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Computational Sustainability Carla P. Gomes Institute for Computational Sustainability Computing and Information Science Cornell University Support : Role of Information Sciences and Engineering in Sustainability Expeditions RISES in


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Computational Sustainability

Carla P. Gomes Institute for Computational Sustainability Computing and Information Science Cornell University

Role of Information Sciences and Engineering in Sustainability RISES DC, Feb. 2011

Expeditions in Computing (CISE) Support:

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The Institute for Computational Sustainability (ICS) Research Team

29 graduate students

24 undergrad. students

Expeditions in Computing (CISE) Support:

ICS members and collaborators for their many contributions towards the development of a vision for research, education, and outreach activities in the new area of Computational Sustainability

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Sustainability and Sustainable Development

The 1987 UN report, Our Common Future (Brundtland Report): !! Raised serious concerns about the State of the Planet. !! Introduced the notion of sustainability and sustainable development: Sustainable Development: development that meets the needs

  • f the present without compromising the ability of future

generations to meet their needs.

Gro Brundtland Norwegian Prime Minister Chair of WCED

UN World Commission on Environment and Development,1987.

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Follow-Up Reports: Intergovernmental Panel on Climate Change (IPCC 07) Global Environment Outlook Report (GEO 07)

[Nobel Prize with Gore 2007]

+130 countries Global Warming Erosion of Biodiversity

Examples:

  • !At the current rates of human destruction of natural

ecosystems, 50% of all species of life on earth will be extinct in 100 years.

  • !The biomass of fish is estimated to be 1/10 of what it

was 50 years ago and is declining. Worm et al. (2006)

There are no major issues raised in Our Common Future for which the foreseeable trends are favourable.

Wilson, E.O. The Future of Life (2002) .

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Safe Operating Boundaries: Crucial Biophysical Systems

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Source: Planetary Boundaries: A Safe Operating Space for Humanity, Nature, 2009

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Sustainability: Interlinked environment, economic, and social issues

Our Common Future recognized that environmental, economic and social issues are interlinked. "The economy only exists in the context of societies, and both society and economic activity are constrained by the earths natural systems. "A secure future depends upon the health of all 3 systems (environment, society, economy).

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Sustainable Development encompasses balancing environmental, economic, and societal needs.

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Challenging Sustainability Problems Complex Dynamical Systems

Sustainability problems are unique in scale, impact, complexity, and richness:

Often involving multiple and highly interconnected components and players, in highly dynamic and uncertain environments.

ecosystems.noaa.gov

Smart Grid: Complex Digital Ecosystem Natural Ecosystem

Offer challenges but also opportunities for the advancement of the state of the art in computing and information science.

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Computer scientists can — and should — play a key role in increasing the efficiency and effectiveness of the way we manage and allocate our natural resources, while enriching and transforming Computing and Information Science and related disciplines.

Computational Sustainability: Vision We need critical mass in the new field of Computational Sustainability!!!

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I Examples of Computational Sustainability problems highlighting research themes II Our research themes III Building a community in Computational Sustainability IV Conclusions Outline

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E.g. Conservation and Biodiversity

I Environment II Socio-Economic Systems

Sample of Computational Sustainability Problems

E.g. Poverty mapping and poverty reduction, and harvesting policies.

III Energy

E.g. Smart grid, Material discovery and Biofuels

Farmers Fuel distributors Environmental impact Consumers Energy crops Non-energy crops Social welfare Food supply Gasoline producers

Water quality

Soil quality

Local air pollution

Biodiversity Energy market

Economic impact

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Conservation and Biodiversity

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Combatting Biodiversity Loss: Landscape Connectivity

Ideas from circuit theory for mapping critical linkages in complex landscapes

Brad McRae et al.

Connectivity for mountain in southern California. Blue - low current density (low densities of dispersing mountain lions); Yellow - movement bottlenecks, where connectivity is most vulnerable to hab destruction. Red - high current flow high priority areas for conservation or restoration.

With limited funding and constant threats of habitat loss how do we choose

which habitats to protect so that landscapes will stay well-connected for wild animal species?

Maintaining movement and connectivity across landscapes can help reduce inbreeding, increase genetic diversity, and/or colonize new habitat.

Opportunities for new computational models integrating ecological and economic constraints.

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Wildlife Corridors link core biological areas, allowing animal movement between areas. Typically: low budgets to implement corridors.

Example:

Goal: preserve grizzly bear populations in the U.S. Northern Rockies by creating wildlife corridors connecting 3 reserves: Yellowstone National Park

Glacier Park / Northern Continental Divide Salmon-Selway Ecosystem

Combatting Habit Loss and Fragmentation: Wildlife Corridors

cost suitability

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Conservation and Biodiversity: Wildlife Corridors

Challenges in Constraint Reasoning and Optimization

Wildlife corridor design

Computational problem " Connection Sub-graph Problem Find a sub-graph of G that: contains the reserves; is fully connected; with cost below a given budget; and with maximum utility Connection Sub-Graph - NP-Hard Given a graph G with a set of reserves:

Connection Sub-graph Problem

Worst Case Result --- Real-world problems possess hidden structure that can be exploited allowing scaling up of solutions.

Conrad, Dilkina, Gomes, van Hoeve, Sabharwal, Sutter; 2007-2010

Interdisciplinary Research Project:

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Minimum Cost Corridor for the Connected Sub-Graph Problem !! !"#$%&'()*+)&,'"'!"#$%&'($)(*"#*+$,+**'-%$.*&/'' !! 0+1&2'34%4/&5&%'5%4654.*&'7'3$*8#$/+4*')/&',$*94.*&':$%';1&2'<,/4**=' #(/.&%'$:'5&%/+#4*,'$%'%&,&%9&,'<#$5'(,&2'+#'6$#,&%94)$#'*+5&%45(%&='

25 km2 hex 1288 Cells $7.3M 2 hrs 50x50 grid 167 Cells $1.3B <1 sec 40x40 grid 242 Cells $891M <1 sec 25x25 grid 570 Cells $449M <1 sec 10x10 grid 3299 Cells $99M 10 mins 25 km2 hex Extend with 2xB=$15M 10x in Util

What if we were allowed extra budget?

