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!



Power Grids: The Huge Battery Market You Never Knew Existed

randallman Re:flywheel (217 comments)

While the cost of pumped storage is not going to change, battery costs can and likely will come down. One example would cost about $30,000 per MWh, 1/6 or less of current tech. That's $30 million per GWh, almost 10 times cheaper than pumped storage.

I know battery breakthrough stories are a dime a dozen, but progress in this area is quite likely since you don't have the power density constraint of small devices. The primary driver is material cost, not power density. The amount of energy stored is arbitrary as these batteries consist of components which can be individually adjusted (e.g. use larger tanks for liquids).

10 hours ago

Low-Carb Diet Trumps Low-Fat Diet In Major New Study

randallman Lean Muscle Mass (411 comments)

The low(er) carbohydrate group had more muscle, which translates into a higher metabolism. They also, by nature of the diet, avoided highly processed foods.

The high-fat group followed something of a modified Atkins diet. They were told to eat mostly protein and fat, and to choose foods with primarily unsaturated fats, like fish, olive oil and nuts. But they were allowed to eat foods higher in saturated fat as well, including cheese and red meat.

The low-fat group included more grains, cereals and starches in their diet. They reduced their total fat intake to less than 30 percent of their daily calories, which is in line with the federal governmentÃ(TM)s dietary guidelines.

The low carbohydrate group ate more protein, which is essential to maintaining muscle. Also, knocking out "cereals and starches" probably knocked out highly processed grains and sugars. I think it's not so much what they're eating but what they're NOT eating: highly processed CRAP.

Lookup Clarence Bass. The guy looks GREAT at 75 and has maintained (and written about) a moderate diet and exercise plan since 40. I'm nearly 40. I love being active. I've competed in many sports including soccer, football, track and bodybuilding. I still have a good metabolism, good muscle mass and low body fat. Through variations of my diet I've found that a moderate diet including unprocessed or minimally-processed and uncooked foods is the best diet for me. Whole milk, nuts, avocados, fruits, brown rice, beans, salmon, lean beef or turkey, steamed broccoli, etc. A low carbohydrate diet makes me weak. I can't muster the explosive energy for an intense exercise session while carbohydrate depleted. When in ketosis (completely carb depleted), my breath smells like alcohol, my joints ache, I'm irritable and generally feel like crap. Maybe I'm different. My favorite pre-workout meal is a bowl of rice about an hour before. Carbs are fine. Just not the super-processed stuff.

11 hours ago

Python Bumps Off Java As Top Learning Language

randallman Great, an entire generation that won't... (415 comments)

So who hired the devs who "couldn't figure-out how to use {} in JavaScript" ??? I would fire that guy too.

about 2 months ago

New Chemical Process Could Make Ammonia a Practical Car Fuel

randallman Re:Now I'm confused ... (380 comments)

Thanks. Nice explanation.

about 2 months ago

NYC Loses Appeal To Ban Large Sugary Drinks

randallman Re:Not about consumption, but about sales (532 comments)

Bacon Clubhouse Burger (720) + Large Fries (510) + Large Coke (280) + Apple Pie (250)

I'd say that's a typical McDonald's order.

1760 Calories

about 2 months ago

Toyota's Fuel Cell Car To Launch In Japan Next March

randallman Re:Nice to see. (216 comments)

How about one that's not a piece of shit?

about 2 months ago

Toyota's Fuel Cell Car To Launch In Japan Next March

randallman Re:This is the final nail in the coffin of Fuel Ce (216 comments)

According to Honda's website, the Clarity has a range of 240 miles, less than Tesla's EPA range of 265. Definitely not costs seeing as how the hydrogen costs more than gasoline. But you do have fueling time, assuming you can find a hydrogen fueling station.

about 2 months ago

FAA Bans Delivering Packages With Drones

randallman Safe Routes (199 comments)

As a compromise, the regulators should approve routes that avoid populated areas. This would minimize risks in the event of a crash. Also they may need some sort of traffic monitoring and control infrastructure to handle multiple companies performing deliveries.

about 2 months ago

Are US Hybrid Sales Peaking Already?

randallman Re:Why would I buy a Prius (377 comments)

Most car enthusiasts get a manual in a sports car for control, not "engagement". Triptronic is just the old style automatic with options to "slowly" select gears. This is not the same as Porche's PDK and the likes.

If you've payed attention, all the high end sports cars are going to automatics in the form of "automated manuals" such as Porche's PDK. They're superior to traditional manual transmissions in all ways. Shifts in these advanced transmissions happen in about a tenth of a second. I've driven a Porche Panamera and a Mclaren MP4-C and had no want for a "stick shift" in either one. I think some Lamborghini and Ferraris don't even offer stick shifts any more.

