Practical method to determine the filter shape function used in the three-dimensional Fourier filtering method

2004 ◽  
Vol 53 (3) ◽  
pp. 271-275 ◽  
Author(s):  
T. Kawasaki
Keyword(s):  
Shape Function ◽  
Three Dimensional ◽  
Practical Method ◽  
Filtering Method ◽  
Fourier Filtering

Wave field restoration using three-dimensional Fourier filtering method

2001 ◽  
Vol 90 (1) ◽  
pp. 47-59 ◽  
Author(s):  
Tadahiro Kawasaki ◽  
Yoshizo Takai ◽  
Takashi Ikuta ◽  
Ryuichi Shimizu
Keyword(s):  
Wave Field ◽  
Three Dimensional ◽  
Filtering Method ◽  
Fourier Filtering

Novel, Fourier Filtering Method That Reuses Interference-Patterned Spectra to Extend the Calibration Set for Thickness Determination

2006 ◽  
Vol 60 (2) ◽  
pp. 162-167 ◽  
Author(s):  
Éva Jeszenszky ◽  
László Kocsányi ◽  
Attila Barócsi ◽  
Péter Richter
Keyword(s):  
Filtering Method ◽  
Thickness Determination ◽  
Fourier Filtering

Wormhole solutions in modified f(R,φ,X) gravity

2021 ◽  
Vol 36 (04) ◽  
pp. 2150021
Author(s):  
M. Farasat Shamir ◽  
Adnan Malik ◽  
G. Mustafa
Keyword(s):  
Shape Function ◽  
Scalar Potential ◽  
Three Dimensional ◽  
State Parameter ◽  
Energy Conditions ◽  
Kinetic Term ◽  
Anisotropic Fluid ◽  
Shape Functions ◽  
Current Analysis ◽  
Static Space

This work aims to investigate the wormhole solutions in the background of [Formula: see text] theory of gravity, where [Formula: see text] is Ricci scalar, [Formula: see text] is scalar potential, and [Formula: see text] is the kinetic term. We consider spherically symmetric static space–time for exploring the wormhole geometry with anisotropic fluid. For our current analysis, we consider a particular equation of state parameter to study the behavior of traceless fluid and examine the physical behavior of energy density and pressure components. Furthermore, we also choose a particular shape function and explore the energy conditions. It can be noticed that energy conditions are violated for both shape functions. The violation of energy conditions indicates the existence of exotic matter and wormhole. Therefore, it can be concluded that our results are stable and realistic. The interesting feature of this work is to show two- and three-dimensional plotting for the analysis of wormhole geometry.

scholarly journals Determination of the Optimal Syndesmosis Fixation Angle Using Mortise View of The Ankle Joint

2021 ◽  
Author(s):  
Oğuzhan Tanoğlu ◽  
İzzet Özay Subaşı ◽  
Mehmet Burak Gökgöz
Keyword(s):  
Ankle Joint ◽  
Articular Surface ◽  
Three Dimensional ◽  
Vertical Plane ◽  
Functional Results ◽  
Practical Method ◽  
Medial Malleolus ◽  
Significant Difference ◽  
Horizontal View ◽  
Mortise View

Background: Syndesmosis is an important soft tissue component supporting the ankle stability and commonly injured accompanying with ankle fractures. The accurate reduction and fixation of syndesmosis is essential to obtain better functional results. Therefore, we aimed to find a practical method using the mortise view of ankle to determine the optimal syndesmosis fixation angle intraoperatively. Methods: We randomly selected 200 adults (100 women and 100 men) between 18 - 60 years of age. Three-dimensional anatomical models of tibia and fibula were created using Materialise MIMICS 21. We created a best fit plane on articular surface of medial malleolus and a ninety degrees vertical plane to medial malleolus plane. We determined two splines on cortical borders of tibia and fibula distant from the most superior point of ankle joint in horizontal view. We created two spheres that fit to the predefined splines. The optimal syndesmosis fixation angle was determined measuring the angle between the line connecting the center points of spheres, and the ninety degrees vertical plane to medial malleolus plane. Results: We observed no statistically significant difference between gender groups in terms of optimal syndesmosis fixation angles. The mean age of our study population was 47.1 {plus minus} 10.5. The optimal syndesmosis fixation angle according to mortise view was found as 21 {plus minus} 4.3 degrees. Conclusions: We determined the optimal syndesmosis fixation angle as 21 {plus minus} 4.3 degrees in accordance with the mortise view of ankle. The surgeon could evaluate the whole articular surface of ankle joint with the medial and lateral syndesmotic space in mortise view accurately and at the same position syndesmosis fixation could be performed at 21 {plus minus} 4.3 degrees.

Study of a Fast Windowed Fourier Filtering Method for Interference Fringes

2014 ◽  
Vol 34 (6) ◽  
pp. 0612008
Author(s):  
郭媛 Guo Yuan ◽  
毛琦 Mao Qi ◽  
陈小天 Cheng Xiaotian ◽  
王娜 Wang Na ◽  
赵丽娜 Zhao Lina
Keyword(s):  
Filtering Method ◽  
Interference Fringes ◽  
Fourier Filtering

A practical method of constructing surfaces in three-dimensional digitized space

1987 ◽  
Vol 3 (1) ◽  
pp. 4-12 ◽  
Author(s):  
Ken-ichi Anjyo ◽  
Toshio Ochi ◽  
Yoshiaki Usami ◽  
Yasumasa Kawashima
Keyword(s):  
Three Dimensional ◽  
Practical Method
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