The feasibility of different waste materials as substitutes to the main components of concrete is attracting attention nowadays. This study mainly focuses on determining the effects of combining two waste materials i.e. pig-hair fiber and crushed green mussel shells to the properties of concrete. The pig-hair fibers (PHF) are used as fiber reinforcement to concrete and the crushed green mussel ...

Image reconstruction in optical tomography is a nonlinear and generally ill- posed inverse problem. Noise in the measured surface data can give rise to substantial artifacts in the recovered volume images of optical coefficients. Apart from random shot noise caused by the limited number of photons detected at the measurement site, another class of systematic noise is associated with losses spec...

Industrial case studies of successful implementations of combined mechanical and closed-loop control design provide students with meaningful examples of classroom theory. Such a case study on the development of a capstan drive with feedback control for use in optical fiber production is presented in this paper. Optical fiber is manufactured by the draw process, heating and pulling high purity g...

Mechanical oscillations are important for many cellular processes, e.g., the beating of cilia and flagella or the sensation of sound by hair cells. These dynamic states originate from spontaneous oscillations of molecular motors. A particularly clear example of such oscillations has been observed in muscle fibers under non-physiological conditions. In that case, motor oscillations lead to contr...

Cholinergic efferent fibers modify hair cell responses to mechanical stimulation. It is hypothesized that calcium entering the hair cell through a nicotinic receptor activates a small-conductance (SK), calcium-activated potassium channel to hyperpolarize the hair cell. The calcium signal may be amplified by calcium-induced calcium release from the synaptic cisternae. Pharmacological tests of th...