University of Maroua

Rethinking Intellectual Property for Sustainability in OAPI Member States: Exploring Linear and Nonlinear Relationships

ABSTRACT Research on the contribution of intellectual property to sustainability has begun to emerge in Africa; however, the relationship between these variables remains unclear. This article investigates both the linear and non‐linear effects of intellectual property on sustaina...

Unveiling the effects of state capacity on energy diversification in developing countries

Despite increasing scholarly attention on the determinants of energy diversification, the importance of state capacity remains under-examined, especially in developing countries. In this paper, we analyze how the fiscal and legal dimensions of state capacity affect energy diversi...

Nonlinear 2DOF van der Pol vibrations: El-Dib’s optimized frequency formula via the two-time-domains method

This paper presents a systematic decoupling framework for strongly coupled two-degree-of-freedom (2-DOF) nonlinear vibration systems. Here, the coupling is classified as strong rather than weak because the cross-mode interaction terms in the governing equations (e.g., the x 2 y-,...