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Comments

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Kids Can Swipe a Screen But Can't Use LEGOs

idji Re:Relevant Skills (352 comments)

15 years ago they were grumbling these kids couldn't run nor catch a ball. Horrors, what will they be saying in 2025?

3 days ago
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NASA To Send SpaceX Resupply Capsule To ISS Despite Technical Problems

idji Re:Open the pod bay door HAL (71 comments)

I just want to see the Falcon land!!!

5 days ago
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Crowd Wisdom Better At Predictions Than Top CIA Analysts

idji Re:Bell Curve (136 comments)

Laymen elect zealots, crackpots and "entrepreneurs" who are clearly lying to their fact for the Bread and Circuses

about a week ago
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Why Are We Made of Matter?

idji Re:Something From Nothing. (393 comments)

of course matter can pop out of nowhere - it happens all the time, see Virtual Particle. What is different here is the vast scale at which it happened, and where this phenomon applies to the origin of the Big Bang
Don't throw away a theory because you don't understand how it is started. The Big Bang Theory is simply stunning in it's ability to explain almost everything in the know universe that we observe. It is up to someone else to work out what may have triggered it.
This is just like Evolution which brilliantly explains almost everything we see in terms of life as it is. but evolution is not Abiogensis
When you understand that Evolution and Abogenesis are different things, as are sex and embryology, you will also understand how you mixed up the Big Bang Theory with another area of study which is about multiverses, unverse bubbles, oscillating universes, God's Poke, and other interesting ideas that are today all still in the realm of speculation - because we have no way yet of seeing which of them could be true.
Big Bang cosmologists work on what is observable and testable and predictable. Big Bang cosmologists are not expecting to find out how to create a big bang, but describe what happens after it occurs.

about two weeks ago
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USB Reversable Cable Images Emerge

idji Re:Voltage != Power (208 comments)

IAAP (I am a physicist).
There is nothing wrong with "5 volt power transfer". It is just saying that the power (whether 100mA or 100A) is always transferred at 5 volts, and not at 0.5 V or 50V. What is strange here is the "power transfer rate". Power= "energy transfer rate". "Power change rate" would make sense when talking about power ramp up, (i.e. how many milliseconds it needs to go from 100mA to 1A).
A Type-C cable with100W racing through it sounds like a fire hazard to me.

about two weeks ago
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If Ridesharing Is Banned, What About Ride-Trading?

idji Re:It Won't Work (353 comments)

The difference is that a taxi driver paid 30,000€ or more for his taxi license, and you paid nothing for yours. That's why they have this protectionist racket, because they are protecting their "investments".

about three weeks ago
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Million Jars of Peanut Butter Dumped In New Mexico Landfill

idji Landfill? (440 comments)

Why is this going to landfill - how backward is that? Who does landfill anymore? That stuff is full of oils and proteins. It could be turned into biodiesel or put into a furnace to generate heat and electricity.

about three weeks ago
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How Satellite Company Inmarsat Tracked Down MH370

idji Re:Little disturbing (491 comments)

The Malaysian government made the statement based on Inmarsat calculations, not on debris.

about a month ago
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Cisco Plans $1B Investment In Cloud

idji Re:Cures aids and cancer too (61 comments)

My company has employees in over 40 countries globally - 100 of us need to daily collaborate to build demo, download and upload virtual machines. A cloud provider gives us that for about 100,000k€/year and gives us servers in US, Europe and Asia. There is no way we could do that internally for 2 or 3 times that price. Cloud is a great solution for us - data loss, hacking, snooping etc are not issues because these are customer facing demo machines, and we download what we want.

about a month ago
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Flies That Do Calculus With Their Wings

idji Re:how calculus? (107 comments)

Calculus is summing lots of tiny inputs and making an output. Neurons sum a lot of tiny inputs and make an output.

about a month ago
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Physicists Test Symmetry Principle With an Antimatter Beam

idji Re:Feynman tutored me in QM at Caltech (106 comments)

Because your eyes are left and right of each other. Tilt your head 90 and try again.

about a month and a half ago
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Ask Slashdot: How Do You Manage Your Passwords?

idji Re:Keepass (445 comments)

I also use keypass+dropbox+iphone+Minikeepass.
Why is a keyfile an excellent option? If you only have 500,000 files on your computer (I bet you have less on your iphone), it can't take long to try them all - that is less secure than a 6 digit PIN, isn't it?
Or do you mean keyfile+passphrase? But isn't the effort to find the path of the keyfile more clicking/typing than an extra 6 digits??

about 2 months ago
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Google Buys UK AI Startup Deep Mind

idji Re:Voice assistant (113 comments)

That's what we said in the early 1990's when people were talking into mobile phones. Times change.

about 3 months ago
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Will Electric Cars and Solar Power Make Gasoline and Utilities Obsolete?

idji Re:Uh? (734 comments)

You are talking like a horse lover from the end of the 19th century who looked at cars and said "it'll never work - you cannot feed it".