Need to solve problems large number of cells! ">64*4.+*+58'!,,(&,''

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Models Are Important!!!

Single Commodity Flow Directed Steiner Tree

Captures Better the Connectedness Structure #! Exponential Number of Constraints $! Provides good upper bounds (discover good cuts with ML)$! Quite compact (poly size)

Dilkina and Gomes 2010

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Science of Computation - Understanding Structure:

Typical Case Analysis and Identification of Critical Parameters

(Synthetic Instances)

How is hardness affected as the budget fraction is varied?

Problem evaluated on semi-structured graphs m x m lattice / grid graph with k terminals Inspired by the conservation corridors problem Place a terminal each on top-left and bottom-right Maximizes grid use Place remaining terminals randomly Assign uniform random costs and utilities from {0, 1, !, 10}

Utility Gap (Optimally Extended Min cost/ Optimal) Runtime From 6x6 to 10x10 grid (100 parcels): 1000 instances per data-point; Runtime for Optimal Solution

No reserves:

  • pure optimization
  • 3 reserves

3 reserves

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Scaling up Solutions by Exploiting Structure

  • !Synthetic generator / Typical Case Analysis
  • !Identification of Tractable Sub-problems
  • !Exploiting structure via Decomposition

Static/Dynamic Pruning

  • !Streamlining for Optimization
  • !New Encodings

5 km grid (12788 land parcels): minimum cost solution 5 km grid (12788 land parcels): +1% of min. cost

Glacier Park Yellowstone Salmon-Selway Real world instance: Corridor for grizzly bears in the Northern Rockies, connecting: Yellowstone Salmon-Selway Ecosystem Glacier Park (12788 nodes)

Our approach allows us to handle large problems and reduce corridor cost dramatically (hundreds of millions of dollars) compared to existing approaches while providing guarantees of optimality in terms of utility: Optimal or within 1% of optimality for interesting budget levels.

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Multiple Species

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Grizzly Bear Wolverines Lynx

Collaborators: Michael K. Schwartz USDA Forest Service, Rocky Mountain Research Station Claire Montgomery Oregon State University

Identification of new problems to address multiple species: E.g. Steiner Multigraph Problem Upgrading Shortest Path Problem Dynamics and Game Theory :

  • ! Study dynamics of interactions
  • ! How to be fair???
  • ! What metrics?
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Outreach and Education

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Pedagogical Games Shortest path, Steiner trees, and much more about Computational Sustainability Lots of undergrad/Meng students Having fun designing games for A Travel Museum on Computational Sustainability

Edutainment

  • Video Games for

middle school Boynton Middle School Math Day

Effort led by David Schneider

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Connectivity Problems: Other applications

!! What characterizes the connection between two individuals? The shortest path? Size of the connected component? A good connected subgraph? !! Which people have unexpected ties to any members of a list of other individuals?

[Faloutsos, McCurley, Tompkins 04] Network of Pandemic Influenza

Robert J. Glass,* Laura M. Glass,† Walter E. Beyeler,* and

  • H. Jason Min* 2006

Facebook Network If a person is infected with a disease, who else is likely to be?

Sensor Web as predicted by Matt Heavner at University of Alaska Southeast.

Sensor and Wireless Networks

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Bird Conservation

Information Sciences

  • D. Fink
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Red Cockaded Woodpecker (RCW) is a federally endangered species Current population is estimated to be about 1% of original stable population (~12,000 birds)

Conservation Funds manages Palmetto Peartree Preserve (North Carolina) 32 active RCW territories (as of Sept 2008)

Conservation and Biodiversity: Reserve Design for Bird Conservation

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Goal: Increase RCW population level Management options: Prioritizing land acquisition adjacent to current RCW populations Building artificial cavities Translocation of birds

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Computational Challenge: scaling up solutions for considering a large number of years (100+) " " decomposition methods and exploiting structure Red Cockaded W. Biological and Ecological Model Management Decisions: Land acquisition Artificial cavities Translocation of birds Must explicitly consider interactions between biological/ecological patterns and management decisions

Conservation and Biodiversity: Reserve Design for Bird Conservation

i j k pkj

pij

1-! t = 1 t = 2 t = 3

Stochastic diffusion model (movement and survival patterns) in RCW populations Stochastic optimization model Decisions: where and when to acquire land parcels Goal: Maximize expected number of surviving RCW

Maximizing the Spread of Cascades

Approaches: Sample Average Approximation Upper confidence Bounds

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Influencing Cascades in Networks: Other Examples Maximizing or Minimizing spread

!! Business Networks: Technology adoption among friends/peers. !! Social Networks:

Spread of rumor/news/articles on Facebook, Twitter, or among blogs/ websites.

Targeted-actions (e.g. marketing campaigns) can be chosen to maximize the spread of these phenomena.

Maximize the spread Minimize the spread

!! Epidemiology: Spread of disease

–! In human networks, or between networks of households, schools, major cities, etc. –! In agriculture settings.

!! Contamination: The spread of toxins / pollutants within water networks. !! Invasive species Mitigation strategies can be chosen to minimize the spread of such phenomena.

Viral Marketing

[Domingos and Richardson, KDD 2001]

[Kempe, Kleinberg, and Tardos, KDD 2003]

[Krause and Guestrin 2007]

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Additional Levels of Complexity: Large-Scale Data Modeling, Stochasticity, Uncertainty,

  • !

