Plutonium isotopes are artificial radionuclides in the environment, which have drawn significant attentions due to its high radiotoxicity and the possibility of sources linked with nuclear accidents in recent years. The level, regional distribution, sources and transport pathway of plutonium...

Purpose The purpose of this paper is to propose the situation that the existing parking automated guided vehicle (AGV) has a single walking mode, a spin forward motion mode based on a dual steering wheel driven parking AGV. In this way, the AGV can complete the 180° spin of the AGV in the...

Tanzania is well placed to receive a significant increase in aid inflows in coming years. Despite the potential for the additional aid inflows to raise income levels in the country, increasing them may bring about structural changes in the economy that may be unwelcome. One such change is an...