[1] We find that the standard deviation, hence error, of the water surface elevation data from the Shuttle Radar Topography Mission (SRTM) is 5.51 m for basin-wide, regional and local Amazon mainstem reaches. This error implies a minimum reach length of 733km in order to calculate a reliable water-surface slope. Resulting slopes are 1.92 ± 0.19 cm/km for Manacapuru, 2.86 ± 0.24 cm/km for Itapeu...

This paper presents a lyrics retrieval system called LyricsRadar that enables users to interactively browse song lyrics by visualizing their topics. Since conventional lyrics retrieval systems are based on simple word search, those systems often fail to reflect user’s intention behind a query when a word given as a query can be used in different contexts. For example, the word“tears”can appear ...

In this thesis, a 3D approach to visualize software metrics is presented. Software metrics are attributes of a piece of software or its specification. They generally contain a set of multivariate time-series data and can be displayed, for example, as a Kiviat diagram consisting of axes and polylines. The aim of this work is to design a Win32 application that can load multivariate time-series da...

This paper reports two experiments that address the question of how the shape characteristics of star plot glyphs influence classification tasks and whether additional graphic features such as color can be used to counterbalance the effects of shape characteristics. In a previous study (Klippel, Hardisty, & Weaver, to appear, 2009) we found that salient shapes of star plot glyphs such as “has o...

Spider graphs are the intersection graphs of subtrees of subdivisions of stars. Thus, spider graphs are chordal graphs that form a common superclass of interval and split graphs. Motivated by previous results on the existence of Hamilton cycles in interval, split and chordal graphs, we show that every 3/2-tough spider graph is hamiltonian. The obtained bound is best possible since there are (3/...

Long term business success is highly dependent on how fast the business reacts on the changes in the market situation. Those who want to be successful need relevant, in-time and accurate information. Balanced Scorecard Simulator is a management tool that can be used efficiently in the processes of planning, decision and controlling. Based on the Balanced Scorecard concept the program combines i...

This paper presents a research project suggesting the use of real-time 3D techniques normally used in simulation environments as a navigation aid onboard ships. Based on a three-dimensional geographical database the surrounding world is presented in a “bridgeeye perspective” with navigational information such as own track, other ships in the vicinity and their tracks, water depth and radar echo...

Online auctions have demonstrated how e-commerce can transform business, and not merely transplanting conventional processes to a new medium. The resulting emergence and growth of diverse markets pose the intriguing question of what ‘shape’ a given market is in at a particular moment of development. The approach of Topological Analysis, which is based on the Star Plot method in data visualizati...

A topological model is presented for complex data sets in which the attributes can be cast into a dichotomy. It is shown that the relative dominance of the two parts in such a dichotomy can be measured by the corresponding areas in its star plot. An optimization model is proposed to maximize the resolution of such a measure by choice of configuration of the attributes, as well as the angles amo...

Knowledge audit lays a concrete foundation for any knowledge management programs. The central topic of this paper is to integrate various knowledge audit related techniques into pre-audit preparation, in-audit process and post-audit analysis in a systematic manner. Culture assessment, in the form of surveys and radar charts, along with orientation program make up the pre-audit preparation. Stru...