As for noise, that's just baseball cards in the spokes. If see Mustangs and Pickups making lots of noise while hardly accelerating. And as a tech, you should know that sound is wasted energy. I'm over it. Give me instant torque all the time and great handling. That's the real fun.

about 3 months ago

One Developer's Experience With Real Life Bitrot Under HFS+

randallman Single Disk Parity (396 comments)

Does any file systems support single disc parity?

Set a parity ratio depending on risk vs. space loss tolerance. Say it is 1000. You can lose any of 1000 bytes in a parity group and recover while only giving up .1% of your disk space to parity.

about 3 months ago

Future of Cars: Hydrogen Fuel Cells, Or Electric?

randallman Re:Neither of the above, it will be CNG (659 comments)

The only production CNG vehicle in the U.S. is the Honda Civic GX, which has a range of 250 miles, 200 miles less than its gasoline counterparts. It also has a $10,000 premium price tag at $29,000. And as for fueling at home, Honda recommends against it to fuel quality concerns and will void your warranty if you do. That means we need an entirely new fuel infrastructure.

So we roll out CNG fueling stations. Maybe doable in 10-15 years. Then what happens when we run out of NG? We have 11 years ( of proven reserves and 100 years of "postulated" reserves. I'll bet those numbers drop quickly when we switch out gasoline for CNG. On the other hand, electrified vehicles are immune to fuel changes so our investment in infrastructure has 0 risk.

about 4 months ago

Future of Cars: Hydrogen Fuel Cells, Or Electric?

randallman Re:Electric. (659 comments)

A large part of that energy you are counting comes from oxygen in the air, not the gasoline. A fair comparison would be to lithium-air, which has 5-10x the energy density of standard Li-Ion.

about 4 months ago

Mercedes Pooh-Poohs Tesla, Says It Has "Limited Potential"

randallman Re:Switching from Mercedes to Tesla after $12K bil (360 comments)

More points for Tesla. Even with Mercedes perpaid service (you don't think it's actually free?), who wants to spend a Saturday or take off of work to sit in a dealership every 5000 miles? No thanks.

about 4 months ago

UN: Renewables, Nuclear Must Triple To Save Climate

randallman Re:Nuclear? (433 comments)

"When are you environmentalist nuts start studying how the electrical grid actually works instead of having fantasies about how it should work."

While a agree with your sentiment about anit-nuke positions, I think your "study the grid" viewpoint is narrow-minded.

Power demand (and thus supply) fluctuates greatly throughout the day. I'm an M.E. I worked for FPL, who know runs three solar power plants. I know how the grid works and it's sad that we still have to match production to demand. Energy storage systems are long overdue. There are some in place including uphill reservoirs, flywheels and thermal salt storage, but we haven't arrived yet. Though I'm not sure if centralized or decentralized (panels on houses) is best, it's clear that grid storage is a necessary step that will enable much needed flexibility on our power grid.

Grid storage is no more a "fantasy" than splitting atoms. I personally like nuclear. And I like wind and solar. And geothermal. They could work together nicely as base plus spike production. After we move to grid storage and look back, our current system of ramp production to meet demand will seem ridiculous and truly ancient.

about 5 months ago

Meet the Diehards Who Refuse To Move On From Windows XP

randallman Re:Hardware requirements (641 comments)

XP has been used as an embedded system on some large format scanners, printers, lab machines and other specialized hardware where I work. Other machines such as digital copiers have their own OS providing services such as SMB, FTP and other network services. Do you think these other OS's are somehow inherently secure and free of security holes? Why require embedded XP to have current updates and not the other embedded OS systems?

about 5 months ago

Australia May 'Pause' Trades To Tackle High-Frequency Trading

randallman Add Delay (342 comments)

They could switch the trade system to .NET. As London discovered, delay functionality is already built in.

about 5 months ago

The Problem With Congress's Scientific Illiterates

randallman Re:Don't bother. (509 comments)

Or get people in office who do care about the next century and beyond.

about 5 months ago

Prototype Volvo Flywheel Tech Uses Car's Wasted Brake Energy

randallman Re:mass in motion (262 comments)

Flywheels used today for industrial power storage are typically low mass - high strength. They're usually spun at very high rates in a vacuum on magnetic bearings. At 60,000 RPM I doubt the mass is an issue. Probably weights less than your lead acid battery.

about 5 months ago

Mt. Gox Gone? Apparent Theft Shakes Bitcoin World

randallman Home Page (695 comments)

Their homepage just contains the comment in html:

        put announce for mtgox acq here

about 6 months ago



Microsoft Windows for ARM

randallman randallman writes  |  more than 3 years ago

randallman (605329) writes "According to this article an article on, Microsoft will be presenting an ARM version of Windows. "The new product will debut at the Consumer Electronics Show in January, said the people, who asked not to be identified because Microsoft's plans are confidential. The software would be tailored for battery-powered devices, such as tablet computers and other handhelds, the people said." Will Windows on ARM be able to compete with iOS, Andriod and the other operating systems already in the ARM handlheld market?"
Link to Original Source


randallman 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>