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Journal articles on the topic 'Measurements and monitoring'

Author: Grafiati

Published: 10 March 2023

Last updated: 31 July 2025

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1

Markuze, Yu I., Anh Cuong Le, Thi Thu Nguyen, and Hai Nam Dinh. "Monitoring coarse measurement errors and initial data." Geodesy and Cartography 937, no. 7 (2018): 11–16. http://dx.doi.org/10.22389/0016-7126-2018-937-7-11-16.

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Rough errors are a consequence of the observer’s miscalculations, device malfunctions, their displacements at the time of measurement, incorrect measurement techniques chosen, rapid and sharp deterioration of external conditions and other causes. That is why, one of the problems in the theory of mathematical processing geodetic measurements is culling measurements containing gross errors. In the last two decades received recursion equalization has been widespread. It enables evaluating the unknown while new measurements are added to the network and measurements with gross errors are deleted [3

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2

Waidson, Mike. "HDTV Measurements and Monitoring." SMPTE Journal 111, no. 2 (2002): 71–79. http://dx.doi.org/10.5594/j16390.

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Hujo, Ľ., Z. Tkáč, J. Tulík, J. Kosiba, D. Uhrinová, and M. Jánošová. "Monitoring of operation loading of three-point linkage during ploughing." Research in Agricultural Engineering 62, No. 1 (2016): 24–29. http://dx.doi.org/10.17221/10/2015-rae.

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The research was focused on operational measurements of tractor plough tools and their subsequent utilisation and simulation under laboratory conditions by a hydrostatic simulator. In this field, theoretical and experimental works were focused on tractors, whereby the proposal of laboratory test arose out of the loading characteristics of the three-point linkage of the tractor. These characteristics were obtained from the agricultural tractor&rsquo;s operation in plough aggregation. Measurements were performed with the following tools: tractor with carrier-mounted four-mouldboard plough PH

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Menzel, Tobias, and Wolfgang Potthast. "Validation of a Unique Boxing Monitoring System." Sensors 21, no. 21 (2021): 6947. http://dx.doi.org/10.3390/s21216947.

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Much development work and scientific research has been conducted in recent years in the field of detecting human activity and the measurement of biomechanical performance parameters using portable sensor technologies, so-called wearable systems. Despite the fact that boxers participating in one of the most vigorous and complex disciplines of all sports, it is one of the disciplines where no noteworthy, advanced performance analytic tools are used for training or for competition purposes worldwide. This research aimed to develop and validate a comprehensive punch performance sensor system for t

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P, Tuccimei. "mproving Gas Permeability Measurements for Environmental Monitoring and Management." Open Access Journal of Waste Management & Xenobiotics 2, no. 2 (2019): 1–11. http://dx.doi.org/10.23880/oajwx-16000123.

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Intrinsic permeability is a crucial parameter to interpret soil gas data recorded from monitoring stations in different environmental settings. It is also fundamental for environmental management and pollution reme diation. An improved version of a permeameter (PRM3) recently developed for environmental applications is presented and calibrated against a reference instrument (RADON - JOK produced by RADON v.o.s.). The innovations of this prototype are: i) the absence of the flow meter, and ii) a membrane pump in place of a rotary vane device. Proper calculation of the permeability from Darcy’s

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Skrzypczak, Izabela, Janusz Kogut, Wanda Kokoszka, and Dawid Zientek. "Monitoring of Landslide Areas with the Use of Contemporary Methods of Measuring and Mapping." Civil And Environmental Engineering Reports 24, no. 1 (2017): 69–82. http://dx.doi.org/10.1515/ceer-2017-0005.

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Abstract In recent years, there is an increase of landslide risk observed, which is associated with intensive anthropogenic activities and extreme weather conditions. Appropriate monitoring and proper development of measurements resulting as maps of areas at risk of landslides enables us to estimate the risk in the social and economic aspect. Landslide monitoring in the framework of SOPO project is performed by several methods of measurements: monitoring of surface (GNSS measurement and laser scanning), monitoring in-deepth (inclinometer measurements) and monitoring of the hydrological changes

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Whitehill, Andrew R., Melissa Lunden, Brian LaFranchi, Surender Kaushik, and Paul A. Solomon. "Mobile air quality monitoring and comparison to fixed monitoring sites for instrument performance assessment." Atmospheric Measurement Techniques 17, no. 9 (2024): 2991–3009. http://dx.doi.org/10.5194/amt-17-2991-2024.

