University of North Texas

About: University of North Texas is a education organization based out in Denton, Texas, United States. It is known for research contribution in the topics: Population & Poison control. The organization has 11866 authors who have published 26984 publications receiving 705376 citations. The organization is also known as: Fight, North Texas & UNT.

Leadership theory: past, present and future

Abstract: Organizations have changed over the past several decades with regard to the structuring of work methods and processes. Moving away from the traditional hierarchical design, most organizations are developing flatter, leaner structures that support a more empowered, team‐based workforce. The nature of leadership has also changed significantly over time. Building on the body of work that has been done to understand leadership, the current paper explores the various theories of leadership and how these theories have changed over time. Starting with a review of work done on leadership, the trends and changes over time are discussed. In addition, characteristics of successful leaders are identified. Given current developments in organizations, a call for change is presented in the context of teams and team leadership. A modified view of leadership is proposed that may be more appropriate in team‐based structures.

Expectations and Performance: An Empirical Test of Bandura's Self-efficacy Theory

Abstract: The present investigation was designed to test the predictions of Bandura's (1977) theory of self-efficacy in a competitive, motor-performance situation. Subjects (30 males and 30 females) were randomly assigned to either a high or low self-efficacy condition in a 2 × 2 × 2 (sex × self-efficacy × trials) factorial design. Self-efficacy was manipulated by having subjects compete against a confederate on a muscular leg-endurance task where the confederate was said to be either a varsity ;rack athlete who exhibited higher performance on a related task (low self-efficacy) or an individual who had a knee injury and exhibited poorer performance on a related task (high self-efficacy). Because self-efficacy theory predicts that expectation-performance differences are maximized in the face of obstacles and aversive consequences, the experiment was rigged so that subjects lost in competition to the confederate on both trials. The results supported self-efficacy predictions with the high self-efficacy subjects exten...

An intimate collaboration between peroxisomes and lipid bodies

Abstract: Although peroxisomes oxidize lipids, the metabolism of lipid bodies and peroxisomes is thought to be largely uncoupled from one another. In this study, using oleic acid–cultured Saccharomyces cerevisiae as a model system, we provide evidence that lipid bodies and peroxisomes have a close physiological relationship. Peroxisomes adhere stably to lipid bodies, and they can even extend processes into lipid body cores. Biochemical experiments and proteomic analysis of the purified lipid bodies suggest that these processes are limited to enzymes of fatty acid β oxidation. Peroxisomes that are unable to oxidize fatty acids promote novel structures within lipid bodies (“gnarls”), which may be organized arrays of accumulated free fatty acids. However, gnarls are suppressed, and fatty acids are not accumulated in the absence of peroxisomal membranes. Our results suggest that the extensive physical contact between peroxisomes and lipid bodies promotes the coupling of lipolysis within lipid bodies with peroxisomal fatty acid oxidation.

Individual Behavior, Culture, and Social Change

Abstract: The principle of operant selection is examined as a prototype of cultural selection, and the role of the social environment is suggested as the critical element in the emergence of cultural phenomena. Operant contingencies are compared to cultural selection contingencies, designated as metacontingencies. Both of these types of contingency relations result in evolving lineages of recurrences that can become increasingly complex in the number and organization of their elements. In addition to its role in the recurring interlocking behavioral contingencies that constitute cultural organization, operant behavior plays another role in cultures. Although the operants of individuals are functionally independent of one another, the behavior of each person may contribute to a cumulative effect that is relevant to the well-being of many people. Similarly, the outcomes of metacontingencies may also contribute to a cumulative effect. The relation between independently evolving operant lineages, or between independently evolving cultural lineages, and their cumulative effect is identified as a macrocontingency. Macrocontingencies do not involve cultural-level selection per se. Effective cultural engineering requires identifying the macrocontingencies that produce less than desirable effects and altering the relevant operant contingencies or metacontingencies to produce change in the cumulative effects.

Sometimes You Just Have to Leave: Domestic Threats and Forced Migration, 1964-1989

Abstract: In this study we explore why persons flee their homes to become refugees and internally displaced persons. We contend that individuals will tend to flee when the integrity of their person is threat...