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How Curved Spacetime Can Be Created In a Quantum Optics Lab

Katatsumuri Analogue (87 comments)

Related news: How faster-than-light travel can be created in a reflected sunlight spot.

2 days ago
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MIT Study Finds Fault With Mars One Colony Concept

Katatsumuri Re:To quote Sir Arthur Clarke... (269 comments)

There is no formal obligation, of course. It's just that this study has some apparent authority, and can be bad for Mars One PR. And PR is currently the main driving factor for them.

about two weeks ago
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MIT Study Finds Fault With Mars One Colony Concept

Katatsumuri MOD PARENT UP (269 comments)

Nuclear reactors may be heavy, but they surely do not necessarily all require hundreds of people to operate them.

about two weeks ago
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MIT Study Finds Fault With Mars One Colony Concept

Katatsumuri MOD PARENT UP (269 comments)

The parent post has the perspective that many other posts here lack.

about two weeks ago
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MIT Study Finds Fault With Mars One Colony Concept

Katatsumuri Re:Stop that stupid clarke quote forever please (269 comments)

Your point is very logical.

My point was that it is sometimes hard to prove something impossible, because there are innumerable, sometimes unexpected, ways to approach the implementation. I picked that quote as a quickly recognizable meme with a similar message that saves people some processing time, because they already met it and considered it. Please don't take it literally. The elderly scientist obviously does not apply in this context.

The MIT study does not seem to raise any fundamental reasons (like speed of light, mass of Solar system, anything like that) why a Mars base is impossible. They nitpick around the engineering details, some of which are their own assumptions. If you like finding logical fallacies, the whole thing has signs of a strawman argument.

about two weeks ago
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MIT Study Finds Fault With Mars One Colony Concept

Katatsumuri Re:To quote Sir Arthur Clarke... (269 comments)

Yes, that is an important distinction. But in recent years, the gap between possible and practical tends to shorten quite fast. I guess they take advice from the "singularitarian" type futurists, and base their plans on the expectation of accelerating growth in available technology and resources. That is a risky bet, but until they actually send a person to space, they only risk as much as your next TV startup. And who knows if that will ever happen. However, there is hope they will help to promote and advance the necessary technology.

about two weeks ago
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MIT Study Finds Fault With Mars One Colony Concept

Katatsumuri Re:To quote Sir Arthur Clarke... (269 comments)

That's the experience with antarctic bases because it is cheaper to send supplies there. The balance is different on Mars. There was no experiment so far wit an explicit goal and sufficient funding to achieve as much self-sufficiency as possible in Antarctic. Space station is closer, but it's a closed system, so also different. We can use our experience from both cases, but Mars will be unique.

about two weeks ago
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MIT Study Finds Fault With Mars One Colony Concept

Katatsumuri Re:Not Just Mars One (269 comments)

It is largely about Mars One and their timeline. For example, they assume Falcon Heavy to be the largest available transport, while SpaceX Raptor engine and Mars Colonial Transporter may become available shortly after the Mars One projected dates.

It is impossible to imagine every possible approach to build a Mars Base, so it is logical that they evaluate a specific plan.

They also make a lot of assumptions, for example: "If crops grown on Mars are the only food source, they will produce unsafe oxygen levels in the habitat." I imagine that beside traditional crops, one could use algae, bacteria, maybe insects to try and balance that. Also, as a Mars base is not a closed system, this balance could be supported from the outside environment.

about two weeks ago
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MIT Study Finds Fault With Mars One Colony Concept

Katatsumuri Re:To quote Sir Arthur Clarke... (269 comments)

Mars One does not claim that the current level of detail in their plan is sufficient. The problem is they are handwaving by saying "well, we will outsource the design". Perhaps it is good to push for more details by analyzing the currently available details like this. But while doing so, one necessarily makes a lot of assumptions, so it is unfair to present it as if the whole idea is proven unsustainable. And that is the impression people will get from articles like this. There must be a way for a more constructive discussion.

about two weeks ago
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MIT Study Finds Fault With Mars One Colony Concept

Katatsumuri Re:Practice colony in Antarctica first? (269 comments)

Great post. I would only like to emphasize that we don't have to build a 100% self-sustaining colony from the first launch, and that a Mars base is not a closed environment. So, two comforting factors:

1. Importing even only a few small key components (like CPUs or nuclear fuel) can cut a huge part of that tech tree you mentioned, until the local capabilities are improved.

