PRODUCTION, PRICE AND RISK FACTORS IN CHANNEL CATFISH FARMING

The effects of several production/management, price and risk factors upon channel catfish profitability are analyzed with a multiperiod mixed-integer linear programming model. Factors analyzed include pond size and optimal stocking rates, alternate levels and trends in catfish prices, pond production losses and level of family consumption withdrawals. Model results indicate that channel catfish offer the potential to significantly increase farm rates of return while providing an avenue of intensive farm growth, without expanding the land base of the farm. However, the long range financial success of the firm was very sensitive to several of the management and risk factors examined.Production Economics, Risk and Uncertainty,

Exploring Agricultural Production Systems and Their Fundamental Components with System Dynamics Modelling

Agricultural production in the United States is undergoing marked changes due to rapid shifts in consumer demands, input costs, and concerns for food safety and environmental impact. Agricultural production systems are comprised of multidimensional components and drivers that interact in complex ways to influence production sustainability. In a mixed-methods approach, we combine qualitative and quantitative data to develop and simulate a system dynamics model that explores the systemic interaction of these drivers on the economic, environmental and social sustainability of agricultural production. We then use this model to evaluate the role of each driver in determining the differences in sustainability between three distinct production systems: crops only, livestock only, and an integrated crops and livestock system. The result from these modelling efforts found that the greatest potential for sustainability existed with the crops only production system. While this study presents a stand-alone contribution to sector knowledge and practice, it encourages future research in this sector that employs similar systems-based methods to enable more sustainable practices and policies within agricultural production

THE PRAGMATIC ROLE OF CODE-SWITCHING AND SIMULTANEOUS PRODUCTION DURING PLAY CONTEXTS OF BIMODAL BILINGUAL HEARING CHILDREN OF DEAF PARENTS

It is difficult, if not impossible to find another code-switching condition that allows for the production of simultaneous language use in communication like that which is found in bimodal bilingualism. In 2002, Bauer, Hall, and Kruth conducted a study that examined code-switching in a play context for a German/English bilingual child. Emmorey, Borinstein, and Thomson in 2005 investigated bimodal bilingualism in adults. However there has not been a study like these for hearing children using ASL/English who have Deaf parents. By applying Bauer, Hall, and Kruth\u27s study as a template for research into code-switching and adapting some of the processes used by Emmorey, Borinstein, and Thomson to research simultaneous sign and spoken language production, a study of hearing bimodal bilingual children of Deaf parents becomes possible. This study uses qualitative analysis of transcribed digital video recordings of two bimodal bilingual subjects that were coded to examine three language use possibilities in two language contexts. The bimodal subjects are capable of spoken English, manual Sign Language, and simultaneous production of both. The results were applied to answer the following questions: What kinds of play activity are the subjects and their adult interlocutors involved in? How do the subjects use their two languages to constitute their involvement in play? When and why do hearing children of Deaf parents code-switch? And when and why do they perform simultaneous production? The key findings are that bimodal bilingual children are strategic code-switchers/blenders using code selection to best communicate with their interlocutors based on the language environment and to fill lexical gaps or skill level deficiencies between codes

Enduring Methods - Editors' Introduction

Global Challenges (FSW