Most Popular Books by David Jacobson

A numerical finite difference method is developed to solve the three dimensional laminar/turbulent boundary layer equations on a spinning body of revolution at an angle of attack in supersonic flow. Influence of asymmetric transition and the presence of mixed boundary layers is considered to predict Magnus forces and moments. Several contributions to the Magnus effects are considered. These include asymmetric boundary layer displacement thickness, centrifugal pressure, and primary and cross flow wall shear stresses. Boundary layer structure defined by asymmetric transition is shown to critically influence the aerodynamic forces and moments on bodies of revolution. Important variables in the flow field are identified by considering variations of spin rate, Mach number, angle of attack and length of the body. Comparisons are made with experimental data and other theoretical analyses. (Author).

While Farmer Jake tends the prairie grass on his Central Minnesota farm, he develops a special relationship with a mother killdeer he names Mabel. While she waits for her four eggs to hatch, Farmer Jake earns her trust by talking to them and not invading their private space. As they leave the nest, Mabel and her mate teach the four young killdeer everything they need to know to survive and be strong enough to fly to Mexico for the winter.

Abstract: Construction of accurate potential energy (PE) surfaces for molecular systems is one of the primary tasks performed by theoretical physical chemists. Once in hand, these PE functions can be used to study the dynamics and spectroscopies, as well as the structures and properties of molecular systems. This study focuses on approximating many-body electronic induction in order to improve the accuracy of existing potentials and improve the efficiency of {em{ab initio}} methods in order to allow ``on-the-fly" energy and force evaluations in dynamical calculations.