W. Sanusi

Do Macroeconomic Variables Improve Rupiah Forecasts under Conditional Heteroskedasticity?

Rupiah exchange-rate forecasting studies are usually univariate and rarely evaluated under a leakage-free protocol against a strong naive benchmark. This study tests whether three macroeconomic variables (Federal Funds Rate, Bank Indonesia policy rate, and Indonesian Consumer Price Index) improve forecasts from a linea...

An integrated strategy for the sustainable development of mangrove ecosystems in the Mamminasata coastal area, South Sulawesi, Indonesia

The development of mangrove ecosystem potential plays a crucial role in maintaining the ecological and economic functions of coastal areas. Although the potential is great, the utilization of mangrove ecosystems in the coastal areas of South Sulawesi has not been optimal due to conflicting interests among stakeholders;...

Optimal Control and Uncertainty Analysis of an SEIRS Model for Online Shopping Addiction among University Students

Optimal Control of an SEIRS Epidemic Model for Online Shopping Addiction Dynamics among University Students

Online shopping addiction is a growing behavioral problem among university students, driven by the rapid development of e-commerce platforms. This study constructs, analyzes, and applies optimal control to an SEIRS (susceptible--exposed--infected--recovered--susceptible) mathematical model of online shopping addiction...