Methods for achieving high measurement sensitivity in holographic interferometry by rewriting holograms using incoherent light

1999 ◽  
Vol 44 (12) ◽  
pp. 1462-1466
Author(s):  
A. M. Lyalikov
Keyword(s):  
Holographic Interferometry ◽  
Measurement Sensitivity ◽  
Incoherent Light ◽  
High Measurement

scholarly journals All-Solid-State Potentiometric Ion-Sensors Based on Tailored Imprinted Polymers for Pholcodine Determination

Polymers ◽  
2021 ◽  
Vol 13 (8) ◽  
pp. 1192
Author(s):  
Hisham S. M. Abd-Rabboh ◽  
Abd El-Galil E. Amr ◽  
Abdulrahman A. Almehizia ◽  
Ayman H. Kamel
Keyword(s):  
Solid State ◽  
Low Cost ◽  
Cost Effective ◽  
Pharmaceutical Formulations ◽  
Measurement Sensitivity ◽  
Serum Samples ◽  
Multiwalled Carbon ◽  
Imprinted Polymers ◽  
High Measurement ◽  
Liquid Chromatographic

In recent times, the application of the use of ion-selective electrodes has expanded in the field of pharmaceutical analyses due to their distinction from other sensors in their high selectivity and low cost of measurement, in addition to their high measurement sensitivity. Cost-effective, reliable, and robust all-solid-state potentiometric selective electrodes were designed, characterized, and successfully used for pholcodine determination. The design of the sensor device was based on the use of a screen-printed electrode modified with multiwalled carbon nanotubes (MWCNTs) as a solid-contact transducer. Tailored pholcodine (PHO) molecularly imprinted polymers (MIPs) were prepared, characterized, and used as sensory receptors in the presented potentiometric sensing devices. The sensors exhibited a sensitivity of 31.6 ± 0.5 mV/decade (n = 5, R2 = 0.9980) over the linear range of 5.5 × 10−6 M with a detection limit of 2.5 × 10−7 M. Real serum samples in addition to pharmaceutical formulations containing PHO were analyzed, and the results were compared with those obtained by the conventional standard liquid chromatographic approach. The presented analytical device showed an outstanding efficiency for fast, direct, and low-cost assessment of pholcodine levels in different matrices.

Usage of Digital Image Correlation in Analysis of Cracking Processes

2012 ◽  
Vol 17 (3) ◽  
pp. 21-28 ◽  
Author(s):  
Beata Marciniak ◽  
Tomasz Marciniak ◽  
Zbigniew Lutowski ◽  
Sławomir Bujnowski
Keyword(s):  
Digital Image Correlation ◽  
Digital Image ◽  
Graphics Processing Unit ◽  
Strain Analysis ◽  
Fatigue Cracking ◽  
Image Correlation ◽  
Processing Unit ◽  
Measurement Sensitivity ◽  
Riveted Joints ◽  
High Measurement

Abstract In this paper, the analysis of the possibilities of using Digital Image Correlation (DIC) based on Graphics Processing Unit (GPU) for strain analysis in fatigue cracking processes is presented. The basic assumption for the discussed displacement and strain measurement method under time variable loads was obtaining high measurement sensitivity by simultaneously minimizing the measurement time consumption. For this purpose special computing procedures based on multiprocessor graphic cards were developed, which significantly reduced the total time of displacement and strain analysis. The developed digital procedure for correlation of images has been used for an example of displacement analysis in the method of fatigue crack propagation testing in airplane riveted joints. In this paper are presented the results of the researches of the team run by professor Antoni Zabłudowski

scholarly journals An Airborne 2-μm Double-Pulsed Direct-Detection Lidar Instrument for Atmospheric CO2 Column Measurements

2017 ◽  
Vol 34 (2) ◽  
pp. 385-400 ◽  
Author(s):  
Jirong Yu ◽  
Mulugeta Petros ◽  
Upendra N. Singh ◽  
Tamer F. Refaat ◽  
Karl Reithmaier ◽  
...  
Keyword(s):  
Column Density ◽  
Direct Detection ◽  
Ground Surface ◽  
Lidar Measurement ◽  
Measurement Sensitivity ◽  
Airborne Measurements ◽  
Alternative Approach ◽  
Lidar Measurements ◽  
High Measurement ◽  
Dry Mixing

