4D printing magnetic structures with excellent strength activated a low level of field are always desired but challenging. This work studies the influence simultaneous magnetization on magneto-mechanical performance 4D-printed active polymers. The main aim is to magnetise iron polylactic acid (PLA) material during via fused deposition modelling (FDM) process. During process, samples performed i...

Additive manufacturing (AM) of polyetheretherketone (PEEK) biomaterials using the material-extrusion (MEX) method has been studied for years. Because challenging process, precisely controlling printing parameters is crucial. This study aimed to investigate effects such as orientation and position on mechanical properties. Thus, 34 samples were printed PEEK filament MEX process. Samples divided ...

The present work investigates the transmission of light through stacks of halftone printed transparencies. We propose a spectral transmittance model describing the multiple reflections of light between the transparencies, whose individual reflectance and transmittance have themselves been obtained by a prediction model. The model for single printed transparency involves the multiple reflections...

Research evidence indicates that both the physical and social environments in children’s homes impact their ability to develop language. These factors, however, are rarely considered simultaneously nor is the combined impact of multiple levels of the child’s environment often investigated in a single study. The current study considered the direct influence of access to printed materials in the ...

Spinodal decomposition and phase transitions have emerged as viable methods to generate a variety of bicontinuous materials. Here, we show that when arrested phase separation is coupled to the time scales involved in three-dimensional (3D) printing processes, hydrogels with multiple length scales spanning nanometers to millimeters can be printed with high fidelity. We use an oil-in-water nanoem...

Since additive manufacturing technologies constantly advance, the use of this technology in mold making seems reasonable. Many manufacturers of additive manufacturing machines, however, do not offer any suggestions on how to parameterize the machine to achieve optimal results for mold making. The purpose of this research is to determine the interdependencies of different materials and parameter...

We are developing a hand-printed character recognition system using a multilayered neural net trained through backpropagation. We report on results of training nets with samples of hand-printed digits scanned off of bank checks and hand-printed letters interactively entered into a computer through a stylus digitizer. Given a large training set, and a net with sufficient capacity to achieve high...

A new spectral colour prediction model for a fluorescent ink printed on paper is presented. It is based on our previous work on transparent support4 and on a new mathematical formalism which generalizes the Kubelka-Munk theory. The printed paper is modelized by means of three matrices: an interface correction matrix, a matrix exponential modelizing the layer which contains the fluorescent ink, ...

In this master’s project a number of scanner colour calibration methods are evaluated for the purpose of establishing a calibration method for a desktop scanner. A scanner is used when scanning images of homogenous printed areas that subsequently are analysed for the measurement of colour mottle in prints. The master’s project has involved studies of several calibration techniques including art...

The elastic response of homogeneous isotropic materials is most commonly represented by their Young's modulus (E), but geometric variability associated with additive manufacturing results in that are neither nor isotropic. Here we investigated methods to estimate the effective (Eeff) samples fabricated fused filament fabrication. We conducted finite element analysis (FEA) on printed based mater...