The spatial and temporal distribution of Methyl Tertiary-Butyl Ether (MTBE) and BTEX (Benzene, Toluene, Ethylbenzene, Xylenes) compounds were assessed in a multipurpose reservoir, Lake Lewisville, Texas between February 1999 and February 2000. Concentrations of MTBE ranged from 0.0 - 16.7 mg/L. Levels of MTBE in the lake were related to watercraft. BTEX concentrations were never detected above 2.0 mg/L during the sampling period. Finished drinking water from Denton and the Upper Trinity Regional Water District (UTRWD) Treatment Plants were also tested for MTBE and BTEX. MTBE and BTEX were not detected in UTRWD water samples. Denton's finished water samples never exceeded 2.2 mg/L for MTBE and BTEX was not detected except for one replicate of 1.1 mg/L toluene.

As a criminal sanction, community service involves unpaid labor on the part of convicted criminal offenders. Community service was created as an alternative to incarceration for low-level offenders. It now appears, however, that community service is rarely used as a true alternative to prison, but rather as an added condition of probation. The body of research on community service in the United States is modest, so relatively little is known about its characteristics and administration. Data were attained from 88 Texas probation professionals via self-administered written surveys in an effort to gather information about the use of community service as a criminal sanction in Texas. Frequency distribution analyses identified characteristics of both community service programs and offender participants in Texas.

Forty-two commercially collected dumpsters from Denton’s Municipal Solid Waste Stream were emptied, sorted and weighed to characterize the material types and make preliminary recycling policy recommendations. The general composition of Denton’s solid waste stream was not significantly different from the composition of the nation’s solid waste stream. Fifty-eight percent of the observed waste stream was recyclable. Paper made up the largest portion of recyclable materials and the "grocery" source category had more paper than any of the other five categories. Based on these findings, an incrementally aggressive approach is recommended to reduce certain types of wastes observed in the waste stream. This would include a Pay-As-You-Throw Program followed by an Intermediate Processing Center that can be converted to a Materials Recovery Facility.

The incidence of sexual assault inundates the courts with many cases each year. Given the unique nature of the crime, judges and juries are faced with an array of different scenarios to which they are required to make fair, justifiable and consistent decisions. I examine child sexual assault cases of Dallas County 1999-2005, I look at both legal and extralegal factors including case characteristics, institutional characteristics and characteristics of the defendants and the victims. First, I examine the impact of the independent variables on sentence length using regression analysis to determine influences on sentencing for judges and juries. Second, I examine the same factors using Probit analysis to determine which characteristics make a life sentence more probable for those decision-makers.

Recital presented at the UNT College of Music Recital Hall in partial fulfillment of the Master of Music (MM) degree.

Orchestra concert performed at the UNT College of Music Concert Hall. Conducted by Mee-Ah Lo, Eun Young Park, and Stacy Weill in partial fulfillment of the Master of Music (MM) degree. Conducted by Ai Kuang Sun in partial fulfillment of the Doctor of Musical Arts (DMA) degree.

This research project concerns changes in hydrology resulting from urbanization of the upper sub-basin of the White Rock Creek Watershed in Collin and Dallas Counties, Texas. The objectives of this study are: to calculate the percent watershed urbanized for the period of 1961 through 1968 and the period of 2000 through 2005; to derive a 1960s average unit hydrograph and a 2000s average unit hydrograph; and, to use the two averaged hydrographs to develop a range of hypothetical storm scenarios to evaluate how the storm response of the watershed has changed between these two periods. Results of this study show that stormflow occurs under lower intensity precipitation in the post-urbanized period and that stormflow peaks and volumes are substantially larger compared to the pre-urbanized period. It is concluded that changes in watershed surface conditions resulting from urbanization have lowered the precipitation-intensity threshold that must be surpassed before storm run-off is generated.

The life history and case-making behaviors of Phylloicus ornatus from two springfed first order streams in the Edwards Plateau Bioregion of Texas were studied from January 1998 to November 1999. Field larval, pupal and adult samples and laboratory rearings indicated a multivoltine cycle. First instars differ from late instars in number of labral setae and in having a unique spur-like claw on each lateral hump. Larval development was asynchronous with second through fifth instars and pupae present most months. First instars were present April through July, October and November. Case making of first instar and case reconstruction of later instars extracted from their cases was documented by videophotography.

Recital presented at the UNT College of Music Recital Hall in partial fulfillment of the Master of Music (MM) degree.

Recital presented at the UNT College of Music Concert Hall in partial fulfillment of the Master of Music (MM) degree.

Recital presented at the UNT College of Music Recital Hall in partial fulfillment of the Master of Music (MM) degree

Recital presented at the UNT College of Music Recital Hall in partial fulfillment of the Master of Music (MM) degree.

Recital presented at the UNT College of Music Recital Hall in partial fulfillment of the Master of Music (MM) degree.

Recital presented at the UNT College of Music Recital Hall in partial fulfillment of the Master of Music (MM) degree.

Recital performed at the UNT College of Music Recital Hall

Recital presented at the UNT College of Music Concert Hall in partial fulfillment of the Master of Music (MM) degree.

Recital presented at the UNT College of Music Recital Hall in partial fulfillment of the Master of Music (MM) degree.

Recital presented at the UNT College of Music Concert Hall in partial fulfillment of the Master of Music (MM) degree.

Recital presented at the UNT College of Music Concert Hall in partial fulfillment of the Master of Music (MM) degree.

Recital presented at the UNT College of Music Recital Hall in partial fulfillment of the Master of Music (MM) degree.

Recital presented at the UNT College of Music Recital Hall in partial fulfillment of the Master of Music (MM) degree.

Recital presented at the UNT College of Music Concert Hall in partial fulfillment of the Master of Music (MM) degree.

Recital presented at the UNT College of Music Concert Hall in partial fulfillment of the Master of Music (MM) degree.

Recital presented at the UNT College of Music Concert Hall in partial fulfillment of the Master of Music (MM) degree.