Arbitrarily shaped coils' inductance simulation based on a 3-dimensional solution of the Biot-Savart law

2013 ◽  
Author(s):  
Chris Volkmar ◽  
Timo Baruth ◽  
Jens Simon ◽  
Ubbo Ricklefs ◽  
Rainer Thueringer
Keyword(s):  
Dimensional Solution ◽  
3 Dimensional ◽  
Simulation Based ◽  
Inductance Simulation

scholarly journals Development of Personalized Fitting Device With 3-Dimensional Solution for Prevention of NIV Oronasal Mask-Related Pressure Ulcers

2018 ◽  
Vol 63 (8) ◽  
pp. 1024-1032 ◽  
Author(s):  
Maiko Shikama ◽  
Gojiro Nakagami ◽  
Hiroshi Noguchi ◽  
Taketoshi Mori ◽  
Hiromi Sanada
Keyword(s):  
Pressure Ulcers ◽  
Dimensional Solution ◽  
3 Dimensional ◽  
Oronasal Mask

scholarly journals Development of a 3-dimensional printed tube thoracostomy task trainer: An improved methodology

2021 ◽  
Vol 6 (1) ◽  
pp. 109-113
Author(s):  
Wen Hao Chen ◽  
Shairah Radzi ◽  
Li Qi Chiu ◽  
Wai Yee Yeong ◽  
Sreenivasulu Reddy Mogali
Keyword(s):  
3D Printing ◽  
Chest Tube ◽  
Fused Deposition Modelling ◽  
3 Dimensional ◽  
Fused Deposition ◽  
Simulation Based ◽  
3D Printed ◽  
Medical Educators ◽  
Based Instruction ◽  
Training Modalities

Introduction: Simulation-based training has become a popular tool for chest tube training, but existing training modalities face inherent limitations. Cadaveric and animal models are limited by access and cost, while commercial models are often too costly for widespread use. Hence, medical educators seek a new modality for simulation-based instruction. 3D printing has seen growing applications in medicine, owing to its advantages in recreating anatomical detail using readily available medical images. Methods: Anonymised computer tomography data of a patient’s thorax was processed using modelling software to create a printable model. Compared to a previous study, 3D printing was applied extensively to this task trainer. A mixture of fused deposition modelling and material jetting technology allowed us to introduce superior haptics while keeping costs low. Given material limitations, the chest wall thickness was reduced to preserve the ease of incision and dissection. Results: The complete thoracostomy task trainer costs approximately SGD$130 (or USD$97), which is significantly cheaper compared to the average commercial task trainer. It requires approximately 118 hours of print time. The complete task trainer simulates the consistencies of ribs, intercostal muscles and skin. Conclusion: By utilising multiple 3D printing technologies, this paper aims to outline an improved methodology to produce a 3D printed chest tube simulator. An accurate evaluation can only be carried out after we improve on the anatomical fidelity of this prototype. A 3D printed task trainer has great potential to provide sustainable simulation-based education in the future.

scholarly journals Using computerized assessment in simulated colonoscopy: a validation study

2020 ◽  
Vol 08 (06) ◽  
pp. E783-E791
Author(s):  
Andreas Slot Vilmann ◽  
Christian Lachenmeier ◽  
Morten Bo Søndergaard Svendsen ◽  
Bo Søndergaard ◽  
Yoon Soo Park ◽  
...  
Keyword(s):  
Assessment Tool ◽  
Assessment Tools ◽  
Continuous Assessment ◽  
Computerized Assessment ◽  
3 Dimensional ◽  
Phantom Model ◽  
Significant Difference ◽  
Simulation Based ◽  
Travel Length ◽  
Colon Data

Abstract Background and study aims Patient safety during a colonoscopy highly depends on endoscopist competence. Endoscopic societies have been calling for an objective and regular assessment of the endoscopists, but existing assessment tools are time-consuming and prone to bias. We aimed to develop and gather evidence of validity for a computerized assessment tool delivering automatic and unbiased assessment of colonoscopy based on 3 dimensional coordinates from the colonoscope. Methods Twenty-four participants were recruited and divided into two groups based on experience: 12 experienced and 12 novices. Participants performed twice on a physical phantom model with a standardized alpha loop in the sigmoid colon. Data was gathered directly from the Olympus ScopeGuide system providing XYZ-coordinates along the length of the colonoscope. Five different motor skill measures were developed based on the data, named: Travel Length, Tip Progression, Chase Efficiency, Shaft movement without tip progression, and Looping. Results The experinced had a lower travel length (P < 0.001), tip progression (P < 0.001), chase efficiency (P = 0.001) and looping (P = 0.006), and a higher shaft movement without tip progression (P < 0.001) reaching the cecum compared with the novices. A composite score was developed based on the five measurements to create a combined score of progression, the 3D-Colonoscopy-Progression-Score (3D-CoPS). The 3D-CoPS revealed a significant difference between groups (experienced: 0.495 (SD 0.303) and novices –0.454 (SD 0.707), P < 0.001). Conclusion This study presents a novel, real-time computerized assessment tool for colonoscopy, and strong evidence of validity was gathered in a simulation-based setting. The system shows promising opportunities for automatic, unbiased and continuous assessment of colonoscopy performance.

