We sharply characterize the performance of different penalization schemes for the problem of selecting the relevant variables in the multi-task setting. Previous work focuses on the regression problem where conditions on the design matrix complicate the analysis. A clearer and simpler picture emerges by studying the Normal means model. This model, often used in the field of statistics, is a sim...

In conventional form-based dialogue manager, the task structure of a given task domain is built on E-form or flat slot structure, which some useful structure information of the task domain has been lost. This paper describes a hierarchical task structure model that is domain independent at least for a class of task domains. Based on the task structure model, a rule based dialogue management, wh...

As a precursor to the development of a gamified system to improve learning outcomes, we investigate the perception of important stakeholders, namely learners, on gamification in learning. However, as gamification is a relatively new approach/term, we neither assume that learners are knowledgeable about it nor do we attempt to explain the term in detail to them. Instead, we focus on common eleme...

Modern studies in the field of environment science and engineering show that deterministic models struggle to capture the relationship between the concentration of atmospheric pollutants and their emission sources. The recent advances in statistical modeling based on machine learning approaches have emerged as solution to tackle these issues. It is a fact that, input variable type largely affec...

to present a multiple-instructor, active-learning strategy in the undergraduate medical curriculum. this educational research is a descriptive one. shared teaching sessions, were designed for undergraduate medical students in six organ-system based courses. sessions that involved in-class discussions of integrated clinical cases were designed implemented and moderated by at least 3 faculties (c...

this experimental study examined the effectiveness of using focused and unfocused tasks on iranianintermediate efl learners’ performance in producing noun, adjective, and adverb clauses. in addition,the aim of this study was to explore the effects of form-focused instruction and the feedback studentsreceived from their teacher after doing focused grammar tasks. data consisted of the scores ofth...

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