Evidence for Electroweak Production of W±W±jj in Proton-Proton Collisions at vs = 8 TeV with the ATLAS Detector at the LHC.

This thesis presents the first study of the same-electric-charge WWjj production using 20.3/fb of proton-proton collision data at a center-of-mass energy of 8 TeV recorded by the ATLAS detector at the LHC during the year of 2012. Only the leptonic decays of both W's are considered. Events are selected with two same-electric-charge leptons (ee, emu, mumu) and at least two hadronic jets. The inclusive and electroweak productions of WWjj are studied in two fiducial signal regions and the production cross sections are measured. First evidence for inclusive and electroweak production is observed with a significance of 4.5 and 3.6 standard deviations respectively. The measured production cross sections are in agreement with the Standard Model predictions. First set of constraints on the anomalous WWWW quartic gauge couplings are derived.PhDPhysicsUniversity of Michigan, Horace H. Rackham School of Graduate Studieshttp://deepblue.lib.umich.edu/bitstream/2027.42/111502/1/liululu_1.pd

Application of Cooperative Principle and Politeness Principle in Class Question-answer Process

Question-answer method of teaching is one of the common ways of classroom interaction and it is also a bridge of communication and cooperation between teachers and students. Teachers can check and know students’ understanding of the knowledge and guide students to think of problems activity by asking questions. The paper is justified by correlational theories of Cooperative Principle and Politeness Principle. Research method of literature is conducted. That is, teachers should pay attention to the way and method of asking questions in class question-answer process, who express to euphemism and accurate as soon as possible and give affirmation and encouragement for students answer to improve the amount of language output. The teachers should be skillful in using of the major principles of Cooperative Principle and Politeness Principle in the English Classroom quiz. These theories not only help to establish a harmonious teacher-students relationship, but also improve the effect of classroom teaching

A supportive environment for the management of software testing

This dissertation describes research undertaken on the management of software testing. A support environment for the management of software testing, entitled SEMST, is presented. The research approach involves the investigation of software configuration management and its application to the testing process; the study of software testing techniques and methods; the exploration of the significance of software testing management; a survey of related work; the development and analysis of the requirements for SEMST; its implementation and an assessment. The current version of SEMST is a prototype built on the top of Unix and RCS on a Sun workstation. It is able to maintain all versions of specifications, test cases and programs, as well as to manage the relationships between these components

Absolute Position Total Internal Reflection Microscopy with an Optical Tweezer

A non-invasive, in-situ calibration method for Total Internal Reflection Microscopy (TIRM) based on optical tweezing is presented which greatly expands the capabilities of this technique. We show that by making only simple modifications to the basic TIRM sensing setup and procedure, a probe particle's absolute position relative to a dielectric interface may be known with better than 10 nm precision out to a distance greater than 1 $\mu$m from the surface. This represents an approximate 10x improvement in error and 3x improvement in measurement range over conventional TIRM methods. The technique's advantage is in the direct measurement of the probe particle's scattering intensity vs. height profile in-situ, rather than relying on calculations or inexact system analogs for calibration. To demonstrate the improved versatility of the TIRM method in terms of tunability, precision, and range, we show our results for the hindered near-wall diffusion coefficient for a spherical dielectric particle.Comment: 10 pages. Submitted for peer review 8/20/201

Essays on Health, Entrepreneurship, and the Labor Market

My dissertation is at the intersection of health economics, development economics, and labor economics, with an emphasis on the labor market impact of health interventions and healthcare policies. The first chapter explores the effect of hypertension control on annual income using data from a randomized controlled trial conducted in rural China. Utilizing the exposure to the interventions as an instrumental variable for blood pressure levels, we found that a one standard deviation decrease in systolic blood pressure can significantly increase annual income by 4.8%. The second chapter investigates the impact of health insurance on entrepreneurs and estimates the alleviation of job lock following a 2009 nationwide healthcare reform---the Urban Resident Basic Medical Insurance (URBMI) program. Using 2000-2011 data from the China Health and Nutrition Survey and a difference-in-differences approach with propensity score weighting, we find that URBMI increases self-employment rate by 5.4% for the overall population. The third chapter analyzes the effect of a major policy change in China---the 2007 Property Rights Law that improved the access to credit. I found evidence that the 2007 Property Rights Law promotes entrepreneurship as measured by the number of owner-mangers in the economy, but has little impact on necessity entrepreneurs