Measurement of the Charged Multiplicities in b, c and Light Quark Events from Z0 Decays

Average charged multiplicities have been measured separately in $b$, $c$ and light quark ($u,d,s$) events from $Z^0$ decays measured in the SLD experiment. Impact parameters of charged tracks were used to select enriched samples of $b$ and light quark events, and reconstructed charmed mesons were used to select $c$ quark events. We measured the charged multiplicities: $\bar{n}_{uds} = 20.21 \pm 0.10 (\rm{stat.})\pm 0.22(\rm{syst.})$, $\bar{n}_{c} = 21.28 \pm 0.46(\rm{stat.}) ^{+0.41}_{-0.36}(\rm{syst.})$ $\bar{n}_{b} = 23.14 \pm 0.10(\rm{stat.}) ^{+0.38}_{-0.37}(\rm{syst.})$, from which we derived the differences between the total average charged multiplicities of $c$ or $b$ quark events and light quark events: $\Delta \bar{n}_c = 1.07 \pm 0.47(\rm{stat.})^{+0.36}_{-0.30}(\rm{syst.})$ and $\Delta \bar{n}_b = 2.93 \pm 0.14(\rm{stat.})^{+0.30}_{-0.29}(\rm{syst.})$. We compared these measurements with those at lower center-of-mass energies and with perturbative QCD predictions. These combined results are in agreement with the QCD expectations and disfavor the hypothesis of flavor-independent fragmentation.Comment: 19 pages LaTex, 4 EPS figures, to appear in Physics Letters

Local voices, 'talkback' and commercial regional FM radio

Ames, KR ORCiD: 0000-0002-1819-8137Commercial FM stations in Rockhampton, Sea FM and Hot FM, have been operating in the city since late 2000. Previously owned by competing networks (Sea FM by RG Capital Radio and Hot FM by DMG), they are both now owned by Macquarie Regional Radioworks. The push for listeners has always been through the station’s breakfast programs.Traditionally, commercial FM breakfast slots have been marked by comedy of humour-oriented teams. Interaction with these teams in a metropolitan environment has not been studied academically, but studies of interaction between listeners and presenters of breakfast programs in the Rockhampton and Gladstone region reveal that talkback in a traditional sense has emerged as a vital component of the program, at times focusing on serious local issues.This paper reveals the results of analysis of interaction between listeners and breakfast presenters on Hot FM and Sea FM. It reveals that the commercial FM stations provide an important opportunity for locals to voice their opinions on local issues in a format generally renowned for its light hearted approach to engaging listeners. Where previously ‘talkback’ has been associated with ABC and commercial AM stations, this paper will consider definitions of talkback in terms of their application in a regional setting, and reveals the popularity of the format for a demographic previously ignored in the Central Queensland media landscape

The 2006 NESCent phyloinformatics hackathon: A field report

10.1177/117693430700300016Evolutionary Bioinformatics3287-29