A virtual workspace for hybrid multidimensional scaling algorithms

2004 ◽  
Author(s):  
G. Ross ◽  
M. Chalmers
Keyword(s):  
Multidimensional Scaling ◽  
Hybrid Multidimensional Scaling ◽  
Scaling Algorithms

scholarly journals A Visual Workspace for Constructing Hybrid Multidimensional Scaling Algorithms and Coordinating Multiple Views

2003 ◽  
Vol 2 (4) ◽  
pp. 247-257 ◽  
Author(s):  
Greg Ross ◽  
Matthew Chalmers
Keyword(s):  
Multidimensional Scaling ◽  
Visual Programming ◽  
Multiple Views ◽  
Data Volume ◽  
Algorithmic Techniques ◽  
Hybrid Multidimensional Scaling ◽  
Intermediate Views ◽  
And Control ◽  
The Impact ◽  
Scaling Algorithms

Data can be distinguished according to volume, variable types and distribution, and each of these characteristics imposes constraints upon the choice of applicable algorithms for their visualisation. This has led to an abundance of often disparate algorithmic techniques. Previous work has shown that a hybrid algorithmic approach can be successful in addressing the impact of data volume on the feasibility of multidimensional scaling (MDS). This paper presents a system and framework in which a user can easily explore algorithms as well as their hybrid conjunctions and the data flowing through them. Visual programming and a novel algorithmic architecture let the user semi-automatically define data-flows and the coordination of multiple views of algorithmic and visualisation components. We propose that our approach has two main benefits: significant improvements in run times of MDS algorithms can be achieved, and intermediate views of the data and the visualisation program structure can provide greater insight and control over the visualisation process.

Humpback whales (Megaptera novaeangliae) in Hervey Bay, Queensland: behaviour and responses to whale-watching vessels

1995 ◽  
Vol 73 (7) ◽  
pp. 1290-1299 ◽  
Author(s):  
Peter J. Corkeron
Keyword(s):  
Multidimensional Scaling ◽  
Megaptera Novaeangliae ◽  
Humpback Whales ◽  
Breeding Ground ◽  
Whale Watching ◽  
Short Term ◽  
Continuous Sampling ◽  
Commercial Use ◽  
Hybrid Multidimensional Scaling

The effects of the presence of vessels on the behaviour of humpback whales (Megaptera novaeangliae) was studied in Hervey Bay, Queensland, where southward-migrating whales are the focus of a commercial whale-watching industry. The behaviour of whales was observed from a small yacht under sail. Rates of occurrence of units of behaviour for entire pods were obtained from continuous sampling of pods. Pods without calves showed lower rates of behaviour generally when vessels were within 300 m of them. Pods both with and without calves were more likely to dive rather than slip under when vessels were within 300 m. Hybrid multidimensional scaling of rates of behaviours of pods indicated differences between suites of behaviours exhibited by pods when vessels were within 300 m of them and when they were not. Classification of the patterns of occurrence of behaviours demonstrated that for pods both with and without calves, different units of behaviour tended to occur together when vessels were within 300 m and when they were not. Whale watching offers a nonlethal commercial use of whales, but in Hervey Bay, whale watching affects the behaviour of whales, which, although migrating, can be involved in breeding ground activities. Whether the short-term behavioural changes described here are accompanied by longer term avoidance of Hervey Bay by humpback whales as they migrate south remains to be determined.

A new species of Lepidosperma (Cyperaceae) allied to L. congestum of southern Australia

2018 ◽  
Vol 31 (4) ◽  
pp. 357
Author(s):  
George T. Plunkett ◽  
Jeremy J. Bruhl ◽  
Karen L. Wilson
Keyword(s):  
New Species ◽  
Multidimensional Scaling ◽  
Conservation Status ◽  
South Australia ◽  
Morphological Characters ◽  
Herbarium Material ◽  
Hybrid Multidimensional Scaling ◽  
A New Species

We investigated the limits of Lepidosperma congestum R.Br. and a putative new species of Lepidosperma Labill. from Victoria and South Australia. Phenetic analyses (flexible UPGMA agglomerative hierarchical fusion and semi-strong hybrid multidimensional scaling) were conducted on a dataset derived from morphological characters scored from herbarium material. The results of our analyses supported the recognition of a new species, which we describe here as Lepidosperma hispidulum G.T.Plunkett, J.J.Bruhl & K.L.Wilson. Our results clarified the differences among L. congestum, L. laeve R.Br. and L. hispidulum, the first two of which have often been misidentified. We also discuss the distribution, habitat and conservation status of L. hispidulum.

Is Multidimensional Scaling Magic or Science?

1988 ◽  
Vol 33 (10) ◽  
pp. 874-875 ◽  
Author(s):  
James O. Ramsey
Keyword(s):  
Multidimensional Scaling
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