subject:(Virtual Coordinate Systems)

Colorado State University

1. Dhanapala, Dulanjalie C. Anchor centric virtual coordinate systems in wireless sensor networks: from self-organization to network awareness.

Degree: PhD, Electrical and Computer Engineering, 2012, Colorado State University

URL: http://hdl.handle.net/10217/71554

► Future Wireless Sensor Networks (WSNs) will be collections of thousands to millions of sensor nodes, automated to self-organize, adapt, and collaborate to facilitate distributed monitoring… (more)

▼ Future Wireless Sensor Networks (WSNs) will be collections of thousands to millions of sensor nodes, automated to self-organize, adapt, and collaborate to facilitate distributed monitoring and actuation. They may even be deployed over harsh geographical terrains and 3D structures. Low-cost sensor nodes that facilitate such massive scale networks have stringent resource constraints (e.g., in memory and energy) and limited capabilities (e.g., in communication range and computational power). Economic constraints exclude the use of expensive hardware such as Global Positioning Systems (GPSs) for network organization and structuring in many WSN applications. Alternatives that depend on signal strength measurements are highly sensitive to noise and fading, and thus often are not pragmatic for network organization. Robust, scalable, and efficient algorithms for network organization and reliable information exchange that overcome the above limitations without degrading the network's lifespan are vital for facilitating future large-scale WSN networks. This research develops fundamental algorithms and techniques targeting self-organization, data dissemination, and discovery of physical properties such as boundaries of large-scale WSNs without the need for costly physical position information. Our approach is based on Anchor Centric Virtual Coordinate Systems, commonly called Virtual Coordinate Systems (VCSs), in which each node is characterized by a coordinate vector of shortest path hop distances to a set of anchor nodes. We develop and evaluate algorithms and techniques for the following tasks associated with use of VCSs in WSNs: (a) novelty analysis of each anchor coordinate and compressed representation of VCSs; (b) regaining lost directionality and identifying a 'good' set of anchors; (c) generating topology preserving maps (TPMs); (d) efficient and reliable data dissemination, and boundary identification without physical information; and (f) achieving network awareness at individual nodes. After investigating properties and issues related to VCS, a Directional VCS (DVCS) is proposed based on a novel transformation that restores the lost directionality information in VCS. Extreme Node Search (ENS), a novel and efficient anchor placement scheme, starts with two randomly placed anchors and then uses this directional transformation to identify the number and placement of anchors in a completely distributed manner. Furthermore, a novelty-filtering-based approach for identifying a set of 'good' anchors that reduces the overhead and power consumption in routing is discussed. Physical layout information such as physical voids and even relative physical positions of sensor nodes with respect to X-Y directions are absent in a VCS description. Obtaining such information independent of physical information or signal strength measurements has not been possible until now. Two novel techniques to extract Topology Preserving Maps (TPMs) from VCS, based on Singular Value Decomposition (SVD) and DVCS are presented. A TPM is a distorted… Advisors/Committee Members: Jayasumana, Anura P. (advisor), Kirby, Michael (committee member), Pezeshki, Ali (committee member), Ray, Indrakshi (committee member).

Subjects/Keywords: network awareness; phenomena discovery; routing; sensor networks; topology preserving maps; virtual coordinate systems

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APA (6^th Edition):

Dhanapala, D. C. (2012). Anchor centric virtual coordinate systems in wireless sensor networks: from self-organization to network awareness. (Doctoral Dissertation). Colorado State University. Retrieved from http://hdl.handle.net/10217/71554

Chicago Manual of Style (16^th Edition):

Dhanapala, Dulanjalie C. “Anchor centric virtual coordinate systems in wireless sensor networks: from self-organization to network awareness.” 2012. Doctoral Dissertation, Colorado State University. Accessed April 21, 2021. http://hdl.handle.net/10217/71554.

MLA Handbook (7^th Edition):

Dhanapala, Dulanjalie C. “Anchor centric virtual coordinate systems in wireless sensor networks: from self-organization to network awareness.” 2012. Web. 21 Apr 2021.

Vancouver:

Dhanapala DC. Anchor centric virtual coordinate systems in wireless sensor networks: from self-organization to network awareness. [Internet] [Doctoral dissertation]. Colorado State University; 2012. [cited 2021 Apr 21]. Available from: http://hdl.handle.net/10217/71554.

