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Measurement - DOAJ

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Last Updated: 22 September 2022

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In Vivo Intraocular Lens Thickness Measurement and Power Estimation Using Optical Coherence Tomography

Using anterior segment optical coherence tomography and to determine the repeatability of measurements, we can determine the effectiveness of an implanted intraocular lens by determining IOL thickness by measuring IOL thickness using anterior segment optical coherence tomography and to determine the repeatability of measurements. Methods: Ninety-seven eyes were tested one month after uneventful phacoemulsification within the bag Acrysof SA60AT IOL implanted. For example, the correlation between labelled IOL power and central IOL thickness, as well as the measurement of repeatability, such as the intraclass correlation coefficient, was investigated. IOL thickness correlated strongly with labelled IOL capacity, as shown in Figures. According to the regression formula, 25 microns of central IOL thickness change per 1D power change per 1D power change. IOL power could be estimated with a precision of 0. 85 %u00b1 0. 02 D if measured over the entire range. Conclusion: Central IOL thickness measurements with the AS-OCT are highly repeatable and closely related to the branded IOL power, which can predict the IOL thickness of the AS-OCT at u00b1 0. 85 percent from the actual power.

Source link: https://doi.org/10.18502/jovr.v17i3.11572


Emission of greenhouse gases (GHGs) during composting and vermicomposting: Measurement, mitigation, and perspectives

Although composting and vermicomposting are environmentally friendly methods of disposing organic waste, one of the primary disadvantages is the release of greenhouse gases. In several cases, primarily in decrease of methane emissions, vermicomposting, earthworms are more important contributors to nitrous oxide during vermicomposting, so it's imperative to consider both processes in context with GHG emission. Effective GHGsE measurement methods aid in the estimation of emissions while also supporting in the identification of the essential elements important to GHG emissions reduction.

Source link: https://doi.org/10.1016/j.nexus.2022.100092


Modified digital image correlation aided measurement of the transverse to longitudinal deformation ratio for polymeric macro-fibres

Given the increasing use of polymeric macro-fibres reinforced concrete, a simple and effective way to determine the fibre's transverse to longitudinal deformation ratio becomes a determining factor in terms of fibre analysis and fibreu2013matrix interaction optimization. In this paper, a noncontact optical measurement technique is used to determine this ratio for concrete reinforcement by a new 2D Digital Image Correlation scheme. The findings of this study and the experimental procedure were intended to support fibre producers in the design process of optimized fibres to be used in structural concrete.

Source link: https://doi.org/10.1016/j.matdes.2022.111164


UAV-Based LiDAR Scanning for Individual Tree Detection and Height Measurement in Young Forest Permanent Trials

In growth and forest yield study, the establishment of research or permanent plots is a common task. Tree number estimation tends to underestimate the number of trees by individual tree detection programs. We did not find any differences in the relative error between Pinus pinaster and Pinus radiata. The accuracy of the ITD changes with the tree's height to be detected is lower when finding trees less than 1 meter high than those detecting larger trees. We can conclude that the use of the CHM to determine height tends to underestimate its value, while the use of the point cloud provides practically unbiased results.

Source link: https://doi.org/10.3390/rs14010170


Two-Process Random Textures: Measurement, Characterization, Modeling and Tribological Impact: A Review

Two-process random textures appear to have greater structural stability than one-process surfaces. There are several random two-process textures available. The most common example is Plateau-honed cylinder walls. During the initial phases of machined elements' life, two-process surfaces were also created. However, there is little information about two-process textures analysis, modeling, and behaviour. Surfaces that are two-processed are extremely sensitive to measurement errors. During evaluations of machined element properties, the behavior of two-process random textures should be taken into account. The plateau portion determines the asperity contact, while the valley portion controls the hydrodynamic lubrication.

Source link: https://doi.org/10.3390/ma15010268


Impact of Superconductors’ Properties on the Measurement Sensitivity of Resonant-Based Axion Detectors

Axions, hypothetical particles that were designed to solve the high CP issue, are now being considered potential cold matter constituents. The signal strength of resonant-based axion detectors, also known as haloscopes, is directly proportional to their quality factor Q. The quality factor Q of a cylindrical haloscope with copper conical bases and a superconductive lateral wall, as shown in R s, is measured and used to establish a comparison of the various materials. Both YBa 2 Cu 3 O 7 2 U 2212 u20112 and FeSe 0. 5 Te 0. 5 are shown to increase the measurement accuracy by almost an order of magnitude when compared to a complete Cu cavity, although NbTi is only effective at lower frequencies. Nb 3 Sn can be used as an intermediary in the whole spectrum of interest.

Source link: https://doi.org/10.3390/instruments6010001

* Please keep in mind that all text is summarized by machine, we do not bear any responsibility, and you should always check original source before taking any actions

* Please keep in mind that all text is summarized by machine, we do not bear any responsibility, and you should always check original source before taking any actions