Neutral Pion Analysis in Longitudinally Polarized proton+proton Collisions

Beyond the valence quark\u27s spin contribution to the total spin of a proton, gluon and sea quark contributions are becoming clear as well. For proton+proton collisions at a center of mass energy of 510 GeV, neutral pion production is dominated by gluon-gluon and gluon-quark scattering. An avenue to constrain the gluon polarization is the asymmetry, ALL, in the production of neutral pions from collisions of longitudinally spin-polarized proton beams. Our experiment was performed with the STAR detector at the Relativistic Heavy Ion Collider (RHIC), unique for its ability to collide spin-polarized proton beams. The Endcap Electromagnetic Calorimeter (EEMC) of the STAR detector with its pseudorapidity (η) range between 1.09 and 2.00 and full azimuthal coverage measures energies of photons from π0 decays. We consider the invariant mass of all photon pairs in the EEMC as we identify π0 candidates. We will present the current status of the analysis of the π0 ALL as measured by the EEMC at STAR in 2012 data with center-of-mass energy of 510 GeV

A design ideation method for novice designers

Design ideation is a core stage in the design process that begins with a design brief and results in a range of design concepts from which solutions can be selected. The success of design ideation relies upon designers’ creativity and ingenuity. In current practice, design ideation tends to be an ad hoc process which combines the designer’s experience with techniques such as sketching, brainstorming, and mock-up to develop creative solutions in response to the brief. There are notable differences in ideation performance between novice and expert designers in that experts tend to follow a more systematic process, and have more experience and knowledge of previous designs to draw on. Design ideation is more challenging for novice designers who have limited experience on which to draw and no systematic process to follow. This thesis provides a method that enhances the design ideation performance of novice designers by providing a systematic design ideation process for them to follow, and a database and associated visualisation method that gives them access to previous designs. The method was assessed through empirical evaluation experiments conducted with 101 students in the UK and South Korea. This confirmed that the method improves novice designers’ generation of creative solution concepts in response to a design brief. The research makes four contributions. The method, Knowledge-Enabled Design Ideation Method (KEDIM), provides a systematic design ideation process that includes three steps. The first step draws on a Database of Design Cases (DOS) that is supported by a database schema. DOS is a part of the research contribution that provides a structure to capture case data. DOS was validated through population with 540 design cases, and through use in the second stage of KEDIM, Perceptual Mapping Generation Software (PMGS). The core contribution of PMGS is its visualisation method that brings together selected design cases from the database and presents them in a way that enhances novice designers’ abilities to draw analogies. The final contribution is Systematic Brainstorming (SBI), where these analogies are developed through a set of specific ideation themes alongside solution concepts. KEDIM, through these three tools, improves the effectiveness of novice designers ideation by increasing the number of solution concepts generated when compared with students not using KEDIM responding to the same brief

Measurement of the Longitudinal Double-spin Asymmetry for Neutral Pion Production in Polarized Proton Collisions at √s = 510GeV

Abstract is attache

An Experiment in Refactoring an Object Oriented CASE Tool

Colloque avec actes et comité de lecture.This paper describes experience gained and lessons learned from restructuring OODesigner, a Computer Aided Software Engineering (CASE) tool that supports Object Modelling Technique (OMT). This tool supports a wide range of features such as constructing the three models of OMT, managing information repository, documenting class resources, automatically generating C++ and Java code, reverse engineering C++ and Java code, searching and reusing classes in the corresponding repository and collecting metrics data. A version 1.x of OODesigner has been developed for 3 years since 1994. Although this version was developed using OMT (i.e. the tool has been designed using OMT) and C++, we recognized the potential maintenance problems that originated from the ill-designed class architecture. Thus that version was totally restructured, resulting in a new version that is easier to maintain than the old one. In this paper, we briefly describe the tool's functionality, its development process and its refactoring process, emphasizing the fact that the refactoring of the tool is conducted using the tool itself. Then we discuss lesson learned from these processes and we exhibit some comparative measurements of the developed versions

The Medium and the Backlash: The Disparagement of the #MeToo Movement in Online Public Discourse in South Korea

This study examines the #MeToo movement in South Korea to understand the role of online platforms in the development of a backlash discourse. We apply computational methods to analyze how the #MeToo movement was discussed by citizens on Twitter and in online news comments, in contrast to the traditional news media. Our findings show that the public discourse in user-driven online platforms enabled the proliferation of a disparaging narrative that challenged the movement, while the patterns of the backlash differed across platforms. Using word-embedding techniques and network analyses, we illustrate the shift in frames around #MeToo movement and highlight how platform affordances meaningfully shaped the way the backlash unfolded