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International Conference on Vibroengineering - 2015

作者： Stankiewicz, Marek Targosz, Jan Research and Development Center of Industrial Equipment CEBEA Tadeusz Kosciuszko Cracow University of Technology Juliusza Lea st. 114 Kraków30-133 Poland Faculty of Mechanical Engineering and Robotics AGH University of Science and Technology Al. Mickiewicza 30 Kraków30-059 Poland

The paper presents basic research which should be subjected to the material that could be used in vibration isolation system of engineering structures, or in the foundation systems of road or railways (tramways and train lines). These studies were carried out for number of types of elastic elements and the results thereof are available at work [1]. © JVE International Ltd.

关键词： Elasticity

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Briquetting of EAF Dust for its utilisation in metallurgical processes

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Chemical and Process Engineering - Inzynieria Chemiczna i Procesowa 2015年第2期36卷 263-271页

作者： Magdziarz, Aneta Kuźnia, Monika Bembenek, Michal Gara, Pawel Hryniewicz, Marek AGH University of Science and Technology Faculty of Metals Engineering and Industrial Computer Science 30 Mickiewicza Av. Krakow30-059 Poland AGH University of Science and Technology Faculty of Mechanical Engineering and Robotics Department of Manufacturing Systems 30 Mickiewicza Av. Krakow30-059 Poland

Dust generated at an electric arc furnace during steel production industry is still not a solved problem. Electric arc furnace dust (EAF) is a hazardous solid waste. Sintering of well-prepared briquetted mixtures in a shaft furnace is one of possible methods of EAFD utilisation. Simultaneously some metal oxides from exhaust gases can be separated. In this way, various metals are obtained, particularly zinc is recovered. As a result, zinc-free briquettes are received with high iron content which can be used in the steelmaking process. The purpose of the research was selecting the appropriate chemical composition of briquettes of the required strength and coke content necessary for the reduction of zinc oxide in a shaft furnace. Based on the results of the research the composition of the briquettes was selected. The best binder hydrated lime and sugar molasses and the range of proper moisture of mixture to receive briquettes of high mechanical strength were also chosen and tested. Additionally, in order to determine the thermal stability for the selected mixtures for briquetting thermal analysis was performed. A technological line of briquetting was developed to apply in a steelworks.

关键词： Zinc oxide

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Automated bubble-based assembly of cell-laden microgels into vascular-like microtubes

Automated bubble-based assembly of cell-laden microgels into...

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2015 IEEE/RSJ International Conference on Intelligent Robots and Systems (IROS)

作者： Xiaoming Liu Qing Shi Huaping Wang Tao Sun Ning Yu Qiang Huang Toshio Fukuda Intelligent Robotics Institute Beijing Institute of Technology Haidian District Beijing CHINA Faculty of Science and Engineering Meijo University Nagoya JAPAN

Fabrication of artificial blood vessels in micro scale significantly benefits the regeneration of functional human vascular networks. In this paper, we develop an efficient multi-microrobotic system with an innovative motorized sample holder (MSH) and two manipulators. Air is injected into the solution through a glass pipette fixed on one manipulator to create bubbles. These bubbles conduct a regular rising movement, which is utilized to assemble the 2D ring-shaped microgels fabricated in a simple micro fluidic device. With this novel bubble-based method and the robotic system, we achieve the automation of the assembly. A 1.2 mm long vascular-like microtube with an outer diameter of 200 μm is fabricated. The whole process of the bubble-based assembly is visually observed and analyzed with side view. Key parameters are characterized to improve the assembly. Results show that the automated bubble-based assembly success rate is 100% and average time cost of assembling every microgel is as low as 3.25s.

关键词： Assembly Manipulators Fabrication Lenses Transforms Blood vessels

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Robust control for valveless flow switching in microfluidic networks

Robust control for valveless flow switching in microfluidic ...

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IEEE/RSJ International Conference on Intelligent Robots and Systems

作者： Young Jin Heo Junsu Kang Wan Kyun Chung Robotics Laboratory school of Mechanical Engineering Pohang University of Science and Technology (POSTECH) Pohang Gyung-buk Korea Faculty of Mechanical Engineering Pohang University of Science and Technology Pohang Gyeongsangbuk-do KR

We propose a novel flow control method to realize flow regulation and valveless flow switching in a microfluidic network. The proposed controller enables precise regulation of flow rates (or velocity fields) in micro-channels regardless of model uncertainties such as cross-sectional area and microchannel configuration. The controller can also minimize the pressure exerted on the microfluidic chip. The proposed system can dramatically improve performances of flow regulation and can overcome the limitations of conventional pump systems for microfluidic devices.

