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The Effects of Voluntary Lateral Orienting on Positive Manifold for Lateralized Cognitive Tasks
As an extension of previous studies (Urbanczyk, Angel, & Kennelly, 1988) examining the effects of unimanual finger tapping on lateralized cognitive tasks, lateral body orienting was added to an established dual task paradigm to generate differential hemispheric activation and shifts of attention. One hundred twenty university students retained sequences of digits or spatial locations for 20 seconds either alone or during finger tapping. By turning both head and eyes left or right, the hemisphere congruent with the sequences (LH for digits, RH for locations) or incongruent (vice versa) was activated. Activation had little effect on retention means but greatly affected resource composition supporting task performance. Congruent orientation produced significantly higher positive correlations between digit and location tasks than incongruent orientation. Females showed higher sequence retention correlations than males across both orienting groups. For females, congruent activation enhanced tapping rates and retention-tapping correlations. For males, activation affected neither of these. Discussed in light of neuroanatomical research, these results suggest that congruent attentional orienting may integrate regions of the less activated hemisphere into networks of the more activated hemisphere. This unification may occur more readily across the female corpus callosum, producing a greater dependence upon a general attentional resource than for males, who appear to depend more upon hemispheric resources.
The Effects of Water Pollution Control Laws on Industrial Plant Location
The objective of this research is to determine the degree to which the recent antipollution laws will affect the location of industrial plants.
Effects of Water Quality, Instream Toxicity, and Habitat Variability on Fish Assemblages in the Trinity River, Texas
The Trinity River flows through the Dallas-Ft. Worth Metroplex in north central Texas where it receives effluents from numerous point sources including seven large regional wastewater treatment facilities. Historically, the Trinity River has been impacted by massive wastewater loadings which often constitute > 80% of the total river discharge during low flow periods. Normally, high mass loadings correspond to the summer months, compounding the effects of a naturally stressful period, characterized by high temperatures and low dissolved oxygen concentrations. Samples from 12 stations were collected quarterly over an 18 month period from the Trinity River and two tributaries. Water samples were analyzed for a variety of water quality variables, including metals, priority pollutants, pesticides, and general water quality parameters. Water samples were also tested for acute and subchronic effects with several test species. Fish were collected at each station and assemblages were characterized using traditional classification techniques and the Index of Biotic Integrity. In addition, sediment samples were assessed for toxic effects which could have adversely impacted fish recruitment and in situ biomonitoring experiments were performed. Quantitative habitat characterization analyses were performed to gain additional information that could possibly explains differences in fish assemblage structure related to habitat variability. Data were analyzed using regression, univariate, multivariate, and descriptive statistical techniques and new approaches for analyzing impact assessment data were discussed. Results indicated that the most substantial impacts on fish assemblages were confined to a segment of the river where a sequence of point sources, in close proximity to each other, were overloading the river's capacity to sufficiently dilute and/or detoxify the effluent. Data also indicated the presence of episodic toxicity from nonpoint sources. In addition, toxic effects in sediment samples and differences in habitat were detected and may have contributed to measured differences among fish assemblages in the Trinity River.
Effects of Water Source, Suspended Solids, and Acclimation on Biotransformation of 2 /4-Dichlorophenoxy Acetic Acid in Aquatic Systems
In recent years there has been a great deal of scientific interest in processes that affect the fate of organic chemicals in the environment. one main reason for this increased interest is due to greater environmental concern over accidental or purposeful release of these chemicals into the environment by man. A major environmental concern is the increased use of pesticides over the last few years. In the thirty years prior to 1978 the use of pesticides has increased by a factor of forty (Ridgeway et al., 1978). Recently the use of herbicides has been increasing, but that of insecticides has stabilized (Willis, 1983). Detectable amounts of organic pesticides can be found in many areas of the biosphere. For toxic organic chemicals to be used safely, researchers must have a clear understanding of the fate and persistence of these chemicals when they are released into the environment. This understanding will also allow the development of new products that, when properly used, will not produce adverse effects to man or the environment (Weber, 1972). According to the Toxic Substance Control Act (TSCA) any new or expanded-use chemical that might be released into the environment must be tested for environmental hazard.
Effects of Web-based Instruction in High School Chemistry.
The intent of this study is to identify correlations that might exist between Web-based instruction and higher assessment scores in secondary education. The study framework was held within the confines of a public high school chemistry classroom. Within this population there were students identified as gifted and talented (GT) as well as those without this designation. These two classifications were examined for statistically higher assessment scores using a two-tailed t-test. Results indicated that females outperformed males on pre- and post- instructional unit tests. All subgroups improved their logical-thinking skills and exhibited positive attitudes towards Web-based instruction. In general, Web-based instruction proved beneficial to improving classroom performance of all GT and non-GT groups as compared to traditional classroom instruction.
