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identified for example.UserUsesNavigation SystemWeb browserConnects toSends navigationassistance contentApplicationWeb pageWeb pageWeb ServerWritesAccessesRepositoryWeb pageWeb pageServerLogReadsThe Navigation System6.2 Consequences on the applicationThe Access Monitor agent is a “web log monitor”. It senses its environment by reading thelines in the web log.Another consequence is the way navigation assistance is provided. As the user’s accessprogram is a web browser, a possibility is to dynamically modify the web page viewed by theuser in order to incorporate the assistance data in the form of additional web content. Forexample, there could be an additional frame on top of the original web page. This should bedone at the level of the web server. An alternative is to use a dedicated plug-in for the webbrowser. Assistance is then displayed in a specific part of the browser window. In all thecases, the nodes of the assistance graph can be actual web anchors that can be clicked forimmediate navigation. However, this issue has not been fully investigated so no decision hasbeen made yet. In a first development, the application can just display assistance in a textformat on the application’s machine.MSc EMOOSE Thesis – http://www.emn.fr/EMOOSE 37
Chapter 4: Implementation1 Implementation strategyThe application has been designed as a multiagent system. Agents need an infrastructure thatenables them to live and interact. On top of that layer, an agent framework provides an agentdesign and tools for implementing agents. Both layers together can be called the AgentSystem.ApplicationAgent FrameworkAgent InfrastructureAgent SystemImplementation layersTherefore, the Agent System must be obtained first. Generic, mature agent systems alreadyexist and are freely available. However, a constraint on the application is that it runs under theMicrosoft .Net environment.A good solution for rapid prototyping is to use an already existing platform and tools.However, as .Net is very recent, no agent platform has been found that has been created for.Net. Almost all the existing agent platforms are implemented in Java. A strategy has thus tobe chosen for solving the problem.- A first strategy consists in keeping the Java code and try to run it under .Net. The J#plugin for VisualStudio makes it possible to execute J# code under .Net. Microsoft J#is very close to Sun’s Java language, however it is not compatible with features laterthan JDK 1.1.4. Among the agent platforms, only FIPA-OS is provided as a JDK1.1.xcompliantversion. Although its source code is compatible with J# .Net, it makes useof 7 external Java libraries (e.g. Xerces, Swing, Java2 Collections) that have to beincorporated as source code as well, which sometimes requires to decompile bytecode(e.g. with JAD [79]). Finally, in addition to decompiling problems, it appears that sucha .Net project cannot work because of the absence of RMI in J#.- Another strategy is to convert all the Java code to C# using Microsoft’s JUMP pack.However, the current version of JUMP is Beta 2 at this time and it is not completeenough to provide a satisfactory solution.- A third possibility is to make .Net cooperate with a Java Virtual Machine at run-time.This can be done by using web services and exchanging XML or by wrapping Javaobjects into COM components by the mean of tools like J-Integra [80]. Nonetheless,in addition to being complicated, this solution allows only for the exchange of data orobjects and not the reuse of classes.MSc EMOOSE Thesis – http://www.emn.fr/EMOOSE 38
Page 1: Vrije Universiteit Brussel - Belgiu
Page 4 and 5: ContentsAbstract 1Acknowledgements
Page 6 and 7: (4) Table UP_SUP (matches User Prof
Page 9 and 10: content providers’ interpretation
Page 11 and 12: - Active profiling consists in aski
Page 13 and 14: 2 Agents2.1 Overview2.1.1 Definitio
Page 15 and 16: (1) each agent has incomplete infor
Page 17 and 18: MASs need an organization for speci
Page 19 and 20: However, the usefulness of personal
Page 21 and 22: they often provide implementation o
Page 23 and 24: 2.5 Design2.5.1 The DIMA designIn [
Page 25 and 26: 3 MetadataDuring the earlier invest
Page 27 and 28: This requires some agreement and st
Page 29 and 30: 4 PerspectivesRecommender systems m
Page 31 and 32: way Lego blocks should be assembled
Page 33 and 34: usiness intelligence is generated.
Page 35 and 36: important than memory space optimiz
Page 37: The graph is then formatted to be v
Page 41 and 42: (1) A Name Server (NS) maps every a
Page 43 and 44: the agent terminates, the thread is
Page 45 and 46: 4 Application level4.1 OverviewThe
Page 47 and 48: 4.3 User Agent MakerThis agent has
Page 49 and 50: Thus the profile, node and link cla
Page 51 and 52: BIProviderR : Provide_Business_Inte
Page 53 and 54: to enable users to explicitly speci
Page 55 and 56: ConclusionA “minimalist” approa
Page 57 and 58: Appendix A: Addendum onIndustrial I
Page 59 and 60: Appendix B: SQL Tables Design1 Tabl
Page 61 and 62: Appendix C: Conference PaperA paper
Page 63 and 64: very large repositories of learning
Page 65 and 66: popularity of the link (the bigger
Page 67 and 68: Appendix D: Source Code1 Agent infr
Page 69 and 70: public static bool ProcessIsMainHos
Page 71 and 72: string path = MakePath(".", Middlew
Page 73 and 74: System.Messaging.MessageQueue queue
Page 75 and 76: public static NameServer GetNS(){if
Page 77 and 78: }}}table[agentId] = address;}}/// /
Page 79 and 80: ****** NON-STATIC PART ******// Tab
Page 82 and 83: }}}return (AgentId) first;using Sys
Page 85 and 86: {}return Subject.GetHashCode() + Na
Page 87 and 88: name in order to allow for the retr
Page 89 and 90:
}// Start agent's main Thread.Threa
Page 91 and 92:
}DirectoryFacilitator.GetDF().Unreg
Page 93 and 94:
{/// /// Allows for specific conver
Page 95 and 96:
}Monitor.Exit(aLock);public overrid
Page 97 and 98:
Allows for synchronized Message exc
Page 99 and 100:
esource./// /// public string GetMa
Page 101 and 102:
}}private void RunTerminationExamin
Page 103 and 104:
}private Message RequestUACreation(
Page 105 and 106:
}msgQueue.AddFilters(new MessageCat
Page 107 and 108:
Message received: interrupt preterm
Page 109 and 110:
19. Class Architecture.DBManagerAg
Page 111 and 112:
}}connection.Close();/// /// For sa
Page 113 and 114:
using System.Collections;namespace
Page 115 and 116:
namespace Architecture.Profiles{usi
Page 117 and 118:
private UP(DataRow row) : this(newU
Page 119 and 120:
}DataRow[] rows = Row.GetChildRows(
Page 121 and 122:
}adapter.Update(Data);//***********
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internal static readonly string LAS
Page 125 and 126:
}}Row[OCCURRENCES] = Occurrences +
Page 127 and 128:
}get{}return Data.Rows.Find(_name);
Page 129 and 130:
private static SqlDataAdapter adapt
Page 131 and 132:
}foreach (ILink link in links){if (
Page 133 and 134:
}}}private DataRow Row{get{return D
Page 135 and 136:
18. N. Good, et al. Combining colla
Page 137 and 138:
49. D. Derbyshire, et al., Agent-Ba
Page 139:
83. Council for Higher Education Ac
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