Source of Model: National Instruments; M.E.Electronics Ltd, Reading

Computer Language that the model is developed in:

Hardware needed to run model: Macintosh - versions available for IBM PC or clone

Data Inputs needed by model:
A. Labview - analogue signals from transducer - rocker, computer, strain gauges, computer, pressure cells, transducers
B. CONCEPT VI - video Images of tree swaying
C. Cricket - Data analysis (MAC)

The two applications of the models are:
1. The dynamic analysis of a tree under forced rocking
2. The video analysis of a tree under forced/natural rocking

Model outputs

Tables of deflections and pressures

Graphs of deflections and pressures

Statistics of deflections and pressures

Superimposition of images

VII Accuracy/Sources of Uncertainty/Method of Handling

Depends on accuracy of transducers

VIII Existing linkages between data (eg in databases) and software (eg databases/GIS/Statistical packages)

Labview can receive data and has a full range of statistical routines.

Concept can also take images and process these statistically

IX GIS Software used

none

X Modelling Software used

Labview, Concept VI

Database Software used

Any other comments

The work mainly concerns a single tree. Labview has been
used in the past to sample data from transducers and plot the information
in graphical form. Labview has extensive statistical facilities. Programs
can be written in Labview with an ICON-based language. The version of
Labview we have is on a Macintosh Centris; this is the platform that
Labview came out on originally. We are now beginning to use Concept VI
in conjunction iwth Labview. Concept VI enables us to take images of
trees moving in the wind and process these images. Cricket graph is
another program we find useful for plotting data. We would have access
to a wide range of database and GIS systems; to date we have not used them.