By Unknown Lamer from Slashdot's 1950s-science-strikes-back department
writes with an interesting article on possible lighting sources for growing food on the moon and other off-world locations. From the article: "... Agriculture remains the key to living and working off-world. All the mineral ore in the solar system can't replace the fact that for extended periods on the Moon or Mars, future off-worlders will need bio-regenerative systems in order to prosper. Here on earth, researchers still debate how best to make those possible, but nuclear-powered state of the art LED technology is arguably what will drive photosynthesis so necessary to provide both food and oxygen for future lunar colonists. ... Although during the two weeks that make up the long lunar day astronauts might be able to funnel refracted sunlight into covered greenhouses or subsurface lava tunnels, they will be left without a light source during the long lunar night. Current solar-powered battery storage technology isn't adequate to sustain artificial light sources for two weeks at the time. Thus, the most practical solution is simply to use some sort of Radioisotope Thermoelectric Generator, not unlike the one powering the current Mars Science lab, to power the LEDs that will spur photosynthesis in lunar greenhouses. ... On earth, Mitchell says it takes roughly 50 square meters of agriculture to provide both food and oxygen life to support one human. But, as he points out, who can say how productive plants are ultimately going to be on the moon, in gravity that is only one sixth that of earth?"Read Replies (0)
By Unknown Lamer from Slashdot's supervillian-crossover department
An anonymous reader writes, quoting the article: "At the start of this month, news broke that Iran and North Korea have strengthened their ties, specifically by signing a number of cooperation agreements on science and technology. The two states signed the pact on Saturday, declaring that it represented a united front against Western powers. Ayatollah Ali Khamenei, Iran's Supreme Leader, told Kim Yong Nam, North Korea's ceremonial head of state, the two countries have common enemies and aligned goals. On Monday, security firm F-Secure weighed in on the discussion. The company believes Iran and North Korea may be interested in collaborating against government-sponsored malware attacks such as Duqu, Flame, and Stuxnet."Read Replies (0)
By Unknown Lamer from Slashdot's subhurds-for-the-masses department
Orome1 writes "Joanna Rutkowska, CEO of Invisible Things Lab, today released version 1.0 of Qubes, a stable and reasonably secure desktop OS. It is the most secure option among the existing desktop operating systems — even more secure than Apple's iOS, which puts each application into its own sandbox and does not count on the user to make security decisions. Qubes will offer users the option of using disposable virtual machines for executing tasks they believe could harm their computer. These VMs will be lightweight, easily and extremely speedily created and booted, and would be just as easy to discard."
First covered back in 2010
. See some screenshots
of the X11 part in action (and they say displaying clients from multiple "hosts" isn't useful...)Read Replies (0)
By samzenpus from Slashdot's read-all-about-it department
eldavojohn writes "For quite some time humans have struggled to answer the question why there is anything rather than nothing. Jim Holt's Why Does the World Exist? tackles such questions in the form of a journey. After laying a brief groundwork, Holt travels from leading prominent philosopher to curmudgeonly physicist to reserved theologian, visiting each and relaying the juiciest parts of his transcripts to the reader. In doing so, this book takes on an interesting form with a meaty dense center to each chapter (the actual dialogues) surrounded by the light and fluffy bread of Holt's expert writing about the settings, weather and food of his travels. While this consequently lacks the characteristics of a heady hard hitting original philosophical work, these sandwiches should prove quite palatable for most readers. Why Does the World Exist? criss-crosses the etymological, epistemological, theological and philosophical aspects of its title while remaining a fairly easy read."
Keep reading for the rest of eldavojohn's review. Why Does the World Exist?: An Existential Detective Story
author Jim Holt
summary An existential detective story.Read Replies (0)