Applications of real-time holography to determine surface displacement

1986 ◽  
Author(s):  
D. E. Parker ◽  
P. D. Plotkowski
Keyword(s):  
Real Time ◽  
Surface Displacement

Real‐time ultrasound visualization of the tongue surface: Displacement and curvature

1983 ◽  
Vol 73 (S1) ◽  
pp. S47-S47
Author(s):  
Maureen Stone ◽  
Barbara C. Sonies ◽  
Kathleen A. Morrish
Keyword(s):  
Real Time ◽  
Surface Displacement ◽  
Tongue Surface

scholarly journals Time forecast of a break-off event from a hanging glacier

2016 ◽  
Vol 10 (3) ◽  
pp. 1191-1200 ◽  
Author(s):  
Jérome Faillettaz ◽  
Martin Funk ◽  
Marco Vagliasindi
Keyword(s):  
Real Time ◽  
Power Law ◽  
Surface Displacement ◽  
Early Warning Systems ◽  
Warning Systems ◽  
Safety Measures ◽  
Periodic Oscillations ◽  
Ice Volume ◽  
Surface Displacements ◽  
Displacement Measurements

Abstract. A cold hanging glacier located on the south face of the Grandes Jorasses (Mont Blanc, Italy) broke off on the 23 and 29 September 2014 with a total estimated ice volume of 105 000 m3. Thanks to accurate surface displacement measurements taken up to the final break-off, this event was successfully predicted 10 days in advance, enabling local authorities to take the necessary safety measures. The break-off event also confirmed that surface displacements experienced a power law acceleration along with superimposed log-periodic oscillations prior to the final rupture. This paper describes the methods used to achieve a satisfactory time forecast in real time and demonstrates, using a retrospective analysis, their potential for the development of early-warning systems in real time.

Real-Time Detection of Tunnel Face Surface Displacement by 3D Scanner

2017 ◽  
Vol 2017 (0) ◽  
pp. 2A2-N12
Author(s):  
Takahiro SANPEI ◽  
Tomohiro MIZOGUCHI ◽  
Makoto YAMAMOTO ◽  
Tadashi YAMAMOTO ◽  
Hidenobu KAGE ◽  
...  
Keyword(s):  
Real Time ◽  
Surface Displacement ◽  
3D Scanner ◽  
Tunnel Face ◽  
Face Surface ◽  
Real Time Detection

scholarly journals Real Time Measurement of a Surface Displacement with Two Laser Beams

2004 ◽  
Vol 32 (10) ◽  
pp. 648-652
Author(s):  
Tomotaka KOZUKI ◽  
Tomomi HONDA ◽  
Tetsuma SAKURAI ◽  
Masahiro UEDA
Keyword(s):  
Real Time ◽  
Surface Displacement ◽  
Time Measurement ◽  
Laser Beams ◽  
Real Time Measurement

scholarly journals Time forecast of a break-off event from a hanging glacier

2015 ◽  
Vol 9 (5) ◽  
pp. 4925-4948
Author(s):  
J. Faillettaz ◽  
M. Funk ◽  
M. Vagliasindi
Keyword(s):  
Real Time ◽  
Power Law ◽  
Surface Displacement ◽  
Early Warning Systems ◽  
Warning Systems ◽  
Safety Measures ◽  
Periodic Oscillations ◽  
Ice Volume ◽  
Surface Displacements ◽  
Displacement Measurements

Abstract. A cold hanging glacier located on the south face of the Grandes Jorasses (Mont Blanc, Italy) broke off on the 23 and 29 September 2014 with a total estimated ice volume of 105 000 m3. Thanks to very accurate surface displacement measurements taken right up to the final break-off, this event could be successfully predicted 10 days in advance, enabling local authorities to take the necessary safety measures. The break-off event also confirmed that surface displacements experience a power law acceleration along with superimposed log-periodic oscillations prior to the final rupture. This paper describes the methods used to achieve a satisfactory time forecast in real time and demonstrates, using a retrospective analysis, their potential for the development of early-warning systems in real time.

scholarly journals A Fast Deploying Monitoring and Real-Time Early Warning System for the Baige Landslide in Tibet, China

Sensors ◽  
2020 ◽  
Vol 20 (22) ◽  
pp. 6619
Author(s):  
Yongbo Wu ◽  
Ruiqing Niu ◽  
Yi Wang ◽  
Tao Chen
Keyword(s):  
Real Time ◽  
Early Warning ◽  
Early Warning System ◽  
Prediction Method ◽  
Surface Displacement ◽  
Warning System ◽  
Early Warning Systems ◽  
Support Vector ◽  
Time Prediction ◽  
Svm Model

