This publication of the Dallas-Fort Worth Section of the American Chemical Society includes information about research, prominent scientist, organizational business, and various other stories of interest to the community.

In preparation of the Green Paper on greenhouse gas emissions trading within the European Union, the cost implications of EU-wide emissions trading carbon dioxide were estimated by E3-Lab with their PRIMES energy systems model. According to the report, if each EU member States implemented its target under the Burden sharing agreement individually, the total annual cost for the EU to reach the Kyoto target would be 9.0 billion Pound.

The World Wide Web has become a significant source of medical information for the public, but there is concern that much of the information is inaccurate, misleading, and unsupported by scientific evidence. This study analyzes the validity of health claims on the World Wide Web for the herbal Opuntia using an evidence-based approach, and supports the observation that individuals must critically assess health information in this relatively new medium of communication. A systematic search by means of nine search engines and online resources of Web sites relating to herbal remedies was conducted and specific sites providing information on the cactus herbal remedy from the genus Opuntia were retrieved. Validity of therapeutic health claims on the Web sites was checked by comparison with reports in the scientific literature subjected to two established quality assessment rating instruments. 184 Web sites from a variety of sources were retrieved and evaluated, and 98 distinct health claims were identified. 53 scientific reports were retrieved to validate claims. 25 involved human subjects, and 28 involved animal or laboratory models. Only 33 (34%) of the claims were addressed in the scientific literature. For 3% of the claims, evidence from the scientific reports was conflicting or contradictory. Of …

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I. This study attempts to investigate the address and reference terms between Korean husbands and wives in different situations by means of the questionnaire. In addition to the results by the questionnaire, questions relating to gender, age, culture and society were partially answered through out this survey. II. This study attempts to analyze metaphorical extension of Korean compound verbs. The patterns found in Korean compound verbs are similar to the work of Abby and Chelliah. That is secondary verbs in the construction of compound verbs which have two sequential verbs have bleached meanings in the processes of grammaticalization.

The effects of teamwork in a long-term care setting were explored, and four key elements of teamwork in the long-term care facility were discovered. These elements--clarity of purpose, clear communication, well-defined decision-making procedures, and participative leadership--are presented in detail. The literature reviewed as well as observations from personal participation in a case study show that employing the teamwork concept in a nursing home environment significantly enhances the quality of life for the residents of such facilities.

The Prothrow-Stith violence prevention curriculum for high school students was adapted and presented to middle school students. An adaptation in materials, reading level and administration should not adversely effect the outcome of program participation, as the concepts that form the foundation of this curriculum are applicable to all ages. The essential question addressed in this study is as follows: Is the adapted curriculum effective? The evaluation instrument used for both pretests and posttest showed three distinct sections that were composed of general knowledge statements; statements that indicated an attitudinal predisposition toward violence; and statements that indicated a behavioral predisposition toward violence. After factor analysis the general knowledge section showed three grouping factors: factual knowledge, murder knowledge and alcohol knowledge. Factor analysis of the attitude section yielded two factors: a positive attitudinal predisposition toward violence and a negative predisposition toward violence. Seven hypotheses were tested. The analysis showed in a significant difference between the pretest and posttest for all respondents as an increase in factual knowledge; a decrease in negative attitude predisposition toward violence; and, a decrease in behavioral predisposition toward violence. There was a significant difference between the participating schools; there was no significant difference between the ages; and, results …

The long-term care administrator profession is one that is both new and evolving. The unique historical perspective of this health profession is brief in the number of years it encompasses and crucial in understanding the current issues facing the profession. Administrator experiences provide a point of reference regarding the profession's structural problems. Ethical considerations play a dynamic role in administrators' daily jobs as well as their continued licensure. The significance of the profession's ongoing problems at the state and national level causes the need for alternatives to the current system. A combination of these alternatives must be embraced to assist in the recruitment and retention of long-term care administrators.

