A bi-stable switching energy harvester made from a buckled steel structure mounted with uniaxially poled piezoelectric polyvinylidene fluoride and 3D printed polylactic acid components is constructed and tested. A data collection system and frequency sweeping program is built to drive the device using a custom compression rig fitted with an accelerometer. The energy harvester is tested with the...

Repetitive transcranial magnetic stimulation (rTMS) is a form of non-invasive brain frequently used to induce neuroplasticity in the brain. Even at low intensities, rTMS has been shown modulate aspects neuronal plasticity such as motor learning and structural reorganisation neural tissue. However, impact intensity on glial cells astrocytes remains largely unknown. This study investigated change...

An approach to rapidly produce high quality polymer surface topographies from numerically generated surfaces is presented. The uses an advanced generation tool flexibly design with user defined topography characteristics over a large range of roughness. Roughness instances RMS roughness 25, 50, and 100 μm are studied. 3D printing used create master casting injection moulding employed enable rap...

In this study, a novel and very simple finite element procedure is presented for free vibration and buckling analysis of slim beam-like structures damaged by edge cracks. A cracked region of a beam is modeled using a very short element with reduced second moment of area (I). For computing reduced I in a cracked region, the elementary theory of bending of beams and local flexibility approach are...

Traditional spline cutoffs of the long-ranged Coulomb interaction gives large errors in the forces which lead to seriously distorted structures. These errors can be drastically reduced (by a factor of 7) by optimally adjusting the cutoffs parameters. Applying to a 453-atom dendrimer, the visibly distorted structure is improved substantially (the rms coordinate deviation is reduced from 1.15 to0...

A three-dimensional, analytic potential energy surface for CO(2)-He that explicitly incorporates its dependence on the Q(3) asymmetric-stretch normal-mode coordinate of the CO(2) monomer has been obtained by least-squares fitting new ab initio interaction energies to a new three-dimensional Morse/Long-Range (3D-MLR) potential function form. This fit to 2832 points has a root-mean-square (RMS) d...

The genetic mechanisms that control proliferation of childhood musculoskeletal malignancies, notably Ewing's tumor (ET) and rhabdomyosarcoma (RMS), remain largely unknown. Most human cancers appear to overexpress at least one of the G1 cyclins (cyclins D1, D2, D3, E1, and E2) to bypass normal regulation of cell cycle G1 progression. We compared the gene expression profiles of 7 ET and 13 RMS pr...

Introduction: Breast conserving surgery followed by adjuvant radiotherapy (RT) of the whole breast is accepted as the treatment of choice in early stage breast cancer. Due to breast irregularities, it is difficult to access homogenous dose distribution with conventional techniques. Currently, it is possible to use varied breast irradiation techniques, such as field- in-field (F...