The Effects of Web-Based Learning Versus Traditional Instructor-Based Learning on Student Knowledge and Satisfaction Based on Student Learning Styles
The purpose of this study was to compare the effects of Web-based learning (WBL) versus those of traditional instructor-based learning (IBL) on student knowledge and satisfaction based on student learning styles. Other goals were to determine if WBL is more effective for those with a particular learning style. The study examined a sample of undergraduate students who were enrolled in the college algebra offered as both oncampus instructor-based (traditional) and Web-based at the university of North Texas (UNT). A total of 36 Web-based students and 58 instructor-based students participated in this study. This study utilized a posttest-only intact group. The Kolb Learning Style Inventory (LSI) measured the learning styles of students. This study used learning methods (Web-based learning (WBL), instructor-based learning (IBL)), and learning styles (Diverger, Converger, Assimilator, and Accommodator) as independent variables. Student knowledge and student satisfaction was measured at the end of the course as independent variables. Based upon the results of the LSI, post-learning exam, and satisfaction a series of two-way analysis of variance (ANOVA 4x2) techniques and independent variable tests was used for each of the dependent variables, knowledge and satisfaction, based on a student's learning styles. The results revealed that students' learning styles were statistically significant for knowledge when learning on the Web versus instructor-led. In addition, the learning style was important factor for Web-based learning. The results indicated students with Assimilator and Converger as learning styles received better result with the Web-based learning method. Furthermore, this study found there is significant difference in student satisfaction based on learning on the Web versus instructor-led. The outcome of the study could be of particular interest in educational institutions; especially those that want to transfer some of their traditional courses onto the Web. The finding also has implications for training organizations as they seek efficient and effective ...
The Effects of Weight Loading and Repetitions, Frequency of Exercise, and Knowledge of Theoretical Principles of Weight Training on Changes in Muscular Strength
The purpose of this study was to determine the effects of weight loadings and repetitions, frequency of exercise, and knowledge of theoretical principles of weight training on changes in muscular strength. Another purpose was to analyze these effects and determine implications for coaches, physical educators, physical therapists, and others interested in determining the optimum combination of the three variables for increasing muscular strength.
Effects of Whisker-Trimming on GABAA Receptors in S1 Cortex
A number of studies have shown that sensory deprivation is associated with selective decreases in GABA, GAD, and GABA receptors, in deprived areas of visual and somatosensory cortex. Those studies focused on layer 4, a recipient of direct thalamocortical sensory input. However, supragranular layers 2/3 have been recently identified as a major locus of functional plasticity in sensory deprivation and long-term potentiation. To examine whether GABAA receptors in layers 2/3 are affected by sensory deprivation, rats had mystacial vibrissae in middle row C or rows ABDE trimmed for 6 weeks beginning in early adulthood. Layers 2/3 above the deprived and adjacent whisker barrels were located in tangential sections, using patterns of radial blood vessels as fiducial marks. In deprived whisker barrel columns, [3H]muscimol binding to GABAA receptors decreased by 12.8% ± 1.2 (P &lt; 0.001) in layers 2/3 and 11.4% ± 1.2 (P<0.001) in layer 4. Altered levels of GABAA α1 subunit (Fritschy et al., 1994) were indicated by reduced optical density of immunostaining, both in deprived layers 2/3 (6.4% ± 0.7; P&lt; 0.001) and in layer 4 (3.4% ± 1.0; P &lt; 0.005). Interestingly, Nissl staining density also decreased in deprived layers 2/3 (12.7% ± 1.8 P &lt; 0.001) and in 4 (6.0 ± 0.7 (P &lt; 0.001). The percent decreases were greater in layers 2/3 than in 4 for both GABAA α1 (P &lt; 0.05) and Nissl substance (P &lt; 0.005). The present results suggest that down-regulation in GABAA receptors may underlie the physiological signs of disinhibition observed in neurons of layer 2/3 and 4 in deprived whisker barrel columns.
The Effects of Workshop Training and Coaching on the Acquisition and Generalization of Teaching Skills
The purpose of this study was threefold: (a) to examine the separate effects of increased accuracy on multiple-choice/rank-order written tests and coaching on the teaching performance of participants; (b) to compare generalization across tasks produced by the workshop and coaching; and (c) to assess maintenance of teaching performance. Following baseline, two adults received a lecture on discrete trial teaching procedures. A written test measured verbal performance on workshop material periodically throughout this phase. During the next phase, each adult then experienced further training via in-situ coaching. A multiple baseline design across tasks was used during the coaching phase. Results of the workshop training package revealed an inverse relationship between the strongest verbal performance and strongest teaching performance skill areas. In addition, only with the introduction of the in-situ coaching package did teacher performance improve significantly across all behaviors. Child responding remained relatively constant throughout the study, regardless of teacher performance. Some generalization of teacher behavior was observed across tasks, but was extremely variable across both workshop and coaching conditions. After the cessation of coaching, teacher performance remained stable across maintenance phases and at a 6-week follow-up.
The Effects of Writing-to-learn Tasks on Achievement and Attitude in Mathematics
The problem of this study was to determine the effects of implementing writing-to-learn tasks in mathematics instruction on fourth grade students' achievement and attitude toward mathematics. Also addressed in this study is whether or not achievement and attitude measures of female students and low achieving students are effected by the use of writing in mathematics.
The Effects of Written Comment on Expository Composition
This study was planned to investigate the effects of written comments on the expository compositions of eleventh-grade students using a cross section of ability groups. Data for combined groups and data for high-, middle-, and low-ability groups were used to determine whether one type of comment was more effective than another in improving the quantity and quality of student compositions and in improving student attitudes toward composition. Teachers may use the findings as a guide to what kinds of comments are most effective in reinforcing good writing skills and attitudes.
