Search Results

Atrazine Monitoring and Modeling in the Lake Lavon Watershed

Description: This report describes a study to identify the distribution and extent of areas potentially at risk for atrazine (a broad leaf weedkiller) runoff in the Lake Lavon watershed, which is a major water supply for the Dallas area. The report presents the results of the study and makes recommendations for how information can be used in a cost-effective watershed atrazine reduction strategy.
Date: August 2001
Creator: Atkinson, Samuel F.; Waller, William T.; Dickson, Kenneth L.; Sanmanee, Sirichai & Moreno, Maria C.
Partner: UNT Libraries

A Proposed Plan to Improve the Present System of Administering Special Education for Exceptional Children on a County-Wide Basis in Collin County

Description: This problem sets forth a proposal whereby the children who are classified in one of the categories for Special Education for "exceptional children", in Collin County Texas, may receive the most benefits from a program that is administered on a county-wide basis.
Date: 1947
Creator: Haralson, G. C.
Partner: UNT Libraries

Potamilus amphichaenus, Specimen #608

Description: One preserved mussel specimen including the left valve only. The specimen exhibits an elliptical shape; thin shell; bluish-white internal coloring; olive external coloring; no external sculpturing. Collected in the Trinity basin. The specimen measures between 60 - 100 mm in length and was assessed to be recently dead when collected.
Date: December 4, 1971
Creator: Britton, Joseph
Partner: Elm Fork Natural Heritage Museum

Potamilus purpuratus, Specimen #607

Description: One preserved mussel specimen including the right valve only. The specimen exhibits a rhomboidal shape; thick shell; white internal coloring; dark brown external coloring; no external sculpturing. Collected in the Trinity basin. The specimen measures between 0 - 60 mm in length and was assessed to be relatively-recently dead when collected.
Date: March 17, 1972
Creator: Pettit, J.
Partner: Elm Fork Natural Heritage Museum

Uniomerus tetralasmus, Specimen #1240

Description: One preserved mussel specimen including the left valve only. The specimen exhibits an elliptical shape; thin shell; bluish-white internal coloring; tan external coloring; no external sculpturing. Collected in the Trinity basin. The specimen measures between 60 - 100 mm in length and was assessed to be recently dead when collected.
Date: December 4, 1971
Partner: Elm Fork Natural Heritage Museum

Uniomerus tetralasmus, Specimen #1241

Description: One preserved mussel specimen including the right valve only. The specimen exhibits an elliptical shape; thin shell; bluish-white internal coloring; tan external coloring; no external sculpturing. Collected in the Trinity basin. The specimen measures between 0 - 60 mm in length and was assessed to be recently dead when collected.
Date: December 4, 1971
Partner: Elm Fork Natural Heritage Museum

Uniomerus tetralasmus, Specimen #1242

Description: One preserved mussel specimen including the left valve only. The specimen exhibits an elliptical shape; thin shell; bluish-white internal coloring; tan external coloring; no external sculpturing. Collected in the Trinity basin. The specimen measures between 0 - 60 mm in length and was assessed to be recently dead when collected.
Date: December 4, 1971
Partner: Elm Fork Natural Heritage Museum

Toxolasma texasense, Specimen #1123

Description: One preserved mussel specimen including the left valve only. The specimen exhibits an elliptical shape; moderately thick shell; single looped beak sculpturing; white internal coloring; dark brown external coloring; no external sculpturing. Collected in the Trinity basin. The specimen measures between 0 - 60 mm in length and was assessed to be long dead when collected.
Date: March 1, 1972
Creator: Pettit, J.
Partner: Elm Fork Natural Heritage Museum

Uniomerus tetralasmus, Specimen #1245

Description: One preserved mussel specimen including the right valve only. The specimen exhibits an elliptical shape; thin shell; bluish-white internal coloring; tan external coloring; no external sculpturing. Collected in the Trinity basin. The specimen measures between 0 - 60 mm in length and was assessed to be recently dead when collected.
Date: December 4, 1971
Partner: Elm Fork Natural Heritage Museum

Uniomerus tetralasmus, Specimen #1244

Description: One preserved mussel specimen including the right valve only. The specimen exhibits an elliptical shape; thin shell; bluish-white internal coloring; tan external coloring; no external sculpturing. Collected in the Trinity basin. The specimen measures between 0 - 60 mm in length and was assessed to be recently dead when collected.
Date: December 4, 1971
Partner: Elm Fork Natural Heritage Museum

Uniomerus tetralasmus, Specimen #1243

Description: One preserved mussel specimen including the left valve only. The specimen exhibits an elliptical shape; thin shell; bluish-white internal coloring; tan external coloring; no external sculpturing. Collected in the Trinity basin. The specimen measures between 0 - 60 mm in length and was assessed to be recently dead when collected.
Date: December 4, 1971
Partner: Elm Fork Natural Heritage Museum

Uniomerus tetralasmus, Specimen #1247

Description: One preserved mussel specimen including the left valve only. The specimen exhibits an elliptical shape; thin shell; bluish-white internal coloring; tan external coloring; no external sculpturing. Collected in the Trinity basin. The specimen measures between 0 - 60 mm in length and was assessed to be relatively-recently dead when collected.
Date: December 4, 1971
Partner: Elm Fork Natural Heritage Museum

Uniomerus tetralasmus, Specimen #1246

Description: One preserved mussel specimen including both the left and right valves. The specimen exhibits an elliptical shape; thin shell; bluish-white internal coloring; brown external coloring; no external sculpturing. Collected in the Trinity basin. The specimen measures between 60 - 100 mm in length and was assessed to be recently dead when collected.
Date: December 4, 1971
Partner: Elm Fork Natural Heritage Museum