Council of Science Editors:

Dhanapala DC. Anchor centric virtual coordinate systems in wireless sensor networks: from self-organization to network awareness. [Doctoral Dissertation]. Colorado State University; 2012. Available from: http://hdl.handle.net/10217/71554

University of Florida

2. Hunt, William C. A Computer-Based Simulation for Training Dental Preparation.

Degree: MS, Computer Engineering - Computer and Information Science and Engineering, 2012, University of Florida

URL: https://ufdc.ufl.edu/UFE0044204

► We present a low-cost VR simulation environment for dental students that allows trainees to practice dental preparation. The trainee haptically interacts with a virtual tooth,… (more)

Subjects/Keywords: College students; Coordinate systems; Data models; Dental models; Drilling; Maps; Simulations; Teeth; Tooth enamel; Virtual reality; dental – drilling – graphics – haptic – preparation – simulation – training – virtual

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Hunt, W. C. (2012). A Computer-Based Simulation for Training Dental Preparation. (Masters Thesis). University of Florida. Retrieved from https://ufdc.ufl.edu/UFE0044204

Chicago Manual of Style (16^th Edition):

Hunt, William C. “A Computer-Based Simulation for Training Dental Preparation.” 2012. Masters Thesis, University of Florida. Accessed April 21, 2021. https://ufdc.ufl.edu/UFE0044204.

MLA Handbook (7^th Edition):

Hunt, William C. “A Computer-Based Simulation for Training Dental Preparation.” 2012. Web. 21 Apr 2021.

Vancouver:

Hunt WC. A Computer-Based Simulation for Training Dental Preparation. [Internet] [Masters thesis]. University of Florida; 2012. [cited 2021 Apr 21]. Available from: https://ufdc.ufl.edu/UFE0044204.

Council of Science Editors:

Hunt WC. A Computer-Based Simulation for Training Dental Preparation. [Masters Thesis]. University of Florida; 2012. Available from: https://ufdc.ufl.edu/UFE0044204

Brno University of Technology

3. Smrčka, Lukáš. Lokalizace stanic v Internetu pomocí systému Lighthouses: Localization of nodes in Internet using Lighthouses system.

Degree: 2018, Brno University of Technology

URL: http://hdl.handle.net/11012/4510

► The thesis is focused on the localization of stations in the Internet with the help of artificial coordinate systems. These systems can be used to… (more)

Subjects/Keywords: Predikce zpoždění; umělé souřadnicové systémy; Vivaldi; King; GNP; Lighthouses; PlanetLab.; Prediction delays; virtual coordinate based location systems; Vivaldi; King; GNP; Lighthoueses; PlanetLab.

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Smrčka, L. (2018). Lokalizace stanic v Internetu pomocí systému Lighthouses: Localization of nodes in Internet using Lighthouses system. (Thesis). Brno University of Technology. Retrieved from http://hdl.handle.net/11012/4510

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Smrčka, Lukáš. “Lokalizace stanic v Internetu pomocí systému Lighthouses: Localization of nodes in Internet using Lighthouses system.” 2018. Thesis, Brno University of Technology. Accessed April 21, 2021. http://hdl.handle.net/11012/4510.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Smrčka, Lukáš. “Lokalizace stanic v Internetu pomocí systému Lighthouses: Localization of nodes in Internet using Lighthouses system.” 2018. Web. 21 Apr 2021.

Vancouver:

Smrčka L. Lokalizace stanic v Internetu pomocí systému Lighthouses: Localization of nodes in Internet using Lighthouses system. [Internet] [Thesis]. Brno University of Technology; 2018. [cited 2021 Apr 21]. Available from: http://hdl.handle.net/11012/4510.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Smrčka L. Lokalizace stanic v Internetu pomocí systému Lighthouses: Localization of nodes in Internet using Lighthouses system. [Thesis]. Brno University of Technology; 2018. Available from: http://hdl.handle.net/11012/4510

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Florida

4. Ganguly, Arijit. Self-Managing Virtual Networks for Wide-Area Distributed Computing.

Degree: PhD, Computer Engineering - Computer and Information Science and Engineering, 2008, University of Florida

URL: https://ufdc.ufl.edu/UFE0022657

► Sharing of computing and storage resources among different institutions and individuals connected over the Internet is seen as a solution to meet the ever-increasing computation… (more)

