3-D Simulation of Flexible Hypersonic Vehicles

Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/83653/1/AIAA-2010-8229-935.pd

Effect of Control Surface-Fuselage Inertial Coupling on Hypersonic Vehicle Flight Dynamics

Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/90732/1/AIAA-2011-6378-636.pd

Anomalous relaxation kinetics of biological lattice-ligand binding models

We discuss theoretical models for the cooperative binding dynamics of ligands to substrates, such as dimeric motor proteins to microtubules or more extended macromolecules like tropomyosin to actin filaments. We study the effects of steric constraints, size of ligands, binding rates and interaction between neighboring proteins on the binding dynamics and binding stoichiometry. Starting from an empty lattice the binding dynamics goes, quite generally, through several stages. The first stage represents fast initial binding closely resembling the physics of random sequential adsorption processes. Typically this initial process leaves the system in a metastable locked state with many small gaps between blocks of bound molecules. In a second stage the gaps annihilate slowly as the ligands detach and reattach. This results in an algebraic decay of the gap concentration and interesting scaling behavior. Upon identifying the gaps with particles we show that the dynamics in this regime can be explained by mapping it onto various reaction-diffusion models. The final approach to equilibrium shows some interesting dynamic scaling properties. We also discuss the effect of cooperativity on the equilibrium stoichiometry, and their consequences for the interpretation of biochemical and image reconstruction results.Comment: REVTeX, 20 pages, 17 figures; review, to appear in Chemical Physics; v2: minor correction

Six-Degree-of-Freedom Simulation of Hypersonic Vehicles

Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/77268/1/AIAA-2009-5601-114.pd

Hypersonic Vehicle Flight Dynamics with Coupled Aerodynamic and Reduced-Order Propulsive Models

Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/83644/1/AIAA-2010-7930-291.pd

Inflated Expectations: How Government Partisanship Shapes Monetary Policy Bureaucrats’ Inflation Forecasts

Governments’ party identifications can indicate the types of economic policies they are likely to pursue. A common rule of thumb is that left-party governments are expected to pursue policies for lower unemployment, but which may cause inflation. Right-party governments are expected to pursue lower inflation policies. How do these expectations shape the inflation forecasts of monetary policy bureaucrats? If there is a mismatch between the policies, bureaucrats expect governments to implement, and those that they actually do, forecasts will be systematically biased. Using US Federal Reserve Staff’s forecasts we test for executive partisan biases. We find that irrespective of actual policy and economic conditions forecasters systematically overestimate future inflation during left-party presidencies and underestimate future inflation during right-party ones. Our findings suggest that partisan heuristics play an important part in monetary policy bureaucrats’ inflation expectations