about 3 months ago
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Rosetta Probe Awakens, Prepares To Chase Comet

idji The Path of Rosetta since launch (72 comments)

Here is a beautiful interactive 3D simulation of how Rosetta got to where it is now. Where is Rosetta?. Video
The choreography of the Earth, Mars, Earth, Earth slingshots is just amazing.
Here is the complex orbits to come of Rosetta around the comet Orbit around Comet

about 3 months ago
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Starbucks Phone App Stores Password Unencrypted

idji Re:When will companies be held liable? (137 comments)

Is there a genuinely secure mechanism for an app to store a password internally? I imagine they mostly just store an encrypted version of the password using a standard algorithm with an fixed "unknown" key/salt in the code. Isn't this just an example of security through obscurity?

about 3 months ago
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New Class of "Hypervelocity Stars" Discovered Escaping the Galaxy

idji Re:This makes me think more about the word "Speed" (150 comments)

This speed is still very fast if it is taken relative to us or to the galactic center. The galaxy's speed relative to the cluster plays no role at these sizes and time scales. "sitting idle-ish and the galaxy zipping past" is the classic Relativity - it makes no difference - both are identical. In either case something caused that Star's velocity relative to us to by very different.

about 3 months ago
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Australian Team Working On Engines Without Piston Rings

idji Re:Nice idea but... (368 comments)

You sound like the people in my grandmother's village in 1905 when the first car drove in - "It won't last - you can't feed it like you can a horse".

about 3 months ago
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US Coast Guard Ship To Attempt Rescue of 2 Icebreakers In Antarctica

idji Re:This whole incident... (382 comments)

go and look at Ozone depletion and see that the alarmism was worth it because the world did ban CFCs and the charts show the improvement since. What we need is global coordinated action on the issues of today
Icebreakers being stuck in ice doesn't say much about climate change - incidents of such icebreakers stuck in ice over many decades may say something. Don't confuse an incident with a trend
I am sure there are many stupid Americans in New England seeing how amazingly cold it is this week and mocking Climate Change. (I live in Central Europe and we have at the moment one of the hottest Januaries on record). Climate Change predicts weather extremes because there is more energy available in weather systems to push to hotter and colder extremes.
That thick ice in Antarctica could be an example of climate change if, for example, more ice is rolling off the land faster, or climate change has changed currents to push more ice into that bay. Only objective longterm observations can help here.
There are problems with Alarmism, but it was right with Acid Rain in the 1970s, leaded petrol and Ozone in the 80's - those problems were reversed - and the scientific community is in consensus that CO2 today is a far more serious issue and we need alarmism before we reach tipping points.
I would rather take action with alarmism, then do nothing out of cynicism while species go extinct and Africans and Bangladeshis try to emigrate in their millions.

about 3 months ago
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Bill Nye To Debate Creationist Museum Founder Ken Ham

idji Re:Dammit bill. You're smart enough to know.... (611 comments)

Ken Ham has been playing this game since at least the early 80's. He is not an idiot - he is just convinced that Genesis 1 is literally true and that all Genesis-deniers are deceived by the Devil and keeping people from following the one true Creator Jeezuz. This will not be a debate at all - they will both be ignoring each other's positions, digging into the sand and grandstanding - and Ham's organisation gets 25$ per attendee and millions of Youtube views and other media attention.
If Nye does well, then Ham's people will say that Satan is clever or that man's wisdom will be shown foolish at the Last Judgement and warn his followers to not follow the Serpent's smooth words, and that listening to these humanists will imperil your soul.
Ken Ham is an Evangelist with the mission of winning souls by "upholding the authority of the Bible from the very first verse". That is for him the only goal of this "Debate".

about 4 months ago

Submissions

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How did the Moon move so far in one day?

idji idji writes  |  more than 4 years ago

idji (984038) writes "Saturday morning I woke up at 7am and looked out my south-facing window (48N) and saw the moon BEHIND a tree. Sunday morning I woke up at 8am and looked out my south-facing window. No surprise that the Moon was there. But what blew me away was that the moon wasn't behind the tree, it was ABOVE the tree, about 8(!) moon-diameters higher in the sky. I have studied planetary science, the orbit of Mercury and can derive Kepler's 3 Laws from F=ma on the back of an envelope but I didn't have an explanation for what I saw — I skipped that observational Astronomy class at university — too much trigonometry. Orbit of the Moon didn't help me either. Can any one out there explain how the Moon was 8 diameters higher in the school AFTER 25 hours?"
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idji idji writes  |  more than 7 years ago

idji writes "Astronomers meeting in the Czech capital have voted to strip Pluto of its status as a planet. About 2,500 were in Prague for the International Astronomical Union's (IAU) general assembly. Pluto has now been demoted to a pluton — transneptunian — kuiper belt object — whatever you want to call it. http://news.bbc.co.uk/1/hi/world/5282440.stm"

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