Gdynia Maritime University
Gdynia, Poland

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Agency: European Commission | Branch: H2020 | Program: RIA | Phase: DRS-09-2014 | Award Amount: 7.28M | Year: 2015

It is presently acknowledged and scientifically proven than climate related hazards have the potential to substantially affect the lifespan and effectiveness or even destroy of European Critical Infrastructures (CI), particularly the energy, transportation sectors, buildings, marine and water management infrastructure with devastating impacts in EU appraising the social and economic losses. The main strategic objective of EU-CIRCLE is to move towards infrastructure network(s) that is resilient to todays natural hazards and prepared for the future changing climate. Furthermore, modern infrastructures are inherently interconnected and interdependent systems ; thus extreme events are liable to lead to cascade failures. EU-CIRCLEs scope is to derive an innovative framework for supporting the interconnected European Infrastructures resilience to climate pressures, supported by an end-to-end modelling environment where new analyses can be added anywhere along the analysis workflow and multiple scientific disciplines can work together to understand interdependencies, validate results, and present findings in a unified manner providing an efficient Best of Breeds solution of integrating into a holistic resilience model existing modelling tools and data in a standardised fashion. It, will be open & accessible to all interested parties in the infrastructure resilience business and having a confirmed interest in creating customized and innovative solutions. It will be complemented with a webbased portal.The design principles, offering transparency and greater flexibility, will allow potential users to introduce fully tailored solutions and infrastructure data, by defining and implementing customised impact assessment models, and use climate / weather data on demand.

Agency: European Commission | Branch: FP7 | Program: MC-IRSES | Phase: FP7-PEOPLE-2013-IRSES | Award Amount: 319.20K | Year: 2014

This proposal intends to deliver a basement for networking, staff exchanging and joint seminars and workshop between partners, who all deal with the problem of tribology aspects of micro-bearings including friction and lubrication of micro-pairs and friction of micro-joints in conical, spherical, cylindrical, parabolic and hyperbolical micro-bearings. The aim is shaping a focus group for further cooperation and joint scientific researches in the mentioned field. Microbearings are used today in different fields: bioengineering and biotechnology, industrial Micro Elements and Micro Systems (MEMS), Micro Power Units (MPU) and Micro Engines (ME), control systems and actuators and many others. Moreover, there are numerous analogies between bio-bearings (for example knees) and micro-bearings in their hydrodynamic behavior, lubrication processes and tribological aspects. Development of nanoscience and application of nanotechnology enabled the researchers to understand these properties better and deeper. However, still there are many unanswered questions regarding behavior and properties of these contact surfaces. More important is, of course, control of these features by an active method, as these physical parts are very small with very low time constants and conventional control systems are not able to satisfy the requirements like stability and quality of their response. The program includes staffs exchanging between partners from EU and TC based on an almost equal scheme, joint seminars and workshops, as well as final presentations for each period of Exchange.

Detka K.,Gdynia Maritime University | Gorecki K.,Gdynia Maritime University
Przeglad Elektrotechniczny | Year: 2014

This paper refers to considerations of the influence of self-heating in the choking-coil on characteristics of a boost converter. The electrothermal model of the choking-coil dedicated for SPICE is presented. Some results of calculations of characteristics of the boost converter obtained with self-heating in the choking-coil taking into account and at omitting this phenomenon are shown. Results of calculations are compared with results of measurements. Investigations are performed for choking-coils made from powdered iron. © 2014, Wydawnictwo SIGMA - N O T Sp. z o.o. All rights reserved.

Gorecki K.,Gdynia Maritime University | Gorecka K.,Gdynia Maritime University
Przeglad Elektrotechniczny | Year: 2011

In the paper the experimental results illustrating the influence of selfheating and mutual thermal interactions between power LEDs on electrical and optical properties of these diodes are presended. Power LED emitting white light and operating separatelly, as well as situated in common case or on the common heat-sink with other power LED is considered. Some suggestions for the designers of LED light sources are formulated.

Filipowicz W.,Gdynia Maritime University
Przeglad Elektrotechniczny | Year: 2012

Uncertain data are used in navigation, thanks to the nautical knowledge position is then fixed and evaluated. Data processing is rather limited since traditional mathematical apparatus based on probability theory with necessary assumptions is not flexible enough to include knowledge and ignorance into position fixing calculation scheme. Limited possibility is available regarding fix accuracy evaluation. In the paper possibilistic extension of Mathematical Theory of Evidence is explored as new platform enabling modeling and solving problems with uncertainty.

The method of analysis and classification of time-vary signals based on the adaptive signal decomposition, using the matching pursuit algorithm was presented. Determinants of the accuracy of the adaptive approximation of measuring signal, representing the magnetic field induction waveform were considered. The way of identification of the sources of the low-frequency magnetic field on the basis of an analysis of time-frequency structures, occurring in the adaptive spectrogram was proposed. © 2015, Wydawnictwo SIGMA - N O T Sp. z o.o. All rights reserved.

In the paper the new form of the average electrothermal model of the boost converter dedicated for SPICE is proposed. To the description of the properties of considered converter the previously elaborated by the author the electrothermal average model of the diode-transistor switch and new average non-linear electrothermal model of the choking-coil are applied. The form of the new model of the choking-coil is presented and some results of calculations of non-isothermal characteristics of considered converter obtained by means of the new model of choking-coil and average models of this converter well-known from the literature, are presented. © 2015, Wydawnictwo SIGMA - N O T Sp. z o.o. All rights reserved.

Strzelecki R.,Gdynia Maritime University | Adamowicz M.,Gdynia Maritime University
Przeglad Elektrotechniczny | Year: 2010

The aims of the latest research on new power electronics topologies and systems are to obtain maximum efficiency to improve control properties and to extend the range of application. Authors propose new topologies of cascaded quasi-Z-source inverters to improve the range of operatea voltages particularly in renewaoie source applications.

This paper discusses the regulation of a stand-alone wind power plant based on a self-excitation squired-cage induction machine. A shunt connected active rectifier and a controllable dump load are used for regulation of the voltage and frequency. A control scheme for the active rectifier with independent control of active and reactive power is presented. The feasibility of the proposed system is verified by simulations.

Paper presents continuous average model of power surge compensator, based on a four level diode clamped inverter. The model is suitable for synthesis of control algorithms, as well for simulation of ship’s power conditioning unit designed to an active power surge smoothing in isolated power plants. © 2016, Wydawnictwo SIGMA - N O T Sp. z o.o. All rights reserved.

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