ScaledUpdateNormalization extends RelatedTweetUpdateNormalization { @Override public double computeLeftNeighborContribution(int leftNodeDegree) { return LN2 / Math.log(leftNodeDegree); }  @Override double computeLeftNeighborContribution(int leftNodeDegree); @Override double computeScoreNormalization(double cooccurrence, int similarNodeDegree,
      int nodeDegree);  }
@Test public void testComputeLeftNeighborContribution() { ScaledUpdateNormalization scaledUpdateNormalization = new ScaledUpdateNormalization(); assertEquals(0.5, scaledUpdateNormalization.computeLeftNeighborContribution(4), 0.01); }