AbstractThis study reports airborne measurements of atmospheric CO2 column density using a 2-μm double-pulsed integrated path differential absorption (IPDA) lidar. This new 2-μm IPDA lidar offers an alternative approach to measure CO2 column density with unique features. The online frequencies of this lidar can be tuned to 1–6 GHz from the CO2 R30 absorption line peak. It provides high measurement sensitivity to the lower-tropospheric CO2 near the ground surface. This instrument was flown in the spring of 2014 in a NASA B200 aircraft. The results of these test flights clearly demonstrate the measurement capabilities of this lidar instrument. The CO2 column dry mixing ratio is compared to an in situ CO2 measurement by a collocated NOAA flight. The IPDA lidar measurement is determined to be in good agreement with a 0.36% difference, which corresponds to 1.48 ppm. It is the average difference between the IPDA lidar measurements and the NOAA air samples in the flight altitudes from 3 to 6.1 km.

Application of Digital Image Correlation in Fatigue Crack Analysis

2012 ◽  
Vol 726 ◽  
pp. 218-221 ◽  
Author(s):  
Tomasz Marciniak ◽  
Zbigniew Lutowski ◽  
Sławomir Bujnowski ◽  
Dariusz Boroński ◽  
Tomasz Giesko
Keyword(s):  
Digital Image Correlation ◽  
Digital Image ◽  
Basic Assumption ◽  
Image Correlation ◽  
Measurement Sensitivity ◽  
Displacement Analysis ◽  
Riveted Joints ◽  
High Measurement ◽  
Cracking Zone ◽  
Paper Method

In the paper method of displacement analysis in the cracking zone based on digital image correlation and advanced multi-processor graphic cards procedures was presented. The basic assumption for the discussed displacement and strain measurement method under time variable loads was obtaining high measurement sensitivity by simultaneously minimizing the measurement time consumption. The developed digital procedures for correlation of images has been used for an example of displacement analysis in the crack propagation testing in airplane riveted joints.

A NOVEL MICROWAVE SENSOR WITH HIGH-Q SYMMETRICAL SPLIT RING RESONATOR FOR MATERIAL PROPERTIES MEASUREMENT

2016 ◽  
Vol 78 (10-3) ◽  
Author(s):  
Rammah A. Alahnomi ◽  
Z. Zakaria ◽  
E. Ruslan ◽  
Amyrul Azuan Mohd Bahar ◽  
Noor Azwan Shairi
Keyword(s):  
Ring Resonator ◽  
Estimation Error ◽  
Split Ring Resonator ◽  
Experimental Methodology ◽  
Measurement Sensitivity ◽  
Split Ring ◽  
Coaxial Cavity ◽  
Microwave Frequencies ◽  
High Measurement ◽  
Average Estimation Error

A new sensor based on symmetrical split ring resonator (SSRR) functioning at microwave frequencies has been proposed in order to detect and characterize the properties of the materials. This sensor is based on perturbation theory, in which the dielectric properties of the material affect the quality factor and resonance frequency of the microwave resonator. Conventionally, coaxial cavity, waveguide, dielectric resonator techniques have been used for characterizing materials. However, these techniques are often large, and expensive to build, which restricts their use in many important applications. Thus, the proposed bio-sensing technique presents advantages such as high measurement sensitivity (around 400 Q-factor) with the capability of suppressing undesired harmonic spurious and permits potentially material characterization and determination.  Hence, using a specific experimental methodology, tests performed have demonstrated the biosensor ability to characterize at least four references materials with known permittivity (Air, Roger Duriod RT 5880, Roger Duriod RT 4530, FR4) and one material with unknown permittivity (Beef). Accordingly, the numerically established relations are experimentally verified for these reference materials and the results indicated that the average estimation error of measuring the permittivity was 2.56 % at resonant of around 2.2 GHz.  The proposed design is useful for various applications such as food industry, medicine, pharmacy, bio-sensing and quality control

Sign in / Sign up

Export Citation Format

Share Document