Zobrazeno 1 - 10 of 20 pro vyhledávání: '"J L, van Niekerk"'
1
South African shale gas economics: Analysis of the breakeven shale gas price required to develop the industry
Autor: S. Fakir, J. Petrie, J. L. van Niekerk, S. Clark
Publikováno v: Journal of Energy in Southern Africa, Volume: 32, Issue: 1, Pages: 83-96, Published: FEB 2021
Journal of Energy in Southern Africa, Vol 32, Iss 1 (2021)
Is Karoo shale gas an economically viable option for providing the gas needed for the South African power grid? Dispatchable power generation is essential for the implementation of a renewable based electric grid system. Natural gas-fuelled generatio
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ccb146121ae4e053048bae3e9c03a2d8
http://www.scielo.org.za/scielo.php?script=sci_arttext&pid=S1021-447X2021000100007&lng=en&tlng=en
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2
The use of seat effective amplitude transmissibility (SEAT) values to predict dynamic seat comfort
Autor: J. L. van Niekerk, Jeff Greenberg, W.J Pielemeier
Publikováno v: Journal of Sound and Vibration. 260:867-888
The Seat Effective Amplitude Transmissibility (SEAT) value is the ratio of the vibration experienced on top of the seat and the vibration that one would be exposed to when sitting directly on the vibrating floor. SEAT values have been widely used to
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::012be943215e9d16d27fab7f4e4658d5
https://doi.org/10.1016/s0022-460x(02)00934-3
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3
Akademický článek
Partial ileal bypass reduces the production rate of low density lipoproteins in Watanabe heritable hyperlipidemic rabbits.
Autor: A F Stalenhoef, J L van Niekerk, P N Demacker, A van 't Laar
Publikováno v: Journal of Lipid Research, Vol 25, Iss 12, Pp 1350-1357 (1984)
Partial ileal bypass surgery in homozygous Watanabe heritable hyperlipidemic (WHHL) rabbits resulted in a decrease of low density lipoproteins (LDL)-cholesterol from 14.2 +/- 2.4 to 7.0 +/- 1.2 mmol/l. To investigate the effect of partial ileal bypas
Externí odkaz: https://doaj.org/article/09a62e5211bd476386f9c7efd3d9a6b6
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4
Active Control of a Circular Membrane to Reduce Transient Noise Transmission
Autor: Benson H. Tongue, J. L. van Niekerk
Publikováno v: Journal of Vibration and Acoustics. 117:252-258
An active control approach that reduces transient noise transmission through a membrane in a circular duct is presented. Discrete sections of piezo-electrical film, PVDF, are used as actuators to adjust the tension of the membrane. Different control
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::2fcbbf9c1b34f74821ed7753136fda66
https://doi.org/10.1115/1.2874444
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5
Learnable Lessons on Sustainability From the Provision of Electricity in South Africa
Autor: A. J. Meyer, Matthew Kuperus Heun, M. Swilling, J. L. van Niekerk, Thomas Fluri, Alan C. Brent
Publikováno v: ASME 2010 4th International Conference on Energy Sustainability, Volume 1.
South Africa is a “canary in a coal mine” for the world’s upcoming ecological crises, especially regarding electrical energy provision for a developing modern society, because aspects of the South African situation may be repeated elsewhere whe
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::f01ee53ff5731b8039653d88f589c340
https://doi.org/10.1115/es2010-90071
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6
The development of a test specification to determine the rollover protection of passengers in light commercial vehicles fitted with canopies
Autor: E.J Honiball, J. L. van Niekerk
Publikováno v: Accident; analysis and prevention. 33(5)
In this paper, a basic test specification is proposed to assess the structural integrity of a canopy that covers the load-area of a light commercial vehicle (LCV) used to carry passengers in the rear. The proposed test specification is a first step t
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::354b587147ccc88b601b3f9851ff6c49
https://pubmed.ncbi.nlm.nih.gov/11491242
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8
Attenuation of Structurally Generated Interior Noise Through Active Control
Autor: X. H. Yang, K. S. Parwani, Benson H. Tongue, Andrew Packard, J. L. van Niekerk
Publikováno v: 1993 American Control Conference.
Active feedback control was used to modify the acoustic/structural dynamics in a reverberant acoustic enclosure. The physical system was modeled as a single-input, multi-output system and an H ? , design approach was used to obtain a robust controlle
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::6258cb1888361227f33aed8352892a43
https://doi.org/10.23919/acc.1993.4792790
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10
Conservative treatment of elbow dislocations in adults
Autor: J, van der Ley, J L, van Niekerk, B, Binnendijk
Publikováno v: The Netherlands journal of surgery. 39(6)
The results of 20 conservatively treated elbow dislocations were retrospectively studied in 20 adults older than 16 years. After an average follow-up of 5 1/2 years (range 2-10 years), 16 patients (80%) had good or excellent results. Only two patient
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=pmid________::0222942ea3db6b6056470a3c31b82f6e
https://pubmed.ncbi.nlm.nih.gov/3431718
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