Zobrazeno 1 - 10
of 54
pro vyhledávání: '"D. A. Woodford"'
Publikováno v:
Journal of fish biology. 92(4)
Introduced predatory fishes have had consistently severe consequences for native fishes in stream environments around the world, although the drivers of these effects are often unclear. In the Swartkops River headwaters in South Africa, native Easter
Publikováno v:
Geotechnical Safety and Reliability.
ABSTRACT This paper describes an assessment of the bias, error and reliability associated with capacities and performances of axially and laterally loaded piles, designed according to API Recommended Guidelines [1,2]. We first identify the major sour
Managing conflicts arising from fisheries enhancements based on non-native fishes in southern Africa
Publikováno v:
Journal of fish biology. 85(6)
Southern Africa has a long history of non-native fish introductions for the enhancement of recreational and commercial fisheries, due to a perceived lack of suitable native species. This has resulted in some important inland fisheries being based on
Publikováno v:
The International Journal of Electrical Engineering & Education. 34:291-307
The steady-state chaotic behaviour of power systems containing dc switching elements is displayed in multiple run diagrams. Poincare sampling bifurcation diagrams, maximum and minimum peak voltage diagrams and diagrams showing all peaks in a waveform
Autor:
D. A. Woodford, D. Stiles
Publikováno v:
Journal of Materials Engineering and Performance. 6:521-533
The application of a new approach, design for performance, for high-temperature alloy development, design analysis, and remaining life assessment, based on short-time high-precision testing, is described in this paper. The material tested was a direc
Publikováno v:
The International Journal of Electrical Engineering & Education. 34:255-273
Operational voltage levels can force a.c. power systems into non-linear behaviour. The system global characteristics are presented in bifurcation diagrams, generated using an electromagnetic–transients program. They reveal the onset of ferroresonan
Publikováno v:
IEEE Transactions on Power Delivery. 11:1961-1969
Core saturation instability has occurred on several HVDC schemes resulting from interactions between second harmonic and DC quantities (voltages and currents) on the AC side of the converter and fundamental frequency quantities on the DC side of the
Autor:
G. G. Grzywinski, D. A. Woodford
Publikováno v:
Polymer Engineering and Science. 35:1931-1937
One of the major factors limiting the use of thermoplastics in engineering applications is the inadequacy of existing design data. Much of the data do not span appropriate ranges of stress, strain, time, or temperature. This study addresses the need
Autor:
D. A. Woodford, J. P. Beckman
Publikováno v:
Metallurgical Transactions A. 21:3049-3061
Nickel and nickel-base alloys are extremely sensitive to embrittlement and enhanced crack propagation due to sulfur, which may contaminate during melting, processing, or service. This paper reports the results of a systematic study of the effect of s
Publikováno v:
IEEE Transactions on Power Delivery. 5:2039-2046
The effectiveness of providing positive damping of harmonic oscillations by either modifying the AC-system filter characteristics or adding to the rectifier control circuitry are examined. Two alternative measures of controlling harmonic instability