Marek Penhaker

HomeCare — Smart embedded biotelemetry system

HomeCare is a special monitoring system of the basic life functions. The system is based on basis of miniature sensors — smart sensors, information technologies and embedded computer systems. The man uses modified places where the monitoring systems that watch movement, position and chosen life functions are installed. In this case all the information about person’s basic life functions and geographical location (GPS) transmitted by GPRS technology. The values of SpO2, plethysmograph curves, EKG, blood pressure, exact health weight (EHW), respiration frequency, glycaemia and body temperature are measured after medical consultation. Furthermore the movement (falling, lying, sitting position, walking, jogging) and location is being monitored. All the measuring devices communicate with embedded microprocessor system wireless by Bluetooth or ZigBee technology. The ground is embedded microprocessor system that enables data capture from all used sensors does pre-processing and basic evaluation of states that threaten lives. All data including alarms are transmitted to control centre. Communication by Ethernet or LAN is secured during the monitoring indoor and in case of using the system outside the GSM and GPRS technology is used. The system uses OEM modules for measuring bio signals, which guarantee precise measure and compatibility.

Sensitivity analysis and application of transducers

The sensing of biological signal is very actual especially bioelectrical signals are commonly measured for evaluating the health status of man. This article is focused on analysis and design of transducers for long term bioelectric activity measurement with the advanced capabilities in transmission of signal, time-impedance stability, low half cell voltage. The principle of electrodes is conducting polymers witch can be built-up on textile or other non primary conducting materials. These types of sensors could be among others used in mobile humanpsilas telemetry systems and were tested in our laboratory and used in this telemetry project.

A combined negative selection algorithm-particle swarm optimization for an email spam detection system

Abstract Email is a convenient means of communication throughout the entire world today. The increased popularity of email spam in both text and images requires a real-time protection mechanism for the media flow. The previous approach has been limited by the adaptive nature of unsolicited email spam. This research introduces an email detection system that is designed based on an improvement in the negative selection algorithm. Furthermore, particle swarm optimization (PSO) was implemented to improve the random detector generation in the negative selection algorithm (NSA). The algorithm generates detectors in the random detector generation phase of the negative selection algorithm. The combined NSA–PSO uses a local outlier factor (LOF) as the fitness function for the detector generation. The detector generation process is terminated when the expected spam coverage is reached. A distance measure and a threshold value are employed to enhance the distinctiveness between the non-spam and spam detectors after the detector generation. The implementation and evaluation of the models are analyzed. The results show that the accuracy of the proposed NSA–PSO model is better than the accuracy of the standard NSA model. The proposed model with the best accuracy is further used to differentiate between spam and non-spam in a network that is developed based on a client–server network for spam detection.

Sensor Network for Measurement and Analysis on Medical Devices Quality Control

The theme is the long-term measurement and verification of technical correctness shaker function of blood derivatives with subsequent signal analysis. We are scanning and processing signals containing information about the vibration shakers grids. To capture these signals is used accelerometers and measured data is then transmitted wirelessly via ZigBee technology from the mixer to the computer where the data is transmitted using TCP/IP communication to remote sites in the measurements. The data from the server, then shared the results to clients for processing. As a measurement, visualization and communication software has been used LabVIEW, which allows you to connect and communicate with the database created.

Methods of Comparing ECG Reconstruction

The paper describes methods of comparing calculated ECG signal with real signal. Five examination methods of ECG-signal reconstruction from reduced system were proposed in this description. These methods prove reconstruction and evaluate results. They are based on statistic methods, nonparametric approaches and autoregressive models.

The HomeCare and Circadian rhythm

The HomeCare is a special monitoring system of the basic life functions. It has been primarily designed to take care for elderly people. But many of the designed devices could be used in the other branches of biotelemetry. Our HomeCare system is designed with respect to user comfort and it uses as cheap technical solutions as possible. In cooperation with the Ostrava University a Homecare Testing Flat has been realized. There are tested our Homecare solutions in vivo. This article is focused on the designed HomeCare system, on measured parameters and on used wireless technologies. The Circadian rhythm measurement and its usage in the HomeCare system are discussed in the article too.

Verification of Set Up Dual-Chamber Pacemaker Electrical Parameters

The measurement on a dual-chamber cardiostimulator consists of the construction of a unit for the simulation of the cardiac action in a patient’s body. It has an adjustable amplitude (0 - 20 mV), frequency (0 - 100 Hz) and mark-space ratio. The system output impedance should be in the range of 200 - 2000 Ω. It is possible to add a defined noise into the output channel. It is further possible to measure the tolerance of sensing of the atrial and ventricular channel of the dual-chamber cardiostimulator DDDR.

Nanogenerators for Human Body Energy Harvesting

Humans generate remarkable quantities of energy while performing daily activities, but this energy usually dissipates into the environment. Here, we address recent progress in the development of nanogenerators (NGs): devices that are able to harvest such body-produced biomechanical and thermal energies by exploiting piezoelectric, triboelectric, and thermoelectric physical effects. In designing NGs, the end-users comfort is a primary concern. Therefore, we focus on recently developed materials giving flexibility and stretchability to NGs. In addition, we summarize common fabrics for NG design. Finally, the mid-2020s market forecasts for these promising technologies highlight the potential for the commercialization of NGs because they may help contribute to the route of innovation for developing self-powered systems.

Notice of Retraction Controlling Peacemakers by Accelerometers

Presently is used for controlling pacemakers measuring by one vibration sensor or a movement sensor, which is placed on a pacemakers case or on a tip of stimulating electrode. As movement sensor is used a piezoelectric crystal or an accelerometer. Suggested solution uses two accelerometers placed on patients body so it is possible to extend a set of detected movements and also we can detect patients position (sitting, lying, standing position etc.). On the basis of suitable processing of measured data is pointed out patients physical activity, which is one of the main input parameters in algorithm for controlling pacemakers. Usage physical activity would significantly reduce an amount of parameters, which are entered by setting pacemakers.

Cotton fabric coated with conducting polymers and its application in monitoring of carnivorous plant response

The paper describes the electrical plant response to mechanical stimulation monitored with the help of conducting polymers deposited on cotton fabric. Cotton fabric was coated with conducting polymers, polyaniline or polypyrrole, in situ during the oxidation of respective monomers in aqueous medium. Thus, modified fabrics were again coated with polypyrrole or polyaniline, respectively, in order to investigate any synergetic effect between both polymers with respect to conductivity and its stability during repeated dry cleaning. The coating was confirmed by infrared spectroscopy. The resulting fabrics have been used as electrodes to collect the electrical response to the stimulation of a Venus flytrap plant. This is a paradigm of the use of conducting polymers in monitoring of plant neurobiology.