Mitre Corporation

About: Mitre Corporation is a company organization based out in Bedford, Massachusetts, United States. It is known for research contribution in the topics: Air traffic control & National Airspace System. The organization has 4884 authors who have published 6053 publications receiving 124808 citations. The organization is also known as: Mitre & MITRE.

Identifying Evolving Groups in Dynamic Multimode Networks

Abstract: A multimode network consists of heterogeneous types of actors with various interactions occurring between them. Identifying communities in a multimode network can help understand the structural properties of the network, address the data shortage and unbalanced problems, and assist tasks like targeted marketing and finding influential actors within or between groups. In general, a network and its group structure often evolve unevenly. In a dynamic multimode network, both group membership and interactions can evolve, posing a challenging problem of identifying these evolving communities. In this work, we try to address this problem by employing the temporal information to analyze a multimode network. A temporally regularized framework and its convergence property are carefully studied. We show that the algorithm can be interpreted as an iterative latent semantic analysis process, which allows for extensions to handle networks with actor attributes and within-mode interactions. Experiments on both synthetic data and real-world networks demonstrate the efficacy of our approach and suggest its generality in capturing evolving groups in networks with heterogeneous entities and complex relationships.

Inside CORBA: Distributed Object Standards and Applications

Abstract: List of Figures and Tables. Foreword. Preface. I. CORBA BASICS 1. An Introduction to Corba. Information Systems: From the Back Room to the Front Office. Analyzing the Scenario. Challenges in System Development. System Integration. Managing the Future. Technology Availability. Corba Overview. Corba Concepts. The Object Model. Open Distributed Computing Environment. Component Integration and Reuse. Corba's Growth. What You Will Learn From This Book. II. CORBA STANDARDS 2. Corba Interface Definition Language (Idl). An Overview of Corbaidl. The Most Significant Element of Corba is the Interface Definition Language. Omg Idl is a Stable Standard. One Idl File Creates Multiple Language Bindings. Idl Enables Platform Independence. Idl is Pure Specification, Not Implementation. The Quality of Idl Designs is Critically Important. An Idl Tutorial. Idl Modules. Idl Interfaces. Idl Forward. Idl Constants. Idl Type Declaration. Idl Sequences. The Dynamic Idl Type Any. Idl Attributes. Idl Exceptions. Idl Operation Signatures. Pre-Compiler Directives. Conversion of Oo Designs to Idl. From Oo Design to Idl Example: Course Registration Object Model. The Oo Design. An Abstract Idl Representation. A Concrete Idl Representation. Idl Guidelines. Idl Identifiers. Parameter and Return Values. The Use of Attributes. Use of Type Any. Idl Modules. Idl Documentation. Concluding Remarks. 3. The Corba 2 Standard. An Overview of Corba 2. The Orb. Corba Core. Standard Object Model. Interface Attributes and Operations. One-Way Keyword. Exception Handling. Context Clause. Object Implementation. The Corba Architecture. Static Interfaces. Static and Dynamic Skeletons. Static Versus Dynamic Invocation. Corba Clients and Object Implementations. Local Objects. Marshaling. Orb Libraries. Client Invocation Process. Invocation Scenario. Interface and Implementation Repositories. Interface Repository and Idl Object Models. Applications of the Interface Repository. Language Mappings. C Language Mapping. C11 Language Mapping. Variable Type and Pointer Type. Smalltalk Language Mapping. Java Language Mapping. Portability. Interoperability and Ole Integration. Corba Interoperability. Corba and Microsoft. Corba Guidelines. Location Transparency. Rely On the Corba Standard, Not the Orb Products. Use of Standards. Concluding Remarks. 4. Corbaservices. An Overview of Corbaservices. Many Application Developers Have Reinvented the Corbaservices. Considering Vendor Support Self-Building These Services. The Corbaservices Architecture. The Corbaservices Roadmap. The Information Management Services. The Property Service. The Relationship Service. Multithreaded Environments. The Query Service. The Externalization Service. The Persistent Object Service. The Collection Service. Task Management Corbaservices. The Events Service. The Concurrency Service. The Transaction Service. System Management Corbaservices. The Naming Service. The Lifecycle Service. The Licensing Service. The Trader Service. Infrastructure Corbaservices. Security and Time Services. Messaging Service. The Future of Corbaservices. Additional Services. Concluding Remarks. 5. Corbafacilities and Corbadomains. Overview of Corbafacilities. Corbafacilities Versus Corbaservices. Horizontal Corbafacilities. Distributed Document Component Facility. Compound Linking. Opendoc Parts Framework. Opendoc User Interface. Opendoc Framework Objects. The Common Management Facilities. Internationalization and Time Operations Facilities. Data Interchange Facility. Vertical Corbafacilities and Related Activities. Business Object Framework and Common Business Objects. Meta-Object Facility. Printing and Method Facilities Input. Vertical-Market Areas. Leveraging the Omg Process. Exploiting a Predictable Process. Application Profiles. Inside the Omg Organization. The Request for Information Process. Creating Architectures and Roadmaps. Rfp Adoption Processes. III. CORBA SYSTEM ENGINEERING 6. Relationships With Other Technologies. Choosing a Distributed Object Architecture. Analyzing the Scenario. Making an Informed Decision. The Role of Standards. The Underpinnings of Distributed Architectures. Comparing Distributed Architectures. Osf's Distributed Computing Environment. Microsoft's Distributed Component Object Model. Javasoft's Java and the Remote Method Invocation (Rmi). Interoperability With Corba. Corba Selection and Application. Corba Product Selection. Issues in the Effective Application of Corba. 7. The Corba Migration Process. Migrating to a Corba Architecture. Analyzing the Scenario. Enterprise Migration. Architecture-Driven Migration. Conformance Between Architecture and Implementation. Migration to Commonality. Migration Strategy. 8. Corba and Software Architecture. Defining a Software Architecture. Analyzing the Scenario. The Role of Architecture in Software. If Software Architecture is so Important, What is it? The Elements of Good Software Architecture. Corba and Software Architecture. Models of Use for Corba in a Software Architecture. Applying Corba to Software Architecture. The Scope of a Software Architecture. The Major Entities of Software Architecture. Customizing the Software Architecture to the Organization. Software Architecture Design. Architecture Abstraction. The Process for Software Architecture Design. Defining the Software Architecture Objects and Interfaces. Other Software Architecture Considerations. Software Architecture Conclusions. 9. Application Design Using Software Architecture. Designing the Application. Analyzing the Scenario. The Relationship of Architecture to Program Planning. Recognizing the Learn-As-You-Go Process. Prototype Development Using Corba. Creating a Successful Environment. Applying the Software Architecture to Application Design. Selection of Application Components. Designing Application Component Interfaces. Defining Component Relationships. Designing for Interoperability. Increasing Reuse. Making the Most of Inheritance. Providing Good Exception Handling. Test and Evaluation of the System. Corba in the Operations and Maintenance Phase. Measuring Progress. Measuring the Progress of the Software Architecture. Tying it All Together: Architecture and Application Design Processes. Collaborative Processes for Architecture and Application Development. Corba Architecture Process-the Analysis Steps. Corba Architecture Process-the Definition Steps. Corba Application Development Process. 10. Corba Migration Case Study: The Information Access Facility. Problem and Objective. Standards-Based Profiles. Project Context. Business Objects and Process. Interface Migration. Conclusions. Do Not Design in a Vacuum. Design for Quality. Epilogue. Appendix A. Omg Idl Grammar. Appendix B. Omg Idl Definitions From Corba 2. Appendix C. IDL for Corbaservices. Appendix D. Guide to CORBA Resources. Bibliography. Acronyms. Index. 0201895404T04062001

