Abstract Discrete hazard models are widely applied for the analysis of time-to-event outcomes that intrinsically discrete or grouped versions continuous event times. Commonly, one assumes effect explanatory variables on can be described by a linear predictor function. This, however, may not appropriate when non-linear effects interactions between occur in data. To address this issue, we propose...

Economic and environmental logging is important for sustainable wood production in the Caspian forests, north of Iran. Predetermination of the skid trail network and directional felling is a usual recommended method to reduce logging impact. The aim of this study was evaluation of directional felling and finding factors effective on felling error. Totally 135 trees were selected randomly for di...

The proliferation of data collection technologies often results in large sets with many observations and variables. In practice, highly relevant engineered features are groups predictors that share a common regression coefficient (i.e., the group affect response only via their collective sum), where unknown advance must be discovered from data. We propose an algorithm called tree (CTR) to disco...

Depression is a mood disorder that involves the continuing feeling of sadness and loss interest. The crucial life events for an individual, such as losing job may lead to depression. However, feelings grief are clinically diagnosed part depression only if symptoms persist at least two weeks. Eventually, can last several weeks, months, or years. Some overlap with other somatic illnesses cause di...