How to estimate species distributions and habitat suitability

  • !

Movements and migrations;

  • !

Understanding species interaction

  • !

Climate change

  • !

Stochasticity and Uncertainty

  • !

How to get the data?

  • !

Other factors

(e.g., different models of land conservation (e.g., purchase, conservation easements, auctions) typically over different time periods).

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How to estimate species distributions?

Eastern Phoebe Migration

Steven Philips, Miro Dudik & Rob Schapire

Maxent

Information Sciences

  • D. I. MacKenzie, J. D. Nichols, G. B. Lachman,
  • S. Droege, J. A. Royle, and C. A. Langtimm. 2002

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Kelling Active research area bringing together machine and statistical learning: H15&#,+$#'$:'N66(34#68UA&5&6)$#'/$2&*'$:' Y46C&#F+&'&5'4*B'RSSZ'

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eBird: Citizen Science at the Cornell Lab. Of Ornithology

The Citizen Science project at the Lab of Ornithology at Cornell empowers everyone interested in birds — from research labs to backyards to remote forests, anyone who counts birds – to contribute to research.

!! Increase scientific knowledge

Gather meaningful data to answer large-scale

research questions

!! Increase scientific literacy

Enable participants to experience the process of scientific investigation and develop problem- solving skills

!! Increase conservation action

Apply results to science-based conservation

efforts Examples of research and outreach outputs:

CLO: Track record

  • f influencing

conservation science.

Online Research Kit The State of The Birds

  • .*+$/0!$1"+2$&1'*+.34&#'$5+&6$6&+*$(73#$$

8009000$:&;34&#'$

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Processing and Analysis

Information Sciences

eBird

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Citizen Science and HCI

"How to infer and factor in expertise level of observer? "How to engage citizens? Ideally to the desired locations " " Active Learning: where to sample next?

How to reduce uncertainty & increase accuracy of species distribution models

US eBirdLocations

Sampling bias: Highly concentrated data

XJ!'

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More --- next talk by Bill Tomlinson

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Monitoring of Global Forest Cover

!! Automated Land change

Evaluation, Reporting and Tracking System (ALERT)

  • !

Planetary Scale Information System for assessment of disturbances in the global forest ecosystem:

  • ! Forest fires, droughts, floods, logging/

deforestation, conversion to agriculture

!! This system will help

  • !

quantify the carbon impact of changes in the forests

  • !

Understand the relationship to global climate variability and human activity

  • !

Provide monitoring and verification system needed for the UN REDD+ program for saving tropical forests

!! Provide ubiquitous web-based

access to changes occurring across the globe, creating public awareness

Slide by Vipin Kumar

Planetary Skin ! a global nervous system that will integrate land-sea-air-and-space-based senso helping the public and private sectors make decisions to prevent and adapt to climate change. Time

Planetary Skin Institute Information technology can make a huge impact on the environmental community by helping develop global datasets (e.g., for water, food, energy), that are key for sustainability research.

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aR'

Sensing and Monitoring for Sustainability

!! Want most useful information at minimum cost !! Exploit structure to efficiently find near-optimal solutions

–! Many important sensing utility functions are submodular "E.g.: Greedy algorithm finds near-optimal set of observations

!! Resulting algorithms perform well on real applications

–! E.g., top score in Battle of the Water Sensor Networks challenge –! Can handle robustness, complex constraints, dynamics, !

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Slide by Andreas Krause

Sensor networks for monitoring environments: data collection, analysis, synthesis, and inference in large- scale sensor networks.

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Understanding Species Interactions: Food Webs !! Food webs who eats whom among species within their natural habitats

–! Nodes – species –! Edges – feeding relationships between the species Question how does Nature balance the abundance of different species? Can we predict the consequences

  • f invasive alien species?

Can we predict the consequences

  • f extinction due to biodiveristy loss?

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Neo D. Martinez Pacific Ecoinformatics and Computational Ecology Lab

www.FoodWebs.org

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Understanding Species Interactions: Network Science - Food Webs !! Food webs who eats whom among species within their natural habitats

–! Nodes – species –! Edges – feeding relationships between the species Question how does Nature balance the abundance of different species? Can we predict the consequences

  • f invasive alien species?

Can we predict the consequences

  • f extinction due to biodiveristy loss?

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Neo D. Martinez Pacific Ecoinformatics and Computational Ecology Lab

www.FoodWebs.org

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Understanding Species Interactions: Network Science - Food Webs !! Food webs who eats whom among species within their natural habitats

–! Nodes – species –! Edges – feeding relationships between the species Question how does Nature balance the abundance of different species? Can we predict the consequences

  • f invasive alien species?

Can we predict the consequences

  • f extinction due to biodiveristy loss?

35

Neo D. Martinez Pacific Ecoinformatics and Computational Ecology Lab

www.FoodWebs.org

Network modeling, prediction, and

  • ptimization –

challenging research area when considering the dynamics of nodes. Key to understanding coupled human-natural systems and allow prediction of potential ecological and economic consequences of natural and human-driven forces acting upon them.