▼ Sharing of computing and storage resources among different institutions and individuals connected over the Internet is seen as a solution to meet the ever-increasing computation and storage demands of modern applications. Several factors curtail the ability of existing applications to run seamlessly on Wide-area Networks (WANs): heterogeneous resource configurations, obscured access to resources due to Network Address Translators (NATs) and firewalls, inability to express sharing policies and lack of isolation provided by operating systems. This work addresses the problem of providing bi-directional network connectivity among wide-area resources behind NATs and firewalls. At the core of the presented approach is a self-managing networking infrastructure (IPOP) that aggregates wide-area hosts into a private network with decoupled address space management, and is functionally equivalent to a Local-area network (LAN) environment where a wealth of existing, unmodified IP-based applications can be deployed. The IPOP virtual network tunnels the traffic generated by applications over a P2P-based overlay network, which handles NAT/firewall traversal (through hole-punching techniques) and dynamically adapts its topology (through establishment of direct connections between communicating nodes) in a self-organized, decentralized manner. Together with classic virtual machine technology for software dissemination, IPOP facilitates deployment of large-scale distributed computing environments on wide-area hosts owned by different organization and individuals. A real deployment of the system has been up and running for more than one year, providing access to computational resources for several users. This dissertation makes the following contributions in the area of virtualization applied to wide-area networks: a novel self-organizing IP-over-P2P system with decentralized NAT traversal; decentralized self-optimization techniques to create overlay links between nodes based on traffic inspection; creation of isolated address spaces and decentralized allocation of IP addresses within each such address space using Distributed Hash Tables (DHTs); tunneling of overlay links for maintaining the overlay structure even in presence of NATs and routing outages; and techniques for proxy discovery for tunnel nodes using network coordinates. I describe the IPOP virtual network architecture and present an evaluation of a prototype implementation using well-known network performance benchmarks and a set of distributed applications. To further facilitate deployment of IPOP, I describe techniques that allow new users to easily create and manage isolated address spaces and decentralized allocation of IP addresses within each such address space. I present generally applicable techniques that facilitate consistent routing in structured P2P systems even in presence of overlay faults, thereby benefiting different applications of these systems. In the context of the IPOP system, these techniques provide improved virtual IP connectivity. I also describe and… Advisors/Committee Members: Figueiredo, Renato J. (committee chair), Fortes, Jose A. (committee member), Newman, Richard E. (committee member), George, Alan D. (committee member), Avery, Paul R. (committee member).

Subjects/Keywords: Connectivity; Coordinate systems; Identifiers; Internet; Munchausen syndrome by proxy; Preliminary proxy material; Proxy reporting; Proxy statements; Tunnels; Uniform resource identifiers; dht, firewalls, grid, nat, networks, p2p, virtual

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Ganguly, A. (2008). Self-Managing Virtual Networks for Wide-Area Distributed Computing. (Doctoral Dissertation). University of Florida. Retrieved from https://ufdc.ufl.edu/UFE0022657

Chicago Manual of Style (16^th Edition):

Ganguly, Arijit. “Self-Managing Virtual Networks for Wide-Area Distributed Computing.” 2008. Doctoral Dissertation, University of Florida. Accessed April 21, 2021. https://ufdc.ufl.edu/UFE0022657.

MLA Handbook (7^th Edition):

Ganguly, Arijit. “Self-Managing Virtual Networks for Wide-Area Distributed Computing.” 2008. Web. 21 Apr 2021.

Vancouver:

Ganguly A. Self-Managing Virtual Networks for Wide-Area Distributed Computing. [Internet] [Doctoral dissertation]. University of Florida; 2008. [cited 2021 Apr 21]. Available from: https://ufdc.ufl.edu/UFE0022657.

Council of Science Editors:

Ganguly A. Self-Managing Virtual Networks for Wide-Area Distributed Computing. [Doctoral Dissertation]. University of Florida; 2008. Available from: https://ufdc.ufl.edu/UFE0022657

5. Becker, Sheila. Conceptual Approaches for Securing Networks and Systems.

Degree: 2012, Université du Luxembourg

URL: http://orbilu.uni.lu/handle/10993/15413

► Peer-to-peer real-time communication and media streaming applications optimize their performance by using application-level topology estimation services such as virtual coordinate systems. Virtual coordinate systems allow… (more)

Subjects/Keywords: Security; Virtual Coordinate Systems; Frog-Boiling; Game Theory; Machine Learning; Engineering, computing & technology :: Computer science [C05]; Ingénierie, informatique & technologie :: Sciences informatiques [C05]

…those virtual coordinate systems, can degrade vastly the performance and accuracy of such… …systems. In virtual coordinate systems nodes have to report their location and the round-trip… …virtual coordinate systems. 2.1 Context and Motivation The beginning on building virtual… …virtual coordinates systems have been developed as an overlay network that implements location… …awareness. In these systems, nodes obtain coordinates in a virtual space based on the relation of…

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Becker, S. (2012). Conceptual Approaches for Securing Networks and Systems. (Doctoral Dissertation). Université du Luxembourg. Retrieved from http://orbilu.uni.lu/handle/10993/15413

Chicago Manual of Style (16^th Edition):

Becker, Sheila. “Conceptual Approaches for Securing Networks and Systems.” 2012. Doctoral Dissertation, Université du Luxembourg. Accessed April 21, 2021. http://orbilu.uni.lu/handle/10993/15413.

MLA Handbook (7^th Edition):

Becker, Sheila. “Conceptual Approaches for Securing Networks and Systems.” 2012. Web. 21 Apr 2021.

Vancouver:

Becker S. Conceptual Approaches for Securing Networks and Systems. [Internet] [Doctoral dissertation]. Université du Luxembourg; 2012. [cited 2021 Apr 21]. Available from: http://orbilu.uni.lu/handle/10993/15413.

Council of Science Editors:

Becker S. Conceptual Approaches for Securing Networks and Systems. [Doctoral Dissertation]. Université du Luxembourg; 2012. Available from: http://orbilu.uni.lu/handle/10993/15413

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