Rotating stall is a primary constraint for the performance of axial #ow compressors. This paper establishes a necessary and su$cient condition for a feedback controller to locally stabilize the critical equilibrium of the uniform #ow at the inception of rotating stall. The explicit condition obtained in this paper provides an e!ective synthesis tool for rotating stall control. 2001 Elsevier Sci...

We consider a loosely-coupled algorithm for fluid-structure interaction based on Robin interface condition the fluid problem (explicit Robin-Neumann scheme). study dependence of stability this method parameter in condition. In particular, model we find sufficient conditions instability and method. latter case, relating time discretization parameter, structure densities. Numerical experiments co...

Under certain circumstances, implicit, automatic learning may be attenuated by explicit memory processes. We explored the brain basis of this phenomenon in a functional magnetic resonance imaging (fMRI) study of motor sequence learning. Using a factorial design that crossed subjective intention to learn (explicit versus implicit) with sequence difficulty (a standard versus a more complex altern...

Recent research has shown that alcohol consumption can exacerbate expressions of racial bias by increasing reliance on stereotypes. However, little work has investigated how alcohol affects intergroup evaluations. The current work sought to address the issue in the context of the correspondence between implicit and explicit measures of anti-black attitudes. Participants were randomly assigned t...

We propose a novel approach to optimum inventory control by modeling a commodity trader’s inventory investment as a portfolio of forward commitments taking explicit account of the dynamics of demands, costs and prices in open markets. We apply the robust real-asset martingale valuation methodology to derive a closed-form solution for the inventory value and a simple and intuitive optimality con...

Two-stage stochastic programs with random right-hand side are considered. Optimal values and solution sets are regarded as mappings of the expected recourse functions and their perturbations, respectively. Conditions are identiied implying that these mappings are directionally diierentiable and semidiieren-tiable on appropriate functional spaces. Explicit formulas for the derivatives are derive...

We study the Cauchy problem for the Hamilton-Jacobi equation with a semi-concave initial condition. We prove an inequality between the two types of weak solutions emanating from such an initial condition (the variational and the viscosity solution). We also give conditions for an explicit semi-concave function to be a viscosity solution. These conditions generalize the entropy inequality charac...

We investigated how the statistical learning of auditory sequences is reflected in neuromagnetic responses in implicit and explicit learning conditions. Complex tones with fundamental frequencies (F0s) in a five-tone equal temperament were generated by a formant synthesizer. The tones were subsequently ordered with the constraint that the probability of the forthcoming tone was statistically de...

Increasingly, hate groups have used the Internet to express their viewpoints, sell their paraphernalia, and recruit new members. This study explored the effectiveness of persuasive storytelling found on White supremacist Web pages. One hundred eight adolescents participated in a longitudinal study (pretest, Time 1, Time 2) conducted online. A 3 (receptivity: negatively inclined, neutral, predis...

The workspace topologies of a family of 3-revolute (3R) positioning manipulators are enumerated. The workspace is characterized in a half-cross section by the singular curves. The workspace topology is defined by the number of cusps that appear on these singular curves. The design parameters space is shown to be divided into five domains where all manipulators have the same number of cusps. Eac...