FROM BALTIMORE TO THE -...
Transcript of FROM BALTIMORE TO THE -...
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Tamas Budavari / Applied Math & Stats, JHU
FROM BALTIMORE TO THE STARS WITH DATA
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Breaking the Divestment Cycle: Predicting Abandonment & Fostering Neighborhood Revitalization in BaltimoreTamás BudaváriApplied Mathematics & Statistics – The Johns Hopkins University
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Baltimore overview• Baltimore has lost 1/3 of its population since 1950• Today, we have 16,500 boarded up vacant buildings• Of these, 13,000 are in distressed markets
M. Braverman
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Boarded up vacants
M. Braverman
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data science
flexible data platform
predictive modeling & optimization
1data fusion
geometry + historyhighly extensible
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social science
modeling transition
estimating externalities
evaluating policy
2
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social science
modeling transition
estimating externalities
evaluating policy
2
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government
rapid response queries
assisting with strategic investments
mapping “unoccupancy”
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Data in Baltimore OpenBaltimore
Hundreds of public datasets online http://data.baltimorecity.gov
Plus more administrative data
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DHCD’s Data Infrastructure Dept. of Housing & Community Dev
Study changes over time Support decision making
Statistics to help? Inference & prediction
M. BravermanJ. D. Evans
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Jim Gray’s 20 Questions Data-driven studies
Low-level questionsWhat we see
High-level questions Help hone policy making Interventions
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Built a Unique Solution Database of Baltimore City
Geospatial info for all parcels Time history of real properties
Easily extendable On the IDIES’s Data-Scope Novel indexing for fast links
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Mapping Vacancy2010 2015
Phil Garboden
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Mapping Vacancy2010 2015
Phil Garboden
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Clustering of Vacancy Probability of finding a
vacant next to another
Quantitative comparison Over time Across town
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Similar Neighborhoods Similarity graphs & eigenmaps
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What is a Neighborhood? Are neighborhood boundaries meaningful? Better grouping of houses?
Trends on a finer scale
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Collapsed Vacants
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Collapsed Vacant Ends of contiguous blocks of rowhomes
Alleys, gaps and demos break rows Need “sub-blockface” analysis
Time-dependent
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Neighborhood Revitalization Modeling urban transitions
What factors catalyzereinvestment?
Disinvestment? Innovative use of data
New sources of information Zillow? Cell phone usage?
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Neighborhood Revitalization Modeling urban transitions
What factors catalyzereinvestment?
Disinvestment? Innovative use of data
New sources of information Zillow? Cell phone usage?
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Strategic Investments Governor’s budget
Unprecedented $75M City scheduling
Spring 2016 JHU map of targets!
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Strategic Investments Combinatorial Optimization
Improve some objective, e.g.,or
Within a limited budget
Best objective? How to solve?
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Optimize the Impact Different objectives
Same budget
Advanced tools For decision makers
Lenny FanAmitabh BasuPhil Garboden
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Price Longitudinal data Environment Prediction Machine
Learning
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Ambitious Next Steps
Ben Seigel (21CC)Katalin SzlaveczBen ZaitchikKeeve NachmanKatie O’Meara (MICA)
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Spatiotemporal Multi-Level Modeling Hierarchical Bayesian statistics Include all aggregated data Joint inference for the
Individual houses and Ensemble distributions
Mengyang Gu
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Predicting Unoccupancy Time-series data
Water usage BG&E usage USPS
Proxy for occupancy
Phil GarbodenHana Clemens
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Satellite View Missing roof? Blue tarp = holes?
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Looking up! Astronomy images Blurred exposures
We solve for it For high-res details
Image behind the Atmosphere
Coadded Image
Matthias LeeCharlie GulianRick White
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Looking up! Astronomy images Blurred exposures
We solve for it For high-res details
Image behind the Atmosphere
Coadded Image
Matthias LeeCharlie GulianRick White
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Image behind the Atmosphere Looking up!
Astronomy images Blurred exposures
We solve for it For high-res details
Deconvolved Image
Matthias LeeCharlie GulianRick White
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Image behind the Atmosphere Looking up!
Astronomy images Blurred exposures
We solve for it For high-res details
Hubble Image
Matthias LeeCharlie GulianRick White
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Differential Chromatic Refraction Even colors!
Matthias LeeAndy ConnollyCharlie Gulian
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Differential Chromatic Refraction Even colors!
Matthias LeeAndy ConnollyCharlie Gulian
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At the Heart… Applied Math & Stats
Data mining Statistical modeling Machine learning Optimization Bayesian inference
Data-Intensive Science Hardware platforms Software solutions Streaming algorithms Database technologies GIS tools & indexing
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Limitations of Machine Learning Many methods to choose from
And more knobs to tweak Latching on known features
Manual intervention to refine What’s left in the data?
Missing the Human in the Loop!
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Use the Brain’s Detection Power
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Rapid Serial Visual Presentation Current state-of-the-art is binary classification
Target / Distractor We look for the interesting
Dynamic behavior of brain: looking for new
Nick Carey
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Human-Machine Co-Learning
Hide wireframe of 3D cube in high-D Looks like noise Random projections
Nick Carey
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Human-Machine Co-Learning
Hide wireframe of 3D cube in high-D Looks like noise Random projections Trigger to explore locally
Nick Carey
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Human-Machine Co-Learning
Hide wireframe of 3D cube in high-D Looks like noise Random projections Trigger to explore locally Converge on better view
Nick Carey
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Human-Machine Co-Learning
Hide wireframe of 3D cube in high-D Looks like noise Random projections Trigger to explore locally Converge on better viewSubconscious Navigation!
Nick Carey
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Human-Machine Co-Learning
Hide wireframe of 3D cube in high-D Looks like noise Random projections Trigger to explore locally Converge on better viewSubconscious Navigation!
Nick Carey
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Summary
Promising first steps With direct applications already deployed
Common data infrastructure & approaches Surprisingly similar, e.g., across astro/city
Ambitious future plans Need help! And need more data…
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