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This paper presents voltage sags detection methods based on PMU (Phasor Measurement Unit) measurements. Voltage magnitude, phase angle jump, frequency deviation and RO-COF (Rate of Change of Frequency) are continuously monitored during the sag phenomena in order to analyse the capability of PMUs for the sag disturbance detection. Real time simulations using RTDS (Real Time Digital Simulator) are used...
In order to integrate a large number of distributed energy resources in distribution grids a robust decentralized information and communication control structure is required. This paper proposes an overlay peer-to-peer (P2P) architecture for controlling and monitoring microgrids in real time, which has a great capacity of adaptation to the demanding network requirements of these environments. The...
Healthcare is one of important factors for persons to keep their happiness during daily life. In order to maintaining good health conditions, daily continuous health monitoring is effective to find small symptoms before causing severe conditions. In this study, wearable, healthcare sensor sheets are proposed to monitor health conditions and activity, simultaneously, consisted of a skin temperature...
Open Platform Communication (OPC) also known as Object Linking and Embedding (OLE) for Process Control (OPC) is the platform for communication in automation and manufacturing fields among the group of networked devices. OPC standard supports the group of specifications known as OPC-Data Access (OPC-DA), OPC-Historical Data Access (OPC-HDA) and OPC-Unified Architecture (OPC-UA). In this paper, the...
Mobile health monitoring technology has the potential to bring a doctor’s office to the patient’s smartphone. In this context, we consider an end-to-end soft real-time out-ofhospital use-case that concerns transmission of patient ECG data from ST BodyGateway pulse sensor via an Android device (Patient App) to a Cloud server for ECG analysis and annotation and then to another Android device (Doctor...
This paper presents the design of the CASPER1 middleware architecture that enables the implementation of real-time QoE-driven service management. More in detail, we thoroughly describe the new modules, methods and functionalities that need to be integrated into the network providers' infrastructure, according to CASPER. Based on this architecture, future virtualized networks can provide a closed-loop...
Drowsy driving is the primary cause of motor vehicle accidents and is a risk factor that leads to the loss of human life, remaining as a challenge for the global automotive industry. Recently, drowsy monitoring system has been actively studied for prediction system based machine learning. However, the challenges of automotive real-time constraints and flexibility should be taken into consideration...
Wireless body sensors are increasingly used by clinicians and researchers, in a wide range of applications such as sports, space engineering and medicine. Monitoring vital signs in real time can dramatically increase diagnosis accuracy and enable automatic curing procedures, e.g. detect and stop epilepsy or narcolepsy seizures. Breathing parameters are critical in oxygen therapy, hospital and ambulatory...
This paper introduces a prototype new train driver advisory system, ETO (Energy-efficient train operation). ETO's main functions aim at advising train drivers to maintain an energy-efficient and punctual train operation. It adopts the multiple phase optimal control method and the pseudospectral method as the modelling and solution methods for train trajectory calculation. It provides advisory speeds...
Next generation Smart Cities have the potential to enhance the citizens quality of life and to reduce the overall energy expenditure. In particular, emerging smart metering technologies promise to greatly increase energy efficiency in the residential and industrial areas. In this context, new power metering methods such as Non-Intrusive Load Monitoring (NILM) can provide important real-time information...
This paper introduces an automated and reconfigurable laboratory environment for rapid prototyping of DC and AC microgrids. The laboratory includes seven fully programmable power converters, 47.5 kWh lithium-ion battery, configurable AC loads, a set of AC busbars with configurable network impedances between them, a set of DC busbars and relevant monitoring and control equipment. Each laboratory element...
Age of Information is a measure of the freshness of status updates in monitoring applications and update-based systems. We study a real-time sensing scenario with a sensor which is restricted by time-varying energy constraints and battery limitations. The sensor sends updates over a packet erasure channel with no feedback. The problem of finding an age-optimal threshold policy, with the transmission...
Using the automated vehicle location data combined with other technologies such as automated incident reporting, transit decision makers can now execute a variety of real-time strategies and performance evaluations. In this study, we show that it is possible to develop an easy to use but powerful web-based tool which acquires, stores, processes, and visualizes bus trajectory data. The developed web-based...
Big Data are having a great impact on the cities morphology and urban planning; actually, big data are used, for example, to predict the needs of the public transport system, by targeting investment and mobility policies within the main metropolis. Based on this assumption, this paper presents a Decision Support System (DSS) framework aimed at proposing travel strategies alternative to car use by...
Outage detection has been studied from different angles, such as active probing, analysis of background radiations, or control plane information. We approach outage detection from a new perspective. Disco is a detection technique that uses existing long-running TCP connections to identify bursts of disconnections. The benefits are considerable as we can monitor, without adding a single packet to the...
Many Cyber-Physical Systems (CPS) at different scales are being developed for a variety of applications that provide valuable interactions between the cyber world and the physical systems and environments. However, the development of these systems face many challenges due to the complexity of the applications. An appropriate middleware is needed to provide infrastructural support and assist the development...
After a contextualization of mobile applications, this paper presents a approach for real-time mobile application development. Through the presented approach it is proposed to use different hardware components and technologies accessible in mobile devices, namely WIFI, GSM, sensors as well as colored Petri nets for modeling the behavior of the system.
Network load-balancers generally either do not take application state into account, or do so at the cost of a centralized monitoring system. This paper introduces a load-balancer running exclusively within the IP forwarding plane, i.e. in an application protocol agnostic fashion - yet which still provides application-awareness and makes real-time, decentralized decisions. To that end, IPv6 Segment...
Nowadays, more and more enterprises and research institutes choose to build mini-datacenters and deploy private cloud environments to meet growing business and research needs. To make users can run different application frameworks on the same datacenter, Cao et al. [5] proposed a new service model named ClaaS (Cluster as a Service) and developed a lightweight prototype system named Docklet which is...
Time-lapse cameras provide valuable imagery for the study of the environment and ecosystems. In the case of glaciers, they can be used to monitor Glacial Lake Outburst Floods (GLOFs), ice calving of tidewater and freshwater fronts, ice velocity, glacier albedo and geometric changes. Custom-made time-lapse cameras from off-the-shelf components have been installed at glacier fronts in Fuego-Patagonia...
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