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Understanding Climate Change: A Data-Driven Approach

  • !Climate change is the defining issue of our era
  • !Actionable predictive insights are required to inform policy
  • !Physics-based models are essential but not adequate

–! Models make relatively reliable predictions at global scale for ancillary variables such as

temperature

–! But provide the least reliable predictions for variables that are crucial for impact assessment

such as regional precipitation

Regional hydrology exhibits large variations among major IPCC model projections

Disagreement between IPCC models

Predictive Modeling Enable predictive modeling of

typical and extreme behavior from multivariate spatio-temporal data

Relationship Mining

Enable discovery of complex dependence structures: non- linear associations or long range spatial dependencies

Complex Networks

Enable studying of collective behavior of interacting eco-climate systems

High Performance Computing

Enable efficient large-scale spatio- temporal analytics on exascale HPC platforms with complex memory hierarchies

Transformative Computer Science Research

  • !Science Contributions

–! Data-guided uncertainty reduction by blending physics models and

data analytics

–! A new understanding of the complex nature of the Earth system and

mechanisms contributing to adverse consequences of climate change

  • !Success Metric

–! Inclusion of data-driven analysis as a standard part of climate

projections and impact assessment (e.g., for IPCC)

... data-intensive science [is] …a new, fourth paradigm for scientific exploration." - Jim Gray

Project aim: A new and transformative data-driven approach that complements physics-based models and improves prediction of the potential impacts of climate change

Lead PI: Vipin Kumar

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Socio-Economic Systems: Poverty, Agricultural Systems, Harvesting Policies

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Poverty maps

Identifying the poor is the first essential step

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Targeting maps

Targeting the best response to reduce poverty

,3+>*4#>$63F'I$ $ ''How to estimate the impact and marginal returns of different assets?

Poverty interventions need to be targeted to specific areas Asset-based investments have spatially-varying marginal returns

' Policies for Poverty Reduction: Which set of interventions to apply to each targeted area to maximize the poverty reduction, subject to resource constraints (e.g. budget))? Challenging problems at the intersection of machine learning and optimization, applied economics and social science. J?%+,'D4%%&['4#2''J$%&8'c4#"'

Average marginal returns of different assets (Uganda)

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AI for Development

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Catastrophe Modeling for Rwandan Disease Surveillance Can mobile phones be used as an early warning system for disease outbreaks? Bayesian anomaly detection algorithms

  • A. Kapoor, N. Eagle, E. Horvitz

Spatiotemporal Diffusion of Contraceptive Norms How do contraceptive norms spread through rural areas of the developing world? Spatiotemporal diffusion models have the potential to better evaluate the efficacy of HIV prevention techniques and inform policy decisions related to public health. –

  • H. Yoshioka, N. Eagle

Many other exciting projects!!!!

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Harvesting Policies Fishery Management

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Natural Resource Management: Policies for harvesting renewable resources

!! The biomass of fish is estimated to be 1/10 of what it was 50 years ago and is declining (Worm et al. 2006).

!! The state of the worlds marine fisheries is alarming !! Researchers believe that the collapse of the worlds major fisheries is primarily the result of the mismanagement of fisheries (Clark 2006; Costello et al. 2008).

There is therefore a clear urgency of finding ways of defining policies for managing fisheries is a sustainable manner. Over Harvesting

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Natural Resource Management: Policies for harvesting renewable resources

Economy Increasing Complexity: more complex models and multiple species interactions Example of a Biological Growth Function F(x): Logistic map: x t+1 = r xt (1 - xt), r is the growth rate

We are interested in identifying policy decisions (e.g. when to open/close a fishery ground over time).

Combinatorial optimization problems with an underlying dynamical model.

Class of Computationally Hard Hybrid Dynamic Optimization Models

Clark 1976; Conrad 1999; Ang, Conrad, Just, 2009; Ermon , Conrad, Gomes and Selman 2010

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An Application to the Pacific Halibut Fishery in Area 3A Regulated by International Pacific Halibut Commission (IPHC)

Pacific Halibut Fishery in Area 3A

Ermon , Conrad, Gomes and Selman UAI 2010

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General MDP Framework Resource dynamics Closed loop policy To maximize total discounted utility

E/$(#5'*&d' e&M',5$6C',+F&' >5$6?4,)6+58' Goal: policy for optimal exploitation

  • ver time

" natural MDP formulation Resource growing over time Uncertain dynamics Economics of harvesting Ermon , Conrad, Gomes and Selman UAI 2010

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Main result !! Fixed costs and variable costs !! Concavity of the growth function !! Robust optimization framework (Worst-case for Nature)

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The Pacific Halibut Fishery in Area 3A

!! Regulated by International Pacific Halibut Commission (IPHC)

Optimal policies for management of renewable resources using MDPs Total Allowable Catch Policy " Constant Proportion Policy "rate of fishing ~ 12.3% of estimated stock. Our Result: Policies with periodic closures of a fishery can outperform Constant Proportion Policies Ermon, Conrad, Gomes, Selman, UAI 2010

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Markov Decision Processes (MDPs) to Model for many renewable resource allocation problems. Renewable resources: forests and fisheries Problems with a similar mathematical structure:

  • Pollution management,
  • Invasive species control,
  • Supply chain management and
  • Inventory control, and many more.

General Approach to model renewable resources with complex dynamics!!!! Optimal policies for management of renewable resources using MDPs Ermon, Conrad, Gomes, Selman, UAI 2010

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%!Energy Energy efficiency and renewable energy

49

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Energy Efficiency

!! Global warming and climate change concerns have led to major changes in energy policy in many industrial countries. !! There are tremendous opportunities to increase energy efficiency, such as through the design of control systems for smart buildings, smart grids, smart vehicles, data centers, etc.

–! For example, in the United States buildings consume 39% of the energy used nationwide and 70% of the electric energy used.

Smart buildings

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Data Centers !! Environmental Protection Agency estimates data center capacity will grow 10% year in next decade !! Data center costs

"!increase 20% year (v.s. 6% for overall IT). "!Huge Inefficiencies - server utilization rarely exceeds 6% and facility utilization as low as 50%. (McKinsey & Co Report 2008)

!! Co2 – carbon emissions of the worlds data centers

& emissions of Argentina and the Netherlands (McKinsey & Co Report 2008)

51

Main reasons for companies to try to cut energy costs

The IT industry and academia are actively researching new ways of increasing energy efficiency ----- advanced power management hardware, smart cooling systems , virtualization tools, dense server configurations, etc.

