The asthenosphere is a part of the upper mantle just below the lithosphere that is involved in plate tectonic movement and isostatic adjustments.n the old oceanic mantle the transition from the lithosphere to the asthenosphere, the so-called lithosphere-asthenosphere boundary (LAB) is shallow (about 60 km in some regions) with a sharp and large velocity drop (5-10%).
direct delivery. Consignment in which the delivery documents (such as a bill of lading) are sent directly to the consignee, without using an intermediary such as a bank.
Direct primary care. In the United States, direct primary care (DPC) is a type of primary care billing and payment arrangement made between patients and providers, without sending claims to insurance providers. It is an umbrella term, incorporating various health care delivery systems that involve direct financial relationships between patients and health care providers.