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Abstract. Air pollution monitoring using mobile ground-based measurement platforms can provide high-quality spatiotemporal air pollution information. As mobile air quality monitoring campaigns extend to entire fleets of vehicles and integrate smaller-scale air quality sensors, it is important to address the need to assess these measurements in a scalable manner. We explore the collocation-based evaluation of air quality measurements in a mobile platform using fixed regulatory sites as a reference. We compare two approaches: a standard collocation assessment technique, in which the mobile platf

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Setiawan, Foni Agus, and Yuli Sudriani. "System Engineering for Online Monitoring and Early Warning of Water Environment." Jurnal INKOM 9, no. 2 (2016): 49. http://dx.doi.org/10.14203/j.inkom.422.

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Measurement activity usually performed at a time or in a certain time period. In the case of measurements at one time, measurements manually by visiting the location of measurements, take measurements and write them down, then left the location is not a problem. However, measurements made within a certain period of time or year would be verydraining, costly, and time consuming if perfomed manually. Thus, design and implementation of embedded system for online monitoring and early warning of water environment is proposed. The system consists of two parts i.e. monitoring stations (site) and moni

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Michel, Chris, and Sina Keller. "Advancing Ground-Based Radar Processing for Bridge Infrastructure Monitoring." Sensors 21, no. 6 (2021): 2172. http://dx.doi.org/10.3390/s21062172.

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In this study, we further develop the processing of ground-based interferometric radar measurements for the application of bridge monitoring. Applying ground-based radar in such complex setups or long measurement durations requires advanced processing steps to receive accurate measurements. These steps involve removing external influences from the measurement and evaluating the measurement uncertainty during processing. External influences include disturbances caused by objects moving through the signal, static clutter from additional scatterers, and changes in atmospheric properties. After re

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Fišák, J., J. Chum, J. Vojta, and K. Bartůňková. "Automatic Monitoring of the Amount of Deposited Precipitation." Journal of Hydrometeorology 14, no. 2 (2013): 670–76. http://dx.doi.org/10.1175/jhm-d-12-073.1.

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Abstract An automatic device for measurement of the amount (weight) of deposited precipitation developed at the Institute of Atmospheric Physics, Academy of Sciences of the Czech Republic, is described. Examples of measurements of various types of deposited precipitation are presented. The paper also discusses the response of the measuring instrument to falling precipitation and the influence of wind on the measurements. The results of first measurements proved that the instrument is suitable for automatic and continuous monitoring of deposited precipitation.

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11

Hicks, J. M. "In situ monitoring." Clinical Chemistry 31, no. 12 (1985): 1931–35. http://dx.doi.org/10.1093/clinchem/31.12.1931.

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Abstract In situ monitoring has been increasingly accepted during the past five years. This approach has been applied to measurement of gas tensions such as pO2 and pCO2, to pH and ions, to the assessment of jaundice by measurement of bilirubin, and to analysis for 14CO2 after administration of labeled antipyrine and aminopyrine, for evaluation of hepatic damage. Various techniques have been developed for in situ monitoring: transcutaneous measurements, implantable sensors, ingestible radio-sensitive pills, and breath analysis. Here I review some of these approaches and their limitations. Thes

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Kapalo, Peter, Orest Voznyak, Vasyl Zhelykh, Hanna Klymenko, and Khrystyna Myroniuk. "AIR QUALITY MONITORING IN A SELECTED CLASSROOM." Theory and Building Practice 2022, no. 1 (2022): 71–79. http://dx.doi.org/10.23939/jtbp2022.01.071.

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As part of the research entitled "Experimental determination of the optimal amount of air in a selected room in Ukraine based on measurements of carbon dioxide concentration", an experimental measurement was performed in a selected school room in Ukraine. The aim of the experimental measurement was to determine the course of air temperature, relative humidity and carbon dioxide concentration during the teaching process. From the carbon dioxide concentration curves, it is possible to calculate the required ventilation intensity in the room. This article documents the results of measuring the ai

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Abbasi, Saddam Akber. "Monitoring Analytical Measurements in Presence of Two Component Measurement Error." Журнал аналитической химии 69, no. 11 (2014): 1123–29. http://dx.doi.org/10.7868/s0044450214110127.

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Abbasi, Saddam Akber. "Monitoring analytical measurements in presence of two component measurement error." Journal of Analytical Chemistry 69, no. 11 (2014): 1023–29. http://dx.doi.org/10.1134/s1061934814110100.

