A computational algorithm for crack determination: The multiple crack case

An algorithm for recovering a collection of linear cracks in a homogeneous electrical conductor from boundary measurements of voltages induced by specified current fluxes is developed. The technique is a variation of Newton's method and is based on taking weighted averages of the boundary data. The method also adaptively changes the applied current flux at each iteration to maintain maximum sensitivity to the estimated locations of the cracks

Housing Reform and the Ghetto Law in the Time of Covid

This short personal essay considers the principles behind housing reform in New York at the turn of the last century in light of the controversies around the ghetto law in contemporary Denmark. I take the example of documentary journalist and reformer Jacob Riis, who photographed housing conditions in immigrant neighbor-hoods on the Lower East Side in New York at the turn of the twentieth century, as a case study for considering the ways that race informed—and continues to inform—ideals around urban planning. Conversely, I also consider contemporary controversies around the ghetto law, and activism by community members as a way of re-thinking a research approach to historical urban reforms

Rotational cooling of molecules using lamps

We investigate theoretically the application of tailored incoherent far-infrared fields in combination with laser excitation of a single rovibrational transition for rotational cooling of translationally cold polar diatomic molecules. The cooling schemes are effective on a timescale shorter than typical unperturbed trapping times in ion traps and comparable to obtainable confinement times of neutral molecules.Comment: 5 pages, 2 figure