Fatigue damage onset involves a transformation of mechanical energy. This is in part spent into work plastic deformation and fracture transformed heat. Therefore, different thermomechanical heat sources are activated during fatigue loading cycle, resulting temperature modulation that can be characterized by its frequency content. Several studies have monitored the on samples undergoing high-cyc...

At this time, there is a pressing need to develop new technologies capable of detecting, identifying, and potentially neutralizing energetic materials, preferably from a stand-off distance. To address this need, an improved understanding of the mechanics of energetic materials, prior to detonation or defl agration, must be developed. In light of this, the present effort seeks to characterize th...

The harmonic index H(G) , of a graph G is defined as the sum of weights 2/(deg(u)+deg(v)) of all edges in E(G), where deg (u) denotes the degree of a vertex u in V(G). In this paper we define the harmonic polynomial of G. We present explicit formula for the values of harmonic polynomial for several families of specific graphs and we find the lower and upper bound for harmonic index in Caterpill...

The complex network structure of elastin and collagen extracellular matrix (ECM) forms the primary load bearing components in the arterial wall. The structural and mechanobiological interactions between elastin and collagen are important for properly functioning arteries. Here, we examined the elastin and collagen organization, realignment, and recruitment by coupling mechanical loading and mul...

For articular cartilage with the approximate material parameters HA = 1MPa, k = 1.0 · 10mNs and the sample radius relevant for current tissue engineering studies r0 = 2mm we find a characteristic time constant of τg ≈ 67min. For agarose with the same geometrical dimensions and the material parameters HA = 1.5 kPa, k = 6.61 · 10 mNs [2] we find τg ≈ 67min as well. These rough estimates show a co...

Restoration of single tooth loss with implant supported prosthesis is now considered a highly predictable treatment. However, the maxillary anterior region still presents a challenge for both the prosthodontist and the periodontist because of the inherent difficulties encountered in the provisionalization and harmonic incorporation of the definitive prosthesis into patient's dentogingival compl...

This article discusses the-state-of-the-art of the vaneloaded gyrotron traveling wave tube (gyro-TWT) amplifier, which is device of increasing importance for high resolution radar and high information density communication systems because of its high-power and broad bandwidth capabilities. Vane loading is identified as a means to achieve a low-beam energy, high-harmonic, low-magnetic field, mod...

A multistacked varactor is presented for ultra-linear tunable radio frequency applications. The varactor elements are applied in anti-series configuration and are characterized by an “exponential” relationship. Third-order intermodulation ( ) is cancelled through proper harmonic loading of the terminals of the anti-series configuration. Multiple stacking is used to further increase the power ha...