7 research outputs found
Firefly-inspired Heartbeat Synchronization in Overlay Networks
Heartbeat synchronization strives to have nodes in a
distributed system generate periodic, local âheartbeatâ
events approximately at the same time. Many useful distributed protocols rely on the existence of such heart-beats for driving their cycle-based execution. Yet, solving the problem in environments where nodes are unreliable and messages are subject to delays and failures
is non-trivial. We present a heartbeat synchronization
protocol for overlay networks inspired by mathematical models of flash synchronization in certain species of
fireflies. In our protocol, nodes send flash messages to
their neighbors when a local heartbeat triggers. They
adjust the phase of their next heartbeat based on incoming flash messages using an algorithm inspired by
mathematical models of firefly synchronization. We report simulation results of the protocol in various realistic failure scenarios typical in overlay networks and
show that synchronization emerges even when messages
can have significant delay subject to large jitter
Productive resistance within the public sector: exploring organisational culture
The article examines how South Korean civil servants responded to the introduction of pay for performance. Drawing upon 31 in-depth interviews with career civil servants, it identifies what became known as 1/n, a form of âdiscreet resistanceâ that emerged and evolved. The analytical framework allows productive resistance to be seen as ebbing and flowing during organisational change that sees institutionalisation, deinstitutionalisation and re-institutionalisation. In understanding the cultural context of organisational resistance the contribution is three-fold. First, a nuanced definition and understanding of productive resistance. Second, it argues that productive resistance must be seen as part of a process that does not simply reflect âoffer and counter-offerâ within the change management process. Thirdly, it identifies differences within groups and sub-cultures concerning commitment towards resistance and how these fissures contribute towards change as new interpretive schemes and justifications are presented in light of policy reformulations
Versatile algorithms for the computation of 2-point spatial correlations in quantifying material structure
Firefly-inspired Heartbeat Synchronization in Overlay Networks
Heartbeat synchronization strives to have nodes in a
distributed system generate periodic, local \u201cheartbeat\u201d
events approximately at the same time. Many useful distributed protocols rely on the existence of such heart-beats for driving their cycle-based execution. Yet, solving the problem in environments where nodes are unreliable and messages are subject to delays and failures
is non-trivial. We present a heartbeat synchronization
protocol for overlay networks inspired by mathematical models of flash synchronization in certain species of
fireflies. In our protocol, nodes send flash messages to
their neighbors when a local heartbeat triggers. They
adjust the phase of their next heartbeat based on incoming flash messages using an algorithm inspired by
mathematical models of firefly synchronization. We report simulation results of the protocol in various realistic failure scenarios typical in overlay networks and
show that synchronization emerges even when messages
can have significant delay subject to large jitter