2165 SINGLE POINT PRESSURE: A NEW METHOD OF MONITORING NEUROGENIC BLADDER PATIENTS

We are concerned with the inverse problem of recovering the unknown wave speed and also the source in a multidimensional wave equation. We show that the wave speed coefficient can be reconstructed from the observations of the solution taken at a single point. For the source, we may need a sequence of observation points due to the presence of multiple spectrum and nodal lines. This new method, based on spectral estimation techniques, leads to a simple procedure that delivers both uniqueness and reconstruction of the coefficients at the same time.

Download Full-text

Decomposition Strategies for the Synthesis of Single Input-Single Output and Dual Input-Single Output Compliant Mechanisms

Volume 8: 31st Mechanisms and Robotics Conference, Parts A and B ◽

10.1115/detc2007-35449 ◽

2007 ◽

Author(s):

Charles Kim

Keyword(s):

Compliant Mechanisms ◽

Compliant Mechanism ◽

Single Point ◽

Building Blocks ◽

New Method ◽

Single Input Single Output ◽

Single Output ◽

Alternative Method ◽

Decomposition Strategies ◽

Single Input

In this paper a new method for the synthesis of compliant mechanism topologies is presented which involves the decomposition of motion requirements into more easily solved sub-problems. The decomposition strategies are presented and demonstrated for both single input-single output (SISO) and dual input-single output (DISO) planar compliant mechanisms. The methodology makes use of the single point synthesis (SPS) which effectively generates topologies which satisfy motion requirements at one point by assembling compliant building blocks. The SPS utilizes compliance and stiffness ellipsoids to characterize building blocks and to combine them in an intelligent manner. Both the SISO and DISO problems are decomposed into sub-problems which may be addressed by the SPS. The decomposition strategies are demonstrated with illustrative example problems. This paper presents an alternative method for the synthesis of compliant mechanisms which augments designer insight.

Download Full-text

A New Method of Rice Moisture Content Determination Using Voxel Weighting-Based from Radio Tomography Images

Sensors ◽

10.3390/s21113686 ◽

2021 ◽

Vol 21 (11) ◽

pp. 3686

Author(s):

Nurul Amira Mohd Ramli ◽

Mohd Hafiz Fazalul Rahiman ◽

Latifah Munirah Kamarudin ◽

Latifah Mohamed ◽

Ammar Zakaria ◽

...

Keyword(s):

Moisture Content ◽

Single Point ◽

Moisture Distribution ◽

New Method ◽

Rice Grain ◽

Gravimetric Analysis ◽

Fibre Degradation ◽

One Step ◽

Radio Tomographic Imaging ◽

Moisture Content Determination

This manuscript presents a new method to monitor and localize the moisture distribution in a rice silo based on tomography images. Because the rice grain is naturally hygroscopic, the stored grains’ quality depends on their level of moisture content. Higher moisture content leads to fibre degradation, making the grains too frail and possibly milled. If the moisture is too low, the grains become brittle and are susceptible to higher breakage. At present, the single-point measurement method is unreliable because the moisture build-up inside the silo might be distributed unevenly. In addition, this method mostly applies gravimetric analysis, which is destructive. Thus, we proposed a radio tomographic imaging (RTI) system to address these problems. Four simulated phantom profiles at different percentages of moisture content were reconstructed using Newton’s One-Step Error Reconstruction and Tikhonov Regularization algorithms. This simulation study utilized the relationship between the maximum voxel weighting of the reconstructed RTI image and the percentage of moisture content. The outcomes demonstrated promising results, in which the weighting voxel linearly increased with the percentage of moisture content, with a correlation coefficient higher than 0.95 was obtained. Therefore, the results support the possibility of using the RTI approach for monitoring and localizing the moisture distribution inside the rice silo.