Landslide early warning systems (EWSs) have been widely used to reduce disaster losses. The effectiveness of a landslide EWS depends highly on the prediction methods, and it is difficult to correctly predict landslides in a timely manner. In this paper, we propose a real-time prediction method to provide real-time early warning of landslides by combining the Kalman filtering (KF), fast Fourier transform (FFT), and support vector machine (SVM) methods. We also designed a fast deploying monitoring system (FDMS) to monitor the displacement of landslides for real-time prediction. The FDMS can be quickly deployed compared to the existing system. This system also has high robustness due to the usage of the ad-hoc technique. The principle of this method is to extract the precursory features of the landslide from the surface displacement data obtained by the FDMS and, then, to train the KF-FFT-SVM model to make a prediction based on these precursory features. We applied this fast monitoring and real-time early warning system to the Baige landslide, Tibet, China. The results showed that the KF-FFT-SVM model was able to provide real-time early warning for the Baige landslide with high accuracy.

Some Recent Results in Quiescent Prominence Spectrometry

1979 ◽  
Vol 44 ◽  
pp. 41-47
Author(s):  
Donald A. Landman
Keyword(s):  
Real Time ◽  
Computer System ◽  
Spectral Response ◽  
Absolute Intensity ◽  
Solar Observatory ◽  
Target Size ◽  
Small Target ◽  
Signal Averaging ◽  
Quiescent Prominence

This paper describes some recent results of our quiescent prominence spectrometry program at the Mees Solar Observatory on Haleakala. The observations were made with the 25 cm coronagraph/coudé spectrograph system using a silicon vidicon detector. This detector consists of 500 contiguous channels covering approximately 6 or 80 Å, depending on the grating used. The instrument is interfaced to the Observatory’s PDP 11/45 computer system, and has the important advantages of wide spectral response, linearity and signal-averaging with real-time display. Its principal drawback is the relatively small target size. For the present work, the aperture was about 3″ × 5″. Absolute intensity calibrations were made by measuring quiet regions near sun center.

Video real-time imaging of artificial membranes during freeze-drying by cryo-electron microscopy

1988 ◽  
Vol 46 ◽  
pp. 16-17
Author(s):  
Alan S. Rudolph ◽  
Ronald R. Price
Keyword(s):  
Real Time ◽  
Self Assembly ◽  
Freeze Drying ◽  
Video Capture ◽  
Drying Process ◽  
Artificial Membranes ◽  
The Past ◽  
Cryo Electron Microscopy ◽  
Spherical Structures ◽  
Capture Techniques

We have employed cryoelectron microscopy to visualize events that occur during the freeze-drying of artificial membranes by employing real time video capture techniques. Artificial membranes or liposomes which are spherical structures within internal aqueous space are stabilized by water which provides the driving force for spontaneous self-assembly of these structures. Previous assays of damage to these structures which are induced by freeze drying reveal that the two principal deleterious events that occur are 1) fusion of liposomes and 2) leakage of contents trapped within the liposome [1]. In the past the only way to access these events was to examine the liposomes following the dehydration event. This technique allows the event to be monitored in real time as the liposomes destabilize and as water is sublimed at cryo temperatures in the vacuum of the microscope. The method by which liposomes are compromised by freeze-drying are largely unknown. This technique has shown that cryo-protectants such as glycerol and carbohydrates are able to maintain liposomal structure throughout the drying process.

An Interactive Minicomputer Program for the Indexing and Simulation of Electron Diffraction Patterns

1976 ◽  
Vol 34 ◽  
pp. 542-543
Author(s):  
R.P. Goehner ◽  
W.T. Hatfield ◽  
Prakash Rao
Keyword(s):  
Electron Diffraction ◽  
Real Time ◽  
Pattern Analysis ◽  
Flow Diagram ◽  
Hard Copy ◽  
Time Analysis ◽  
Real Time Analysis ◽  
Transmission Electron ◽  
One Step ◽  
Diffraction Patterns

Computer programs are now available in various laboratories for the indexing and simulation of transmission electron diffraction patterns. Although these programs address themselves to the solution of various aspects of the indexing and simulation process, the ultimate goal is to perform real time diffraction pattern analysis directly off of the imaging screen of the transmission electron microscope. The program to be described in this paper represents one step prior to real time analysis. It involves the combination of two programs, described in an earlier paper(l), into a single program for use on an interactive basis with a minicomputer. In our case, the minicomputer is an INTERDATA 70 equipped with a Tektronix 4010-1 graphical display terminal and hard copy unit.A simplified flow diagram of the combined program, written in Fortran IV, is shown in Figure 1. It consists of two programs INDEX and TEDP which index and simulate electron diffraction patterns respectively. The user has the option of choosing either the indexing or simulating aspects of the combined program.

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