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Whilst Micro Aerial Vehicles (MAVs) possess a variety of promising capabilities, their high energy consumption severely limits applications where flight endurance is of high importance. Reducing energy usage is one of the main challenges in advancing aerial robot utility. To address this bottleneck in the development of unmanned aerial vehicle applications, this work proposes an bioinspired mechanical...
The wireless power transfer (WPT) systems, in conjunction with active implantable medical devices (AIMDs), belong to the most discussed topics in last years. Recently, the low frequency (inductive) or near-field electromagnetic energy transfer make the integration of AIMDs easier and simplified that supports their miniaturization. This paper deals with the possibilities of realization of the secondary...
This article presents design and analysis of a compact UWB antenna towards its integration together with UWB transceiver in a standard CMOS process. Even though, in implantable biomedical devices (IBD), the application of Ultra-Wideband (UWB) wireless technology as a possible low-power alternative to existing narrowband wireless approach has been already addressed, analysis of a miniaturized UWB antenna...
This paper analyzes the phenomenon of sympathetic interaction between transformers which is very likely to occur when a transformer is energized on to a system where are other transformers already connected. This interaction significantly changes the duration and the magnitude of the transient magnetizing currents in the transformers involved and may lead to maloperation of some power protections...
Dual, independent Vircators are currently being designed and fabricated that are to be driven by a single pulsed power source at the Center for Physical and Power Electronics at the University of Missouri-Columbia.
This paper introduces possible way of data acquisition needed for the new fault location method for medium voltage networks. Because the method is based on voltage drop detection, the analyses of factors influencing the accuracy of data acquisition are presented. Proposed detection circuit for voltage drop detection together with some testing results are described at the end of this paper as well.
Accurate and reliable information about the temperature of the synchronous generator excitation winding hot spot is necessary to determine the dynamic limit caused by excitation winding overheating in the PQ diagram. For good estimation of a position and the hot spot temperature it was decided to mount 19 temperature probes on one pole of the 6-pole, 400 kVA, 50 Hz synchronous generator. Due to a...
Excitation winding temperature is used for determination of the dynamic limit in the P-Q diagram of a synchronous generator. The surface temperature of an excitation winding can be measured by an infrared (IR) thermometer. Due to rotation, the IR thermometer absorbs thermal radiation from the excitation winding on the salient pole and from the interpolar space as well. These two surfaces can have...
In nature, many animals are able to jump, upright themselves after landing and jump again. This allows them to move in unstructured and rough terrain. As a further development of our previously presented 7 g jumping robot, we consider various mechanisms enabling it to recover and upright after landing and jump again. After a weighted evaluation of these different solutions, we present a spherical...
This paper refers with autosynchronous state machines from basic parameters and timing properties determination to design methodology description. Firstly the timing conditions are determined based on comparison with synchronous state machines timing. Next section describes design methodology. In this section the additional parts like stable state detector and local clock generator are introduced...
Jumping can be a very efficient mode of locomotion for small robots to overcome large obstacles and travel in natural, rough terrain. In this paper we present the development and characterization of a novel 5 cm, 7g jumping robot. It can jump obstacles more than 27 times its own size and outperforms existing jumping robots by one order of magnitude with respect to jump height per weight and jump height...
The following article describes the fundamentals of asynchronous logical systems from handshaking protocols to Muller pipeline. Understanding these fundamentals is important to analysing problems. The aim of this article is to solve problems with the design and simulation of asynchronous circuits. The final results are simulation models of a 4-phase bundled-data pipeline and a 4-phase dual-rail pipeline...
Planning, designing and efficiently managing health information systems (HIS) requires introduction of key technologies for successful operation. Information and communication technologies, could dramatically contribute to achieve better results in such activities. Health information exchange processes require stringent procedures and interoperability. It is of utmost importance to introduce key standards...
The purpose of this paper is to describe implementation of the system for secure data transfer in telemedicine based on a public key infrastructure. Data security plays a very important role in telemedicine and it is essential to have security issues in mind when designing such a system. System is based on some well known encryption principles, but it also contains new algorithms for medical images...
Unpowered flight can be used in microrobotics to overcome ground obstacles and to increase the traveling distance per energy unit. In order to explore the potential of goal-directed gliding in the domain of miniature robotics, we developed a 22cm microglider weighing a mere 1.5g and flying at around 1.5m/s. It is equipped with sensors and electronics to achieve phototaxis, which can be seen as a minimal...
Summary form only given. In the paper we propose a new adaptive predictor which is based on the blending of multiple static predictors on the dynamically classified causal set of neighboring pixels. The predictor models the image properties around the current, unknown pixel and adjusts itself to the local image region. The main contribution of this work is the enhancement of the well known approach...
In this paper we propose a new adaptive prediction scheme based on the blending of multiple static predictors on a dynamically classified causal context of neighboring pixels. The idea of predictor blends is further expanded through the determination of blending context that changes its shape on a pixel-by-pixel basis using a simple classification technique, thus allowing the modeling of more complex...
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