HYPERNION NUMBERS AND THEIR USE IN THE ANALYSIS OF NETWORKS DRIVEN BY NONSINUSOIDAL SOURCES

2004 ◽  
Vol 13 (01) ◽  
pp. 65-76 ◽  
Author(s):  
Y. BERKOVICH ◽  
A. SHENKMAN
Keyword(s):  
Direct Current ◽  
Efficient Method ◽  
Complex Number ◽  
Numerical Calculations ◽  
Electric Networks ◽  
Hypercomplex Numbers ◽  
Electric Circuits ◽  
Complex Circuits ◽  
Direct Current Circuits ◽  
Standard Software

A method of using hypercomplex numbers for the analysis of linear electric circuits with nonsinusoidal voltages and currents has been proposed. Similar to the complex number method for circuits with sinusoidal voltages and currents, the proposed method reduces the analysis of nonsinusoidal circuits to the analysis of direct-current circuits. A special system of hypercomplex numbers, called hypernions, has been created in order to obtain a new efficient method for analyzing nonsinusoidal networks. This system is interesting in that it expands the concept of numbers and attaches meaning to equations and transformations involving discontinuous functions and makes it possible to describe various non-Euclidean spaces. It is shown that the proposed method of analysis of linear nonsinusoidal electric networks makes it possible to carry out numerical calculations for complex circuits by using standard software.

Cost-effectiveness of digoxin, pacing, and direct current cardioversion for conversion of atrial flutter in neonates

2018 ◽  
Vol 28 (5) ◽  
pp. 725-729
Author(s):  
Deepa Prasad ◽  
Joni Steinberg ◽  
Christopher Snyder
Keyword(s):  
Cost Effectiveness ◽  
Atrial Flutter ◽  
Direct Current ◽  
Efficient Method ◽  
Meta Analysis ◽  
Cost Effective ◽  
Success Rates ◽  
Direct Current Cardioversion ◽  
Neonatal Icu ◽  
The Cost

AbstractIntroductionNewborn atrial flutter can be treated by medications, pacing, or direct current cardioversion. The purpose is to compare the cost-effectiveness of digoxin, pacing, and direct current cardioversion for the treatment of atrial flutter in neonates.Materials and methodsA decision tree model was developed comparing the efficacy and cost of digoxin, pacing, and direct current cardioversion based on a meta-analysis of published studies of success rates of cardioversion of neonatal atrial flutter (age<2 months). Patients who failed initial attempt at cardioversion progressed to the next methodology until successful. Data were analysed to assess the cost-effectiveness of these methods with cost estimates obtained from 2015 Medicare reimbursement rates.ResultsThe cost analysis for cardioversion of atrial flutter found the most efficient method to be direct current cardioversion at a cost of $10 304, pacing was next at $11 086, and the least cost-effective was digoxin at $14 374. The majority of additional cost, regardless of method, was from additional neonatal ICU day either owing to digoxin loading or failure to covert. Direct current cardioversion remains the most cost-effective strategy by sensitivity analyses performed on pacing conversion rate and the cost of the neonatal ICU/day. Direct current cardioversion remains cost-effective until the assumed conversion rate is below 64.6%.ConclusionThe most cost-efficient method of cardioverting a neonate with atrial flutter is direct current cardioversion. It has the highest success rates based on the meta-analysis, shorter length of stay in the neonatal ICU owing to its success, and results in cost-savings ranging from $800 to $4000 when compared with alternative approaches.

The Development of Physics Education Game on Direct Current Electric Circuit for Learners

2021 ◽  
Vol 1 (1) ◽  
pp. 50-62
Author(s):  
Jati Zen Ma'ruf
Keyword(s):  
Direct Current ◽  
Physics Education ◽  
Electric Circuit ◽  
Student Response ◽  
Educational Game ◽  
Average Score ◽  
Distribution Data ◽  
Response Sheet ◽  
Physics Learning ◽  
Electric Circuits

This study is the research of the development of physics education game application. This study has two purposes, namely to (1) developing multimedia for physics learning in the form of a physics education game on direct current electric circuits, (2) knowing the quality of educational game applications that have been produced according to experts, (3)knowing the user's (student's) response to the media of physics learning in the form of educational game applications related to direct current electrical circuit. The development procedure in this study refers to the Luther-Sutopo procedure consisting of the stage of concept, design, material collecting, assembly, testing, and distribution. Data collection techniques in the research in this study using a questionnaire. The research instrument in this study was a validation and assessment sheet which was adapted from the rubric for evaluating C. Stewart's educational game, student response sheets, and the game tester response sheet. Product validation and assessment uses a Likert scale with 4 scales and students' responses use the Guttman scale, while the game tester response sheet uses descriptive analysis. The results of this study are products in the form of simulation physics education game applications in direct current electric circuits, the results of the validation and assessment of material experts and media experts, the educational game application scored 3.8 and 3.3 in a very good category. The results of the user’s (student’s) response to the direct current electric circuit educational game application developed got an average score of 0.97 with the agreed category.

DIRECT-CURRENT CIRCUITS

1984 ◽  
pp. 576-601
Author(s):  
George B. Arfken ◽  
David F. Griffing ◽  
Donald C. Kelly ◽  
Joseph Priest
Keyword(s):  
Direct Current ◽  
Direct Current Circuits
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