Chinese scientists are testing whether cyanobacteria, the photosynthetic microorganisms that have shaped Earth’s soils for billions of years, can convert barren desert sand into ground capable of ...

Abstract: The direct position determination (DPD) algorithm in wireless sensor array networks(WSANs) has high localization accuracy under low signal-to-noise ratios ...

Q. I have heard of something called seed inoculation, but I don’t really understand it or where to start. Could you help me educate me on that? — Daniel P.

A 91-year-old man with a history of bladder carcinoma and left total knee arthroplasty was evaluated because of left knee pain. A culture of synovial fluid showed no growth. A diagnosis was made.

Abstract: Finite-thrust spacecraft trajectory optimization problem is studied in this paper. Direct state transition method is applied to single objective and multi-objective optimization problems.