Let G = (V, E) be a simple undirected graph with a set V of vertices and a set E of edges. Each vertex v âˆˆ V has an integer valued demand d(v) â‰¥ 0. The source location problem withâ€¦ (More)

Let G = (V, E) be a simple undirected graph with a set V of vertices and a set E of edges. Each vertex v âˆˆ V has a demand d(v) âˆˆ Z+ and a cost c(v) âˆˆ R+, where Z+ and R+ denote the set of nonnegativeâ€¦ (More)

In chest CT images, the dorsal lower lung field often shows an infiltration-like shadow in patients who cannot stop breathing or take a deep breath. The cause of this phenomenon might be due to theâ€¦ (More)