Optical sensor with liquid crystal sensitive element for monitoring acetone vapor during exhalation

Mykytyuk, Z.; Kremer, I; Ivakh, Mariia; Diskovskyi, Ivan; Khomyak, S. V.

doi:10.1080/15421406.2021.1905273

Cited by 8 publications

(5 citation statements)

References 19 publications

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“…The actual material collected and analyzed proved the possibility of developing a means of measuring movements in the joints of the lower limbs based on electronic IT resources. The design solution of the tool involves the use of a measuring line, which is built using the concept of capacitive sensors (Mykytyuk, Kremer, Ivakh, Diskovskyi, & Khomyak, 2021). The basis of the capacitive measuring line is a printed circuit board that integrates capacitive sensors, a switching line, and a signal converter (Mykytyuk, Barylo, Kremer, Kachurak, & Shymchyshyn, 2024).…”

Section: Resultsmentioning

confidence: 99%

Determining the Quality of Measuring the Level of Lower Extremity Joint Movement in Inclusive Physical Education Using Electronic IT Resources

Mykytyuk,

Blavt,

Iedynak

et al. 2024

Teor. metod. fiz. vihov.

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Objectives. The study aimed to investigate the quality characteristics of the tool developed based on electronic IT resources for measuring the level of movements in the joints of the lower limbs of students with disabilities caused by injuries. Material and methods. The experimental study involved 32 first-year students who had sustained lower limb injuries as a result of the war and were in remission. The methods used included analysis, synthesis, systematization, generalization, technical modeling, pedagogical experiments, and mathematical statistics. Results. A means of measuring movements in the joints of the lower limbs has been developed using electronic IT resources. The basis of the tool is a measuring line consisting of a printed circuit board on which is placed a design of capacitive sensors, a switching line, and a signal converter that measures the signal received by the sensors. The measurement results are transmitted to the controller and then to the PC via an interface implemented based on Bluetooth wireless technology. To implement the measuring tool, a controller is used, which has a board built on the synthesis of the Arduino electronic hardware platform and the Raspberry Pi minicomputer. The test results are displayed on the PC monitor screen. The determination of the qualitative characteristics of the test, in the case of recording the results of a tool developed on the basis of electronic IT resources for measuring the level of movements in the joints of the lower limbs of students with disabilities, established that the level of reliability of the test is above 0.90 (“excellent”) validity – from 0, 6 (“high”). Empirical data collected directly from the experiment have a low level of reliability: qualitative indicators of reliability in the range are below 0.70 (“may have limited applicability”), validity – < 0.3 (“low validity”). Conclusions. Developed based on electronic IT resources, the tool for measuring the level of movements in the joints of the lower limbs of students with disabilities due to limb injuries has significant advantages, such as the availability of functions, ease of use and efficiency. Ensuring high efficiency and objectivity of control contributes to performing control operations in real-time. By using assessment tools with a high level of reliability and validity, we ensure the detection of reliable changes in the state of the joints of the lower limbs of students with disabilities, thus eliminating the influence of errors in making managerial decisions in the planning process of their PE.

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Section: Resultsmentioning

confidence: 99%

Determining the Quality of Measuring the Level of Lower Extremity Joint Movement in Inclusive Physical Education Using Electronic IT Resources

Mykytyuk,

Blavt,

Iedynak

et al. 2024

Teor. metod. fiz. vihov.

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“…The microcontroller generates information about the time and frequency of leg movements. The novelty of the proposed development is that the device uses a high-performance microcontroller ATMega 328P of the "latest generation", which can support a wide range of sensors and has a large list of functions (Mykytyuk, Kremer, Ivakh, Diskovskyi, & Khomyak, 2021). This microcontroller contains an internal built-in 32 kB of flash memory, 23 input/output lines, configurable timers and counters, and 5 possible power-saving modes, with the ability to balance power consumption and performance.…”

Section: Resultsmentioning

confidence: 99%

Test Control of Inclusive Physical Education: Assessment Using the Newest Electronics

Blavt,

Iedynak,

Galamanzhuk

et al. 2023

Teor. metod. fiz. vihov.

