On the use of cartographic projections in visualizing phylo-genetic tree space

Phylogenetic analysis is becoming an increasingly important tool for biological research. Applications include epidemiological studies, drug development, and evolutionary analysis. Phylogenetic search is a known NP-Hard problem. The size of the data sets which can be analyzed is limited by the exponential growth in the number of trees that must be considered as the problem size increases. A better understanding of the problem space could lead to better methods, which in turn could lead to the feasible analysis of more data sets. We present a definition of phylogenetic tree space and a visualization of this space that shows significant exploitable structure. This structure can be used to develop search methods capable of handling much larger data sets

A generic algorithm for layout of biological networks

BackgroundBiological networks are widely used to represent processes in biological systems and to capture interactions and dependencies between biological entities. Their size and complexity is steadily increasing due to the ongoing growth of knowledge in the life sciences. To aid understanding of biological networks several algorithms for laying out and graphically representing networks and network analysis results have been developed. However, current algorithms are specialized to particular layout styles and therefore different algorithms are required for each kind of network and/or style of layout. This increases implementation effort and means that new algorithms must be developed for new layout styles. Furthermore, additional effort is necessary to compose different layout conventions in the same diagram. Also the user cannot usually customize the placement of nodes to tailor the layout to their particular need or task and there is little support for interactive network exploration.ResultsWe present a novel algorithm to visualize different biological networks and network analysis results in meaningful ways depending on network types and analysis outcome. Our method is based on constrained graph layout and we demonstrate how it can handle the drawing conventions used in biological networks.ConclusionThe presented algorithm offers the ability to produce many of the fundamental popular drawing styles while allowing the exibility of constraints to further tailor these layouts.publishe

Straight-Line Drawings of Protein Interactions

This paper presents the first attempt at automatically generating drawings of protein interaction graphs. Such graphs are large and not necessarily connected. A straight-line drawing method based on the spring embedder metaphor has been found highly suitable for this task. The drawings produced exhibit edge length uniformity, even vertex distribution, and preserve graph topology well. This method is capable of generating both two- and three-dimensional layouts. A preliminary evaluation has been carried out based on a representative collection of interaction graphs

Proximity visualisation of abstract data

SIGLEAvailable from British Library Document Supply Centre-DSC:8723.247(no 509) / BLDSC - British Library Document Supply CentreGBUnited Kingdo

Закономерности рационального торможения активных тракторных поездов

The article presents the main mathematical analytical expression patterns of breaking tractor at work with coupled trailer having a drive wheel. The mathematical analysis of the dynamics to improve the breaking of the tractor aggregate is concluded from the research.В статье приведены основные математическо-аналитические выражения закономерностей торможения полноприводного трактора при работе в сцепе с прицепом, имеющим привод на колеса, и выводы из их анализа по улучшению динамики торможения таких тракторных поездов

Presenting and visualizing image results for professional image searchers: A field evaluation

Creative professionals such as journalists and copywriters are an important group of users who need to search for images as part of their work task. We describe the design and evaluation of a 'high density' image search interface targeted at this user group. We use a field evaluation together with a qualitative approach with creative professionals to gather feedback on the high density in-terface design. Our results show that creative professional viewed the interface favourably be-cause they were able to get a quick overview of research results. We make suggestions for the ap-propriateness of high density interfaces for different work contexts, and further work in terms of layouts of images in high density interfaces

Presenting and visualizing results on an image retrieval user interface

The volume of images available online has increased significantly but the choices offered by image retrieval systems have not kept pace. We describe the design and evaluation of a ‘high density’ image search interface focusing on the results pages. We quantitatively and qualitatively compared image presentation on a high density interface with a traditional image search interface. Our results show that users had major problems with high-density interfaces for images due to information overload. We point to further work which could improve the user experience