The AssertionEvidence Approach Michael Alley College of Engineering Pennsylvania State University Alley 2013 Slides influence the preparation delivery and understanding of a scientific presentation ID: 601913
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Slide1
Rethinking Scientific Presentations:The Assertion-Evidence Approach
Michael AlleyCollege of EngineeringPennsylvania State University
[Alley, 2013]Slide2
Slides
influence the preparation, delivery, and understanding of a scientific presentation
[Alley, 2013]Slide3
[estevejobs.com]
A key assumption is that
slides are needed
for that part of the presentation
[Alley, 2013]Slide4
A common error in the beginning of scientific talks
is to leave the audience behind
[Alley, 2013]Slide5
Determining Whether Atmospheric Mercury Goes
into Surface Snow after a Depletion Event
Katrine Aspmo
Torunn Berg
Norwegian Institute for
Air Research
Grethe Wibetoe
University of Oslo,
Dept. of Chemistry
June 16, 2004
Event
Ny-Ålesund
[Alley, 2013]Slide6
A common error in the mapping of scientific talks
is to show a list that is not memorable
[Alley, 2013]Slide7
This talk traces what happens to mercury after it depletes from the atmosphere in arctic regions
Environmental implications
Measurements from Station
Theory for mercury cycling Slide8
Another assumption is that
the slides we project should differ from our handout
≠
[Alley, 2013]Slide9
PowerPoint’s
defaults arose before much research on slidesand have not changed significantly
1987
2003
2007
[Gomes 2007]
[Alley, 2013]Slide10
PowerPoint’s defaults run counter to how people learn
Does not filter noise
Leads to too
many words
Consumes valuable
space
[Garner et al., 2009]Slide11
The assertion
–evidence structure consists of a message headline supported by visual evidence[Settles, 2002]
[Alley, 2013]Slide12
scent
source
The way a dog sniffs does not contaminate the vapor stream from the scent source
[Settles et al., 2002]Slide13
scent
sourceThe way a dog sniffs does not contaminate the vapor stream from the scent source
[Settles et al., 2002]Slide14
The first step is to write a sentence headline that states
the main message of the slidesentenceheadlineSlide15
A succession of electron acceptors occurs when an aquifer becomes contaminated with oil
CH
4
SO
4
2−
Fe
3+
NO
3
Mn
−
4+
O
2
–
–
–
Oil
Flow
[Alley, 2013]Slide16
A data acquisition system changes the form of the data
A digital acquisition system has to sample at a rate
fast enough to retain the shape of the analog signal
Analog-to-Digital
Converter
Measurement
Device
[Alley, 2013]Slide17
A digital acquisition system has to sample at a rate
fast enough to retain the shape of the analog signal
Analog-to-Digital
Converter
Measurement
Device Slide18
The second step is to find or create visual evidence
that supports the sentence headlinevisual
evidence
[Alley, 2013]Slide19
Most streams were classified in fair condition
because of high chloride concentrations
Delaware River Parks:79% FairChloride caused most problems
Western Pennsylvania Parks:
75% Fair
Chloride caused most problems
West Virginia Parks:
48% Fair
Sulfate caused most problemSlide20
Since its construction in 1952, traffic across the bridge
has grown exponentially19521.1 million vehicles
[Maryland Transportation Authority, 2007]Slide21
Since its construction in 1952, traffic across the bridge
has grown exponentially19611.5 million
1952
1.1 million
[Maryland Transportation Authority, 2007]Slide22
Since its construction in 1952, traffic across the bridgehas grown exponentially
19611.5 million
[Maryland Transportation Authority, 2007]
1952
1.1 million
2007
27 MillionSlide23
Normalized friction factors and Nusselt
numbers correlated our data with the data of others
Reynolds Number
Nu
o
, f
o
T
wall
T
inlet
Heat Flux, q˝
h
Nu
T
bulk
Pressure Drop
Friction Factor, f
Pressure Taps
Thermocouples
Venturi Meter
VoltmeterSlide24
At typical highway speeds, overcoming drag requires about two-thirds of a truck engine’s output[
McCallen, 2004]
Aerodynamic Drag
C
D
= 0.6
Rolling Friction
and AccessoriesSlide25
≠
Another assumption is that the slides that we project are for our
audience
, rather than for
usSlide26
The third step in creating assertion-evidence slides
is to change the defaults of PowerPointSlide27
Before:
Tsunamis cause devastating destruction, especially to sparsely vegetated areas.2004 Indian Ocean Tsunami: Gleebruk Village, Sri Lanka
After:
http://homepage.mac.com/demark/tsunami/14.html
PPT’s defaults
crowd this slideSlide28
2004 Indian Ocean Tsunami: Gleebruk Village, Sri Lanka
BeforeTsunamis cause devastating destruction, especially to sparsely vegetated areas
After
[homepage.mac.com/demark/]
Sparse
Sparse
SparseSlide29
A common error in the endings of scientific talks
is to waste the last slide
[Alley, 2013]Slide30
Adsorbed HOAc allows
the growth of sideriteA thick siderite layer protects the steel from corrosion
Questions?
In summary, high concentrations of acetic acid
help protect steel from corrosion
Steel
Fe
3+x
O
4-y
FeCO
3Slide31
Many engineers and scientists have had successusing the assertion-evidence approach
writing.engr.psu.edu/speaking.html