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Sysyn, Mykola, Olga Nabochenko, Ulf Gerber, Vitalii Kovalchuk, and Oleksiy Petrenko. "COMMON CROSSING CONDITION MONITORING WITH ON BOARD INERTIAL MEASUREMENTS." Acta Polytechnica 59, no. 4 (2019): 423–34. http://dx.doi.org/10.14311/ap.2019.59.0423.

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A railway turnout is an element of the railway infrastructure that influences the reliability of a railway traffic operation the most. The growing necessity for the reliability and availability in the railway transportation promotes a wide use of condition monitoring systems. These systems are typically based on the measurement of the dynamic response during operation. The inertial dynamic response measurement with on-board systems is the simplest and reliable way of monitoring the railway infrastructure. However, the new possibilities of condition monitoring are faced with new challenges of t

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Niranjana, Ms E. "Cough Monitoring with Cardiopulmonary Measurements." International Journal for Research in Applied Science and Engineering Technology 8, no. 5 (2020): 117–21. http://dx.doi.org/10.22214/ijraset.2020.5020.

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Brettle, Mike. "Future measurements for climate monitoring." Weather 70, no. 10 (2015): 301–2. http://dx.doi.org/10.1002/wea.2524.

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18

Altundas, Yusuf Bilgin, and Nikita Chugunov. "Multiphysics fluid monitoring: Toward targeted monitoring design under uncertainty." Interpretation 6, no. 3 (2018): SG19—SG32. http://dx.doi.org/10.1190/int-2017-0180.1.

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Properly designed multiphysics measurements program can improve the accuracy of fluid front monitoring (FFM) by combining tools with various spatial resolutions and desired contrast in time-lapse measurements, consequently enabling better sweep efficiency and increased oil recovery. We have introduced a new workflow for multiphysics FFM feasibility studies that determines the suitability of measurements considered for monitoring and enables informed decision making on where, when, and how often the measurements need to be performed. The workflow integrates petrophysically and thermodynamically

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Oakley, RE, B. Olivier, GE Eyster, and JG Hauptman. "Experimental evaluation of central venous pressure monitoring in the dog." Journal of the American Animal Hospital Association 33, no. 1 (1997): 77–82. http://dx.doi.org/10.5326/15473317-33-1-77.

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The measurement of central venous pressure (CVP) will provide objective information about intravascular blood volume. Limitations exist with direct and indirect methods of measuring CVP; however, the purpose of this study was to determine if such factors as catheter size, patient position, or measurements taken with either a water manometer or a strain-gauge transducer would affect the accuracy of CVP measurements. The study population consisted of six adult, mixed-breed dogs. Catheter sizes evaluated were 16- and 19-gauge. Patient positions evaluated were right and left lateral recumbencies.

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Piccolo, Arianna, Yann Lecieux, Sylvie Lesoille, Pierre Teixeira, Johan Bertrand, and Dominique Leduc. "Performance Assessment of Distributed Strain Sensing Techniques for Convergence Monitoring of Radioactive Waste Repository." Sensors 23, no. 1 (2022): 398. http://dx.doi.org/10.3390/s23010398.

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This paper presents the measurement methodology of diameter reduction monitoring of micro-tunnel structures used for radioactive waste storage based on distributed strain measurements along fiber optic sensors installed on the circumference. The whole measurement procedure is described: the calibration of the sensors for use in harsh environment (temperature and radioactivity), the measurement analysis technique, the performance assessment of different measurement systems on a surface mock-up and the in-situ validation on an underground structure. The performances of Brillouin and Rayleigh bac

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Majcherczyk, Tadeusz, Zbigniew Niedbalski, and Artur Ulaszek. "Roadway Stability Evaluation on the Basis of Modern Monitoring of Displacement." Studia Geotechnica et Mechanica 37, no. 1 (2015): 45–52. http://dx.doi.org/10.1515/sgem-2015-0006.

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Abstract The paper presents the application of a 3D laser measurement technology in a modern monitoring of roadways. The authors analyze the possibility of using a three-dimensional scanning measurement of longwall working dimensions. The measurement results are presented in the form of a cloud of points obtained from a 3D laser scanning. The paper also presents a comparison of the results obtained from the convergence of traditionally-made measurements with the measurements derived from the threedimensional scanning and discusses possible methods of comparing different point clouds.

