A systematic approach to deal with highly imbalanced data when predicting flight cancellations and delays

As on-time performance is one of the main contributors to success in the world of commercial aviation, predictions on flight delays and cancellations can significantly improve operational efficiency and thus quality of service. Since flight delays and cancellations are occasional and infrequent events, operational on-time performance data is...

Predicting the survival of coral reefs: A biophysical modelling approach

KEY POINTS (I) A biophysical model framework (BMF) for corals is developed in which four environmental factors are included: (1) light; (2) hydrodynamics; (3) temperature; and (4) acidity. (II) The full feedback loop between corals and their environment forms the core of this model framework, where the morphological...

PoDeA, Port development Argentina

This report contains the conceptual lay-out for two possible expansions of the port of Bahía Blanca. To determine the best conceptual lay-outs, emphasis is drawn to understand the physical system to determine the effect of the expansion of the port on the natural system. The port of Bahía Blanca is situated at the end of a ria, or tidal basin....

Adaptively Layered Statistical Volumetric Obscurance

We accelerate volumetric obscurance, a variant of ambient occlusion, and solve undersampling artifacts, such as banding, noise or blurring, that screen-space techniques traditionally suffer from. We make use of an efficient statistical model to evaluate the occlusion factor in screen-space using a single sample. Overestimations and halos are...

Realistic Rendering Of Virtual Worlds

The problem posed to the authors concerns SketchaWorld, a terrain modeling framework that allows users to easily construct virtual worlds by means of sketching. Until now, the developers of SketchaWorld have focused on procedural content generation and have left its visual presentation largely untouched. The authors have been tasked to develop a...

Morphological reaction of rivers due to sediment mining

In many rivers sediment is mined at same distance from the river mouth. Examples are the Brantas river at Java, Indonesia and the Mekong river, Thailand. This study contains the research of sediment mining in general. The sediment mining has its consequences on the river morphology: The bedlevel and the waterlevel decrease downstream as weIl as...

Ontgrondingsberekeningen haven van IJmuiden

In dit rapport is een onderzoek beschreven, dat is verricht op het WL-De Voorst. Het onderzoek omvat het testen van een module voor de berekening van ontgrondingskuilen in een kustgebied. Deze kuilen ontstaan als gevolg van de bouw van een konstruktie. Daartoe zijn in dit rapport gegevens verzameld en omgerekend in randvoorwaarden en invoer voor...