Although ultraprecision diamond turned optics can have surface roughness down to tens of nanometers or even lower, they may still contain defects due to machining process variations. Diamond turned surfaces have been carefully studied before [3-12]. The previous research however was mainly focused on the causes of the surface texture and one of the main goals of these studies was to improve the...

Abstract—Geometrical shape of bamboo usually assumed as tapered hollow pipe. This study proved that the dimensional changes along the bamboo stem significantly affected to its Modulus of Rupture (SR) value which measured from third point loading bending test. Therefore if the bending test applied using third point loading configuration, the SR value should be adjusted by strength ratio of taper...

The three-point shot (3S) is a fundamental basketball skill used frequently during a game, and is often a main determinant of the final result. The aim of the study was to investigate the effect of different metabolic conditions, in terms of heart rates, on 3S accuracy (3S%) in 24 male (Under 17) basketball players (age 16.3 ± 0.6 yrs). 3S performance was specifically investigated at different ...

We study the effect of an ac drive on the current-voltage (I-V) characteristics of a tunnel junction between two fractional quantum Hall fluids at filling n an odd integer. Within the chiral Luttinger-liquid model of edge states, the point-contact dynamics is described by a driven damped quantum mechanical pendulum. In a semiclassical limit which ignores electron tunneling, this model exhibits ...

Can formal contracts help resolving the holdup problem? We address this important question by studying the holdup problem in repeated transactions between a seller and a buyer in which the seller can make relation-specific investments in each period. In contrast to previous findings, we demonstrate that writing a simple fixed-price contract based on product delivery is of value even when relati...

BACKGROUND Active muscular trigger points (aMTPs) presenting with radiating pain can interfere in diagnosis and treatment of patients suffering from lumbosacral radiculopathy. OBJECTIVES We aimed to diagnose and evaluate the trigger point therapy on the outcome of pain in patients with lumbosacral radiculopathy. MATERIALS AND METHODS A total of 98 patients were enrolled suffered with chroni...

Waste Low density polyethylenes (LDPE) represent a source of energy and valuablechemicals, were pyrolysed catalytically in a batch reactor under atmospheric pressure. Calciumcarbide was used as a catalyst to explore its effect on pyrolysis product distribution. The effect oftemperature, amount of catalyst and time on the yields of the pyrolysed products wasinvestigated. The effect of catalyst o...