The fundamental relations governing the geometry of carbon nanotubes are reviewed, and explicit examples are presented. A framework is given for the symmetry properties of carbon nanotubes for both symmorphic and non-symmorphic tubules which have screw-axis symmetry. The implications of symmetry on the vibrational and electronic structure of ID carbon nanotube systems are considered. The corres...

MRI provides a valuable tool for noninvasive evaluation of myocardial wall motion. Recently, multi-phase 2D DENSE MRI was developed to quantify cardiac strain in mice at high spatial and temporal resolution [1, 2]. DENSE methods for 3D displacement encoding have also been investigated [3]. Typically, these methods entail multiple acquisitions that are time consuming. In this project, we aimed t...

Vessel wall magnetic resonance imaging at ultra-high field (7 Tesla) can be used to visualize vascular lesions noninvasively and holds potential for improving stroke-risk assessment in patients with ischemic cerebrovascular disease. We present the first multi-modal comparison of such high-field vessel wall imaging with more conventional (i) 3 Tesla hemodynamic magnetic resonance imaging and (ii...

We describe our work-in-progress on deriving guidelines for porting tablet interfaces onto wall-sized touchscreen displays. As the first case study we have ported the 3D user interface of a virtual city model originally designed for a single-user tablet display. We discuss the challenges encountered and solutions adopted in the process of converting the 3D interface originally designed for a pr...

Immersive virtual environments require large-scale high resolution displays to match the human visual acuity. This drives the need to study scalability issues related to display wall systems. This paper reports our experiences in scaling up the display wall system at Princeton University from 8 to 24 projectors. We discuss scalability techniques for automatic projector calibration, cluster mana...

Based on the continuum mechanics and a multiple-elastic beam model, the nonlinear free vibration of embedded multiwall carbon nanotubes considering intertube radial displacement and the related internal degrees of freedom is investigated. By using the incremental harmonic balanced method, the iterative relationship of nonlinear amplitude and frequency for the single-wall nanotube and double-wal...