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Hardware-based courses, like Robotics, require a lot of laboratory practice. Traditional laboratory exercises on a robotics course are held in a robotics laboratory equipped with proper hardware. Today, besides this kind of traditional laboratories, modern trends are virtual and remote laboratories where simulators are used. In this paper our experiences on the Robotics course, at the Faculty of Computer...
Simple information lookup tasks (e.g. “What the weather like in London?” or “What is the population of the UK?”), are currently well supported with traditional search engines, and more recently with intelligent personal assistants. Intensive knowledge tasks, (e.g. “How do countries with low GDP per capita rank in emigration?”), however, require combining and cross referencing data from multiple sources...
Mobile video consumption and applications are limited by the bandwidth of the communications channel and the resources on the devices. In this work, the latter limitations are alleviated through the use of the Cloud to render high definition video in free-viewpoint applications. A Cloud-based system is developed to port the free-viewpoint application into a distributed and multithreaded environment...
File carving tools carry out file recovery whenever the file-system meta-data is not available, which makes them a valuable addition to the cyber crime investigator's toolkit. Existing file carvers either cannot handle fragmented files or require a probabilistic model derived using a number of training images. This training data may not always be feasible to aggregate or its sheer size could undermine...
This paper presents a time-interleaved continuous time Sigma-Delta converter, which uses 4 identical channels clocked at equally shifted time moments of a 4 GHz clock. The data in each channel is filtered and afterwards recombined in a multiplexer, leading to an output signal at 4 GHz before decimation. Time-interleaving as proposed in this paper makes it possible to increase the signal-to-noise and...
Railway communications are essential nowadays enabling passengers to stay connected to entertainment as well as other bandwidth-demanding applications. This is particularly challenging because wireless communication standards are not fully customized to overcome railway environment challenges including high handover frequency, group handover and Quality of Service (QoS) guarantees. In this paper,...
The increasing number of polluting loads requires higher power quality (PQ) in the generation, transmission and distribution systems. In order to improve the power quality, the power disturbances should be monitored continuously. Power quality monitoring and analysis must be able to detect and classify the disturbances on the electrical system. A new method for optimal features selection and classification...
An algorithm for volumetric calibration is developed and verified practically by measuring of all geometric errors after numerical compensation. In this paper, analysis of the contribution of each of 9 translational and 9 rotational position dependent errors and each of 3 position independent errors in total displacement error vector is presented. Changing only one of the errors, and keeping all the...
The main goal in this paper is to obtain low power consumption of wireless sensor nodes and collected distributed data in environmental parameters monitoring. Communication module and the controller should be in idle state as long as possible when they are not active. In design and development of Wireless Sensor Networks (WSNs), one of the main challenges is to achieve long lasting battery lifetime...
The paper gives an elaborated proposal that the extended paradigm of discrete digital measurement, in addition to the standard sampling method (SSM), should also include stochastic digital measurement method (SDMM).
Vehicular Ad-hoc Networks (VANETs) have a significant potential to enable new applications among multiple types of vehicles. In these networks, the Medium Access Control (MAC) plays an important role in providing an efficient communication channel. Currently, existing standards use the PHY and MAC of IEEE 802.11p, which is fully distributed and based on Carrier Sense Multiple Access with collision...
Metrological evaluation of electrical power quality signal generator, designed for reproducing the standard power quality disturbances, is presented in this paper. This generator is functionally based on the virtual instrumentation software, data acquisition card and power amplifier for scaling the output voltage to the nominal power line voltage level (230 V). The realized computer-based signal generator...
In this paper, a modernized sophomore level course in Electrical Measurements is described. The course is customized to electronics majoring students and recognizes the fact that computers influenced electrical measurements: most of the instruments are microcontroller based nowadays, and all the measurement data are processed by computers, at least to type them down. Eight novel laboratory exercises...
This article presents dynamic thermal rating system named SUMO which has been developed in Slovenia in order to improve system security and enable optimal utilization of the existing power system infrastructure. It is a modern information system that produces real time and close future estimations of actual thermal capacities. Currently, power systems mostly operate using static thermal capacity limits...
Partitioning of electric networks into zones or areas is a procedure that has numerous applications in power system planning, operation and control. Spectral clustering based approaches are among the most favoured ones to solve the partitioning problem. Applications of spectral clustering include definition of control zones, analysis of connectivity structure of power networks, intentional controlled...
The paper describes the High Precision Stochastic Digital Measurement Method that takes the advantage of fast electronic components in order to simplify and cut the costs of hardware used for electric energy measurements, whereas reducing the number of error sources in instruments. It is shown that the key element in this system is the fast Flash ADC. For every new bit of Flash ADC resolution, its...
The imbalance between consumption and demand, caused by the integration of intermittent renewable energy sources (ReS), increases the need of Ancillary Services (AS) for frequency support (FS). This imbalance is still regulated with the help of conventional generation, by procuring reserves for frequency support. However, as the aim is to increase the share of RES in electricity generation, they would...
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