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Vasylenko, Mykola. "Soil Parameters Monitoring System." Electronics and Control Systems 3, no. 81 (2024): 36–40. http://dx.doi.org/10.18372/1990-5548.81.18988.

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Soil parameters monitoring is vital for different areas such as climatological and ecological studies, agriculture, etc. Large scale measurement systems are based on satellite technologies however their spatial and temporal resolutions still must be improved for real-time measurement tasks and control of local areas. Such systems also require in-situ measurements for calibration. It rises the need of local sensor networks development. The paper proposes a soil monitoring system which allows measuring temperature and humidity. Wireless communication between sensors and data collection unit allo

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Wei, Yukun, Anders B. Lundberg, and Fredrik Resare. "Systematic slope stability assessment through deformation field monitoring." E3S Web of Conferences 92 (2019): 18009. http://dx.doi.org/10.1051/e3sconf/20199218009.

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Field monitoring is frequently carried out during excavations and other geotechnical activities and provides additional information during the execution of a construction project. The interpretation of field monitoring data is often obscured by measurement noise and disturbance, and a systematic approach to assess both the quality and implications of the field monitoring data is very helpful in geotechnical practice. The possibility to infer practical conclusions from the field monitoring data depends on the type of field measurements, especially in monitoring of the stability of slopes. Pore

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Lamy, Kévin, Marion Ranaivombola, Hassan Bencherif, et al. "Monitoring Solar Radiation UV Exposure in the Comoros." International Journal of Environmental Research and Public Health 18, no. 19 (2021): 10475. http://dx.doi.org/10.3390/ijerph181910475.

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As part of the UV-Indien project, a station for measuring ultraviolet radiation and the cloud fraction was installed in December 2019 in Moroni, the capital of the Comoros, situated on the west coast of the island of Ngazidja. A ground measurement campaign was also carried out on 12 January 2020 during the ascent of Mount Karthala, located in the center of the island of Ngazidja. In addition, satellite estimates (Ozone Monitoring Instrument and TROPOspheric Monitoring Instrument) and model outputs (Copernicus Atmospheric Monitoring Service and Tropospheric Ultraviolet Model) were combined for

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Vargas, M., A. Guisasola, J. Lafuente, C. Casas, and J. A. Baeza. "On-line titrimetric monitoring of anaerobic–anoxic EBPR processes." Water Science and Technology 57, no. 8 (2008): 1149–54. http://dx.doi.org/10.2166/wst.2008.140.

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Denitrifying phosphorus accumulating organisms (DPAO) are able to remove nitrogen and phosphorus simultaneously. The use of DPAO in EBPR systems results in a substantial saving on aeration cost and a lower sludge production when compared to anaerobic–aerobic EBPR systems. This process is usually studied in sequencing batch reactors (SBR) and monitored with off-line measurements. However, off-line monitoring implies low frequency data sampling and delay between sampling and obtainment of the results. For this reason, an online measurement such as titrimetry is strongly recommended to improve th

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Malinowski, Pawel, Tomasz Wandowski, and Wieslaw Ostachowicz. "Guided Waves for Aircraft Panel Monitoring." Key Engineering Materials 558 (June 2013): 107–15. http://dx.doi.org/10.4028/www.scientific.net/kem.558.107.

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The reported research concerns experimental investigation toward the monitoring of an aircraft panel. Guided wave propagation phenomena were used to obtain information about the state of the monitored structure. A curved aluminium panel with rivets was investigated. Piezoelectric transducer was used to excite guided waves in chosen structural element. The generated signal was amplified before applying it to the transducer in order to ensure measurable amplitude of excited guided waves. Measurement of the wave field was realized using laser scanning vibrometer that registered the velocity respo

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Kenis, Karine, Paul Mertens, Efrain Altamirano-Sanchez, Joost Van Ongeval, and Marie De Vita. "Monitoring of Trace Molecular Impurities in Clean-Room Air." Solid State Phenomena 346 (August 14, 2023): 183–88. http://dx.doi.org/10.4028/p-bh3umg.

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A new measurement system has been introduced to perform real-time measurements of molecular air contaminants at different location in a clean room down to a concentration of approximately 0.1 ppb. The system consists of an air sampling unit coupled to a proton transfer mass spectrometer and a Cavity Ring-Down Spectrometer. The measurements show that the time average concentrations of more than 10 different volatile impurity molecules exceed 1 ppb.