By allowing judgments based on a small number of exemplar documents to be applied to a larger number of unexamined documents, clustered presentation of search results represents an intuitively attractive possibility for reducing the cognitive resource demands on human users of information retrieval systems. However, clustered presentation of search results is sensible only to the extent that naturally occurring similarity relationships among documents correspond to topically coherent clusters. The Cluster Hypothesis posits just such a systematic relationship between document similarity and topical relevance. To date, experimental validation of the Cluster Hypothesis has proved problematic, with collection-specific results both supporting and failing to support this fundamental theoretical postulate. The present study consists of two computational information visualization experiments, representing a two-tiered test of the Cluster Hypothesis under adverse conditions. Both experiments rely on multidimensionally scaled representations of interdocument similarity matrices. Experiment 1 is a term-reduction condition, in which descriptive titles are extracted from Associated Press news stories drawn from the TREC information retrieval test collection. The clustering behavior of these titles is compared to the behavior of the corresponding full text via statistical analysis of the visual characteristics of a two-dimensional similarity map. Experiment 2 is a dimensionality reduction condition, in …

This study describes macroinvertebrate community structure and assesses its potential in detecting point and non-point sources of disturbance associated with rural and urban areas in the Upper Trinity River Basin. Geospatial techniques were used to quantify landuse within the watershed in a GIS. At rural sites near the headwaters of the Trinity River, collector-gathering burrowers that are adapted to minimal flow comprised the majority of taxa. Destinies of taxa compositions at downstream sites increased and shifted toward psammophilic and rheophilic invertebrates, including primarily collector-filtering clingers, that are characteristic of shifting sand habitats in large prairie rivers. Benthic community structure generally benefited from point source impacts including wastewater treatment plant effluents that maintained higher flow. Community indices were negatively associated with forest landuse and positively associated with urban landuse. Partial CCA determined that flow and landuse contributed equally to species dispersions. Comparisons with historical biomonitoring studies in upper Trinity River Basin indicate improved watershed health.

Atomic resolution images of hot-tungsten filament chemical-vapor-deposition (CVD) grown epitaxial diamond (100) films obtained in ultrahigh vacuum (UHV) with a scanning tunneling microscope (STM) are reported. A (2x1) dimer surface reconstruction and amorphous atomic regions were observed on the hydrogen terminated (100) surface. The (2x1) unit cell was measured to be 0.51"0.01 x 0.25"0.01 nm2. The amorphous regions were identified as amorphous carbon. After CVD growth, the surface of the epitaxial films was amorphous at the atomic scale. After 2 minutes of exposure to atomic hydrogen at 30 Torr and the sample temperature at 500° C, the surface was observed to consist of amorphous regions and (2x1) dimer reconstructed regions. After 5 minutes of exposure to atomic hydrogen, the surface was observed to consist mostly of (2x1) dimer reconstructed regions. These observations support a recent model for CVD diamond growth that is based on an amorphous carbon layer that is etched or converted to diamond by atomic hydrogen. With further exposure to atomic hydrogen at 500° C, etch pits were observed in the shape of inverted pyramids with {111} oriented sides. The temperature dependence of atomic hydrogen etching of the diamond (100) surface was also investigated using UHV STM, and …

Unique and proprietary data of the illiquid, one-year non cancelable for three month Bermudan swaps (1Y NC 3M swaps) and one-year non callable for three months Bermudan CDs (1Y NC 3M CDs), provides evidence of market efficiency. The 1Y NC 3M swap and 1Y NC 3M CD markets efficiently reflected unexpected economic information. The 1Y NC 3M swaption premiums also followed the European one-year into three-month (1Y into 3M) swaption volatilities. Swaption premiums were computed by pricing non-optional instruments using the quoted 1Y NC 3M swap rates and the par value swap rates and taking the difference between them. Swaption premiums ranged from a slight negative premium to a 0.21 percent premium. The average swaption premium during the study period was 0.02 percent to 0.04 percent. The initial swaption premiums were over 0.20 percent while the final swaption premiums were 0.02 percent to 0.04 percent. Premiums peaked and waned throughout the study period depending on market uncertainty as reflected in major national economic announcements, Federal Reserve testimonies and foreign currency devaluations. Negative swaption premiums were not necessarily irrational or quoting errors. Frequently, traders obligated to provide market quotes to customers do not have an interest and relay that lack of …

Differences in self-reported depression, anxiety, self-esteem, and coping were evaluated in two groups of pediatric oncology patients: newly diagnosed (less than six months post-diagnosis) (n=5) and patients on cancer treatment for seven months or longer (n=5). Participants (6 males, 4 females, ages 7-17 years) completed the Children's Depression Inventory (CDI), the State-Trait Anxiety Inventory for Children (STAIC), and the Culture-Free Self-Esteem Inventory (CFSEI-2); nine of the ten participants discussed in a semi-structured interview their personal experiences and feelings about having cancer. Although the newly diagnosed group had a higher mean score on the CDI than the 7 months or greater group, the difference was not significant (p = .054). The newly diagnosed group also had higher mean state and trait anxiety scores on the STAIC, indicating higher anxiety levels, and a slightly lower CFSEI-2 mean score, indicating slightly lower self-esteem than the 7 months or greater group, but differences were not at a statistically significant level (p>.05).