Effects of X-Irradiation of Respiration in Frog Brain Tissue Slices Using the Oxygen Electrode Method
The effects of X-irradiation at dosages of 40 r, 80 r, 160 r, 240 r, 320 r, 400 r, 800 r, 4 Kr, 8 Kr, and 16 Kr on the oxygen uptake of frog brain (Rana pipiens) tissue slices were studied. A membrane-covered oxygen electrode method was used to measure the respiratory rate. Continuous recordings were made before, during, and following X-irradiation in all of the test experiments. X-irradiation was delivered from a G. E. beryllium window X-ray unit at 120 KVP, 5 ma with a 1/4 mm Al filter.
Effects of X-irradiation on Ion Flux in Desheathed Toad Sciatic Nerves
The purpose of this thesis is to determine the effects of x-irradiation on the efflux of potassium, sodium and calcium ions from stimulated and unstimulated desheathed sciatic nerves.
Effects of X-Irradiation on Na22 Efflux in Isolated Nerves
The purpose of this study was twofold: 1) to present experimental data on changes in permeability of fibers during irradiation using Na22 as the tracer isotope, and 2) to attempt to correlate these findings with the electrical changes observed.
Effects of X-irradiation on Potassium Flux in Isolated Nerves
The purpose of this study, therefore, was threefold in nature: (1) to determine the effects of x-irradiation on the influx and efflux of potassium in compound nerve fibers (2) to attempt to relate the radiation-induced changes in electrical activity with potassium flux and (3) to use the information obtained to gain insight into the possible cellular site (s) of radiation insult to compound nerves.
Effects of X-Irradiation on Water and Ion Flux in Isolated Roots
Due to the relatively small amount of work concerning radiation, it was thought feasible to use ionizing radiation as a tool to study the relationship between water and salt flux in isolated root systems. Moreover, the more quantitative potometric method lends itself well to such a study, since the two processes can be followed simultaneously. the aims of this study, therefore, were 1) to determine effects of X-irradiation on water, calcium and potassium flux in excised onion roots; 2) to determine the dose levels required for producing permeability changes; 3) to investigate the nature of radiation damage to root systems; and 4) to attempt to shed light on the relation between water transport and ion movement in root systems.
Effects on Survival, Reproduction and Growth of Ceriodaphnia dubia following Single Episodic Exposure to Copper or Cadmium
Effects of episodic exposures have gained attention as the regulatory focus of the Clean Water Act has shifted away from continuous-flow effluents. Standardized laboratory toxicity tests require that exposure be held constant. However, this approach may not accurately predict organism responses in the field following episodic exposures such as those associated with rain-driven runoff events or accidental pollutant discharge. Using a modified version of the 7-day short-term chronic test recommended by the US Environmental Protection Agency, Ceriodaphnia dubia were exposed to copper or cadmium for durations ranging from 1 minute to 24 hours. In addition, adult reproductive recovery and effects on second generation individuals was assessed following select copper exposures. Finally, cadmium exposures were compared in reconstituted hard water (RHW) and municipal treated wastewater effluent (TWE). Following exposure, organisms were transferred to clean RHW or TWE and maintained for the remainder of the test. No- and lowest observed effect concentrations (NO- and LOECs) increased logarithmically with respect to logarithmic decreases in duration regardless of metal, endpoint or water type. Effective concentrations of cadmium however, were usually higher than those of copper, especially in TWE. LOECs for C. dubia survival following 24-hour and 5-minute exposures to copper were 116 and 417 µg/L, respectively. LOECs for fecundity were 58 and 374 µg/L, respectively. Neonate production of first generation adult C. dubia appeared to recover from pulsed copper exposure upon examination of individual broods. Cumulative mean neonate production however, showed almost no signs of recovery at exposure durations ≥3 hours. Pulse exposure to copper also resulted in diminished fecundity of unexposed second generation individuals. Such effects were pronounced following parental exposure for 24 hours but lacking after parental exposures ≤3 hours. LOECs for C. dubia survival following 24-hour and 5-minute exposures to cadmium in RHW were 44 and 9000 µg/L, respectively. LOECs for ...
Efficacy in Texas Charter Schools Compared to Traditional Public Schools
The need to spur innovation and improve student performance initiated the formation of, under different legislative acts, charter schools that include variations of traditional public schools. With the enthusiasm and level of investment going into the formation of charter schools, it is necessary to explore whether these schools have achieved their objectives. This study explored whether Texas open enrollment charter schools perform bettered compared to Texas public schools. The study applied a causal comparative quantitative research design. School data on graduation and dropout rates, college preparation, attendance rates, and overall performance were analyzed quantitatively. Student achievement data available for statistical analysis includes student performance on the Texas Assessment of Knowledge and Skills (TAKS) state assessment from 2007 to 2011. Data analysis for race, special programs, at risk, economically disadvantaged, and limited English proficiency was incorporated. Descriptive statistics and analysis of variance techniques were included in the data analysis. The analysis extended to post hoc tests to determine variables that caused variation. The study found Texas open-enrollment charter schools had more African American students but fewer Whites compared to public schools. Students in public schools performed better than those in charter schools, and Whites yielded the best performance. Charter schools had high dropout rates, low attendance, and low graduation rates, while public schools had low dropout rates, high attendance, and high graduation rates. Finally, public schools had more students ready for college than charter schools.
The Efficacy of Anxiety-Relief Therapy and Systematic Desensitization in the Treatment of Snake-Phobic Behavior
The purpose of this study is to determine the efficacy of anxiety-relief therapy when compared with three other treatment groups (group systematic desensitization; a pseudo-therapy, suggestion, group; and a no-treatment group).
