Many current location-based applications (LBA) such as friend finder services use information about the positions of mobile users. So-called location services (LSs) have been proposed to manage these mobile user posit...
详细信息
Today, massive amounts of streaming data from smart devices need to be analyzed automatically to realize the Internet of Things. The Complex Event Processing (CEP) paradigm promises low-latency pattern detection on ev...
详细信息
Recently, point clouds have been efficiently utilized for medical imaging, modeling urban environments, and indoor modeling. In this realm, several mobile platforms, such as Google Tango and Apple ARKit, have been rel...
详细信息
Recently, point clouds have been efficiently utilized for medical imaging, modeling urban environments, and indoor modeling. In this realm, several mobile platforms, such as Google Tango and Apple ARKit, have been released leveraging 3D mapping, augmented reality, etc. In modeling applications, these modern mobile devices opened the door for crowd-sourcing point clouds to distribute the overhead of data collection. However, uploading these large points clouds from resources-constrained mobile devices to the back-end servers consumes excessive energy. Accordingly, participation rates in such crowd-sensing systems can be negatively influenced. To tackle this challenge, this paper introduces our ComNSense approach that dramatically reduces the energy consumption of processing and uploading point clouds. To this end, ComNSense reports only a set of extracted geometrical data to the servers. To optimize the geometry extraction, ComNSense leverages formal grammars which encode design-time knowledge, i.e. structural information. To demonstrate the effectiveness of ComNSense, we performed several experiments of collecting point clouds from two different buildings to extract the walls location, as a case study. We also assess the performance of ComNSense relative to a grammar-free method. The results showed a significant reduction of the energy consumption while achieving a comparable detection accuracy. 2018 Association for Computing Machinery.
Entity resolution (ER) refers to the problem of finding which virtual representations in one or more data sources refer to the same real-world entity. A central question in ER is how to find matching entity representa...
详细信息
Existing road traffic information systems rely on fixed infrastructures to manage traffic data. The deployment and maintenance cost of such infrastructures, however, is very high. With on-board sensors and wireless sh...
详细信息
Providing fault tolerance support to client-to-server applications is critical in the data center and cloud computing *** provides a direct way of achieving high availability by encapsulating the protected application...
详细信息
Providing fault tolerance support to client-to-server applications is critical in the data center and cloud computing *** provides a direct way of achieving high availability by encapsulating the protected applications into the virtual machine and by periodically checkpointing the entire virtual machine (VM) state to the backup ***,existing VM replication solutions suffer from either excessive checkpointing overhead and network latency or unnecessary CPU resources consumption in backup *** this study,we exploit the ingredients of output packets and consider that the replication system maintains external consistency if the pre-released packets originate the already synchronized ***,we transform the active-active primary and slave VM combination into an active-semiactive one by shrinking the number of active virtual CPUs (vCPUs) in the slave *** former optimization mechanism improves the performance in read-mostly client-to-server networked applications,whereas the latter one relieves the problem of double scheduling in the slave ***,we proposed the COLO++ system which is built over COLO and is a non-stop service solution with coarse-grained lock-stepping VMs for client-to-server *** two plus signs represent two of the *** results using COLO++ implemented on KVM and Linux depict that it achieves nearly native VM performance under read-mostly workloads,as well as lower scheduling overhead in backup replication.
distributed Complex Event Processing has emerged as a well-established paradigm to detect situations of interest from basic sensor streams, building an operator graph between sensors and applications. In order to dete...
详细信息
Driven by the question how to identify potential communication partners and the need for well-suited communication schemes in agent-based systems, we discuss two communication concepts: sessions and global event manag...
详细信息
ISBN:
(纸本)3540628037
Driven by the question how to identify potential communication partners and the need for well-suited communication schemes in agent-based systems, we discuss two communication concepts: sessions and global event management. Sessions establish either actively or passively a context for inter-agent interactions. Communication partners are addressed by globally unique agent identifiers or via badges. Communication in sessions is based on RPC or message mechanisms. Global event management addresses the need for anonymous communication. Event managers are employed as a synchronization means within agent groups. Based on this approach, we introduce synchronization objects, - active components that offer various synchronization services. The presented model is finally mapped onto OMG event services.
Workstation clusters are being recognized as the main promising computing resource of the near future. A large size workstation cluster, consisting of locally connected workstations, has the power comparable to a supe...
详细信息
ISBN:
(纸本)3540593934
Workstation clusters are being recognized as the main promising computing resource of the near future. A large size workstation cluster, consisting of locally connected workstations, has the power comparable to a supercomputer, at a fraction of the cost. Further, a wide area coupling of workstation clusters is not only suitable for exchange of mail and news or establishment of distributed information systems, but can also be exploited as a large metacomputer. The wide area distribution aspects will be covered in a separate paper by the E=MC(2) project [8]. This paper shows the potential power by characterizing the system and the needs of current applications, and outlines the general idea to efficiently utilize networks of workstation. The second part of the paper introduces the approach of the HiCon project to solve the operating system and programming environment problems that currently restrict proper exploitation of workstation clusters, and demonstrates the feasibility by real measurement results. It concludes with general results for the research community in this area.
暂无评论