Calibration measurements

The paper presents the characteristics of the ISO-4037 narrow spectrum X-ray reference fields in 02 different manners: simulation using the SpekPy and measurement using a calibrated ionization chamber. The physical (air Kerma rate) and radiation (X-ray fluence-spectrumaveraged energy, the first and the second half value layers, as well as the beam homogeneity coefficient) quantities were simulated using the SpekPy web-based simulation toolkit.

5p viambani 18-06-2024 3 1   Download

This study has established and calibrated a three-dimensional system model with a combination of hydraulics-waves and suspended sediment transport with measured data in the study area. Based on the calculated scenarios for the flood and the dry seasons, the results show the occurrence of MTZs in the riparian zone of the Mekong river with typical suspended sediment concentrations (SSC) ranging from 0.04–1.0 kg/m3 dry season and 0.2–1.1 kg/m3 flood season.

18p dianmotminh02 03-05-2024 3 1   Download

This study utilized the GIS-based Soil and Water Assessment Tool (SWAT) model to simulate the flow of Vu Gia - Thu Bon river basin at two hydrological stations - Nong Son and Thanh My, during the calibration period (2004 - 2010) and the verification period (2011 - 2015). The evaluation results of both periods, as measured by the NSE and R2 indexes, were found to be above 0.75.

12p dianmotminh02 03-05-2024 2 2   Download

Ebook "Metrology in chemistry" presents the essentials every chemist needs to know about how to obtain reliable measurement results. Starting with the basics of metrology and the metrological infrastructure, all relevant topics – such as traceability, calibration, chemical reference materials, validation and uncertainty – are covered. In addition, key aspects of laboratory management, including quality management, inter-laboratory comparisons, proficiency testing, and accreditation, are addressed.

201p tracanhphuonghoa1007 22-04-2024 4 3   Download

Ebook "Radiometry in modern scientific experiments" is provided with information about methods of calibration of light sources and photodetectors as well as responsiveness of spectral instruments ranging from near infrared to vacuum UV spectral, 1200 – 100 nm, and radiation intensities of up to several quanta per second in absolute and arbitrary units. The author describes for the first time original methods of measurements they created and draws upon over 40 years of experience in working with light sources and detectors to provide accurate and precise measurements.

211p manmanthanhla0201 26-02-2024 1 1   Download

Ebook "Standardization and quality assurance in fluorescence measurements I: Techniques" is still in its infancy as compared to other prominent analytical and bioanalytical methods. Appropriate quality assurance standards are however a prerequisite for applications in highly regulated fields such as medical diagnostics, drug development, or food analysis. For the first time, a team of recognized international experts has documented the present status of quality assurance in fluorescence measurements, and outlines concepts for establishing standards in this field.

499p manmanthanhla0201 27-02-2024 4 1   Download

This practice covers the procedure for calibration of instruments to be used for estimating the ferrite content of the microstructure of cast stainless steels by magnetic response or measurement of permeability. This procedure covers both primary and secondary instruments.

5p hth_hn_vn 10-12-2023 6 4   Download

Ebook "Measurement errors and uncertainties: Theory and practice (Third edition)" is to give methods for estimating errors and uncertainties of real measurements: measurements that are performed in industry, commerce, and experimental research. This book is needed because the existing theory of measurement errors was historically developed as an abstract mathematical discipline.

313p tuongnhuoclan 28-11-2023 6 4   Download

Part 1 book "PCR Technology - Current innovations" includes content: Pre-PCR processing strategies, use of a liposomal internal control vehicle for whole process quality assurance of nucleic acid amplification, using scorpion primers for genotyping, thermocycler calibration and analytical assay validation, dropletization of bioreactions - how single cell quantitative analyses may improve gene measurement and cancer diagnosis,.... and other contents.

192p oursky06 17-10-2023 3 1   Download

Covered topics include (1) an introduction to the importance of calibration in the clinical setting, (2) an illustration of the distinct roles that discrimination and calibration play in the assessment of clinical predictive models, (3) a tutorial and demonstration of selected calibration measurements, (4) a tutorial and demonstration of selected calibration models, and (5) a brief discussion of limitations of these methods and practical suggestions on how to use them in practice.

13p vighostrider 25-05-2023 5 2   Download

In this study, an experimental setup on new short irradiation system has been performed for determination of the k0 factor of short-lived nuclides. The system for short irradiation and rapid measurement were calibrated carefully and described in detail.

4p vicedric 08-02-2023 6 3   Download

To keep the accredited category for the gamma spectrometry test in our laboratory, the efficiency curves of a HPGe detector for soil sample in Marinelli geometry were determined by “efficiency transfer” principle via the ANGLE3 commercial software and Monte Carlo simulations via MCNP5 and GEANT4.

6p vicedric 08-02-2023 8 3   Download

In this study, GEANT4 and MCNP software are used to simulate and optimization cylindrical container geometries of environmental samples for measurement on low background gamma spectrometry system.

9p visnape 30-01-2023 7 4   Download

Thermocouples are one of the most widespread used sensors for temperature measurements in several applications, thanks to their robustness, low cost and ease of installation. However, when used in high temperature environments or in the presence of flames or elevated hot sources, the measurement can be affected, for example, by radiative exchanges to and from the ambient.

9p vironald 15-12-2022 13 3   Download

This dispersion highlights the danger of relying on individual calibrations, and is clearly undesirable. Here we continue our investigation into providing reliable calibration materials for trapped electron dating. A comparison of the apparent quartz β source dose rates shows that there is no significant dependence on the geological source of the quartz.

6p vironald 15-12-2022 11 3   Download

Solid State Nuclear Track Detectors (SSNTD) have been used as passive dosimeters for many decades. Fast neutron detection is performed by detecting recoil protons generated in a hydrogenous material (neutron converter). The dose is estimated by multiplying the recoil protons track-spots density present on the detector surface by a calibration coefficient obtained from reference irradiations.

13p vironald 15-12-2022 13 3   Download

Measurements of the natural radiation background with different devices and at various conditions are important from a methodological point of view in order to compare and eventually inter-calibrate different experimental sets, also to provide a reliable basis for improving the existing models for assessment of the environmental radiation in the Earth’s atmosphere.

8p vironald 15-12-2022 7 3   Download

The applicability of optically stimulated luminescence (OSL) dating on quartz from South Island, New Zealand is hampered by the poor behaviour of the targeted signals. However, most OSL dating studies have been focused on using coarse quartz fractions.

9p vironald 15-12-2022 5 3   Download

Previous calculations of the γ dose given to Risø Calibration Quartz (RCQ) were performed using mass absorption and mass attenuation coefficients. In this paper, we update the γ dose given to RCQ using Geant4 simulations and provide a comparison with three other γ sources in Denmark.

5p vironald 15-12-2022 13 3   Download

This paper presents the results of nearshore wave propagation and transformation and the distribution of wave set-up during storms in the coastal area of Cua Dai, Hoi An, using the SWAN model and the XBEACH model. The models have been calibrated and validated using measured wave and water level data observed in the study area in October 2016.

11p vielonmusk 21-01-2022 10 0   Download