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DeeDS towards a distributed and active real-time database system

S. F. Andler, J. Hansson, J. Eriksson, J. Mellin, M. Berndtsson, B. Eftring
1996 SIGMOD record  
For example, in integrated vehicle systems control we h a ve identi ed a need for autonomous nodes controlling individual subsystems and handling large amounts of data locally under hard timing constraints  ...  When building distributed databases, sources of unpredictability are introduced due to network communication and distributed commit processing, as well as disk accesses.  ... 
doi:10.1145/381854.381881 fatcat:byp757baj5di5lqyrvxgnbwu3e

Information survivability for evolvable and adaptable real-time command and control systems

B.M. Thuraisingham, J.A. Maurer
1999 IEEE Transactions on Knowledge and Data Engineering  
MITRE's Evolvable Real-Time C3 (Command, Control, and Communications) project has developed an approach that would enable current real-time systems to evolve into the systems of the future.  ...  In particular, adaptable middleware for survivable systems is discussed.  ...  We gratefully acknowledge the Air Force Mission Oriented Investigation and Experimentation (MOIE) Program for supporting the work described in this report.  ... 
doi:10.1109/69.755631 fatcat:4cbtzqw2szajndcojvjsfd35za

Misconceptions about real-time databases

J.A. Stankovic, Sang Hyuk Son, J. Hansson
1999 Computer  
In a real-time database system, timing constraints are associated with transactions, and data are valid for specific time intervals. 2, 3 The transaction timing constraints can be completion deadlines,  ...  It is not necessary that every transaction have a timing constraint, only that some do. In addition to transaction timing requirements, data has time semantics as well.  ...  , communication resources, and I/O devices), and timing constraints.  ... 
doi:10.1109/2.769440 fatcat:fgewots6vve5lhsvjqb55xcoxm

Data replication versus timing constraints in distributed database systems

Özgür Ulusoy
1994 Proceedings of the 22nd annual ACM computer science conference on Scaling up : meeting the challenge of complexity in real-world computing applications meeting the challenge of complexity in real-world computing applications - CSC '94  
A comparison of several real-time concurrency control protocols, which are based on different approaches in involving timing constraints of transactions in scheduling, is also provided in performance experiments  ...  Each real-time transaction is associated with a timing constraint, typically in the form of a deadline.  ...  Our performance model captures the basic characteristics of a distributed database system that processes transactions each associated with a timing constraint in the form of a deadline and a criticalness  ... 
doi:10.1145/197530.197640 dblp:conf/acm/Ulusoy94 fatcat:2245zwq4unbzvloqfy43756st4

Misconceptions about real-time computing: a serious problem for next-generation systems

J.A. Stankovic
1988 Computer  
Acknowledgments A longer and more technical version of this article,' produced in concert with the individuals listed above, is available from J . Stankovic.  ...  and time-critical traffic.  ...  On the other hand, in the schedulability analysis of real-time process scheduling-for example, processes for signal processing and feedback control-it is customary to assume that tasks are independent,  ... 
doi:10.1109/2.7053 fatcat:drcxobeoijhsrgn2mazg47cj3u

Processing real-time transactions in a replicated database system

�zg�r Ulusoy
1994 Distributed and parallel databases  
A comparison of several real-time concurrency control protocols, which are based on different approaches in involving timing constraints of transactions in scheduling, is also provided in performance experiments  ...  Each real-time transaction is associated with a timing constraint, typically in the form of a deadline.  ...  Our performance model captures the basic characteristics of a distributed database system that processes transactions each associated with a timing constraint in the form of a deadline and a criticalness  ... 
doi:10.1007/bf01265321 fatcat:jzfnpav56vecpb2bei45ypiane

Scheduling and Concurrency Control for Real-Time Database Systems

Sang H. Son, Seog Park
1993 Database Systems for Advanced Applications '93  
Transactions in real-time database systems should be scheduled considering both data consistency and timing constraints.  ...  In this paper we describe characteristics and requirements of real-time database systems such as timing constraints, correctness criteria and predictability.  ...  In conventional database systems, transaction processing requires access to a database stored on secondary storage; thus transaction response time is limited by disk access delays, which can be in the  ... 
doi:10.1142/9789814503730_0025 fatcat:rkpvtpxrfrfubclaksscot2pxu

An Architecture for Proactive Timed Web Service Compositions [chapter]

Johann Eder, Horst Pichler, Stefan Vielgut
2006 Lecture Notes in Computer Science  
According to organizational rules temporal constraints, like deadlines, must be defined for processes. Violation of these constraints usually results in increased cost and reduced quality of service.  ...  Advanced workflow time management approaches allow the prediction of eventually arising time constraint violations and enables proactive initiation of evasive "self healing" actions.  ...  Model Database At the last step of the build time phase the timed graph must be stored in the Model Database. The model database holds a timed graph for each time-managed process.  ... 
doi:10.1007/11837862_31 fatcat:qyfzmyr4rzcz3dvyh2uszbezxq

