Search as a Tool for Emergence

Search as a Tool for Emergence

Michael J. North (Argonne National Laboratory, USA), Thomas R. Howe (The University of Chicago, USA), Nick Collier (Argonne National Laboratory, USA), Eric Tatara (The University of Chicago, USA), Jonathan Ozik (Argonne National Laboratory, USA) and Charles Macal (PantaRei Corporation, USA)
DOI: 10.4018/978-1-60566-236-7.ch023
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Abstract

Search has been recognized as an important technology for a wide range of software applications. Agentbased modelers often face search challenges both when looking for agents that need to be connected to one another and when seeking appropriate target agents while defining agent behaviors. This chapter presents an approach to simplifying such search problems and shows examples of its use. The approach presented in this chapter offers both imperative and declarative methods to find sets of agents with particular attributes in particular locales. The imperative approach allows for flexible reactions to the agents that are discovered through querying. The declarative approach builds on the imperative approach and introduces a temporal dimension to the process by explicitly allowing for searches that activate in the future depending on the conditions that obtain in a given model.
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Introduction

Search has been recognized as an important technology for a wide range of software applications. For example, Internet Society founding member and Google Chief Internet Evangelist Vint Cerf has stated that (Cerf 2007):

Today’s search engines draw the most relevant information to our attention, and as more data become available online, the importance of search engines will only increase. In the future, people around the world will likely look for new ways to identify the authenticity of online information sources.

According to Ntoulas et al. (2004):

As the Web grows larger and more diverse, search engines are becoming the “killer app” of the Web. Whenever users want to look up information, they typically go to a search engine, issue queries and look at the results. Recent studies confirm the growing importance of search engines. According to (ACNielsen 2004), for example, Web users spend a total of 13 million hours per month interacting with Google alone.

Search technologies are not just used by people for information retrieval. Software programs within automated Web services systems are also beginning to use search technologies to identify other programs to act as service providers. Liu et al. (2004) elaborate on this growing trend:

Web services are self-describing software applications that can be advertised, located, and used across the Internet using a set of standards such as SOAP [Simple Object Access Protocol], WSDL [Web Services Description Language], and UDDI [Universal Description Discovery and Integration] (Papazoglou and Georgakopoulos 2003). Web services encapsulate application functionality and information resources, and make them available through standard programmatic interfaces. Web services are viewed as one of the promising technologies that could help business entities to automate their operations on the Web on a large scale by automatic discovery and consumption of services. Business-to-Business (B2B) integration can be achieved on a demand basis by aggregating multiple services from different providers into a value-added composite service.

Liu et al. (2004) also state the following:

The emerging Service-Oriented Computing (SOC) paradigm promises to enable businesses and organizations to collaborate in an unprecedented way by means of standard Web services. To support rapid and dynamic composition of services in this paradigm, Web services that meet requesters’ functional requirements must be able to be located and bounded dynamically from a large and constantly changing number of service providers based on their Quality of Service (QoS).

Agent-based modelers and multi-agent simulationists often face similar challenges when specifying searches for groups of agents within models. This chapter, which builds on the discussion found in North et al. (October 2006c), addresses this issue by first considering the kinds of searches commonly found in agent-based models and multi-agent simulations. It then grounds the need for search in Holland’s properties and features of Complex Adaptive Systems (CAS) (1995). Building on this foundation, this chapter then introduces both Repast Simphony (Repast S) and the Repast S approach to simplifying many agent-based modeling and multi-agent simulation search problems. An example application of the search capability within Repast S is then provided. Finally, this chapter presents some conclusions.

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Background

Several kinds of searches appear to be common in agent-based models and multi-agent simulations, including queries for:

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Table of Contents
Foreword
Georgi Stojanov
Chapter 1
R. Keith Sawyer
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Chapter 2
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This chapter critically examines our theoretical understanding of the dialectical relationship between emergent social structures and agent... Sample PDF
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Chapter 3
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Social interaction represents a powerful new locus of research in the quest to build more truly human-like artificial agents. The work in this area... Sample PDF
Agents and Social Interaction: Insights from Social Psychology
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Chapter 4
M. Afzal Upal
This chapter will critically review existing approaches to the modeling transmission of cultural information and advocate a new approach based on a... Sample PDF
Predictive Models of Cultural Information Transmission
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Chapter 5
Jorge A. Romero
Despite the popularity of agents for the information technology infrastructure, questions remain because it is not clear what do e-business agents... Sample PDF
Interaction of Agent in E-Business: A Look at Different Sources
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Chapter 6
Adam J. Conover
This chapter presents a description of ongoing experimental research into the emergent properties of multi-agent communication in “temporally... Sample PDF
A Simulation of Temporally Variant Agent Interaction via Passive Inquiry
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Chapter 7
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Agent Feedback Messaging: A Messaging Infrastructure for Distributed Message Delivery
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Chapter 8
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Modeling Cognitive Agents for Social Systems and a Simulation in Urban Dynamics
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Chapter 9
Scott Watson, Kerstin Dautenhahn, Wan Ching (Steve) Ho, Rafal Dawidowicz
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Developing Relationships Between Autonomous Agents: Promoting Pro-Social Behaviour Through Virtual Learning Environments Part I
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Chapter 10
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Construction of Meanings in Biological and Artificial Agents
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Chapter 11
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Chapter 12
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The Generative Power of Signs: The Importance of the Autonomous Perception of Tags to the Strong Emergence of Institutions
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Chapter 13
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This chapter addresses the problem of the acquisition of the syntax of propositional logic. An approach based on general purpose cognitive... Sample PDF
Propositional Logic Syntax Acquisition Using Induction and Self-Organisation
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Chapter 14
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Hybrid Emotionally Aware Mediated Multiagency
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Chapter 15
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In this chapter, we give an overview of the results of a Human-Robot Interaction experiment, in a near zerocontext environment. We stimulate the... Sample PDF
Mapping Hybrid Agencies Through Multiagent Systems
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Chapter 16
Scott Watson, Kerstin Dautenhahn, Wan Ching (Steve) Ho, Rafal Dawidowicz
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Developing Relationships Between Autonomous Agents: Promoting Pro-Social Behaviour Through Virtual Learning Environments Part II
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Chapter 17
Mario Paolucci, Rosaria Conte
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Reputation: Social Transmission for Partner Selection
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Chapter 18
Adam J. Conover
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A Simulation of Temporally Variant Agent Interaction via Belief Promulgation
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Chapter 19
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Chapter 20
Eric Baumer, Bill Tomlinson
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Chapter 21
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Chapter 22
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Chapter 23
Michael J. North, Thomas R. Howe, Nick Collier, Eric Tatara, Jonathan Ozik, Charles Macal
Search has been recognized as an important technology for a wide range of software applications. Agentbased modelers often face search challenges... Sample PDF
Search as a Tool for Emergence
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