Now showing items 50-69 of 108

    • GeoQuorums: Implementing Atomic Memory in Mobile Ad Hoc Networks 

      Dolev, Shlomi; Gilbert, Seth; Lynch, Nancy A.; Shvartsman, Alex A.; Welch, Jennifer L. (2004-02-25)
      We present a new approach, the GeoQuorums approach, for implementing atomic read/write shared memoryin mobile ad hoc networks. Our approach is based on associating abstract atomic objects with certain geographiclocations. ...
    • How to Color a French Flag: Biologically Inspired Algorithms for Scale-Invariant Patterning 

      Ancona, B; Bajwa, A; Lynch, N; Mallmann-Trenn, F (Springer International Publishing, 2020)
      © 2020, Springer Nature Switzerland AG. In the French flag problem, initially uncolored cells on a grid must differentiate to become blue, white or red. The goal is for the cells to color the grid as a French flag, i.e., ...
    • Impossibility of boosting distributed service resilience 

      Attie, Paul; Guerraoui, Rachid; Kouznetsov, Petr; Lynch, Nancy; Rajsbaum, Sergio (2005-02-25)
      We prove two theorems saying that no distributed system in whichprocesses coordinate using reliable registers and f-resilient servicescan solve the consensus problem in the presence of f+1 undetectableprocess stopping ...
    • Information-Theoretic Lower Bounds on the Storage Cost of Shared Memory Emulation 

      Cadambe, Viveck R.; Wang, Zhiying; Lynch, Nancy (Association for Computing Machinery (ACM), 2016-07)
      © 2016 ACM. The focus of this paper is to understand storage costs of em- ulating an atomic shared memory over an asynchronous, dis- tributed message passing system. Previous literature has de- veloped several shared memory ...
    • A Layered Architecture for Erasure-Coded Consistent Distributed Storage 

      Konwar, Kishori M.; Prakash, N.; Lynch, Nancy; Médard, Muriel (ACM, 2017-07-25)
      © 2017 Association for Computing Machinery. Motivated by emerging applications to the edge computing paradigm, we introduce a two-layer erasure-coded fault-tolerant distributed storage system offering atomic access for ...
    • Leader Election Using Loneliness Detection 

      Ghaffari, Mohsen; Lynch, Nancy; Sastry, Srikanth (2011-10-12)
      We consider the problem of leader election (LE) in single-hop radio networks with synchronized time slots for transmitting and receiving messages. We assume that the actual number n of processes is unknown, while the size ...
    • Leader election using loneliness detection 

      Ghaffari, Mohsen; Lynch, Nancy Ann; Sastry, Srikanth (Springer-Verlag, 2012-06-26)
      We consider the problem of leader election (LE) in single-hop radio networks with synchronized time slots for transmitting and receiving messages. We assume that the actual number n of processes is unknown, while the size ...
    • A Local Broadcast Layer for the SINR Network Model 

      Halldorsson, Magnus M.; Holzer, Stephan Sebastian; Lynch, Nancy Ann (Association for Computing Machinery (ACM), 2015-07)
      We present the first algorithm that implements an abstract MAC (absMAC) layer in the Signal-to-Interference-plus-Noise-Ratio (SINR) wireless network model. We first prove that efficient SINR implementations are not possible ...
    • MAC Design for Analog Network Coding 

      Khabbazian, Majid; Kuhn, Fabian; Lynch, Nancy; Medard, Muriel; ParandehGheibi, Ali (2010-08-02)
      Most medium access control mechanisms discard collided packets and consider interference harmful. Recent work on Analog Network Coding (ANC) suggests a different approach, in which multiple interfering transmissions are ...
    • MAC Design for Analog Network Coding 

      Khabbazian, Majid; Kuhn, Fabian; Lynch, Nancy Ann; Medard, Muriel; Parandehgheibi, Ali (Association for Computing Machinery (ACM), 2011-06)
      Most medium access control (MAC) mechanisms discard collided packets and consider interference harmful. Recent work on Analog Network Coding (ANC) suggests a different approach, in which multiple interfering transmissions ...
    • Microelectronic Devices and Circuits - 2006 Electronic Edition 

      Fonstad, Clifton (2006-10-01)
      Combining semiconductor device physics and modeling with electronic circuit analysis and practice in a single sophomore/junior level microelectronics course, this textbook offers an integrated approach so students can truly ...
    • Modeling Computational Security in Long-Lived Systems, Version 2 

      Lynch, Nancy; Pereira, Olivier; Kaynar, Dilsun; Cheung, Ling; Canetti, Ran (2008-11-22)
      For many cryptographic protocols, security relies on the assumption that adversarial entities have limited computational power. This type of security degrades progressively over the lifetime of a protocol. However, some ...
    • Modeling Radio Networks 

      Lynch, Nancy; Newport, Calvin (2009-06-04)
      We describe a modeling framework and collection of foundational composition results for the study of probabilistic distributed algorithms in synchronous radio networks. Existing results in this setting rely on informal ...
    • Modeling radio networks 

      Newport, Calvin Charles; Lynch, Nancy Ann (Springer Science and Business Media LLC, 2011-07-06)
      We describe a modeling framework and collection of foundational composition results for the study of probabilistic distributed algorithms in synchronous radio networks. Though the radio setting has been studied extensively ...
    • Motion Coordination Using Virtual Nodes 

      Lynch, Nancy; Mitra, Sayan; Nolte, Tina (2005-04-06)
      We describe how a virtual node abstraction layer can be used to coordinate the motion of real mobile nodes in a region of 2-space. In particular, we consider how nodes in a mobile ad hoc network can arrange themselves along ...
    • Multi-message broadcast with abstract MAC layers and unreliable links 

      Ghaffari, Mohsen; Kantor, Erez; Newport, Calvin Charles; Lynch, Nancy Ann (Association for Computing Machinery (ACM), 2014-07)
      We study the multi-message broadcast problem using abstract MAC layer models of wireless networks. These models capture the key guarantees of existing MAC layers while abstracting away low-level details such as signal ...
    • MultiChord: A Resilient Namespace Management Protocol 

      Lynch, Nancy; Stoica, Ion (2004-02-19)
      MultiChord is a new variant of the Chord namespace management algorithm [7] that includes lightweight mechanismsfor accommodating a limited rate of change, specifically, process joins and failures. This paper describes ...
    • Neighbor discovery in mobile ad hoc networks using an abstract MAC layer 

      Viqar, Saira; Welch, Jennifer L.; Cornejo Collado, Alex; Lynch, Nancy Ann (Institute of Electrical and Electronics Engineers, 2010-01)
      We explore the problem of neighbor discovery in a mobile ad hoc network environment. We describe a protocol for learning about neighboring nodes in such an environment. The protocol is used for establishing and tearing ...
    • Neuro-RAM unit with applications to similarity testing and compression in spiking neural networks 

      Lynch, Nancy; Parter, Merav; Musco, Cameron (2017)
      © Nancy Lynch, Cameron Musco, and Merav Parter;. We study distributed algorithms implemented in a simplified biologically inspired model for stochastic spiking neural networks. We focus on tradeoffs between computation ...
    • On simple back-off in unreliable radio networks 

      Gilbert, S; Lynch, N; Newport, C; Pajak, D (2018)
      © Seth Gilbert, Nancy Lynch, Calvin Newport, and Dominik Pajak. In this paper, we study local and global broadcast in the dual graph model, which describes communication in a radio network with both reliable and unreliable ...