This communication proposes a new approach to create complex hierarchical nano-to-meso-scale architectures based on the use of biological connector molecules to direct the assembly of uniquely shaped multi-component nanostructures fabricated using glancing angle deposition (GLAD). Multiple sets of 50-nm-wide and 150 to 650-nm-tall Si-Cr/Au multi-stack zigzag nanosprings and nanorods are grown b...

Compaction bands are localized, planar zones of compressed material that form perpendicular to the maximum compressive stress. Compaction bands have been observed in porous sandstone formations in the field and in laboratory compression tests on porous sandstone, plaster, glass beads, polycarbonate honeycombs and metal foams. Because the permeability of the compacted material is much reduced, c...

In large wireless sensor networks, low energy consumption is a major challenge. Hence, deployed nodes have to organize themselves as energy efficient as possible to avoid unnecessary sensor and transceiver operations. The energy conserving operations are limited by the task of the network, usually the network has to guarantee complete functionality during its lifetime. The contribution of this ...

I dedicate this thesis to my family for their support and love. iv ACKNOWLEDGEMENTS First, I would like to thank my advisor Dr. Seung-Kyum Choi for his support and guidance to me with his knowledge throughout my graduate studies and school experience. I would also like to thank the reading committee, Prof. David Rosen and Dr. Yan Wang, for their time to read and provide their knowledge and expe...

The Uniform Honeycomb-filled Tube (UHT) is one of the composite structures that has shown huge potential in absorbing energy. In this paper, Honeycomb (UH) filler replaced by an enhanced Modularized (MH). biggest advantage MH it can significantly enhance energy absorption without adding weight compared with its uniform counterpart. Finite element models are created, and then validated theoretic...