A Measurement of the Ratio of the W + 1 Jet to Z + 1 Jet Cross Sections with ATLAS

The measurement of hadronic activity recoiling against W and Z vector bosons provides an important test of perturbative QCD, as well as a method of searching for new physics in a model independent fashion. We present a study of the cross-section ratio for the production of W and Z gauge bosons in association with exactly one jet Rjet = {\sigma}(W + 1jet)/{\sigma}(Z + 1jet), in pp collisions at \surds = 7 TeV. The study is performed in the electron and muon channels with data collected with the ATLAS detector at the LHC. The ratio Rjet is studied as a function of the cumulative transverse momentum distribution of the jet. This result can be compared to NLO pQCD calculations and the prediction from LO matrix element + parton shower generators.Comment: 8 pages, 4 figures, conference proceedings for DPF 201

An Exploratory Investigation of a Flipped Classroom Model in Human Services Education

Human services education has unique needs due to the practical elements that are a part of preparing students for the field. One aspect is for students to graduate with a firm capacity to enact the skill detailed by the National Organization of Human Services (NOHS, n.d.). A blending of on-campus and on-line components has been found to encourage higher order thinking and offer experiential learning (Rehfuss, Kirk-Jenkins, & Milliken, 2015). The flipped classroom pedagogical model offers one potential way for educators to create an environment that facilitates the learning needed and recommended. This study altered a class to the flipped classroom model, and then used two type of data collection, a survey given twice during a semester and reflections written as a part of the class’ expectation. This was done to explore human services undergraduates’ reactions to the pedagogical model. Implications and lines of further enquiry are included

Development of the technology for the fabrication of reliable laminar from control panels

Materials were assessed and fabrication techniques were developed for use in the manufacture of wing surface materials compatible with the application of both aluminum alloys and nonmetallic composites. The concepts investigated included perforations and slots in the metallic test panels and microporosity and perforations in the composite test panels. Perforations were produced in the metallic test panels by the electron beam process and slots were developed by controlled gaps between the metal sheets. Microporosity was produced in the composite test panels by the resin bleed process, and perforations were produced by the fugitive fiber technique. Each of these concepts was fabricated into test panels, and air flow tests were conducted on the panels

Migrant workers and human resource development practices in the hotel sector: a case of Cyprus

Purpose: This paper aims to investigate the human resource development (HRD) practices amongst migrant workers using a cross-national survey. The literature review has shown that there is a need to provide a comprehensive understanding of the significance of HRD in the hotel sector and its role in developing migrant workers skills. Moreover, hotels that have training and development opportunities tend to support their employees in training their people-to-people and other soft skills. Design/methodology/approach: This study adopted a quantitative approach using a self-administered questionnaire, employing a purposive sampling strategy to target key participants (hotel managers/supervisor/owners) across Cyprus. Findings: The findings show that most hotels only provide operational, informal level training to all their migrant workers. The key findings present a sector that currently does not plan for sustainable HRD practices and learning with casualisation being the dominant strategy to cope with changing demand for labour. Those few hotels that do have long-term HRD practices have seen an impact on their organisational performance as well as increased migrant workers skills. Practical implications: In practice, Cypriot hotels need to focus their attention on their long-term strategic goals. The development of their migrant employees may help enhance organisational performance in the long-term. However, further research is needed to explore current perceptions amongst migrant workers and how they perceive their long-term role in the industry. Originality/value: This paper contributes to the existing HRD literature since the training and development of migrant employees in Cypriot hotels have not been researched during the recession. HRD insights will enable policy makers and employers to improve current training infrastructure for migrant workers and add to the debate around the importance of HRD strategy in advancing organisational performance in such a transformational business environment

Edge-Driven Mechanical Microplate Models of Strike-Slip Faulting in the Tibetan Plateau

The India-Asia collision zone accommodates the relative motion between India and Eurasia through both shortening and pervasive strike-slip faulting. To gain a mechanical understanding of how fault slip rates are driven across the Tibetan plateau, we develop a two-dimensional, linear elastic, two-stage, deformable microplate model for the upper crust based on the behavior of an idealized earthquake cycle. We use this approach to develop a suite of simple India-Asia collision zone models, differing only in boundary conditions, to determine which combination of edge forces and displacements are consistent with both the slip rate measurements along major Tibetan faults as well as the geodetically observed extrusion of crustal material toward Southeast Asia. Model predictions for the Altyn Tagh (1–14 mm/yr), Kunlun (3–10 mm/yr), Karakorum (5–12 mm/yr), and Haiyuan (3–5 mm/yr) faults are in agreement with geologically and geodetically inferred slip rates. Further, models that accurately reproduce observed slip rate gradients along the Altyn Tagh and Kunlun faults feature two critical boundary conditions: (1) oblique compressive displacement along the Himalayan range front west of the Shillong plateau, and (2) forcing in Southeast Asia. Additionally, the ratio of internal-block potency rate to the total potency rate for each microplate ranges from 28% to 79%, suggesting a hybrid view of deformation in Tibet as simultaneously localized on major faults and distributed at length scales <500 km.Earth and Planetary Science

Resonance tunneling of polaritons in 1-D chain with a single defect

We consider propagation of coupled waves (polaritons) formed by a scalar electromagnetic wave and excitations of a finite one dimensional chain of dipoles. It is shown that a microscopic defect (an impurity dipole) embedded in the chain causes resonance tunneling of the electromagnetic wave with the frequency within the forbidden band between two polariton branches. We demonstrate that resonance tunneling occurs due to local polariton states caused by the defect.Comment: 11 pages, 9 figures (PS-format), RevTe

Study of the application of advanced technologies to laminar-flow control systems for subsonic transports. Volume 2: Analyses

For abstract, see N76-24144