he purpose of this study was to determine the effects of one approach to vocabulary instruction on the reading and writing vocabulary of fourth grade students in an individualized reading program. The vocabulary instructional approach used student-selected vocabulary words as well as instruction in vocabulary strategies such as context clues, structural analysis, and definition strategies. The twelve week study exposed one fourth grade classroom to vocabulary instruction in a Reading Workshop setting. Major components of the program were mini-lessons, which often involved vocabulary strategies, the silent reading of self-selected books, one-on-one researcher/student interactions, and the self-selection of vocabulary words. The research design is descriptive in nature and used both qualitative and quantitative research methods. Qualitative data included student interviews, teacher interviews, student writing samples, and field note observations. Quantitative data included vocabulary test scores from two groups of students, Group A and Group B. Group A participated in the self-selected vocabulary approach and received vocabulary instruction from the researcher acting as participant observer. Group B received some vocabulary instruction from their classroom teacher, but did not participate in the same program. The test was constructed weekly from a class (Group A) generated list of ten words. Results from vocabulary tests …

Subjects rated 12 female body shapes with respect to their physical attractiveness, and the extent to which they would be expected to possess various personality characteristics. The shapes were varied using 3 levels of overall weight and 4 levels of body shapeliness. The sample was modified to control for socioeconomic factors and results are based on 297 undergraduates from Caucasian, African American, and Hispanic racial backgrounds. Loglinear analyses revealed that men and women, regardless of racial background, rated shapely underweight females as most physically attractive, sexy, and ideal for a woman, followed by normal weight figures of similar proportion. African Americans, women in particular, judged the shapely normal weight figures more favorably than the other subjects. Multidimensional scaling and subsequent frequency analyses showed that those figures judged as most attractive, sexy, and ideal were also expected to be fairly emotionally stable, and most successful and interpersonally competitive, but least faithful, kind, and family-oriented. Overweight female shapes, while rated as least physically attractive, sexy, and emotionally stable, were expected to be most family-oriented, kind, and faithful. Shapely normal weight figures were judged to be attractive and sexy, and were assumed to possess a moderate amount of the personality traits in question. …

This thesis examined how receivers who vary in Interaction Involvement and Locus of Control (LOC) might differ in their interpretations of service complaints. Locus of control was measured using Rotter's (1966) LOC scale, while Interaction Involvement was measured with Cegala's (1984) Interaction Involvement measure, including a separate assessment of the effects for each sub-scale. Individuals were assigned to four groups based on their Interaction Involvement and LOC scores. The groups were compared with one-another for differences in how complaints were interpreted. Four complaint categories and a corresponding scale were developed to measure these differences. The categories were Subject, Goal, Opportunity, and Accountability. Interaction Involvement was expected to affect how receivers interpret the subject and goal of a complaint, while LOC was predicted to affect understanding of the opportunity and accountability aspects. Two research questions explored possible relationships between the complaint categories and the independent variables for individuals within each group. The study's four hypotheses were not supported, although some evidence was found for a significant relationship between receiver Interaction Involvement and perceived complainant Opportunity, for External LOC individuals only.

Let M be the class of simple matroids which do not contain the 5-point line U2,5 , the Fano plane F7 , the non-Fano plane F7- , or the matroid P7 , as minors. Let h(n) be the maximum number of points in a rank-n matroid in M. We show that h(2)=4, h(3)=7, and h(n)=n(n+1)/2 for n>3, and we also find all the maximum-sized matroids for each rank.

This study focused on the effectiveness of integrating traditional plant community analyses with landscape ecological analyses based on remotely sensed data. A temporal analysis of plant community diversity was conducted for major plant communities of the Ray Roberts Lake area using transect monitoring data collected between 1987 and 1997. Landscape analyses were performed with FRAGSTATS*ARC using classified SPOT satellite imagery for 1987 and 1997. Although the methodology developed in this work was exploratory, it was found that characterizing the dynamics of major plant communities in the study area produced a more effective and insightful analysis of Ray Roberts Lake area landscape dynamics.

