Best stiffness for striation small change in substrate stiffness can deter striated muscle differentiation, as shown on page 877 by Engler et al. As stiffness changes of this magnitude are not uncommon in diseased tissues, injections of stem cells may be useless unless the target environment is also treated. Muscular dystrophy patients suffer from stiffened muscle tissue. Although muscle precur...

A tool mark imaging system database (named TRAX) has been developed. The database is filled with video-images and alphanumeric data about the tool marks (width, kind of tool mark, etc.). The angle of the tool with the surface, the material of the surface, and the way the tool is moved on the surface, influence the shape of the striation mark. A new algorithm, referred to as the adaptive zoom-al...

Samples of 4130 steel were cut by a CO2 laser and the effects of power and feed rate on kerf width, surface roughness, striation frequency and the size of heat affected zone (HAZ) were studied. It was observed that power had a major effect on kerf width and size of HAZ, while feed rate affects were secondary. In the other hand, surface roughness and striation frequency were affected most by fee...

The present study is focused on the characterization of fatigue damage features in carbon/epoxy laminates under mode-II loading conditions. To this aim, a sinusoidal cyclic load was applied to End-Notched Flexural (ENF) specimens and behavior investigated. Scanning Electron Microscope (SEM) used identify fracture surface, i.e. fiber imprints, cusps, roller striations. It found that features, su...

We found that a solution of actin filaments can form a periodic texture in the process of drying on a flat glass surface in the air; the periodic texture was composed of smooth meandering bundles of actin filaments. We also found that a branched salt crystal grows in the space between the meandering bundles of actin filaments. The distance between the adjacent striae (striation period) in the r...

The contractile characteristics, fatiguability, and ultrastructure were examined in individual twitch skeletal muscle fibres dissected from the iliofibularis muscle of frog Rana temporaria in order to define if an explicit correspondence exists between physiological and morphological features in different types of muscle fibres. Three groups of twitch fibres were distinguished in the study acco...

A new syndrome of autosomal recessive spastic ataxia has been isolated in the Charlevoix-Saguenay region of Quebec. This syndrome is remarkably homogeneous and includes: spasticity, dysarthria, distal muscle wasting, foot deformities, truncal ataxia, absence of sensory evoked potentials in the lower limbs, retinal striation reminiscent of early Leber's atrophy and the frequent presence (57%) of...

The waveguide invariant summarizes the pattern of constructive and destructive interference between acoustic modes propagating in the ocean waveguide. For many sonar signal-processing schemes, it is essential to know the correct numerical value for the waveguide invariant. While conventional beamforming can estimate the ratio between the waveguide invariant and the range to the source, it canno...

With the increased requirement of miniaturization structures on hard and brittle substrates, micro abrasive air jet turning technology has become a promising machining for manufacturing structures. This paper presents an investigation multi-pass radial-mode fused silica. The effect parameters depth cut materials removal rate was analyzed. waviness striation formation mechanisms were studied. It...