We analyze the stability of a constrained piecewise continuous hybrid system that is controlled by a receding horizon controller across an unreliable communication channel. We assume the presence of a buffer at the actuator to store the control input sequence received from the controller to compensate for any possible packet dropouts in future transmissions. Input-to-state stability is consider...

We investigate the impact of presence university dropouts on academic success first-time students in universities applied sciences. Our identification strategy relies quasi-random variation proportion dropouts. The estimated average zero effect students’ masks treatment heterogeneity and non-linearities. First, we find negative effects their new peers from who had re-enrolled same subject and, ...

We study the Spitzer Infrared Array Camera (IRAC) mid-infrared (rest-frame optical) fluxes of 14 newly WFC3/ IR-detected z ∼ 7 z850-dropout galaxies and 5z ∼ 8Y105-dropout galaxies. The WFC3/IR depth and spatial resolution allow accurate removal of contaminating foreground light, enabling reliable flux measurements at 3.6μm and 4.5μm. None of the galaxies are detected to [3.6] ≈ 26.9 (AB, 2σ ),...

Motivated by recent observational studies of the environment of z ∼ 6 QSOs, we have used the Millennium Run (MR) simulations to construct a very large (∼ 4◦ × 4) mock redshift survey of star-forming galaxies at z ∼ 6. We use this simulated survey to study the relation between density enhancements in the distribution of i775-dropouts and Lyα emitters, and their relation to the most massive halos...

In " Reframing School Dropout as a Public Health Issue " (1), Freudenberg and Ruglis make a succinct, yet compelling , case. Arguably, reducing racial, ethnic, and socioeconomic disparities in educational achievement (including disparities related to graduating from high school by age 18 years) is key to reducing not only disparities in adult incarceration and socioeconomic position but also to...

The widely used distinction of Little and Rubin (1) about types of randomness for missing data presents difficulties in its application to dropouts in longitudinal repeated measurement studies. In its place, a new typology of randomness for dropouts is proposed that relies on using a survival model for the dropout process. In terms of a stochastic process, dropping out is a change of state. The...