Abstract Unsteady aerodynamic phenomena appearing close to the stall boundary in axial fans and compressors have been subject of extensive investigations. A particular phenomenon known as “rotating instabilities” typically occurs tip region at highly loaded conditions is often linked blade vibrations. During rig engine testing, it usually identified by characteristic shape its pressure spectra....

Twelve Wisconsin dairy herds were selected to include six sand freestall herds and six mattress freestall herds. For the duration of one 24 hour period, the mature cow high group pen on each farm was video filmed. For each herd, the film was analyzed every hour in order to determine the number of cows in the pen that were lying down, standing in the stall with all four feet and perching in the ...

The paper presents a multi-body analysis of the 1/5 scale wind tunnel model of the V{22 tiltrotor, the Wing and Rotor Aeroelastic Testing System (WRATS), currently tested at NASA Langley Research Center. An original multibody formulation has been developed at the Dipartimento di Ingegneria Aerospaziale of the Politecnico di Milano, Italy. It is based on the direct writing of the equilibrium equ...

The demand for global video has been burgeoning across industries. With the expansion and improvement of videostreaming services, cloud-based video is evolving into a necessary feature of any successful business for reaching internal and external audiences. This paper considers video streaming over distributed systems where the video segments are encoded using an erasure code for better reliabi...

3 The Rotating Calipers Algorithm 3 3.1 Computing the Initial Rectangle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 3.2 Updating the Rectangle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 3.2.1 Distinct Supporting Vertices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 3.2.2 Duplicate Supporting Vertices . . . . . ....

objective and aims intrauterine devices (iuds) are placed in the uterine cavity with the objective of providing long-term contraception, mainly by preventing fertilization. in this research has been tried to show that method of iud insertion is effective to decrease complications’ incidence . rotating withdrawal technique is presenting, has been using for this purpose. design and setting this h...

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A comparative study of two combined blowing/suction flow control methods was conducted on the pitching airfoil using unsteady Reynolds-averaged Navier–Stokes (URANS) method. One used leading-edge blowing and trailing-edge suction, which is referred to as a co-flow jet (CFJ), conformal slot CFJ (C-CFJ) adopted. Another suction with blowing, called reversed (R-CFJ). The S809 baseline its stall ch...