Death by PowerPoint

fred harris

Borrowed liberally fromLife after Death by PowerPointDon McMillanyou-tube

Most Common PowerPoint Mistakes

1. People tend to put every word they are going to say on the PowerPoint slide. Although this eliminates the need to memorize your talk, ultimately this makes your slides crowded, wordy and boring. You will lose your audience’s attention before you reach…

(Continued) the bottom of your first slide.

Most Common PowerPoint Mistakes

2. Many people do not run spell cheek before their presentation.BIG MISTAK!!! Nothing makes the speaker look stupidor that spelling errers.

Most Common PowerPoint Mistakes

• Avoid• Excessive• Bullet• Pointing.• Only• Bullet• Key• Points.• Too• Many

• Bullet• Points• And• Your• Key• Messages• Will• Not• Stand• Out.

• In Fact• The• Term• Bullet Point• Comes• From• People• Firing• Guns at• Annoying• Presenters

Bad Color Schemes• Clashing color schemes and font

colors can lead to• Distraction• Confusion• Headaches• Nausea• Vomiting• Lack of Bladder Control

Number of PowerPoint Slides versus Usefulness of Talk

Number of PowerPoint Slides in Presentation

Effe

ctiv

enes

s of

Pre

sent

atio

n

10 20 30 40 50 60 70 80 90100110

100%90%

80%70%

60%50%40%30%20%

This Presentation

Effectiveness Versus Data

Data Presented on PowerPoint Slides

Effe

ctiv

enes

s of

Pre

sent

atio

n

10 20 30 40 50 60

100%90%

80%70%

60%50%40%30%20%

Effectiveness Versus Data

Data Presented on PowerPoint Slides

Effe

ctiv

enes

s of

Pre

sent

atio

n

10 20 30 40 50 60

100%90%

80%70%

60%50%40%30%20%

Effectiveness Versus Data

Data Presented on PowerPoint Slides

Effe

ctiv

enes

s of

Pre

sent

atio

n

10 20 30 40 50 60

100%90%

80%70%

60%50%40%30%20%

Effectiveness Versus Data

Data Presented on PowerPoint Slides

Effe

ctiv

enes

s of

Pre

sent

atio

n

10 20 30 40 50 60

100%90%

80%70%

60%50%40%30%20%

Effectiveness Versus DataApple

Pear

PeachPlum

BananaApricot

Large

Large

Large

LargeLarge

Small

Small SmallSmall

Small

SmallMedium

Medium

Medium

Medium

Medium

Medium

Large

Effectiveness Versus DataApple

Pear

PeachPlum

BananaApricot

Large

Large

Large

LargeLarge

Small

Small SmallSmall

Small

SmallMedium

Medium

Medium

Medium

Medium

Medium

Large

Green Green Red Purple Yellow Apricot

Clarifying Detail ofFigure and Additional

Useful Information can Be Found in table

Below. More information canBe obtained from web site

moreboringstuff.com

Animation Versus Effectiveness

10 2020%30%40%50%

60%

70%80%

90%100%

30 40 50 60Data Presented on PowerPoint Slides

Effe

ctiv

enes

s of

Pre

sent

atio

n

Original Graph Reversed Graph

SimpleBut

Effective

ActiveBut

Confusing

Effective But

Boring

ActiveBut

Ineffective

DullBut

Static StupidBut

Amuzing

StrangeColoredHeart

UsefulAnd

Amuzing

BusyPointed

Box

DullPentagon Big

Square

SpinningStar

Good Advice• Don’t fill the screen with Equations• Don’t place more than a few items on screen• PowerPoint slides are cheap use another slide rather

than crowd the slide• Don’t use dark backgrounds and colored fonts.• View your slides on a projector. Colors and Contrast

Differ from that seen on a monitor.• Don’t make a sales presentation!• Make sure audience feel that they learned something

useful from presentation.• Put yourself in the audience’s position. Would they find

the presentation Interesting? Informative?

More Good Advice

• Inject some humor in presentation

• Use Lots of Pictures• Use Very Few Equations

Discrete FourierTransform

Good-ThomasTransform

Cooley-TukeyTransform

WinogradTransform

An OK Slide

2 21 1

0 0

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N N

n kH k h n e h n H k e

N

π π− −−

= =

= =∑ ∑FFT : IFFT

Find one or more faults in this Slide000

011

110

001

100

111

010

101

--

- -

-- -

-

- - -

-

w0

w0

w0

w2

w2

w2

w3

w1

1 21 2 2 2 1 1 1 2 2 2

1 21 2

1 1 2 2 2 2 2 1 1 1 1 2 2 1 2

1 22 2 1 1 1 1 2 2

1

01 1

( )( )1 2 1 2

0 0

(1 ) (1 )

( ) ( )

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Examine product in Exponent

NnkN

nN N

n M N n M N k N k NN N

n n

n k M N N n k M N N n k M N NnkN N N N

N N NM N M N M N M N

F k f n w

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w w w w

−

=

− −+ +

= =

== − = −

=

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=

∑

∑ ∑

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1 2

1 1 2 1 1 1 1 2 1 2 1 2 2 2 2 1

1 2 1 2

1 1 1 2

1 2

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( ) ( ) ( ) ( )

1 1

1 2 1 20 0

( , ) ( , )

n k M N NNN N N

n k N n k M N N n k N n k M N NnkN N N N N

N N N N N N

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n n

w

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=

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=

= ∑ ∑

A (k)

B (k)

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2

22

H (k)

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e -j 2πN k

Cooley-Tukey and Good-Thomas Fast Fourier Transforms

−

=

− −+ +

= =

=

=

=

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=

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∑

∑ ∑

1 21 2 1 1 2 2

1 21 2

1 1 1 2 2 2 1 1 2 2 1 2

1 2

1 1 1 2 2 11 2

1 11

1

01 1

( )( )1 2 1 2

0

2 1 2

0

1

( ) ( )

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Examine product in Expo

( , ) (

n t

)

en

,

NnkN

nN N

n n N k k NN N

n n

nk n k n k N n k N n k N NN N N N N

N N N

n k n k n kN

nN

N

k

N

NF k k f n n

F k f n w

w

F k k f n n w

w w w w w

w

w

w w

− −

= =

− −

= =

=

∑ ∑

∑ ∑

1 21 2 2 1

21 2

1 21 1 2 1 1 2

2 11 2

1 1

0 0

1 1

1 20 0

( , )

N Nn k n k

Nn n

N Nn k n k n kN N N

n n

w

w f n n w w

TranslatedWindowSpectra

SignalSpectra

Collec ted Spectra

Collec ted Noise Supressed

Spectra

NoiseSpectra

Interference Spectra

f

f

f

fSignal componentInterference componentNoise component

H(f)

S(f)

S(f)H(f)

G(f)

Here we can ClearlySee the Relationship

Between the Simplification of the Double sum

Due to the twiddle factor

Oops a clear space: we have to fill this with something

Oops Misseda spot.

Good luckAnd Happy Presenting!