Characteristics of Effective School Principals: A Mixed-Research Study

In this multi-stage mixed analysis study, the views of 615 college students enrolled at two Hispanic-serving institutions in the Southwest were obtained concerning characteristics of effective school principals. Through the method of constant comparison (qualitative phase), 29 dominant themes were determined to be present in respondent-identified characteristics of effective school principals: Leader, Communication, Caring, Understanding, Knowledgeable, Fair, Works Well With Others, Listening, Service, Organized, Disciplinarian, Good Attitude, Patience, Respectful, Helping, Open-Mindedness, Motivating, Professional, Flexible, Being Visible, Honest, Good Role Model, Responsible, Builds Relationships, Involving, Consistent, Friendly, Focus on Schools, and Experience in the Classroom. An exploratory factor analysis revealed that these 29 themes represented five meta-themes. Then these themes (quantitative phase) were converted into numbers (i.e., quantitized) into an interrespondent matrix that consisted of a series of 1s and 0s and were analyzed to determine whether participants’ themes differed as a function of sex, ethnicity, college status, and first-generation/non-first-generation status. Statistically significant differences were present between undergraduate and graduate students, between males and females, between Hispanics and Whites, and between first-generation and non-first-generation college students. Implications are discussed

Search for new phenomena in final states with an energetic jet and large missing transverse momentum in pp collisions at √ s = 8 TeV with the ATLAS detector

Results of a search for new phenomena in final states with an energetic jet and large missing transverse momentum are reported. The search uses 20.3 fb−1 of √ s = 8 TeV data collected in 2012 with the ATLAS detector at the LHC. Events are required to have at least one jet with pT > 120 GeV and no leptons. Nine signal regions are considered with increasing missing transverse momentum requirements between Emiss T > 150 GeV and Emiss T > 700 GeV. Good agreement is observed between the number of events in data and Standard Model expectations. The results are translated into exclusion limits on models with either large extra spatial dimensions, pair production of weakly interacting dark matter candidates, or production of very light gravitinos in a gauge-mediated supersymmetric model. In addition, limits on the production of an invisibly decaying Higgs-like boson leading to similar topologies in the final state are presente

Search for the production of dark matter in association with top-quark pairs in the single-lepton final state in proton-proton collisions at √s=8 TeV

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Multiplicity and rapidity dependence of strange hadron production in pp, pPb, and PbPb collisions at the LHC

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Search for disappearing tracks in proton-proton collisions at √s=8 TeV

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Search for vector-like T quarks decaying to top quarks and Higgs bosons in the all-hadronic channel using jet substructure

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Precise determination of the mass of the Higgs boson and tests of compatibility of its couplings with the standard model predictions using proton collisions at 7 and 8 TeV

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Description and performance of track and primary-vertex reconstruction with the CMS tracker

A description is provided of the software algorithms developed for the CMS tracker both for reconstructing charged-particle trajectories in proton-proton interactions and for using the resulting tracks to estimate the positions of the LHC luminous region and individual primary-interaction vertices. Despite the very hostile environment at the LHC, the performance obtained with these algorithms is found to be excellent. For tbar t events under typical 2011 pileup conditions, the average track-reconstruction efficiency for promptly-produced charged particles with transverse momenta of pT > 0.9GeV is 94% for pseudorapidities of |η| < 0.9 and 85% for 0.9 < |η| < 2.5. The inefficiency is caused mainly by hadrons that undergo nuclear interactions in the tracker material. For isolated muons, the corresponding efficiencies are essentially 100%. For isolated muons of pT = 100GeV emitted at |η| < 1.4, the resolutions are approximately 2.8% in pT, and respectively, 10μm and 30μm in the transverse and longitudinal impact parameters. The position resolution achieved for reconstructed primary vertices that correspond to interesting pp collisions is 10–12μm in each of the three spatial dimensions. The tracking and vertexing software is fast and flexible, and easily adaptable to other functions, such as fast tracking for the trigger, or dedicated tracking for electrons that takes into account bremsstrahlung

Measurement of inclusive jet production and nuclear modifications in pPb collisions at root s(NN)=5.02 TeV

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