Death by PowerPoint - Wireless Innovation...
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Transcript of Death by PowerPoint - Wireless Innovation...
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
1( ) ( ) : ( ) ( )N Nj nk j nk
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 )
( ) ( )
( , ) ( , )
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
F k k f n n w
w w w w
−
=
− −+ +
= =
== − = −
=
=
=
∑
∑ ∑
2 1 1 1 2
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
1 21 1 2 2
1 21 2
( ) ( ) ( ) ( )
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
n k n knkN N N
N Nn k n kN N
n n
w
w w w w w
w w w
F k k f n n w w
=
− −
= =
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= =
=
=
= ∑ ∑
A (k)
B (k)
N
N
N
NN
2
22
H (k)
H (k+ )-
e -j 2πN k
Cooley-Tukey and Good-Thomas Fast Fourier Transforms
−
=
− −+ +
= =
=
=
=
=
=
=
∑
∑ ∑
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
( ) ( )
( , ) ( , )
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!