Follow Slashdot blog updates by subscribing to our blog RSS feed


Forgot your password?

Comment Re:No way! (Score 1) 257 257

As far as I know XP-64 bit had the same EOL as XP-32 bit, even though it was "based" on Server 2003.

Microsoft continues to develop security patches for XP, but only users that pay for them get them (users, like government agencies handing over trainloads of money). My understanding those users must also have migration plans.

Other XP users that get security updates are embedded users.

Windows Embedded 2009 is based on Windows XP, and will get updates until 2019. Some XP users are changing registry entries to make Windows update "think" they are running "Windows Embedded POSReady 2009" which is an XP embedded product that will get updates till 2019, and uses the same Windows update program as standard consumer Windows XP.

On the Windows 98SE updates, as I recall there's some sort of screwup where it won't update at first. I think you need to install IE 6.0 or something, then it will pull all the updates.

Comment Re:Why not both? (Score 1) 231 231

For fractional horsepower motors there's no cost-benefit to doing sophisticated controls in most cases. You just need it to turn on and off at one, sometimes two or three speeds and the load is more or less constant. I wouldn't expect that to change any time soon.

For which the shaded pole induction, capacitor start induction, series wound "Universal motors" do a great job. Especially equipment that runs for long periods, induction motors will run years without maintenance (like motors in fridges)

In the industrial setting, aside from a process that needs to vary speed during cycle / between qualities, efficiency gains from VFDs (on fans and pumps), usually means that the system wasn't properly speced out (when they're used for example, to run the same machine at 50% speed continuously). Across-the-line starter for an induction motor is always more efficient than a VFD running the same machine at the same speed. Change the gear ratio, change the motor rating, and you will get more efficiency out than installing a VFD.

VFDs are something like 97% efficent. It's incredible the waste heat that comes off a 2000HP VFD vs an across-the-line starter for the same application. Plus the VFD is higher maintenance than the starter.

Comment Re:Truck Stops, Gas Stations, etc (Score 1) 859 859

Interesting. I live in the "We don't trust you to pump your own gas" state, otherwise known as New Jersey, and I've never seen the attendant have to go inside to get my receipt. But I'm sure that's just a coincidence.

Most receipt paper has a green, pink, or some other stripe or mark all over the paper as it's getting low. Cashiers recognize the pattern and will swap rolls before completely running out. Customers being a combination of lazy and stupid will ignore it, grab their receipt and leave. Given that the full serve attendants are effectively cashiers, they probably recognize this and swap rolls before running out. I can't explain the other poster's claim that the friend behind them got a receipt.

I could be giving the attendants too much credit though. Any time I'm forced to go to one, they keep "topping up" the tank to even dollar amounts. WTF? I'm paying with a credit card, I don't care if it's $57.83. Besides, it's bad for the evaporative emissions system to flood it with raw gas. That and I'm usually left waiting at the end of the transaction as they go tend to other cars. I'm glad I'm paying for such "professional service" from someone half my age.

Comment Re:Truck Stops, Gas Stations, etc (Score 1) 859 859

Current charge times make "recharge when the driver stops for breaks" impossible.

Of course they don't. You don't have to charge an EV from empty to full every time any more than you have to wait for an ICE vehicle to go empty then fill the tank to the top. With an EV the thing is to top it up at every opportunity. The batteries won't be empty, and you don't have to wait till they are full.

My quick check of Google shows that while the $85,000 Tesla has a 240 mile range, most cars are 90 miles. That's an hour and a half on the freeway and you're completely out of juice. While you don't have to wait for an ICE car to be empty, it only takes a couple minutes to fill from 50 miles remaining to 450. For commuting electric cars are great. Very efficient in stop and go, and yes you can top up everywhere you stop (if they have a charger). However the range, and time to charge does put a big damper on long distance trips. Tesla is trying to address this (with over 2.5x the normal range, and Supercharger stations), hopefully it filters down to all models, but right now Tesla is priced out of reach of most consumers.

Comment Re:quickly to be followed by self-driving cars (Score 1) 859 859

A lot can depend on individual circumstances, and the market. I live in an economically depressed area and rent. I'm glad I do.

One guy I know bought his house for $185k and sold it 4 years later for $165k (after being on the market 8 months). Another guy bought his house 5 years ago for $103k, and has had it on the market for 4 months at $100k. If I get a new job and move, I just have to give 30 days notice. The above people will also lose out on commission and closing costs.

I don't have any kids, and can live in an apartment for much cheaper than buying a house, and condos don't exist in this market.

Buying a house is great if you *want* to buy a house, but it shouldn't be bought primarily as an investment. The amount lost to interest alone is scandalous.

Comment Re:Why not both? (Score 1) 231 231

What do we standardize on? 3 Phase 120V is 208V. Most American industrial is 480V 3-phase. Canada industrial is 600V 3-phase.

The DC bus for these drives run at a nominal 295, 679, 849 VDC respectively.

Plus you still have a lot of control equipment (relays, contactors, etc) running at 120VAC single phase.

There is already so much established equipment completely replacing the grid would be almost impossible.

Comment Re:Why not both? (Score 1) 231 231

So called Brushless DC motors are actually permanent magnet rotor, synchronous AC motors?

I haven't seen a large change in small 1 phase motors. Most are still:
-Shaded pole induction motor for small fans
-Capacitor start induction motor for air conditioners, fridges, etc.
-Series wound "Universal motors" (that are basically a brushed DC motor) for intermittent high torque loads (vacuums, blenders, hair dryers).

Comment Re:No way! (Score 1) 257 257

Win2k3 EOL'd on 7/14/2015.

Even after the product is end of life, you can continue to get all updates that were released off of Microsoft's site / Windows update, just no new updates are released. You can even do a fresh install of Windows 98 and get all the updates that were released for it.

Comment Re:DC power (Score 2) 231 231

Even when they take DC, a lot of them are different voltages. Phone / USB chargers are 5V. Things like Laptops will be ~20V. So you will still have conversions. And the power going around, 120V or 240V, allows you to run moderate sized appliances without ridiculously thick cables. High voltage, low current, rather than low voltage, high current.

Often statistics are used as a drunken man uses lampposts -- for support rather than illumination.