Revealing ion transport at the nanoscale

EPFL researchers have shown that a law of physics having to do with electron transport at nanoscale can also be analogously applied to ion transport. This discovery provides insight into a key aspect of how ion channels function ...

Coulomb blockade in organic conductors found, a world first

Generally, organic conductors has disorder structures so charge transfers from one place with high conductivity to another place with high conductivity. In such occasions, Coulomb blockade of charge transport takes place. ...

Australian lawmakers block super-trawler

Australia blocked a controversial super-trawler from fishing in its waters Thursday in a narrow parliamentary vote which forced concessions from the centre-left Labor government.

Ovastacin cuts off sperm binding

A study in The Journal of Cell Biology describes how a secreted enzyme helps egg cells avoid being fertilized by more than one sperm.

Assange: Financial blockade may close WikiLeaks (Update)

(AP) -- WikiLeaks - whose spectacular publication of classified data shook world capitals and exposed the inner workings of international diplomacy - may be weeks away from collapse, the organization's leader warned Monday.

Visa again blocks funds for WikiLeaks

(AP) -- Visa said Friday it has closed a donation channel to WikiLeaks after a payment processor briefly accepted money transfers to the anti-secrecy site.

Cuba criticizes Microsoft blocking Messenger

(AP) -- Cuba criticized Microsoft on Friday for blocking its Messenger instant messaging service on the island and in other countries under U.S. sanctions, calling it yet another example of Washington's "harsh" treatment ...

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Blockade

A blockade is an effort to cut off food, supplies, war material or communications from a particular area by force, either in part or totally. A blockade should not be confused with an embargo or sanctions, which are legal barriers to trade, and is distinct from a siege in that a blockade is usually directed at an entire country or region, rather than a fortress or city. Most blockades historically took place at sea, with the blockading power seeking to cut off all maritime transport from and to the blockaded country; although stopping all land transport to and from an area may also be considered a blockade. In the 20th century air power has also been used to enhance the effectiveness of the blockade by halting all air traffic within the blockaded air space.

Close patrol of the hostile ports, in order to prevent naval forces from putting to sea, is also referred to as a blockade. When a coastal cities or fortresses were besieged from the landward side, the besiegers would often blockade the seaward side as well. Most recently, blockades have sometimes included cutting off electronic communications by jamming radio signals and severing undersea cables. Israel and its blockade of the Gaza Strip since 2001 has received the most attention as a continuing crisis.

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