scholarly journals 'n Multidimensionele skaleringstudie van personeelkonsultantgroepe in Suid Afrika

1988 ◽  
Vol 14 (2) ◽  
Author(s):  
C. C. Theron ◽  
L. C. De Jager
Keyword(s):  
South Africa ◽  
Multidimensional Scaling ◽  
Ideal Point ◽  
Stimulus Space

A multidimentional scaling study of personnel consultancy groups in South Africa. Ten 12x12 symetric dissimilarity matrices of inter personnel consultant comparisons were submitted to weigthed multidimensional scaling. Vector and ideal point models were used to relate preference and con- sultant attributes to the group stimulus space. Results indicate that the hypothetical ideal consultant differs significantly from existing consultancies and that there exists a partial incongruence between the attributes used spontaneously when comparing a number of consultancies and the critical consultant attributes identified in the literature. Recommendations for further research are made. Opsomming Tien 12x12 simmetriese dissimilariteitsmatrikse van interpersoneelkonsultante-beoordelings is onderwerp aan matriksgeweegde multidimensionele skating. Vektor n "ideal point" modelle is gebruik om voorkeur en konsultantattribute met die groepstimulusruimte in verband te bring. Resultate dui daarop dat die hipotetiese ideate konsultant betekenisvol verskil van bestaande konsultantaanbiedinge en dat daar 'n element van inkongruensie bestaan tussen die attribute wat spontaan na vore tree by onderlinge vergelyking van konsultantgroepe en die kritieke attribute soos deur die literatuur geidentifiseer. Aanbevelings vir verdere studie word gemaak.

scholarly journals Do arthropod assemblages fit the grassland and savanna biomes of South Africa?

2016 ◽  
Vol Volume 112 (Number 9/10) ◽  
Author(s):  
Monique Botha ◽  
Stefan J. Siebert ◽  
Johnnie van den Berg ◽  
◽  
◽  
...  
Keyword(s):  
South Africa ◽  
Multidimensional Scaling ◽  
Vegetation Structure ◽  
Species Assemblages ◽  
Trophic Groups ◽  
Arthropod Communities ◽  
Arthropod Species ◽  
Scaling Analyses ◽  
Suction Sampling ◽  
Functional Assemblages

Abstract The long-standing tradition of classifying South Africa’s biogeographical area into biomes is commonly linked to vegetation structure and climate. Because arthropod communities are often governed by both these factors, it can be expected that arthropod communities would fit the biomes. To test this hypothesis, we considered how well arthropod species assemblages fit South Africa’s grassy biomes. Arthropod assemblages were sampled from six localities across the grassland and savanna biomes by means of suction sampling, to determine whether the two biomes have distinctive arthropod assemblages. Arthropod samples of these biomes clustered separately in multidimensional scaling analyses. Within biomes, arthropod assemblages were more distinctive for savanna localities than grassland. Arthropod samples of the two biomes clustered together when trophic groups were considered separately, suggesting some similarity in functional assemblages. Dissimilarity was greatest between biomes for phytophagous and predacious trophic groups, with most pronounced differentiation between biomes at sub-escarpment localities. Our results indicate that different arthropod assemblages do fit the grassy biomes to some extent, but the pattern is not as clear as it is for plant species.

A revision of Australian and New Zealand Tethya (Porifera : Demospongiae) with a preliminary analysis of species-groupings

2004 ◽  
Vol 18 (2) ◽  
pp. 117 ◽  
Author(s):  
Michele Sarà ◽  
Antonio Sarà
Keyword(s):  
South Africa ◽  
Cluster Analysis ◽  
New Species ◽  
New Zealand ◽  
Multidimensional Scaling ◽  
Preliminary Analysis ◽  
Valid Species ◽  
Species List ◽  
New Findings ◽  
Species Groups

Australian and New Zealand Tethya Lamarck, 1814 species have been revised on the basis of museum material and new findings. Ten new species: T. acuta, T. burtoni, T. dendyi, T. expansa, T. flexuosa, T. gunni, T.�hooperi, T. pulitzeri, T. stellodermis and T. tasmaniae are described. Tethya gigantea (von Lendenfeld, 1888), here recognised as a valid species, and T. magna Kirkpatrick, 1903, hitherto known only from South Africa, are redescribed. New observations and taxonomic remarks have been provided for: T. bergquistae, T. corticata, T.�deformis, T. inflata, T. phillipensis, T. ingalli, T. laevis, T. monstrosa, T. orphei, T. robusta, T. seychellensis and T.�tuberculata. The revised species list includes 31 valid species, most of which are endemic to Australia or New Zealand. Species-groups within the genus were investigated using cluster analysis and multidimensional scaling.

