A Quantification Method for Fitting Directed Arcs to Hexagonal Grid Edges

2018 ◽  
Vol 30 (4) ◽  
pp. 557
Author(s):  
Han Zhang ◽  
Jing Li ◽  
Pin Lyu ◽  
Yongzhi Xu ◽  
Gelin Liu
Keyword(s):  
Hexagonal Grid ◽  
Quantification Method

One-shot Multi-angle Measurement Device for Evaluating the Sparkle Impression

2020 ◽  
Vol 2020 (5) ◽  
pp. 60401-1-60401-8
Author(s):  
Shuhei Watanabe
Keyword(s):  
Spatial Frequency ◽  
Product Design ◽  
Angle Measurement ◽  
Observation Angle ◽  
Light Sources ◽  
Quantification Method ◽  
Material Appearance ◽  
Subjective Score ◽  
Measurement Devices ◽  
Rotation Stage

The quantification of material appearance is important in product design. In particular, the sparkle impression of metallic paint used mainly for automobiles varies with the observation angle. Although several evaluation methods and multi-angle measurement devices have been proposed for the impression, it is necessary to add more light sources or cameras to the devices to increase the number of evaluation angles. The present study constructed a device that evaluates the multi-angle sparkle impression in one shot and developed a method for quantifying the impression. The device comprises a line spectral camera, light source, and motorized rotation stage. The quantification method is based on spatial frequency characteristics. It was confirmed that the evaluation value obtained from the image recorded by the constructed device correlates closely with a subjective score. Furthermore, the evaluation value is significantly correlated with that obtained using a commercially available evaluation device.

scholarly journals Automatic 1D 1H NMR Metabolite Quantification for Bioreactor Monitoring

Metabolites ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 157
Author(s):  
Roy Chih Chung Wang ◽  
David A. Campbell ◽  
James R. Green ◽  
Miroslava Čuperlović-Culf
Keyword(s):  
High Throughput ◽  
Nmr Metabolomics ◽  
Gene Therapies ◽  
Quantification Method ◽  
Minimal Sample ◽  
Enhanced Production ◽  
Bioreactor Monitoring ◽  
Online Measurements ◽  
Metabolite Quantification ◽  
Set Up

High-throughput metabolomics can be used to optimize cell growth for enhanced production or for monitoring cell health in bioreactors. It has applications in cell and gene therapies, vaccines, biologics, and bioprocessing. NMR metabolomics is a method that allows for fast and reliable experimentation, requires only minimal sample preparation, and can be set up to take online measurements of cell media for bioreactor monitoring. This type of application requires a fully automated metabolite quantification method that can be linked with high-throughput measurements. In this review, we discuss the quantifier requirements in this type of application, the existing methods for NMR metabolomics quantification, and the performance of three existing quantifiers in the context of NMR metabolomics for bioreactor monitoring.

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