关键词： Uncertainty Switches Artificial neural networks Ports (Computers) Numerical models Resistance

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Problems in estimation of hand grip force based on EMG signal

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Diagnostyka 2015年第2期16卷 21-26页

作者： Barański, Robert Grzeczka, Anna AGH University of Science and Technology Faculty of Mechanical Engineering and Robotics Adama Mickiewicza 30 Kraków30-059 Poland Gdańsk University of Technology Faculty of Mechanical Engineering Narutowicza 11/12 Gdańsk80-233 Poland

There has recently been a significant increase in the number of publications on and applications of bioelectric signals for diagnostic purposes. While the use of ECG (electrocardiography) is not surprising, the use of signals from registration of brain activity (EEG) and muscles activity (EMG) still finds new applications in various fields. The authors focus on the use of EMG signals for estimating hand grip force. Currently, EMG signals are broadly used in limb rehabilitation after severe injuries, surgeries, long immobilizations. Such parameters as maximal voluntary contraction (MVC) used for that purpose do not enable comparison of the forces generated by the muscles, for example, of two different people. It is connected, inter alia, with individual features of the studied person, as well as with a significant scatter of the measured EMG values for the same muscle, e.g. on different days of EMG measurements. The paper presents results of preliminary research whose final effect is to develop a procedure allowing force estimation in force units and estimation of the accuracy of the results. A series of tests was performed on two people. The tests showed the most important elements influencing disturbance of homogeneity of the obtained measurements with the same stimulation of the muscle. The authors focus only on determining hand grip force.

关键词： Muscle

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Effects of carbon dioxide on different PSK modulation formats of Optical Wireless Communications using USRP

Effects of carbon dioxide on different PSK modulation format...

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International Conference on Transparent Optical Networks

作者： Jan Vitasek Radek Martinek Ales Vanderka Lukas Hajek Jan Latal Zhenli Lu Bin Li Department of Telecommunications VSB-Technical University of Ostrava Ostrava Czech Republic Department of Cybernetics and Biomedical Engineering VSB-Technical University of Ostrava Ostrava Czech Republic Department of Telecommunications Faculty of Electrical Engineering and Computer Science VSB-Technical University of Ostrava 17. listopadu 15 708 33 Czech Republic State key Laboratoryof Robotics Chinese Academy of Sciences Shenyang China School of Electrical Engineering and Automation Changshu Instituteof Technology Changshu China

ISBN: (纸本)9781509014682

This article explores the influence of the concentrated carbon dioxide (CO 2 ) gas on the different Phase Shift Keying (PSK) modulations used for Optical Wireless Communication (OWC) links. In this work, the OWC consisted of a laser diode, a photodetector, and a transmission medium. The Universal Software Radio Peripheral (USRP) unit created and evaluated the PSK modulations. This unit modulated the laser diode on the transmitter side and demodulated the data which were received by the photodetector on the receiver side. The CO 2 gas was emitted as a consequence of sublimation of the solid carbon dioxide in hot water. The measurements were done in a closed box in laboratory. The CO 2 gas is a one element of smog which pollutes cities now and then. Our experimental results with CO 2 gas could help to choose a suitable modulation scheme for OWC which are installed in cities with smog-polluted atmospheric conditions.

关键词： Phase shift keying Carbon dioxide Optical receivers Diode lasers Integrated optics Optical transmitters

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Piezoelectric shunt damping for alpine ski traction improvement

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Diagnostyka 2014年第1期15卷 3-9页

作者： Rajek, Marcin Lubieniecki, Micha Pieczonka, Ukasz Uhl, Tadeusz AGH University of Science and Technology Faculty of Mechanical Engineering and Robotics Department of Robotics and Mechatronics Al. Mickiewicza 30 30-059 Kraków Poland

The paper investigates the problem of improving driveability of alpine skis. That properties depend largely on the vibration behavior of a ski under different snow conditions. There is a broad range of methods to deal with vibration damping, both active and passive, that have been described in the literature. In this paper the passive approaches were taken into consideration. It is due to the specific nature of the sport where use of external sources of energy may be impractical. Passive shunt damping system has been designed for a commercially available model of an alpine ski. The performance of the designed system has been evaluated on a numerical model of the ski. Piezoelectric patches have been included in the model by means of a generalized impedance that complies both the mechanical properties and shunted circuit electrical properties. The fraction of strain energy stored in a piezoelectric element at particular vibration modes were used to evaluate the maximum damping coefficient for first three resonant modes that have the largest influence on the ski properties. The damping system is based on piezoelectric patches that can be easily embedded in the laminated structure of a ski.

