Prediction of Global Solar Radiation from Sunrise Duration Using Regression Functions

Ismail, A. Haj

doi:10.48129/kjs.15051

Cited by 10 publications

(10 citation statements)

References 5 publications

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“…According to previous investigations, a triangular 2D foam of ideally six-fold coordination remained metastable for a short period of time before collapsing. One defect allowed the foam to maintain its stability in this respect despite the introduction of another 11,12) .…”

Section: Methodsmentioning

confidence: 99%

Exploring the Topological Correlations within Two-Dimensional Foam Structures

A. AbdelKader,

E.A. Dawi,

A. Haj Ismail

2024

Evergreen

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This work presents experimental findings on the stability of a 2D foam confined in a hard cell. The foam's lifetime before breakage increases with bubble size, and introducing a defect stabilizes the foam for a few days. Bubble deformations induced by the defects contribute to this stabilization. The study also investigates disorder evolution around defects in a hexagonal lattice. Topological class distributions show an increase in their second moment with some cases showing late-stage decrease. The findings support simulations and offer insights into coarsening and transient phenomena in foams. The research investigates the topological correlations and variations from expected patterns, emphasizing the impact of the particular foam model employed. In addition, the results provide qualitative support for scaling states and suggest generality in defect behavior, and indicate a significant deviation from the expected stability patterns predicted by existing models.

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Section: Methodsmentioning

confidence: 99%

Exploring the Topological Correlations within Two-Dimensional Foam Structures

A. AbdelKader,

E.A. Dawi,

A. Haj Ismail

2024

Evergreen

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“…However, although some studies including Ismail, (2022) 36) used regression functions such as the root mean square error (RMSE) and mean bias error (MBE) to evaluate the statistical Angstrom-Prescott model, it is beyond the scope of the present study to conduct such studies as the Angstrom-Prescott could be able to show reasonable results when compared to measured data from NASA as well as the regression functions as shown respectively in Hassane, et al (2018) 12) and Ismail, (2022) 36) .…”

Section: Analysis Methodology and Formulationmentioning

confidence: 99%

A Study of Global Solar Radiations Measurement in Java Island, Indonesia

Pachman¹,

Didane²,

Wijianto³

et al. 2023

Evergreen

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Solar energy is well-known renewable energy that has been widely used nowadays. Given that Solar energy is green, inexhaustible, pollution-free and simple to use, it has received significant interest all over the world including in Indonesia. Therefore, the main purpose of the present study is to evaluate and compare the potential of solar energy in six stations on Java Island in Indonesia. The methodology has used the renowned Angstrom-Prescott mathematical method while estimating the global solar radiation in the six stations on java island as a potential to utilize solar energy to be a source of electricity generation. The meteorological data used in this assessment is recorded in daily format for five consecutive years starting from 2015 until 2019. The results show that the area that has the highest global solar radiation potential is Banten city with an average value of 5.43 kWh/m 2 while the city with the lowest global solar radiation potential is Yogya city with an average value of only 5.40 kWh/m 2 . The highest clearness index value among the six provinces is in Jeteng with a value of 0.52 and the lowest is in the province of Jabar with a value of 0.50. Whereas the difference in the daily ratio of the duration of sunlight between one province and another province is very small. Moreover, each province has extraterrestrial solar radiation values increasing from January until June and then decreasing from July until December. Thus, in this study, it is expected that it can raise awareness to reduce conventional energy by utilizing domestic renewable energy.

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“…Meteorological factors, including dawn duration, temperature, and RH, have been used to assess solar radiation at various places. The study showed that higher levels of air pollution were associated with increased solar radiation, which was the greatest during the summer [54][55][56]. PM concentration using a LCS as a detector showed positive R 2 with a reference device [57,58].…”

Section: Introductionmentioning

confidence: 99%

Using a Low-Cost Sensor to Estimate Fine Particulate Matter: A Case Study in Samutprakarn, Thailand

Roddee,

Changphuek,

Jirakajohnkool

et al. 2024

Atmosphere

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This study evaluates low-cost sensors (LCSs) for measuring coarse and fine particulate matter (PM) to clarify and measure air pollution. LCSs monitored PM10, PM2.5 (fine particulates), and PM1.0 concentrations at four sites in Samutprakarn, Thailand from December 2021 to April 2022. Average daily PM10, PM2.5, and PM1.0 concentrations at the monitoring locations were 53–79, 34–45, and 31–43 μg/m3, respectively. In December 2021, the monitoring station had a daily PM2.5 value above 100 μg/m3, indicating haze occurrences. However, the monitoring site’s daily PM10 and PM1.0 concentrations did not surpass Thailand’s ambient air quality threshold. We also measured and calibrated comparative particulate matter concentrations from LCSs and a tapered element oscillating microbalance (TEOM) monitor (Pollution Control Department (PCD) standard analytical method). PM2.5 concentrations from the LCSs were lower than TEOM, but the difference was not statistically significant. The PM2.5 monitoring station provided near-real-time air quality data for health risk reduction, especially when PM levels were high. Based on this study, authorities and local agencies may consider improving air quality regulation in Samutprakan, focusing on suburban PM2.5 air pollution.

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Prediction of Global Solar Radiation from Sunrise Duration Using Regression Functions

Cited by 10 publications

References 5 publications

Exploring the Topological Correlations within Two-Dimensional Foam Structures

Exploring the Topological Correlations within Two-Dimensional Foam Structures

A Study of Global Solar Radiations Measurement in Java Island, Indonesia

Using a Low-Cost Sensor to Estimate Fine Particulate Matter: A Case Study in Samutprakarn, Thailand

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