Figure 6
A network diagram visualizes the co-occurrence of keywords related to smart ports. The diagram features interconnected nodes representing various keywords, with the size of each node indicating its frequency of occurrence. Keywords such as sustainability, performance, management, model, and energy are prominently displayed, suggesting their central role in the context of smart ports. Smaller nodes represent less frequently occurring keywords, which are connected to the larger nodes through lines indicating their relationships. The diagram highlights the interconnected nature of these keywords, illustrating how they relate to each other within the broader topic of smart ports.The co-occurrence of the keyword network on smart ports