This study was designed to determine the effectiveness of individual child-centered play therapy in the elementary school in: 1) enhancing the self-concept of kindergarten children who are experiencing adjustment difficulties; 2) decreasing the overall behavioral problems of kindergarten children experiencing adjustment difficulties 3) decreasing externalizing behavior problems such as aggression and delinquency of kindergarten children experiencing adjustment difficulties; 4) decreasing the internalizing behavior problems such as withdrawal, somatic complaints, anxiety and depression of kindergarten children experiencing adjustment difficulties; 5) increasing parental perception of change in the problematic behaviors of kindergarten children experiencing adjustment difficulties; and 6) enhancing self-control in kindergarten children experiencing adjustment difficulties. A secondary objective was to compare the participants involved in individual child-centered play therapy with participants in a previous study who were involved in child-centered group play therapy on the above named dimensions. The experimental group, consisting of 14 kindergarten children experiencing adjustment difficulties, received 10-12, 30-minute individual play therapy sessions in a 12 week period in their elementary school. The comparison group, utilized from the 1999 McGuire study, consisted of 15 children with adjustment problems and received 12-14, 45-minute group play therapy sessions in 14 weeks in their elementary school. The control group, consisting of …

In 1997, NLNAC added critical thinking as a required outcome for accreditation of associate degree nursing (ADN) programs. Until recently general critical thinking tests were the only available standardized critical thinking assessment tools. The emphasis has shifted to discipline specific tools. This concurrent validity study explored the correlation between two critical thinking tests, a general skills test, the California Critical Thinking Skills Test (CCTST) and a discipline specific test, the Arnett Critical Thinking Outcome Evaluation (CTOE). Both tests are based on the same definition of critical thinking. The CCTST, developed in 1990, covers discipline neutral content in multiple choice items. The CTOE, a free entry, written response test developed in 1998, assesses critical thinking in nursing situations using a partial credit model. A convenience sample of 434 sophomore ADN students from 9 programs in Texas completed the demographic survey and critical thinking tests in 1999. The sample was 87.9% female and 74.2% Caucasian, with a mean age of 31, mean GPA of 3.13, mean 3.7 years healthcare employment experience, mean CCTST score of 15.0023 and mean CTOE of 82.69. The sample also included 22.4% current LVNs, 15.7% with prior degrees and 53.5% in the first generation of their family to …

This study assessed the water quality of the Elm Fork Watershed with regards to the herbicide Atrazine. Atrazine is a potential environmental endocrine disruptor and carcinogen. Overall, concentrations were lower than the four-quarter drinking water average of 3 µg/Lthe Maximum Contaminant Level set by the USEPA. However, three creek stations had four-quarter average concentrations greater than 3 µg/L, and virtually all samples exceeded the 0.1 µg/L standard set in Europe [1,2]. Statistically significant differences in concentrations were detected between the 27 sampling stations and areas of high concentrations were identified. However correlations between Atrazine concentrations and land-use and precipitation were not statistically significant. Further analysis with more detailed data should be conducted before any relationships are discarded.

Fluorocarbons are known to be stiffer than their hydrocarbon analogues, a property that underlines the extensive industrial application of fluorocarbon materials. Although there has been previous studies on the rotational barrier of molecules having fluorocarbon centers, a detailed systematic study is necessary to quantify flurocarbon stiffness. The molecules, Pyrene-(CF2)n-Pyrene, Pyrene-(CF2)n-F, Pyrene-(CH2)n-Pyrene and Pyrene-(CH2)n-H were therefore synthesized to enable the determination of the barrier to rotation of the carbon backbone in fluorocarbons. Conformational studies will be completed with steady-state and time-dependent emission spectroscopy.

A multiple baseline design was employed to evaluate the effectiveness of a sibling training package including modeling, role-play, and feedback on play and engagement between children with autism and their siblings. The results of two experiments suggest that, following training, siblings of children with autism correctly implemented all trained interaction components. Additionally, Experiment II assessed and programmed generalization to other materials and a non-training setting. The results showed that some unprogrammed generalization to non-trained toys occurred. Conversely, siblings engaged in trained skills in a non-training setting (home) only following the experimenter's instructions to generalize. In both experiments, the siblings' overall engagement and physical proximity of play in training sessions increased significantly above baseline. This study extends previous research in that it includes additional stimulus and response generalization measures.

In this thesis, I analyze three positions of the wh-word in Malay and attempt to explain what accounts for the differences between them. Specifically, I consider if the movement of the wh-interrogative is really wh-movement or if something else is going on. In regard to the the in-situ wh-words and the partially moved wh-words, I consider whether these move covertly and if they do, if this is feature movement or covert phrasal movement.