2. We still have a whole huge planet there. It may not have all the same resources we have on Earth, so optimal technological processes may differ, but once you start leveraging local resources at large scale, some inputs may become really cheap and solve parts of your tech tree in other ways than it is currently done on Earth.

Learning how to solve this bootstrapping problem will be one of top benefits we get from this project.

about two weeks ago
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MIT Study Finds Fault With Mars One Colony Concept

Katatsumuri Re:Mars One is a TV-show (269 comments)

There's also hope that to keep the impression of working towards a real colony, they might sponsor some space-related research & development. And there is some value even in simply making the colonization idea more popular and raising discussion about it. Now, for example, whoever plans a Mars colony, will know he has to address some points mentioned in this MIT study.

about two weeks ago
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MIT Study Finds Fault With Mars One Colony Concept

Katatsumuri MIT, be constructive (269 comments)

Instead of wasting time and money on attacking straw men based on your assumptions, how about taking a part of the problem that you fully understand, and spending the same time and money on working out a solution?

Anyway, this might be a useful way to troll Mars One for adding more essence to their plans. Given that "the team is willing to update their analysis if more information becomes available", this could become a nice opportunity for Mars One if they use it wisely.

about two weeks ago
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MIT Study Finds Fault With Mars One Colony Concept

Katatsumuri To quote Sir Arthur Clarke... (269 comments)

"If an elderly but distinguished scientist says that something is possible, he is almost certainly right; but if he says that it is impossible, he is very probably wrong."

Granted, this study is supposedly more than a one man's rant, but I'm afraid that the room for assumptions is too big to guarantee an unbiased conclusion.

It is now Mars One team's move to provide a good rebuttal. So far, Bas Lansdorp's response is inadequate:

...while he welcomed the students' analysis, his company does not have time to respond to all the questions it receives from students and "the lack of time for support from us combined with their limited experience results in incorrect conclusions."

about two weeks ago
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One In Three Jobs Will Be Taken By Software Or Robots By 2025, Says Gartner

Katatsumuri Re:Yes yes yes (405 comments)

Indeed; a decent education for a web designer, for example, is hard to come by. People with CS and print design backgrounds are filling it. For mobile design it's even worse. The education system simply cannot keep up.

about two weeks ago
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One In Three Jobs Will Be Taken By Software Or Robots By 2025, Says Gartner

Katatsumuri Re:Mega Rant (405 comments)

You had me until the cruise ships and the international travel ban. Now I'm scratching my had about whether the rest of your post is just as groundless, and if I should review my own wishful thinking that prevented me from filtering it earlier.

about two weeks ago
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The Raid-Proof Hosting Technology Behind 'The Pirate Bay'

Katatsumuri They deserve praise (144 comments)

The Pirate Bay definitely deserves praise for staying up, despite being famous and constantly attacked by the media mafia. They bring hope that one day we may live in a world where sharing of knowledge, art and data is encouraged rather that prosecuted, and that some of today's files will survive until then, as well.

It will require a lot of work until we get there in the social realm (fighting the abusive law). It may help if technical solutions exist (decentralization, anonymity, security) that allow everyone to ignore the nonsensical law, to make the case even more obvious and to get by with our files in the meanwhile.

about a month ago
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Interviews: David Saltzberg Answers Your Questions About The Big Bang Theory

Katatsumuri Re:Too Bad (106 comments)

"We've had to come to recognize, accept and even to some extent celebrate neuro-diversity..."

They should put this in Sheldon's script! It is pure beauty!

about 1 month ago
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Information Theory Places New Limits On Origin of Life

Katatsumuri Re:Unusual in a huge system ... (211 comments)

Yes. More people should read "Elements of Style" and "On Writing Well".

about a month ago
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Astronomers Find What May Be the Closest Exoplanet So Far

Katatsumuri Re:Time to travel 11 light years (89 comments)

True. Finding interesting destinations and developing new propulsion methods are mutually complementary tasks. Both are important and can be done in parallel by people with different talents and interests.

about 1 month ago

Submissions

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Poll: When will new tech justify upgrading a modern quad-core home PC?