The putative impact of exploitation on rocky infratidal macrofaunal assemblages: a multiple-area comparison

1999 ◽  
Vol 79 (1) ◽  
pp. 23-34 ◽  
Author(s):  
Theresa Lasiaka
Keyword(s):  
South Africa ◽  
Species Composition ◽  
Multidimensional Scaling ◽  
Functional Groups ◽  
Regional Differences ◽  
Southern Region ◽  
The Other ◽  
Major Species ◽  
Northern Regions ◽  
The Right

The putative impact of subsistence foragers along the Transkei coast of South Africa was determined by comparing the community-level attributes of infratidal macrofaunal assemblages in three ‘no-take’ reserves with those at adjacent exploited localities. The objective of this study was to ascertain whether the differences in the assemblages found at exploited and non-exploited localities were consistent along this coast. Two-way ANOVAs indicated that the presence/absence of exploitation had no effect on univariate community measures. Macrofaunal biomass was the only measure which showed significant differences amongst locations and interaction effects. Abundance/biomass comparison curves revealed that all the exploited sites except one showed the configuration typical of moderately disturbed sites and that all the non-exploited sites except one showed the trend typical of undisturbed sites. Two-way crossed ANOSIM tests indicated that treatment and location both had significant effects on these assemblages and that there were also significant differences between each pair of locations. The latter probably reflects regional differences in species composition due to the fact that this coast lies at the junction of two zoogeographic marine provinces. The multidimensional scaling (MDS) ordinations derived from abundance and biomass estimates revealed two major clusters of sites, one representing sites in the southern region and the other sites within the central and northern regions. The non-exploited sites within each region were situated above and to the right of the corresponding exploited sites. Similarity percentage analyses (SIMPER) indicated that the major species contributing to the average dissimilarity between the exploited and non-exploited localities varied regionally. There was, however, a fair amount of consistency in terms of the functional groups highlighted by these analyses. Some of the species adversely affected by exploitation are dependent on primary substrata either for their food supplies or for attachment. Likewise many of the species which appeared to benefit from exploitation were phytal-associated forms.

A Single Ideal Point Model for Market Structure Analysis

1995 ◽  
Vol 32 (4) ◽  
pp. 433-443 ◽  
Author(s):  
David B. Mackay ◽  
Robert F. Easley ◽  
Joseph L. Zinnes
Keyword(s):  
Multidimensional Scaling ◽  
Product Space ◽  
Ideal Point ◽  
Simulated Data ◽  
Point Model ◽  
Deterministic Models ◽  
Preference Data ◽  
Dissimilarity Data ◽  
Market Structure Analysis ◽  
Product Maps

Computing unsegmented product maps from preference data by means of single ideal point models is commonly thought to be impossible because of indeterminacy problems. The authors show that this mathematical indeterminacy can be overcome by incorporating dependent sampling assumptions into a probabilistic multidimensional scaling (MDS) model. As a result, product space maps can be estimated for single markets from preference data alone. If desired, dissimilarity data can be combined with preference data to produce jointly estimated product space maps. The authors illustrate the advantages of the proposed approach with real and simulated data. They also make comparisons to both internal and external deterministic models. The results are favorable.

Time and Latitude in South Africa

1972 ◽  
Vol 1 ◽  
pp. 27-38
Author(s):  
J. Hers
Keyword(s):  
South Africa ◽  
Cape Town ◽  
Astronomical Observations ◽  
Royal Observatory ◽  
The Republic ◽  
Astronomical Determination ◽  
Limited Accuracy ◽  
Better Than

In South Africa the modern outlook towards time may be said to have started in 1948. Both the two major observatories, The Royal Observatory in Cape Town and the Union Observatory (now known as the Republic Observatory) in Johannesburg had, of course, been involved in the astronomical determination of time almost from their inception, and the Johannesburg Observatory has been responsible for the official time of South Africa since 1908. However the pendulum clocks then in use could not be relied on to provide an accuracy better than about 1/10 second, which was of the same order as that of the astronomical observations. It is doubtful if much use was made of even this limited accuracy outside the two observatories, and although there may – occasionally have been a demand for more accurate time, it was certainly not voiced.

Indirect Rule in South Africa

2009 ◽  
Author(s):  
J. C. Myers
Keyword(s):  
South Africa ◽  
Indirect Rule

Combining Professional Interests and Travel: People to People Citizen Ambassador Program

2011 ◽  
Vol 1 (2) ◽  
pp. 47-54
Author(s):  
Alex Johnson ◽  
Amanda Hitchins
Keyword(s):  
South Africa ◽  
Health Education ◽  
Communication Disorders ◽  
Social Conditions ◽  
Speech Language Pathologists ◽  
Exchange Program

Abstract This article summarizes a series of trips sponsored by People to People, a professional exchange program. The trips described in this report were led by the first author of this article and include trips to South Africa, Russia, Vietnam and Cambodia, and Israel. Each of these trips included delegations of 25 to 50 speech-language pathologists and audiologists who participated in professional visits to learn of the health, education, and social conditions in each country. Additionally, opportunities to meet with communication disorders professionals, students, and persons with speech, language, or hearing disabilities were included. People to People, partnered with the American Speech-Language-Hearing Association (ASHA), provides a meaningful and interesting way to learn and travel with colleagues.

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