But increasing energy efficiency is not the main path towards reducing carbon emissions

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Renewable Energy !! The development of renewable energy sources that are cleaner and generate little or no carbon can have a much greater environmental impact. !! There has been considerable technological progress in the area of renewable energy sources, in part fostered by government incentives.

52

Renewable Energy

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Energy Independence and Security Act (2007) DOE was charged with implementing the Smart Grid: Complex Digital Ecosystem

For example consumers will have smart meters that can 1.! track energy consumption, 2.! monitor individual power circuits in the home, 3.! control smart appliances and actively manage their energy use; 4.! dynamically select different providers, 5.! sell excess energy (e.g., car battery, wind, biomass) to grid, etc

"from largely non-digital, electromechanical grid to a network of digital systems and power infrastructure; "from a centralized, producer-controlled network to a more decentralized system allowing greater consumer and local producer interaction. Research in sensing and measuring technologies, advanced control methods (monitor and respond to events), dynamic pricing, improved interfaces, decision support and optimization tools, and security and privacy.

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SLIDE 54

How to integrate the different sources into the smart grid ? challenging dynamical problems!!! What is the best mix of energy generation technologies? What is the best mix of storage technologies? Where to locate renewable energy plants?

Challenge of Managing the Power Grid: Balancing different supply and demand sources

US Power Grid

Total energy produced must be equal to the amount consumed by the system loads AT ALL TIMES:

Managing the Power Grid is a Balancing Act!!!

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SLIDE 55

55

Ambitious mandatory goal of 36 billion gallons of renewable fuels by 2022

(five-fold increase from 2007 level)

Energy Independence and Security Act

(Signed into law in Dec. 2007)

Farmers Fuel distributors Environmental impact Consumers Energy crops Non-energy crops Social welfare Food supply Gasoline producers

Water quality

Soil quality

Local air pollution

Biodiversity Energy market

Economic impact

Advanced Biofuels ( Cleaner) (non food crops and biomass )

Switchgrass Wood Waste Animal Waste Municipal Waste

First generation Biofuels

Energy Efficiency and Renewable Energy: Biofuels

Computational challenges: Large Scale Logistics Planning Realistic Computational Models to Evaluate Impact

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SLIDE 56

56

Feedstock Map

Large Scale Stochastic Logistics Planning for Biofuels

Large-scale investment in new technology provides exciting logistical planning and optimization challenges and opportunities

Biomass Map Potential biorefinery locations Transportation Network (Roads, Rail, Marine) Distribution Terminals and Inter-Modal Facilities to Transfer Liquid Fuel

Resulting optimization models are beyond the scope of the current state of the art in several ways:

  • large-scale input;
  • stochastic nature (e.g.,feedstock

and demand) " new models to capture uncertainty "!new stochastic

  • ptimization algorithms;
  • dynamics of evolution of demand

and capacity

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SLIDE 57

Farmers Fuel distributors Environmental impact Consumers Energy crops Non-energy crops Social welfare Food supply Gasoline producers Water quality Soil quality Local air pollution Biodiversity Energy market Economic impact

Current approaches limited in scope and complexity !! E.g. based on general equilibrium models (e.g., Nash style) !! Strong convexity assumptions to keep the model simple enough for analytical, closed-form solutions (unrealistic scenarios) " Limited computational thinking Transformative research directions !! More realistic computational models in which meaningful solutions can be computed !! Large-scale data, beyond state-of-the-art CS techniques !! Study of dynamics of reaching equilibrium — key for adaptive policy making! Impact on Land-use Impact on food prices?

Realistic Computational Models and Metrics to Study Sustainability Impacts (e.g. Impact of Renewable Energy Sources )

How to measure risks/ predict rare events? Life Cycle Analysis General Equilibrium Models Models and Metrics!!!!!

Complex Adaptive Systems and Multi-Agent Systems

Multi-agent systems, multi-agent equilibrium models, game theory, and design of effective mechanisms and policies for the exchange of goods.

deling and control of complex high-dimensional systems

  • mbining physics-based models, model-based reasoning,
  • ptimization and control methods, and

machine learning models built from large-scale heterogeneous data.

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SLIDE 58

Farmers Fuel distributors Environmental impact Consumers Energy crops Non-energy crops Social welfare Food supply Gasoline producers Water quality Soil quality Local air pollution Biodiversity Energy market Economic impact

Current approaches limited in scope and complexity !! E.g. based on general equilibrium models (e.g., Nash style) !! Strong convexity assumptions to keep the model simple enough for analytical, closed-form solutions (unrealistic scenarios) " Limited computational thinking Transformative research directions !! More realistic computational models in which meaningful solutions can be computed !! Large-scale data, beyond state-of-the-art CS techniques !! Study of dynamics of reaching equilibrium — key for adaptive policy making! Impact on Land-use Impact on food prices?

Realistic Computational Models and Metrics to Study Sustainability Impacts (e.g. Impact of Renewable Energy Sources )

How to measure risks/ predict rare events? Life Cycle Analysis General Equilibrium Models Models and Metrics!!!!!

Complex Adaptive Systems and Multi-Agent Systems

Multi-agent systems, multi-agent equilibrium models, game theory, and design of effective mechanisms and policies for the exchange of goods.

Modeling and control of complex high-dimensional systems by combining physics-based models, model-based reasoning,

  • ptimization and control methods, and

machine learning models built from large-scale heterogeneous data.

