From at least the time of Thomas Edison, U.S. engineers have used the word “bug” to refer to flaws in the systems they developed. This short word conveniently covered a multitude of possible problems. It also suggested that difficulties were small and could be easily corrected. IBM engineers who installed the ASSC Mark I at Harvard University in 1944 taught the phrase to the staff there. Grace ...

Recent results from the Mark II Detector at SPEAR are presented. These include measurements of the decays r--to-vr and T-+K*-(890)~,, observation of direct photons at the $, inclusive proton and A production and measurements of charmed baryon and charmed meson decays.

Although extrinsic and intrinsic motivation likely jointly explain the effort of many agents engaged in public service delivery, incentives typically only appeal to the former. In the context of a rural health worker program in India, I develop and test a novel, mobile phone-based selftracking app designed to increase agents’ intrinsic returns to effort. At ten months of follow-up, the self-tra...