Handwriting is one of the most natural ways for a human to record knowledge. In recent years this type of human-computer interaction has received increasing attention due to the rapid evolution of digital ink hardware. This thesis contributes to the art of efficient recognition of handwriting and compact storage of digital ink. In the first part of the thesis, we focus on the development of alg...

Recent advancements in 3D bioprinting have led to the fabrication of more complex, more precise, and larger printed tissue constructs. As the field continues to advance, it is critical to develop quantitative benchmarks to compare different bio-inks for key cell-biomaterial interactions, including (1) cell sedimentation within the ink cartridge, (2) cell viability during extrusion, and (3) cell...

316L and Cu‐based inks are developed to 3D‐printed tetrachiral auxetic structures. The main objectives of the work study effects powders composition powder:binder volume ratio on rheological properties printability inks. Following these results, customized Gcode is using FullControl Designer open‐source software 3D print intricate results reported in this show how powder (316L versus Cu) has le...

Three–dimensional, microperiodic scaffolds of regenerated silk fibroin have been fabricated for tissue engineering by direct ink writing. The ink, which consisted of silk fibroin solution from the Bombyx mori silkworm, was deposited in a layer-by-layer fashion through a fine nozzle to produce a 3D array of silk fibers of diameter 5 mm. The extruded fibers crystallized when deposited into a meth...

Microfluidic paper-based analytical devices (μPADs) have emerged as viable multiplexable platforms with the potential to transcend existing analytical techniques in resource-limited settings. μPADs are fabricated by patterning hydrophobic materials on hydrophilic paper. Reproducibility in fabrication is essential in a myriad of applications and particularly, in the development of point-of-care ...

The Yule-Nielsen modified Spectral Neugebauer reflection prediction model enhanced with an ink spreading model provides high accuracy when predicting reflectance spectra from ink surface coverages. In the present contribution, we try to inverse the model, i.e. to deduce the surface coverages of a printed color halftone patch from its measured reflectance spectrum. This process yields good resul...

Recently piezo-based ink jet printers have proven to be reliable, productive manufacturing tools particularly where expensive materials are involved. As bioengineers, we are capitalizing on the ability of piezoelectric-based drop-ondemand ink jets printers to precisely deposit a wide variety of biologically active materials to create custom arrayed libraries and patterns. These applications and...