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Subjective surfaces: A method for completing missing boundaries

A. Sarti, R. Malladi, J. A. Sethian
2000 Proceedings of the National Academy of Sciences of the United States of America  
We present a model and algorithm for segmentation of images with missing boundaries.  ...  Completion models, which postulate how to construct missing data, are popular, but are often trained and specific to particular images.  ...  In this paper we propose a method for segmentation of images with missing boundaries.  ... 
doi:10.1073/pnas.110135797 pmid:10823902 pmcid:PMC18589 fatcat:jxlvafvxarerxfjjcohshto2yi

Nanobeams and AFM Subject to Piezoelectric and Surface Scale Effects

Julio Claeyssen, Rosemaira Copetti, Leticia Tonetto, Joao Carvalho
2018 Advances in Mathematical Physics  
The modeling equations with piezoelectric and surface scale effects are written as a matrix differential equation subject to tip-sample general boundary conditions and to compatibility conditions for the  ...  Simulations were performed for a two stepped beam with a piezoelectric patch subject to pulse forcing terms.  ...  Acknowledgments This work was performed as part of the employment of the authors at their institutions and the third author held a fellowship no. 140823/2014-0 from CNPq of Brazil.  ... 
doi:10.1155/2018/9268973 fatcat:wlbrcx3fc5gutfku3fooopoea4

Effect of Surface Roughness and Temperature on EHL for Parallel Surfaces Subjected to High Acceleration

U.A. Zia, A.A. Baqai, W. Akram
2014 Tribology in Industry  
the applicability of the model chosen for solution.  ...  The lubrication solution proposed is a modification of "Numerical model for mixed lubrication" presented in 1990s. Present research is an extension of author's previous work in the same.  ...  Acknowledgement The Author would like to thank faculty of Mechanical Engineering of NUST College of Electrical and Mechanical Engineering for the material and technical support offered during the completion  ... 
doaj:abbff035e6f3401fbfdd5689859b6a6d fatcat:s44dqc6nezhlxmqkebssvw2pcm

Macrophage Image Segmentation by Thresholding and Subjective Surface Method

Seol Ah Park, Tamara Sipka, Zuzana Krivá, Martin Ambroz, Michal Kollár, Balázs Kósa, Mai Nguyen-Chi, Georges Lutfalla, Karol Mikula
2020 Tatra Mountains Mathematical Publications  
The first one is based on the Otsu thresholding and the second one on the information entropy thresholding, both followed by the classical subjective surface (SUBSURF) method.  ...  The automatic approach is a combination of thresholding and the classical subjective surface segmentation (SUBSURF) method.  ...  On the other hand, the SUBSURF method can effectively complete missing parts of boundary, join adjacent level-lines, as well as rapidly remove a noise.  ... 
doi:10.2478/tmmp-2020-0007 fatcat:yscrolvnznczzbps3xm3xg5gyq

Improving the crashworthiness characteristics of cylindrical tubes subjected to axial compression by cutting wide grooves from their outer surface

F. Mokhtarnezhad, S. Salehghaffari, M. Tajdari
2009 International Journal of Crashworthiness  
This paper investigates a new and efficient design method to encourage axisymmetric collapsing mode in tubes with higher length than the critical length to collapse in concertina mode when subjected to  ...  An analytical model to predict mean crush force of the new shock absorber is also developed in the present study.  ...  On the other hand, while diamond and mixed modes are considerably more likely to occur than other collapsing modes for a common dimension of tube, little changes in loading and boundary conditions can  ... 
doi:10.1080/13588260902896466 fatcat:ktkylgsmszeb5grmxupkfxeyaq

An inclined surface crack subject to biaxial loading

V.N. Shlyannikov, A.V. Tumanov
2011 International Journal of Solids and Structures  
The elastic-plastic stress fields and mode mixity parameters for semi-elliptical surface cracks on biaxial loaded plates have been investigated using detailed three-dimensional finite element calculations  ...  These analyses were performed for different surface flaw geometries to study the combined load biaxiality and mode mixity effects on the crack-front stress fields and the size and shape of the plastic  ...  surface flaws is far from complete.  ... 
doi:10.1016/j.ijsolstr.2011.02.024 fatcat:jw3rl3fqmzgankydwy4rqx2ute

Large eddy simulation of LDL surface concentration in a subject specific human aorta

Jonas Lantz, Matts Karlsson
2012 Journal of Biomechanics  
The goal of this study was to model blood flow within a subject specific human aorta, and to study how the LDL surface concentration changed during a cardiac cycle.  ...  With measured velocity profiles as boundary conditions, a scale-resolving technique (large eddy simulation, LES) was used to compute the pulsatile blood flow that was in the transitional regime.  ...  As a wall-free model was used in the simulations, a boundary condition which allows for mass transfer through the wall was set on the arterial surface.  ... 
doi:10.1016/j.jbiomech.2011.11.039 pmid:22153749 fatcat:vuunfmkjo5b6tedk4vlfejj2qi

Numerical Simulations of Exposed Circular Surface of Rolled Homogeneous Armor Steel Plates Subjected to Blast Loadings by Using AUTODYN 2D

Mohd Zaid Othman, Lee Choon Yuan, Mohd Aidil Mohd Yusop, Amir Radzi Ab Ghani, Md Fuad Shah Koslan, Jestin J., Ahmad Mujahid Ahmad Zaidi
2015 Modern Applied Science  
Three main geometrical parts namely; air, trinitrotoluene and rolled homogeneous armour steel plate are modelled in AUTODYN 2D utilising the LAGRANGE and EULER element formulations' solvers.  ...  to the experimental results from a published paper.  ...  The simulations' steps that will be presented in this section include geometric modelling of air, spherical TNT, exposed circular surface of RHA plate; meshing, assigning the appropriate material properties  ... 
doi:10.5539/mas.v9n3p216 fatcat:ry5jflj7drgglmuxwlinv7e7nq

