Zinc Aluminum Oxide (ZAO) thin films were deposited on glass substrates by DC reactive magnetron sputtering technique with high purity Zn and Al targets. After the deposition, the films were annealed in vacuum from 200 to 500 C. Surface roughness measurement of ZAO thin films in the nanometer scale can be accurately determined using the atomic force microscopy. Surface roughness and grain size ...

The controlled destruction of the PIN diode detectors, SIEMENS SFH 870/F170 and 871/F171, by 35 MeV beam 12C 24 14N, respectively, was characterized using nuclear spectroscopy, surface profile measurements, positron annihilation spectroscopy technique. fluence in range 1012–1014 ions/cm2. It has been shown that 1012 ions/cm2 did not allow it to destroy detector. For this purpose, one needs at l...

BACKGROUND Although many studies have compared the properties of ultrasonic scaling instruments, it remains controversial as to which is most suitable for implant scaling. This study evaluated the safety and efficiency of novel metallic ultrasonic scaler tips made by the powder injection molding (PIM) technique on titanium surfaces. METHODS Mechanical instrumentation was carried out using fou...

The surface roughness effects on the dynamic squeezing behavior of a finite length partial journal bearing under a time dependent oscillating load is studied. Use Christensen’s stochastic models to develop the stochastic Reynolds’ equation of the longitudinal, transverse and uniform isotropic roughness. According to the results obtained, the roughness pattern, the height of roughness and have s...

The authors find the greatest value λ and the least value μ, such that the double inequality C(λa + (1-λb), λb+(1-λ)a) < αA(a, b) + (1-α)T(a,b) < C(μa + (1 - μ)b, μb + (1 - μ)a) holds for all α ∈ (0, 1) and a, b > 0 with a ≠ b, where C(a, b) = 2(a² + ab + b²)/3(a + b), A(a, b) = (a + b)/2, and T(a, b) = (a + b)/2, and T(a, b) = (2/π) ∫₀(π/2) √a²cos²θ + b²sin²θdθ denote, respectively, the centro...

for better understanding of tehran ground water, samples were taken randomly from 340 out of 655 deep & semi deep wells in 1993, which dug by tehran water supply and sewage engineering company. 260 water specimens were examined chemically and physically and compared with the 1993 world health organization (who) and food and agriculture organization (fao) criteria and analyzed statistically. log...

In this paper, the computation of numerical integration using arithmetic mean (AMDCNC), geometric mean (GMDCNC) and harmonic mean (HMDCNC) derivativebased closed Newton cotes quadrature rules are compared with the existing closed Newton cotes quadrature rule (CNC). The comparison shows that, arithmetic mean-based rule gives better solution than the other two rules. This set of quadrature rules ...

The drawing process behavior was investigated with focus on fiber stretching speed (spinning acceleration) to improve luster quality of fibers. Wet spinning method has a limitation low at high speed. It determined that (1) could be evaluated by arithmetic average ( RΔa ) fibers, which indicated the roughness, and (2) roughness related acceleration through analysis . Spinning measured chasing ma...

Abstract In modern intelligent manufacturing, when using industrial robots to complete precision machining of lithium battery heat dissipation housing materials such as assembly, grinding, polishing, and deburring, it is not only necessary track the position robot’s end effector, but also consider contact force generated actuator contacts working environment. This project takes research on cont...