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Comment: 5 steps method (Score 2) 3

by Cybernot (#37233846) Attached to: Math curriculum to understand General Relativity
In order, I think you should : 1-Make sure you are good with basic vector and matrix math 2-Make sure you are good with basic newtonian physics (mechanics, gravity, etc) 3-(optional but very helpful) become familiar with coordinate changes (from cartesian to spherical and others like cylindrical) 4- Learn special relativity before general relativity... I specify it because sometimes it is not obvious that special relativity is a prerequisite for the general relativity because the names may be misleading (http://en.wikipedia.org/wiki/Special_relativity) 5- Learn about tensor (http://en.wikipedia.org/wiki/Tensor) Now you can start reading about general relativity
Verizon

+ - Verizon USB551L Modem Does Not Support Linux->

Submitted by Anonymous Coward
An anonymous reader writes "Despite being advertised heavily as supporting Linux, Verizon's USB551L is not supported for individual users. Verizon Tech Support could not even say how/if it is supported for Enterprise users. It's a real shame, I really wanted a plug-n-play 4G modem for my laptop."
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Security

+ - Best password storage method 2

Submitted by WhoDatBe
WhoDatBe (876340) writes "I want to start using a password storage system. I (like everyone else, most likely) find myself using the same password over and over for sites all over the place. I have a few that I use that are more secure for work related stuff, but even then I find myself duplicating the same passwords. I would like to start using random passwords for everything, but that means having some means to safely store them. What do others in the SD community use for storing and tracking passwords?"
Politics

+ - How to Get Elected Without Being Corrupt? 1

Submitted by x_IamSpartacus_x
x_IamSpartacus_x (1232932) writes "I have a very close friend who is a local state representative. He has wanted to enter the world of politics since he was very young and has begun his journey as a state rep. He wants to change the culture of corruption, pursue open/honest government and adheres strictly to the constitution and the very real limits it places on the power he hopes to have. Without getting into corporate corruption, political favors to selfish companies, and making himself beholden to the rich, how does he fundraise to compete with the politicians who do? How does he get elected to higher office without corrupt and crooked politics?"

+ - Is Sugar Toxic?->

Submitted by a_hanso
a_hanso (1891616) writes "From the NY Times: On May 26, 2009, Robert Lustig gave a lecture called “Sugar: The Bitter Truth,” which was posted on YouTube the following July. Since then, it has been viewed well over 800,000 times, gaining new viewers at a rate of about 50,000 per month, fairly remarkable numbers for a 90-minute discussion of the nuances of fructose biochemistry and human physiology."
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+ - Educating Non-Techies on Database Practices?

Submitted by SpeedStreet
SpeedStreet (924467) writes "My company has several folks I would like to introduce to the finer points of relational databases and how to properly structure data. At most, one of them has experience writing reports in Crystal Reports.

I'm wondering if anyone can point me in the right direction to some really basic classes or other resources I could share with them."
Businesses

+ - Bank software bug being exploited?

Submitted by Anonymous Coward
An anonymous reader writes "My friend called last night and recounted a peculiar tale. For six months now there have been automated transfers happening to his checking account that "disappeared", yet he'd never authorized any automated payments, ever. He was puzzling over his discrepant account balance and went to his bank, engaging the fraud department to help him. He showed them that there were three currently pending transactions, two for $18.95 followed by one transaction where he was refunded $18.95. While they were looking at his account information all three transactions seemingly evaporated and the balance was now $18.95 less. The only proof the banker had that these transactions ever existed was that he had seen them himself. Puddling through archived data they were able to see that these triplet transactions had been ongoing for six months, but they didn't appear in any normal views of the account, they were only found by searching past records and specifically looking for them. The only information available from the records was an 800 number of a company my friend had never heard of.

The bank covered the losses and his money is moving to another account so he is, for the moment, okay.

So, it occurs to me that someone knows of a bug in the banks software. When two debit transactions and one credit transaction are done quickly the money is moved to and fro but the one 'refund' makes both charges fall off the monthly statement. This seems reminiscent of the "half cents" sort of scam, if these knotheads are dinging hundreds of accounts for petty amounts like this, they stand to rake in a ton. I assume that if the refund transaction happens quickly enough that the code sees it as some sort of merchant error and then goes to clear the whole transaction out, and in doing so it sweeps by merchant info and snags both earlier debits. The money actually moving out of the account seems to counter that logic, though.

I'm concerned that since the amount involved was chump change and the complaining customer has gone away, the bank is going to let this go and we will all remain vulnerable until it becomes so frequent that they can no longer ignore it. Naturally I've been nosing around the net looking for anything similar, but haven't encountered anything close to what my friend described. Does this sound familiar to anyone? Has anyone heard of a scam like this? You do reconcile your accounts reasonably frequently, I trust?"

+ - Fukushima vs bomb tests

Submitted by opencity
opencity (582224) writes "With TEPCO dumping water with low levels of radioactivity and a leak directly into the ocean I was wondering if the more knowledgeable could compare the current situation with the oceanic bomb tests over the years in terms of amount of radioactive material into the ocean. With the naive hope that the discussion won't devolve into nuclear pro/con flame wars."
Japan

+ - Nuclear Power Plants vs Coronal Mass Ejections

Submitted by Bones3D_mac
Bones3D_mac (324952) writes "Could a major coronal mass ejection from our Sun result in planet-wide nuclear disasters similar to what we witnessed in Japan? Not only could it cause the "station blackout" effect we initially heard about, but what about the potential for loss of communication lines and overall mass confusion as our usual electrical and electronic devices suddenly go dark on us for seemingly no reason whatsoever?"
Science

+ - Why Men Don't Have Spines on Their Penises-> 4

Submitted by sciencehabit
sciencehabit (1205606) writes "Most male mammals wield a penis covered with spines made of keratin, the same material that forms fingernails, to sweep out competitors' sperm and irritate a female into ovulating. Even chimpanzees, our closest relatives, have penile spines. So why don't men? A new study suggests that this feature disappeared due to a chunk of DNA that went missing after our evolutionary divergence from chimps. The researchers have identified another DNA deletion that may have contributed to humans' bigger brains."
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Facebook

+ - Does Facebook Violate RFC2142?-> 2

Submitted by
nuckfuts
nuckfuts writes "An e-mail sent to abuse@facebook.com resulted in an automated response saying:

Unfortunately, the email address you are using to reach us is no longer available. In order to best assist you, we have provided avenues of support for specific issues that are located in our Help Center. Please follow the link that best suits your problem.

All the provided links require logging in to Facebook. Since I don't have a Facebook account, it appears I cannot report abuse. Is this not a violation of RFC2142 ?"

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+ - Configuration through command line or UI? 2

Submitted by
i_ate_god
i_ate_god writes "Ask Slashdot: What do people here prefer, or what experiences have they had, when it comes to configuration of an application? Are people more comfortable using a user interface to configure an application or are they more comfortable using a command line to edit configuration files? Are there cases where one solution is better than another or should an application support both?"

If you aren't rich you should always look useful. -- Louis-Ferdinand Celine

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