From Metadata Catalogs to Distributed Data Processing for Smart City Platforms and Services: A Study on the Interplay of CKAN and Hadoop

Author(s):  
Robert Scholz ◽  
Nikolay Tcholtchev ◽  
Philipp Lämmel ◽  
Ina Schieferdecker
Author(s):  
Tianjian Lu ◽  
Stephan Hoyer ◽  
Qing Wang ◽  
Lily Hu ◽  
Yi-Fan Chen

Sensors ◽  
2020 ◽  
Vol 20 (9) ◽  
pp. 2737
Author(s):  
Leandro Ordonez-Ante ◽  
Gregory Van Seghbroeck ◽  
Tim Wauters ◽  
Bruno Volckaert ◽  
Filip De Turck

Citizen engagement is one of the key factors for smart city initiatives to remain sustainable over time. This in turn entails providing citizens and other relevant stakeholders with the latest data and tools that enable them to derive insights that add value to their day-to-day life. The massive volume of data being constantly produced in these smart city environments makes satisfying this requirement particularly challenging. This paper introduces Explora, a generic framework for serving interactive low-latency requests, typical of visual exploratory applications on spatiotemporal data, which leverages the stream processing for deriving—on ingestion time—synopsis data structures that concisely capture the spatial and temporal trends and dynamics of the sensed variables and serve as compacted data sets to provide fast (approximate) answers to visual queries on smart city data. The experimental evaluation conducted on proof-of-concept implementations of Explora, based on traditional database and distributed data processing setups, accounts for a decrease of up to 2 orders of magnitude in query latency compared to queries running on the base raw data at the expense of less than 10% query accuracy and 30% data footprint. The implementation of the framework on real smart city data along with the obtained experimental results prove the feasibility of the proposed approach.


BMC Genomics ◽  
2020 ◽  
Vol 21 (1) ◽  
Author(s):  
Onur Yukselen ◽  
Osman Turkyilmaz ◽  
Ahmet Rasit Ozturk ◽  
Manuel Garber ◽  
Alper Kucukural

1979 ◽  
Vol 21 (2) ◽  
Author(s):  
L. J. Heinrich

Der Beitrag erläutert das subjektive Verständnis des Begriffes ,,Computerleistung am Arbeitsplatz" als Schlagwort für eine progressive Gestaltungsphilosophie computergestützter Informationssysteme. Sie impliziert sowohl die Anwendung moderner Hard- und Softwaretechnologien, wie sie für die 80er Jahre bestimmend sein werden, als auch die in den Vordergrund rückende Berücksichtigung der sowohl von der Arbeitsaufgabe bestimmten als auch der subjektiven Benutzerbedürfnisse. Sie verbindet damit ,, Distributed Data Processing" als ein technologisches Konzept mit ..Benutzerorientierung". Die Gestaltungsbereiche der Benutzerorientierung - Arbeitsmittel und Arbeitsumwelt, Mensch- Computer-Interaktionsschnittstelle sowie die Arbeitsorganisation - werden erläutert. Gestaltungsmaßnahmen werden beispielhaft angegeben, und es wird auf die weiterführende Literatur verwiesen; dabei steht das im Oldenbourg- Verlag erschienene Buch ,,Computerleistung am Arbeitsplatz - benutzerorientiertes Distributed Data Processing" im Vordergrund.


Author(s):  
V.G. Belenkov ◽  
V.I. Korolev ◽  
V.I. Budzko ◽  
D.A. Melnikov

The article discusses the features of the use of the cryptographic information protection means (CIPM)in the environment of distributed processing and storage of data of large information and telecommunication systems (LITS).A brief characteristic is given of the properties of the cryptographic protection control subsystem - the key system (CS). A description is given of symmetric and asymmetric cryptographic systems, required to describe the problem of using KS in LITS.Functional and structural models of the use of KS and CIPM in LITS, are described. Generalized information about the features of using KS in LITS is given. The obtained results form the basis for further work on the development of the architecture and principles of KS construction in LITS that implement distributed data processing and storage technologies. They can be used both as a methodological guide, and when carrying out specific work on the creation and development of systems that implement these technologies, as well as when forming technical specifications for the implementation of work on the creation of such systems.


Sign in / Sign up

Export Citation Format

Share Document