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All Journal International Journal of Business, Economics, and Social Development International Journal of Quantitative Research and Modeling International Journal of Ethno-Sciences and Education Research
Yasir Salih
Department of Mathematics, Faculty of Education, Red Sea University, SUDAN
Religion Humanities Computer Science & IT Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Engineering Environmental Science Languange, Linguistic, Communication & Media Mathematics Physics Social Sciences Transportation Other

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Impact of Distance Learning on Mental Health During COVID-19: A Review Yasir Salih; Riza Andrian Ibrahim
International Journal of Ethno-Sciences and Education Research Vol 1, No 4 (2021)
Publisher : Research Collaboration Community (RCC)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (53.662 KB) | DOI: 10.46336/ijeer.v1i4.238

Abstract

The COVID-19 pandemic requires physical activity to reduce its spread. Physical restrictions have a direct impact on the closure of school activities. Distance learning is an alternative for school activities that do not require direct learning communication in one room. However, distance learning can have an impact on students' mental health. This study aims to determine the impact of distance learning during the COVID-19 pandemic on students' mental health.
Investment Portfolio Optimization Model Using The Markowitz Model Emmanuel Parulian Sirait; Yasir Salih; Rizki Apriva Hidayana
International Journal of Quantitative Research and Modeling Vol 3, No 3 (2022)
Publisher : Research Collaboration Community (RCC)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46336/ijqrm.v3i3.344

Abstract

The stock portfolio is related to how someone allocates several shares in various types of investments so that the results achieve maximum profit. By implementing a diversification system or portfolio optimization on several stocks, investors can reduce the level of risk and simultaneously optimize the expected rate of return. This study aims to determine which stocks listed on the Indonesia Stock Exchange (IDX) and included in the portfolio for the 2021-2022 period are eligible to be included in the optimal portfolio and to determine the proportion of funds for each share in the formation of the optimal portfolio. The population in this study are all shares included in the Indonesia Stock Exchange (IDX) listed on the Indonesia Stock Exchange (IDX) for the 2021-2022 period. The sample of this research is five stocks that are candidate portfolios. The sampling method uses a purposive sampling method with the criteria of 5 stocks with the highest positive ratio. The population in this study was all 30 companies included in the IDX30, while the samples were five companies. Data were analyzed using a mean-variant optimization model with a research duration between May 2021 and May 2022. Based on the results of the investment portfolio optimization analysis on the 5 (five) selected stocks, this study shows that, out of 23 stocks, five stocks are eligible to enter the optimal portfolio with their respective proportions, namely PT Adaro Energy Indonesia Tbk (ADRO) 20%, PT Astra International Tbk (ASII) 26%, PT Merdeka Copper Gold Tbk (MDKA) 10%, PT XL Axiata Tbk (EXCL) 19%, PT Bukit Asam Tbk (PTBA) 25%. The portfolio of these stocks generates an expected return of 0.00217 at a risk level of 0.00022. It is hoped that this research can be helpful to add to the literature on investment optimization models, especially the concentration of Mathematics in Finance, and serve as an additional reference for further research, as well as an alternative for investors in optimizing investment portfolios.
MEAN-VARIANCE INVESTMENT PORTFOLIO OPTIMIZATION MODEL WITHOUT RISK-FREE ASSETS IN JII70 SHARE Shindi Adha Gusliana; Yasir Salih
International Journal of Business, Economics, and Social Development Vol 3, No 4 (2022)
Publisher : Research Collaboration Community (RCC)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46336/ijbesd.v3i4.352

Abstract

In investing, investors will try to limit all the risks in managing their investments. Investor strategies to minimize investment risk are diversification by forming investment portfolios, one of which is the Mean-Variance without risk-free assets. The calculation results will show the composition of the optimum portfolio return for each stock that forms the portfolio. Optimum portfolio obtained with wT = (0.39853, 0.25519, 0.13644, 0.09788, 0.11196) sequential weight composition for TLKM, KLBF, INCO, HRUM, and FILM stocks. The composition of this optimal portfolio return is ???? 0.04 with a return of 0.00209 and a portfolio variance of 0.00015. The formation of this portfolio optimization model is expected to be additional literature in optimizing the investment portfolio with the Mean-Variance.
Integration and Innovation in Learning: A Comprehensive Study of Grade 10, 11, and 12 Students in Banten province Dede Irman Pirdaus; Grida Saktian Laksito; Yasir Salih
International Journal of Ethno-Sciences and Education Research Vol 4, No 1 (2024)
Publisher : Research Collaboration Community (RCC)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46336/ijeer.v4i1.562

Abstract

This research aims to evaluate curriculum transformation and integration of innovation in education in Banten province in the face of modern progress. Through a questionnaire to 50 high school students in grades 10 to 12, frequency distribution, class trends and the correlation between perceptions of innovation and skill improvement will be analyzed. The results show students' positive views towards the integration of innovation in all classes. A positive correlation was found between perceived innovation and skills improvement. Analysis of class trends revealed consistency of positive views across classes. Overall, the results of the analysis support students' acceptance of the integration of innovation in the curriculum and its impact on skill improvement.
Co-Authors Dede Irman Pirdaus Emmanuel Parulian Sirait Grida Saktian Laksito Riza Andrian Ibrahim Rizki Apriva Hidayana Shindi Adha Gusliana