Laurent Tambayong

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Laurent Tambayong



E-mail: ltambayo[at]uci[dot]edu or laurent[at]cs[dot]cmu[dot]edu


Laurent has been co-director of the wiki complexity events with D. R. White since January, 2009
http://de.scientificcommons.org/laurent_tambayong

ACADEMIC POSITION:

Postdoctoral Researcher, Carnegie Mellon University, School of Computer Sciences (2009-now)
Center for Computational Analysis of Social and Organizational Systems
and
Institute for Software Research International

EDUCATION:

University of California at Irvine
Ph.D. Social Science, with concentration in Mathematical Behavioral Sciences and emphasis in Social Networks, Dynamics, and Complexity (2009)
Dissertation title: "Strategic Alliance: A Game-Theoretic Network Model"
M.A. Social Science, with emphasis in Mathematical Behavioral Sciences (2007)

Cornell University
M. Eng., Engineering Management (2002)
Certificate in Systems Engineering

Ohio State University
Summa cum laude and with honors in the liberal arts
B.S.I.S.E., Industrial and Systems Engineering, with emphasis in Operations Research and Systems Engineering (2000)
B.S., Psychology, with emphasis in Judgment/Decision Making and Organizational Behavior (1999)
Minor in Economics


RESEARCH PHILOSOPHY:
I believe that substantive and formal theories should go concurrently. Thus, using this concurrent approach, three important factors are investigated: (i) the motives and decision-making processes of the agents; (ii) the predictive evolution processes given the ecological and informational constraints, and (iii) the internally validated as well as empirically verified results. Substantive theories give insight as to motives and test the results of formal theories. Formal theories, in turn, provide for internal validation of the theoretical frameworks.


CURRENT SUBSTANTIVE RESEARCH INTERESTS:

  • Strategic Alliance and Network Economics

There are several classes of this topic that I am interested in:(i) there is a need to balance between cooperation for common goals and competition for limited resources. Thus, how do firms or nations strategically maximize their well-being in their coexistence with others? My current approach is to use game-theoretic network model. Game theory provides for the motive while the network setting provides for the ecology of the interactions. I use both analytical and simulation solutions for this approach; (ii) I am interested in investigating longitudinal trade networks from producer to consumer. How do commodities flow given the competition of the interested agents? How does incomplete information in the market structure allow intermediary agents to make profits? How stable is the structure of this kind of network? This research will likely use Meta-Network Analysis, Game Theory, Agent-Based Modeling, with possible Stochastic and Supply-Chain elements.

  • Meta-Network Analysis

This approach identifies the key entities of the networks: agent, event, knowledge, location, resource, and task. The cross-entity relationships are then explained using network analysis. When longitudinal data is available, then the evolution of the meta-network could also be analyzed. This approach uses Dynamic Network Analysis, which is a step beyond Social Network Analysis. For example, agent x agent relationship is Social Network Analysis and event x event relationship is GANTT Chart.

  • Network Evolution and Structure

How do networks change and how will that affect their structures? If we consider the nodes as entities and the links as their collaborative interactions, how will the change cause the attributes of the node to change, specifically, in terms of their degree distributions? My current collaboration with Aaron Clauset, Cosma R, Shalizi, and Douglas R. White investigates how the degree distributions of various empirical data follow the q-exponential distribution, which is derived from non-extensive physics.

  • Organizational Systems and Change

A network of collaborative organizations is a complex system that grows and adapts. I am interested to see how this network evolves to adapt a new challenge and environment, especially in terms of structural cohesion and hierarchy. I have two primary interests in this subject. The first one is implementing grouping algorithm based on Structural k-Cohesion. The second one is to analyze the macro properties of network using q-exponential and calculate the parameters that identify growth, decline, or crash of the network.

  • Historical Dynamics and Comparative Civilizations

Some civilizations thrive while some others become extinct. This phenomenon is also important since we still face this problem in the contemporary societies. By learning historical dynamics of past civilizations, I hope to learn and get insights for the key causes and constraints. Such study is complex due to the interactions of the agents (individuals, cities, nations) involved. My current collaboration with Douglas R. White studies such issues with city as the level of the analysis. We learn and model historical city trade networks and populationships. By identifying the parameters using a method in non-extensive physics, q-exponential, we hope to get insights on how these city networks sustain or crash.


