The simulation results for electromagnetic energy harvesters (EMEHs) under broad band stationary Gaussian random excitations indicate the importance of both a high transformation factor and a high mechanical quality factor to achieve favourable mean power, mean square load voltage, and output spectral density. The optimum load is different for random vibrations and for sinusoidal vibration. Red...

Since the discovery of the mechanism of adhesion in geckos, many synthetic dry adhesives have been developed with desirable gecko-like properties such as reusability, directionality, self-cleaning ability, rough surface adhesion and high adhesive stress. However, fully exploiting these adhesives in practical applications at different length scales requires efficient scaling (i.e. with little lo...

come) may have been biased. A 3 days shorter duration of mechanical ventilation ( p = 0.01) and a 4.1 day shorter hospital stay ( p = 0.005) were also observed with EarlyPN. Mortality was similar in both groups, but hypoglycemia was more frequent with LatePN (9.1%) vs. EarlyPN (4.8%, p = 0.001). The authors conclude that withholding PN for 1 week is advantageous in critically ill children. Base...

Robert Bryant From Mechanics, to Algebra, to Geometry: The Notion of Holonomy. Abstract: Familiar mechanical phenomena, such as driving and parking a car, rolling a ball, and even the ability of falling cats to land on their feet (usually) are examples of an underlying mathematical concept that, in the 19th century, came to be known as ”holonomy.” As it became better understood, mathematicians ...

Since the discovery in the late 18th century of electrically induced mechanical response in muscle tissue, coupling between electrical and mechanical phenomena has been shown to be a near-universal feature of biological systems. Here, we employ scanning probe microscopy (SPM) to measure the sub-Angstrom mechanical response of a biological system induced by an electric bias applied to a conducti...

We present a general relativistic framework for studying gravitational effects in quantum mechanical phenomena. We concentrate our attention on the case of ultra-relativistic, spin1/2 particles propagating in Kerr spacetime. The two-component Weyl equation with general relativistic corrections is obtained in the case of a slowly rotating, weak gravitational field. Our approach is also applied t...

By isotopic quail-chicken chimera experiments of the Rauber's sickle or by radioactive labelling and isotopically replacing of the caudal endophyllic sheet in unincubated avian blastoderms, followed by culture, we demonstrated that the displacement of the endophyll by the cranially extending sickle endoblast is not exclusively a mechanical phenomenon, as suggested by earlier studies (Vakaet, 19...

Bone "stress-whitens," becoming visibly white during mechanical loading, immediately prior to failure. Stress-whitening is known to make materials tougher by dissipating mechanical energy. A greater understanding of stress-whitening, both an optical and mechanical phenomenon, may help explain age-related increases in fracture risk that occur without changes in bone mineralization. In this work,...

Abstract High-voltage composite insulators are specially designed to withstand different environmental conditions ensure a reliable and efficient electric power distribution transmission. Especially, outdoor exposed rain, snow or ice, which might significantly affect the performance of insulators. The interaction sessile water droplets fields is investigated under various boundary conditions. B...