scholarly journals Internet Data Distribution – extending real-time data sharing throughout the Americas

2006 ◽  
Vol 8 ◽  
pp. 91-95 ◽  
Author(s):  
T. Yoksas ◽  
W. Gambi de Almeida ◽  
D. Garrana Coelho ◽  
V. Castro Leon ◽  
T. Spangler
Keyword(s):  
Real Time ◽  
Data Distribution ◽  
Primary Source ◽  
Time Data ◽  
Local Data ◽  
Science Data ◽  
The Us ◽  
Real Time Data ◽  
Reliable Mechanism ◽  
The University

Abstract. The Unidata Program Center (Unidata) of the University Corporation of Atmospheric Research (UCAR) is involved in three international collaborations whose goals are extension of real-time data delivery-to and sharing-of locally held datasets-by educational institutions throughout the Americas. These efforts are based on the use of Unidata's Internet Data Distribution (IDD) system which is built on top of its proven Local Data Manager Version 6 (LDM-6) technology. The Unidata IDD is an event-driven network of cooperating Unidata LDM servers that distributes discipline-neutral data products in near real-time over wide-area networks. The IDD, a collaboration of over 150 mostly North American institutions of higher education, has been the primary source of real-time atmospheric science data for the US university community for over a decade,. In addition to providing a highly reliable mechanism for delivering real-time data, the IDD allows users to easily share locally held datasets.

Monetary Policy and Real-Time Data: The Case of Europe, Asia and the US

2006 ◽  
pp. 165-182
Author(s):  
Franz Seitz ◽  
Christina Gerberding ◽  
Andreas Worms
Keyword(s):  
Monetary Policy ◽  
Real Time ◽  
Time Data ◽  
The Us ◽  
Real Time Data

Novel Design of Collaborative Automation Platform Using Real-Time Data Distribution Service Middleware for an Optimum Process Control Environment

2016 ◽  
Vol 25 (06) ◽  
pp. 1650063 ◽  
Author(s):  
Sadiq M. Sait ◽  
Ghalib A. Al-Hashim
Keyword(s):  
Process Control ◽  
Real Time ◽  
Data Distribution ◽  
Regulatory Control ◽  
Optimum Process ◽  
Control Environment ◽  
Time Data ◽  
Control Applications ◽  
Real Time Data ◽  
Data Distribution Service

Refining and petrochemical processing facilities utilize various process control applications to raise productivity and enhance plant operation. Client–server communication model is used for integrating these highly interacting applications across multiple network layers utilized in distributed control systems. This paper presents an optimum process control environment by merging sequential and regulatory control, advanced regulatory control, multivariable control, unit-based process control, and plant-wide advanced process control into a single collaborative automation platform to ensure optimum operation of processing equipment for achieving maximum yield of all manufacturing facilities. The main control module is replaced by a standard real-time server. The input/output racks are physically and logically decoupled from the controller by converting them into distributed autonomous process interface systems. Real-time data distribution service middleware is used for providing seamless cross-vendor interoperable communication among all process control applications and distributed autonomous process interface systems. Detailed performance analysis was conducted to evaluate the average communication latency and aggregate messaging capacity among process control applications and distributed autonomous process interface systems. The overall performance results confirm the viability of the new proposal as the basis for designing an optimal collaborative automation platform to handle all process control applications. It also does not impose any inherent limit on the aggregate data messaging capacity, making it suitable for scalable automation platforms.

Novel Design of Heterogeneous Automation Controller Based on Real-Time Data Distribution Service Middleware to Avoid Obsolescence Challenges

2016 ◽  
Vol 25 (09) ◽  
pp. 1650111 ◽  
Author(s):  
Sadiq M. Sait ◽  
Ghalib A. Al-Hashim
Keyword(s):  
Real Time ◽  
Data Distribution ◽  
Partial Replacement ◽  
Limiting Factor ◽  
Input Output ◽  
Process Automation ◽  
Time Data ◽  
Automation Systems ◽  
Real Time Data ◽  
Data Distribution Service

Oil and gas processing facilities utilize various process automation systems with proprietary controllers. As the systems age; older technologies become obsolete resulting in frequent premature capital investments to sustain their operation. This paper presents a new design of automation controller to provide inherent mechanisms for upgrades and/or partial replacement of any obsolete components without obligation for a complete system replacement throughout the expected life cycle of the processing facilities. The input/output racks are physically and logically decoupled from the controller by converting them into distributed autonomous process interface systems. The proprietary input/output communication between the conventional controller CPU and the associated input/output racks is replaced with standard real-time data distribution service middleware for providing seamless cross-vendor interoperable communication between the controller and the distributed autonomous process interface systems. The objective of this change is to allow flexibility of supply for all controller’s subcomponents from multiple vendors to safeguard against premature automation obsolescence challenges. Detailed performance analysis was conducted to evaluate the viability of using the standard real-time data distribution service middleware technology in the design of automation controller to replace the proprietary input/output communication. The key simulation measurements to demonstrate its performance sustainability while growing in controller’s size based on the number of input/output signals are communication latency, variation in packets delays, and communication throughput. The overall performance results confirm the viability of the new proposal as the basis for designing cost effective evergreen process automation solutions that would result in optimum total cost of ownership capital investment throughout the systems’ life span. The only limiting factor is the selected network infrastructure.

scholarly journals The Gulf Stream Voyage: Using Real Time Data in the Classroom

2005 ◽  
Vol 39 (4) ◽  
pp. 90-95 ◽  
Author(s):  
Liesl Hotaling
Keyword(s):  
Learning Styles ◽  
Real Time ◽  
Gulf Stream ◽  
Primary Source ◽  
Data Sets ◽  
Time Data ◽  
Problem Solving Skills ◽  
Earth Systems ◽  
Real Time Data ◽  
History Of

The recent ingression of numerous scientific research sensor networks promises the potential to improve scientific knowledge and influence many societal issues including education. Until the availability of the Internet in classrooms, students used limited and outdated data sets to learn about dynamic earth systems. Internet access creates an important opportunity for students to obtain real-time data, providing them with engaging and up-to-date information. It is essential for research scientists to consider audiences beyond their own research community and think about how and where their data can be used for educational purposes, and to create engaging, clear, concise displays of data in an effort to reach non-scientific audiences. Scientific real-time data sources displayed in a "friendly" manner have been used in classrooms for several years resulting in the discovery of several significant educational advantages including: the infusion of inquiry-based learning, fostering problem solving skills, addressing several learning styles, and student relevance. As an example of ways in which scientific real-time data can be adapted for use in the classroom, this paper describes The Gulf Stream Voyage which is an Internet-based multidisciplinary project that utilizes both real-time data and primary source materials to help guide students to discover the science and history of the Gulf Stream.

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