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SLIDE 59

59

The role of Experimental Research Crop Soil Science Material Discovery

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SLIDE 60

Agricultural Systems and GHGs emissions

60

Agriculture is the primary driver of land use change and deforestation and an important source of Greenhouse Gases (GHG)s: 52% and 84% of global anthropogenic CH4 and N2O, significant C02 Nitrogen Based Fertilizers 31% Source of Greenhouse Gases

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SLIDE 61

Nitrogen Based Fertilizers

Nitrogen Cycle and Fertilizers

61

Spatial and temporal analysis of Nitrogen cycle Study of fertilizers and design of Experiments Collaborator Harold van Es Dead Zone in Gulf of Mexico Fertilizers have played a key role in the increase of food production but they key culprits in the production of greenhouse gases emissions creating dead zones Townsend & Howarth (2010) Scientific American

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SLIDE 62

Design of Scientific Experiments (4 Treatments: A,B,C,D)

Perfectly balanced 2.33 Below average Above average

Latin Square Spatially Balanced Latin Square

!! Hybrid IP/CSP based

–! Assignment formulation –! Packing formulation –! Different CSP models

!! SAT/ CSP based approach

–! State of the art model for Latin Square + symmetry breaking by initializing first row and column (SBDD doesnt help;

this is not a completion problem)

!! Local search based approach

These approaches do not scale up max order 6 (Target number 30).

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SLIDE 63

63

Science of Computation: Discovering patterns, laws, and hidden structure in computational phenomena

Streamlining Constraint Reasoning

Discovery of structural properties across solutions (machine learning); Divide (streamline) the search space by imposing such additional properties.

Design of Scientific Experiments for Studying Fertilizers – Spatially Balanced Latin Squares Existence of SBLS – open problem in combinatorics

"!Streamlining "!Scaling up of solutions

Gomes and Sellmann 2003/2004

YES: XOR-Streamlining based on random parity constraints

(Valiant and Vazirani 1986, Unique SAT)

Provable bounds for Counting and Sampling.

Gomes, Sabharwal, Selman, 2006

Discovery of Construction for SBLS for experimental design

LeBras, Perrault, Gomes, 2010

Streamlining by Permutation of Complete Columns of a Cyclic Latin Square

SBLS Order 35

Can we find an domain independent way of streamlining?

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SLIDE 64

64

Material Discovery for Fuel Cell Technology

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SLIDE 65

Material Discovery for Fuel Cell Technology

65

Goal of Material Discovery:

–! Find new products –! Find product substitutes –! Understand material properties

Approach: Analysis of inorganic libraries

"Sputter 2 or 3 metals (or oxides) onto a silicon wafer (which produces a thin-film) "!Use x-ray diffraction to study crystallographic structure of the thin-film "!Note: electromagnetic radiation experiments are very expensive!! Example: study of platinum-tantulum library showed correlation between crystallographic phase and improved fuel cell

  • xidation catalysis (Gregoire et al 2010)

Fuel Cell Applications Ronan LeBras, Damoulas, John M. Gregoire, Sabharwal, Gomes, van Dover

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SLIDE 66

Problem Definition

66

slide-67
SLIDE 67

Problem Definition

67

Fe Al Si

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SLIDE 68

Problem Definition

68

Fe Al Si

(38% Fe, 45% Al, 17% Si)

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SLIDE 69

Problem Definition

69

Fe Al Si

(38% Fe, 45% Al, 17% Si)

[Source: Pyrotope, Sebastien Merkel]

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SLIDE 70

Problem Definition

70

Fe Al Si

(38% Fe, 45% Al, 17% Si)

15 20 25 30 35 40 45 50 55 60 20 40 60 80 100 120

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SLIDE 71

The Problem: Labeling Points with Phase(s)

71

Fe Al Si

15 20 25 30 35 40 45 50 55 60 20 40 60 80 100 120 15 20 25 30 35 40 45 50 55 60 20 40 60 80 100 120

INPUT:

Fe Al Si

15 20 25 30 35 40 45 50 55 60 20 40 60 80 100 120 15 20 25 30 35 40 45 50 55 60 20 40 60 80 100 120 15 20 25 30 35 40 45 50 55 60 65 10 20 30 40 50 60 70

pure phase regions

UNDERLYING PHYSICAL STRUCTURE:

Fe Al Si

Labeled regions mixed phase region mixed phase region

OUTPUT:

! !+" " "

NP-hard

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SLIDE 72

Synthesis of Constraint Reasoning and Machine Learning Approaches for Material Discovery

Standard Clustering Approaches: Based on pure Machine learning techniques + Good at providing a rough, data driven, global picture + Can incorporate complex dependencies and global similarity structure

  • Easily miss critical details (physical properties)

72

Two global alignment kernels

  • for a ternary problem instance

Optimization Model

Constraint reasoning and optimization + Great at enforcing the detailed constraints + Can encode and capture the physicsbehind the process

  • Do not scale up
slide-73
SLIDE 73

Whats New: Solving it Properly Requires!

73

! a robust, physically meaningful, scalable, automated solution method that combines:

Similarity Kernels

  • & Clustering

Machine Learning

for a global data-driven view

  • Underlying

Physics

A language for

Constraints

enforcing

  • local details
  • Constraint Programming model

Significantly outperforming previous methods.

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SLIDE 74

74

I Computational Sustainability II Examples of Computational Sustainability problems highlighting research themes III Institute for Computational Sustainability IV Building a community in Computational Sustainability V Conclusions Outline

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SLIDE 75

Interdisciplinary Research Projects (IRPs): The Building Blocks of our Institute

!! A major part of the effort has been identifying a variety of collaborative projects that bring computer scientists together with domain experts in a number of fields !! Individual projects organized under the umbrella of IRPs (Interdisciplinary Research Projects)

–! Currently 13 Application IRPs, 5 Technical IRPs –! Many more in incubation!