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Pasternak, Grzegorz, Janina Zaczek-Peplinska, Klaudia Pasternak, et al. "Surface Monitoring of an MSW Landfill Based on Linear and Angular Measurements, TLS, and LIDAR UAV." Sensors 23, no. 4 (2023): 1847. http://dx.doi.org/10.3390/s23041847.

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Surface monitoring of landfills is crucial not only during their operation but also for later land restoration and development. Measurements concern environmental factors, such as leachate, migration of pollutants to water, biogas, and atmospheric emissions, and geotechnical factors, such as stability and subsidence. Landfill subsidence can be measured using modern surveying techniques. Modern measurement methods for landfill body displacement monitoring and their control after restoration and adaptation as recreational areas include terrestrial laser scanning (TLS), and scanning and low-altit

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Nixdorf, Erik, Daniel Eggert, Peter Morstein, Thomas Kalbacher, and Doris Dransch. "Tocap: a web tool for ad-hoc campaign planning in terrestrial hydrology." Journal of Hydroinformatics 24, no. 2 (2022): 274–94. http://dx.doi.org/10.2166/hydro.2022.057.

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Abstract Planning an event-based monitoring campaign on the regional scale is challenging, e.g. the timing and location of monitoring visits can dramatically impact monitoring efficacy and depends on the optimal environmental conditions required by the measurement parameters and the overarching monitoring goal. Therefore we developed a generic campaign planning approach utilizing interactive visualization methods and implemented this approach into the component-based web tool called Tocap: Tool for Campaign Planning. As a case study, we determine the most suitable time and location for event-d

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Juellyan, Juellyan, Bambang Setiawan*, Muttaqin Hasan, Ashfa Achmad, Alfiansyah Yulianur, and Taufiq Saidi. "Long-term Monitoring of Low-cost Seismometers: Consistency Analysis of The Instrument." Aceh International Journal of Science and Technology 13, no. 1 (2024): 43–56. http://dx.doi.org/10.13170/aijst.13.1.38248.

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Instruments have become an essential part of conducting a study or research. With the aid of instruments, the measurement process can be faster, more efficient, and more accurate. However, an instrument also has a limited service life. Over time, the performance of the instrument will degrade. Therefore, the equipment must be regularly maintained and calibrated periodically. This research aims to test the measurement consistency of a low-cost seismometer (RS-3D). The approach involves long-term measurements to assess the instrument's stability in taking measurements. The measurement data is th

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Wang, Dongxu, Wenhui Sha, Yingwen Hu, et al. "A Review of Research Progress in Carbon Monitoring and Carbon Metering Methods: Comparison at Home and Abroad." Processes 12, no. 12 (2024): 2669. http://dx.doi.org/10.3390/pr12122669.

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Carbon monitoring and carbon measurement are not only important foundations for realizing the marketization of carbon trading, but also a key link in realizing China’s strategic “dual carbon” goal. The aim of this research is to comprehensively summarize and compare carbon monitoring and carbon metering technologies, as well as to analyze their current status and challenges. This study adopts literature research, comparative analysis, case analysis, policy interpretation, and other methods to comprehensively and deeply explore the relevant content of carbon monitoring and carbon metering techn

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Moore, C., A. Barnard, P. Fietzek, et al. "Optical tools for ocean monitoring and research." Ocean Science 5, no. 4 (2009): 661–84. http://dx.doi.org/10.5194/os-5-661-2009.

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Abstract. Requirements for understanding the relationships between ocean color and suspended and dissolved materials within the water column, and a rapidly emerging photonics and materials technology base for performing optical based analytical techniques have generated a diverse offering of commercial sensors and research prototypes that perform optical measurements in water. Through inversion, these tools are now being used to determine a diverse set of related biogeochemical and physical parameters. Techniques engaged include measurement of the solar radiance distribution, absorption, scatt

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Moore, C., A. Barnard, P. Fietzek, et al. "Optical tools for ocean monitoring and research." Ocean Science Discussions 5, no. 4 (2008): 659–717. http://dx.doi.org/10.5194/osd-5-659-2008.

