scholarly journals Recent developments in high speed imaging and applications in speckle light

2018 ◽  
Author(s):  
Pierre R. Slangen ◽  
Zacaria Essaidi ◽  
Clement Chanut ◽  
Pierre Lauret ◽  
Frederic Heymes ◽  
...  
Keyword(s):  
High Speed ◽  
High Speed Imaging ◽  
Recent Developments

Optical imaging techniques for hypersonic impulse facilities

2007 ◽  
Vol 111 (1115) ◽  
pp. 1-16 ◽  
Author(s):  
T. J. McIntyre ◽  
H. Kleine ◽  
A. F. P. Houwing
Keyword(s):  
Optical Imaging ◽  
High Speed ◽  
Imaging Techniques ◽  
Flow Visualisation ◽  
Complex Flows ◽  
High Speed Imaging ◽  
Time Resolved ◽  
Flow Parameters ◽  
Planar Laser ◽  
Recent Developments

Abstract The application of optical imaging techniques to hypersonic facilities is discussed and examples of experimental measurements are provided. Traditional Schlieren and shadowgraph techniques still remain as inexpensive and easy to use flow visualisation techniques. With the advent of faster cameras, these methods are becoming increasingly important for time-resolved high-speed imaging. Interferometry’s quantitative nature is regularly used to obtain density information about hypersonic flows. Recent developments have seen an extension of the types of flows that can be imaged and the measurement of other flow parameters such as ionisation level. Planar laser induced fluorescence has been used to visualise complex flows and to measure such quantities as temperature and velocity. Future directions for optical imaging are discussed.

Human whole body imaging and detection of breast tumours by n.m.r

1980 ◽  
Vol 289 (1037) ◽  
pp. 503-510 ◽  
Keyword(s):  
High Speed ◽  
Lattice Relaxation ◽  
Lattice Relaxation Time ◽  
Spin Lattice Relaxation ◽  
Whole Body ◽  
Whole Body Imaging ◽  
High Speed Imaging ◽  
Spin Lattice ◽  
Recent Developments ◽  
Echo Planar

A brief review of recent developments in line scan imaging of large objects is given, together with some representative images showing anatomical detail and a discussion of some spin-lattice relaxation time mapping results. Current progress in high speed imaging by means of the echo planar technique is reported and some preliminary results obtained at both 15.0 and 4.0 MHz are discussed.

Closing remarks

1990 ◽  
Vol 333 (1632) ◽  
pp. 571-572
Keyword(s):  
High Speed ◽  
Double Resonance ◽  
Nmr Imaging ◽  
Future Prospects ◽  
High Speed Imaging ◽  
Microscopic Imaging ◽  
Line Narrowing ◽  
The Future ◽  
Recent Developments ◽  
Wide Potential

At this second Discussion Meeting on NMR imaging, we have seen a broad range of imaging and spectroscopic activities from imaging of solids, microscopic imaging, high-speed imaging and spectroscopic imaging. It has been 11 years since the first Discussion Meeting, and the object at this meeting was to review the recent developments and consider the future prospects. We have all been amazed by the developments in solid imaging and the quality and resolution that can now be achieved by combining line narrowing methods with gradient pulsing or with gradient modulation. The future for solid imaging with its wide potential is assured. Progress in free radical imaging using proton-electron double resonance was also briefly reviewed. Detection of natural levels of free radicals in biological tissue is some way off, but the progress with this technique is impressive.

Experimental Measurement of In-Plane Rolling Nonpneumatic Tire Vibrations Using High-Speed Imaging

2019 ◽  
Vol 47 (3) ◽  
pp. 196-210
Author(s):  
Meghashyam Panyam ◽  
Beshah Ayalew ◽  
Timothy Rhyne ◽  
Steve Cron ◽  
John Adcox
Keyword(s):  
High Speed ◽  
Image Correlation ◽  
Dynamic Mode Decomposition ◽  
Dynamic Mode ◽  
High Speed Imaging ◽  
Correlation Algorithm ◽  
Mode Decomposition ◽  
Series Of Experiments ◽  
Plane Deformations ◽  
Dominant Frequencies

ABSTRACT This article presents a novel experimental technique for measuring in-plane deformations and vibration modes of a rotating nonpneumatic tire subjected to obstacle impacts. The tire was mounted on a modified quarter-car test rig, which was built around one of the drums of a 500-horse power chassis dynamometer at Clemson University's International Center for Automotive Research. A series of experiments were conducted using a high-speed camera to capture the event of the rotating tire coming into contact with a cleat attached to the surface of the drum. The resulting video was processed using a two-dimensional digital image correlation algorithm to obtain in-plane radial and tangential deformation fields of the tire. The dynamic mode decomposition algorithm was implemented on the deformation fields to extract the dominant frequencies that were excited in the tire upon contact with the cleat. It was observed that the deformations and the modal frequencies estimated using this method were within a reasonable range of expected values. In general, the results indicate that the method used in this study can be a useful tool in measuring in-plane deformations of rolling tires without the need for additional sensors and wiring.

Application of Advanced Electrochemical Methods with Nanomaterial-based Electrodes as Powerful Tools for Trace Analysis of Drugs and Toxic Compounds

2019 ◽  
Vol 15 (2) ◽  
pp. 143-151 ◽  
Author(s):  
Parviz Norouzi ◽  
Bagher Larijani ◽  
Taher Alizadeh ◽  
Eslam Pourbasheer ◽  
Mostafa Aghazadeh ◽  
...  
Keyword(s):  
Trace Analysis ◽  
High Speed ◽  
Portable Devices ◽  
Great Opportunity ◽  
Toxic Compounds ◽  
High Speed Analysis ◽  
Recent Developments ◽  
Sensitivity And Selectivity ◽  
Trace Measurement ◽  
Health Application

Background: The new progress in electronic devices has provided a great opportunity for advancing electrochemical instruments by which we can more easily solve many problems of interest for trace analysis of compounds, with a high degree of accuracy, precision, sensitivity, and selectivity. On the other hand, in recent years, there is a significant growth in the application of nanomaterials for the construction of nanosensors due to enhanced chemical and physical properties arising from discrete modified nanomaterial-based electrodes or microelectrodes. Objective: Combination of the advanced electrochemical system and nanosensors make these devices very suitable for the high-speed analysis, as motioning and portable devices. This review will discuss the recent developments and achievements that have been reported for trace measurement of drugs and toxic compounds for environment, food and health application.

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