STUDENTS' PAPER. IRON TUNNELS.

Why Were the Soil Tunnels of Cu Chi and Iron Triangle in Vietnam So Resilient?

At the peak of the Vietnam War, the network of tunnels in the Iron Triangle and Cu Chi linked Viet Cong (VC) support bases over a distance of some 250 km, from the Ho Chi Minh Trail and Cambodian border to the outskirts Saigon. In the early 1960s, the United States escalated its military presence in Vietnam in support of a non-Communist regime in South Vietnam. The North Vietnamese and VC troop...

Tunnels in digital objects

An important concept in digital geometry for computer imagery is that of tunnel. In this paper we obtain a formula for the number of tunnels as a function of the number of the object vertices, pixels, holes, connected components, and 2 × 2 grid squares. It can be used to test for tunnel-freedom a digital object, in particular a digital curve.

Enzymes with molecular tunnels.

As a result of recent advances in molecular cloning, protein expression, and X-ray crystallography, it has now become feasible to examine complicated protein structures at high resolution. For those enzymes with multiple catalytic sites, a common theme is beginning to emerge; the existence of molecular tunnels that connect one active site with another. The apparent mechanistic advantages render...

Wireless Communication in Tunnels

Knowledge and Practice of the students in Tabriz about iron deficiency and iron supplementation

Introduction: Iron supplements, is the most cost effective and common strategy used in developed countries for the control of iron deficiency. Weekly iron supplementation programs in high schools and middle schools for girls in 2006, has been carried out. This study aimed to determine the status and practice of female students about iron deficiency and iron supplementation and its relation to p...