Figure 7
The scatter plot shows a two-dimensional graph with a horizontal axis labeled “Relevance degree (Centrality)” and a vertical axis labeled “Development degree (Density)”, with one dashed vertical reference line and one dashed horizontal reference line intersecting at the center and dividing the plot into four quadrants labeled “Niche Themes” at the upper left, “Motor Themes” at the upper right, “Emerging or Declining Themes” at the lower left, and “Basic Themes” at the lower right. Six circular clusters of different sizes are displayed. The smallest circle appears in the lower left quadrant, positioned to the left of the relevance degree centrality reference line and near the bottom of the development degree density reference line, and it is labeled “migration rates quantitative approach”. A slightly larger circle appears just to the right of the vertical reference line and below the horizontal reference line near the center of the plot, labeled “water quality, environmental monitoring, and rivers”. A larger circle appears in the upper left quadrant, positioned left of the vertical reference line and above the horizontal reference line, labeled “offshore oil well production, gas industry, and gasoline”. Another slightly larger circle appears to the left of the vertical reference line and below the horizontal reference line, labeled “immigration policy, comparative study, and immigrant”. Two nearly equal and larger circles appear in the upper right quadrant, where one is positioned higher and slightly left within the quadrant and is labeled “migration, human, and article”, while the other is positioned lower and slightly right within the same quadrant and is labeled “sustainable development, indonesia, and sustainability”.Thematic evaluation (from 2014 to 2024 years)