scholarly journals Determination of Time and Order for Event-Based Middleware in Mobile Peer-to-Peer Environments

2005 ◽  
Author(s):  
E. Yoneki ◽  
J. Bacon
Keyword(s):  
Peer To Peer ◽  
Event Based

scholarly journals MACROSEISMICITY AND GEOLOGICAL EFFECTS OF THE WENCHUAN EARTHQUAKE (MS 8.0R - 12 MAY 2008), SICHUAN, CHINA: MACRO-DISTRIBUTION AND COMPARISON OF EMS1998 AND ESI2007 INTENSITIES

2017 ◽  
Vol 43 (3) ◽  
pp. 1361 ◽  
Author(s):  
E. Lekkas
Keyword(s):  
Wenchuan Earthquake ◽  
Comparative Evaluation ◽  
Large Scale ◽  
Seismic Intensity ◽  
Tectonic Structures ◽  
Seismic Fault ◽  
The Wenchuan Earthquake ◽  
Event Based ◽  
Seismic Hazard Estimation

The Wenchuan earthquake of the 12th of May 2008, in Sichuan county of China can be classified as a large scale event based on the tectonic structures that triggered the earthquake and the effects caused on the human, structural and natural environment. The aim of this paper is to present the geotectonic and seismotectonic regime of the earthquake affected region based on field data along the seismic fault zone and an attempt is made towards the: (i) estimation of the intensity values according to EMS1998 (European Microseismic Scale, 1998) and ESI2007 (Environmental Seismic Intensity Scale, 2007) and the determination of their geographical distribution in a macroscale, (ii) interpretation of the intensity values data and their distribution according to the seismotectonic, geodynamic and geotechnical regime, and (iii) conduction of a comparative evaluation review on the application of both EMS1998 and ESI2007. The application of both EMS1998 and ESI2007 and the comparative evaluation of the results indicate that the estimated values of EMS1998 and ESI2007 were almost in agreement, despite the fact that the geographical locations of assessment data were different suggesting that the application and use of both scales appears to represent a useful and reliable tool for seismic hazard estimation.

High Level Definition of Event-Based Applications for Pervasive Systems

2011 ◽  
pp. 128-172
Author(s):  
Steffen Ortmann ◽  
Michael Maaser ◽  
Peter Langendoerfer
Keyword(s):  
Energy Efficiency ◽  
Real Life ◽  
Ease Of Use ◽  
Design Flow ◽  
Sensor Nodes ◽  
Definition Of ◽  
High Level ◽  
Event Based ◽  
New Applications

Within pervasive intelligent environments, Wireless Sensor Networks (WSNs) will surround and serve us at any place and any time. A proper usability is considered essential for WSNs supporting real life applications. With this chapter, we aim at ease of use for specifying new applications that have to autonomously cope with expected and unexpected heterogeneity, sudden failures, and energy efficiency. Starting with general design criteria for applications in WSNs, we created a user-centric design flow for pervasive applications. The design flow provides very high abstraction and user guidance to refrain the user from implementation-, deployment- and hardware-details including heterogeneity of the available sensor nodes. Automatic event configuration is accomplished by using a flexible Event Specification Language (ESL) and Event Decision Trees (EDTs) for distributed detection and determination of real world phenomena. EDTs autonomously adapt to heterogeneous availability of sensing capabilities by pruning and subscription to other nodes for missing information. We present one of numerous simulated scenarios proving the robustness and energy efficiency with regard to the required network communications. From these, we learned how to deduce appropriate bounds for configuration of collaboration region and leasing time by asking for expected properties of the phenomena to be detected.

Serendipity Reloaded

2010 ◽  
pp. 90-118
Author(s):  
Daniel Cutting ◽  
Aaron Quigley
Keyword(s):  
Load Distribution ◽  
Peer To Peer ◽  
Client Server ◽  
Scale Free ◽  
P2p Systems ◽  
Large Numbers ◽  
Overlay Design ◽  
The Moment ◽  
Event Based ◽  
Distribution Problems

Client/server approaches to event-based message can scale to millions of users, but at great administrative and financial cost. By contrast, distributed peer-to-peer (P2P) systems offer the promise of smooth scalability from small to large numbers of participants without dedicated infrastructure. Some forms of event-based messaging, such as publish/subscribe, require events to be delivered to groups of consumers based upon their characteristics or interests. Such groups are undefined until the moment of publication and may be very large, posing significant delivery and load distribution problems in P2P environments. This chapter presents Ice, a structured P2P overlay design with scale-free properties that can be used to construct fairly loaded and efficient event-based messaging architectures.

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