A position-based multi-zone routing protocol for wide area mobile ad-hoc networks

Abstract: We propose a proactive, position-based routing protocol that provides an alternative, simplified way of localizing routing information overhead, without having to resort to complex, multiple-tier hierarchical routing organization schemes. This is achieved by integrating the functions of routing and mobility management via the use of geographic position, and the generalization of the routing zone concept. The proposed protocol controls routing overhead generation and propagation by making the overhead generation rate and propagation distance directly proportional to the amount of change in a node's geographic position. In our protocol, a set of geographic routing zones is defined for each node, where the purpose of the ith routing zone is to contain propagation of position updates advertising position differentials equal to the radius of the (i-l)th routing zone. Finally, we show through simulation that the proposed routing protocol is a bandwidth-efficient routing mechanism that can be applied across large scale networks.

The form is the substance: classification of genres in text

Abstract: Categorization of text in IR has traditionally focused on topic. As use of the Internet and e-mail increases, categorization has become a key area of research as users demand methods of prioritizing documents. This work investigates text classification by format style, i.e. "genre", and demonstrates, by complementing topic classification, that it can significantly improve retrieval of information. The paper compares use of presentation features to word features, and the combination thereof, using Naive Bayes, C4.5 and SVM classifiers. Results show use of combined feature sets with SVM yields 92% classification accuracy in sorting seven genres.