Productivity of a Tree-Length Forwarder for Logging on Wet Sites

A GEMCO tree-length forwarder was used to harvest pine from wet sites. It produced payloads of 26.9 metric tonnes with an average cycle time of 72 minutes. Hourly production averaged 32.9 metric tonnes per PMH while addition of the forwarder and a second loader to the system increased system cost by US$ 67.97/PMH. Use of the forwarder was less expensive than building all-weather roads to harvest timber in wet weather where volume accessed was relatively low or an extensive road network was required

Search for narrow resonances using the dijet mass spectrum in pp collisions at s√=8 TeV

Results are presented of a search for the production of new particles decaying to pairs of partons (quarks, antiquarks, or gluons), in the dijet mass spectrum in proton-proton collisions at s√=8  TeV. The data sample corresponds to an integrated luminosity of 4.0  fb−1, collected with the CMS detector at the LHC in 2012. No significant evidence for narrow resonance production is observed. Upper limits are set at the 95% confidence level on the production cross section of hypothetical new particles decaying to quark-quark, quark-gluon, or gluon-gluon final states. These limits are then translated into lower limits on the masses of new resonances in specific scenarios of physics beyond the standard model. The limits reach up to 4.8 TeV, depending on the model, and extend previous exclusions from similar searches performed at lower collision energies. For the first time mass limits are set for the Randall–Sundrum graviton model in the dijet channel