<< Chapter < Page Chapter >> Page >

The human visual system: the user is key.

Will Schroeder et al. in The Visualisation Toolkit (Schroder et al. 1998) stated “informally visualisation is the transformation of data or information into pictures. Visualisation engages the primal human sensory apparatus, vision, as well as the processing power of the human mind. The result is a simple and effective medium for communicati ng complex and/or voluminous information.” Based upon using the massive amount of brain power within the human visual system that constitutes about 1/3 of the total brain size, visualizations have been shown to be one of the best and sometimes the only way of conveying a huge amount of data in a short period of time. One of the key reasons for visualization as a specific field to study was the rapid increase in quantity of data being produced by simulations on supercomputers of physical, natural and theoretical problems. This has been termed as the data-deluge problem and frequently has been so large that graphical representations offer the only viable way to assimilate the data.

The simulation models themselves have also been increasing in complexity, involving large numbers of independent and dependent variables whose relationships need to be understood. For example, in climate modelling, we may wish to explore how temperatures, water vapour content, pressure, wind directions and velocities vary within a 3D region, over time and all at once. The process of visualization is therefore concerned with ways to represent the data as well as defining tools for interactively exploring the multidimensional and multi-variant models. One of the early active research areas was to find ways to link this visualization process with interactive control of the simulations themselves, opening up completely new possibilities for interactive exploration and understanding of complex phenomena. Over the years a number of visualization systems have emerged, which provide a framework for this kind of model exploration.

Visualization tools: evaluating a graph

Plenty of literature and course notes are now available but as a simple example, a few rules are presented next on how to create an effective graph. A graph should present a reasonable amount of data, say something about the behaviour of that data and it should avoid giving a false impression of the data. In other words, the graph must communicate something. Tukey (1977) pp 128,157 said t here cannot be too much emphasis on our need to see behaviour. Graphs force us to note the unexpected; nothing could be more important” .

Excel and MATLAB are two of the most popular visualization tools currently used, even though users may not consider them as such. They produce numerous 2D and 3D graphs of different sizes and dimensions but the visualization choices are rarely thought about. Figure 2 shows two views using MATLAB of a simple formulae (y = (x-1) -2 + 3(x-2) -2 ). Both show the same numerical sampled data but the second, by cropping the y-axis to a limited range [0:50], could be said to present a large amount of extra information highlighting an important area. This process has been termed focus and context zoom interaction.

Questions & Answers

Preparation and Applications of Nanomaterial for Drug Delivery
Hafiz Reply
Application of nanotechnology in medicine
what is variations in raman spectra for nanomaterials
Jyoti Reply
I only see partial conversation and what's the question here!
Crow Reply
what about nanotechnology for water purification
RAW Reply
please someone correct me if I'm wrong but I think one can use nanoparticles, specially silver nanoparticles for water treatment.
Damian
yes that's correct
Professor
I think
Professor
what is the stm
Brian Reply
is there industrial application of fullrenes. What is the method to prepare fullrene on large scale.?
Rafiq
industrial application...? mmm I think on the medical side as drug carrier, but you should go deeper on your research, I may be wrong
Damian
How we are making nano material?
LITNING Reply
what is a peer
LITNING Reply
What is meant by 'nano scale'?
LITNING Reply
What is STMs full form?
LITNING
scanning tunneling microscope
Sahil
how nano science is used for hydrophobicity
Santosh
Do u think that Graphene and Fullrene fiber can be used to make Air Plane body structure the lightest and strongest. Rafiq
Rafiq
what is differents between GO and RGO?
Mahi
what is simplest way to understand the applications of nano robots used to detect the cancer affected cell of human body.? How this robot is carried to required site of body cell.? what will be the carrier material and how can be detected that correct delivery of drug is done Rafiq
Rafiq
if virus is killing to make ARTIFICIAL DNA OF GRAPHENE FOR KILLED THE VIRUS .THIS IS OUR ASSUMPTION
Anam
analytical skills graphene is prepared to kill any type viruses .
Anam
Any one who tell me about Preparation and application of Nanomaterial for drug Delivery
Hafiz
what is Nano technology ?
Bob Reply
write examples of Nano molecule?
Bob
The nanotechnology is as new science, to scale nanometric
brayan
nanotechnology is the study, desing, synthesis, manipulation and application of materials and functional systems through control of matter at nanoscale
Damian
Is there any normative that regulates the use of silver nanoparticles?
Damian Reply
what king of growth are you checking .?
Renato
What fields keep nano created devices from performing or assimulating ? Magnetic fields ? Are do they assimilate ?
Stoney Reply
why we need to study biomolecules, molecular biology in nanotechnology?
Adin Reply
?
Kyle
yes I'm doing my masters in nanotechnology, we are being studying all these domains as well..
Adin
why?
Adin
what school?
Kyle
biomolecules are e building blocks of every organics and inorganic materials.
Joe
anyone know any internet site where one can find nanotechnology papers?
Damian Reply
research.net
kanaga
sciencedirect big data base
Ernesto
Introduction about quantum dots in nanotechnology
Praveena Reply
hi
Loga
Got questions? Join the online conversation and get instant answers!
Jobilize.com Reply

Get the best Algebra and trigonometry course in your pocket!





Source:  OpenStax, Research in a connected world. OpenStax CNX. Nov 22, 2009 Download for free at http://cnx.org/content/col10677/1.12
Google Play and the Google Play logo are trademarks of Google Inc.

Notification Switch

Would you like to follow the 'Research in a connected world' conversation and receive update notifications?

Ask