Self Awareness and Mitigation of Learning Loss on Students' Science Learning Outcomes During the Covid 19 Pandemic

This study aimed to analyze the correlation between self-awareness, mitigating learning loss, and student science learning outcomes during the COVID-19 pandemic. Data was collected using a correlational study, a questionnaire, and data analysis using linear regression using the SPSS 16.00 application. The analysis results found that the correlation value or R correlation between self-awareness and learning outcomes was 0.020. The coefficient of determination (R2) was 0.000. In contrast, the regression between learning loss and learning outcomes was R, which was -0.073, the coefficient of determination (R2) was 0.005. The self-awareness regression coefficient on the correlation between self-awareness and learning outcomes is 0.018 or only 0.02%, so the equation becomes Y = 83,287 + 0.018X. In the correlation between self-awareness and learning outcomes, the regression coefficient of learning loss is -.119 or only <0, so the regression equation formed is Y = 94.480 -.199X. Therefore, it can be concluded that self-awareness has no correlation with students' cognitive learning outcomes, and there is no correlation between learning loss mitigation and student learning outcomes during the COVID-19 pandemic

Aggregated Technical Commercial and Collection Loss Mitigation Through a Smart Metering Application Strategy

The privatization exercise that led to the creation of 11 distribution companies (Discos) is yet to yield the result of meeting the electricity supply needs of Nigeria. It is in realization of this fact that the Federal Government of Nigeria recently made different proposals and regulations to increase efficiency, availability, and competitiveness within the power industry. This article establishes a technical gain ratio to measure the impact of scaling up smart metering on the aggregated technical commercial and collection (ATC&amp;C) losses. The ATC&amp;C loss is the difference between the amount of electricity received by a distribution company from the transmission company and the amount of electricity for which it invoices its customers plus the adjusted collections loss. To achieve this objective, reviews of historical data of the Discos ATC&amp;C losses and customers’ metering records as published by the Nigerian Electricity Regulatory Commission (NERC) for 2015, 2016, 2017, 2018, and 2020 were carried out. In addition, efforts were made to mathematically model the relationship between % metering and % ATC&amp;C losses as this was the framework to help carry out effective forecasts and analyses of the study in order to show the impact level of the strategy employed. One of the salient technical contributions of this article was that it established that for every 1% increase in metering installation, there is a proportionate 0.8% decrease in ATC&amp;C losses, provided all other factors responsible for technical and commercial losses remain constant. Consequently, improved ATC&amp;C loss reduction would be achieved if Discos adopt a combination of other strategies that would ensure reduction in technical and commercial losses in addition to aggressive deployment of meter assets. However, in practice, factors causing technical and commercial losses are never constant as system components depreciate/burn out with time, energy theft, and pilferage, and meter tamper/bypass is on the increase daily; meter deployment is not aggressive enough to match utility customers’ growth. Hence, the adoption of combined modern strategies in addition to aggressive metering in tandem with customers’ growth has to be employed by Discos in a deliberate attempt to reduce ATC&amp;C losses.

Early On-Set Prediction Of Vortex-Ring State Of Quadrotors

The OpenFOAM CFD package was used to initially investigate the aerodynamic effects of vortex-ring state of a quadrotor, then to study various quadrotor flight maneuvers to minimize the thrust loses of vortex-ring state and followed by possible detection methods for a drone entering vortex-ring state. Vortex-ring state is characteristic of a decrease in the effective angle of attack of incoming airflow due to a rotor descending into its downwash. This causes significant loses in the thrust of the rotor, which typically leads to severe flight upsets for rotorcraft. A quadrotor was studied at varying descent velocities to investigate wake roll-up at the rotor tips and the subsequent effects on rotor thrust and power. The quadrotor was then subjected to non-vertical descent angles to investigate thrust loss mitigation approaches due to vortex-ring state. A method of detecting the on-set of vortex-ring state is proposed using various differential pressure measurements on the quadrotor. It has been shown that by monitoring the pressure difference between the top of the quadrotor body and the bottom of one of the quadrotor legs, a pressure drop can be seen just prior to the on-set of vortex-ring state. This pressure drop was shown to occur during descending flight regimes and may prove to be an effective pre-vortex-ring state warning system.

Early On-Set Prediction Of Vortex-Ring State Of Quadrotors

The OpenFOAM CFD package was used to initially investigate the aerodynamic effects of vortex-ring state of a quadrotor, then to study various quadrotor flight maneuvers to minimize the thrust loses of vortex-ring state and followed by possible detection methods for a drone entering vortex-ring state. Vortex-ring state is characteristic of a decrease in the effective angle of attack of incoming airflow due to a rotor descending into its downwash. This causes significant loses in the thrust of the rotor, which typically leads to severe flight upsets for rotorcraft. A quadrotor was studied at varying descent velocities to investigate wake roll-up at the rotor tips and the subsequent effects on rotor thrust and power. The quadrotor was then subjected to non-vertical descent angles to investigate thrust loss mitigation approaches due to vortex-ring state. A method of detecting the on-set of vortex-ring state is proposed using various differential pressure measurements on the quadrotor. It has been shown that by monitoring the pressure difference between the top of the quadrotor body and the bottom of one of the quadrotor legs, a pressure drop can be seen just prior to the on-set of vortex-ring state. This pressure drop was shown to occur during descending flight regimes and may prove to be an effective pre-vortex-ring state warning system.

Drilling the Point Pleasant-Utica Shale Fractured Formation During the COVID-19 Pandemic Utilizing CBHP MPD with a PMCD Contingency

Drilling the Point Pleasant-Utica formation in the Appalachian Basin has posed challenges to most operators, especially in Western Pennsylvania. A recent well drilled in this region demonstrated that with proper buy-in from the Operator, Constant Bottomhole Pressure (CBHP) Managed Pressure Drilling (MPD) could be the answer when planned and executed correctly. This paper drives the point that MPD is more than simply dropping chokes on location. Prior to drilling the well, the Operator initiated the communication very early with the MPD service provider and created an avenue to reduce the projected mud weight and develop a detailed CBHP MPD plan with a Pressurized Mudcap Drilling (PMCD) contingency. The anticipated challenges on this well were: High-pressure gas fractures, formation instability/shale breakout, severe/total loss of returns, inability to reach Target Depth, and casing/cementing issues. The Operator took time and worked with the new MPD service provider to carefully design and plan a new well (referred to as ‘Y1’ in this document), which helped execute the MPD part of the project within 30 days. In contrast, the MPD execution on a previous well (referred to as ‘X2’ in this document) with the older MPD service provider took more than 90 days. MPD execution on the new MPD well included dynamic influx management and loss mitigation, and understanding of the petro-physical conditions to reach the target. The significant factors that helped drill this well safely with a low Non-Productive Time (NPT) are excellent safety culture, communication, high quality and well-maintained MPD equipment, and a very knowledgeable and highly experienced MPD team. This project was finished within half of the budgeted Authorization for Expenditure (AFE), setting milestones in this region for this Operator.