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Author

N. Halim

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2 papers indexed here

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Open access Aug 2026

Data-Driven Uncertainty Set Construction with ARIMA–GARCH Modeling for Robust Portfolio Optimization

Portfolio optimization models are highly sensitive to estimation errors in expected returns and covariance matrices, often resulting in unstable allocations. Robust optimization mitigates parameter uncertainty by optimizing against worst-case realizations within a specified uncertainty set, whose construction criticall...

D. Setyawan, D. Chaerani, S. Sukono et al. · 0 citations
Open access Jul 2026

Analyzing Public Opinion on International Conflict Through YouTube Comments Using NLP Techniques

Examination of public opinion formation and polarization surrounding international armed conflicts by analyzing a corpus of 2.4 million YouTube comments harvested from 847 conflict-related video uploads spanning the 2022–2024 period reveals that sentiment volatility spikes within 72 hours of breaking news cycles, befor...

Acep Muchtarom, Alim Jaizul Wahid, N. Halim · 0 citations

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