Music: MUC 221
- Authors: Lloyd, G , Ncozana, J , Bleibinger, B
- Date: 2011-01
- Subjects: Music
- Language: English
- Type: Examination paper
- Identifier: vital:18104 , http://hdl.handle.net/10353/d1010855
- Description: Music: MUC 221, supplementary examination paper January 2011.
- Full Text: false
- Date Issued: 2011-01
Physical Chemistry: PAC 324
- Authors: Sadimenko, A , Purcell, W
- Date: 2011-01
- Language: English
- Type: Examination paper
- Identifier: vital:17823 , http://hdl.handle.net/10353/d1010376
- Description: Physical Chemistry: PAC 324, supplementary examination January 2012.
- Full Text: false
- Date Issued: 2011-01
Computer Graphics: CSC 521
- Authors: Chadwick, J , Vogts, D
- Date: 2010-11
- Language: English
- Type: Examination paper
- Identifier: vital:17783 , http://hdl.handle.net/10353/d1010323
- Description: Computer Graphics: CSC 521, homours examination November 2010.
- Full Text: false
- Date Issued: 2010-11
GIS for Decision Support: GIS 503
Organic Chemistry 2: PAC 223
- Authors: Manene, N C , Tichagwa, L
- Date: 2010-11
- Language: English
- Type: Examination paper
- Identifier: vital:17842 , http://hdl.handle.net/10353/d1010451
- Description: Organic Chemistry 2: PAC 223, degree examination November 2010.
- Full Text: false
- Date Issued: 2010-11
Technology for Educators: EDT 221
- Authors: Vye, Z , Tyilo, P N
- Date: 2010-11
- Subjects: Education
- Language: English
- Type: Examination paper
- Identifier: vital:17346 , http://hdl.handle.net/10353/d1010208
- Description: Examination on Technology for Educators: EDT 221, November 2010.
- Full Text: false
- Date Issued: 2010-11
Commercial Law 2: LCM 221
- Authors: Stewart, S T , Lubisi, N
- Date: 2010-10
- Subjects: Commercial law
- Language: English
- Type: Examination paper
- Identifier: vital:17401 , http://hdl.handle.net/10353/d1009875
- Description: Commercial Law 2: LCM 221, October/November Examination Paper 2010
- Full Text: false
- Date Issued: 2010-10
Plant Cell Structure & Metabolism/Anatomy/Genetics: BOT 111
- Authors: Buwa, L , Magwa, M L , Mhinana, Z M
- Date: 2010-08
- Subjects: Botany
- Language: English
- Type: Examination paper
- Identifier: vital:17729 , http://hdl.handle.net/10353/d1010177
- Description: Plant Cell Structure & Metabolism/Anatomy/Genetics: BOT 111, supplementary examination August 2010.
- Full Text: false
- Date Issued: 2010-08
History of Education: EDB 411
- Authors: Botha, E K , Mapasa, E T
- Date: 2010-07
- Subjects: Education
- Language: English
- Type: Examination paper
- Identifier: vital:17304 , http://hdl.handle.net/10353/d1010149
- Description: Supplementary examination on History of Education: EDB 411 July 2010.
- Full Text: false
- Date Issued: 2010-07
Organic Chemistry 1: PAC 213
- Authors: Manane, N C , Tichagwa, L
- Date: 2010-07
- Language: English
- Type: Examination paper
- Identifier: vital:17826 , http://hdl.handle.net/10353/d1010380
- Description: Organic Chemistry 1: PAC 213, supplementary examination July 2010.
- Full Text: false
- Date Issued: 2010-07
Basic Chemistry: PAC 111F
- Authors: Soyaya, S M , Sadimenko, A
- Date: 2010-06
- Language: English
- Type: Examination paper
- Identifier: vital:17827 , http://hdl.handle.net/10353/d1010381
- Description: Basic Chemistry: PAC 111F, degree examinatino June 2010.
- Full Text: false
- Date Issued: 2010-06
Geology (Geostatistics and Data Analysis, Economic Geology): GLG 323
- Authors: Jia, H , Kroll, G S R , Huizenga, J M
- Date: 2010-02
- Subjects: Geology
- Language: English
- Type: Examination paper
- Identifier: vital:17874 , http://hdl.handle.net/10353/d1011002
- Description: Geology (Geostatistics and Data Analysis, Economic Geology): GLG 323, supplementary examination February 2010.
