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Schedulers are no Prophets [chapter]

Arnd Hartmanns, Holger Hermanns, Jan Krčál
2015 Lecture Notes in Computer Science  
In this setting, some obscure phenomena are known to exist, related to the fact that schedulers may yield too pessimistic verification results, since current nondeterminism can surprisingly be resolved  ...  The latter uses an encoding into the model of stochastic timed automata under arbitrary schedulers, for which model checking tool support has recently become available.  ...  are not supposed to be prophets.  ... 
doi:10.1007/978-3-319-27810-0_11 fatcat:rjczvpwxqbehhpssdgdakpohnu

Improvement of Messages Delivery Time on Vehicular Delay-Tolerant Networks

Vasco Nuno da Gama de Jesus Soares, Joel José Puga Coelho Rodrigues, Paulo Salvador Ferreira, António Manuel Duarte Nogueira
2009 2009 International Conference on Parallel Processing Workshops  
Further simulations show that these results outperform the MaxProp and PRoPHET routing protocols that have their own scheduling and dropping mechanisms.  ...  Therefore, efficient scheduling and dropping policies are necessary to improve the overall network performance.  ...  Hence, there is no guarantee that the TTL of these messages will expire soon or not. Random scheduling policy sends messages in a random order.  ... 
doi:10.1109/icppw.2009.33 dblp:conf/icppw/SoaresRFN09 fatcat:d457w6xy7bhsnln3gf4pg2mvf4

Scheduling Executors with Time-varying Resource Demands on Data-Parallel Computation Frameworks

Hu Yang, Su Lin
2017 DEStech Transactions on Social Science Education and Human Science  
The execution instance for scheduling becomes executor, which executes an entire application once it is scheduled. Usually it is not short lived. Its resource demands are significantly time-varying.  ...  With this knowledge, Prophet schedules executors to minimize resource fragmentation and over-allocation.  ...  Section III describes design of the Prophet scheduling scheme. Section IV describes the implementation and evaluation of Prophet.  ... 
doi:10.12783/dtssehs/asshm2016/8355 fatcat:sxd7htsllzalvlmxopfpvze7hy

An Optimized Probabilistic Delay Tolerant Network (DTN) Routing Protocol Based on Scheduling Mechanism for Internet of Things (IoT)

Yuxin Mao, Chenqian Zhou, Yun Ling, Jaime Lloret
2019 Sensors  
Two scheduling mechanisms are proposed to extend the traditional PROPHET protocol and improve performance in both storage and transmission in DTN.  ...  The results demonstrate that the proposed Scheduling-PROPHET can achieve better performances in several key aspects compared with the existing protocols.  ...  Conflicts of Interest: The authors declare no conflict of interest.  ... 
doi:10.3390/s19020243 fatcat:mbslrkrbknfyvfygydpelk5cdy

Predicting Potential Speedup of Serial Code via Lightweight Profiling and Emulations with Memory Performance Model

Minjang Kim, Pranith Kumar, Hyesoon Kim, Bevin Brett
2012 2012 IEEE 26th International Parallel and Distributed Processing Symposium  
are hard to model in previous approaches.  ...  Parallel Prophet models many realistic features of parallel programs: unbalanced workload, multiple critical sections, nested and recursive parallelism, and specific thread schedulings and paradigms, which  ...  Kismet is different from Parallel Prophet in that no annotation is needed.  ... 
doi:10.1109/ipdps.2012.128 dblp:conf/ipps/KimKKB12 fatcat:hcolajzgqfayzduw4nnb74fkt4

Evaluation of dynamic DTN routing protocols in space environment

Ioannis Komnios, Sotirios Diamantopoulos, Vassilis Tsaoussidis
2009 2009 International Workshop on Satellite and Space Communications  
In this study, we evaluate some of the most prominent routing protocols for Delay-Tolerant Networks, Epidemic, PRoPHET and Contact Graph Routing, in space environment.  ...  In this context, all data packets are handled equally and no special treatment can be applied to urgent data.  ...  PRoPHET is a completely autonomous routing protocol since no management is required; available links between nodes are dynamically discovered and previous knowledge is used for planning future transmissions  ... 
doi:10.1109/iwssc.2009.5286392 fatcat:ylqzfz42vfaadj263vramfnjry

Data‑driven hospital personnel scheduling optimization through patients prediction

Defan Feng Et Al.
2020 Zenodo  
These factors are very important in the hospital staff scheduling problem.  ...  Concerning this, this paper establishes an optimization system combining a two-layer mixed-integer linear programming and an extended prophet model for the hospital personnel scheduling.  ...  In manual scheduling, the work shift schedules of medical personnel are typically decided by the hospital managers.  ... 
doi:10.5281/zenodo.5105961 fatcat:e4bqm7qhurcinomz45qesx76hm