METHODS AND TOOLS OF ANALYSIS (in alphabetical order)

  • I am well-versed in analytical, simulation, and empirical modeling, with methods that include but are not limited to:

o Decision analysis
o Dynamic and feedback modeling
o Dynamic network analysis
o Game theory
o GANTT chart
o Influence network
o Linear, integer, non-linear, and dynamic programming
o Meta-network analysis
o Multi-agent modeling
o Network optimization
o Network scaling and generative process modeling
o Optimization
o Semantic Network Analysis
o Simulation (various types)
o Social network analysis
o Statistical analysis
o Stochastic modeling
o Structural k-connectivity
o Systems analysis
o Trail analysis
o Webscrapping

  • Examples of my tools of analysis include but are not limited to:

ARENA, AutoMap, DATA, LINDO, LINGO, Maple, Matlab, Minitab, MS Access, MS Excel, MS Project, MS Visio, ORA, Pajek, R, SPSS, UCINET.

In general however, I find that software packages for simulation are likely to be constrained and biased to the specific models and the scientific approach of their developers. Thus, I prefer to build my own simulation model to analyze specific research questions.


PUBLICATIONS:
1. White, D.R., L. Tambayong, and N. Kejžar. 2008. Oscillatory dynamics of city-size distributions in world historical systems.Globalization as Evolutionary Process: Modeling, Simulating, and Forecasting Global Change. pp. 190-225. Eds. George Modelski, Tessaleno Devezas, and William R. Thompson. London: Routledge.
2. Tambayong, L. 2007. Dynamics of Network Formation Processes of the Co-Author Model. Journal of Artificial Societies and Social Simulation vol. 10, no. 3 2.


WORK IN PROGRESS:
1. A simulation model for entrepreneurial alliances. Three papers submitted, thus I can't list the titles here due to the double-blind process
2. Sudan Project. This project attempts to identify the vulnerabilities of tribes’ relations in Sudan through content and semantic analysis. Semantic data are extracted into time-longitudinal meta-networks to identify the key entities of the networks: agent, event, knowledge, location, resource, and task.
3. Indonesia Project. This project attempts to understand the evolution of Indonesian political elite post-Suharto. I attempt to show that there is a growing and maturing democratization process in Indonesian politics. Another objective of this project is to understand the nature of Indonesian terrorism networks.
4. Tsallis q distribution project (Laurent Tambayong, Aaron Clauset, Cosma R. Shalizi, and Douglas R. White). Drafted: (c) 2008 q-Exponential Distributions in Empirical Data
5. Tsallis q historical cities and city sizes (Douglas R. White and Laurent Tambayong). Drafted: (c) 2008 City Growth and City System Dynamics: vulnerability and resilience. (Second part only, very preliminary, not for citation


INVITED CONFERENCES AND PRESENTATIONS:
1. Tambayong, L. Boolean Network and Simmelian Tie in the Co-Author Model: A Study of Dynamics and Structure of a Strategic Alliance Model. A short lecture for European Conference on Complex Systems, September 2009.
2.Tambayong, L. Simulating Game Theoretic Micro-Trade Networks as the Dynamics of Entrepreneurial Organization Formations. A video conference for Human Science and Complexity at UC Irvine, January 25, 2008.
3.White, D.R., L. Tambayong. Rethinking Social Complexity and Resilience: Human Survival and Complex Network Dynamics at Continental Scales. A video conference for Human Science and Complexity at UC Irvine, April 20, 2007.
4. Tambayong, L. City-System Resilience: China Historically and Today. A presentation at Institute for Mathematical Behavioral Sciences research fellowship, November 1, 2006.
5. White, D.R., L. Tambayong. The Five Alternations between Global Economy and Regional Economies in Eurasia in the Last Millennium: Definitive Evidence of Macro Civilizational Dynamics. A video conference for Human Science and Complexity at UC Irvine, June 22, 2006
6. Tambayong, L., D.R.White. A Relational Law of City Networks, Network Biconnectivity, Trade, and the q-dynamics of Historical City-Size Distributions. A presentation at Santa Fe Institute, May 15, 2006.
7. White, D.R., L. Tambayong. Network Dynamics of City Sizes, Trade Networks, and Conflict. Annual Science Board Symposium, Santa Fe Institute, May 12-13, 2006.
8. White, D.R.,N. Kejžar, and L. Tambayong. Discovering Oscillatory Dynamics of City-Size Distributions in World Historical Systems. Paper presented to the Seminar on “Globalization as Evolutionary Process: Modeling, Simulating, and Forecasting Global Change,” sponsored by the Calouste Gulbenkian Foundation, meeting at the International Institute for Applied Systems Analysis (IIASA), Laxenburg, Austria, April 6-8, 2006.
9. Tambayong, L. The Effects of Limited Observation Theory in a Stylish Network Formation Model. A presentation at Institute for Mathematical Behavioral Sciences research fellowship, November 16, 2005.

