their last diphtheria vaccination more than 10 years ago. 415 subjects received the first booster vaccination, and 203 were vaccinated twice. The geometric mean diphther...

The Booster synchrotron at Fermilab employs eighteen 37–53 MHz ferrite-tuned double-gap coaxial radiofrequency cavities for acceleration of protons from 400 MeV to 8 GeV. The cavities have an aperture of 2.25 inches and operate at 55 kV per cavity. Future high duty factor operation of the Booster will be problematic due to unavoidable beam loss at the cavities resulting in excessive activation....