On the restrictions of Pair-Copula Bayesian Networks for integration-free computations

The pair-copula Bayesian network (PCBN) is a Bayesian network (BN) where the conditional probability functions are modeled using pair-copula constructions. By assigning bivariate conditional copulas to the arcs of the BN, one finds a proper joint density which can flexibly model all kinds of dependence structures. It is a known problem that the...

Onsite Blade Exchange on a Tension-Leg Platform Floating Wind Turbine using a Self-Climbing Crane

Floating offshore wind turbines offer a means to access wind resources in waters that are too deep for bottom-fixed offshore wind turbines. To operate a floating wind farm, it must be possible to perform maintenance on the turbines. A critical maintenance aspect is the exchange of a major component such as a blade. It involves a lift of a large...

Introduction to structure learning for gaussian and pair copula bayesian networks

Due to technological breakthrough in recent decades and the rapid increase in the availability of multidimensional data, data science has become one of the most important areas of research. Within this field, modeling dependence of random variables is gaining great interest. To cope with this task, the use of graphical models is often advocated....

Effect of dislocation core fields on discrete dislocation plasticity

Discrete dislocation plasticity is a modeling technique that treats plasticity as the collective motion of dislocations. The dislocations are described through their elastic Volterra fields, outside of a cylindrical core region, with a few Burgers vectors of diameter. The contribution of the core fields to the dislocation dynamics is...

Providing Foot Clearance during Stair Climbing with Tendon-Driven Systems: An Experimental Approach

Tendon-driven soft exosuits have gained much attention in recent years due to their ability to support people with mobility problems during daily life activities. A task that is particularly assisted by such robotic systems, due to its challenging nature, is stair climbing. However, assisting foot clearance during the swing phase of stair...

The influence of the angle of attack on passenger comfort

The angle of attack (AOA) of an airplane changes the direction of the gravitational force on passengers and thereby might influence passengers’ flying experience. However, the contribution of the AOA regarding comfort/discomfort is not fully explored. In this paper, we aim to fill this knowledge gap by identifying the relationships between the...

Improving the Meta-Grip: Redesigning for unsupervised use

The Meta-Grip is a tool for climbers to measure hand and finger strength. A climber uses the Meta-Grip by hanging on either a sloper or crimp. The Meta-Grip measures the force through a load cell and transfers the data to a computer where the data can be viewed and analyzed. The current Meta-Grip is built for research. Because of this, the...

The line between existing and new: The adoption of material reuse as a design strategy for the transormation of a rear side of the urban block to a new pedestrian front

The main research in question regards what is Bricolage in architecture. This topic is strikingly valuable to contemporary demand, given the fact that there is a considerable amount of buildings and building elements that do not carry a value that is strong enough to be considered historical or cultural. In fact, often the meaning of Bricolage...

Estimation of Flight State with a Collision Alert Radar Based on FMCW Reflections of the Landscape for General Aviation

Although the main goal of a newly developed Collision Alert Radar is to observe airborne targets, it was found that reflections of the ground are received by the radar. The radar is carried on board of the aircraft, and the ground reflections may be used to detect flight information with respect to the terrain, something which is not possible...

Potential Fuel Benefits of Optimized Continuous Climb Operations at Schiphol

Continuous Climb Operations aim at improving the efficiency of a flight's climb phase by reducing the number of level-offs. The associated fuel-benefits help airlines and airports to comply with future emission demands, rising fuel prices and modernizing airspace requirements. Previously, most studies in this field only considered the effect of...

Towards an assistive luggage for reducing human effort while travelling

People love travelling and most of them travel for fun and leisure. But carrying a suitcase through stairs is one of the biggest difficulties one can face while travelling. This project is in the direction of an assistive luggage technology that helps people reduce human effort to carry their suitcase while travelling. Stairo is a concept of a...

Improving training for climbers by enhancing explorative climbing in indoor climbing gyms

Climbing indoors is growing in popularity and is even considered to be included in the Olympic games of 2020 in Japan. Despite the fact that numerous new climbing gyms are being built, there has been little innovation in the gyms themselves. For decades, climbing gyms have wooden walls with plastic holds screwed onto them, and the question...

CatWall

In the pet product market a gap has been noticed in the Dutch field of domestic cat products. Variation in cat perching solutions (commonly referred to as cat trees or scratch posts) has been limited. Almost all products look the same: plush levels connected with sisal posts. To seize this opportunity a new product with an original appearance,...

Dislocation climb in two-dimensional discrete dislocation dynamics

In this paper, dislocation climb is incorporated in a two-dimensional discrete dislocation dynamics model. Calculations are carried out for polycrystalline thin films, passivated on one or both surfaces. Climb allows dislocations to escape from dislocation pile-ups and reduces the strain-hardening rate, especially for fully passivated films....

Verification of obstacle accountability areas using a simple mathematical model: part I: description of general model and application for a specific case

A probabilistic model is described for the lateral displacement of an aircraft after the occurrence of an engine failure during take-off. With the model, a lateral boundary is calculated, for any point of time after the engine failure, such that the probability of being within the (two sided) lateral boundary meets a specified value. Various...