A transition model (MOSAIC) is used to describe forest dynamics at the landscape scale. The model uses a semi-Markov framework by considering transition probabilities and Erlang distributed holding times in each transition. Parameters for the transition model are derived from a gap model (ZELIG). This procedure ensures conceptual consistency of the landscape model with the fine scale ecological detail represented by the forest gap model. Spatial heterogeneity in the transition model is driven by maps of terrain with characteristics contained in a Geographic Information System (GIS) database. The results of the transition model simulations, percent cover forest type maps, are exported to grid-maps in the GIS. These cover type maps can be classified and used to describe forest dynamics using landscape statistics metrics. The linkage model-GIS enhances the transition model spatial analytical capabilities. A parameterization algorithm was developed that takes as input gap model tracer files which contain the percent occupation of each cover type through time. As output, the algorithm produces a file that contains the parameter values needed for MOSAIC for each one of the possible transitions. Parameters for the holding time distribution were found by calculating an empirical estimate of the cumulative probability function and using a …

The purpose of this study was to determine the optimal form and timing of feedback to establish a "new" behavior. It examined the relative effectiveness of delivering a corrective feedback immediately before the learner responds to a previously incorrect trial as compared to delivering a corrective feedback immediately after the incorrect response is made. Corrective feedback delivered immediately before the next opportunity to respond produced better learning than corrective feedback delivered immediately after a response. The Feedback Before condition decreased errors during training and increased acquisition rates. Results also indicated an interaction between time of feedback delivery and the complexity of the task. As the task complexity increased, the results were more dramatic in favor of the Feedback Before condition.

Nucleon structure functions measured in neutrino-iron and antineutrino-iron charged-current interactions are presented. The data were taken in two high-energy high-statistics runs by the LAB-E detector at the Fermilab Tevatron. Structure functions are extracted from a sample of 950,000 neutrino and 170,000 antineutrino events with neutrino energies from 30 to 360 GeV. The structure functions F{sub 2} and xF{sub 3} are compared with the predictions of perturbative Quantum Chromodynamics (PQCD). The combined non-singlet and singlet evolution in the context of PQCD gives value of {Lambda}NLO,(4)/MS = 337 {+-} 28 (exp.) MeV, which corresponds to {alpha}{sub S}(M{sub Z}{sup 2}) = 0.119 {+-} 0.002 (exp.) {+-} 0.004 (theory), and with a gluon distribution given by xG(x,Q{sub 0}{sup 2} = 5GeV{sup 2}) = (2.22 {+-} 0.34) {times} (1 {minus} x){sup 4.65{+-}0.68}.

The purposes of the study were to examine the psychosocial variables of hostility and social support, and their independent relationships with resting physiological levels and chronic pain symptoms, and to examine the independent relationships of chronic pain chronicity and social support with hostility.

The purpose of this study was to examine the degree to which several psychological and personality variables relate to anorexic and bulimic symptomatology in female undergraduates. Past research investigating the relationship between such variables and eating disorders has been contradictory for several reasons, including lack of theoretical bases, discrepant criteria, or combination of anorexia and bulimia nervosa. Recent investigators have concluded that it is important to examine subdiagnostic levels of eating pathology, especially within a college population. Thus, the present investigation used a female undergraduate sample in determining the extent to which several psychological factors--obsessiveness, dependency, over-controlled hostility, assertiveness, perceived control, and self-esteem--account for anorexic and bulimic symptomatology. Regression analyses revealed that anorexic symptoms were best explained by obsessiveness and then two measures of dependency, emotional reliance on another and autonomy. Bulimic symptoms were related most strongly to lack of social self-confidence (a dependency measure) and obsessiveness. Clinical implications and directions for future research are addressed.

Several biomarkers (cell viability and phagocytosis) based on earthworm (Lumbricus terrestris) immune cells (coelomocytes), together with whole-worm mortality (LC/LD50's), were used to assess a bioremediation attempt to reduce pentachlorophenol (PCP) toxicity in a former wood processing hazardous waste site (HWS).

