Pressure mapping provides knowledge about interface pressure between a person and the surface person is laying or sitting on. In medical applications the surface is commonly a bed or a wheelchair. The distribution of pressure applied to the skin by a supporting surface can be measured with a pressure mapping system. Depending on the magnitude and duration of the pressure, it can cause pain and tissue injuries, such as pressure ulcers to the person. By means of pressure mapping technology, it is possible to detect the areas where the pressure is concentrated and thus prevent the development of pressure ulcer. However, the properties of the commercial pressure mapping systems are usually inadequate for physiological measurements. In this study, properties of a commercial Xsensor pressure mapping system were studied. Measurements with test persons as well as measurements with a constant measurement load were carried out. Repeatability, sensitivity, temperature sensitivity and hysteresis of the pressure sensor were determined. Only the hysteresis was noticed to be poor while the other properties were satisfactory.

The paper presents different methods of combining many neural classifiers into one ensemble system for recognition and classification of arrhythmia. Majority and weighted voting, Kullback-Leibler divergence and modified Bayes methods will be presented and compared. The numerical experiments will be performed for the problems concerning the recognition of different types of arrhythmia on the basis of ECG waveforms of MIT BIH AD.

The paper presents an imaging reflectometer designed to detect flicker-induced reflectance changes of the ocular fundus. The system is based on a modified fundus camera completely controlled by a personal computer via USB interface.
The system allows in-vivo functional imaging of the ocular fundus in the near-infrared region with flicker light stimulus in the visible spectrum.

The authors present a model of the respiratory system in forced expiration as an answer to the unknown pressure pulse excitation. The model has the form of a voltage divider circuit, where gas flow volume velocity is the current reaction (or the volume is the voltage reaction). The analysis is presented in time domain. The model’s finding is realized in two main stages. In the first stage an RCL net is built. On the basis of this structure the exciting signal is found in the form that the answer to the model is V(t) (or Q(t)), very similar to the real object’s answer, in the minimum mean-square-criterion.

A mini TPW system was introduced as an excellent way to measure the errors in the calibration system of a secondary level temperature laboratory. In this paper, the structure and operation of this system is briefly introduced. Also, its performance is discussed. The mini TPW system was directly compared to a traditional TPW cell. The difference between the mini TPW system and the traditional TPW cell was found to be less than 0.3 mK using an SPRT. The expanded (k = 2) uncertainty of the mini TPW system is better than 0.5 mK. Several thermometers with different structures were tested in the system. Errors seen with the different thermometers between the mini TPW system and the traditional TPW system are reported.