in the present research, implementations of different computational geometry technologies in isogeometric analysis framework for computational fracture mechanics are investigated. nurbs and t-splines are two different computational geometry technologies which are studied in this work. among features of b-spline basis functions the possibility of enhancing a b-spline basis with discontinuities b...

Due to the high price of virgin vegetable oils and the drawbacks of the homogeneous catalytic transesterification, in this work an economically profitable alternative process was proposed for biodiesel synthesis in which transesterification of the low-cost waste cooking oil (WCO) with methanol in a heterogeneous system was done. Alumina impregnated with sodium hydroxide was utilized as a solid ...

×ØÖÖ BLOCKINØØ With the recent achievement of one teraflop/s (½¼ ½¾ flop/s) on the ASCI Red system at Sandia National Laboratory in the U.S., many have asked what lies ahead for high-end scientific computing. The next major milestone is one petaflop/s (½¼ ½½ flop/s). Systems capable of this level of performance may be available by 2010, assuming key technologies continue to advance at currently...

In this note, we show that the impedance control strategy proposed in the paper is not feasible from practical implementation point of view. Next, a robust impedance controller is proposed for electrically driven robots using Fourier series (FS). The fact that robots' actuators have limited voltage is also considered in controller design procedure. In comparison with other impedance controllers...

background: major thalassemia is an autosomal recessive disease with complications, mortality and serious pathology. today, the life expectancy of patients with major thalassemia has increased along with therapeutic advances. therefore, they need lifelong care, and caring for them would incur many costs. being aware of the patients’ costs can be effective for controlling and managing the costs ...