Katatsumuri Katatsumuri writes  |  about 9 months ago

Katatsumuri (1137173) writes "
  • Now!
  • In 1 year
  • In 2 years
  • In 3-4 years
  • In 5-9 years
  • In 10 years or more
  • 640K is enough for everybody!
"
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Anti-Aging Drug Tested On Humans Successfully

Katatsumuri Katatsumuri writes  |  more than 4 years ago

Katatsumuri (1137173) writes "Telomerase activator TA-65 has been tested on humans in Spain. It promises life extension and longer youth for everyone.

Quoting the press release: "The publication reports that TA-65 can cause telomerase, an enzyme that lengthens telomeres, to become active in human cells. Telomerase activation by TA-65 was shown to lengthen the shortest telomeres in humans, potentially extending human lifespan and healthspan. Telomerase activation is thought to be a keystone of future regenerative medicine and a necessary condition for clinical immortality. Although TA-65 is probably too weak to completely arrest the aging process, it is the first telomerase activator recognized as safe for human use."

See the press release and the original article preprint."

Link to Original Source
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Water on Asteroid Themis

Katatsumuri Katatsumuri writes  |  more than 4 years ago

Katatsumuri (1137173) writes "Scientists have detected water ice on the surface of an asteroid 24 Themis. The researchers say that ice is not stable in such circumstances and has to be being replenished by some means — perhaps from inside the object. With escape velocity of 87 m/s and water ice present, can this 200 km sized asteroid be a good target for a space mission?"
Link to Original Source
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Mapping the Fruit Fly Brain

Katatsumuri Katatsumuri writes  |  more than 4 years ago

Katatsumuri (1137173) writes "A new computer-based technique is exploring uncharted territory in the fruit fly brain with cell-by-cell detail that can be built into networks for a detailed look at how neurons work together. The research may ultimately lead to a complete master plan of the entire fly brain. Mapping the estimated 100,000 neurons in a fly brain, and seeing how they interact to control behavior, will be a powerful tool for figuring out how the billions of neurons in the human brain work."
Link to Original Source
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Lightweight $100 Notebook from Hong Kong

Katatsumuri Katatsumuri writes  |  more than 6 years ago

Katatsumuri (1137173) writes "Jointech has announced yet another $100 notebook. This one seems to literally cost $100. It weighs 680g and has a 7" display. Not much hardware to use with 64M RAM and 64M ROM, but you can add an SD memory card and USB devices. Designed for Windows CE — but how long until someone installs Linux on it? Will this be an Eee killer?"
Link to Original Source
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New small extrasolar planet may have water

Katatsumuri Katatsumuri writes  |  more than 6 years ago

Katatsumuri (1137173) writes "From press release:

"An international team of astronomers led by David Bennett of the University of Notre Dame has discovered an extra-solar planet of about three Earth masses orbiting a star with a mass so low that its core may not be massive enough to maintain nuclear reactions."

"The planet orbits its host star or brown dwarf with an orbital radius similar to that of Venus. But the host is likely to be between three thousand and 1 million times fainter than the Sun, so the top of the planet's atmosphere is likely to be colder than Pluto. However, the planet is likely to maintain a massive atmosphere that would allow warmer temperatures at lower altitudes. It is even possible that interior heating by radioactive decays would be sufficient to make the surface as warm as the Earth, but theory suggests that the surface may be completely covered by a very deep ocean."

See original report with links to scientific article and press release, or Space.com writeup."

Link to Original Source
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Ubuntu-like Brainstorm for others?

Katatsumuri Katatsumuri writes  |  more than 6 years ago

Katatsumuri (1137173) writes "Ubuntu Brainstorm has seen several improvements, and received a lot of positive feedback and contributions. It looks like a very successful representation of a public opinion poll.

What kind of company could possibly scale this up to let Internet users suggest ideas in a similar way to anyone they like, be it Google, Microsoft, or Cowboy Neal? My first thoughts were Google and Slashdot. Maybe some readers here can suggest other companies?

See also the Brainstorm entry for this idea."

Link to Original Source

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