On List-Coloring and the Sum List Chromatic Number of Graphs.

This thesis explores several of the major results in list-coloring in an expository fashion. As a specialization of list coloring, the sum list chromatic number is explored in detail. Ultimately, the thesis is designed to motivate the discussion of coloring problems and, hopefully, interest the reader in the branch of coloring problems in graph theory

Rockwall To Royse City Pipeline Route Rockwall County, Texas

North Texas Municipal Water District is proposing to construct a 3.05- mile-long pipeline and a storage tank area (measuring up to 4.7 acres) in Rockwall County, Texas. The combination of permanent and temporary easements varies along the route but they are never wider than 70 ft combined. AR Consultants, Inc. (ARC) was contracted to survey the route and conducted the survey March 17 and 26, 2015. No prehistoric archaeological sites were found during the survey. This follows the predictions made prior to field work which were based on the project area’s location in the upper reaches of the Camp Creek Watershed. One historic farmstead site (41RW30) was recorded. This site consists of a well/cistern at a location of a mapped structure on maps dating to the 1920s through the 1970s. However, no structure remains and the only intact feature is the well/cistern. Additionally, the artifacts recovered are indicative of an early to mid-20th century residence and the site lacks overall integrity. Given the results of this survey, AR Consultants, Inc. recommends that further cultural resource investigations are unnecessary for this project, and requests that the Texas Historical Commission concur with this recommendation

An Archaeological Survey of the Proposed Fannin County Bridge Study Areas Fannin County, Texas

North Texas Municipal Water District (NTMWD) is proposing to construct the Lower Bois d’Arc Creek Reservoir in northeast Fannin County, Texas. Due to the proposed inundation, nine bridge/culvert locations will be inundated, and new bridges/culverts will be constructed. White Hawk, which is handling the engineering for the project, contracted with AR Consultants, Inc. to evaluate the proposed bridge locations to determine if significant cultural resources are within the study areas. Prior to and during the cultural resources survey, it was thought that 11 locations would be impacted and 11 were surveyed. After the survey was complete, it was determined that locations 4A and 8 would not be impacted by this project. Even so, the survey results for these two locations is included in this report. All road improvements and new construction will take place within a study area that can vary from 140 to 300 feet wide. In total, 112.11 acres were surveyed. The routes were surveyed on August 29-31, 2016, January 30-February 2, and May 11 2017. During the survey, four historic sites (41FN253, 41FN255, 41FN256 and 41FN257) and one site (41FN254) with historic and prehistoric components were recorded. No historic artifacts were collected; prehistoric artifacts and notes from these sites will be curated at the Texas Archeological Research Laboratory at the University of Texas in Austin. As land access on private land was only granted within the easement, the sites on private land could only be fully defined, recorded, and evaluated within these corridors. Sites found on land owned by NTMWD were recorded fully. Because of this, site 41FN257, which sits on private land, was not fully recorded. Therefore, only the portion of the site within the project area can be evaluated, and site 41FN257 is recommended not eligible for inclusion on the National Register of Historic Places or as a State Antiquities Landmark. Sites 41FN253, 41FN254, 41FN255, and 41FN256, which were recorded fully, are also recommended not eligible for inclusion on the National Register of Historic Places or as State Antiquities Landmark. Given the results of this survey, AR Consultants, Inc. recommends that further cultural resource investigations are unnecessary for this project, and requests that the Texas Historical Commission concur with this recommendation

A Geometry of the Generations

We propose a geometric theory of flavor based on the discrete group $(S_3)^3$, in the context of the minimal supersymmetric standard model. The group treats three objects symmetrically, while making fundamental distinctions between the generations. The top quark is the only heavy quark in the symmetry limit, and the first and second generation squarks are degenerate. The hierarchical nature of Yukawa matrices is a consequence of a sequential breaking of $(S_3)^3$.Comment: 10 pages, 1 EPS figure as uuencoded tar-compressed file, uses psfig.st

Dreamkeeper: 3D Game Using Unreal Engine 4

The goal of this senior project was to combine our diverse skills to make a 3D game. The plot involves a young girl who has been given the powers to enter dreams and defeat nightmares. The 3D assets that we built and animated were made in Autodesk Maya. We used Unreal Engine 4 to piece together our assets and create the logic for the game. This document explains the technologies that we used, design choices we made, feedback from our player-testing, and work that we want to complete for the project in the future. Our final game demo features two levels, a combat systems that allows played to level up skills, and puzzles that allow the player to proceed to the final battle

Gender and educational leadership in England: a comparison of secondary headteachers' views over time

In the context of gender being a barrier to accessing leadership, this paper presents a comparison of the views of men and women head teacher (principals) of secondary schools in England in the 1990s and in 2004. The same survey instrument was used on both occasions. The perceptions of the head teachers show change in some areas and no change in others. Overall, women are more likely to become head teachers and are now less likely to be categorised into pastoral roles, but in some cases women still meet prejudice from governors and others in the wider community. Women head teachers are more likely to have partners and children than in the 1990s, sharing equally or carrying most of the domestic responsibilities, whereas male colleagues are most likely to have partners who take the majority of responsibility in the home. Essentialist stereotypes about women and men as leaders still prevail, although both the women and men head teachers see themselves as adopting a traditionally ‘feminine’ style of leadership. Women head teachers are likely to see some benefits in being a woman in a role stereotypically associated with men. However, there has been an increase in the proportion of women who feel that they have to prove their worth as a leader, and this may be linked with increased levels of accountability in schools

A Simple and Realistic Model of Supersymmetry Breaking

We present a simple and realistic model of supersymmetry breaking. In addition to the minimal supersymmetric standard model, we only introduce a hidden sector gauge group SU(5) and three fields X, F and \bar{F}. Supersymmetry is broken at a local minimum of the potential, and its effects are transmitted to the supersymmetric standard model sector through both standard model gauge loops and local operators suppressed by the cutoff scale, which is taken to be the unification scale. The form of the local operators is controlled by a U(1) symmetry. The generated supersymmetry breaking and mu parameters are comparable in size, and no flavor or CP violating terms arise. The spectrum of the first two generation superparticles is that of minimal gauge mediation with the number of messengers N_mess = 5 and the messenger scale 10^11 GeV < M_mess < 10^13 GeV. The spectrum of the Higgs bosons and third generation superparticles, however, can deviate from it. The lightest supersymmetric particle is the gravitino with a mass of order (1-10) GeV.Comment: 19 pages, version to appear in Phys. Lett.

Discrete Symmetries from Broken SU(N)SU(N) and the MSSM

In order that discrete symmetries should not be violated by gravitational effects, it is necessary to gauge them. In this paper we discuss the gauging of $\Z_N$ from the breaking of a high energy $SU(N)$ gauge symmetry, and derive consistency conditions for the resulting discrete symmetry fr om the requirement of anomaly cancellation in the parent symmetry. These results are then applied to a detailed analysis of the possible discrete symmetries forbidding proton decay in the minimal supersymmetric standard model.Comment: 14 pages, plain TEX, computer problems fixed since first versio