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ModelDependence of Shapiro Time Delay and the ‘Speed of
 Gravity/Speed of Light’ Controversy”, grqc/0403060 v3
"... Fomalont and Kopeikin have recently succeeded in measuring the velocitydependent component of the Shapiro time delay of light from a quasar passing behind Jupiter. While there is general agreement that this observation tests the Lorentz transformation properties of the gravitational field, a contro ..."
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Fomalont and Kopeikin have recently succeeded in measuring the velocitydependent component of the Shapiro time delay of light from a quasar passing behind Jupiter. While there is general agreement that this observation tests the Lorentz transformation properties of the gravitational field, a
Feasibility of measuring the Shapiro time delay over meterscale distances
"... Abstract. The time delay of light as it passes by a massive object, first calculated by Shapiro in 1964, is a hallmark of the curvature of spacetime. To date, all measurements of the Shapiro time delay have been made over solarsystem distance scales. We show that the new generation of kilometersc ..."
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Abstract. The time delay of light as it passes by a massive object, first calculated by Shapiro in 1964, is a hallmark of the curvature of spacetime. To date, all measurements of the Shapiro time delay have been made over solarsystem distance scales. We show that the new generation of kilometer
On the Speed of Gravity and the v/c Corrections to the Shapiro Time Delay
, 2003
"... Using a relatively simple method, I compute the v/c correction to the gravitational time delay for light passing by a massive object moving with speed v. It turns out that the v/c effects are too small to have been measured in the recent experiment involving Jupiter and quasar J0842+1845 that was us ..."
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Cited by 4 (0 self)
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Using a relatively simple method, I compute the v/c correction to the gravitational time delay for light passing by a massive object moving with speed v. It turns out that the v/c effects are too small to have been measured in the recent experiment involving Jupiter and quasar J0842
On the Speed of Gravity and Relativistic v/c Corrections to the Shapiro Time Delay
, 2006
"... Recent papers by Samuel [1,2] declared that the linearized postNewtonian v/c effects are too small to have been measured in the recent experiment involving Jupiter and quasar J0842+1845 [3,4,5] that was used to measure the ultimate speed of gravity defined as a fundamental constant entering in fron ..."
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in front of each time derivative of the metric tensor in the Einstein gravity field equations. We describe our Lorentzinvariant formulation of the Jovian deflection experiment and confirm that v/c effects are do observed, as contrasted to the erroneous claim by Samuel, and that they vanish if and only
Reply to “Comment on Modeldependence of Shapiro time delay and the ‘speed of gravity/speed of light ’ controversy”
, 2005
"... To determine whether Shapiro time delay—or any other measured quantity—depends on the “speed of gravity ” cg or the “speed of light ” c, one must analyze observations in a framework in which cg and c can be different. A model with cg = c is almost inevitably a bimetric theory, with a “gravitational ..."
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To determine whether Shapiro time delay—or any other measured quantity—depends on the “speed of gravity ” cg or the “speed of light ” c, one must analyze observations in a framework in which cg and c can be different. A model with cg = c is almost inevitably a bimetric theory, with a
Consensus Problems in Networks of Agents with Switching Topology and TimeDelays
, 2003
"... In this paper, we discuss consensus problems for a network of dynamic agents with fixed and switching topologies. We analyze three cases: i) networks with switching topology and no timedelays, ii) networks with fixed topology and communication timedelays, and iii) maxconsensus problems (or leader ..."
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Cited by 1052 (17 self)
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In this paper, we discuss consensus problems for a network of dynamic agents with fixed and switching topologies. We analyze three cases: i) networks with switching topology and no timedelays, ii) networks with fixed topology and communication timedelays, and iii) maxconsensus problems (or
Routing in a delay tolerant network
 Proceedings of ACM Sigcomm
, 2004
"... We formulate the delaytolerant networking routing problem, where messages are to be moved endtoend across a connectivity graph that is timevarying but whose dynamics may be known in advance. The problem has the added constraints of finite buffers at each node and the general property that no con ..."
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Cited by 612 (8 self)
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We formulate the delaytolerant networking routing problem, where messages are to be moved endtoend across a connectivity graph that is timevarying but whose dynamics may be known in advance. The problem has the added constraints of finite buffers at each node and the general property
A DelayTolerant Network Architecture for Challenged Internets
, 2003
"... The highly successful architecture and protocols of today’s Internet may operate poorly in environments characterized by very long delay paths and frequent network partitions. These problems are exacerbated by end nodes with limited power or memory resources. Often deployed in mobile and extreme env ..."
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Cited by 937 (13 self)
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The highly successful architecture and protocols of today’s Internet may operate poorly in environments characterized by very long delay paths and frequent network partitions. These problems are exacerbated by end nodes with limited power or memory resources. Often deployed in mobile and extreme
A theory of timed automata
, 1999
"... Model checking is emerging as a practical tool for automated debugging of complex reactive systems such as embedded controllers and network protocols (see [23] for a survey). Traditional techniques for model checking do not admit an explicit modeling of time, and are thus, unsuitable for analysis of ..."
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Cited by 2651 (32 self)
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of realtime systems whose correctness depends on relative magnitudes of different delays. Consequently, timed automata [7] were introduced as a formal notation to model the behavior of realtime systems. Its definition provides a simple way to annotate statetransition graphs with timing constraints
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