- Full Text: false
- Date Issued: 2010-02
Aspects of the reproductive biology of monkfish Lophius vomerinus off Namibia
- Authors: Maartens, Lima , Booth, Anthony J
- Date: 2010
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/123831 , vital:35504 , https://doi.10.2989/18142320509504090
- Description: Aspects of the reproductive biology of monkfish Lophius vomerinus are described from material collected during hake Merluccius spp. biomass surveys and from commercial monkfish and sole Austroglossus microlepis vessels between January 1996 and June 2000 off Namibia at depths between 97m and 686m. Length-at-50% sexual maturity for males and females were estimated at 39.9cm and 58.2cm respectively, males maturing faster than females. The adult sex ratio of fish >50cm total length was strongly biased towards females. There was reproductive activity throughout the year, peaking slightly between autumn and spring.
- Full Text:
- Date Issued: 2010
Control and integrability on SO (3)
- Authors: Remsing, C C
- Date: 2010
- Language: English
- Type: Article
- Identifier: vital:6787 , http://hdl.handle.net/10962/d1006938
- Description: This paper considers control ane left- invariant systems evolving on matrix Lie groups. Such systems have signicant applications in a variety of elds. Any left-invariant optimal control problem (with quadratic cost) can be lifted, via the celebrated Maximum Principle, to a Hamiltonian system on the dual of the Lie algebra of the underlying state space G. The (minus) Lie-Poisson structure on the dual space g is used to describe the (normal) extremal curves. An interesting, and rather typical, single-input con- trol system on the rotation group SO (3) is investi- gated in some detail. The reduced Hamilton equa- tions associated with an extremal curve are derived in a simple and elegant manner. Finally, these equations are explicitly integrated by Jacobi elliptic functions.
- Full Text:
- Date Issued: 2010
Extending Java’s communication mechanisms for multicore processors
- Authors: Wells, George C
- Date: 2010
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/430526 , vital:72697 , https://citeseerx.ist.psu.edu/document?repid=rep1type=pdfdoi=4068ed60c317e81dc70288cf36ff586dc057233f
- Description: With the current trend towards the increased use of multicore proces-sors, there is a growing need for simple, efficient parallel programming mechanisms. While Java has good support for multithreaded and dis-tributed application development, our research into tuple-space systems for multicore processors highlighted a gap in the concurrency facilities available in Java. This arises in the context of independent applications (running in separate virtual machines) that need to synchronise their ac-tivities or communicate with each other. There are several possible solu-tions to this problem, ranging from extensions to the language and/or runtime environment through to the use of distributed programming methods. Using the latter introduces considerable performance over-heads, and so we explored the use of the Java Native Interface in order to take advantage of the interprocess communication (IPC) facilities pro-vided by the underlying operating system. The analysis and comparison of the performance of the standard approaches and our prototype library suggest that there are real benefits to be gained by alternative ap-proaches to the provision of IPC mechanisms for independent Java programs executing on multicore systems. We hope that these findings will spur further investigation of this problem and other possible solu-tions.
- Full Text:
- Date Issued: 2010
Male aggression and mating opportunity in a poeciliid fish
- Authors: Magellan, Kit , Kaiser, Horst
- Date: 2010
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/447556 , vital:74656 , https://doi.org/10.1080/15627020.2010.11657250
- Description: One function of aggression in animals is to gain access to mates. Aggression may therefore be favoured by sexual selection, the strength of which can be assessed using repeatability of aggressive behaviour. Here, we tested the hypotheses that male swordtails, Xiphophorus sp., are consistent in the aggressive and mating behaviours exhibited and in the time spent at a close distance to females (female attendance), and that aggressive males gain increased opportunity to attempt copulation compared to their less aggressive conspecifics (sneak frequency). As predicted, aggression between males, and male display and sneak frequency were repeatable. However, male aggression was not significantly correlated with sneak frequency. The function of aggression in this species is not clear-cut and may have an indirect female access function through formation of dominance hierarchies or defence of resources. A surprising finding highlighted by this study was the contradictory results for consistency in female contact, with high repeatability scores indicating consistency in behaviour but the within-subjects component of repeated measures ANOVA showing differences in female contact between trials. The possible reasons for this discrepancy are discussed.