The Efficacy of Equine Assisted Group Counseling with At-Risk Children and Adolescents
The purpose of this study was to determine the efficacy of equine assisted group counseling as compared to in-school curriculum group guidance/counseling. Research examined externalizing, internalizing, maladaptive, and adaptive behaviors of elementary and middle school students who were considered at-risk of academic or social failure. Two types of behavior instruments, the Behavioral Assessment System for Children (BASC)-Self-Rating, Parent-Rating, and Teacher-Rating Scales; and the Animal Assisted Therapy-Psychosocial Session Form (AAT-PSF), were used in a pretest-posttest comparison group quasi experimental design. Results of the paired sample t-test analysis of the BASC Self-Report indicated that the equine assisted counseling group showed statistically significant improvement in five behavior areas, and the in-school curriculum group guidance/counseling group showed statistically significant improvement in four areas, with only one behavior area the same as the equine assisted counseling group. Results of the paired sample t-test analysis of the BASC Parent-Report indicated that the equine assisted counseling group showed statistically significant improvement in twelve behavior areas, whereas the in-school curriculum group guidance/counseling showed statistically significant improvement in only one behavior area. Results of the paired sample t-test analysis of the BASC Teacher-Report indicated that the equine assisted counseling group showed no statistically significant improvement; however the in-school curriculum group guidance/counseling group showed statistically significant improvement in one area. An ANCOVA comparison of equine assisted counseling group verses in-school curriculum guidance/counseling group using the BASC Self, Parent, and Teacher-Reports indicated that the equine assisted counseling group showed statistically significant improvement in seven behavior areas that the in-school curriculum guidance/counseling group did not. Results of the repeated measures ANOVA of the AAT-PSF (equine assisted counseling group only) showed statistically significant improvement in all 3-scale scores: 1) overall total behaviors; 2) increased positive behaviors; and 3) decreased negative behaviors.
The Efficacy of Filial Therapy with Families with Chronically Ill Children
This study was designed to determine the effectiveness of Filial Therapy as a method of intervention with families with chronically ill children. Filial Therapy is an intervention that focuses on strengthening and enhancing the parent-child relationship. Parents are trained to become the agents of change for their children's behaviors by utilizing basic child-centered play therapy skills in weekly play sessions. The purpose of this study was to a) determine the effectiveness in decreasing parental stress, b) determine the effectiveness in increasing parental acceptance, and c) determine the effectiveness in decreasing problematic behaviors in the chronically ill child as assessed by their parents.
The Efficacy of Intensive Individual Play Therapy for Children Diagnosed with Insulin-Dependent Diabetes Mellitus
This study was design to determine the efficacy of intensive individual play therapy as a method of intervention for children diagnosed with insulin-dependent diabetes mellitus. The purpose of this study was designed to study the effectiveness of an intensive play therapy intervention in: a) reducing symptoms of childhood depression in children with IDDM; b) reducing symptoms of anxiety in children with IDDM; c) reducing the overall behavior difficulties in children with IDDM; d) increasing healthy adjustment in children with IDDM; e) increasing diabetic's children's adherence to their diabetic regime; and f) impacting these emotional and behavioral symptoms over time. The 15 children in the experimental group received 12, daily play therapy sessions while attending a summer camp for children with diabetes. The control group, consisting of 15 children who attended the diabetic summer camp, received no play therapy. Children and parents in both groups completed pretest, post-test and three-month follow-up data, consisting of: the Children's Depression Inventory, the Revised Children's Manifest Anxiety Scale, the Filial Problems Checklist and the Diabetes Adaptation Scale. Analysis of covariance revealed that the children in the experimental group significantly improved their adaptation to their diabetes following intensive play therapy as reflected by the Diabetes Adaptation Scale. No other hypothesis were retained, although statistical trends noted increased improvement in the experimental group in the areas of behavior difficulties and adherence behavior. Possible explanations for these results include a lack of symptoms reported at the time of pretesting and the validity of these instruments for a chronically ill population. The results of this study indicate that intensive play therapy may be an effective intervention for children diagnosed with IDDM. Qualitative observations and progress noted in therapy reveal that young children with IDDM have the capability to address and resolve issues of anxiety, depression and other emotional issues ...
Efficacy of Juvenile Offender Assessments: Utilization of Recommendations, Measurement Constructs, and Risk Factors
The purpose of this study was to explore the efficacy of juvenile offender assessments. Data from 104 juvenile offender assessments were analyzed and followed up with placement, subsequent offending, and outcome data from the juvenile and adult systems. Constructs consistently assessed included intellectual functioning, academic achievement, and personality functioning; however, under-diagnosis of intellectual deficits, learning disabilities, and personality disorders was found. Results indicated the assessment of family functioning, substance use, and social functioning should be included in comprehensive assessments, as they may result in alternative placement and treatment options of benefit to the juvenile offender. A juvenile offender typology proposed by DiCataldo and Grisso (1995) was successfully utilized and proved predictive of recidivism, future harm to others, and outcome.
Efficacy of neurofeedback for children with histories of abuse and neglect: Pilot study and meta-analytic comparison to other treatments.
