![]() ![]() Indeed, that analogy is used in "The Cognitive Style of PowerPoint" in order to break out of the temporal sequencing of PP and to increase spatial resolution.Įven in the days of slide projectors, I combined xeroxed handouts with projected color images. ![]() To scan a 35mm slide (film) for high-quality printing reproduction at enlarged sizes requires from 5 to 30mb at its best, the 35mm film slide has a lot of high-resolution information, now just being approached by high-end digital cameras.Ī great virtue of carousel slides was the ability to use dual slide projectors, which provided high-resolution spatial comparisons. I posted my comments from that thread here if anyone is interested in hearing more: While the issue discussed in the linkrot thread is a bit different, the discussion applies here. My thought was that the academic world needs its very own Gnutella network with a layer of secure author control over file versioning. The validity of an original document is called into question, when documents on computers are easily copied, modified, shared and even lost. This same issue came up in the linkrot thread. However, with a pure digital format we can start do do some interesting meta data checking on files as they are shared. The integrity of an analog 35mm slide cannot be validated with any more authority than a digital image. Most copy houses can print digital files (even powerpoint foils!) to 35mm slides for $5 a slide. Unfortunately, technology makes even the analog slide projector open to potential misuse. It is interesting the first response should come down to image integrity. ![]() One has to wonder whether physicists and mathematicians would ever give up their beloved overhead projectors for digital technology. I have not been to a meeting for five years it is possible, even likely, that digital projection is replacing analogue images there. Surely there are tens of thousands of serviceable Carousels at work today, and they won't be soon junked, especially as long as the weakest digital projector retails for five times the price of a Carousel.įor many years, dual Carousels and twin projection screens have been a hallmark of sessions at the Geological Society of America. Combining the seven years of service and support with a long history of trouble-free operation, means that slide projectors will continue to enjoy many years of productive use." "Slide projectors continue to be used in many government applications due to a proven track record of cost-effective, reliable, high-quality image projection. Although the notice I received did not say so, it seems likely that the use of digital projectors and Powerpoint, especially in business and industry, is to blame for this. I have just received, through an e-mail discussion list for archeologists, news that Kodak will discontinue production of the Carousel projector in 2004. ![]()
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