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Abstract. Requirements for understanding the relationships between ocean color and suspended and dissolved materials within the water column, and a rapidly emerging photonics and materials technology base for performing optical based analytical techniques have generated a diverse offering of commercial sensors and research prototypes that perform optical measurements in water. Through inversion, these tools are now being used to determine a diverse set of related biogeochemical and physical parameters. Techniques engaged include measurement of the solar radiance distribution, absorption, scatt

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Sijgers, Leanne, Marlies Geys, Gunnar Geissler, Patrick Boyle, Alexander Huber, and Flurin Pfiffner. "Electrical Bioimpedance-Based Monitoring of Intracochlear Tissue Changes After Cochlear Implantation." Sensors 24, no. 23 (2024): 7570. http://dx.doi.org/10.3390/s24237570.

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Background: This study examined electrical bioimpedance as a biomarker for intracochlear tissue changes after cochlear implant surgery, comparing monopolar, three-point, and four-point impedance measurements over time and evaluating different measurement systems and approaches. Methods: Impedance measurements were obtained from 21 participants during surgery and at four postoperative stages. Monopolar impedances were recorded using the Bionic Ear Data Collection System (BEDCS) and the Active Insertion Monitoring (AIM) system. Three- and four-point impedances were recorded directly using BEDCS,

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Siegel, Martin, Christoph Kattmann, Chandra Prakash Beura, Michael Beltle, and Stefan Tenbohlen. "Partial Discharge Monitoring of Power Transformers by Calibrated UHF Measurements." Journal of Energy - Energija 72, no. 4 (2024): 19–27. http://dx.doi.org/10.37798/2023724514.

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Partial discharge (PD) measurement is an established technique to detect local defects in the oil/paper insulation. They can be measured by electrical PD measurements according to IEC 60270 or by electromagnetic measurements in the ultra-high frequency range (UHF: 300 MHz – 3 GHz). The electromagnetic emissions of PD are recorded using an UHF sensor which is inserted into the transformer tank. The importance of PD measurements is reflected in the standard for charge-based electrical measurements (IEC 60270). Because of the standard, apparent charge, QIEC, became an essential factor for determi

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Coker, S. A., S. J. Oh, and Y. C. Shin. "In-Process Monitoring of Surface Roughness Utilizing Ultrasound." Journal of Manufacturing Science and Engineering 120, no. 1 (1998): 197–200. http://dx.doi.org/10.1115/1.2830101.

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This paper presents the capability of an ultrasonic system for the in-process surface roughness measurement of machined parts. The system uses a focused ultrasonic transducer to measure the reflected amplitude variation of an ultrasonic beam incident on the surface. The robustness of the system is examined by applying the technique to different machined surfaces and investigating the effect of various coupling fluids. Experimental results show that the technique is applicable to the surfaces produced by most production processes. In addition, the capability of in-process measurements is demons

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Zhang, Xingfu, Yongyi Zhang, Lei Zhang, Guangxin Qiu, and Dehong Wei. "Power Transmission Tower Monitoring with Hydrostatic Leveling System: Measurement Refinement and Performance Evaluation." Journal of Sensors 2018 (December 30, 2018): 1–12. http://dx.doi.org/10.1155/2018/4176314.

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A hydrostatic leveling system (HLS) is an automated high-accuracy measurement technology widely used for vertical displacement monitoring. This paper focuses on evaluating the performance of HLS for monitoring the deformation of a power transmission tower base together with a slope sensor and displacement meter. The monitoring results show that HLS measurements are strongly affected by the environmental temperature. Therefore, to obtain the actual deformation of a monitoring target, the measurements should be further processed to reduce the effect of temperature on the result. To this end, fou

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Strömbergsson, D., P. Marklund, K. Berglund, and P.-E. Larsson. "Property requirements of vibration measurements in wind turbine drivetrain bearing condition monitoring." Insight - Non-Destructive Testing and Condition Monitoring 63, no. 11 (2021): 667–74. http://dx.doi.org/10.1784/insi.2021.63.11.667.

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Wind turbine drivetrain bearing failures continue to lead to high costs resulting from turbine downtime and maintenance. As the standardised tool to best avoid downtime is online vibration condition monitoring, a lot of research into improving the signal analysis tools of the vibration measurements is currently being performed. However, failures in the main bearing and planetary gears are still going undetected in large numbers. The available field data is limited when it comes to the properties of the stored measurements. Generally, the measurement time and the covered frequency range of the

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Weigand, Maximilian, Egon Zimmermann, Valentin Michels, Johan Alexander Huisman, and Andreas Kemna. "Design and operation of a long-term monitoring system for spectral electrical impedance tomography (sEIT)." Geoscientific Instrumentation, Methods and Data Systems 11, no. 2 (2022): 413–33. http://dx.doi.org/10.5194/gi-11-413-2022.

