scholarly journals Two-dimensional ultrasound receive array using an angle-tuned Fabry-Perot polymer film sensor for transducer field characterization and transmission ultrasound imaging

2005 ◽  
Vol 52 (6) ◽  
pp. 1002-1012 ◽  
Author(s):  
P.C. Beard
Keyword(s):  
Polymer Film ◽  
Ultrasound Imaging ◽  
Two Dimensional ◽  
Film Sensor ◽  
Fabry Perot ◽  
Receive Array

scholarly journals Using two-dimensional ultrasound imaging to examine venous pressure

2020 ◽  
Vol 44 (2) ◽  
pp. 262-267
Author(s):  
Christopher D. Johnson ◽  
Sean M. Roe ◽  
Etain A. Tansey
Keyword(s):  
Human Physiology ◽  
Ultrasound Imaging ◽  
Venous Pressure ◽  
Clinical Aspects ◽  
Two Dimensional ◽  
Imaging Procedures ◽  
Central Venous ◽  
Venous Circulation ◽  
Venous Valves ◽  
Circulatory Physiology

Ultrasound imaging is being used increasingly to aid in the teaching of human physiology and anatomy. Here we describe how its use can be integrated into the teaching of concepts surrounding venous circulation, specifically 1) venous valves and the muscle pump, 2) the effects of hydrostatic pressure on venous pressure, and 3) central venous pressure. The imaging procedures described are relatively simple but add a dimension that helps deliver the teaching points clearly and is enjoyable for students. They also aid in the link of basic physiology to clinical aspects of venous circulatory physiology.

Two-dimensional undulation pattern on free surface of polymer film cast from solution

Polymer ◽  
1993 ◽  
Vol 34 (5) ◽  
pp. 1089-1092 ◽  
Author(s):  
Shinichi Sakurai ◽  
Katsunori Tanaka ◽  
Shunji Nomura
Keyword(s):  
Free Surface ◽  
Polymer Film ◽  
Two Dimensional

scholarly journals Transmit and Receive Array Structure Design of Two-Dimensional hybrid Phased-MIMO Radar based on Nested Array

2018 ◽  
Vol 232 ◽  
pp. 02052
Author(s):  
Tianhao Cheng ◽  
Buhong Wang ◽  
Qiaoge Liu ◽  
Jiwei Tian
Keyword(s):  
Design Method ◽  
Doa Estimation ◽  
Mimo Radar ◽  
Structure Design ◽  
Estimation Accuracy ◽  
Two Dimensional ◽  
Simulation Experiments ◽  
Virtual Array ◽  
Array Structure ◽  
Receive Array

In order to reduce the loss of Degree of Freedom (DOF) brought by the transmit subarray splitting of two-dimensional hybrid phased-MIMO radar, this paper presents a design method of transmitting and receiving array based on nested array structure. Firstly, a two-dimensional hybrid phased-MIMO radar transmitting array based on one-dimensional nested array is presented. On this basis, the receiving end is set as a nested array, and finally a virtual array and difference coarray are formed to expand the number of virtual array elements. The expansion increases the DOF of arrays while preserving the advantages of hybrid phased-MIMO radars. Simulation experiments show that compared with the traditional and coprime hybrid phased-MIMO radar, the proposed method can effectively improve the array DOF and Direction-of-Arrival (DOA) estimation accuracy.

scholarly journals Imaging Spectroscopy on Very Large Telescopes

1984 ◽  
Vol 79 ◽  
pp. 515-517
Author(s):  
Paul Atherton
Keyword(s):  
Fourier Transform ◽  
Spatial Information ◽  
Broad Band ◽  
Imaging Spectroscopy ◽  
Wide Field ◽  
Two Dimensional ◽  
Imaging Spectrometer ◽  
Resolution Element ◽  
Fabry Perot ◽  
Large Telescopes

Imaging Spectroscopy is a technique in which a spectrum is obtained for each spatial resolution element across a wide field. The data is essentially 3-D, and may be viewed as a series of monochromatic images, or as a two dimensional array of spectra. A device generating such data may be called an imaging spectrometer. In a previous paper (Atherton, 1983 SPIE 445, 535) three different imaging spectrometers - based on grating, Fabry-Perot and Fourier Transform devices - were compared in terms of their ability to obtain spectral and spatial information over a wide field and broad band, to the same spectral resolution and S/N ratio, using the same detector array. From such a study it is clear that interferometer based devices are significantly faster than conventional grating spectrographs.

Ultrathin stimuli-responsive polymer film-based optical sensor for fast and visual detection of hazardous organic solvents

2018 ◽  
Vol 6 (40) ◽  
pp. 10861-10869 ◽  
Author(s):  
Zhaoyi Wang ◽  
Xueyao Liu ◽  
Yuxin Wu ◽  
Bingbing Liu ◽  
Zhanhua Wang ◽  
...  
Keyword(s):  
Polymer Film ◽  
Organic Solvents ◽  
Optical Sensor ◽  
Rapid Detection ◽  
Sandwich Structure ◽  
Visual Detection ◽  
Stimuli Responsive ◽  
Film Sensor ◽  
Responsive Polymer ◽  
Stimuli Responsive Polymer

UV cross-linkable stimuli-responsive terpolymer (PMMA-co-HEMA-co-GMA)-based “sandwich-structure” ultrathin film sensor for the visual and rapid detection of hazardous organic solvents.

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