- Full Text:
- Date Issued: 2010
Regional patterns in moult and sexual dimorphism of adult Southern Red Bishops Euplectes orix in southern Africa
- Authors: Craig, Adrian J F K , Bonnevie, Bo T , Oschadleus, Hans-Dieter
- Date: 2010
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/449503 , vital:74826 , https://doi.org/10.2989/00306525.2010.488357
- Description: Using the SAFRING database and the Underhill-Zucchini model of primary moult, we analysed the timing of wing moult in Southern Red Bishops Euplectes orix in relation to sex and geographical region. Birds from the winter rainfall region in the south-western sector of the Western Cape start the annual moult more than two months before any other population, but there were no significant differences in starting date within the summer rainfall region. There were striking differences in the estimates of moult duration (62–114 d), which did not follow a consistent pattern in relation to sex or geography; annual variation within a region may be an additional factor. Throughout southern Africa, both sexes showed a trend for longer-winged birds to take more time to complete their moult. We suggest that sex, geographical area and possible annual environmental variations may all influence the timing of moult in local populations. In this sexually dimorphic species, males are consistently longer-winged and heavier than females.
- Full Text:
- Date Issued: 2010
The effects of economic incentives in controlling pollution in the South African leather industry: die uitwerking van ekonomiese insentiewe op die beheer van besoedeling in die Suid-Afrikaanse leerbedryf
- Authors: Mowat, Shaun P , Antrobus, Geoffrey G , Fraser, Gavin C G
- Date: 2010
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/143057 , vital:38197 , DOI: 10.1080/03031853.1997.9523487
- Description: Pollution of the environment is becoming an increasingly serious problem. A large contributor to this is industry which generates effluent as a by-product of its production process. Two methods of controlling the pollution generated by industry are the so-called “command and control” techniques and economic incentives. In theory, economic incentives promise a more economically efficient and equitable means of pollution control. This paper sets out to ascertain whether this would hold in practice by applying environmental economic theory to the practical problem of controlling the effluent generated by one particular industry, viz the South African leather industry.
- Full Text:
- Date Issued: 2010
Thermoregulation under seminatural conditions in two species of African barbets (Piciformes Lybiidae)
- Authors: McKechnie, Andrew E , Smit, Ben
- Date: 2010
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/448413 , vital:74728 , https://doi.org/10.2989/00306525.2010.488384
- Description: Torpor has been documented in a number of avian orders, but our understanding of the phylogenetic distribution of this phenomenon is far from complete, and several groups have yet to be investigated. We examined patterns of rest- and active-phase thermoregulation in Acacia Pied Barbets Lybius leucomelas and Crested Barbets Trachyphonus vaillantii held in outdoor aviaries, using surgically-implanted miniature data loggers to record body temperature (Tb). Both species exhibited large circadian rhythms of Tb, with maximum active-phase and minimum rest-phase Tb (ρTbmin) values of 42.3 ± 0.1 °C and 37.7 ± 0.6 °C, respectively, in Acacia Pied Barbets (n = 3) and 42.5 ± 0.4 °C and 37.0 ± 0.6 °C, respectively, in Crested Barbets (n = 5).
- Full Text:
- Date Issued: 2010
Timing of primary wing moult in sexually dimorphic passerines from the Western Cape, South Africa
- Authors: Bonnevie, Bo T , Oschadleus, Hans-Dieter
- Date: 2010
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/448355 , vital:74724 , https://doi.org/10.2989/00306525.2010.455821
- Description: SAFRING ringing data was used to investigate the differences in the timing and duration of primary wing moult between males and females of sexually dimorphic passerines from the Western Cape, South Africa. In the sunbirds, weavers and canaries that were considered, the males generally started moult before the females, whereas this was not so for other species. In the species where males started moult before the females, the standard deviation of the start of moult was generally smaller in the males and the males generally took longer to moult. These differences in the patterns of moult are discussed in the context of differences in parental care between males and females of each species and within their taxonomic groups.
- Full Text:
- Date Issued: 2010