This two-part study investigates the effectiveness of neurofeedback training for reducing behavioral problems commonly observed in abused/neglected children, and compares its efficacy to other treatment interventions with this population. Neuro-developmental sequelae of early relationship trauma are explored as an etiological framework for understanding disturbed affect-regulation, which appears central to the behavioral and emotional difficulties commonly experienced by this pediatric population. It is suggested that neurofeedback teaches children to self-regulate brain rhythmicity mechanisms, which in turn affects global improvements in behavior and mood. The pilot study utilizes records of 20 children removed from their biological homes by Child Protective Services. Children were assessed prior to treatment using the Child Behavior Checklist (CBCL) and the Test of Variables of Attention (TOVA), and again after 30 sessions of individualized, qEEG-guided neurofeedback training. A t-test analysis of pre- and post-scores was computed, and indicated significant improvements following treatment. A meta-analysis of existing literature on treatment interventions with abused/neglected children provides individual and aggregate effect sizes for 33 outcome studies with this clinical population, and contextualizes the results of the present pilot study within other empirically validated treatment modalities. Establishment of an overall effect size for treatment for this pediatric population provides a needed method of comparing research results across studies when control groups may not be ethical or feasible.
The efficacy of self-administered systematic desensitization
The purpose of this study was to test the therapeutic usefulness of a completely self-administered, behavior-therapy technique: systematic desensitization. The method involved the comparison of behavior change following the treatment of two groups of subjects. One group received the actual systematic-desensitization procedure, while the other underwent a similar but theoretically ineffective treatment termed attention-placebo.
The Efficacy of the Chickasaw Nation Early Care and Education Programs
The purposes of this research were to explore the effectiveness of the Chickasaw Nation early care and education program in promoting school readiness while infusing tribally relevant values in children from birth through age five; engaging parents in all aspects of their children’s learning; and supporting children and families through the transitioning to kindergarten. The study used qualitative methods to examine the experiences and perceptions of ten parents, ten teachers, and five administrators within Chickasaw Nation’s early care and education system regarding the four basic areas of school readiness, parent engagement, transition, and culturally relevant pedagogy. Four primary themes emerged from the semi-structured interviews: 1) socialization, school readiness, and transition, 2) learning, curriculum, and assessment, 3) the role of parents, and 4) cultural integrity. Data were collected through semi-structured interviews, transcribed, and analyzed based on four research questions. Findings indicated parents, teachers, and administrators were satisfied that the program was successful with assisting children in making progress toward achieving developmental and school readiness goals and that the children were physically, socially, emotionally, and cognitively prepared to enter kindergarten. The program provided activities to encourage and promote parental involvement; however, parents did not indicate active involvement or participation in the activities. There was little evidence to support culturally relevant pedagogy alignment with curriculum and practices. Implications for additional research focusing on American Indian children in preschool programs and the importance of instilling pride and culture are recommended.
The Efficacy of Utilizing the Adaptive Behavior Inventory for Children for Educational Planning Purposes
No Description Available.
Efficiency of Nitrate and Phosphorus Removal in a Working Rain Garden
Rain gardens are low impact developments designed to mitigate a suite of issues associated with urban stormwater runoff. The site for this study was a Denton City rain garden at the Denton Waste Water Treatment Plant. Nitrogen and phosphorus removal was examined in light of two overflow events comprised of partially treated wastewater from an upslope anaerobic digester pond. Nitrate removal efficiency was examined across differing dry spell intervals of 5, 8, and 12 d, displaying a moderate negative correlation (r2 = 0.59). Continued phosphorus removal capacity was assessed, showing phosphorus removal in cases where P was in excess of 0.8 mg/L, reflecting an equilibrium phosphorus concentration. A high expanded shale component in the soil media (25%) was likely a factor in the continued removal of phosphorus. Overall the rain garden proved to be a large source of nitrate (+425%) and total nitrogen (+61%) by mass. The study showed that while the rain garden intercepted a large volume of partially treated wastewater during the overflow events, preventing it from reaching a nearby creek, the mitigation of an acute event has extended to a chronic one as nitrogen is gradually processed and flushed from the system as nitrate.
Efficient Algorithms and Framework for Bandwidth Allocation, Quality-of-Service Provisioning and Location Management in Mobile Wireless Computing
The fusion of computers and communications has promised to herald the age of information super-highway over high speed communication networks where the ultimate goal is to enable a multitude of users at any place, access information from anywhere and at any time. This, in a nutshell, is the goal envisioned by the Personal Communication Services (PCS) and Xerox's ubiquitous computing. In view of the remarkable growth of the mobile communication users in the last few years, the radio frequency spectrum allocated by the FCC (Federal Communications Commission) to this service is still very limited and the usable bandwidth is by far much less than the expected demand, particularly in view of the emergence of the next generation wireless multimedia applications like video-on-demand, WWW browsing, traveler information systems etc. Proper management of available spectrum is necessary not only to accommodate these high bandwidth applications, but also to alleviate problems due to sudden explosion of traffic in so called hot cells. In this dissertation, we have developed simple load balancing techniques to cope with the problem of tele-traffic overloads in one or more hot cells in the system. The objective is to ease out the high channel demand in hot cells by borrowing channels from suitable cold cells and by proper assignment (or, re-assignment) of the channels among the users. We also investigate possible ways of improving system capacity by rescheduling bandwidth in case of wireless multimedia traffic. In our proposed scheme, traffic using multiple channels releases one or more channels to increase the carried traffic or throughput in the system. Two orthogonal QoS parameters, called carried traffic and bandwidth degradation, are identified and a cost function describing the total revenue earned by the system from a bandwidth degradation and call admission policy, is formulated. A channel sharing scheme is proposed for ...