The purpose of this thesis is to analyze the use of alchemy within the work of Rebecca Horn, to elucidate its presence in her work, and to illuminate its purpose as a personal philosophy and as a creative tool. The use of alchemy within Horn's work occurs as a process of revelation and transformation. Alchemy is revealed as a spiritual philosophy and as an interpretative system through the changes that occur in Horn's oeuvre. Throughout Horn's career, alchemy has developed into an interpretive system, a type of spiritual and cosmic perspective, that allows the artist to study, access, and meld diverse realities (sacred and profane) and diverse social systems (religious and scientific) into a more holistic and spiritually infused reality for herself and society-at-large. The purpose of her work is to help reinvest contemporary life with a spiritual presence by offering a model and a means of bringing the sacred into the profane.

This study was designed to determine the effectiveness of filial therapy training in: (a) increasing immigrant Chinese parents' empathic behavior with their children; (b) increasing immigrant Chinese parents' acceptance level toward their children; (c) reducing immigrant Chinese parents' stress related to parenting; (d) reducing immigrant Chinese parents' perceived number of problem behaviors in their children; and (e) enhancing the self concept of the Chinese children of immigrant Chinese parents.

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 …

There has been an interest in the kinetics of the V02 response during exercise at various intensities. However, most studies focus on the response of submaximal intensities whereas few studies have examined V02 kinetics at severe intensities. The purpose of this study was to evaluate the effect of exercise intensity on V02 kinetics over a range of severe intensities.

This investigation was concerned with determining the effectiveness of filial therapy as a method of intervention for families of children with pervasive developmental disorders.

It is not an exaggeration to say that much of chemistry involves ions in solution. A technique which allows for ions to be transferred from solution into the gas phase and subsequently analyzed by mass spectrometric detection would be of importance. If structural information, representative of the solution chemistry could be gained from these gas-phase ions, this would also be important. Electrospray mass spectrometry (ES-MS) is such a technique.

The purpose of this study is to investigate the possible relationship between social interest and marital adjustment in a selected group of married couples. Another variable relating to spiritual well-being and religious participation is also considered. In the studies reviewed, the concept of social interest as proposed by Adler has been supported as a psychological construct. It has generally correlated with characteristics that are viewed as social interest components. By contrast, it has generally related negatively with characteristics that are inconsistent with the concept. Of the investigations conducted, most have focused on the relationship between social interest and some aspect of individual functioning, such as psychological well-being, health, mood states, and locus of control. There has been little investigation between social interest and some aspect of individual functioning, such as psychological well-being, health, mood states and locus of control. There has been little investigation between social interest and marital satisfaction and, additionally, the possible relationship to religious participation. The results of this study support a positive relationship between social interest and marital satisfaction, a positive relationship[ between social interest and religious participation, and a positive relationship between marital satisfaction and religious participation.

This study described and explored perceptions of the context and behaviors of seven 4-year-old children whose parents attended a parenting education program. The problem was to explore a group of 9 volunteer parents' perceptions of their parenting styles and perceptions of their 4-year-old children at home while the parents participated in, and completed, a minimum of 4 out of 6 Active Parenting Today parenting education classes. Volunteer parents were recruited during public school registration for prekindergarten. In addition, perceptions of 4 teachers and 4 classroom educational aides in regard to behaviors of the 4-year-old children whose parents participated in and completed the Active Parenting Today program were explored.

This study traced the development of the Equity 2000 Program in the Fort Worth Independent School District from its inception in 1990 to its sixth and final year as an exemplary program for equal access to higher education for minority and underserved youth. Program components included mathematics, counseling, staff development, academic enrichment activities, parent education and higher education linkages. Both primary and secondary sources were evaluated from the perspectives of internal and external criticism. The following conclusions were reached: 1) District policy must change if minority students are going to access algebra and geometry. 2) The lack of involvement of other curriculum areas created primarily a mathematics inservice program. 3) Required inservice was necessary to provide improved and more effective campus and district results. 4) The precollege guidance and counseling component needed integration with the mathematics component. 5) Lack of principals' involvement in the early development of the program contributed to uneven administrative support. 6) There was no definitive strategy for parental inclusion. 7) Funding sources were inadequate to fully implement all parts of the program. 8) There was limited participation of local institutions of higher education. 9) There was a lack of an ongoing, structured evaluation process to document …