Nesting Ecology of the Dickcissel (Spiza americana) on a Tallgrass Prairie Relict in North Central Texas

Description: Eighty-three species of vascular plants were inventoried on the prairie relict during peak dickcissel nesting. Based on foliar cover and occurrence frequency, the five dominant plants were heath aster (Aster ericoides), eastern gammagrass (Tripsacum dactyloides), little bluestem (Schizachyrium scoparium), sensitive briar (Schrankia roemeriana) and meadow dropseed (Sporobolus asper). Sixty-one percent of dickcissel nests were constructed on or immediately next to three plant species: eastern gammagrass, sensitive briar and green milkweed.
Date: May 1993
Creator: Steigman, Kenneth Lee
Partner: UNT Libraries

A Study of the Reading-Readiness Program in the Elementary Schools of Collin County to Determine the Extent to Which it is Planned to Meet Present Educational Theory

Description: The purpose of this study is to make an investigation of the reading readiness program of the elementary schools in Collin County, Texas, to determine whether the program is planned in accord with modern theories of education, or administered in the traditional manner of considering the subject.
Date: 1950
Creator: Bothwell, Tommie Jean Dobie
Partner: UNT Libraries

Litigation Subsequent to a Mandated Psycho-Educational Seminar for Divorcing Parents

Description: This study was designed to assess the difference in litigation between two courts: one mandating For Kids' Sake, a psycho-educational seminar for divorcing parents, and the other not so mandating. The level of difficulty of children's adjustment to divorce has been positively correlated with parental hostility. More hostile parents would have more contested cases, interim motions, and relitigations. This research compared final dispositions, interim motions, and relitigation between parents in two courts in Collin County, Texas. The treatment group was from the 219th District Court which mandated all divorcing parents with minor children to attend the For Kids' Sake Seminar and the control group was from the 199th District Court which did not so mandate. Archival data was collected from a computer generated list for the Total group data to assess final dispositions and directly from District Clerk files for the In-Depth group data to assess interim motions and relitigation. The Total group was comprised of 679 research subjects with 330 cases in the treatment group and 349 cases in the control group. The In-Depth group consisted of 182 cases from both courts with 84 cases in the treatment group and 98 cases in the control group. Chi square analysis of the total group revealed significantly more parents in the treatment group who non suited the divorce suit and remained married (p. < .05), a significantly lower number of cases in the treatment group with interim motions (p. < .10), and a significantly lower amount of relitigation in the treatment group (p. < .05). The results showed that the court that mandated For Kids' Sake evidenced a reduction in subsequent litigation which not only benefits the legal system but also hopefully reflects lower parental hostility and higher parental cooperation, thereby benefiting the children of divorce.
Date: May 1997
Creator: Buckner, Brenda Sullivan
Partner: UNT Libraries

Design, Development, and Implementation of a Computer-Based Graphics Presentation for the Undergraduate Teaching of Functions and Graphing

Description: The problems with which this study was concerned were threefold: (a) to design a computer-based graphics presentation on the topics of functions and graphing, (b) to develop the presentation, and (c) to determine the instructional effectiveness of this computer-based graphics instruction. The computerized presentation was written in Authorware for the Macintosh computer. The population of this study consisted of three intermediate algebra classes at Collin County Community College (n = 51). A standardized examination, the Descriptive Tests of Mathematics Skills for Functions and Graphs, was used for pretest and posttest purposes. Means were calculated on these scores and compared using a t-test for correlated means. The level of significance was set at .01. The results of the data analysis indicated: 1. There was a significant difference between the pretest and posttest performance after exposure to the computer-based graphics presentation. 2. There was no significant gender difference between the pretest and posttest performance after exposure to the computer-based graphics presentation. 3. There was no significant difference between the pretest and posttest performance of the traditional and nontraditional age students after exposure to the computer-based graphics presentation. Females had a lower posttest score than the mean male posttest score, but an analysis of the differences showed no significance. Traditional age students had a higher posttest performance score than the mean traditional age student posttest score, but their pretest performance scores were higher as well. An analysis of the differences showed no significance. In summary, this computer-based graphics presentation was an effective teaching technique for increasing mathematics performance.
Date: December 1996
Creator: Karr, Rosemary McCroskey
Partner: UNT Libraries

A Comparative Study of the Cost of Operating the Rural High Schools of Collin County Before and After Gilmer-Aikin Legislation

Description: Inasmuch as it has been assumed by the people of the State of Texas that the cost of operating the public school systems has risen since the Gilmer-Aikin Bills have gone into effect, the purpose of this study is to determine just what cost items have increased and to what extent. There are many cost items to be considered in the operation of a public school, and they have varied from year to year since the beginning of public school operation. This study attempts to determine those increased cost items in rural high schools which can be contributed directly to the passage of the Gilmer-Aikin Bills.
Date: August 1950
Creator: Pinkerton, Woodrow W.
Partner: UNT Libraries

An Evaluation of Practices and Procedures of Book Reporting in Secondary School English Classes

Description: The purpose of the study is to make an investigation into the practices and procedures recommended and employed in making book reports in the public schools. The aim is to determine also what methods are most recommended and what practices are followed in secondary school English classes. Special attention is given to the book reporting program in the Frisco High School. Attention is given to the needs for creating a taste for good reading, the ability to interpret what is read, and to the values accruing to the intelligent reader. The reports of reading, as given by a class of secondary pupils, are analyzed to determine the methods most advisable for creating these interests and abilities.
Date: 1949
Creator: Floyd, Roberta L.
Partner: UNT Libraries