An Efficient Hybrid Heuristic and Probabilistic Model for the Gate Matrix Layout Problem in VLSI Design
In this thesis, the gate matrix layout problem in VLSI design is considered where the goal is to minimize the number of tracks required to layout a given circuit and a taxonomy of approaches to its solution is presented. An efficient hybrid heuristic is also proposed for this combinatorial optimization problem, which is based on the combination of probabilistic hill-climbing technique and greedy method. This heuristic is tested experimentally with respect to four existing algorithms. As test cases, five benchmark problems from the literature as well as randomly generated problem instances are considered. The experimental results show that the proposed hybrid algorithm, on the average, performs better than other heuristics in terms of the required computation time and/or the quality of solution. Due to the computation-intensive nature of the problem, an exact solution within reasonable time limits is impossible. So, it is difficult to judge the effectiveness of any heuristic in terms of the quality of solution (number of tracks required). A probabilistic model of the gate matrix layout problem that computes the expected number of tracks from the given input parameters, is useful to this respect. Such a probabilistic model is proposed in this thesis, and its performance is experimentally evaluated.
Efficient Linked List Ranking Algorithms and Parentheses Matching as a New Strategy for Parallel Algorithm Design
The goal of a parallel algorithm is to solve a single problem using multiple processors working together and to do so in an efficient manner. In this regard, there is a need to categorize strategies in order to solve broad classes of problems with similar structures and requirements. In this dissertation, two parallel algorithm design strategies are considered: linked list ranking and parentheses matching.
Efficient parallel algorithms and data structures related to trees
The main contribution of this dissertation proposes a new paradigm, called the parentheses matching paradigm. It claims that this paradigm is well suited for designing efficient parallel algorithms for a broad class of nonnumeric problems. To demonstrate its applicability, we present three cost-optimal parallel algorithms for breadth-first traversal of general trees, sorting a special class of integers, and coloring an interval graph with the minimum number of colors.
Effortless Control Processing: A Heuristic Strategy for Reducing Cognitive Bias in Judgments of Control
No Description Available.
Ego development and theoretical orientation among counseling students.
This study investigated potential relationships between master's level counseling students' levels of ego development and their identified orientations to one of six guiding theories of counseling; students' theoretical orientation classifications when classified according to the theory's domain of emphasis: affective, behavioral, or cognitive; students' degrees of confidence in identifying their theoretical orientations; and students' degrees of comfort in applying their theories in clinical practice. Seventy participants enrolled in a master's level practicum course completed the Washington University Sentence Completion Test, a measure of ego development, and the Counseling Theory Survey, a survey developed by the researcher, in order to identify students' identified theoretical orientations, students' degrees of confidence in identifying their theoretical orientations, and students' degrees of comfort in applying their theories in clinical practice. Ego development level was operationalized as a dichotomous variable consisting of level E5 and below and E6 and above, based on the developmental task attained at E6: a shift from emphasis on in-group identity to self-evaluated standards. To determine potential relationships between the students' ego development levels and their theoretical orientations and their orientations when classified by domain of emphasis, 2 x 4 and 2 x 3 Chi-square analyses were used. Independent t-tests were conducted to determine if the students' degrees of confidence in identifying their theoretical orientation and their degrees of comfort in applying their orientation varied across the two groups. No statistically significant results were found. Alternative explanations for the identification of theoretical orientation, limitations of the study, and suggestions for future research are discussed with emphasis on the need for greater integration of current theories related to the identification of theoretical orientation.
Ego Mechanisms of Defense among Child Victims of Sexual Abuse: a TAT Analysis
Using the Defense Mechanism Manual (Cramer, 1991), Thematic Apperception Test (TAT) stories of 29 sexually abused female subjects and 28 non-abused female clinical control subjects were rated for the frequency of use of denial, projection, and identification.
Ego Strength, Dogmatism, and Anxiety in College Students
It is the intent of this present study to investigate the nature of the relationships which might exist between ego strength, dogmatism, and anxiety.
Eight Original Short Stories : "A Rotten Way of Life" and Others
This thesis is a creative one, comprised of eight short stories which deal with a variety of subjects. All of the material is concerned with personal or vicarious experience.
The Eight Preludes for Piano of Frank Martin, a Lecture Recital, Together with Three Recitals of Selected Works of J.S. Bach, L.v. Beethoven, J. Brahms, F. Chopin, I. Albéniz, R. Schumann, A. Scriabin, F. Liszt, and K. Szymanowski
No Description Available.
Eight-Year Course of Cognitive Functioning in Bipolar Disorder with Psychotic Features
The purpose of the current study was to examine neuropsychological functioning in patients with bipolar disorder (BD) with psychotic features. Data from a large, epidemiological study of patients with first-episode psychosis was used to examine verbal learning and working memory 10 years after onset of psychosis in patients with BD relative to patients with schizophrenia (SZ) and patients with psychotic major depressive disorder (MDD). Cross-sectional comparisons of verbal learning and working memory at the 10-year follow-up mirrored findings of relative performance at the 2-year follow-up (Mojtabai, 2000), as patients with SZ performed significantly worse than patients with psychotic affective disorders. When FEP patients' cognitive performance was examined longitudinally, all groups showed non-significant decline over time, with no significant diagnostic group differences after accounting for current symptoms. More frequent hospitalizations and longer treatment with antipsychotics were associated with poorer performance on cognitive testing 10 years after illness onset, but these associations disappeared when controlling baseline cognitive performance. Within the BD sample, current positive and negative psychotic symptoms were associated with poorer performance on cognitive testing. After controlling for baseline cognitive performance, markers of clinical course were unrelated to cognitive performance, consistent with existing literature on longitudinal cognitive functioning in patients with BD. The current findings support a neurodevelopmental model of verbal learning and working memory deficits in patients with bipolar disorder.
