Reading and analyzing data from sensors are crucial in many areas of life. IoT concepts and related issues are becoming more and more popular, but before we can process data and draw conclusions, we ...need to think about how to design an application. The most popular solutions today are microservices and monolithic architecture. In addition to this choice, there is also the question of the technology in which you will work. There are more and more of them on the market and in each of them it is practically possible to achieve similar results, but the difference lies in how quickly it will be possible and whether the approach invented will turn out to be the most optimal. Making the right decisions at the beginning of application development can determine its path to success or failure. The main goal of this article was to compare technologies used in applications based on microservice architecture. The preparation of a book lending system, whose server part was implemented in three different versions, each using a different type of technology, helped to achieve this goal. The compared solutions were: Spring Boot, Micronaut and Quarkus. The reason for this research was to investigate projects using sensor networks, ranging from telemedicine applications to extensive sensor networks collecting scientific data, or working in an environment with limited resources, e.g., with BLE or WIFI transmitters, where it is critical to supply energy to these transmitters. Therefore, the issue of efficiency and hence energy savings may be a key issue depending on the selected programming technology.
A radio relay communication system with a broadband noise-like signal is considered, which is characterized by increased noise immunity in both narrowband and broadband interferences, increased ...secrecy of information transmission, improved electromagnetic compatibility with neighboring electronic devices. Precipitation causes a significant attenuation of the signal, the greater the intensity of precipitation and the higher the operating frequency of the signal. The input of the decision device of the system receives a signal, the level of which and the signal-to-noise ratio is almost impossible to determine by calculations, because it passes a difficult path with re-radiation from random interference. There is no information in the literature on the direct determination of the signal-to-noise ratio and signal level. The method and scheme of the receiving-transmitting telecommunication system with the optimal reception of the noise-like information signal and the determination of the signal-to-noise ratio and the signal level are proposed. To do this, the noise power, total power and signal noise are measured and the signal-to-noise ratio and signal level are calculated, which is used as an error signal to create systems for automatic power control of radio relay transmitters. Schemes for construction of duplex and simplex radio relay communication systems with automatic power control of radio relay transmitters have been developed.
Actual research presents numerical simulation which has been run to define the acoustic forces and appropriate pressure distribution profile in a rectangular microfluidic channel. Standing acoustic ...wave was generated by standard IDT pair, formed on different piezoelectric substrates. The main aim of the numerical calculations was analyzing the stability of pressure nodes position for different Lab-chip design factors and operating parameters.
This research analyzes the main design parameters of microfluidic lab-chip device dedicated for detecting heavy metals in water samples. Mathematical model of a potentiometric microfluidic sensor, ...which includes the heat and mass transfer, fluid flow and ion exchange processes was developed and solved by FEM CAE tool
The separation of Suspended Microparticles based on physical and chemical properties is an essential step in numerous microfluidic applications. Recent research of acoustofluidic effects proves that ...acoustophoresis is an effective and flexible method for continuous sorting and separation of multiple beads, living cells, and suspended microparticles. The following research dedicated to the novel design of a microparticle sorter consisted of two pairs of IDT electrodes and provided precise sorting capabilities for multi-channel microfluidic structures. Modeling and FEM simulation of the soot and fly ash microparticles separation in CAD/CAE tools allow visualizing the multiphysical interactions between fluid flow, standing acoustic waves, and suspended microparticles in microfluidic Lab-chip devices.
This research presents Lab-Chip design for colorimetric detection of acidic and nitrate impurities in water/rainwater samples. Photocolorimetric method is analyzed and used for Lab-Chip point-of-care ...applications. Pressure, flow rate and reagents concentration distribution over microchannel system are simulated in COMSOL.
The paper presents the results of the simulations, which are focused on creating the geometry of the energy harvester. In addition, a detailed analysis of various piezoelectric materials is carried ...out in the interactive environment COMSOL. The work aimed to compare the experimental data of the thermal energy collection device operating based on piezoelectric transformation with the simulation results. The development process of designing the FEM model included the design of the chamber and piezo geometry as well as the investigations of the different PZT piezo components.
The paper proposes a part of extended research devoted to application of Lab-Chip devices for real-time monitoring of the water quality in rivers, pools, lakes, etc. The diagnostic Lab-Chip detects ...hazardous species due to chemical reactions and further detecting. The crucial point is precise heating of the reaction chamber and maintaining stable temperature despite the exothermic or endothermic nature of the reaction. The goal of actual work was modeling, simulation and analysis of integrated precise joule micro-heater for Lab-Chip diagnostic device.
The paper proposes the construction of a system for monitoring the parameters of the environment (water, air, precipitation) using wireless technologies. The greatest attention is devoted to design ...and analysis of Lab-chip module for rainwater chemical hazards monitoring system. The decisive point is the exact heating of the Lab-chip reaction chambers, the selection of the required pressure to provide the necessary temperature regime for chemical reactions that will determine the number of harmful substances.
In this research we propose a simulation study of the acoustophoretic motion of microplastic particles suspended in a water-filled microchannel. The mechanism of acoustofluidic microparticles sorting ...was analyzed in dedicated originally designed Lab-chip device. Under the action of acoustic waves, the microparticles are focused at the points of the acoustic pressure nodes and transported further for detection and analysis.