Stress Intensity Factors for Embedded, Surface, and Corner Cracks in Finite-Thickness Plates Subjected to Tensile Loading

Jesús Toribio, Beatriz González, Juan-Carlos Matos, Óscar Mulas
2021 Materials  
, for different crack geometries (relative depths and aspect ratios) and crack configurations (embedded, surface, and corner).  ...  The aim of this study is to obtain the stress intensity factor (SIF) along the crack front of elliptical cracks located in finite-thickness plates subjected to imposed displacement or applied tensile load  ...  For surface and corner configurations, the existence of a boundary layer is observed: a small part of the crack front at the intersection with the plate outer surface (point B for the surface crack, points  ... 
doi:10.3390/ma14112807 pmid:34070350 fatcat:n7buhztk3rek3jvwac77lzacru

Acoustic fields and microfluidic patterning around embedded micro-structures subject to surface acoustic waves

David John Collins, Richard O'Rorke, Adrian Neild, Jongyoon Han, Ye Ai
2019 Soft Matter  
Recent research has shown that interactions between acoustic waves and microfluidic channels can generate microscale interference patterns with the application of a traveling surface acoustic wave (SAW  ...  To build a more complete understanding of channel interface effects on the surrounding acoustic field, in this work we develop generalized acoustic interaction models for channel interfaces subject to  ...  for predicting interference patterns near channel features subject to a travelling SAW.  ... 
doi:10.1039/c9sm00946a fatcat:dac435lbl5gi7p5wfd2gcvfoju

Boundary friction characterisation of a used cylinder liner subject to fired engine conditions and surface deposition

S.R. Bewsher, M. Leighton, M. Mohammadpour, H. Rahnejat, G. Offner, O. Knaus
2019 Tribology International  
Acknowledgement The authors of this work wish to show their thanks to the Engineering and Physical Sciences Research Council (EPSRC) and to our industrial collaborators AVL List GmbH for the financial  ...  At TDC the compression ring is subject to higher contact pressures and boundary friction as a result of combustion.  ...  The work carried out in this study uses a cylinder liner from a modern IC engine which has run for 105,000 miles under urban driving cycle with a fully formulated existing lubricant with a complete additive  ... 
doi:10.1016/j.triboint.2018.11.005 fatcat:m7ppdkswsbbp5o3vecdsn2b64m

Thermal induced motion of functionally graded beams subjected to surface heating

Pravin Malik, Ravikiran Kadoli
2018 Ain Shams Engineering Journal  
Thin beam of the functionally graded (FG) type subjected to a step heat input on one surface and insulated or exposed to convective heat loss on the opposite surface is under consideration for the evaluation  ...  It is found that attenuation of the amplitude of static thermal deflection and superimposed thermal oscillations is a strong function of the metal-ceramic combination for the FG beam.  ...  The aim of this article was to have detailed investigation on the thermal induced vibration of a FG beam when subjected to a step thermal load for various structural boundary conditions.  ... 
doi:10.1016/j.asej.2015.10.010 fatcat:ngtqokiznzbyvazje4sivhnn5m

Left ventricular volume and endocardial surface area by three-dimensional echocardiography: Comparison with two-dimensional echocardiography and nuclear magnetic resonance imaging in normal subjects

Aasha S. Gopal, Donald L. King, Donald L. King, Andrew M. Keller, Richard Rigling
1993 Journal of the American College of Cardiology  
We evaluated a threemdi e~io~al echocardiographic method for ventricular volume and surface area determim nation that uses polyhedral surface reconstruction.  ...  Cineangiography has several limitations, the most important of which is a requirement far geometric .  ...  The in vitro model used to validate the three-dimensional echocardiographic method for total endocardial surface area and infarct surface area was a pin model, in which pinheads mounted in three parallel  ... 
doi:10.1016/0735-1097(93)90842-o pmid:8509549 fatcat:rhdlzabwe5boxblkvmulchte5u

Water at solid surfaces: A review of selected theoretical aspects and experiments on the subject

M. Maccarini
2007 Biointerphases  
Despite the considerable amount of work, the way water molecules are organized at the interface is still a source of debate.  ...  Grunze is gratefully acknowledged for fundamental advice and suggestions on how to organize the present work. Professor A. J. Pertsin, Dr. M Himmelhaus, Dr. R. Steitz, Professor R. Netz, Professor E.  ...  Shen are acknowledged for the useful discussions.  ... 
doi:10.1116/1.2768902 pmid:20408643 fatcat:5adndss6vfa3pfy5yhls6yotfu

Effect of grain sorting on gravel bed river evolution subject to cycled hydrographs: Bed load sheets and breakdown of the hydrograph boundary layer

Chenge An, Xudong Fu, Guangqian Wang, Gary Parker
2017 Journal of Geophysical Research - Earth Surface  
In this paper, we implement a 1-D morphodynamic model for this problem. The model is first validated with data for both flume experiments and numerical simulations.  ...  by a hydrograph boundary layer (HBL) located near the upstream end of the river.  ...  for problems with long length scales, the morphological model approaches a parabolic model for uniform sediment and a mixed parabolic/simple wave model for sediment mixtures.  ... 
doi:10.1002/2016jf003994 fatcat:megy4olaizh7faketmwmlcxclu
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