We assumed periodic boundary conditions; i.e., a molecule moved to the opposite side when it reached the boundary of its simulation box, except that when it reached the cell surface or its opposite boundary, it was reflected in the mirror direction.
The river and a wetland conservation area form a picturesque eastern boundary; it is a 10-minute walk along its banks to the lower, more touristy, half of town, around the harbour and beach.
However, for a long subsea pipeline without clear boundary, it may not be able to obtain its modal properties reliably.
The country owes its varied topography, and perhaps even its emergence above the waves, to the dynamic boundary it straddles between the Pacific and Indo-Australian Plates.
In general these simulations show that when a population of tumour cells is introduced at the left-hand boundary, it invades the domain and the system evolves to its stable steady state behind the invading front.
If the ant reaches a horizontal boundary, it survives; if the ant reaches a vertical boundary, it dies.
The boundary it blurs is the one between pretending to be somebody else and just being who you are.
Because the pipeline crosses the international boundary, it requires a review by the State Department and presidential approval.
The disease is nondiscriminatory; it strikes every economic group, it knows no boundary, it is literally across the board".
"It is not meant to be a political boundary, it is meant to be a physical barrier," Mr. Netanyahu told a Washington audience two weeks ago.
The Osage orange is often trained as a hedge; when planted in rows along a boundary, it forms an effective spiny barrier.
