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1994-11-23
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Why should a school fork out £99 + VAT for a collection of "clip-art"?
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This is a reasonable question as £99 is a big investment (in
education circles) and clip-art may be had from countless public domain
sources and companies specialising in low-cost graphics. The real questions
to ask of ourselves and the competition are :
1. How much of the material is directly relevant to British science and
technology education?
2. How easily can you access a suitable graphic from a multitude of sources
3. How compatible are graphics with each other in terms of scale, line
thickness and content?
4. Have the graphics been drawn by subject specialists in science and
technology?
5. Are the graphics derived from other machine formats or have they been
drawn by and for the Arc?
6. Are the graphics used day-by-day in staff development material and
publications for educationalists?
7. Is there on-going development in the scope and quality of the graphics
material?
8. How widely is similar software used in educational establishments
already?
We answer these questions from our own perspective and ask any prospective
purchasers to ask the same questions of other suppliers of what may appear
to be similar software. We think you may find the SSERC Graphics Collections
CD-ROM to be unique in content, applicability and value-for-money.
1. SSERC is a national service agency providing advice, information,
consultancy and training on science and technology equipment and facilities.
The graphics and applications have arisen as a useful by-product of what we
do for Scottish teachers. Every three months, to keep teachers up-to-date on
the latest equipment, practical techniques and health & safety matters, we
publish the SSERC Science and Technology Bulletin (normally 36-40 A4 DTP'd
pages typeset on Acorn machines running Impression II, Vector, Revelation II
and Draw software).
As each SSERC Bulletin is put together, new graphics have to be created to
support the articles therein. Equipment already drawn makes the compilation
of apparatus set-ups quick and easy. Similar development supports teacher
and technician in-service courses for equipment usage, health and safety
practice, applications of modern instrumentation and usage of information
technologies. Therefore all material has a direct relevance to education now
and in the foreseeable future.
2. When SSERC started with the Graphics Libraries it was a relatively simple
matter to place separate subject area graphics on separate discs and
sub-divide the material into the relevant directories. This was OK when we
had just 8 then 15 floppy discs. It soon became increasingly difficult to
update and add new material without the whole process of cataloguing the
graphics becoming too unwieldy.
Therefore we anticipated that the CD-ROM format, with its vast storage
capacity, would be the answer, provided we had a friendly 'front-end'
application to search for graphics on the basis of key words or parts of key
words. All the graphics from the Graphics Libraries in their various formats
e.g. text-to-path, sprites, DXF etc. plus brand-new graphics, programs,
applications, Vector Libraries, !Draw Practical Guides and interfacing data
are collected together on the CD-ROM.
We are confident that our front-end provides the means to access,
cross-reference and display any file from 9000 in access times typically
less than 10s, provided you know part or all of the subject word for which
you are looking. This resource will make the task of putting together
multi-media presentations much easier as disparate graphics, applications,
data and programs are drawn together. e.g. a search for "ECG" will bring up
drawings and sprites of the heart, an explanation of the PQRST waveform, a
biological amplifier, ECG screen colour-corrected for black and white
printing, ECG interfacing apparatus set-up and finally real interfacing data
derived from that apparatus. See also answer 5.
3. Right from the start, when the Graphics Libraries were first thought of,
it was anticipated that all 'real' apparatus should be drawn on a set grid
to a set scale. It was a source of annoyance then and still is nownow when
we see graphics obviously drawn from different sources which are
incompatible in terms of scale, line thickness and impossible to edit or
customise. Therefore when you bring any pieces of SSERC apparatus graphics
on to Draw or Vector set to a 1 mm grid (shown or not) you know that they
will look correct in relation to each other and can be edited without losing
your verticals & horizontals! - no more test-tubes looking like buckets,
tubing like hose-pipes etc. What price professional time saved in creating
apparatus set-ups, worksheets and examinations with the minimum of fuss and
the maximum of clarity for the teacher, and more importantly, the pupil?
Electronics, architectural lighting and pneumatics diagrams for circuits and
prototyping were placed on a 1/10th inch grid because of the traditions in
that area.
4. The staff at SSERC are professional scientists and technologists and use
the information technology within the Centre to the full. The Graphics
Collections CD-ROM has become an essential part of increasing the
efficiency of what we do. It will provide both the test-bed and launch-pad
for similar projects in the future which maximise the use of this
technology. We understand the requirements of teachers and technicians
through answering questions over the phone and by fax or in meeting them
face-to-face during staff development days.
5. Many of the graphics and CD-ROMs you see around at present are ex-Mac,
ex-PC and ex-USA material. Nothing wrong with that. It does get irritating
though when the language is colored with references which don't get off the
first-base of applicability in Britain, so-to-speak! Another inconvenience
and sometimes a downright impracticality is the size of some of the files.
If you are doing a compilation diagram your application soon runs out of
memory. Try editing a supposed Drawfile which has been converted from a
sprite or scanned-in image and it seems to take 3 years to display the
multitude of blue-square control points, none of which are any good for
editing anyway! The Drawfile of the skeleton in the BodyBits directory of
Biology is only 66K. This is because the bones were 'hand-drawn' using the
the minimum number of control points but with the maximum use of the Bezier
curves to retain curvature detail where necessary. This principle is applied
to most of the graphics to be found on the Graphics Collections CD-ROM.
6. See answer 1.
7. See answers 1. and 4.
8. The Graphics Libraries are already widely used in over 1000 schools,
colleges and universities throughout the U.K. and as far afield as Norway,
Sweden, Luxembourg, Singapore, Holland, Belgium, Germany, Austria, Australia
and New Zealand. We aim to build on this success and provide teachers and
educational publishers with the best graphics with the minimum investment.
Remember the SSERC Graphics Collections CD-ROM represents a site-licence for
a school. Just work out how much senior professional time you could buy for
£99? All existing users of the Graphics Libraries are entitled to £3 off
the price for every disc previously purchased. Attractive discounts are also
offered to larger educational establishments, education authorities or
consortia of schools for multiple copies of the CD-ROM.
Remember that CD-ROM is a read-only medium and files present on the CD
cannot be edited and resaved. They can however be copied to floppy or hard
disc and edited there within the terms of the site licence. Remember also
that CD-ROM is slower than a hard disc. If there are graphics which you use
often then it may be convenient to store copies on your hard disc for quick
access times. Have fun!
Some statistics about the SSERC Graphics Collections CD-ROM
------------------------------------------------------------
average cost less than 1p per file
127 molecules each in up to 18 different
model representations programs to generate Drawfiles of gears, sprockets,
ratchets, tapped threads, washers, tubes, nuts, bolts etc. 38 multiple page
help/info files available for multi-tasking display when using
880 files of interfacing data derived from real experiments
28 Vector Libraries
interactive help available on search operations
upwards of 50000 key words
indexing data alone is almost 1Mb
4 years of graphics work at SSERC
330 Mb in total
1045 files compatible with Worracadgraphics/applications.