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Abstract. Spectral electrical impedance tomography (sEIT) is increasingly used to characterise the structure of subsurface systems using measurements in the megahertz to kilohertz range. Additionally, hydrogeophysical and biogeophysical processes are characterised and monitored using sEIT. The method combines multiple, spatially distributed, spectroscopic measurements with tomographic inversion algorithms to obtain images of the complex electrical resistivity distribution in the subsurface at various frequencies. Spectral polarisation measurements provide additional information about the syste

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Orman, Maciej, and Cajetan Pinto. "Vibration, Sound and Thermal Analysis as a Condition Monitoring Methods for Electric Motors." Applied Mechanics and Materials 239-240 (December 2012): 462–67. http://dx.doi.org/10.4028/www.scientific.net/amm.239-240.462.

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This paper presents a comparison of different measurement techniques for condition monitoring of electric motors. Results are presented for vibration, acoustic and thermal analysis. Vibration signals were measured by piezoelectric accelerometers, acoustic by microphones and temperature data was collected by an infrared camera. Two induction motor cases were examined – healthy motor case and combination of static eccentricity with soft foot case. Vibration monitoring is a well known technique used in condition monitoring and in this work vibration measurements were used as a reference signal fo

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Holt, David W. "Monitoring mycophenolic acid." Annals of Clinical Biochemistry: International Journal of Laboratory Medicine 39, no. 3 (2002): 173–83. http://dx.doi.org/10.1258/0004563021902035.

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The immunosuppressive agent mycophenolate mofetil is a prodrug for the active compound mycophenolic acid. Following organ transplantation, it is used mostly in combination with other immunosuppressive drugs, but it has also been used as primary therapy. Although in the pivotal clinical studies the drug was given in fixed doses, there has been substantial interest in the measurement of mycophenolic acid in plasma as a guide to optimizing therapy. Data have emerged which indicate that the metabolism of the compound is more complex than was originally thought and that variability in exposure to t

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Gil, Wiesław, and Wiktor Masłowski. "Measurement uncertainty in on-line bushing monitoring." Journal of Energy - Energija 73, no. 1 (2024): 14–17. http://dx.doi.org/10.37798/2024731509.

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The high voltage bushing on-line monitoring has been performed for many years to prevent unexpected rapid power network failures. Network unbalance correction, based on separate voltage phase measurement or phasor technique, effectively improves the measurements of bushing dielectric dissipation factor tgδ and capacitance factor C1. The newly implemented monitoring units reveal that the uncertainty of station voltage measuring transformers manifest the greatest influence on the overall uncertainty budget, regardless of the measurement method.

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Schweizer, Thilo, Volker Hartwich, Thomas Riva, et al. "Limitations of transcutaneous carbon dioxide monitoring in apneic oxygenation." PLOS ONE 18, no. 6 (2023): e0286038. http://dx.doi.org/10.1371/journal.pone.0286038.

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Background High-flow nasal oxygenation is increasingly used during sedation procedures and general anesthesia in apneic patients. Transcutaneous CO2 (ptcCO2)-monitoring is used to monitor hypercapnia. This study investigated ptcCO2-monitoring during apneic oxygenation. Methods We included 100 patients scheduled for elective surgery under general anesthesia in this secondary analysis of a randomized controlled trial. Before surgery, we collected ptcCO2 measured by TCM4 and TCM5 monitors and arterial blood gas (ABG) measurements every two minutes during 15 minutes of apnea. Bland-Altman plots an

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Iparraguirre-Villanueva, Orlando, Enrique Surcco-Jacinto, and Melanie Balvin-Chávez. "Remote Heart Rate Monitoring Device Using the Internet of Things." International Journal of Online and Biomedical Engineering (iJOE) 20, no. 05 (2024): 162–73. http://dx.doi.org/10.3991/ijoe.v20i05.46857.

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Cardiovascular diseases are the leading cause of death worldwide. Therefore, this study aims to develop a mobile application utilizing the Internet of Things (IoT) to monitor patients’ heart rate. The study employed a quantitative approach and a pre-experimental design. The experiment was conducted according to the research plan and involved 20 patients. The Scrum methodology was used for the development of the mobile application. The results reveal a significant improvement in patient and family satisfaction after using the IoT-enabled mobile application. In addition, the average measurement

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Krause, Stuart, Tanja G. M. Sanders, Jan-Peter Mund, and Klaus Greve. "UAV-Based Photogrammetric Tree Height Measurement for Intensive Forest Monitoring." Remote Sensing 11, no. 7 (2019): 758. http://dx.doi.org/10.3390/rs11070758.

