Welcome to the Slashdot Beta site -- learn more here. Use the link in the footer or click here to return to the Classic version of Slashdot.

Thank you!

Before you choose to head back to the Classic look of the site, we'd appreciate it if you share your thoughts on the Beta; your feedback is what drives our ongoing development.

Beta is different and we value you taking the time to try it out. Please take a look at the changes we've made in Beta and  learn more about it. Thanks for reading, and for making the site better!



Tesla Removes Mileage Limits On Drive Unit Warranty Program

TomGreenhaw Quite a few??? (174 comments)

The Model S has only been available for a couple years. It's really hard to imagine that many people have driven a Model S more than 125,000 miles.

4 days ago

Man-Made "Dead Zone" In Gulf of Mexico the Size of Connecticut

TomGreenhaw Re:So? (184 comments)

Is it the nitrogen or the phosphorus? I think phosphorus is the big problem.

Here in the Chicago area, the water reclamation district has started using a new process to remove phosphorus from the sewage. Aside from the up front cost, its generating millions of dollars of valuable fertilizer. The phosphorus compound that's removed has the benefit of slow release and not water soluble but can be absorbed by roots. Farmers like it because they fertilizer lasts longer and doesn't run off right away.

I think this is a new process that is only in one treatment plant. Hopefully all treatment plants will embrace this to reduce or solve the dead zone problem.

about two weeks ago

Elon Musk Promises 100,000 Electric Cars Per Year

TomGreenhaw Re:Market will bubble will pop before then (122 comments)

We've had our Tesla for a year and a half. Its by far the best car we've ever had. When we park it at home we plug it in - it takes only seconds so its always got full range. It was expensive up front, but much cheaper to operate than our hybrid gas vehicle. It is extremely reliable. I will definitely buy another Tesla someday.

Other than the impracticality of a cross country drive, which we rarely do, what are the many limitations of an all electric car?

about three weeks ago

Elon Musk Promises 100,000 Electric Cars Per Year

TomGreenhaw Re:Market will bubble will pop before then (122 comments)

While I agree that Tesla stock is *cough* optimistically valued, they are a growth company that cannot be fairly compared to a mature value company like Ford or GM. I wouldn't be surprised at volatility but I think bubble is way too strong a term.

If they slashed their R&D budget as documented in TFA they could be profitable. I'd argue that their aggressive R&D spend predicts steep revenue growth over the next several years.

about three weeks ago

China Confirms New Generation of ICBM

TomGreenhaw Re:Angry Proliferation Game (224 comments)

Reminds of something we joked about years ago. It's like a couple of kids, knee deep in gasoline each with a pack of matches arguing over who has more matches. Now we have more kids with more matches...

about three weeks ago

Appeals Court Affirms Old Polaroid Patent Invalid

TomGreenhaw Re:Refund! (45 comments)

Then I think we agree. Most royalties paid to patent trolls are under threat of lawsuit.

about a month ago

Appeals Court Affirms Old Polaroid Patent Invalid

TomGreenhaw Refund! (45 comments)

If a "Patent Assertion Company" or "Non-Practicing Entity" is found to have collected royalties on an invalid patent, they should be required to return the royalties.

about a month ago

Nano-Pixels Hold Potential For Screens Far Denser Than Today's Best

TomGreenhaw Re:What's the point? (129 comments)

How about a super high resolution watch or phone that along with a pair of glasses that magnify the image to look like a big screen?

about a month ago

The Pentagon's $399 Billion Plane To Nowhere

TomGreenhaw Re:And Joe Schmoe wont care. (364 comments)

While your post is a bit off-topic, in essence its all about national defense.

You raise a lot of good questions.

Q) why should the US help arriving children?
A) Because we can. Isn't it right to keep children safe? That doesn't mean they get to stay here, but we want to treat them the way we wish our children would be treated.

Q) Why exactly do people expect the US to accept illegal immigrants?
A) Its hard to take someone "demanding that we accept illegal immigration" seriously. That said, we are a nation of immigrants. Deep down inside, most of us recognize the hypocrisy of denying immigration to those who want to live in the United States. Its obviously too hard for people to immigrate legally or they wouldn't risk their lives to come here. We should be flattered that people want to become Americans. There is plenty of room here for people who are willing to work and contribute at least as much as they take.

Q) If you're going to accept every person who shows up at the border, then why even have a country?
A) This is a very good question. Nationalism may be becoming obsolete. We are all human and basically want the same things. Technologies like air travel, the internet and global commerce are blurring boundaries.

about a month and a half ago

Physicists Spot Potential Source of 'Oh-My-God' Particles

TomGreenhaw Re:Alien Spacecraft (144 comments)

LOL - if you think their fastballs are energetic wait until you see their bats.

about a month and a half ago

Four Weeks Without Soap Or Shampoo

TomGreenhaw Why not Probiotic moisterizer? (250 comments)

Shower as usual to strip the skin of all microbes and then moisturize with a probiotic. Seems more logical to me.

I declare this idea to officially be in the public domain :-)

about 3 months ago

US Navy Wants Smart Robots With Morals, Ethics

TomGreenhaw My late father talked about this a lot (165 comments)

He devised a system he called "Utilitarian Dynamics"

He had a formula, V=DNT
V is value
D is degree; i.e how happy or unhappy somebody is
N is number; the number of people
T is time, how long they were affected

Morality is very tricky, but objective attempts to quantify and make optimal decisions cannot be a step in the wrong direction. Maybe well programmed machines will help improve human behavior.

about 3 months ago

Why Mobile Wallets Are Doomed

TomGreenhaw Re:WTF does it do for me? (272 comments)

Paying with a phone should be more secure. Card security is based on something you have, whereas a phone can also use bio-metrics as well as something you know. Most people will immediately know and report a lost/stolen phone too.

