Motivated by requirements of freeform architecture, and inspired by the geometry of hexagonal combs in beehives, this paper addresses torsion-free structures aligned with hexagonal meshes. Since repetitive geometry is a very important contribution to the reduction of production costs, we study in detail “honeycomb structures”, which are defined as torsion-free structures where the walls of cell...

Functional testing of SFF parts represents an exciting area of research in solid freeform fabrication. One approach to functional testing is to use similitude techniques to correlate the behavior of an SFF model and a product. Previous research at UT Austin has resulted in development of an empirical similitude technique to correlate the behavior of parts of dissimilar materials and geometry. A...

We provide a theory of random intertemporal choice. Choice is random due to unobserved heterogeneity in discounting from the perspective of a modeler. First, we show that the modeler can identify the distribution of discount rates uniquely from random choice. We then provide axiomatic characterizations of random discounting utility models, including exponential and quasi-hyperbolic discounting ...

Traditionally, diagrams used in software systems modelling have been two dimensional (2D). This is probably because graphical notations, such as those used in object-oriented and structured systems modelling, draw upon the topological graph metaphor, which, at its basic form, receives little benefit from three dimensional (3D) rendering. This paper presents a series of 3D graphical notations de...

Visualizing complex beamline designs, animating installation procedures and virtually walking through planned facilities 3D modelling is a powerful tool with a broad range of applications in accelerator development. The poster gives examples for established and emerging 3D modelling applications at the European XFEL and their benefits: 3D visualization enables inspection and compliance analysis...

The paper gives a detailed report on investigations of dinosaur skeletons being conducted to collect data on dinosaurs’ life history. A large quantity of physiological data can be derived if the properties of living animals are inferred, e.g. body volume (body mass) and body surface area, using the methods of comparative physiology. These values can be determined through the use of some modelli...

Technologies of Rapid Prototyping (RP) represents the rapid production of 3D physical parts using by additive manufacturing technology. The start these techniques became available in the late 1980s and were used to produce 3D models and prototype parts. Today they are used for a much wider range of applications and are even used to manufacture production-quality parts in relatively small number...

Visualisation and the handling of large data sets are key issues in the workflow of many applications in today’s life and engineering sciences. However, from a software and data engineering point of view, these two important services are often located in two separated, i.e. independent and closed software systems. This means that the exchange of data and operations between software systems, i.e...

Object-oriented modelling is considered to be complicated to teach and learn in introductory courses in computer science and software engineering. Animated program visualisation can be significantly used to support teaching objectoriented modelling for beginners. However, there is a lack in instructional methods that support such approach. This paper bridges the gap by introducing a new instruc...