JOURNAL REFEREEING:

  • Journal of Artificial Societies and Social Simulation (JASSS).

BOOK REVIEWING:

FELLOWSHIPS, GRANTS, AND AWARDS:

  • The Engineering and Physical Sciences Research Council of the United Kingdom, conference travel sponsorship, 2009.
  • UC Irvine, Graduate Dean’s Dissertation Quarter Fellowship, 2009.
  • UC Irvine, Regents' Dissertation Writing Fellowship, 2008.
  • Center for Organization Research, Research Fellowship, 2008.
  • Center for Citizenship Peacebuilding, Kugelman Fellowship, 2008.
  • Center for Computational Analysis of Social and Organizational Systems, Scholarship for Summer Institute, 2008.
  • Institut des Systèmes Complexes Paris-France (partly funded by Réseau National des Systèmes Complexes-France), Summer School, 2007.
  • Center for Citizenship Peacebuilding Shirin, Ebadi Fellowship, 2006.
  • Institute for Mathematical Behavioral Sciences, Summer Fellowship, 2005, 2006, 2007, 2008.
  • UC Irvine, Regents' Summer Fellowship, 2005, 2006, 2007, 2008.
  • Social Dynamics and Complexity program of Institute for Mathematical Behavioral Sciences Research Fund, 2005-now.
  • UC Irvine, Teaching Assistantship, 2004-now.
  • Santa Fe Institute, Visiting Scholar, 2006,2007,2008.
  • Cornell University, Al Underhil '29 Memorial Fellowship, 2000.
  • Department of Industrial and Systems Engineering at the Ohio State University, Best Project Award (group) for “Industrial Practice in Systems Design,” 2000.
  • The University College at the Ohio State University, Summa Award for Superior Scholarship, 1997.


TEACHING:

University of California at Irvine Teaching, Learning, & Technology Center 2009

  • Course Design Certification

University of California at Irvine 2004-2009

  • Econ 20 A Introduction to Economics.
  • Psychology 10 A-B-C Probability and Statistics in Psychology I-II-III.
  • Social Sciences 9 A-B-C Statistics and Probability for Social Sciences I-II-III.


REFERENCES:

Academic references and recent teaching evaluations, both showing a very positive performance, are available upon request.

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Now some random personal stuffs ...

I am married with no kids.

We have 2 dogs, a Jack Russell Terrier and a Dachshund.

I like strategy in general and I like to read book about strategy in my leisure time. My favorites are classic military texts with emphasis on Chinese traditions. An example of my non main-stream favorite is “The Way of the General” by Zhuge Liang.

My Myers-Briggs indicator is INTJ often referred to as the scientist, the free-thinker, or the strategist.

I practice and teach as a hobby Wuzuquan, a Chinese martial arts from southern Shaolin branch. I am also a black belt holder of Kodokan Judo although I am not actively practicing it now.

I got interviewed twice by a local newspaper in Ohio in 1998 when I was participating in a demo against riots in Indonesia. These articles are titled "Indonesian students hope for better future with new leader" and "Students condemn unrest in Indonesia."

I don't paint but love paintings. My favorite painters are Salvador Dali and René Magritte.

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