Application IRP: Bird Conservation Application IRP: Biofuels Technical IRP: Dynamical Systems Technical IRP: Optimization Species distribution modeling Bird migration RCW preservation Reducing sampling bias Equilibrium models Impact of gasoline taxes Carbon offsets in cap-and-trade

. . . .

Problem structure Stochastic

  • ptimization

Multi-agent inference Balanced designs Parameter estimation Synchronization Monitoring of sustainability Critical transitions Examples:

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SLIDE 76

IRP Name

Researchers Collaborators Students

1.

Reserve Selection and Wildlife Corridors

Conrad, Gomes, Sabharwal, Selman, Shmoys Dilkina, Dimiduk, Drusvyatskiy 2.

Bird Conservation

  • !Species distribution
  • !Bird migration
  • !RCW preservation

Lab of O: Rosenberg, Webb TCF: Allen, Amundsen, Vaughan Cornell: Conrad, Damoulas, Gomes, Sabharwal, Shmoys OSU: Dietterich, Hutchinson, Sheldon, Wong Lab of O: Farnsworth, Fink, Hames, Hochachka, Kelling, Wood Cornell: Hooker, Joachims, Riedewald Ahmadizadeh, Castorena, Dilkina, Elmachtoub, Finseth 3.

Fishery Management and Fish Preservation

Conrad, Gomes, Sabharwal, Selman, Yakubu, Zeeman Jerald, Ziyadi Alam, Ermon, Haycraft, Li, Wiley 4.

Disease Prevention in Dairy Cows

Damoulas, Ellner, Gomes, Sabharwal, Selman Grohn, Cha Ahmadizadeh, LeBras, Prakash, Smith, Teose 5.

Forest Fires

Borradaile, Dietterich, Montgomery, Rusmevichientong, Shmoys, Wong Ferst, Spencer, Gagnon, Houtman, Mark, Reynolds

Application IRPs

continued !

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SLIDE 77

IRP Name

Researchers Collaborators Students

6.

Modeling Ecological Dynamics

Ellner Jones, Mao-Jones, Ritchie, King, Rohani, Ionides, Kendall, Reumann, Newman, Ferrari, Hooker 7.

Biofuels

  • !Equilibrium models
  • !Cap-and-trade

Bento, Walker Anderson Bergstrom, Cuvilliez, Kang, Klotz, Landry, Latza, Mayton, Patel, Roth, Stanislaus, Taranto, Weiz 8.

Pastoral Systems in East Africa

Barrett, Gomes, Selman, Wong Kariuki, Leeuw, Smith Guo, Toth, Zhuo 9.

Poverty Mitigation and Food Insecurity

Barrett, Damoulas, Gomes, Lentz, Naschold Allen, Bell, Lang, Maxwell, McGlinchy, Murray Dilkina, Guo, Harou, Lang 10.

Invasive Species

Conrad, Shmoys Dietterich,Gomes Hutchinson, Sheldon Yang, Ermon, Spencer 11.

Impact of Climate Change

Guckenheimer, Mahowald, Zeeman Many colleagues in climate science 12.

Stress/Environment Interactions

Zeeman McCobb Gribizis 13.

Material Discovery

Damoulas, Gomes, Sabharwal Gregoire, van Dover LeBras

Application IRPs (continued )

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SLIDE 78

78

IRP Name

Researchers Collaborators Students

14.

Dynamical Systems

  • !Parameter estimation
  • !Synchronization
  • !Monitoring of sustainability

Guckenheimer, Strogatz, Zeeman Haiduc, Kuehn 15.

Network Science

  • !High dimensional data
  • !Sensor networks
  • !Dynamics & Sync

Gomes, Hopcroft, Selman, Strogatz Ermon, Sheldon 16.

Bridging Constraint Reasoning and Machine Learning

Damoulas, Dietterich, Gomes, Sabharwal Gregoire, van Dover LeBras 17.

Combinatorial Reasoning and Stochastic Optimization

  • !Problem structure
  • !Stochastic optimization
  • !Multi-agent inference
  • !Balanced designs

Gomes, Sabharwal, Selman, Shmoys, Sheldon Malitski, Sellmann Cheung, Dilkina, Ermon, Guo, Kroc, LeBras, Perrault, Ramanujan 18.

Large Scale Computing Paradigms for Massively Large Data Sets and Simulation-Intensive Studies

  • !Cloud computing

Gomes, Sabharwal, Selman Ahmadizadeh, Dilkina, Kroc

Technical IRPs

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SLIDE 79

79

Constraint Satisfaction and Optimization Data and Uncertainty Distributed Highly Interconnected Components / Agents Complexity levels in Computational Sustainability Problems Dynamics

Study computational problems as natural phenomena " Science of Computation Many highly interconnected components; " " From Centralized to Distributed: multi agent systems Complex dynamics and Multiple scales " " From Statics to Dynamics: Complex systems and dynamical systems Large-scale data and uncertainty " " Machine Learning, Statistical Modeling

Transformative Computer Science Research: Driven by Deep Research Challenges posed by Sustainability

Design of policies to manage natural resources translating into large-scale optimization and learning problems, combining a mixture of discrete and continuous effects, in a highly dynamic and uncertain environment " increasing

levels of complexity

Complex decision and optimization problems " Constraint Reasoning and Optimization

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SLIDE 80

80

Transformative Computer Science Research: Driven by Deep Research Challenges posed by Sustainability

Data & Machine Learning

DietterichPI WongCo-PI ChavarriaH

Environmental & Socioeconomic Needs Dynamical Models

Guckenheimer Strogatz ZeemanPI,W YakubuAA

Constraint Reasoning & Optimization

Gomes PI,W

, Hopcroft Co-PI

SelmanCo-PI

, ShmoysCo-PI

Resource Economics,

Environmental Sciences & Engineering

AlbersCo-PI,W, Amundsen, Barrett, Bento, ConradCo-PI, DiSalvo, MahowaldW, MontgomeryCo-PI,W Rosenberg,SofiaW, WalkerAA

