418 research outputs found
A response time estimator for police patrol dispatching
No full textIncludes bibliographical references (p. 21).by Christian Schaack, Richard C. Larson
THE EFFECTS OF PLYOMETRIC TRAINING INTERVENTION ON VALGUS AND VARUS KNEE MOVEMENT
No full textM. Schaack, M. Aylward, J. Styner, J. Savage
Lewis-Clark State College, Lewiston, ID
PURPOSE: To determine if a six-week plyometric training intervention would significantly decrease valgus knee movement in post-pubescent, adolescent females. METHODS: Eighteen female subjects, ages 13-17, participated in pre- plyometric training intervention testing consisting of a 5-minute warm-up on a cycle ergometer, followed by 3-max vertical jumps using a Vertec™. Reflective markers were placed on the following right and left anatomical locations: anterior superior iliac spine (ASIS), center of patella, and lateral malleolus of fibula. Both pre- and post-testing max vertical jumps were recorded using a digital camera and analyzed using Kinovea™ software to identify valgus angles. Prior to post-testing, all participants completed a six-week (3 days/week) plyometric intervention program. Throughout training sessions, participants were provided specific coaching cues in order to reduce valgus motion, as well as other incorrect mechanics. Training consisted of similar exercises: depth jumps, jump and reach, power skips. Intensity increased throughout training. Following the six-week plyometric training intervention, participants completed post-testing, consistent with pre-testing methods. Data were analyzed using an alpha value ofp\u3c 0.05. RESULTS: Significant differences were present in valgus knee angles, p= 0.001. Means were calculated for pre- (M = 27.9 degrees) and post- (M = 12.9 degrees) valgus angles. There were no significant differences in participant max vertical jumps ( p= 0.430). Means were calculated for pre- (M = 16.03 inches) and post- (M = 16.67 inches) max vertical jump height. However, 12 of 18 (66.7%) participants increased their vertical jump height. CONCLUSION: The results propose that the plyometric intervention training had a significant decrease on valgus knee angles, but did not significantly increase vertical jump height.
Supported by LCSC Internal Research Grant
Measurement of the ratio of prompt χ c to J / ψ production in pp collisions at √s = 7 TeV
No full textThe prompt production of charmonium χ c and J / ψ states is studied in proton-proton collisions at a centre-of-mass energy of √s = 7 TeV at the Large Hadron Collider. The χ c and J / ψ mesons are identified through their decays χ c → J / ψ γ and J / ψ → μ + μ - using 36 pb - 1 of data collected by the LHCb detector in 2010. The ratio of the prompt production cross-sections for χ c and J / ψ, σ (χ c → J / ψ γ) / σ (J / ψ), is determined as a function of the J / ψ transverse momentum in the range 2 < p T J / ψ < 15 GeV / c. The results are in excellent agreement with next-to-leading order non-relativistic expectations and show a significant discrepancy compared with the colour singlet model prediction at leading order, especially in the low p T J / ψ region
Promising practices for postsecondary STEM grantees
No full textTitle from PDF cover (viewed on August 31, 2017)."Student Capstone Project."This archived document is maintained by the State Library of Oregon as part of the Oregon Documents Depository Program. It is for informational purposes and may not be suitable for legal purposes.Includes bibliographical references (pages 32-35).Mode of access: Internet from the Oregon Government Publications Collection.Text in English
Measurement of the branching fraction
No full textThe B
0
s
→ J/ψK
0
S
branching fraction is measured in a data sample corresponding to 0.41 fb−1
of integrated luminosity collected with the LHCb detector at the LHC. This channel is sensitive to
the penguin contributions affecting the sin 2β measurement from B
0
→ J/ψK
0
S
. The time-integrated
branching fraction is measured to be B(B
0
s
→ J/ψK
0
S
) = (1.83±0.28)×10−5
. This is the most precise
measurement to date
Measurement of the polarization amplitudes and triple product asymmetries in the B0s → Φ Φ decay
No full text<p>Using 1.0 fb−1 of pp collision data collected at a centre-of-mass energy of s√=7 TeV with the LHCb detector, measurements of the polarization amplitudes, strong phase difference and triple product asymmetries in the B0s→ϕϕ decay mode are presented. The measured values are</p>
<p>|A0|2=0.365±0.022(stat)±0.012(syst),|A⊥|2=0.291±0.024(stat)±0.010(syst),cos(δ∥)=−0.844±0.068(stat)±0.029(syst),AU=−0.055±0.036(stat)±0.018(syst),AV=0.010±0.036(stat)±0.018(syst).</p>
Effect of aggregation on chromophore structure in allophycocyanin studied by resonance CARS-spectroscopy
No full textPrompt charm production in pp collisions at √<span style="text-decoration:overline">s</span>=7 TeV
No full textCharm production at the LHC in pp collisions at s√=7 TeV is studied with the LHCb detector. The decays D0→K−π+, D+→K−π+π+, D⁎+→D0(K−π+)π+, D+s→ϕ(K−K+)π+, Λ+c→pK−π+, and their charge conjugates are analysed in a data set corresponding to an integrated luminosity of 15 nb−1. Differential cross-sections dσ/dpT are measured for prompt production of the five charmed hadron species in bins of transverse momentum and rapidity in the region 0<pT<8 GeV/c and 2.0<y<4.5. Theoretical predictions are compared to the measured differential cross-sections. The integrated cross-sections of the charm hadrons are computed in the above pT-y range, and their ratios are reported. A combination of the five integrated cross-section measurements gives
σ(cc¯)pT<8 GeV/c,2.0<y<4.5=1419±12(stat)±116(syst)±65(frag) μb,
where the uncertainties are statistical, systematic, and due to the fragmentation functions
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