Laser surface texturing (LST) is a powerful technique for creating high quality micro-textured patterns with different shapes and sizes on metallic biomaterials. Textured surfaces may improve the interaction between bone implant by increasing contact area thus promoting regeneration. The goal of this study was to explore Nd:YAG laser potential micro-scale pillars pyramid geometry, dimensions in...

OBJECTIVE To clarify the diagnostic significance of nuclear grooves in thyroid fine needle aspirates, to search for other associated nuclear features and to identify possible diagnostic pitfalls. STUDY DESIGN In total, 67 fine needle aspiration cases were retrospectively reviewed for selected nuclear features, including grooves, intranuclear cytoplasmic invaginations, enlargement, pleomorphis...

The superhydrophobic surface is widely used to reduce friction for the flow inside micro-channel and can be used to control/manipulate fluid, cells and even proteins in lab-on-chip. Fabricating micro grooves on hydrophobic surfaces is a common method to obtain such superhydrophobic surface. This study utilized the numerical method to investigate the effect of eccentric micro-grooves on the fric...

Internal combustion engines have been a relatively inexpensive and reliable source of power for applications ranging from domestic use to large scale industrial and transportation applications for most of the twentieth century. DI Diesel engines, having the evident benefit of a higher thermal efficiency than all other engines, have served for both lightduty and heavy-duty vehicles. In DI diesel...

This report addresses phylogenetic variation in a spatial skill that underlies tool use: aligning objects to a feature of a surface. Fragaszy and Cummins-Sebree's [Behavioral and Cognitive Neuroscience Reviews 4:282-306, 2005] model of relational spatial reasoning and Skill Development and Perception-Action theories guided the design of the study. We examined how capuchins and chimpanzees place...

Grooved surfaces are effective to suppress the secondary electron emission, and can be a promising technique to mitigate the electron cloud effect in positron/proton storage rings. Aiming for the application in a dipole-type magnetic field, various shapes of triangular grooved surfaces have been studied at KEK. The grooves tested here have vertex angles of 20−30°, depths of 2.5−5.0 mm, and vert...

This work aimed to investigate the distribution characteristics of low-frequency magnetic flux leakage (LF-MFL) field defect on oil and gas pipelines in electromagnetic detection technique (LFET). Taking four types crack defects (rectangular, semicircular, trapezoidal, V-shaped grooves) with equal lengths, widths different bottom shapes into consideration, specific mathematical model LF-MFL was...

Ideas based on constitutional supercooling suggest that the periodic steady state cellular patterns seen in the directional solidification of systems with small partition coefficient may be unstable if the impurity concentration in the melt just in front of the tips falls into the two phase (miscibility gap) region of the phase diagram. This gives a simple stability criterion relating the posit...