Results 21 to 30 of about 507,445 (265)
Sensors, 2023 Air-coupled ultrasound sensors have advantages over contact ultrasound sensors when a sample should not become contaminated or influenced by the couplant or the measurement has to be a fast and automated inline process.
Klaas Bente +4 more
doaj +1 more source
The measurement of Central Corneal Thickness
romanian journal of ophthalmology, 2023 We aimed to compare five different devices that measure Central Corneal Thickness. The Central Corneal Thickness (CCT) is an important parameter in ophthalmology. It is involved in the management of various eye conditions such as: glaucoma, keratoconus, contact lens wearing, corneal dystrophies, refractive surgery and keratoplasty.
Camburu, Georgiana +3 more
openaire +2 more sources
Research on modelling and calculation method of river ice electromagnetic scattering
The Journal of Engineering, 2019 In order to verify the feasibility of using microwave to study Yellow River ice, the reflected power of pure ice and mixed ice is measured by electromagnetic waves of different polarisations and frequencies in the microwave chamber.
Pingping Huang +4 more
doaj +1 more source
Photonics, 2021 Chromatic confocal microscopy is a widely used method to measure the thickness of transparent specimens. In conventional configurations, both the illumination and imaging axes are perpendicular to the test specimen.
Qing Yu +7 more
doaj +1 more source
Multilayer Thickness Measurements below the Rayleigh Limit Using FMCW Millimeter and Terahertz Waves
Sensors, 2019 We present thickness measurements with millimeter and terahertz waves using frequency-modulated continuous-wave (FMCW) sensors. In contrast to terahertz time-domain spectroscopy (TDS), our FMCW systems provide a higher penetration depth and measurement ...
Nina S. Schreiner +4 more
doaj +1 more source
Fabrication of Multilayer Cu/Ni Systems with Nanometric Layers by Electrolysis Method [PDF]
Archives of Metallurgy and Materials, 2018 The paper presents research results of multilayer systems composed of alternate Cu/Ni layers. The layers thickness obtained by the galvanic treatment was determined by using the transmission electron microscopy and X-ray diffraction method in the grazing
M. Spilka +4 more
doaj +1 more source
Sensors, 2020 An ultrasonic sensors system is commonly used to measure the wall thickness of buried pipelines in the transportation of oil and gas. The key of the system is to precisely measure time-of-flight difference (TOFD) produced by the reflection of ultrasonic ...
Zhipeng Li +6 more
doaj +1 more source
Pediatric Blood &Cancer, EarlyView.ABSTRACT Introduction Anthracycline‐related cardiac remodeling precedes heart failure in childhood cancer survivors. The objectives of this study were to determine the relationships between patient‐specific factors, moderate‐to‐vigorous physical activity (MVPA), and cardiac remodeling.
Hari K. Narayan +15 more
wiley +1 more source
Advances in Nondestructive Technologies for External Eggshell Quality Evaluation
SensorsThe structural integrity of poultry eggs is essential for food safety, economic value, and hatchability. External eggshell quality—measured by thickness, strength, cracks, color, and cleanliness—is a key criterion for grading and sorting.
Pengpeng Yu +5 more
doaj +1 more source
Pediatric Blood &Cancer, EarlyView.ABSTRACT Background Pediatric cancer remains a leading cause of morbidity and mortality worldwide, particularly in low‐and middle‐income countries. Cancer treatment may impair nutritional status, alter body composition, and exacerbate cancer‐related fatigue (CRF).
Luís Carlos Lopes‐Junior +11 more
wiley +1 more source