Finding and Mitigating Geographic Vulnerabilities in Mission Critical Multi-Layer Networks

Title from PDF of title page, viewed on June 20, 2016Dissertation advisor: Cory BeardVitaIncludes bibliographical references (pages 232-257)Thesis(Ph.D.)--School of Computing and Engineering. University of Missouri--Kansas City, 2016In Air Traffic Control (ATC), communications outages may lead to immediate loss of communications or radar contact with aircraft. In the short term, there may be safety related issues as important services including power systems, ATC, or communications for first responders during a disaster may be out of service. Significant financial damage from airline delays and cancellations may occur in the long term. This highlights the different types of impact that may occur after a disaster or other geographic event. The question is How do we evaluate and improve the ability of a mission-critical network to perform its mission during geographically correlated failures? To answer this question, we consider several large and small networks, including a multi-layer ATC Service Oriented Architecture (SOA) network known as SWIM. This research presents a number of tools to analyze and mitigate both long and short term geographic vulnerabilities in mission critical networks. To provide context for the tools, a disaster planning approach is presented that focuses on Resiliency Evaluation, Provisioning Demands, Topology Design, and Mitigation of Vulnerabilities. In the Resilience Evaluation, we propose a novel metric known as the Network Impact Resilience (NIR) metric and a reduced state based algorithm to compute the NIR known as the Self-Pruning Network State Generation (SP-NSG) algorithm. These tools not only evaluate the resiliency of a network with a variety of possible network tests, but they also identify geographic vulnerabilities. Related to the Demand Provisioning and Mitigation of Vulnerabilities, we present methods that focus on provisioning in preparation for rerouting of demands immediately following an event based on Service Level Agreements (SLA) and fast rerouting of demands around geographic vulnerabilities using Multi-Topology Routing (MTR). The Topology Design area focuses on adding nodes to improve topologies to be more resistant to geographic vulnerabilities. Additionally, a set of network performance tools are proposed for use with mission critical networks that can model at least up to 2nd order network delay statistics. The first is an extension of the Queueing Network Analyzer (QNA) to model multi-layer networks (and specifically SOA networks). The second is a network decomposition tool based on Linear Algebraic Queueing Theory (LAQT). This is one of the first extensive uses of LAQT for network modeling. Benefits, results, and limitations of both methods are described.Introduction -- SWIM Network - Air traffic Control example -- Performance analysis of mission critical multi-layer networks -- Evaluation of geographically correlated failures in multi-layer networks -- Provisioning and restoral of mission critical services for disaster resilience -- Topology improvements to avoid high impact geographic events -- Routing of mission critical services during disasters -- Conclusions and future research -- Appendix A. Pub/Sub simulation model description -- Appendix B. ME Random Number Generatio

Nebraska Intellectual Freedom Manual

Much has changed in libraries and society since the publication of the 2004 revision of the Nebraska Library Association Intellectual Freedom Manual. The consensus of the current members of the Nebraska Library Association round table on Intellectual Freedom (NLA IF) was not to just revise the former manual, but to create an entirely new edition. In doing so, the authors have addressed a number of new issues. The intention was to keep it relatively brief but still useful. Readers should be able to read sections independent of one another for quick reference on topics of interest. For readers of the electronic version, there are many hyperlinks included. Though this is a new edition, the introduction to the 2004 revision still applies: As librarians, we are all concerned with the concept of intellectual freedom. It is our professional obligation to provide varied forms of information that meet the varied interests and needs of our community members. It is also our professional obligation to oppose the efforts of those who would attempt to monitor, challenge, change, or remove the materials of choice in our society. This handbook provides access to relevant resources for all librarians who may face a censorship challenge. Included are interpretations from the Library Bill of Rights, policies and procedures, examples of useful forms, and a list of library related organizations that may be contacted for further information. For additional information, readers are encouraged to consult the latest edition of the American Library Association (ALA) Intellectual Freedom Manual, as well as manuals from other U.S. states\u27 library organizations. A companion to the ALA manual is available online at http://www.ifmanual.org/ . For current information about intellectual freedom issues in Nebraska, visit the NLA IF website.https://digitalcommons.unl.edu/zeabook/1044/thumbnail.jp

Nebraska Intellectual Freedom Manual

Much has changed in libraries and society since the publication of the 2004 revision of the Nebraska Library Association Intellectual Freedom Manual. The consensus of the current members of the Nebraska Library Association round table on Intellectual Freedom (NLA IF) was not to just revise the former manual, but to create an entirely new edition. In doing so, the authors have addressed a number of new issues. The intention was to keep it relatively brief but still useful. Readers should be able to read sections independent of one another for quick reference on topics of interest. For readers of the electronic version, there are many hyperlinks included. Though this is a new edition, the introduction to the 2004 revision still applies: As librarians, we are all concerned with the concept of intellectual freedom. It is our professional obligation to provide varied forms of information that meet the varied interests and needs of our community members. It is also our professional obligation to oppose the efforts of those who would attempt to monitor, challenge, change, or remove the materials of choice in our society. This handbook provides access to relevant resources for all librarians who may face a censorship challenge. Included are interpretations from the Library Bill of Rights, policies and procedures, examples of useful forms, and a list of library related organizations that may be contacted for further information. For additional information, readers are encouraged to consult the latest edition of the American Library Association (ALA) Intellectual Freedom Manual, as well as manuals from other U.S. states\u27 library organizations. A companion to the ALA manual is available online at http://www.ifmanual.org/ . For current information about intellectual freedom issues in Nebraska, visit the NLA IF website.https://digitalcommons.unl.edu/zeabook/1044/thumbnail.jp

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