Modeling the transition to turbulence in shear flows

One-dimensional models are presented for transitional shear flows. The models have two variables corresponding to turbulence intensity and mean shear. These variables evolve according to simple equations based on known properties of transitional turbulence. The first model considered is for pipe flow. A previous study modeled turbulence using a chaotic tent map. In the present work turbulence is modeled instead as multiplicative noise. This model captures the character of transitional pipe flow and contains metastable puffs, puff splitting, and slugs. These ideas are extended to a limited model of plane Couette flow.Comment: ETC13 Conference Proceeding, 8 pages, 6 figure

DISCUSSION: IMPLICATIONS OF THE 1980S FOR AGRICULTURE AND RURAL COMMUNITIES IN THE WEST

Teaching/Communication/Extension/Profession,

AN ANALYSIS OF ONLINE EXAMINATIONS IN COLLEGE COURSES

This research evaluates the use of online examinations in college courses from both instructor and student perspectives. Instructional software was developed at Kansas State University to administer online homework assignments and examinations. Survey data were collected from two classes to measure the level of student support for online examinations. The determinants of the level of student support for online testing were identified and quantified using logistic regression analysis.Teaching/Communication/Extension/Profession,

“Academic Coaching” for Enhanced Learning, Higher Levels of Student Responsibility, and Greater Retention

The relationship between teachers and students has changed. Many writers have put forth hypotheses and ideas about how the current generation of students (Gen‐Y; the “Me Generation”) differs from previous generations. Others focus on teaching methods, course strategies, and technological tools that are effective in the new environment. The objective of this research is to investigate the possibility of “academic coaching” for enhanced student responsibility, higher levels of learning, and greater retention. The concept of “academic coaching” refers to a relationship between teachers and students that is proactive, responsive to student learning outcomes, and committed to student success. The teacher/learner relationship becomes less like a formal instructor and more like a coach.academic coaching, effective teaching, generational change, teaching practices, Teaching/Communication/Extension/Profession,

AN ANALYSIS OF ONLINE EXAMINATIONS IN COLLEGE COURSES

This research evaluates the use of online examinations in college courses from both instructor and student perspectives. Instructional software was developed at Kansas State University to administer online homework assignments and examinations. Survey data were collected from two classes to measure and evaluate the level of student preferences for online examinations. The statistical determinants of student preferences for online testing were identfied and quantified using logistic regression analysis. Strategies for the effective use of online examinations are summarized for potential adopters of online examinations.online examinations, student learning, teaching technology, undergraduate teaching, Teaching/Communication/Extension/Profession, A22,

ECONOMIC DEVELOPMENT IN SOUTH CAROLINA: AN OVERVIEW OF RECENT TRENDS AND FUTURE PROSPECTS

This paper summarizes recent employment and earnings trends in South Carolina and reviews changes in the competitive environment that may impact future employment opportunities and earnings for the state's workers. The new competitive environment is characterized by greater global competition, a continuting shift from goods-producing to service-producing industries, new production organizations and technologies, and industrial restructuring. The implications of these structural changes for the state's businesses and workers are discussed, and public policy initiatives to prepare for these changes are suggested.Community/Rural/Urban Development,

LABOR MOBILITY AMONG AGRICULTURAL COLLEGE GRADUATES: A HUMAN CAPITAL APPROACH

Determinants of job mobility and job advancement were motivated from a model of investment in human capital. Least squares and Tobit models were specified and estimated using data from a recent survey of Kansas State University College of Agriculture graduates. Determinants of job turnover and the number of promotions earned were quantified. Job change and job advancement were found to occur early in the careers of agriculture college alumni. Job experience was found to be the most significant determinant of labor mobility and promotion. Personal and occupational characteristics were found to have significant but small impacts on labor mobility and advancement.Labor and Human Capital,

WHEN KENNETH BOULDING SPOKE TO AGRICULTURAL ECONOMISTS

Teaching/Communication/Extension/Profession,

EMPLOYMENT GENERATION STRATEGIES FOR SMALL TOWNS: AN OVERVIEW OF ALTERNATIVES

Employment growth is a primary economic development goal of most small communities. More jobs generally mean more residents, more spending at local businesses, and more tax revenues for local governments. Thus job growth permits the expansion and improvement of public goods and services, leading to an improved local quality of life and enhanced prospects for future employment growth. The purpose of this paper is to summarize the principal advantages and disadvantages associated with alternative employment generation strategies. The discussion of community approaches to more and better jobs is organized as follows. First, two theories of community economic growth are presented as background to the causes and effects of local employment change. Second, six employment generation strategies are introduced along with suggested plans of action for communities interested in implementing a specific strategy. Finally, a procedure is provided for incorporating an employment generation program in the community economic development strategic plan.Labor and Human Capital,

TOWARD A DEVELOPMENT POLICY FOR RURAL AMERICA

Community/Rural/Urban Development,