Finally, the opportunity to offer loyalty programs and discounts would attract many customers.

I'm surprised that Google and Apple haven't bought up large payments companies like Paypal and taken this over...

about 3 months ago

Wyoming Is First State To Reject Science Standards Over Climate Change

TomGreenhaw Re: Motivated rejection of science (661 comments)

This is an interesting exercise.

There are a few areas in your approach that I think account for our discrepancy.

The first and I think biggest flaw in the above calculation is assuming that heat energy in BTUs from petroleum with the 35% efficiency for ICE greatly overstates power efficiency of ICE vehicles. Only experimental engines get that as a maximum at an ideal load and RPM. In reality at the wheels a standard ICE vehicle gets less than half that at best - maybe 15%. This is a really hard number to pin down and why simply comparing energy usage per mile is less prone to calculation error.

Second (and you're absolutely right), I was only estimating personal transportation which accounts for about half of the petroleum used.

The third is that you are not considering the efficiency gains of an electric vehicle through regenerative braking, no idleing losses and the impact of no transmission as well as maximum efficiency at nearly all RPM. Electric cars on average use much less energy per mile.

The second and third points account for a factor of 8 - electric vehicles are about 4 times more efficient than gas vehicles on average and I was only addressing half the problem.

In any case we're definitely talking about less than 10 new nuclear power plants and probably much less.

I guess we have to give the envirowackos a choice between a possible problem with nukes vs. a for sure problem with fossil fuels. Just because its not easy or obvious shouldn't cause us not to try.

about 3 months ago

Wyoming Is First State To Reject Science Standards Over Climate Change

TomGreenhaw Re: Motivated rejection of science (661 comments)

The amount of power electric cars use is not that much. We might need to build a few more power plants and the current distribution grid can handle it with reasonable upkeep.

Check my math:
0.4 kwh/mile This is what we get with our Tesla. Most people get better mileage but I live in a climate that causes poor economy.
0.470588235 kwh/mile Adjusted 85% for charging loss
2.125 miles per kwh This is much cheaper than gas by the way
24.8 average new car mpg average fuel economy
365 million gallons of gas per day consumed in the US
14717741.94 miles driven per day in US
613239.2473 miles driven per hour in US
1635304.659 kwh per hour electric car equivalent

14.3 billion kwh per year electric car equivalent - this is an estimate of how much electricity we would use if all cars were Teslas

11.8 billion kwh per year - average nuclear power plant generates this

about 3 months ago

Wyoming Is First State To Reject Science Standards Over Climate Change

TomGreenhaw Re: Motivated rejection of science (661 comments)

It's here in laymen's terms from the National Academy of Science:

1) Who needs a computer model when you can see the polar ice melting. Yes, its really melting - go see it for yourself it you don't believe it. Strike up a friendship with somebody in Iceland if you disagree and ask them what they are seeing.
2) Who cares, the house is on fire. Let's not waste time arguing about how it got started.
3) We only have one earth so there will be no control group or second chance. You don't need to be a medical doctor to know that a self inflicted gunshot wound is a bad idea. You don't need to be a climate scientist to see that the global climate is changing and that the logical explanation is mankind's burning of fossil fuel. The time for skepticism has passed.
4) The data has been readily available and its being ignored. Our innocent descendants need to be protected from the selfishness of our generation and the previous two or three. Even if global warming is a hoax, is it fair that our generation uses more than its fair share of the planet's resources so a few super rich multinational corporations can get super richer?
5-9) See #2

The vast majority of free thinkers who have reviewed the data agree that man is having an unprecedented impact on the atmosphere and the ocean. For better or worse we are reshaping the climate and there will winners and losers. The losers are innocent people and wildlife who cannot adapt to the changes and our descendants left with a planet stripped of its resources.

If we want to be selfish and immoral - fine - let's just don't be a hypocrites about it. As we all pump gas into our cars and adjust our thermostats we should recognize there are consequences of our actions.

about 3 months ago

Did the Ignition Key Just Die?

TomGreenhaw Re:Obligatory Tesla Plug (865 comments)

A would be car jacker or thief would be ill advised to steal a car that is always connected to the internet and whose location is shown on a google map in real time on a mobile phone (also a standard Tesla feature).

about 3 months ago

Anti-Virus Is Dead (But Still Makes Money) Says Symantec

TomGreenhaw Re:No explanation for why though? (254 comments)

Because some of these companies have discovered that they can sell products that don't work and still make a boatload of money. Declaring AV dead as an excuse to avoid investment in security threat mitigation technology and still sell the product that doesn't work is basically fraud as far as I'm concerned.

We have switched to Sophos which seems to be doing the job. I'd be very interested in hearing opinions of which AV products aren't dead.

about 3 months ago


TomGreenhaw hasn't submitted any stories.


TomGreenhaw has no journal entries.

Slashdot Login

Need an Account?

Forgot your password?

Submission Text Formatting Tips

We support a small subset of HTML, namely these tags:

  • b
  • i
  • p
  • br
  • a
  • ol
  • ul
  • li
  • dl
  • dt
  • dd
  • em
  • strong
  • tt
  • blockquote
  • div
  • quote
  • ecode

"ecode" can be used for code snippets, for example:

<ecode>    while(1) { do_something(); } </ecode>