This study investigated the ego development of a group of dropouts who had returned to school. The specific purpose was to explore and evaluate, systematically, the ego development of the former dropouts, and to compare their levels of ego development and their school performance to a group of students who were considered to be at risk to drop out of school. A group of students who were not considered to be at risk to drop out served as a control group. Seventeen high school students served as the subjects in this investigation. The main sources of data were: the results of the Washington University Sentence Completion Test for Ego Development that was developed by Dr. Jane Loevinger, grade and attendance reports, and interviews with the students and their teachers. The findings indicated that while the former dropouts had levels of ego development that were higher than the at risk subjects, the difference was not great enough to be statistically significant. The interviews were examined for indications of the subjects' levels of ego development in the manner in which they spoke about their experiences. The limitations of this investigation are considered, and some suggestions for further research are offered.

Fuel flexibility in gas turbines is of particular importance because of the main fuel source, natural gas. Blends of methane, ethane, and propane are big constituents in natural gas and consequently are of particular interest. With this level of importance comes the need for baseline data such as laminar flame speed of said fuels. While flame speeds at standard temperature and pressure have been extensively studied in the literature, experimental data at turbine-like conditions are still lacking currently. This thesis discusses the theory behind laminar flames; new data acquisition techniques; temperature and pressure capability improvements; measured flame speeds; and a discussion of the results including stability analysis. The measured flame speeds were those of methane, ethane, and propane fuel blends, as well as pure methane, at an elevated pressure of 5 atm and temperatures of 298 and 473 K, using a constant-volume, cylindrical combustion vessel. The current Aramco mechanism developed in conjunction with National University of Ireland Galway compared favorably with the data, while the literature data showed discrepancies at stoichiometric to rich conditions. An in-depth flame speed uncertainty analysis yielded a wide range of values from 0.5 cm/s to 21.5 cm/s. It is well known that high-pressure experiments develop flame instabilities when air is used as the oxidizer. In this study, the hydrodynamic instabilities were restrained by using a high diluent-to-oxygen ratio. The thermal-diffusive instabilities were inhibited by using helium as the diluent. To characterize this flame stability, the Markstein length and Lewis number were calculated for the presented conditions. The resultant positive Markstein lengths showed a low propensity of flame speed to flame stretch, while the larger-than-unity Lewis numbers showed the relatively higher diffusivity of helium to that of nitrogen.

The high speed deformation behavior of a commercially available dual phase (DP) steel was studied by means of split Hopkinson bar apparatus in shear punch (25m/s) and tension (1000s-1) modes with an emphasis on the influence of microstructure. The cold rolled sheet material was subjected to a variety of heat treatment conditions to produce several different microstructures, namely ferrite plus pearlite, ferrite plus bainite and/or acicular ferrite, ferrite plus bainite and martensite, and ferrite plus different fractions of martensite. Static properties (0.01mm/s for shear punch and 0.001s -1 for tension) of all the microstructures were also measured by an MTS hydraulic machine and compared to the dynamic properties. The effects of low temperature tempering and bake hardening were investigated for some ferrite plus martensite microstructures. In addition, two other materials, composition designed as high strength low alloy (HSLA) steel and transformation induced plasticity (TRIP) steel, were heat treated and tested to study the effect of alloy chemistry on the microstructure and property relationship. / A strong effect of microstructure on both static and dynamic properties and on the relationship between static and dynamic properties was observed. According to the variation of dynamic factor with static strength, three groups of microstructures with three distinct behaviors were identified, i.e. classic dual phase (ferrite plus less than 50% martensite), martensite-matrix dual phase (ferrite plus more than 50% martensite), and non-dual phase (ferrite plus non-martensite). Under the same static strength level, the dual phase microstructure was found to absorb more dynamic energy than other microstructures. It was also observed that the general dependence of microstructure on static and dynamic property relationship was not strongly influenced by chemical composition, except the ferrite plus martensite microstructures generated by the TRIP chemistry, which exhibited much better dynamic factor values. This may suggest that solid solution strengthening should be more utilized in the design of crashworthy dual phase steels.

Typescript. / Thesis (Ed. D.)--University of Hawaii at Manoa, 1990. / Includes bibliographical references (leaves 164-170) / Microfiche. / xiv, 170 leaves, bound ill. 29 cm

Thesis (Ed. D.)--University of South Carolina, 2006. / Includes bibliographical references (leaves 176-186). Also available online (PDF file) by a subscription to the set or by purchasing the individual file.

Thesis (Ed. D.)--University of South Carolina, 2006. / Includes bibliographical references (leaves 176-186).

Thesis (M.S.)--Rochester Institute of Technology, 2007. / Typescript. Includes bibliographical references (leaves 58-60).

Thesis (Ph.D.)--Tufts University, 1989. / Submitted to the Dept. of Physics. Includes bibliographical references (leaves 192-204). Access restricted to members of the Tufts University community. Also available via the World Wide Web;

Thesis (Ph. D.)--Ohio State University, 2007. / Title from first page of PDF file. Includes bibliographical references (p. 185-190).

Thesis (M.A.)--University of Toronto, 2006. / Source: Masters Abstracts International, Volume: 44-06, page: 2534. Includes bibliographical references (leaves 109-114).