Eighteenth-Century French Oboes: A Comparative Study
The oboe, which first came into being in the middle of the seventeenth century in France, underwent a number of changes throughout the following century. French instruments were influenced both by local practices and by the introduction of influences from other parts of Europe. The background of the makers of these instruments as well as the physical properties of the oboes help to illuminate the development of the instrument during this period. The examination of measurements, technical drawings, photographs, and biographical data clarify the development and dissemination of practices in oboe building throughout eighteenth-century France. This clarification provides new insight into a critical period of oboe development which has hitherto not been exclusively addressed.
Eighteenth-Century Rhetorical Figures in British Romantic Poetry: a Study of the Poetry of Coleridge, Wordsworth, Byron, Shelley, and Keats
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Eighth Grade Science Teacher Quality Variables and Student Achievement
While No Child Left Behind ushered in the age of the "highly qualified" teacher, accountability focus has been shifted to the "highly effective" teacher, defined as teacher impact on student achievement. The Science Texas Assessment of Knowledge and Skills (TAKS) is used to judge the adequate yearly progress of students in Texas public schools. Therefore, the purpose of this study was to examine the relationship of teacher factors (i.e., ethnicity, gender, teaching experience, university selectivity, certification route, National Center for Education Statistics Locale/Code, number of science content and pedagogical course semester credit hours, grade point average for science content and pedagogical coursework) on student achievement using the eighth grade Science TAKS. The primary dependent variables were students' five objective scores and their overall scores on the eighth grade Science TAKS examination. The sample was 44 eighth grade science teachers and 4,119 students in Texas public schools. Multiple linear regression models enabled examinations of the relationships between teacher quality variables and student achievement. No significant relationships between the variables were found. Small effect sizes for the beta weights and structure coefficients occurred between teachers' science credit hours and TAKS objectives to explain 20% of the variance for TAKS Living Systems and the Environment, 39% of the variance for TAKS Structures and Properties of Matter, and 21% of the variance for TAKS Earth and Space Systems. Teacher experience accounted for 24% of the variance with TAKS Structures and Properties of Matter, and pedagogical credit hours explained 30% of the variance with TAKS Motion, Forces, and Energy. Science GPA explained 31% of the variance for the TAKS Earth and Space Systems objective. Policy makers should examine NCLB assumptions about teacher content knowledge as a significant indicator of teacher effectiveness via student achievement on standardized tests. While measuring content knowledge provides a simple, efficient, ...
El ékfrasis en la Poesía De Manual Machado
Manuel Machado is known as one of the most innovative Spanish modernist poets of the twentieth century. Despite his recognition as a literary figure in Spain, the mimetic descriptions in Machado's poetics are interpreted as mere innovations in Spanish poetry. Those mimetic descriptions are examples of ekphrasis in Spanish literature. Ekphrasis is both a literary and representational art. The mimetic dimension in Machado's poetry is ignored or misinterpreted by the critics of his poetics. This study written in Spanish investigates the use of ekphrasis in terms of Machado's poetic style. An analysis of Manuel Machado's ekphrastic poems will determine: ekphrastic poetry is a representational art; how visual and acoustic aspects of Machado's poems create enargeia; and the manifestation of ekphrasis in Spanish verse. In using Machado's poems, this project will contribute to future explorations of ekphrasis in Spanish literature.
Elaboration and Content Analysis of Conceptual Structure in Posttraumatic Stress Disorder
Three recent studies attempted to substantiate Sewell and Cromwell's (1990) theory of Posttraumatic Stress Disorder (PTSD; American Psychiatric Association, 1994) based on personal construct theory (Kelly, 1955). One crucial aspect of the model that was tested in each of the studies is "elaboration," which is the process of bringing more of a person's repertoire of understanding (constructions) to a certain experience to give it meaning. Elaboration is representative of whether or not the individual is using an integrated set of constructs to deal with a traumatic event. A two-part study (1) reanalyzed existing data to assist in understanding discrepancies in past findings, and (2) content analyzed constructs given by subjects in all three studies. Findings concerning elaboration remained somewhat discrepant but suggested possible differences when investigating the emergent versus submerged poles of constructs.
Elasticity of Money as a Reinforcer: Assessing Multiple Compositions of Unit Price
Behavioral economics is the integration of concepts from micro-economics into behavior analysis. Most of the research in behavioral economics has been done with non-human subjects and with drugs as reinforcers. This study represents an extension of previous research to assess money as a reinforcer with humans as subjects. The participants in this study solved math problems to earn money at various unit prices. Results indicate that demand of money adhered to the law of demand in that consumption decreased as unit prices increased. An underlying assumption is that consumption should be equivalent at different compositions of unit price. Replications of either the same or different compositions of unit price indicated that there were some discrepancies in consumption in this study.
Elatio: praises and prophecies
ELATIO: Praises and Prophecies is an allegorical composition based upon a collection of carols, poetry and prose in selected verses, phrases and fragments from medieval Christian liturgy, the canonical Hebrew Bible (Old Testament) and New Testament, and portions of various non-canonical Dead Sea Scroll texts. The languages used in the selections presented here are English, Medieval Latin, and transliterated Biblical Hebrew.
