A method is presented to model the incompressible, attached, unsteady lift and pitching moment acting on a thin three-dimensional wing in the time domain. The model is based on the combination of Wagner theory and lifting line theory through the unsteady Kutta–Joukowski theorem. The results are a set of closed-form linear ordinary differential equations that can be solved analytically or using a Runge–Kutta–Fehlberg algorithm. The method is validated against numerical predictions from an unsteady vortex lattice method for rectangular and tapered wings undergoing step or oscillatory changes in plunge or pitch. Further validation is demonstrated on an aeroelastic test case of a rigid rectangular finite wing with pitch and plunge degrees of freedom.

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The level scheme of the odd proton nucleus 159H0 has been investigated using Ge(Li) and Si(Li) detectors. Results of 7-ray singles, conversion electron spectra and coincidence experiments are reported. Assignments are made for several energy levels.

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High-spin states in 154Er have been populated by bombarding 147Sm and 148Sm with t2C particles. Excitation functions, lifetimes, angular distributions and 7-7 coincidences were measured. A T1/2=35 ns isomeric state at Ex~3 MeV has been found and is interpreted as a two-quasi-particle state with aligned angular momenta. A cascade of intense individual lines from states with spin up to at least 26 (excitation energy up to 8.543 MeV) was found to feed the isomeric state. The level sequence above this yrast trap exhibits an irregular pattern which cannot be easily interpreted in terms of collective modes.

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