关键词： Damping

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New progress in neurofeedback for optimizing cognitive and behavioral performance

New progress in neurofeedback for optimizing cognitive and b...

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2015年中国生物医学工程联合学术年会

作者： Wenya Nan Feng Wan Vai Mang I Rosa Agostino Department of Electrical and Computer Engineering Faculty of Science and TechnologyUniversity of Ma Department of Bio Engineering Systems and Robotics InstituteUniversity of Lisbon1049-001

Neurofeedback(NF)training is an operant conditioning procedure which regulates brain activity for human cognition,peak performance and health *** paper briefly introduces the new progress in neurofeedback research in optimizing cognition and behavior performance including memory,peripheral vision,physical balance and brain computer interface(BCI)in our research group.

关键词： neurofeedback alpha beta/theta ratio brain computer interface cognition

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Alpha down-regulation neurofeedback effects in short term memory performance

Alpha down-regulation neurofeedback effects in short term me...

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2015年中国生物医学工程联合学术年会

作者： Wenya Nan Qi Tang Feng Wan Vai Mang I Rosa Agostino Department of Electrical and Computer Engineering Faculty of Science and TechnologyUniversity of Ma Department of Bio Engineering Systems and Robotics InstituteUniversity of Lisbon1049-001

Research objective: Regulation of brain activity by neurofeedback(NF)training has been widely applied in treatment of human psychological disorders,improvement of human cognitive performance and recently enhancement of brain-computer interfaces(BCIs)***,no study has investigated whether training the same EEG feature but with different training direction has the reverse effects on some *** alpha neurofeedback,it has been demonstrated that alpha up-regulation NF has positive effects on short term memory enhancement while alpha down-regulation NF could improve steady state visual evoked potential BCI ***,it is unknown whether alpha down-regulation NF has side effects on short term ***,this study aimed to investigate: 1)whether multi-session NF training can decrease alpha activity and 2)whether this NF training has side effects in cognitive test of short term ***: A total of 19 participants performed 10 sessions of individualized alpha down-regulation neurofeedback training with 5 sessions per *** session had three 1-min trials with an interval of 5 s between two consecutive *** and after the 5 sessions of NF training in each day,three 30-s eyes open and three 30-s eyes closed resting baselines were recorded.9 in 19 participants performed forward and backward digit span as short term memory assessment before and after all training *** were trained to decrease their amplitude in individual alpha band(IAB)which is defined as band ranges from peak alpha frequency(PAF)-4 Hz to PAF+2 ***: 14 out of total 19 subjects could decrease the training parameter,their IAB amplitude,over training *** terms of the cognitive performance,neither forward nor backward digit span performance had significant change between before and after the alpha down-regulation neurofeedback training,indicating that this type of training has no side effects in short term ***

关键词： neurofeedback down-regulation short term memory individual alpha band peak alpha frequency

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Method of wireless passive temperature measurement for diagnostic purposes

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Diagnostyka 2014年第2期15卷 3-6页

作者： Lisowski, Mateusz Gonek, Przemyslaw Uhl, Tadeusz AGH University of Science and Technology Faculty of Mechanical Engineering and Robotics Department of Robotics and Mechatronics Al. Mickiewicza 30 30-059 Krakow Poland

This paper presents the method of wireless passive temperature measurement by using the battery-free sensing platform based on RFID technology. Described platform serves as an interface between any sensor and standard RFID reader connected to the host computer. Utilizing the RFID technology working in high frequency band results in the possibility of providing energy from the reader to the sensing platform via magnetic coupling between their antennas and wireless data transmission of the measured data, even in the proximity of metal objects. Investigation related to the wireless temperature measurements of bearing supporting a rotating shaft are presented in this paper. Comparison with the measurements performed by using of an infrared camera shows high compliance of data obtained by using those two methods. The result demonstrates that presented wireless temperature measurement method could be attractive in many diagnostic purposes. © DIAGNOSTYKA 2014.

关键词： Temperature measurement

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