A Hierarchy of Scheduler Classes for Stochastic Automata [chapter]

Pedro R. D'Argenio, Marcus Gerhold, Arnd Hartmanns, Sean Sedwards
2018 Lecture Notes in Computer Science  
Measures of interest are defined over schedulers that resolve the nondeterminism.  ...  In this paper we investigate the power of various theoretically and practically motivated classes of schedulers, considering the classic complete-information view and a restriction to non-prophetic schedulers  ...  On the other hand, when restricting schedulers to see the expiration order only, history-dependent and memoryless schedulers are no longer equivalent: Proposition 5. S hist ,v,o S ml ,v,o . Proof.  ... 
doi:10.1007/978-3-319-89366-2_21 fatcat:n5vypaav6fcmvp4lldb7zxdnqe

A Hierarchy of Scheduler Classes for Stochastic Automata [article]

Pedro R. D'Argenio, Marcus Gerhold, Arnd Hartmanns, Sean Sedwards
2017 arXiv   pre-print
Measures of interest are defined over schedulers that resolve the nondeterminism.  ...  In this paper we investigate the power of various theoretically and practically motivated classes of schedulers, considering the classic complete-information view and a restriction to non-prophetic schedulers  ...  simple schedulers in planning.  ... 
arXiv:1710.05763v1 fatcat:rcy7ywo6nbh3te3d6sbd32blr4

Page 746 of New Outlook Vol. 98, Issue 13 [page]

1911 New Outlook  
There can be no doubt that the weight of the argument is overwhelmingly in favor of a revision of Schedule K; but it is hardly necessary to weaken it by concessions which the facts do not seem to demand  ...  No king who has ever ruled could boast of such a lineage. There is no parallel anywhere to such a  ... 

Modification of PRoPHET to Enhance Train-based Delay-Tolerant Networks Performance

Agus Wibowo, Selo Sulistyo, I Mustika
2019 International Journal of Intelligent Engineering and Systems  
In some original PRoPHET and original PRoPHETv2 testing, they are superior to other routing protocols.  ...  This happens because messages delivery to other relay nodes are assumed to encounter the destination (having a larger probability of encountering destination) while the other relay nodes are moving away  ...  The modified PRoPHET and the modified PRoPHETv2 are more suitable for use in environments that use scheduled trains that move in one direction and once a day as node relays than the original PRoPHET and  ... 
doi:10.22266/ijies2019.0630.10 fatcat:e3wxqexctbe3ld5pfmzcraaqai

Performance Improvement of DTN Routing Protocols with Enhanced Buffer Management Policy

2019 International journal of recent technology and engineering  
This proposed buffer management policy is evaluated with two popular DTN routing protocols Spray-and-Wait and Prophet.  ...  The two major issues in DTN are routing and buffer management.  ...  Result Analysis In figure 2 various protocols like SNW, ESNW, PROPHET, EPROPHET are compared by varying number of nodes.  ... 
doi:10.35940/ijrte.d9145.118419 fatcat:w2lfnnciwjfbjdkbehlq6k25qq

Performance Evaluation of Joint Routing and Scheduling in Opportunistic Sensor Networks

Roohinaz M, Mehul B. Shah
2015 International Journal of Computer Applications  
This is contrary to community mobility model as shown for PROPHET algorithm, in which Most Forwarded First (MOFO) scheme performs better.  ...  In present scenario the innovation of mobile phones that are embedded with different types of onboard sensors, has brought on a new interest of using them as the main part of the sensor network, for a  ...  In OSN proper scheduling is defined by routing combined with proper buffer management policy. Moreover routing decisions are node based, so selection of proper Buffer management is also significant.  ... 
doi:10.5120/21816-5144 fatcat:y2uqvkh3k5fefi7y54eewtnldy

Page 297 of Anglican Theological Review Vol. 42, Issue 4 [page]

1960 Anglican Theological Review  
Precisely where we are to pinpoint the Zwickau Prophets in all this ebb and flow of the prophetic impulse no- body can tell.  ...  His age of the Spirit was scheduled to begin in 1260.  ... 

Analysis and evaluation of probabilistic routing protocol for intermittently connected network

Jahnabi Borah
2013 IOSR Journal of Computer Engineering  
In this paper the architecture of delay tolerant network is being discussed and PROPHET protocol is implemented.  ...  PROPHET routing protocol works on the principle of history of encounters and transitivity. It is called Probabilistic routing protocol since it uses a parameter 'Delivery of Predictability'.  ...  Opportunistic contacts: They are not scheduled, but are encountered unexpectedly and this takes place frequently due to node mobility.  ... 
doi:10.9790/0661-0910107 fatcat:ouu3p3jp45hcrcbvpcmvnbmhh4
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