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A new optical fiber curvature sensor dominated by three-core single mode fiber (TCSMF) is proposed and demonstrated. The sensing structure is formed by cascading multimode fiber (MMF), TCSMF and MMF together, namely, the SMF-MMF-TCSMF-MMF-SMF structure. Three core modes in the TCSMF interfere with each other and then form the interference spectrum. The interference phase difference is changed due...
This paper describes the usage of IDDX monitors, which provide (periodic) data to be employed for predicting the remaining life-time of processor cores in homogeneous multi-processor SoCs during their lifetime. This forms the basis of self-repair with no down time for these SoCs and dramatically improving their dependability. This goal is accomplished by combining the optimally designed health monitors,...
CPS, that consist of a cyber part – a computing system – and a physical part – the system in the physical environment – as well as the respective interfaces between those parts, are omnipresent in our daily lives. The application in the physical environment drives the overall requirements that must be respected when designing the computing system. Here, reliability is a core aspect where some of the...
The viability of Chinese HY-2A scatterometer in monitoring and studying typhoons is discussed in this paper by investigating 67 typhoon cases over the Northwestern Pacific Ocean from 2012–2014. A typhoon center detection algorithm based on the product of the divergence and vorticity of the wind vector field is presented, and the detected typhoon center positions show good agreement with the vortex...
In this paper, functional unit-based IDDT testing has been applied for a 90nm VLIW processor to monitor its aging degradation. This technique can provide health data for reliability evaluation as used in e.g. prognostic software for lifetime prediction. The test-program development based on the architecture of a single DSP processor, as well as implementation of an accelerated test (AT) is investigated...
An embedded health-monitoring infrastructure for a highly reliable MP-SoC for data-streaming systems is presented. Different from the traditional approach of a dependable design, our infrastructure is based on life-time prognostics from health-monitoring sensors that are embedded near the target processor. This enables the preventive repair by spare parts or priority ranking of tasks among processors...
A new generation of highly dependable multi-processor Systems-on-Chip for safety-critical applications under harsh environments with zero down-time is emerging. In this paper1, the approach towards reaching this ultimate goal is explained. Crucial is this method is linking the measurement data of so-called (on-chip) health monitors during life time with the measurements of degrading key performance...
To provide a long-term monitoring, low cost, easy operation, and accurate physiological signal detection system, this paper proposes an approach based on Empirical Mode Decomposition (EMD) algorithm for breathing and heartbeat monitoring. The control section of system is based on DSP platform, and interactive interface is based on android platform. This paper optimizes the traditional EMD algorithm...
Scientific workflow management systems have been around for many years and provide essential support such as management of data and task dependencies, job scheduling and execution, provenance tracking, etc. to scientific computing. While we are entering into a """"big data"""" era, it is necessary for scientific workflow systems to integrate with Cloud platforms...
Scientific applications are growing rapidly in both data scale and processing complexity due to advances in science instrumentation and network technologies, where Cloud computing as an emerging computing paradigm can offer unprecedented scalability and resources on demand, and is getting more and more adoption in the science community. We present our early effort in designing and building CloudDragon,...
The semiconductor industry for automotive applications is growing rapidly. This is because advanced electronics is now being developed to monitor and control many vital functions previously handled purely mechanical. In addition hybrid and pure electrical cars are emerging. Parts of these electronic systems have strict safety-critical requirements, while operating in a harsh environment. Although...
Located in the inland arid regions of northwest China, Malian River Basin suffers an intensive conflict of supply and demand of water resources. And it encounters an even worse situation because of its brackish water which affects the utilization of the water. The feasibility of desalination of the brackish water is analyzed and then a new harnessing strategy is proposed, based on a longtime monitoring...
Cloud computing is gaining tremendous momentum in both academia and industry. The application of Cloud computing, however, has mostly focused on Web applications and business applications; while the recognition of using Cloud computing to support large-scale workflows, especially data-intensive scientific workflows on the Cloud is still largely overlooked. We coin the term "Cloud Workflow",...
In data-centric wireless sensor networks, the malicious nodes may selectively drop some crucial data packets, which seriously destroy the network's data collection and decrease the availability of sensor services. In this paper, we present a lightweight defense scheme against selective forwarding attacks. According to characteristics of easy positioning the nodes around transmission paths in a structured...
Grid is a promise technology which could easily share distributed heterogeneous computing resources. It brings together geographically and organizationally dispersed computational resources. This paper presented a framework that aggregated the spatial resources based on grid technology, OGC specification and spatial data index. First, a grid environment for sharing geospatial data resources was setup...
A rapid emergency response system is designed to deal with emergent medical event based on wireless sensor networks (WSN) technology so as to ensure remote dependable and timely medical treatment. This paper proposes a hybrid media access mechanism, which exploits strong synchronization scheme and accordingly possesses high reliability to transmit data. Using Kalman filter mechanism to weaken the...
In this paper, the necessity of the establishment of risk management system for construction enterprises is expounded first, and then a new risk management concept for construction enterprises on projects is proposed through the analysis on the construction enterprise risk management theory and practical experience on the basis of the progress of construction enterprises. The new risk management concept...
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