This paper deals with accelerated life tests and a verification of technical parameters of an innovated electromechanical relay intended for applications in railway signalling and interlocking.

Single cuff noninvasive blood pressure (BP) measurements performed manually or automatically are subject to errors. We developed an experimental system that uses two cuffs in order to improve accuracy of noninvasive BP measurement. This study concentrated on a novel determination of diastoli...

This paper presents advanced modulation technique for three-phase three-level ANPC inverter for drive applications. The Design of the converter allows actively balance the losses in the converter which results in higher power density, increase of reliability and lifetime of the converter. Th...

Problems with implementation of complex track circuit design methods are described in this paper. These complex track circuits are called branched TCs, because they consist of several branches, mostly equipped with receivers. The adjustment table design of these TCs is therefore more co...

This paper deals with the influence of electrically conductive adhesive amount on shear strength of joints glued by EPO-TEK® H20S and MG 8331S. These joints were made by gluing of chip resistors 1206, 0805 and 0603 with two curing profiles for each adhesive. The different ...

The article describes and compares various digital methods for measurement of short delay between fast analogue signals. A brief characterization of measured signals is given in the first chapter. In the second chapter, there are described various measurement methods. In the third chapt...

4G networks to utilize Voice over LTE (VoLTE). VoLTE uses similar authentication mechanisms such as HTTP. It is therefore possible that a web client on the mobile device will use for authentication mechanism originally designed for the VoLTE [10]. I.e. to use the AKA mechanism...

This paper introduces control algorithm of three-phase seven level cascaded H-bridge operates as voltage source active rectifier. The proposed control strategy combines PI and PR controllers with mathematical model of converter current loop and provide direct current control with voltage balancin...

A method of finding the temperature dependences of physical parameters of metals is proposed and discussed. The method is based on the combination of measurement of the surface temperature of the material and subsequent solution of the inverse problem using the multi-parametric optimiza...

This paper presents the results of in-orbit commissioning of the first Czech technological CubeSat satellite of VZLUSAT-1. The 2U nanosatellite was designed and built during the 2013 to 2016 period. It was successfully launched into Low Earth Orbit of 505km altitude on June 23,...

BACKGROUND: Results of national physical fitness survey of Czechoslovak population were published in 1976. The survey was part of International Biological Program IBP. The results are used as standards for evaluating fitness level and cardio-respiratory capacity of subjects till now. OBJECTIVES:&...

The Timepix3 readout chip - the latest member of the Medipix family of hybrid pixel detectors - brought several new functionalities in comparison with the older Timepix, i.e. a high hit-rate, a time granularity of 1.5625 ns, a data-driven readout scheme (with a per pixel ...

The article is devoted to the physical nature of geomagnetism, magnetic storms and methods of predicting their origin and deals with geomagnetic induced currents called GIC (Geomagnetically Induced Currents) and their effect on power transformers. A simplified, single-phase transmission system is...

We describe the technical design and show results of first measurements of a network based on the Timepix3 and the Katherine readout (with Gigabit Ethernet interface) installed in the ATLAS cavern in the LHC in January 2018. The network consists of four Timepix3 detectors, arr...

A model of hybrid cladding on a cylindrical surface is built and numerically solved. Heating of both substrate and the powder material to be deposited on its surface is realized by laser beam and preheating inductor. The task represents a hard-coupled electromagnetic-thermal problem...

The VZLUSAT-1 satellite, the first Czech CubeSat, was successfully launched on June 23, 2017, to a 510 km Sun-synchronous low-Earth orbit. It carries several scientific payloads including a Timepix detector as focal plane imager for the X-Ray telescope onboard. The Timepix detector cont...

Purpose: A novel technique for control of complex physical processes based on the solution of their sufficiently accurate models is presented. The technique works with the model order reduction (MOR), which significantly accelerates the solution at a still acceptable uncertainty. Its advanta...

A dedicated synchronization bus has been developed and integrated into the FITPix COMBO device. It can be used as Timepix read-out (involving back-side-pulse acquisition) or as a simple spectrometer device—Spectrig (when an external single pad sensor is connected, e.g. Δ E detector). Th...

This paper focuses on the development of a fully programmable morphological coprocessor for embedded devices. It is a well-known fact that the majority of morphological processing operations are composed of a (potentially large) number of sequential elementary operators. At the same time,&#x...

A novel approach to designing dummy loads has been proposed that simplifies practical construction and simultaneously offers a satisfactory impedance matching over a wide frequency band for high-power radio-frequency applications. The concept involves a gradual impedance transformation of the guided&#...