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The measurement of tree height has long been an important tree attribute for the purpose of calculating tree growth, volume, and biomass, which in turn deliver important ecological and economical information to decision makers. Tree height has traditionally been measured by indirect field-based techniques, however these methods are rarely contested. With recent advances in Unmanned Aerial Vehicle (UAV) remote sensing technologies, the possibility to acquire accurate tree heights semi-automatically has become a reality. In this study, photogrammetric and field-based tree height measurements of

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RECIOUI, Abdelmadjid, Mohamed TAZIBT, and Hakim BENHENNI. "Fault Detection in Wide Area Monitoring Systems via PMU Optimal Placement." Algerian Journal of Signals and Systems 2, no. 3 (2017): 149–61. http://dx.doi.org/10.51485/ajss.v2i3.41.

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The Phasor measurement units (PMUs) have become more and more attractive in power engineering as they can provide synchronized measurements of real-time voltage and currents phasors. The objective of this work is twofold: first, the optimal placement of PMUs is done in the standardized IEEE systems. Next, fault location is determined based on the measurements collected from these PMUs. The simulations are carried out using MATLAB SIMULINK. The results show that it is possible to exploit the PMU measurement data to locate and hence cure the faults in the power system.

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Soares, Paulo Henrique, Johny Paulo Monteiro, Fernando José Gaioto, Luciano Ogiboski, and Cid Marcos Gonçalves Andrade. "Use of Association Algorithms in Air Quality Monitoring." Atmosphere 14, no. 4 (2023): 648. http://dx.doi.org/10.3390/atmos14040648.

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Over the years, there has been a gradual increase in the emission of pollutants, and it is imperative to establish mechanisms to monitor air quality. In addition to carbon dioxide (CO2), particulate matter (PM) is considered one of the main types of air pollution. However, there is a wide variety of pollutants, and high investment is required to carry out detailed air quality monitoring. We present the third version of a previously proposed air quality monitoring platform based on CO2 concentration measurements. In this new version, a specific sensor for PM measurements and an artificial intel

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Radoi, Andrei, Cezar Margineanu, Constantin Ploesteanu, and Vasile Pangratie. "Static and Dynamic Structural Health Monitoring System for Bridges." Romanian Journal of Transport Infrastructure 10, no. 1 (2021): 108–23. http://dx.doi.org/10.2478/rjti-2021-0007.

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Abstract This document describes a system for static and dynamic monitoring of the structural health of bridges, but not only. The need to develop the system resulted from the difficulties encountered by the authors in installing and operating complex monitoring systems, composed of elements from different manufacturers, with different measurement technologies, power supplies, communication modes and software applications. The described system facilitates the integration of different measurements, sensors, power supplies and communication technologies, in a unitary system that allows both stat

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Groenenboom, Jeroen, and Dirkjan B. van Dam. "Monitoring hydraulic fracture growth: Laboratory experiments." GEOPHYSICS 65, no. 2 (2000): 603–11. http://dx.doi.org/10.1190/1.1444756.

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We carry out small‐scale hydraulic fracture experiments to investigate the physics of hydraulic fracturing. The laboratory experiments are combined with time‐lapse ultrasonic measurements with active sources using both compressional and shear‐wave transducers. For the time‐lapse measurements we focus on ultrasonic measurement changes during fracture growth. As a consequence we can detect the hydraulic fracture and characterize its shape and geometry during growth. Hence, this paper deals with fracture characterization using time‐lapse acoustic data. During fracture growth the acoustic waves ge

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Vašátko, Radek, and Jan L. Vítek. "Long-Term Monitoring of Concrete Building Structure." Solid State Phenomena 272 (February 2018): 160–65. http://dx.doi.org/10.4028/www.scientific.net/ssp.272.160.

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Long-term deformations of the concrete are important for determination of behavior of concrete structures. For prediction of the long-term deformations rheological models are used. The models are usually derived from measurements on laboratory specimens. There are only few measurements performed on real structures. The objective of the realized experimental program is to compare predicted values of strains and strains measured on a real structure. Vibrating wire strain gauges have been installed in two columns in underground floors of eight-storey office building. Target of this paper is evalu

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