This paper studies the complexity of the decision system when a brand enterprise introduces new products and makes dynamic quality decisions to cope with imitation threats caused by a copyright enterprise.Using game theory, nonlinear system theory, and numerical simulation, the complexity characteristics of this system and consumer utility are furt
Background: The COVID-19 pandemic disproportionately impacted Black Americans.Rates of hospitalization, mortality, and morbidity increased and racial inequities in unemployment, job benefits, and working conditions widened.This study identifies specific factors associated Teeth Whiteners with the well-being of Black adults in the U.S.workforce one
Abstract Dental enamel is subjected to a lifetime of de- and re-mineralization cycles in the oral environment, the cumulative effects of which cause embrittlement with age.However, the understanding of atomic scale mechanisms of dental enamel aging is still at its infancy, particularly regarding where compositional differences occur in the hydroxya
We explore the estimation of a two-dimensional (2D) nonsymmetric coherently distributed (CD) source using L-shaped arrays.Compared with a symmetric source, the modeling and estimation of a nonsymmetric source are more practical.A nonsymmetric CD source is established through modeling the deterministic angular signal distribution function as a summa
Abstract Background Lactation increases energy demands four- to five-fold, leading to a two- to three-fold increase in food consumption, requiring a proportional adjustment in the ability of the lactating dam to absorb nutrients and to synthesize critical biomolecules, such as cholesterol, to meet the dietary needs of both the offspring and the dam