We report on the i-dropouts detected in two exceptionally deep ACS fields (B435, V606, i775, and z850 with 10σ limits of 28.8, 29.0, 28.5, and 27.8, respectively) taken in parallel with the UDF NICMOS observations. Using an i− z > 1.4 cut, we find 30 i-dropouts over 21 arcmin down to z850,AB = 28.1, or 1.4 i-dropouts arcmin, with significant field-to-field variation (as expected from cosmic var...

in this study, a robust controller is designed for fuzzy network control systems (ncss) using the static output feedback. delay and data packet dropout affect on the stability of network control systems, and therefore, the asymptotic stability condition is established considering delay and data packet dropout. delay is time-varying while the lower and upper bounds for delay is defined, and the ...

Distributed linear algebraic equation over networks, where nodes hold a part of problem data and cooperatively solve the via node-to-node communications, is basic distributed computation task receiving an increasing research attention. Communications network have stochastic nature, with both temporal spatial dependence due to link failures, packet dropouts, or node recreation, etc. In this arti...

In this project, we model MOOC dropouts using user activity data. We have several rounds of feature engineering and generate features like activity counts, percentage of visited course objects, and session counts to model this problem. We apply logistic regression, support vector machine, gradient boosting decision trees, AdaBoost, and random forest to this classification problem. Our best mode...

OBJECTIVE To examine the relations between educational attainment and health (cigarette smoking and perceived health) in Hispanic adolescents. METHOD Participants included 3,360 Mexican American and non-Hispanic white adolescents ranging in age from 12 to 21 years. The sample included school dropouts, academically at-risk students, and control students. RESULTS School dropouts were 6.46 tim...

In networked control systems (NCS), it is considered essential to design a robust controller such that the networked-system is stable against data dropouts during the network transfer. It has been shown that there is a critical data dropout rate over which the networkedsystem could be unstable; hence the desired task cannot be achieved. This paper shows that a desired task or trajectories can b...

The dynamics of power distribution between longitudinal modes of a multimode semiconductor laser subjected to external optical feedback is experimentally analyzed in the low-frequency fluctuation regime. Power dropouts in the total light intensity are invariably accompanied by sudden activations of several longitudinal modes. These activations are seen not to be simultaneous to the dropouts, bu...

In this study, I used a life-table approach to estimate how much hypothetical reductions in pregnancy-related dropouts would help close the gender gap in educational attainment. Using the schooling histories of 6,686 pupils, I partitioned Cameroon's gender gap in education into "pregnancy-related" and "non-pregnancy-related" components and simulated the impact of reductions in pregnancy-related...

Program graduation, even after controlling for length of stay, may predict for improved outcomes in some substance abuse treatment settings. We investigated the role of program graduation by comparing social outcomes and inpatient utilization the years before and after treatment among graduates and dropouts of a Veterans Administration substance abuse intensive outpatient program. At enrollment...

In this paper, a novel observer based networked PI controller has been designed by considering bounded disturbance and measurement noise under specified probability of random packet dropouts in control systems (NCSs). Lyapunov stability condition the NCS with an derived using asynchronous dynamical system (ADS) approach as linear matrix inequality (LMI) nonconvex constraints to improve its qual...