The Experts below are selected from a list of 1072248 Experts worldwide ranked by ideXlab platform

Elizabeth M Beldingroyer - One of the best experts on this subject based on the ideXlab platform.

  • a secure routing protocol for ad hoc Networks
    International Conference on Network Protocols, 2002
    Co-Authors: K Sanzgiri, B Dahill, Brian Neil Levine, Clay Shields, Elizabeth M Beldingroyer
    Abstract:

    Most recent ad hoc Network Research has focused on providing routing services without considering security. We detail security threats against ad hoc routing protocols, specifically examining AODV and DSR. In light of these threats, we identify three different environments with distinct security requirements. We propose a solution to one, the managed-open scenario where no Network infrastructure is pre-deployed, but a small amount of prior security coordination is expected. Our protocol, authenticated routing for ad hoc Networks (ARAN), is based on certificates and successfully defeats all identified attacks.

Eric Knight - One of the best experts on this subject based on the ideXlab platform.

  • critiquing construct validity in world city Network Research moving from office location Networks to inter organizational projects in the modeling of intercity business flows
    Geographical Analysis, 2021
    Co-Authors: Vladimir Pažitka, Dariusz Wojcik, Eric Knight
    Abstract:

    The interlocking world city Network model and other office location approaches (OLAs) have become the most widely used empirical models of the world city Network (WCN). Despite numerous methodological improvements, they continue to rely on a legacy of using data on office locations of firms to indirectly estimate intercity business flows. To advance the dialogue about how to improve on existing empirical models of the WCN, we examine the content, construct and structural validity of OLAs. We analyze the link between the theoretical construct of intercity business flows and Network projections obtained from office location data and uncover evidence that calls into question the validity of OLAs as empirical models of the WCN. In the spirit of no deconstruction without reconstruction, we then develop an alternative empirical model of the WCN, based on directly observable relational ties among APS firms, which are formed through co-production of complex services. We call this the inter-organizational project approach (IOPA). We argue for IOPA's construct validity as an empirical model of the WCN and offer empirical evidence for its structural validity. We demonstrate it using a global sample of 161,114 investment bank syndicates in the 2000-2015 period.

  • construct validity in world city Network Research from office location Networks to inter organisational projects in the analysis of intercity business flows
    Social Science Research Network, 2019
    Co-Authors: Vladimir Pažitka, Dariusz Wojcik, Eric Knight
    Abstract:

    The Interlocking World City Network Model (IWCNM) and other office location approaches (OLAs) have become the most widely used empirical models of the world city Network (WCN) over the last two decades. Despite numerous methodological improvements, they still rely on Taylor’s (2001) legacy of using data on office locations of firms to indirectly estimate intercity business flows. Notwithstanding criticism from both within the mainstream of the global and world cities Research as well as postcolonial and poststructuralist geographers, OLAs maintain their dominant position in recently published Research. To advance the dialogue on the appropriateness of OLAs as empirical models of WCN, we consider their construct validity by examining the link between theory and empirical models. We uncover evidence that calls into question the validity of OLAs for empirical modelling of intercity business flows. In the spirit of no deconstruction without reconstruction, we develop a new model based on directly observable business flows, which we call the inter-organisational project approach (IOPA). We deductively argue for IOPA’s construct validity as an empirical model of the WCN and offer empirical evidence for its structural validity. We demonstrate it using a global sample of 161,114 investment bank syndicates in the 2000 – 2015 period.

K Sanzgiri - One of the best experts on this subject based on the ideXlab platform.

  • a secure routing protocol for ad hoc Networks
    International Conference on Network Protocols, 2002
    Co-Authors: K Sanzgiri, B Dahill, Brian Neil Levine, Clay Shields, Elizabeth M Beldingroyer
    Abstract:

    Most recent ad hoc Network Research has focused on providing routing services without considering security. We detail security threats against ad hoc routing protocols, specifically examining AODV and DSR. In light of these threats, we identify three different environments with distinct security requirements. We propose a solution to one, the managed-open scenario where no Network infrastructure is pre-deployed, but a small amount of prior security coordination is expected. Our protocol, authenticated routing for ad hoc Networks (ARAN), is based on certificates and successfully defeats all identified attacks.

Vladimir Pažitka - One of the best experts on this subject based on the ideXlab platform.

  • critiquing construct validity in world city Network Research moving from office location Networks to inter organizational projects in the modeling of intercity business flows
    Geographical Analysis, 2021
    Co-Authors: Vladimir Pažitka, Dariusz Wojcik, Eric Knight
    Abstract:

    The interlocking world city Network model and other office location approaches (OLAs) have become the most widely used empirical models of the world city Network (WCN). Despite numerous methodological improvements, they continue to rely on a legacy of using data on office locations of firms to indirectly estimate intercity business flows. To advance the dialogue about how to improve on existing empirical models of the WCN, we examine the content, construct and structural validity of OLAs. We analyze the link between the theoretical construct of intercity business flows and Network projections obtained from office location data and uncover evidence that calls into question the validity of OLAs as empirical models of the WCN. In the spirit of no deconstruction without reconstruction, we then develop an alternative empirical model of the WCN, based on directly observable relational ties among APS firms, which are formed through co-production of complex services. We call this the inter-organizational project approach (IOPA). We argue for IOPA's construct validity as an empirical model of the WCN and offer empirical evidence for its structural validity. We demonstrate it using a global sample of 161,114 investment bank syndicates in the 2000-2015 period.

  • construct validity in world city Network Research from office location Networks to inter organisational projects in the analysis of intercity business flows
    Social Science Research Network, 2019
    Co-Authors: Vladimir Pažitka, Dariusz Wojcik, Eric Knight
    Abstract:

    The Interlocking World City Network Model (IWCNM) and other office location approaches (OLAs) have become the most widely used empirical models of the world city Network (WCN) over the last two decades. Despite numerous methodological improvements, they still rely on Taylor’s (2001) legacy of using data on office locations of firms to indirectly estimate intercity business flows. Notwithstanding criticism from both within the mainstream of the global and world cities Research as well as postcolonial and poststructuralist geographers, OLAs maintain their dominant position in recently published Research. To advance the dialogue on the appropriateness of OLAs as empirical models of WCN, we consider their construct validity by examining the link between theory and empirical models. We uncover evidence that calls into question the validity of OLAs for empirical modelling of intercity business flows. In the spirit of no deconstruction without reconstruction, we develop a new model based on directly observable business flows, which we call the inter-organisational project approach (IOPA). We deductively argue for IOPA’s construct validity as an empirical model of the WCN and offer empirical evidence for its structural validity. We demonstrate it using a global sample of 161,114 investment bank syndicates in the 2000 – 2015 period.

New Zealand - One of the best experts on this subject based on the ideXlab platform.

  • Cardigan : Deploying a Distributed Routing Fabric
    Proceedings of the second ACM SIGCOMM workshop on Hot topics in software defined networking - HotSDN '13, 2013
    Co-Authors: Jonathan Philip Stringer, Christopher Lorier, New Zealand
    Abstract:

    SDN is an active area for Network Research, with many organisations exploring the opportunities provided by the de-coupling of Network control from packet forwarding. Previous work has suggested that a hybrid Networking model will pave the way for migration towards SDN, through interoperability with legacy devices. However, questions remain over the operation of such systems in production environments. In order to build operational confidence, we built a simple distributed router using OpenFlow and deployed it at a public Internet exchange. This implementation provides insights into the challenges involved with using these technologies, and suggests the viability of mixed device environments despite the limitations of early OpenFlow implementations.