Download Full-text

Toward approximating non-local dynamics in single-point pressure–strain correlation closures

Journal of Fluid Mechanics ◽

10.1017/jfm.2016.730 ◽

2016 ◽

Vol 811 ◽

pp. 168-188 ◽

Cited By ~ 21

Author(s):

Aashwin A. Mishra ◽

Sharath S. Girimaji

Keyword(s):

Experimental Data ◽

Single Point ◽

Turbulence Modelling ◽

Correlation Model ◽

Local Dynamics ◽

Modelling Framework ◽

Point Pressure ◽

Non Local

A key hurdle in turbulence modelling is the closure for the pressure–strain correlation. Herein, the challenge stems from the fact that the non-local dynamics due to pressure cannot be comprehensively incorporated in a single-point closure expression. In this article, we analyse different aspects of the dynamics due to pressure for their amenability with the single-point modelling framework. Based on this, an approach is proposed that incorporates a set of pragmatic compromises in the form and the scope of the model to augment the degree of non-local dynamics that may be approximated by a single-point pressure strain correlation model. Thence, this framework is utilized to formulate an illustrative model. The predictions of this model are compared to numerical and experimental data and contrasted against other established closures over a range of homogeneous flows, under diverse conditions. Finally, the regions of validity in anisotropy space for this illustrative model are delineated using the process realizability criteria for different flows.

Download Full-text

Compaction pressure distribution and pressure uniformity of segmented rollers for automated fiber placement

Journal of Reinforced Plastics and Composites ◽

10.1177/07316844211054166 ◽

2021 ◽

pp. 073168442110541

Author(s):

Yuxiao He ◽

Junxia Jiang ◽

Weiwei Qu ◽

Yinglin Ke

Keyword(s):

Pressure Distribution ◽

Experimental Validation ◽

Compaction Pressure ◽

Single Point ◽

Fiber Placement ◽

Point Pressure ◽

Automated Fiber Placement ◽

Distribution Limits ◽

The Relationship ◽

Single Sequence

For automated fiber placement onto molds with complex surfaces, uneven compaction pressure distribution limits tows number in a single sequence and affects layup quality. Compaction roller has a direct influence on the pressure distribution, but the relationship between the two has not been widely explored. In this paper, the segmented compaction roller is used, and a theoretical model of compaction pressure distribution for layup onto general surfaces is established by analyzing the contact between the roller and prepreg layers, followed by experimental validation. Based on the model, single-point pressure uniformity and whole-path pressure uniformity are proposed to quantitatively evaluate the pressure distribution. Furthermore, pressure distribution and pressure uniformity of segmented roller and common roller are compared, as well as the influence of the two pressure distribution on layup quality. The results show that the established model can predict pressure distribution and provide a basis for analyzing layup defects, and segmented rollers apply evener compaction pressure and help to improve layup quality.

Download Full-text

Alfuzosin in the treatment of high leak-point pressure in children with neurogenic bladder

BJU International ◽

10.1046/j.1464-410x.2002.03008.x ◽

2002 ◽

Vol 90 (7) ◽

pp. 716-720 ◽

Cited By ~ 23

Author(s):

H. Schulte-Baukloh ◽

T. Michael ◽

K. Miller ◽

H.H. Knispel

Keyword(s):

Neurogenic Bladder ◽

Leak Point Pressure ◽

Point Pressure

Download Full-text

Triple crossing number and double crossing braid index

Journal of Knot Theory and Its Ramifications ◽

10.1142/s0218216519500020 ◽

2019 ◽

Vol 28 (02) ◽

pp. 1950002 ◽

Cited By ~ 2

Author(s):

Daishiro Nishida

Keyword(s):

Single Point ◽

Infinite Family ◽

Crossing Number ◽

New Method ◽

Braid Index

Traditionally, knot theorists have considered projections of knots where there are two strands meeting at every crossing. A triple crossing is a crossing where three strands meet at a single point, such that each strand bisects the crossing. In this paper we find a relationship between the triple crossing number and the double crossing braid index for unoriented links, namely [Formula: see text]. This yields a new method for determining braid indices. We find an infinite family of knots that achieve equality, which allows us to determine both the double crossing braid index and the triple crossing number of these knots.

Download Full-text