Catch up on stories from the past week (and beyond) at the Slashdot story archive

 



Forgot your password?
typodupeerror
×

Comment Go back, start over. Way back. (Score 1) 221

He does need to apply a little math there. Dragging a net behind might happen due to (weak) atmospheric friction, but you're not going to sneak up behind debris and gently catch it in the net. Something in a lower orbit is moving faster relative to you, so the debris will come from 'behind'.

Also, you're going to be waving a huge net around and hope to only get close enough to things that are traveling at speeds which are only slightly different. Somehow you have to not catch working equipment, and not get smacked by something in a path at 90 or 180 degrees. That's worse than praying for a magical 18,000 carom path.

When you do catch something, it's not going hit right in the center of gravity so your whole contraption goes spinning. The first time that happens, your net might close around what might be in it. But it won't stop without a lot of fuel. And if you don't stop it yet somehow manage to intercept something else the something else will hit the outside of your net purse and send it spinning in another direction. If you do stop the spinning and reopen the net, the movement of opening will push your catch out and away.

That's assuming you can actually catch anything. It's more likely that you'll blunder into the path of things moving in the wrong direction. Then the debris will be increased by bits of stuff that got hit, followed shortly by whatever is torn off by the stresses of the net trying to head off in another direction (assuming your net got hit and not your garbage trawler).

Go look up the designs which others have done. Nets which are intended to vaporize or slow debris, electromagnetic drives, including deorbiters on new satellites.

And, no, don't think Quark. Think Planetes.

Comment Overly ambitious (Score 3, Interesting) 118

That's how a rover which was designed to be cheap and lightweight would have become a multiton semi-mobile laboratory. Adding on accessories and desirable features, then stronger equipment to carry it all, is how much larger and more expensive space probes are created. Problems with such designs caused smaller and simpler designs to be favored. But... why aren't there six more of these things wandering around by now?

Submission + - Killer Sue Wikipedia To Remove Their Names (nytimes.com) 2

Jason Levine writes: Wolfgang Werlé and Manfred Lauber killed a German actor in 1990. Now that they are out of prison, German law states that they can't be referred to by name in relation to the killings. Therefore, they have sued to get Wikipedia to remove their names from the Wikipedia article about the killings. The German edition of Wikipedia has already complied, but the English edition is citing US freedom of speech and a lack of presence in Germany as reasons why they don't need to remove the name. In a bit of irony, their lawyer e-mailed the NY Times: “In the spirit of this discussion, I trust that you will not mention my clients’ names in your article."
The Military

Submission + - Two Sunken Japanese Submarines Found off Hawaii

Ponca City, We love you writes: "The NY Times reports that two World War II Japanese submarines, including one meant to carry aircraft for attacks on American cities, have been found in deep water off Hawaii where they were sunk in 1946. Specifically designed for a stealth attack on the US East Coast — perhaps targeting Washington, DC. and New York City — the "samurai subs" were fast, far-ranging, and some carried folding-wing aircraft. Five Japanese submarines were captured by American forces at the end of the war and taken to Pearl Harbor for study then towed to sea and torpedoed, probably to avoid having to share any of their technology with the Russian military. One of the Japanese craft, the I-201, was covered with a rubberized coating on the hull, an innovation intended to make it less apparent to sonar or radar and was capable of speeds of about 20 knots while submerged, making it among the fastest diesel submarines ever made while the other, the I-14, much larger and slower, was designed to carry two small planes, Aichi M6A Seirans that could be brought onto the deck and launched by a catapult. The submarines were meant to threaten the United States directly, but none of the attacks occurred because the subs were developed too late in the war, and American intelligence was too good. "It's very moving to see objects like this underwater," says Hans Van Tilburg of the National Oceanic and Atmospheric Administration, "because it's a very peaceful environment, but these subs were designed for aggression.""
Google

Submission + - Google to Acquire AdMob for $750M (admob.com)

WhiteFoxBR writes: Google is planning to adquire AdMob, a mobile advertising company, for $750M according to a statement in the company`s website. AdMob provides ads for several mobile devices, although right now most of the traffic is generated by Apple devices. The value is almost half of what Google paid for Youtube three years ago, is the mobile industry the new bubble?

Comment in all honesty..... however mistaken (Score 1) 167

They may have copied it. But it wouldn't be the first time. A dirty, dark secret of Google's is that their main product, a search engine was a copy of AltaVista, which also had the dirty secret of being a copy of Aliweb.

Except that Google used content searching and information about links, while AltaVista used full-word content searching with many spiders, while Aliweb avoided spiders and used indexed descriptions rather than content. So other than being different, they were copies?

Comment Humans and devices (Score 1) 301

I assume you're providing the public web service, internal network services, and the product operation (irrigation management) services. So provide a summary of those three fields.

The executive-level statistics for the public web service will be easy to choose: How good is the service and when is improvement necessary? As will the internal services... summarize the measurable bottlenecks, including network disk space usage. Provide a number (or rescale it to a 0-10 rating) and a sentence which explains its meaning and/or how to interpret it ("Smaller is better, and the goal is less than 1 second per request.")

For the irrigation management service, because that is in almost direct support of the customers, you should learn how the process works from the customer's point of view (Are my sprinklers working? How much am I saving?) and from the company's point of view (server capacity, money saved by average customer, estimate of customers unable to connect to server, server requirements per customer). Some of the info may be of interest to different departments: IT, Irrigation Maintenance, Design, Sales, or Accounting. Then see what you can measure and decide what to report... and what to request in order to add more information.

Submission + - What use old TiVO hardware?

buss_error writes: "I have old TiVO hardware that I'd like to reuse — however, I find in searching that the most frequent reply is "Don't cheat TiVO!"
I don't want to cheat TiVO — In fact, I'd like to nuke the drive with a completely open source distro with no TiVO drivers at all.
Some uses I'd find interesting:

A PVR for security cams
A PVR for a drive cam
A unit for weather reporting
FAX/Telephone
Power monitor for the home
Other home automation

Again — I would prefer a completely TiVO free install — this is because I have major issues with TiVO and don't want the slightest
taint if their intellectual property. But since I paid for the hardware, I'd like to wring some use of it rather than simply put it in the landfill.
I won't give it away for some other person to experience my issues with TiVO — I'll throw it away before I'd do that."

Submission + - Best open source asset tracking solution?

Waynelson writes: I've been dealing with terrible commercial closed source asset tracking systems within the military for a while now and just recently i've been given permission to migrate to a new system if we can find something that works. We're looking for an asset tracking program that support taking regular inventories using unique asset ids that are scanned via a hand held device into a flat .csv file. What have you used and would you recommend it?

Slashdot Top Deals

"Luke, I'm yer father, eh. Come over to the dark side, you hoser." -- Dave Thomas, "Strange Brew"

Working...