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S. Hamdi, E. Bouazizi, S. Faiz
2015 ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences  
Existing research has principally focused on querying of real-time spatial data and their updates. But the unpredictability of access to data maintain the behavior of the real-time GIS unstable.  ...  The issue of real-time and heterogeneity have been extremely important for taking effective decision. Thus, heterogeneous real-time spatial data management has become a very active research domain.  ...  Further, the precision controller decreases the response time of user transactions with access to fresh data by discarding any unnecessary freshness. • Transaction handler: allows the execution of transactions  ... 
doi:10.5194/isprsannals-ii-3-w5-243-2015 fatcat:6ypsn4da65alpgxhzqlnzrlkvi

Design, Implementation, and Evaluation of a QoS-Aware Real-Time Embedded Database

Woochul Kang, Sang Hyuk Son, John A Stankovic
2012 IEEE transactions on computers  
The experimental results show that our approach supports the desired timeliness of transactions while still maintaining high data freshness compared to baseline approaches.  ...  QeDB (Quality-aware real-time Embedded DataBase) is a database for data-intensive real-time applications running on embedded devices.  ...  Because real-time transactions consist of both data accesses and computation with the retrieved data, the timeliness of these transactions is determined not only by their computational activities, but  ... 
doi:10.1109/tc.2010.240 fatcat:m7syt6yll5agpjky6npe7csgpq

QoS Management for Embedded Databases in Multicore-Based Embedded Systems

Woochul Kang, Jaeyong Chung
2015 Mobile Information Systems  
management of real-time data.  ...  With ubiquitous deployment of sensors and network connectivity, amounts of real-time data for embedded systems are increasing rapidly and database capability is required for many embedded systems for systematic  ...  We use the CPU affiliation feature of the testbed platform to assign the transactions to different CPU cores. Transactions in each active CPU core are scheduled according to real-time FIFO policy.  ... 
doi:10.1155/2015/657252 fatcat:stukdtf7ergb7mwmj6yu6vu5ka

Epsilon Equitable Partition: On Scheduling Data Loading and View Maintenance in Soft Real-time Data Warehouses

Hoang Vu Nguyen, Vivekanand Gopalkrishnan
2009 International Conference on Management of Data  
In addition, OLAP transactions are now associated with deadlines (transaction timeliness) and data freshness requirement (data timeliness).  ...  Despite high demand, moving from a traditional data warehouse to a real-time one is not straightforward since we have to deal with the problem of efficiently scheduling various activities, viz., updates  ...  With the availability of real-time data warehouses, it is natural to utilize them in streaming and time series contexts where lots of updates and data retrievals (read activities) need to be performed  ... 
dblp:conf/comad/VuG09 fatcat:j6hmhi5bnzdjdn754yd352p67m

Adaptive Update Policy for Proactive Management of Deadline Miss Ratio and Data Freshness in Real-Time Database Models

Sanjay Tanwani, Ashwani Kumar Ramani
2005 Journal of Computer Science  
A database for real-time data services has to support timing constraints and temporal consistency in addition to supporting characteristics of a conventional database system.  ...  In order to achieve these objectives, the Quality of Service (QoS) metrics like miss ratio, data freshness, perceived freshness and Quality of Data (QoD) management schemes along with architectures for  ...  With soft real-time transactions, it is not necessary that all the transactions meet their deadlines all the time. The goal is to maximize the number of transactions that meet their deadlines.  ... 
doi:10.3844/jcssp.2005.495.499 fatcat:6wzmcbpij5ee5gqyqgbjysdb6a

QeDB: A Quality-Aware Embedded Real-Time Database

Woochul Kang, Sang H. Son, John A. Stankovic
2009 2009 15th IEEE Real-Time and Embedded Technology and Applications Symposium  
which can not be true in data-intensive real-time applications.  ...  The experimental results show that our approach supports the desired timeliness of transactions while still maintaining high data freshness compared to baseline approaches. *  ...  Therefore, in QeDB, a real-time transaction is defined as a real-time task that accesses data through its RTEDB with optional transaction guarantees.  ... 
doi:10.1109/rtas.2009.31 dblp:conf/rtas/KangSS09 fatcat:kqu7wkp4srgs5i45rfnx3btev4

Real-Time Databases and Data Services

Krithi Ramamritham, Sang H. Son, Lisa Cingiser DiPippo
2004 Real-time systems  
Database freshness is the ratio of fresh data to the entire temporal data in a database. Perceived freshness is the ratio of fresh data accessed to the total data accessed by timely transactions.  ...  Dealing with Soft Transactions With soft real-time transactions, we have more leeway to process transactions since we are not required to meet the deadlines all the time.  ... 
doi:10.1023/b:time.0000045317.37980.a5 fatcat:zpzo5tconzd6zaw2zla7utkyb4

Effects on logistic operations from RFID- and EPCIS-enabled traceability

Henrik Anders Ringsberg, Vahid Mirzabeiki
2014 British Food Journal  
A conceptual model for analysing supply chains according to EPCIS standard is also presented. Design/methodology/approach A literature review was conducted to establish a theoretical framework.  ...  A case study of a Swedish fresh fish supply chain was then carried out.  ...  Costs for system integration and restructuring of data according to the proposed structure in the EPCIS standard should be borne by each company.  ... 
doi:10.1108/bfj-03-2012-0055 fatcat:zi73rddoi5hulnxffjukgiu2de