The purpose of this study was to examine the effect of the level of teachers' self-esteem on student achievement. This study surveys and analyzes factors of teachers' self-esteem. Its results are based on (1) a review of the literature to develop an understanding of historical perspectives and research, (2) the factors involved in the development of self-esteem, (3) the role of the parents, and (4) the role of the teacher. Forty-three teachers of grades three and five in North Central Texas completed the Gordon Personal Profile-Inventoiy to assess their levels of self-esteem. Six teachers with mid-range scores were eliminated from the study. The remaining 37 teachers were divided into high and low self-esteem categories. Students' Texas Learning Index scores on the Texas Assessment of Academic Skills were matched with the appropriate teachers' scores. The findings of the study indicate that the students with teachers in the high level of self-esteem category scored an average of 5.67 points higher than those students with teachers in the low level of self-esteem categoiy. Findings resulting from the study led to the conclusion that teachers with high levels of self-esteem have a positive influence on the achievement of their students.

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.

A prospective ecological risk assessment method was developed evaluating the cumulative probabilistic impact of chemical stressors to aquatic organisms. This method was developed in response to the need to evaluate the magnitude, duration and episodic nature of chemical stressors on aquatic communities under environmental exposure scenarios. The method generates a probabilistic expression of the percent of an ecosystem's species at risk from a designated chemical exposure scenario.

This study was designed to determine the effectiveness of the Landreth 10-week filial therapy model as an intervention for the parents of children experiencing learning difficulties.The purpose of this study was to determine if filial therapy is effective in: 1) increasing parental acceptance of children with a learning difficulty; 2) reducing the stress level of parents of children with learning difficulties; 3) decreasing social problems and total behavior problems of children with learning difficulties as reported by parents and teachers.

This study analyzed the effect of technology integration education on teachers' and students' attitudes toward information technology. Two instruments measuring similar attributes were used to assess teachers' and students' attitudes. Differences in pre- and post-test scores were used to determine changes that occurred during the course of the study.

Using a manufacturing setting that is organized into self-managed teams, the current study identified and measured key leadership behaviors within the teams. Questions that were asked include: are some team leadership behaviors more critical to a team's level of functioning than other behaviors? and do successful self-managed teams rely on formal leadership to a lesser extent than members of less successful teams? These questions were asked in the context of leadership as a process, not an individual.

Rapid and chaotic changes in market environments have caused business organizations to modify their organizational structures and social relationships. This paper examines the change in relationship between management and employees, which is shifting from an adversarial and controlling role to facilitation and employee empowerment. This paper's research question concerns how classical sociological theory would explain power redistribution within organizations and the formation of an associative and collaborative relationship which contradicts traditional paradigms. Traditional bureaucratic and contemporary organizational forms are compared and contrasted. Organizational climate, psycho-social components of underlying assumptions and group ethics are seen to be the mechanisms impelling transformation. Organizational change is driven by an emerging secular ethic. This ethic is embodied in an applied model of leadership and examined as an ideal type. The common ethic impelling organizational change is seen to be the same as that causing social transformation in both national and international spheres.

The purpose of this study was to investigate the effects of four learning styles (accommodator, assimilator, converger, and diverger) and two different presentation methods (traditional and computer-based) on knowledge acquisition in a university classroom.

Wilderness landscape, a setting common in Romantic literature and painting, is generally overlooked in the art of the Middle Ages. While the medieval garden and the city are well mapped, the medieval wilderness remains relatively trackless. Yet the use of setting to represent interior experience may be traced back to the Neo-Platonic use of space and movement to define spiritual development. Separating themselves as far as possible from the material world, such writers as Origen and Plotinus avoided use of representational detail in their spatial models; however, both the visual artists and the authors who adopted the Neo-Platonic paradigm, elaborated their emotional spaces with the details of the classical locus amoenus and of the exegetical desert, while retaining the philosophical concern with spiritual transition. Analysis of wilderness as an image for spiritual and emotional transition in medieval literature and art relates the texts to an iconographic tradition which, along with motifs of city and garden, provides a spatial representation of interior progress, as the medieval dialectic process provides a paradigm for intellectual resolution. Such an analysis relates the motif to the core of medieval intellectual experience, and further suggests significant connections between medieval and modern narratives in regard to the …