Research on corona discharges from plasma generators has been studied using the line-plane configurations (L-PC). The purpose of this study is to calculate the comparison of the level of conformity of the voltage current characteristic curve (I–V) from the simulation results of numerical calculations of the electrode geometry function and the results of experimental data. There is an electrode (electrode 1) in the form of a rectangular plate with a very thin thickness which has a length and width of a and b respectively in an upright position (line configuration). Electrode 1 has a distance of c to electrode 2 which is in a lying position (plane configuration) below the electrode 1. Furthermore, by using variation of c of 2.5 cm, 2.8 cm, 3.1 cm and 3.4 cm, the two electrodes are connected to the plasma generating equipment, thus producing a plasma discharge that comes out of the tip of the electrode 1 towards electrode 2. Research results from all variations of c prove that there is a high degree of suitability between numerical calculations with experimental data by taking the value of the fitting for the sharpness shape factor of k in the area with the largest plasma discharge.

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Performance evaluation system has a very strategic role in improving the performance of a company. Companies generally judge performance based only on the financial aspect only, regardless of other aspects that are also not less important. This study aims to build a performance evaluation system using a Balanced Scorecard perspective framework that is a financial perspective, customer perspective, internal business process perspective and learning and growth perspective, which can assist decision makers in evaluating performance and prioritizing competitive alternative measures in enhancing the achievement of strategic objectives company. Implementation of the Simple Multi-Attribute Rating Technique Exploiting Ranks (SMARTER) method of performance evaluation system provides the right performance evaluation data. The data were obtained by calculating the criteria and sub-criteria weightings from 4 perspectives and 14 key performance indicators (KPIs) based on the BSC perspective using Rank Order Centroid (ROC) weighting to obtain criteria and sub-criteria rating according to importance level. Base on case studies, the results of this research indicate that the perspective of internal business processes with a priority weight of 0.521 is the most important perspective in evaluating business startup performance, then the customer perspective with a weight of 0.271, then learning and growth perspective with a weight of 0.146 and perspective finance with a weight of 0.063. While the asset turnover performance indicator with a weight value of 0.009 and profit investment with a weight of 0.004 from a financial perspective are important factors for improvement.

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Participant-centered training that uses digital classes leads to changes in the current learning system that focuses on the domain of knowledge. The use of technology in the modern era can be a solution to overcome the issue of expenditure and the quality of educational institutions. The Importance Performance Analysis (IPA) and Webqual methods were chosen in this study because Webqual can translate user opinions in the form of questionnaires and the IPA method is used in managing the results of questionnaire data so that it can produce IPA quadrants. The purpose of this study is to evaluate e-learning websites based on the results of the webqual questionnaire and calculations with the importance-performance analysis method. The questionnaire was distributed to 95 students with various types of study programs at Stikubank University. The results of the calculation of the IPA method indicate that the average student is satisfied with the quality of the e-learning website at 86.75%. Although there are still some parts that can be improved on e-learning websites such as clear instructions, accurate information, and ease of communication.

Highlights• This paper focuses on the (I-V) characteristics calculations of the corona discharge.• The numerical calculation approach uses the concept of the electrode geometry model. • There is an accuracy high degree between the numerical calculations and the research data.

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