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Recombination In Kr^34+ + H2 And 0^6+ + He Collisions, Konstantinos Zaharakis
Recombination In Kr^34+ + H2 And 0^6+ + He Collisions, Konstantinos Zaharakis
Dissertations
No abstract provided.
The Separation Of Aqueous Iron Species Found In Stepwise Complexation By Capillary Electrophoresis With Atomic Absorption Spectroscopy Detection, Robert E. Sutton
The Separation Of Aqueous Iron Species Found In Stepwise Complexation By Capillary Electrophoresis With Atomic Absorption Spectroscopy Detection, Robert E. Sutton
Dissertations
A capillary zone electrophoresis system was interfaced to an atomic absorption spectrom eter to permit the separation and detection o f various species of iron found in step wise complexation in aqueous solutions. The samples were introduced at the anodic end of the column employing the electroosmotic flow to drive all the species to the detector at the cathodic end. Aqueous solutions of iron(II) and iron (III) chloride salts were among the compounds studied. The buffer employed w as a 20 millimolar (2-[N-morpholino]ethanesulfonic acid adjusted to a pH of 6 with 6 .6 millimolar potassium hydroxide. The detection limit was …
College Physics Students' Conceptual Understanding Of Area And Volume, And Relationships Between These Concepts And Students' Understanding Of Physics Concepts, Jiang Yu
Dissertations
Concepts such as area and volume are foundational ideas for many concepts introduced in introductory science courses. At the college level, most instructors typically assume that incoming students have already developed an understanding of these underpinning ideas. However, doubt has surfaced in recent years about students' depth of understanding and mastery of these fundamental concepts. Because deficiencies in understanding basic concepts may relate to the learning of subsequent concepts, instructors have expressed concerns about students' understanding of fundamental ideas and if the failure to understand these ideas hinders students' subsequent progress.
This study was designed to (a) investigate the nature …
The Use Of Analogies In An Industrial Environment To Facilitate Status Changes For Radiation Science Concepts, Charles Thomas Lohrke
The Use Of Analogies In An Industrial Environment To Facilitate Status Changes For Radiation Science Concepts, Charles Thomas Lohrke
Dissertations
The focus of this study was the effect of two analogies on the status of industrial technical center employees for three radiation science concept areas. The analogies used were of melting ice and falling tacks. The three radiation concept areas examined were radioactive material decay, radioactive material half-life, and radioactive material activity.
Forty-four adults participated in the study. Thirty-five of these participants took pre- and post-lesson multiple-choice tests to determine the effect that the analogies had on their intelligibility of the three radiation science concept areas. Nine participants also took pre- and post-lesson clinical interviews to assess their intelligibility, plausibility, …
Asymptotic Diagonalizations Of A Linear Ordinary Differential System, Feipeng Xie
Asymptotic Diagonalizations Of A Linear Ordinary Differential System, Feipeng Xie
Dissertations
No abstract provided.
Probability Polynomials For Cubic Graphs In The Framework Of Random Topological Graph Theory, Esther Joy Tesar
Probability Polynomials For Cubic Graphs In The Framework Of Random Topological Graph Theory, Esther Joy Tesar
Dissertations
Topological graph theorists study the imbeddings of graphs on surfaces (spheres with handles). Some interesting questions in the field are on w hat surfaces can a graph be 2 -cell imbedded and how m any such imbeddings are there on each surface. The study of these and related questions is called Enumerative Topological Graph Theory. Random Topological Graph Theory uses probability models to study the 2-cell imbeddings. It generalizes the results from Enumerative Topological Graph Theory (which is the uniform case, p= 1/2) to an arbitrary probability p.
We study the model where the sample space consists of all labeled, …
Step Domination In Graphs, Kelly Lynne Schultz
Step Domination In Graphs, Kelly Lynne Schultz
Dissertations
One of the major areas in Graph Theory is domination in graphs. It is this area with which this dissertation deals, with the primary emphasis on step domination in graphs.
In Chapter 1 we present some preliminary definitions and examples. In addition, a background of the area of domination is presented. We then introduce the concepts that lead to step domination.
In Chapter II we formally define the concept of step domination and give several examples. We determine the minimum number of vertices needed in a step domination set for many classes of graphs. We then explore step domination for …
A Wellhead Protection Study Of A Small Agricultural Community In Glaciated Terrain, As A Model For Wellhead Protection Efforts By Similar Communities, Cole Kevan Lovett
A Wellhead Protection Study Of A Small Agricultural Community In Glaciated Terrain, As A Model For Wellhead Protection Efforts By Similar Communities, Cole Kevan Lovett
Dissertations
The purpose of this study was to create a wellhead protection approach for a small town in a rural watershed that could be used by other, similar, communities.
Lacustrine clay and melt-out till interbedded in outwash sands and fine gravel, separate an unconfined aquifer from a deeper aquifer. The lower aquifer was determined to be semiconfined due to (a) high vertical conductivity, (b) lack of continuity in the clay/till, (c) absence of significant seasonal water level changes, and (d) tritium levels above 1-2 tritium units in deep wells.
Tritium level falls and water age rises along flowpaths. A low-high-low pattern …
Efficient Dominating Sets In Oriented Trees, Quan Yue
Efficient Dominating Sets In Oriented Trees, Quan Yue
Dissertations
No abstract provided.
Semi-Strongly Regular Graphs And Generalized Cages, Cong Fan
Semi-Strongly Regular Graphs And Generalized Cages, Cong Fan
Dissertations
Two well-known classes of graphs, strongly regular graphs and cages, have been studied extensively by many researchers for a long period of time. In this dissertation, we mainly deal with semi-strongly regular graphs, a class of graphs including all strongly regular graphs, and (r, g, t)-cages, a generalization of the usual cage concept.
Chapter I introduces the two new concepts: semi-strongly regular graphs and generalized (r, g, t)-cages, gives necessary conditions for the existence of semi-strongly regular graphs and some interesting properties regarding common neighbors of pairs of vertices, and shows connections between these two new concepts and the old …