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World Wide Web News

Monday, January 23, 1995

an irregular gathering of web stuff by...
/ Alan Levine / Maricopa Center for Learning and Instruction /


In this issue...

Community College Home Page

The MCLI Web server is building a list of resources and pointers to community colleges. Look for it at:
	http://www.mcli.dist.maricopa.edu/cc/

If you know of any others, please let me know.

Around the Maricopa Webs

The Chandler-Gilbert home page has been re-organized by Kurt Leinbach offering information about the Learning Resource Center, the 1995 Spring schedule, a calendar of events, and Instructional Computing Committee bulletins.

From Phoenix College, Jim Hughes has designed a home page with photos from campus as well as a clickable campus map. Jim Walters has assembled information about Marimuse and their successful work with Longview Elementary School.

The Glendale Web server has a student information system as well as network services archives.

Estrella Mountain's Web server is home of the Internet Tryptiks, guides to Internet information in several academic areas.

The Maricopa District Web now has a page on the Apollo project as well as links to the library systems.

Paradise Valley, South Mountain, and Scottsdale are in the process of building and testing Web servers.


Local Net Providers

In a previous issue we mentioned that PrimeNet, a Phoenix Internet access provider had announced a WWW home page. Here are some more URLs for local companies that provide dial-in TCP/IP (so you can use graphicl wbe browsers) access to the Internet:

Those Shimmering GIF Images

Have you noticed how from some sites, when an image downloads to your screen, it appears quickly but "jagged" and then comes into focus? Or it appears gradually as "Venetian blinds" that fill in with detail as the image data arrives?

Here are some URLS from the MCLI Web server that use this effect:

This effect is part of an option in the GIF file format, called "interlacing". It orginally was incorporated in the days when 1200 baud was a fast modem (!). CompuServe started transmitting graphics so that the rough outline of the image would appear first so that a user would know it was loading, and then fill in with the detail as the remainder of the image was transmitted.

In a non-intertaced GIF image the lines of pixel data of the image is stored linearly from the top to the bottom. When interlaced, the data is written as every eighth scan line, then every fourth between them, and then every remaining line. So when downloading, the image first appears rough and jagged, and as more detailed data arives, the picture appears to sharpen.

For those that maintain Web servers, here is what can use to convert your graphics to interlaced GIF files (thanks to Kurt Leinbach, CGCC for pointing this out). Use one of the shareware programs listed below to open your image file. Select Save from the File menu, and look for a button labeled Options. Click on the option for interlaced and then save the file.

Here are two shareware programs for working with GIF files and their locations on the MCLI Public file server:

Macintosh: GIF Converter
Things For The Macinstosh/ShareWare/GIFConverter237.sea

Windows: WinGIF
Things for the IBM/Software for Windows/wingif14.zip

QuickTime from a Web Server

QuickTime movies can be distributed from any WWW server as long as they have been "flattened". The Macintosh format of QuickTime stores the data for QuickTime movies in separate structures known as the "data fork" and the "resource fork". On other platforms, the resource fork is not recognized, so the movie information must be "flatten" down to just the "data".

This is can be done on the Macintosh computer using a QuickTime editing program such as Adobe Premiere, as an option for saving for "non-Macintosh" format. This is typically a step one needs to play QuickTime in Windows. However, it may also be done with one of several QuickTime player applications. One example is a free program called FastPlayer. Here are the easy steps:

  1. Launch FastPlayer
  2. Select "Open" from the "File" menu and select your QuickTime movie
  3. Select "Export Flattened Movie" from the "File" menu
  4. Give the new movie a name (for WWW purposes, choose a name that ends with ".mov" or ".qt") and save it

FastPlayer may be found on the MCLI Public file server:

   Things For the Macintosh/Freeware/FastPlayer11.sea
   
Note that on a Windows machine requires QuickTime for Windows (QTfW) to play QuickTime movies.

To view some QuickTime movies via the Web, see the MCLI QuickTime page.


More NetScape HTML Enhancements

In the last issue we listed "extra" HTML tags recognized by the NetScape browser. Here is a quote from NetScape about these extensions:
"These are proposed extensions to the soon to be released HTML 2.0 specification. Netscape Communications will be working with the appropriate standards bodies, including W3O, and the authors of other WWW browsers in an attempt to have these extensions available in all browsers in the near future. All the Netscape Navigator extensions to HTML take the form of additional tags and attributes added to the HTML specification and are specifically designed not to break existing WWW browsers."

The complete list of NetScape HTML enhancements is available from NetScape Communications.

Ordered Lists

An "ordered" list <ol>.....</ol> normally displays a list with the list items <li> numbered with arabic numerals (1., 2., 3.). NetScape offers these options for number style:
   Type          HTML               Examples
------------------------------------------------------
Roman Big   <ol TYPE=I>...</ol>   I.   II.    III.   IV.
Roman Small <ol TYPE=I>...</ol>   i.   ii.    iii.   iv.
Alpha Big   <ol TYPE=A>...</ol>   A.   B.     C.     D.
Alpha Small <ol TYPE=a>...</ol>   a.   b.     b.     d.

You can also add a START= tag so that the numbering starts at some other value. For example:

     <ol TYPE=A START=4>
     <li>  is for Dog
     <li>  is for Elephant
     <li>  is for Frog
     </ol>

would result in the following:
     D.  is for Dog
     E.  is for Elephant
     F.  is for Frog

Special Characters

The present HTML standards allow for display of special characters (the ISO Latin-1 character set) for accent marks, etc. NetScape adds two more:
   ®   Registered Trademark 
   ©  Copyright  

Floating Inline Images

A "floating" image is one where the text flows around the side of a graphic. This effect is achieved by adding the tag ALGIN=left or ALIGN=right within the <IMG> tag. The value of the ALIGN tage determines which side of the page to place a GIF image, and subsequent text fills the adjacent area. I've recently added this to my home page, so that some of the text fills the column adjacent to the (goofy) picture of myself:

The <IMG> tag contains many enhancemnents best explained from the NetScape documentation.

If you are using some of the NetScape-special HTML tags, be sure to test your pages with other browsers to make sure the page is still readable. The following tips for centering text is claimed to work for all WWW browsers:

If it is a <h#> headler, try

     <h1 align=center>Center me!</h1>

It will come out like this:
                                  CENTER ME!

If it is other text, or a picture, try
    <p align=center>Here is some text to be centered</p>
    Here is some centered text <p align=center> [IMAGE] </p>
    

Sites of Intrigue


WWW News 01-23-95
Maricopa Center for Learning and Instruction (MCLI)
Maricopa County Community College District

The Internet Connection (1993-2006) at MCLI was Alan Levine --}
Comments once went to levine@maricopa.edu (no one is at home there)