Numerical and Experimental Investigation of Dam-Break Wave on a Single Building Situated Downstream

Dam-break flow may cause severe damages on land and population locateddownstream due to flush flooding. In addition to the complexity inherent in dam break flow,existence of buildings changes the rapidly varying flow pattern downstream making theproblem more complex. The way the buildings are oriented and clustered has a great influenceon water depths and velocities of the dam-break flow. To understand the phenomena better, inthis study, the flow around a single building located vertically and excentred with respect tothe main flow direction are investigated experimentally and numerically. The wavepropagation and its interaction with the building was observed using high speed camera andobtained results were compared with FLOW-3D numerical model which uses 3D RANSequations utilizing k - turbulence model. The results were in good agreement

The effect of shoulder injury prevention program on glenohumeral range of motion and upper extremity performance in adolescent throwers: A pilot study

Background: The Oslo Sports Trauma Research Center (OSTRC) Shoulder Injury Prevention Program is an exercise program developed to increase the internal rotation (IR) range of motion (ROM), external rotator muscle strength and scapular muscle strength and to improve kinetic chain involvement and thoracic mobility. The purpose of this study is to investigate the effect of this program on glenohumeral ROM and upper extremity functional performance in adolescent throwers. Material and methods: Ten adolescent throwers (discus, shot put and javelin throwers) were involved in the study. The OSTRC Shoulder Injury Prevention Program was applied three times a week for 8 weeks as a part of warm-up. Glenohumeral IR and external rotation (ER) ROM were evaluated with a goniometer. The Closed Kinetic Chain Upper Extremity Stability Test (CKCUEST) was used to evaluate the upper extremity functional performance. Results: It was found that there was a statistically significant difference in the dominant side IR ROM and CKCUEST between the pre-test and post-test (p0.05). Conclusions: This study shows that the glenohumeral IR ROM and upper extremity functional performance increases after the 8-week OSTRC Shoulder Injury Prevention Program. For these purposes, physiotherapists and trainers can include this program in their training programs

Observation of γγ → ττ in proton-proton collisions and limits on the anomalous electromagnetic moments of the τ lepton

The production of a pair of τ leptons via photon–photon fusion, γγ → ττ, is observed for the f irst time in proton–proton collisions, with a significance of 5.3 standard deviations. This observation is based on a data set recorded with the CMS detector at the LHC at a center-of-mass energy of 13 TeV and corresponding to an integrated luminosity of 138 fb−1. Events with a pair of τ leptons produced via photon–photon fusion are selected by requiring them to be back-to-back in the azimuthal direction and to have a minimum number of charged hadrons associated with their production vertex. The τ leptons are reconstructed in their leptonic and hadronic decay modes. The measured fiducial cross section of γγ → ττ is σfid obs = 12.4+3.8 −3.1 fb. Constraints are set on the contributions to the anomalous magnetic moment (aτ) and electric dipole moments (dτ) of the τ lepton originating from potential effects of new physics on the γττ vertex: aτ = 0.0009+0.0032 −0.0031 and |dτ| < 2.9×10−17ecm (95% confidence level), consistent with the standard model