Elder Abuse: A Multi-Case Study
This descriptive study with quantitative aspects examined the phenomenon of elder abuse through the systematic review of 60 cases of elder abuse. Cases were randomly selected from the files of an Adult Protective Services agency in the North Central Texas area. Research questions examined the characteristics of the victims and abusers, types and duration of abuse, descriptions of abusive situations, the reporting and verification of abuse, case management strategies utilized by caseworkers, and the consequences of those strategies. The results of this study point to the probability of the elderly abuse victim being 75 years of age or older, female, white, and widowed. There did appear to be some connection between race and type of abuse with white victims more likely to experience physical and financial abuse. Approximately half of the elderly abuse victims had severe limitations in physical and/or mental functioning leading to some degree of dependence upon their abusers. However, eighty percent of the elderly victims resided in their own homes and half of these individuals were functionally independent. This study provided descriptions of the various types of abuse that were observed: physical, financial, emotional, passive neglect, and active neglect. Financial abuse was noted most frequently, and multiple types of abuse were noted in most cases with the combination of physical, financial, and emotional abuse being observed most frequently. Fifteen different categories of case management strategies were examined, averaging four different assistance strategies per case. Legal services appeared to be the most often refused form of assistance. This study also found no evidence that those who abuse the elderly are being prosecuted.
Elder Abuse: Education for Persons with Experienced Violence
The rationale for this study was based on the application of the cycle of domestic violence theory to elder abuse. It examined the effect of history of experienced childhood violence on tolerance, behavioral intentions, and past behaviors of elder abuse toward general and specific elderly targets. The effectiveness of educational interventions for altering tolerance and behavioral intentions of elder abuse was examined. Two hundred and twenty-five undergraduates were assessed for aging knowledge, general aging attitudes, aging anxiety, elder abuse attitudes, and elder abuse intentions and past behaviors. Participants were assigned to a High or Low Experienced Violence group and participated in an educational group or control group. Posttest and one-month followup measures were obtained. No differences were found at pretest between High and Low Violence. Level of Violence did not impact intervention efficacy. Elder abuse education altered attitudes, intentions, and behaviors of elder abuse at posttest significantly more than did aging education or control groups (p < .001), but these effects were no longer significant at followup. Elder abuse attitudes had higher relationships with elder abuse intentions and reported past behaviors than did global aging attitudes or aging anxiety (p < .05). General elderly targets yielded more tolerance, intentions, and reported past behaviors of elder abuse than did specific elderly targets (p < .001). Experienced childhood abuse was unrelated to elder abuse expression yielding no support for the role of cycle of violence in elder abuse. Specificity of target mediated elder abuse attitudes, intentions, and behaviors. Primary prevention interventions which aim to reduce tolerance and intentions of elder abuse should include specific information on elder abuse; aging education is ineffective for this goal.
Electoral Behavior in Texas from 1944 Through 1972
"This report concludes that the evidence from the analyses seems to support the following propositions in regard to Texas electoral behavior. (1) The 1956 election year was a critical election year in Texas. (2) A pattern indicative of an underlying economic liberalism-conservatism was present in Texas voting patterns from 1944 through 1956, but not after. (3) The Mexican-American and German counties experienced political realignment in 1956 which continued through 1972. (4) The counties affording the most support to the liberal faction shift continuously. (5) The Texas electorate had been in a state of flux since 1956. To date no pattern other than the ethnic group realignment has stabilized. (6) Party-competition in gubernatorial elections has been increasing since 1962. (7) Ralph Yarborough has been the only liberal candidate for a major statewide office to draw support in a high and uniform degree across the state. (8) Ralph Yarborough's base of support has completely shifted since 1952. (9) The Farenthold vote was most closely aligned with that of Donald Yarborough. (10) Socio-economic factors have stronger relationship to Republican, liberal Democratic candidates, and major third party candidates than to conservative Democratic candidates. (11) All evidence form these analyses points to personalism and candidate appeal as the most important independent variables operating in Texas elections. " --leaf [3-4].
Electoral Rules, Political Parties, and Peace Duration in Post-conflict States
This dissertation examines the following research question: Which types of electoral rules chosen in post-conflict states best promote peace? And are those effects conditional upon other factors? I argue that the effects are conditional upon the types of political parties that exist in the post-conflict environment. Although this explanation is contrary to scholars that speak of political parties as products of the electoral system, political parties often predate the choice of electoral system. Especially in post-conflict states, political parties play an important role in the negotiation process and hence in the design of the electoral rules. I argue that the effects of electoral rules on peace duration are mitigated by the degree to which a party system is broad (nonexclusive) or narrow (exclusive). I develop a theoretical model that led to three hypotheses focusing on the independent role that political parties play in mitigating the effects of electoral rules on peace duration. To test these hypotheses, I use the Cox proportional hazard model on 57 post-conflict states from 1990 to 2009 and had competitive elections. The empirical results show support for the main argument of this study. First, the findings show that electoral rules alone do not increase or decrease the risk of civil war outbreak, yet when interacting with the degree to which political parties are broad or narrow, there is a significant effect on the outbreak of civil war. Second, the results show that post-conflict states with party centered electoral systems (closed list PR system) are less likely to have an outbreak of civil war when more seats in the parliament are controlled by broad-based parties. In addition, I conduct a comparative case study analysis of two post-conflict states, Angola (1975-1992) and Mozambique (1975-1994), using the most similar systems (MSS) research design.