Federated Control with Hierarchical Multi-Agent Deep Reinforcement Learning [article]

Saurabh Kumar, Pararth Shah, Dilek Hakkani-Tur, Larry Heck
2017 arXiv   pre-print
The framework extends the multi-agent learning setup by introducing a meta-controller that guides the communication between agent pairs, enabling agents to focus on communicating with only one other agent  ...  The controllers do not communicate with each other but instead independently achieve the task of emitting a time value that is consistent with their database and the meta-controller's constraint.  ...  This constraint is applied to the two agents' databases, and the controllers then communicate with each other for K = 2 rounds.  ... 
arXiv:1712.08266v1 fatcat:k7cxwwyedfc5tl22vasi76uxny

Data-Centric Knowledge Discovery Strategy for a Safety-Critical Sensor Application

Nilamadhab Mishra, Hsien-Tsung Chang, Chung-Chih Lin
2014 International Journal of Antennas and Propagation  
The cluster may be controlled by a dedicated programmed autonomous microcontroller device powered with electricity to perform in-network time critical functions, such as data collection, data processing  ...  In an indoor safety-critical application, sensors and actuators are clustered together to accomplish critical actions within a limited time constraint.  ...  ) { CH maps the data into the database with its access key } } Knowledge filtration () { Input: integrated database Output: control instructions to be stored in the knowledge base Process: fuzzy  ... 
doi:10.1155/2014/172186 fatcat:bjeorszs5ffzzemsamzhelr33i

Intelligent robot control using an adaptive critic with a task control center and dynamic database

E. L. Hall, M. Ghaffari, X. Liao, S. M. Alhaj Ali, David P. Casasent, Ernest L. Hall, Juha Röning
2006 Intelligent Robots and Computer Vision XXIV: Algorithms, Techniques, and Active Vision  
This generality should encourage the development of more mobile robots with manipulator capability since both models can be easily stored in the dynamic database.  ...  The purpose of this paper is to describe the design, development and simulation of a real time controller for an intelligent, vision guided robot.  ...  This is the inter-process communication capability between the task control center and the dynamic database.  ... 
doi:10.1117/12.685367 fatcat:dqmfuqohvvdqjpiw6btpyjmwqa

Fault and Error Containment of Gateways in Distributed Real-Time Systems

Roman Obermaisser
2009 Journal of Software  
The proposed solution is experimentally evaluated in an example system with a time-triggered Ethernet network and a Controller Area Network (CAN).  ...  For accessing the real-time database from attached networks, we introduce network adaptors that ensure compliance with temporal specifications expressed using state machines with timing constraints.  ...  For example, clusters in the aerospace domain range from non safety-critical passenger entertainment systems to safety-critical flight related subsystems, such as engine management and flight control  ... 
doi:10.4304/jsw.4.7.686-695 fatcat:znzm2x3xqzgkhpixzg2qoxcfo4

Clustering Algorithm for Distributed Real-Time Database sites

Hatem Ahmed, Rashed Salem, Safa Saleh
2015 IJCI. International Journal of Computers and Information  
In this paper, we introduce a clustering algorithm for distributed real-time database that depend on both the communication time cost and the timing properties of data.  ...  The demand for real-time database is increasing. Indeed, most real-time systems are inherently distributed in nature and need to handle data in a timely fashion.  ...  We planned to treat the problem of false allowed sites in CSM(two sites that share in data but the communication cost between them is larger than the validation duration property of the shared data) by  ... 
doi:10.21608/ijci.2015.33957 fatcat:n2gfsdfihfffrhvkjrh7wjqe2i

Comparative Study of Temporal Aspects of Data Collection Using Remote Database vs. Abstract Database in WSN

Abderrahmen BELFKIH, Bruno SADEG, Claude DUVALLET, Laurent AMANTON
2015 Sensors & Transducers  
In recent years, the query processing using abstract database technology like Cougar and TinyDB has shown efficient results in many researches.  ...  The first is based on a warehousing approach, in which data are collected and stored on a remote database. The second is based on query processing using an abstract database like TinyDB.  ...  WSN applications, such as industrial process monitoring and control, can be considered as time critical. They require strict deadlines to send data to the sink nodes.  ... 
doaj:4d693f802316496b96e325079afb5a24 fatcat:tqm636yyt5hvxfbj4hn6hzil7i

Linking codesign and reuse in embedded systems design

M. Meerwein, C. Baumgartner, W. Glauert
2000 Proceedings of the eighth international workshop on Hardware/software codesign - CODES '00  
Special emphasis has been put on satisfying the requirements of industrial design practice and on the technical and economic constraints associated with automotive control applications.  ...  The objectoriented database architecture allows efficient management of a large number of modules.  ...  Introduction Automotive applications are highly cost-critical and yet they have to satisfy stringent real-time constraints.  ... 
doi:10.1145/334012.334030 dblp:conf/codes/MeerweinBG00 fatcat:35k6pk5ufnh63hswlttypafyp4
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