We present two exoplanets detected at Keck Observatory. HD 179079 is a G5 subgiant that hosts a hot Neptune planet with M sin i = 27.5 M⊕ in a 14.48 d, low-eccentricity orbit. The stellar reflex velocity induced by this planet has a semiamplitude of K = 6.6 m s. HD 73534 is a G5 subgiant with a Jupiter-like planet of M sin i = 1.1 MJup and K = 16 m s −1 in a nearly circular 4.85 yr orbit. Both ...

The present regulatory climate has led to increasing demands for scientists to attest to the predictive reliability of numerical simulation models used to help set public policy, a process frequently referred to as model validation. But while model validation may reveal useful information, this paper argues that it is not possible to demonstrate the predictive reliability of any model of a comp...

Most courses based on distance learning focus on the cognitive domain of learning. Because students are sometimes inattentive or tired, they may neglect the attention goal of learning. This study proposes an autodetection and reinforcement mechanism for the distance-education system based on the reinforcement teaching strategy. If a student is detected to be inattentive or fatigued, then the al...

This paper presents a model in which some consumers shop on the basis of price alone, without attention to product quality. A firm may “cheat” (i.e., cut quality) to exploit these inattentive consumers. In the unique symmetric equilibrium, firms follow a mixed strategy involving both price and quality dispersion. Firms are less likely to cheat when there are fewer inattentive consumers, which i...

This paper analyzes an infinite horizon dynamic duopoly with stochastic demand in which firms face planning costs. In this set-up we derive the following results. First, non-synchronized planning equilibria can only exist if products are strategic substitutes while synchronized planning equilibria can only exist if products are strategic complements. This result is in sharp contrast to the pred...

Sensitivity of Boron Nitride Nanotubes toward Biomolecules of Different Polarities Saikat Mukhopadhyay, Ralph H. Scheicher, Ravindra Pandey,* and Shashi P. Karna* Department of Physics, Michigan Technological University, Houghton, Michigan 49931, United States Department of Physics and Astronomy, Uppsala University, SE-751 20 Uppsala, Sweden U.S. Army Research Laboratory, Weapons and Materials ...