alternatives to shifting cultivation Damasa Magcale-Macandog, I. Wayan
Rusastra, Australian Centre for International ... first is hedgerow intercropping,
based on the research of/Xdiningsih and Mulyadi (1993) in Terbanggi-Lampung, Sumatra.
The velocity field of a representative helicopter fuselage in a free stream is computed. Perturbation velocities due to the fuselage are computed in a plane above the location of the helicopter rotor (rotor removed). The velocity perturbations computed by a source-panel model of the fuselage are compared with experimental measurements taken with a laser velocimeter. Three paneled fuselage models are studied: fuselage shape, fuselage shape with hub shape, and a body of revolution. The velocity perturbations computed for both fuselage shape models agree well with the measured velocity field except in the close vicinity of the rotor hub. In the hub region, without knowing the extent of separation, modeling of the effective source shape is difficult. The effects of the fuselage perturbations are not well-predicted with a simplified ellipsoid fuselage. The velocity perturbations due to the fuselage at the plane of the measurements have magnitudes of less than 8 percent of free-stream velocity. The velocity perturbations computed by the panel method are tabulated for the same locations at which previously reported rotor-inflow velocity measurements were made. Keywords: Helicopter fuselage: Rotor inflow: Source panel: Laser velocimeter. (jhd).
The theory of spline functions is developed to a point which allows us to establish the properties of spline interpolation for the case of multiple nodes. The genesis of Polya frequency functions from spline functions is developed. (Author).
The theory of spline functions is developed to a point which allows us to establish the properties of spline interpolation for the case of multiple nodes.