Chronos: Feedback Control of a Real Database System Performance

Kyoung-Don Kang, Jisu Oh, Sang H. Son
2007 28th IEEE International Real-Time Systems Symposium (RTSS 2007)  
It is challenging to process transactions in a timely fashion using fresh data, e.g., current stock prices, since database workloads may considerably vary due to dynamic data/resource contention.  ...  In these experiments, our database system supports the desired response time bound and data freshness, while processing a significantly larger number of transactions in time compared to the tested baselines  ...  Introduction Real-time databases (RTDBs) aim to process transactions in a timely manner using fresh temporal data, e.g., current stock prices or traffic sensor data, representing the real world status.  ... 
doi:10.1109/rtss.2007.16 dblp:conf/rtss/KangOS07 fatcat:obgwuvq3qffvhgmalh2wk2uerm

Reading temporally consistent data in broadcast disks

Victor C. S. Lee, Joseph K. Ng, Jo Y. P. Chong, Kwok-wa Lam
2004 ACM SIGMOBILE Mobile Computing and Communications Review  
In order to deliver timely and useful results, real-time transactions must read temporal consistent data in addition to completing the execution before their deadlines.  ...  However, most of the existing mobile computing applications, such as information dispersal systems for stock prices and weather information, are comprised of real-time read only transactions.  ...  They pointed out that with concurrency control in place to ensure data integrity, it is difficult to maintain temporal consistency since transactions may not be able to produce correct results on time.  ... 
doi:10.1145/1031483.1031491 fatcat:b6qitsdc45a5popfslofy2r5q4

Active XML-based Web data integration

Rashed Salem, Omar Boussaïd, Jérôme Darmont
2013 Information Systems Frontiers  
Our framework is also subscribed to web services for real-time change data capture.  ...  It exploits the XML language to address data heterogeneity, Web services to tackle data distribution, and Active XML (AXML) to store integrated data.  ...  Active and Real-Time Warehousing To improve data freshness and to realize real-time decision support systems, Tho & Tjoa (2003) propose a framework for building Zero-Latency Data Warehouse (ZLDW).  ... 
doi:10.1007/s10796-012-9405-6 fatcat:vl5yw3f6wjdexffqp2rerss2bq

Simulation framework for real-time database on WSNs

Ousmane Diallo, Joel J.P.C. Rodrigues, Mbaye Sene, Jaime Lloret
2014 Journal of Network and Computer Applications  
This is the real-time database management on WSN and it deals with time-constrained data, time-constrained transactions, and limited resources of wireless sensors.  ...  The aim of this paper is to describe the different specificities of real-time databases on WSN and to present a model for a simulation framework of the real-time databases management on WSN that uses a  ...  The RT-DBMS receives the real-time update transactions and processes them according to logic and time constraints of data and transactions.  ... 
doi:10.1016/j.jnca.2013.07.001 fatcat:fpojkm6nubhqviqubywh5jhmg4

Scalable Data-Oriented Replication with Flexible Consistency in Real-Time Data Systems

2016 Data Science Journal  
Each node contains an Active_list data structure which holds the most recent node identifiers that access each of the data objects which are sorted according to the time stamp of activity.  ...  According to the load hypothesis (Burns & Wellings 2001) , a hard real-time system can only handle a limited rate of load due to time constraints.  ... 
doi:10.5334/dsj-2016-004 fatcat:ygkkln6nv5g67h4iimfe3jsdky

Optimizing data warehouse loading procedures for enabling useful-time data warehousing

Ricardo Jorge Santos, Jorge Bernardino
2009 Proceedings of the 2009 International Database Engineering & Applications Symposium on - IDEAS '09  
To cope with real-time requirements, the data warehouses must be able to enable continuous data integration, in order to deal with the most recent business data.  ...  For real-time enterprises with needs in decision support while the transactions are occurring, (near) real-time data warehousing seem very promising.  ...  Active Data Warehousing refers to a new trend where DWs are updated as frequently as possible, due to the high demands of users for fresh data.  ... 
doi:10.1145/1620432.1620464 dblp:conf/ideas/SantosB09 fatcat:eyra3bv72bd27lln3gw2nfv44y

Using a Business Activity Monitoring and SOA for a Real-Time ETL

Abdelmgeid A., Waleed M.
2018 International Journal of Computer Applications  
Data warehousing technology has made a huge effect in the world of business; it transforms information into data that helps analysts to make strategic decisions. A real-time  ...  Data that is obtained from various information sources needs excessively handling for managing, analyzing and monitoring. Data warehouse consolidates data coming from different data sources.  ...  Due to demand for fresh data in data warehouse we need to shift from traditional data warehouse to real time data warehouse.  ... 
doi:10.5120/ijca2018916152 fatcat:pdqlhc65sff7nc54vaneqxp47m
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