The Utility of Simulation in the Management of Patients With Congenital Heart Disease: Past, Present, and Future

2017 ◽  
Vol 22 (1) ◽  
pp. 81-90 ◽  
Author(s):  
Ali Subat ◽  
Andrew Goldberg ◽  
Samuel Demaria ◽  
Daniel Katz
Keyword(s):  
Congenital Heart Disease ◽  
Heart Disease ◽  
Congenital Heart ◽  
Intraoperative Complications ◽  
Care Providers ◽  
3 Dimensional ◽  
Area Of Interest ◽  
Current State ◽  
Simulation Based ◽  
High Acuity

Significant advancements have been made in the diagnosis and management of congenital heart disease (CHD). As a result, a higher percentage of these patients are surviving to adulthood. Despite this improvement in management, these patients remain at higher risk of morbidity and mortality, particularly in the perioperative setting. One new area of interest in these patients is the implementation of simulation-based medical education. Simulation has demonstrated various benefits across high-acuity scenarios encountered in the hospital. In CHD, simulation has been used in the training of pediatrics residents, assessment of intraoperative complications, echocardiography, and anatomic modeling with 3-dimensional printing. Here, we describe the current state of simulation in CHD, its role in training care providers for the management of this population, and future directions of CHD simulation.

A Comparative Study of Tolerance Analysis Methods

2004 ◽  
Author(s):  
Zhengshu Shen ◽  
Gaurav Ameta ◽  
Jami J. Shah ◽  
Joseph K. Davidson
Keyword(s):  
Monte Carlo Simulation ◽  
Monte Carlo ◽  
Tolerance Analysis ◽  
3 Dimensional ◽  
Analysis Methods ◽  
Simulation Based ◽  
Comprehensive Comparison ◽  
Tolerance Charts ◽  
Assembly Constraints ◽  
Tolerance Accumulation

This paper reviews four major methods for tolerance analysis and compares them. The methods discussed are (1) 1D tolerance charts, (2) variational analysis based on Monte Carlo simulation, (3) vector loop (or kinematic) based analysis, and (4) ASU T-Maps© based tolerance analysis. Tolerance charts deal with tolerance analysis in one direction at a time and ignore possible contributions from the other directions. Manual charting is tedious and error-prone, hence attempts have been made for automation. Monte Carlo simulation based tolerance analysis is based on parametric solid modeling; its inherent drawback is that simulation results highly depend on the user-defined modeling scheme, and its inability to obey all Y14.5 rules. The vector loop method uses kinematic joints to model assembly constraints. It is also not fully consistent with Y14.5 standard. ASU T-Maps based tolerance analysis method can model geometric tolerances and their interaction in truly 3-dimensional context. It is completely consistent with Y14.5 standard but its use by designers may be quite challenging. T-Maps based tolerance analysis is still under development. Despite the shortcomings of each of these tolerance analysis methods, each may be used to provide reasonable results under certain circumstances. No guidelines exist for such a purpose. Through a comprehensive comparison of these methods, this paper will develop some guidelines for selecting the best method to use for a given tolerance accumulation problem.

Hierarchy of Preferences toward Disabled Groups: A Reanalysis

1984 ◽  
Vol 59 (1) ◽  
pp. 151-157 ◽  
Author(s):  
Liora Pedhazur Schmelkin
Keyword(s):  
Multidimensional Scaling ◽  
Social Distance ◽  
Dimensional Solution ◽  
3 Dimensional ◽  
Functional Nature

A reanalysis of Tringo's (1970) hierarchy of preference toward disabled groups was conducted through multidimensional scaling. The structure underlying social-distance preferences is multidimensional in nature rather than unidimensional as presented by Tringo. The retained 3-dimensional solution was interpreted as focusing on the visibility of the disabilities, the organic versus functional nature of the disabilities, and an element of ostracism.

scholarly journals Simulation-Based System-Level Conducted Susceptibility Testing Method and Application to the Evaluation of Conducted-Noise Filters

Electronics ◽  
2019 ◽  
Vol 8 (8) ◽  
pp. 908 ◽  
Author(s):  
Junho Joo ◽  
Sang Il Kwak ◽  
Jong Hwa Kwon ◽  
Eakhwan Song
Keyword(s):  
Early Stage ◽  
Testing Procedure ◽  
System Level ◽  
International Electrotechnical Commission ◽  
Conduction Path ◽  
3 Dimensional ◽  
Circuit Simulator ◽  
Testing Method ◽  
Simulation Based ◽  
Noise Filters

In this paper, a simulation-based system-level conducted susceptibility (CS) testing method for a wireless power transfer (WPT) system is proposed. The proposed method employs 3-dimensional electromagnetic (3D EM) models as well as equivalent circuit models to replace the measurement-based CS testing method based on the International Electrotechnical Commission 61000-4-6 standard. The conducted-noise source and equipment under test (EUT) are modeled in a circuit simulator. The conduction path, bulk current injection probe, and calibration jig are modeled using the 3D field simulator. A simple WPT system is designed and fabricated as the EUT for the CS test. The proposed method is successfully verified by comparing the voltage waveforms with measurement-based CS testing method. Additionally, as an application of the proposed method, a simulation-based evaluation of the conducted-noise filters is conducted. By using the proposed method, it is expected that the time and cost expense of setting up the test setup, as well as the testing procedure for the conventional measurement-based CS testing, will be drastically reduced. In addition, the proposed method can be used to estimate the conducted immunity of a system in the early stage of the design cycle prior to production.

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