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Tag: slides

Is a university lecture or job talk going on FAR longer than it is supposed to? Emphasize punctuality with this new incredible heat-lamp-based presentation setup!

The issue:

Sometimes, a college lecture or work presentation goes far over the allotted time (Figure 1).

Frequently, the presenter doesn’t even realize that they are over time.

 

One simple way to prevent a presentation from going over time would be to just have the power outlets turn off at exactly the designated end-of-presentation time.

However, this hard stop could be annoying: what we really want is something that will make the presenter inherently want to wrap up their talk.

Proposal:

The solution is simple: just have an array of heat lamps pointed directly at the presentation podium.

When the time limit has expired, the heat lamps turn on, one at a time. At first, the podium will be just a little warm, but it will quickly become scorching and unbearable. Thus, the presenter is encouraged to conclude their talk in a timely fashion.

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Fig. 2: The heat lamps above the presenter will gradually turn on when the presentation hits its time limit.

Conclusion:

An earlier shark-related proposal turned out to be too expensive, as it required creating a new auditorium with a raised platform above a shark tank. So this is an almost-as-effective solution for the university or business on a tight budget.

This heat lamp idea could be used in conjunction with an earlier software-only plan to “burn away” slides as they are shown. This “burning” idea would synergize well with the heat lamps, too!

PROS: Does not have the same recurring maintenance costs of the shark version of this idea in the link above.

CONS: May cause a circuit breaker to trip if the building is not wired for 6000+ watts on a single circuit.

When giving a slide presentation, show DIFFERENT slide decks to different groups in the audience! Never confuse your audience with an overly-technical presentation again. An amazing application of the same technology used in red-green-glasses-based 3D movies.

Background:

When giving a presentation to a diverse audience (e.g. of experts and non-experts, or of employees from two different departments in a company), you have a problem: you can only make one set of slides, but sometimes you might want to tailor different parts of the presentation to a different audience.

For example, one might want to give a presentation at an easily-understood overview level while also providing technical details for any domain experts in attendance.

Proposal:

Nearly all projectors and screens consist of three light-generating elements, in red (1), green (2), and blue (3).

By giving some members of the audience a pair of green-lens glasses (which block all red and blue light), we would be able to hide certain elements of the presentation that were not relevant to the green-glasses wearers. We can use a set of red-lens glasses and blue-lens glasses in the same way (see Figure 1).

With this technique, we can show up to three entirely different slide presentations, with the only limitation being that each presentation must consist of only monochromatic images.

Specifics:

  • Red glasses can see the following colors:  red, yellow, magenta, white [*].
  • Green glasses can see the following colors: green, yellow, cyan, white.
  • Blue glasses can see the following four colors: blue, magenta, cyan, white.

[*] Note that this is “additive” color space (where red + green = yellow), not the “subtractive” color space one might be familiar with from mixing paints.

Fig_1 3d_glasses_modified

Fig. 1: These glasses block certain wavelengths of light. By carefully constructing our slide decks, we can use these glasses to give up to three different presentations to the same audience at the same time.

So a slide that should be visible to everyone in the audience should be white (or shades of gray). Whereas if you only wanted to present to the red & green glasses-wearers (but not the blue ones), that text would be yellow. See Figure 2 for an example.

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Fig. 2: A sample presentation that is meant to provide both “optimistic” conclusions (green glasses) and “realistic” conclusions (red glasses). This is what the presentation looks like with no color-filtering glasses on.

 

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Fig. 3: The presentation from Figure 2 in “pessimistic / realistic” mode, as viewed through red lenses. All of the green text has disappeared!

 

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Fig. 4: The presentation from Figure 2 in “optimistic” mode, viewed through green lenses. Red text has disappeared.

 

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Fig. 5: Real-world demonstration: a color-enhanced version of what a red-blue version of this presentation looks like through red-blue “3D” glasses. The effect is almost 100% convincing for the human eye, but the camera actually manages to pick up a lot of the non-lens color, so this photo has been edited to more accurately reflect the perceived image.

A superior (but more logistically difficult) implementation:

It would also be possible to implement this same system with polarized glasses (as were used for some 3D TVs in the early-to-mid 2010s).

This would have the advantage of providing full color, but the disadvantage of not being compatible with a standard conference room projector. Additionally, you would be limited to two different presentations, rather than 3.

PROS: Improves your presentations by letting you tailor the presentation slides to multiple categories of audience members.

CONS: Greatly increases the amount of time required to make a presentation!