Transformative Synthesis: Dynamics & Learning

Science of Computation Science of Computation

Study computational problems as natural phenomena " Science of Computation Many highly interconnected components; " " From Centralized to Distributed: multi agent systems Complex dynamics and Multiple time scales " " From Statics to Dynamics: Complex systems and dynamical systems Large-scale data and uncertainty " " Machine Learning, Statistical Modeling Complex decision and optimization problems " Constraint Reasoning and Optimization

Design of policies to manage natural resources translating into large-scale optimization and learning problems, combining a mixture of discrete and continuous effects, in a highly dynamic and uncertain environment

" increasing levels of complexity

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SLIDE 81

Institute Activities

ICS

Research

Coordinating transformative synthesis collaborations Interdisciplinary Research Projects (IRPs) Web Portal Seminars

Building Research Community

Host visiting Scientists Conference & Workshops External Collaborations Summer REU program targeting minority students Computational Sustainability courses Research seminar series Postdocs Doctoral students Honors projects

Education

Cornell Cooperative Extension Citizen Science

  • Lab. Of Ornithology

Outreach

Conservation Fund Rocky Mountain Research Station The Nature Conservancy K-12 Activities Travel Museum

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SLIDE 82

Computational Sustainability Community Conferences, Workshops, Discussion Groups

CompSust09: Cornell, 2009 Over 225 international researchers from several

disciplines and institutions (universities, labs, government)

International Workshop on Constraint Reasoning and Optimization for Computational Sustainability

  • ! CROCS-09 at CP-09
  • ! CROCS at CPAIOR-10
  • ! CROCS at CP-10

NIPS-09 Mini Symposium: Machine Learning for Sustainability

Blogs:

Over 150 participants and lots of topics!!

CompSust 10: MIT, 2010 AAAI 2011 Special Track on Computational Sustainability February 3, 2011: abstracts due February 8, 2011: papers due

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SLIDE 83

Conclusions

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SLIDE 84

Computational Sustainability

Interdisciplinary field that aims to apply techniques from computing and information science, and related fields (e.g., engineering, operations research, applied mathematics, and statistics ) for Sustainable Development.

84

Sustainable Development encompasses balancing environmental, economic, and societal needs.

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SLIDE 85

85

Sustainability

Climate Natural Resources Social Factors Human Factors Education Economic factors Energy Public Policy

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SLIDE 86

Computational Sustainability attempt at a definition

86

Wide interdisciplinary field , encompassing disciplines as diverse as economics, sociology, environmental sciences and engineering , biology, crop and soil science, meteorology and atmospheric science.

Key challenge: to effectively and efficiently establish interdisciplinary collaborations – the level of interconnectedness of social, economic, and environmental issues makes it really challenging!

Focus: Develop computational models, methods and tools for a broad range of sustainability related applications and task: from supporting decision making and policy analysis concerning the management and allocation of natural resources to the development of new sustainable techniques, products, practices, attitudes, and behaviors.

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SLIDE 87

Computational Sustainability

87

Computer science and related fields Sustainability fields

New challenging applications for Computer Science Computational Thinking that will provide new insights into sustainability problems:

Analogy with Computational Biology

New methodologies In Computer Science New methodologies In Sustainability fields

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SLIDE 88

Summary Computational Sustainability has great potential to advance the state of the art of computer science and related disciplines with unique societal benefits!

88

Thank You!

slide-89
SLIDE 89

89

From the Cloud Institute, NY

Why Computational Sustainability?

Thank you!

slide-90
SLIDE 90

Computational Sustainability Statistics eScience

Networks & Systems

HCI

Game Theory

Operations Research

Systems Eng.

Appl. Mathematics

AI

Alg. Theory

CompSust

Climate Natural Resources Social Factors Human Factors Education Economic factors Energy Public Policy

90

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SLIDE 91

91

slide-92
SLIDE 92

Challenges Managing scientific data: coping with a multidisciplinary world

Table of Product Characteristics id Property name Value MilkProd productsrep MilkA MilkProd quantity 10000 MilkProd validity date 10/06/2006 CheeseProd products rep Minas CheeseProd quantity 2000 CheeseProd validity date 12/02/2006 CheeseProd shape Circular

Slide by Claudia Bauzer Medeiros, 2010

Deluge of heterogeneous data from distributed noisy sensors: Need for Technical skills Socio-emotional skills Transcultural skills

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SLIDE 93

How to get people to care? Personalization

!! Identify places consumers have an impact and are impacted by resource usage

–! Use social science to understand consumer attitudes

–! Make sustainability economically relevant

!! Identify reasons for industry to care, e.g.,

–! Perception as Environmental Leader –! Energy reductions in operations and products –! New markets, products, services

  • ! Address tussle between Security &

Privacy of data

–! Facilitate ubiquitous monitoring-inferencing- actuation –! Simplify device and data management for mere mortals

93

Goal: Trusted Personal Energy Management at the edge of the Smart Grid

Source : EPRI Source : ASU

Slide by Eve M. Schooler

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SLIDE 94

Existing and proposed wind farms in US and Mexico (2008)

  • ! 26,000+ turbines, 1.5% of potential

Build-out to reach potential would require >1.7 million turbines

  • ! Areas with most favorable winds are

also often associated with migratory pathways Andrew Farnsworth, Ken Rosenberg, 2009

: Wind Energy and Bird Conservation

IWhere to not locate wind farms? Guidelines for locating wind farms

Ken Rosenberg (ICS) part of the science team for the State of the Birds Report