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The purpose of the study was to determine the effectiveness of a device developed based on the latest electronics to control the coordination of movements of the lower limbs of students with disabilities. Materials and methods. 34 students with disabilities were involved in the study. At the time of the experiment, they had functional disorders of the lower limbs as a result of injuries and received a doctor’s permission to participate in the experiment. The research was conducted at the theoretical and empirical levels, using the following methods: analysis, synthesis, systematization, generalization, technical modeling, pedagogical testing, and mathematical statistics. Results. In the research process, a device was used, which was developed as part of the conducted research. The device consists of two rubber mats in which capacitive proximity sensors are placed. The test task involves recording the number of touches of rubber mats in 20 seconds. The information received from the sensors during the student’s performance of the test task, namely the alternate touching of the rubber mat with the big toe, is sent to the microcontroller via an infrared communication line. The development uses a high-performance microcontroller ATMega 328P, which can support a wide range of sensors and generate information about the time and frequency of leg movements. The signals of the student’s toes touching the rubber mats, received by capacitive sensors, are processed by a microcontroller and displayed on a PC through a serial connection and using the Arduino software, which allows reading the received information about the execution of movements. Under the conditions of the pedagogical experiment, we tried to determine the quality of the measurement results. According to the obtained numerical indicators, the numerical values of the test authenticity obtained by the traditional method of fixing the results by a specialist correspond to the value “low”. The results of the validity calculations showed that the correlation between the test measurement results and the evaluation results using the developed device was optimal with a correlation coefficient greater than 0.6. Conclusions. The importance of a high level of development of the coordination of movements of the lower limbs of students with disabilities is determined by the need to develop this quality to ensure the effectiveness of their rehabilitation in the process of inclusive PE. The analysis of the obtained material allows us to state that the practical application of the inclusive PE device developed based on the latest electronics will allow scientifically based optimization of this process to ensure its effectiveness.

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“…LC sensors have been used to measure glucose levels in blood, which is an important parameter for diabetes management. [83] These sensors have also been used to detect the [88] Copyright 2022, Springer.…”

Section: Hydroxypropyl Cellulose-based Responsive Photonic Structuresmentioning

confidence: 99%

“…LC sensors have been used to measure glucose levels in blood, which is an important parameter for diabetes management. [ 83 ] These sensors have also been used to detect the presence bacteria or virus in the human body, biological fluids as well as in the environment. [ 66,84 ]…”

Section: Hydroxypropyl Cellulose‐based Responsive Photonic Structuresmentioning

confidence: 99%

Cholesteric Liquid Crystals Sensors Based on Nanocellulose Derivatives for Improvement of Quality of Human Life: A Review

Leal‐Junior

Soares

Almeida

et al. 2023

Advanced Sensor Research

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This paper presents a review of cholesteric liquid crystal (CLC) sensors based on water and hydroxypropyl cellulose (HPC) mixtures for healthcare and human quality of life applications. First, an overview of the sensors system demands for healthcare and environmental sensing is presented in which there is also a discussion on the sensors technologies conventionally applied in these scenarios. Then, a discussion of the water‐HPC mixtures and the formation of the CLCs as well as their operation principle and fabrication methods is presented. Thereafter, the applications of such technologies for the assessment of different parameters related to biomechanics, medical conditions, and environment contamination are discussed in detail. Thus, the use of CLC sensors based on HPC membranes provides novel sustainable approaches for highly sensitive sensors systems with intuitive signal acquisition and analysis. For these reasons, one can envisage a widespread of such technologies due to the mentioned advantages in conjunction with low cost, flexibility in fabrication, simple signal processing, biocompatibility, and biodegradability.

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Optical sensor with liquid crystal sensitive element for monitoring acetone vapor during exhalation

Cited by 8 publications

References 19 publications

Determining the Quality of Measuring the Level of Lower Extremity Joint Movement in Inclusive Physical Education Using Electronic IT Resources

Determining the Quality of Measuring the Level of Lower Extremity Joint Movement in Inclusive Physical Education Using Electronic IT Resources

Test Control of Inclusive Physical Education: Assessment Using the Newest Electronics

Cholesteric Liquid Crystals Sensors Based on Nanocellulose Derivatives for Improvement of Quality of Human Life: A Review

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