Conceptual prototypes (fig. 1) formed the basis for further testing by solving two problems; a depth limiting device for exact control of the system in a clinical angiographical setting and a detachment zone, thereby leaving the distal part as a plug in the vessel wall to prevent hemorrhage and thus providing a closure method after completion of the intervention.
Silva, now running his own small business in London, says the capital is thriving but is threatened by two problems that afflict the economy: a chronic shortage of housing, and poverty.
But the effectiveness of community services is often undermined by two problems.
Antitrust regulators attempting to frustrate them have always been bedevilled by two problems.
Previously, BPL had been limited to trials in a few thousand homes in America and Britain.The roll-out of BPL was held up by two problems.
Secretary of State John Kerry, after talks with his Russian counterpart, Sergey V. Lavrov, said an internationally brokered cease-fire in Syria had been undermined by two problems: bombings by the Syrian government and attacks by the Nusra Front.
The idea of using a price tag to regulate driving into crowded places has been around for years, but its progress has been slowed by two problems, one big, the other gigantic.
However, the practical applications of these nanoparticle catalysts are always jeopardized by two problems.
Hydrogen's promise as the clean fuel of the future has been frustrated by two problems: how to make it, and how to move it.
39, 40 EPCCE presents 16 written stimuli (eg, a prescription label), each of which is followed by two problem-solving questions.
