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Prof. Gautam DasguptaColumbia University
LiveDesign Quantification of Subjective Opinion
in Mitigating Effects of Extreme Events
byGautam Dasgupta, Professor, Civil EngineeringColumbia University, New York, NY 10027, USA
What is LiveDesign?
1. Is it a software?
2. Is it a design concept?
3. What is a conventional design?
4. What are new contributions?
Keywords: Intelligent infrastructure, extreme events, sensing and broadcast
Prof. Gautam DasguptaColumbia University
Design vs. LiveDesign
Conventional design and construction:
1. Cost saving
2. Engineering Calculations
LiveDesign
1. Saving human life and minimizing human suffering
2. Optimize performance using subjective experiences
Prof. Gautam DasguptaColumbia University
IT based LiveDesign
LiveDesign prototypes :
1. Aid authorities after natural and manmade disasters
2. Suggest best evacuation and rescue strategies
3. Broadcast most favorable measures
Prof. Gautam DasguptaColumbia University
Statistical decision in LiveDesign
1. High speed large scale computing
2. Collection of subjective opinions
3. Statistics for extreme events
Knowledge is continuously updated
Decision made in real time
Hence the name: LiveDesign.
Prof. Gautam DasguptaColumbia University
1. Background work from 2001(a) engineers(b) architects(c) computer scientists(d) lawyers
2. LiveDesign core methodology3. Randomly selected office building models4. Seamless open environment --- 9/11, Tsunami, Katrina, Bird Flue …..5. Intelligent civil infrastructures (a) building, roads, bridges
(b) watersheds(c) energy systems
6. Natural and manmade disaster modules
LiveDesign Research
Prof. Gautam DasguptaColumbia University
Principal parts of LiveDesign
1. Intelligent information acquisition (a) Engineering response data (numeric) (b) Sensor measurements (digital) (c) Bodies of laws and code requirements (textual) (d) Subjective opinion (imprecise)
2. Statistical combination of above items 3. Virtual reality-based smart signs : (a) evacuation (b) rescue (c) management communication
Prof. Gautam DasguptaColumbia University
Combine:
1. Structural stress analysis: response history
2. Regulations (such as Building Codes)
3. Legal requirements
4. On-line sensor readings
Quantitative and QualitativeInformation in LiveDesign
Prof. Gautam DasguptaColumbia University
1. Predicts threat from
statistical combination
2. Statistical optimization
for the worst fatal state in space and time
3. Calculations with confidence levels
Fuzzy logic in
LiveDesign
Prof. Gautam DasguptaColumbia University
LiveDesignDataBase
1. Dynamic searches
(a) signal fatal events
(b) check tight bounds for credible threats
(c) continuously fine-tune in a self-learning environment
2. Sort out false alarms
3. discover yet to be identified extreme events
4. Simulate threats
(eg. use Keränen’s extremely rare strings)
Prof. Gautam DasguptaColumbia University
LiveDesignNetwork1. Security costs depend nonlinearly on the associated payoff
2. All indices can be assessed only in the probabilistic sense
3. Computer Algebra (symbolic) calculation:(a) use joint probabilities(b) uses graphical communication language(c) use causality
4. Current modeling procedure is written in Mathematica
5. Mathematical basis is the graph theory
Prof. Gautam DasguptaColumbia University
Elements of the network
1. The network formulation starts with elementary subsystems
2. Modelica can create complex systems using the formal specifications of
the links in the LiveDesign database
3. Benchmark examples have been verified using Mathematica:
Prof. Gautam DasguptaColumbia University
Large number of variables
Conveniently programmed in Mathematica.
Prof. Gautam DasguptaColumbia University
Chemistry and biology provides good analogies:experiments and theory go together in the ‘organic form of design.’
1. There may be more than a single answer
2. Several outcomes possible with different probabilities
3. The fuzzy logic concepts give optimized answer
Prof. Gautam DasguptaColumbia University
LiveDesign representation conept
1. Architects create the LiveBluePrint2. A collection of its various parts, and then assembled.3. Modern buildings are more complicated:
(a) there are additional subsystems(b) such as power, water, elevators(c) and above all a security infrastructure
Prof. Gautam DasguptaColumbia University
Intelligent Infrastructureby LiveDesign
1. Smart structures respond to their surroundings
Safety: Thermo-mechanical inputs
2. Intelligent infrastructures
(a) Security (Safety concerns as subsets)
(c) Management/Government policy and laws
3. Information based technology
(a) Integration of quantitative and qualitative data
(b) Computer understandable . representation/communications
Prof. Gautam DasguptaColumbia University
The LiveDesign Team
1. Universities(a) Columbia University(b) MIT(c) Carnegie Mellon University(d) University of Maine
2. Industries(a) OKG Constructions, NYC(b) Contour Graphics Architects, NYC(c) Serby Attorneys, NYC
3. Foreign collaborators(a) Kagawa University, Japan
(b) Tokyo Metropolitan University, Japan(c) Paris & Besancon, France; AIT Thailand,