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How to Use the Module
This section contains a brief overview of how to use the module.
Navigation Bars
To help guide you through the module, navigation bars are placed at
the top of many of the pages in the module. There is one at the top
of this page. (They are also included at the bottom of some longer
pages so you don't have to return to the top.) Four graphical buttons
marked "Next", "Up", "Previous", and "Index" provide links as does the
line of text underneath them. "Next" and "Previous" move you to the
next and previous logical page in the module if there is one. (Some
pages do not have these, as there may not be a page that must come
before or after that page.)
The "Up" link moves you up one logical
stage in the hierarchy of the module. For example, right now you are
in the section explaining the module, which you got to from the main
page of the module. Therefore, the "Up" link will return you to the
main page of the module.
The "Index" link takes you to an index for the entire module. The
index has a listing for every page in the Lake pollution module. It
is not a good place to start the module from, but it is helpful if you
want to get someplace you have been before quickly.
Since this module is on the World Wide Web, your web browser will
provide you with some simple navigation aids. For example, you can
use the "Back" button on your browser to return to the last page you
came from. Therefore, you can always find your way back even if the
page you are on does not have a "Previous" link in the navigation bar.
We also suggest using bookmarks to mark where you left off in a lesson
or exercise if you need to stop for a while. This keeps you from
having to start from the beginning each time.
From time to time, you will see some text in a passage hilighted
like this text. This hilighted text is a
hyperlink, usually to more information about the text. For example,
if you ran across a reference in this module to an
impulse input function,
it will be hilighted just as it is here. The link goes to a page with
detailed information about the
impulse input function.
When you are done, you must use the "Back" button on your browser to
return, because of course you could have come to this page from
anywhere in the module that an
impulse input function
is mentioned, so there is no navigation bar on this explanatory page.
[See "Using Your Browser" above.]
Using the Applets
This module includes several applets on the web pages. In order for
these to work, your browser must support Java(tm). Explanation on how
to use each applet is
included where it is used. The heart of the module in fact is the
lake simulator applet, which allows you to simulate lake pollution
scenarios using the mathematical models we develop in this module.
Next: Help
Up: Beginning
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John Hoggard <hoggard@math.vt.edu>
Last modified: Sun Aug 24 15:21:10 EDT 1997