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When coral reefs change, researchers and local fishing communities see different results（图）
coral reefs change researchers local fishing communities different results
2019/11/22
Find related stories on NSF's Environmental Research and Education (ERE) programs at this link; find related stories on NSF's Long-Term Ecological Research Program at this link.Results of a new study ...
Rival sperm and choosy eggs:FSU researcher finds that when sperm compete,eggs have a choice（图）
Rival sperm choosy eggs FSU researcher sperm compete eggs have a choice
2017/11/23
The delicately mannered dance between discerning eggs and vying sperm is more complicated than scientists once believed, and it may hold secrets about the evolution of new species.In a paper published...
Arctic melt ponds form when meltwater clogs ice pores（图）
Arctic melt ponds meltwater clogs ice pores
2017/2/16
When spring comes to the Arctic, the breakup of the cold winter ice sheets starts at the surface with the formation of melt ponds. These pools of melted snow and ice darken the surface of the ice, inc...
When corals met algae:Symbiotic relationship crucial to reef survival dates to the Triassic
corals algae Symbiotic relationship reef survival dates the Triassic
2016/11/29
The mutually beneficial relationship between algae and modern corals — which provides algae with shelter, gives coral reefs their colors and supplies both organisms with nutrients — began more than 21...
I recall exactly what I was doing when I learned that John F. Kennedy was shot; and I recall exactly what I was doing when I learned of the 9/11 attacks. We all have attended events or witnessed activ...
THE OCEANOGRAPHY CLASSROOM:Why Teach What When?
OCEANOGRAPHY CLASSROOM Why Teach What When?
2015/7/17
Most readers of this column hold academic positions that include the responsibility of teaching. Some of my previous articles have suggested ways the teaching process might be made more effective, but...
Valuable mineral resources are widely distributed throughout the seabed. autonomous underwater vehicles (AUVs) are preferable to remotely-operated vehicles (ROVs) when probing for such mineral resources as the extensive exploration area makes it difficult to maintain contact with operators. AUVs depend on batteries, so their power consumption should be reduced to extend exploration time. Power for conventional marine instrument systems is incorporated in their waterproof sealing. External intermittent control of this power source until termination of exploration is challenging due to limitations imposed by the underwater environment. Thus, the AUV must have a power control system that can improve performance and maximize use of battery capacity. The authors developed such a power control system with a three-step algorithm. It automatically detects underwater operational states and can limit power, effectively decreasing power consumption by about 15%.
surface piercing propeller boundary element method hydrodynamic characteristics
2011/9/13
Demand for high-speed marine vehicles (HSMVs) is high among both commercial and naval users. It is the duty of the marine vessel’s designer to provide a hull and propulsion system that diminishes drag...