Abstract: The diameter of a tree is a measure of the longest path between any two nodes in the tree where this path is defined in terms of the number of edges. A Diameter-Constrained Minimum Spanning ...

For many families, it's a familiar scene: heads bent over glowing screens, conversations half-heard and the outside world slowly slipping into the background. That sense of disconnection sits at the ...

An important thing to note is that a tree hollow or tree cavity can occur naturally over time. Regardless of how it forms, it is not necessary to attempt to "plug it" or fill it with any material. In ...

Homeowners should periodically inspect their trees for warning signs. Signs of an unhealthy tree include falling bark, abnormal leaves and the presence of fungus or mushrooms. Certain tree species, ...

Severe weather can turn a seemingly healthy tree into a serious hazard. Arborists say many homeowners don’t realize a tree is in decline until a storm exposes the problem — sometimes with costly or ...

In 2002, Crater Lake National Park ecologist Michael Murray thought the park’s majestic whitebark pine trees were as good as gone. An invasive fungus called white pine blister rust was killing the ...