Airport Security Checkpoint Screener: An Analytical Study of Job Retention and Attrition Factors

The proposed research seeks to identify the factors contributing to job retention and job attrition in terms of why an airport security checkpoint screener would try or want to stay on the job or leave the job. By identifying the causes of employee satisfaction and dissatisfaction, and by understanding the integral components of employee turnover can develop appropriate interventions that curb existing retention problems (exceeding 70% annually in most facilities). Aside from the obvious costs affiliated with recruiting, selecting, and training replacement employees, there is likely to be a detrimental impact on the effectiveness of airline passenger screening when a substantial percentage of the workforce are novice workers. The success and deterrent potential of an airport security checkpoint is primarily dependent on the personnel who operate it. As with most safety-critical systems, there is no room for system-induced or operator-induced errors. To date there has been little emphasis placed on the selection of airport security checkpoint sreeners. In a report by the 1989 Presidents Commission on Aviation Security and Terrorism (Presidents Commission, 1990), the commission was critical toward the Federal Aviation Administration with regard to how little attention was paid on recruiting and motivating security personnel. The significance of the work has many dementions to it. Ideas and conclusions formulated from these concerns and issues are essential in addressing the empirical attention needed in this area. They also carry strong implications toward the standardization of screening and hiring of airport security checkpoint screeners and towards the development of a standardized protocol that can be applied industry-wide

Search for dark matter produced in association with bottom or top quarks in √s = 13 TeV pp collisions with the ATLAS detector

A search for weakly interacting massive particle dark matter produced in association with bottom or top quarks is presented. Final states containing third-generation quarks and miss- ing transverse momentum are considered. The analysis uses 36.1 fb−1 of proton–proton collision data recorded by the ATLAS experiment at √s = 13 TeV in 2015 and 2016. No significant excess of events above the estimated backgrounds is observed. The results are in- terpreted in the framework of simplified models of spin-0 dark-matter mediators. For colour- neutral spin-0 mediators produced in association with top quarks and decaying into a pair of dark-matter particles, mediator masses below 50 GeV are excluded assuming a dark-matter candidate mass of 1 GeV and unitary couplings. For scalar and pseudoscalar mediators produced in association with bottom quarks, the search sets limits on the production cross- section of 300 times the predicted rate for mediators with masses between 10 and 50 GeV and assuming a dark-matter mass of 1 GeV and unitary coupling. Constraints on colour- charged scalar simplified models are also presented. Assuming a dark-matter particle mass of 35 GeV, mediator particles with mass below 1.1 TeV are excluded for couplings yielding a dark-matter relic density consistent with measurements

Determination of the strong coupling constant αs from transverse energy–energy correlations in multijet events at s√=8 TeV using the ATLAS detector

Measurements of transverse energy–energy correlations and their associated asymmetries in multi-jet events using the ATLAS detector at the LHC are presented. The data used correspond to s√=8 TeV proton–proton collisions with an integrated luminosity of 20.2 fb−1 . The results are presented in bins of the scalar sum of the transverse momenta of the two leading jets, unfolded to the particle level and compared to the predictions from Monte Carlo simulations. A comparison with next-to-leading-order perturbative QCD is also performed, showing excellent agreement within the uncertainties. From this comparison, the value of the strong coupling constant is extracted for different energy regimes, thus testing the running of αs(μ) predicted in QCD up to scales over 1 TeV . A global fit to the transverse energy–energy correlation distributions yields αs(mZ)=0.1162±0.0011(exp.) +0.0084−0.0070(theo.) , while a global fit to the asymmetry distributions yields a value of αs(mZ)=0.1196±0.0013(exp.) +0.0075−0.0045(theo.)