196,684 research outputs found
Complex dynamics in a cobweb model with adaptive production adjustment
No full textChaos occurs in a nonlinear cobweb model with normal demand and supply, naive expectations and adaptive production adjustment. The model differs from existing ones in that it includes adaptive production adjustment instead of adaptive expectations. The model exhibits observable chaos (strange attractors) as well as topological chaos (horseshoes) associated with homoclinic points. As numerical simulations show, the faster suppliers adjust their production and the more inelastic demand is, the more likely the market behaves chaotically. (C) 2000 Elsevier Science B.V. All rights reserved
Stability, chaos and multiple attractors: a single agent makes a difference
No full textThis paper provides an example in which a slight behavioral heterogeneity may fundamentally change the dynamical properties of a nonlinear cobweb market with a quadratic cost function and an isoelastic demand function. We consider two types of producers; cautious adapters and naive optimizers. In a market of naive optimizers a single cautious, adapter stabilizes the otherwise exploding market. In a market of cautious adapters a single naive optimizer may destabilize the market; without him there exists at most one periodic attractor in the market but with him there may appear many (and even infinitely many) coexisting periodic attractors. (C) 2002 Elsevier Science B.V. All rights reserved
Dr. Duane M. Jackson, Morehouse College, July 2011
No full textThis video is a conversation with Dr. Duane M. Jackson. Dr. Jackson talks about his paper, "Recall and the Serial Position Effect: The Role of Primacy and Recency on Accounting Students' Performance." Jackie Daniel, AUC Woodruff Library, is the interviewer
Distributed Constraint Optimization as a Formal Model of Partially Adversarial Cooperation
No full textIn this paper, we argue that partially adversarial and partially cooperative (PARC) problems in distributed artificial intelligence can be mapped into a formalism called distributed constraint optimization problems (DCOPs), which generalize distributed constraint satisfaction problems [Yokoo, et al. 90] by introducing weak constraints (preferences). We discuss several solution criteria for DCOP and clarify the relation between these criteria and different levels of agent rationality [Rosenschein and Genesereth 85], and show the algorithms for solving DCOPs in which agents incrementally exchange only necessary information to converge on a mutually satisfiable solution. 1 Introduction In building a taxonomy of the field, researchers in Distributed Artificial Intelligence (DAI) have divided DAI research into two camps [Bond and Gasser 88]. One camp is distributed problem solving, which is concerned with how to get agents that are working on common problems to cooperate effectively. The m..
"Reflections on the subject of Emigration from Europe with a view to Settlement in the United States" By M. Carey.
No full text"Reflections on the subject of Emigration from Europe with a view to Settlement in the United States: containing bried sketches of the moral and political character of those states.
By M. Carey, member of the American philosophical, and of the American Antiquarian Society, and author of The Olive Branch, Cindiciae Hibernicae, essays on banking, on political economy, and on internal improvement.
To which are now added the English editor's comments on the subject; together with Important Advice to Emigrants, and Cautions Against Impositions Practiced in the Outports
Dispelling the Myths Behind First-author Citation Counts
No full textWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
Dr. Glendon Swarthout
No full textHosted by Roger M. Busfield, MSU Assistant Professor of Speech and Theater, Meet the Author is designed to introduce a general audience to a contemporary author and their work through in-depth interviews. This episode features a conversation between Dr. Glendon Swarthout, prolific author and English professor at MSU, and assistant professors Sam S. Baskett and Theodore B. Strandness
Programa de avaliação e melhoria da genética do rebanho Charolês da Embrapa Clima Temperado.
No full textPeso dos cortes comerciais do traseiro bovino como uma nova opção para o programa Brangus+.
No full textResumo: Até o ano de 2022, no Brasil, a raça Brangus não contava com um programa de avaliação e melhoramento genético oficial da Associação Brasileira de Brangus (ABB). Os existentes para a raça (Promebo, Natura e Geneplus) estimam, entre outros critérios de seleção, Diferenças Esperadas na Progênie (DEPs) de características avaliadas visualmente. Assim, devido à demanda dos criadores por características objetivas e para ter um programa chancelado pela ABB, a associação criou o Brangus+, que estima Diferenças Esperadas na Progênie aprimoradas pela Genômica (DEPGs) com critérios de seleção obtidos de forma objetiva, ou seja, sem características mensuradas de forma visual. Atualmente, o Brangus+ computa nove critérios de seleção (Reis et al., 2024): o efeito direto do peso ao nascer, os efeitos direto e materno do peso ao desmame, o efeito direto do peso ao sobreano, o efeito direto do perímetro escrotal ao sobreano e os efeitos diretos das características obtidas por ultrassom ao sobreano, como a área de olho de lombo (AOL), a espessura de gordura subcutânea entre as costelas (EG) e na garupa (EGP8) e a gordura intramuscular (GIM). Com o intuito de escolher animais superiores para qualidade da carcaça por meio desses critérios de seleção, o selecionador pode trabalhar com índices empíricos, agregando os pesos e as medidas feitas por ultrassom e selecionar animais geneticamente superiores que, por exemplo, podem agregar maior rendimento de carcaça, maior peso de carcaça quente (PCQ), entre outras características de importância econômica. Um exemplo de benefício financeiro utilizando um touro melhorador para o PCQ é demonstrado por Yokoo et al. (2015), onde o PCQ apresentou-se como uma boa alternativa de critério de seleção dos reprodutores geneticamente superiores para qualidade de carcaça, agregando maior renda ao sistema produtivo de até R 2,11 e publicaram um índice econômico de ciclo completo para a raça Brangus, em que o valor relativo das características de carcaça ficou em torno de 40% no índice final, demonstrando a importância econômica dos critérios de seleção relacionados à qualidade de carcaça no sistema produtivo brasileiro
- …
