How we use astrophysics to study earthbound problems
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0:01 - 0:04I am an astrophysicist.
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0:04 - 0:07I research stellar explosions
across the universe. -
0:08 - 0:09But I have a flaw:
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0:09 - 0:12I'm restless, and I get bored easily.
-
0:12 - 0:16And although as an astrophysicist,
I have the incredible opportunity -
0:16 - 0:18to study the entire universe,
-
0:18 - 0:21the thought of doing
only that, always that, -
0:21 - 0:23makes me feel caged and limited.
-
0:25 - 0:29What if my issues with
keeping attention and getting bored -
0:29 - 0:30were not a flaw, though?
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0:30 - 0:33What if I could turn them into an asset?
-
0:34 - 0:36An astrophysicist cannot
touch or interact with -
0:36 - 0:38the things that she studies.
-
0:38 - 0:42No way to explode a star in a lab
to figure out why or how it blew up. -
0:42 - 0:45Just pictures and movies of the sky.
-
0:45 - 0:48Everything we know about the universe,
-
0:48 - 0:51from the big bang
that originated space and time, -
0:51 - 0:53to the formation and evolution
of stars and galaxies, -
0:54 - 0:56to the structure of our own solar system,
-
0:56 - 0:59we figured out studying images of the sky.
-
1:00 - 1:04And to study a system
as complex as the entire universe, -
1:04 - 1:09astrophysicists are experts
at extracting simple models and solutions -
1:09 - 1:11from large and complex data sets.
-
1:12 - 1:14So what else can I do with this expertise?
-
1:16 - 1:20What if we turned the camera
around towards us? -
1:21 - 1:24At the Urban Observatory,
that is exactly what we are doing. -
1:24 - 1:27Greg Dobler, also an astrophysicist
-
1:27 - 1:28and my husband,
-
1:28 - 1:32created the first urban observatory
in New York University in 2013, -
1:32 - 1:33and I joined in 2015.
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1:34 - 1:36Here are some of the things that we do.
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1:36 - 1:38We take pictures of the city at night
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1:38 - 1:41and study city lights like stars.
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1:42 - 1:44By studying how light changes over time
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1:44 - 1:46and the color of astronomical lights,
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1:46 - 1:48I gain insight about the nature
of exploding stars. -
1:49 - 1:51By studying city lights the same way,
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1:51 - 1:56we can measure and predict how much energy
the city needs and consumes -
1:56 - 1:58and help build a resilient grid
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1:58 - 2:01that will support the needs
of growing urban environments. -
2:02 - 2:06In daytime images,
we capture plumes of pollution. -
2:06 - 2:10Seventy-five percent
of greenhouse gases in New York City -
2:10 - 2:13come from a building like this one,
burning oil for heat. -
2:14 - 2:17You can measure pollution
with air quality sensors. -
2:17 - 2:21But imagine putting a sensor
on each New York City building, -
2:21 - 2:23reading in data from a million monitors.
-
2:23 - 2:25Imagine the cost.
-
2:26 - 2:29With a team of NYU students,
we built a mathematical model, -
2:30 - 2:33a neural network that can detect
and track these plumes -
2:33 - 2:35over the New York City skyline.
-
2:35 - 2:36We can classify them --
-
2:36 - 2:39harmless steam plumes,
white and evanescent; -
2:39 - 2:43polluting smokestacks,
dark and persistent -- -
2:43 - 2:46and provide policy makers
with a map of neighborhood pollution. -
2:48 - 2:52This cross-disciplinary project
created transformational solutions. -
2:54 - 2:57But the data analysis methodologies
we use in astrophysics -
2:57 - 2:59can be applied to all sorts of data,
-
2:59 - 3:00not just images.
-
3:00 - 3:03We were asked to help
a California district attorney -
3:03 - 3:06understand prosecutorial delays
in their jurisdiction. -
3:07 - 3:10There are people on probation
or sitting in jail, -
3:10 - 3:12awaiting for trial sometimes for years.
-
3:12 - 3:15They wanted to know
what kind of cases dragged on, -
3:15 - 3:18and they had a massive data set
to explore to understand it, -
3:18 - 3:19but didn't have the expertise
-
3:19 - 3:22or the instruments
in their office to do so. -
3:22 - 3:24And that's where we came in.
-
3:24 - 3:27I worked with my colleague,
public policy professor Angela Hawken, -
3:27 - 3:30and our team first created
a visual dashboard -
3:30 - 3:34for DAs to see and better understand
the prosecution process. -
3:35 - 3:38But also, we ourselves
analyzed their data, -
3:38 - 3:40looking to see if the duration
of the process -
3:40 - 3:44suffered from social inequalities
in their jurisdiction. -
3:44 - 3:46We did so using methods
-
3:46 - 3:49that I would use to classify
thousands of stellar explosions, -
3:49 - 3:52applied to thousands of court cases.
-
3:52 - 3:53And in doing so,
-
3:53 - 3:56we built a model that can be applied
to other jurisdictions -
3:56 - 3:58who are willing to explore their biases.
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3:58 - 4:01These collaborations between
domain experts and astrophysicists -
4:01 - 4:03created transformational solutions
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4:03 - 4:06to help improve people's quality of life.
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4:07 - 4:09But it is a two-way road.
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4:09 - 4:11I bring my astrophysics background
to urban science, -
4:12 - 4:15and I bring what I learn in urban science
back to astrophysics. -
4:16 - 4:18Light echoes:
-
4:18 - 4:23the reflections of stellar explosions
onto interstellar dust. -
4:24 - 4:30In our images, these reflections appear
as white, evanescent, moving features, -
4:30 - 4:31just like plumes.
-
4:31 - 4:35I am adapting the same models
that detect plumes in city images -
4:35 - 4:38to detect light echoes
in images of the sky. -
4:40 - 4:44By exploring the things
that interest and excite me, -
4:44 - 4:45reaching outside of my domain,
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4:45 - 4:48I did turn my restlessness into an asset.
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4:49 - 4:54We, you, all have a unique perspective
that can generate new insight -
4:54 - 4:58and lead to new, unexpected,
transformational solutions. -
4:59 - 5:00Thank you.
-
5:00 - 5:04(Applause)
- Title:
- How we use astrophysics to study earthbound problems
- Speaker:
- Federica Bianco
- Description:
-
To study a system as complex as the entire universe, astrophysicists need to be experts at extracting simple solutions from large data sets. What else could they do with this expertise? In an interdisciplinary talk, TED Fellow and astrophysicist Federica Bianco explains how she uses astrophysical data analysis to solve urban and social problems -- as well as stellar mysteries.
- Video Language:
- English
- Team:
- closed TED
- Project:
- TEDTalks
- Duration:
- 05:17
Brian Greene edited English subtitles for How we use astrophysics to study earthbound problems | ||
Brian Greene edited English subtitles for How we use astrophysics to study earthbound problems | ||
Brian Greene edited English subtitles for How we use astrophysics to study earthbound problems | ||
Oliver Friedman approved English subtitles for How we use astrophysics to study earthbound problems | ||
Oliver Friedman edited English subtitles for How we use astrophysics to study earthbound problems | ||
Camille Martínez accepted English subtitles for How we use astrophysics to study earthbound problems | ||
Camille Martínez edited English subtitles for How we use astrophysics to study earthbound problems | ||
Camille Martínez edited English subtitles for How we use astrophysics to study earthbound problems |