Jakarta State Polytechnic

Thermomechanical Properties of Natural Rubber/OPEFB Composites With Hybrid Latex–Starch Coupling Agent

ABSTRACT Natural rubber composites remain essential for industrial applications in Indonesia, particularly in tire manufacturing, where improved rigidity and strength are required. This study investigates the use of oil palm empty fruit bunch fiber as a sustainable filler to enha...

Ambidextrous leadership and green attitude foster organizational citizenship behavior for the environment through organizational commitment

This study investigates the determinants of Organizational citizenship behavior for the environment (OCBE) in the retail sector, focusing on minimarkets in an emerging-economy context where empirical evidence remains scarce. It integrates employees’ green attitude and ambidextrou...

Enhancing EFL Oral Proficiency through Video-Based Tasks Implemented in a Flipped Classroom

This study investigates patterns associated with the integration of video-based tasks within a flipped classroom model grounded in task-based language teaching (TBLT) in relation to English as a foreign language (EFL) learners’ speaking fluency, accuracy, and engagement. TBLT emp...