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This Author published in this journals
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
Dede Irman
Communication in Research and Publications, Bandung, Indonesia
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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AI Adoption in Business: Opportunities and Challenges for Start-ups Dede Irman; Deva Putra
International Journal of Business, Economics, and Social Development Vol. 6 No. 1 (2025): International Journal of Business, Economics, and Social Development (IJBESD)
Publisher : Rescollacom (Research Collaborations Community)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46336/ijbesd.v6i1.881

Abstract

Artificial intelligence (AI) has become a technology that plays an important role in business transformation, including in the start-up sector. This study aims to analyze the opportunities and challenges in adopting AI in start-up businesses and its impact on company performance. The research method used is a qualitative and quantitative approach by collecting data through surveys, interviews, and literature studies. The results of the study show that AI provides various benefits for start-ups, such as increasing operational efficiency, optimizing decision-making, personalizing customer service, and reducing labor costs. The fintech and e-commerce sectors are the industries with the highest rates of AI adoption due to the need for automation and data security. However, the implementation of AI also faces various challenges, including high costs, limited expertise, integration with legacy systems, and data security and regulatory issues. Further analysis shows that start-ups that successfully adopt AI have a mature strategy in technology investment and human resource development. In addition, the effective implementation of AI can increase the competitiveness of start-ups and support sustainable business growth. Therefore, a strategic approach is needed in facing the challenges of AI implementation so that the benefits obtained can be optimized. This study is expected to provide insights for business owners, investors, and policy makers in developing more effective AI adoption strategies in the future.
Efficient Frontier Analysis of Islamic and Conventional Bank Stock Portfolios: Evidence from Four IDX-Listed Issuers Using the Markowitz Model Dede Irman; Alim Jaizul Wahid
International Journal of Quantitative Research and Modeling Vol. 7 No. 2 (2026): International Journal of Quantitative Research and Modeling (IJQRM)
Publisher : Research Collaboration Community (RCC)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46336/ijqrm.v7i2.1340

Abstract

This study investigates and compares the portfolio performance of Islamic and conventional bank stocks listed on the Indonesia Stock Exchange (IDX) using the Markowitz Mean-Variance optimization model. Four issuers were selected: PT Bank Rakyat Indonesia Tbk (BBRI), PT Bank Mandiri Tbk (BMRI), PT Bank Rakyat Indonesia Syariah Tbk (BRIS), and PT Bank Pembangunan Daerah Banten Tbk (BPAA), representing two conventional and two Islamic banking stocks respectively. Daily closing price data spanning from January 2021 to December 2023 (756 trading days) were employed to compute expected returns, variance, covariance, and correlation coefficients. Two optimal portfolios were constructed for each category: the Minimum-Variance Portfolio (MVP) and the Maximum-Sharpe Portfolio (MSP). Performance evaluation was carried out through multiple metrics including the Sharpe Ratio, Treynor Ratio, Jensen's Alpha, and Sortino Ratio. Results indicate that Islamic bank portfolios consistently outperform conventional bank portfolios on a risk-adjusted basis. The Maximum-Sharpe Islamic portfolio achieved a Sharpe Ratio of 1.765 compared to 1.342 for its conventional counterpart. These findings suggest that Islamic banking stocks, with their inherently lower leverage and prohibition on speculative instruments, exhibit more favourable risk-return characteristics, providing actionable insights for investors seeking Shariah-compliant investment alternatives.
Analysis of Students' Critical Thinking Skills in Solving SDGs-Based Contextual Mathematics Problems Dede Irman; Vera Vera
International Journal of Ethno-Sciences and Education Research Vol. 6 No. 3 (2026): International Journal of Ethno-Sciences and Education Research (IJEER)
Publisher : Research Collaboration Community (Rescollacom)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46336/ijeer.v6i3.1049

Abstract

This study, entitled "Analysis of Students' Critical Thinking Skills in Solving SDGs-Based Contextual Mathematics Problems," aims to analyze junior high school students' critical thinking skills in solving contextual mathematics problems designed based on the Sustainable Development Goals (SDGs) theme. The study was conducted using a qualitative descriptive approach through open-ended written tests and in-depth interviews with six students with high, medium, and low academic ability categories. Data were analyzed based on four critical thinking indicators: interpretation, analysis, inference, and evaluation. The results showed significant variations among student ability categories. High-ability students were able to understand the context, connect quantitative data with reality, draw logical conclusions, and critically evaluate alternative solutions, especially on the theme of clean water scarcity (SDG 6). In contrast, students with medium and low abilities still faced difficulties in transferring narrative information to mathematical models and justifying evidence-based answers. These findings indicate that the integration of SDGs-based problems in mathematics learning effectively promotes higher-order thinking skills, global awareness, and students' reflective attitudes towards sustainability issues. However, the success of this approach requires strengthening quantitative literacy, ongoing contextual guidance, and the development of challenging yet relevant test instruments. Practically, this research emphasizes the importance of synergy between a contextual learning approach and the principles of the Independent Curriculum to develop a generation of critical, socially aware learners who are ready to face global challenges.
Co-Authors Alim Jaizul Wahid Deva Putra Vera Vera