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User: willy_me

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  1. You don't lose 10% on Superconducting Cables To Carry Power In Detroit · · Score: 3
    Sorry, but you don't lose 10% of power due to resistive losses - not even close.

    First of all, most of the losses are due to inductance, not resistance (this assumes you're using HV lines - 500kV is typical.) And at 500kV there isn't that much current flowing. 50MWatts just requires 100Amps - very reasonable.

    I wish I still had my college books, I could tell you exactly what the losses would be. (I graduated in power systems electronics - this is what we did.) Unfortunately I don't - but I assure you that resistive losses are not the main source of loss from a high voltage power distribution system.

    Willy

  2. Supercoductors won't help that much with AC on Superconducting Cables To Carry Power In Detroit · · Score: 3
    When you have power distribution lines running at 500kV, there isn't that much loss due to resistance. The majority of the loss is due to inductance. In order to really benefit from the superconductor they will have to convert AC to DC, transmit in DC, then convert back to AC before being delivered to customers.

    Going from AC to DC then back to AC isn't the most efficient way of doing things. It is however still done. For example, power is distributed from the mainland to Vancouver island via underwater DC power lines. I believe DC is used here because of the increased effect of inductance with the lines going under salt water.

    Using superconducters is great, really, it is... But just because there is basically zero resistance in those superconducters it doesn't mean that all of our problems will be solved. Line losses due to resistance aren't the main loss when it comes to distributing power. There are also losses with the generators, transformers, AC/DC/AC converters and most importandly - inductance. It's a start, not a solution...

    Willy

  3. Re:GUI at a lower level on Are Unix GUIs All Wrong? · · Score: 1
    As a Mac fan, I must say that you're right on some points. The Mac does treat everyone as an idiot. However, I seriously doubt people who develop for the Mac despise it.

    Having said that, I must say that I'm impressed with OSX. The GUI is different from pre OSX but it's still very easy to use. In addition to this, you get a terminal. Oh yes, just about anything that can be done on Linux can be done on OSX. The March 24th release of OSX will finally turn the Mac into something that people who read /. can respect. (That being a Unix based OS...)

    Willy

  4. Re:How I think this will all work out... on Record HDTV To A FireWire DV Deck · · Score: 1
    Oh, and yes, Firewire would work perfectly well in place of USB, although USB is cheaper and should do the job fine I feel.

    Sorry, USB won't work. Well I guess it could work if you had a PC tured on and managing all the data - but that would really suck. The big difference between USB and 1394 is that 1394 is a P2P design where every device is a peer. If you stick your DVD in your DVD player the data goes direct from the player to your console (or TV or whatever is using the data.) With USB the data would go to the PC then back out to the target device. In effect, your PC must be turned on and the data gets sent twice over the data lines. That 480Mbit theoretical speed just dropped to 240Mbit.

    USB and 1394 are different beasts suited for different uses. USB is great for PC periferals because you are guaranteed to have the controlling PC present. It's also lower cost which is good. 1394 is perfect for those devices that need to work without a PC. Would it not be great to take a digital camera, plug it into a printer and print your pictures by pressing a button on the camera - no PC required? Well you might not think so but those people out there that hate computers and just want it to work would probably love this. 1394 is great and perfectly suited for such applications.

    Willy

  5. Re:HDminiDV? on Record HDTV To A FireWire DV Deck · · Score: 1
    I agree. But I think it'll be more then a year or two before PCs can encode at real-time. The latest G4 from Apple claims to encode at 50% real time. I know running at 733MHz is nothing compared to a 1.5GHz P4 but that G4 has a built in DSP. Altivec screams and this is one of the few things it can really do well. I seriously doubt a P4 (or Athlon) could match a G4 for encoding video streams. (Mind you, they would be faster for just about everything else.)

    I suspect it'll be another 4-5 years before your typical PC can encode a video stream in real-time.

    Just to clarify a couple things.... That's MPEG2 encoding without using variable bit rates. Once VBR is used - that 50% real time goes down significantly.

    Willy

  6. Re:I disagree - It can be done... on Speeding To Become Impossible In UK? · · Score: 1
    There are also significant geography issues--because your vehicle would have to know which 4 km square to download next.

    For the downloading issue, I just assumed it would download all 8 surrounding maps at the same time. Feasable since they're using different frequencies. When moving to a differnent "map", they would simply discard the useless data and start downloading any additional new maps it might need.

    (In fact, you wouldn't download 4 km squares--you'd download .2 or .25-degree squares. GIS generally doesn't do miles or kilometers.)

    I don't see how this is relevant. The "maps" wouldn't be connected to the the GPS data in any way. It's the on-board computer that would decide what map was required and what maps would need to be dowloaded. It just gets the position from GPS.

    In fact, the data in any given 4 km area is substantially more complex than a vector and a few arcs. So there are significant bandwidth issues

    You wouldn't have to send a complete map. Just the roads. Take a AutoCAD drawing of a 4 square km section of a city. Take out everything except the roads. Now reduce the roads so they're represented by a single line. I seriously doubt that file would be that big. Probably under 25kBytes.

    And once again--you'd have to absolutely, positively guarantee, regardless of wind, weather, or atmospheric disturbance, that the data transfer happened in time. Or you could be sending cars at 100 kmph hurtling into an interchange whose speed limit was just reduced to 40 kmph.

    OK, this system would just limit the speed. The worst thing that could happen is that people on a freeway would have to slow down to 30km/hour. If they're smart, (and I'm sure they are), if any connection errors or anything like that were to occur - the system releases full control to the driver. This is a good thing. All one would have to do is cut the antenna going into the system to disable it. ;)

    Willy

  7. I disagree - It can be done... on Speeding To Become Impossible In UK? · · Score: 2
    If small road side trasmitters were setup to provide the local "map + speed limits" it could work. You wouldn't need 37 CDs in the car. The signal could simply be broadcasted to all cars. It would just have to be fast enough so that your car has enough time to download the entire map before it enters that area.

    Think of it this way, say a local map section was 4 square km. Your trasmitter would then transmit over a 16 square km area (numbers pulled out of my head.) They would simply use different frequencies to allow for overlap. Only 20 or so different frequencies could cover however large an area they wanted. Because the car must travel 2km before it needs the map - they wouldn't even require a high bandwith solution. Hell, each channel probably wouldn't need more then what an FM radio station gets. --- Just think, each road can be represented by a vector (and a few arcs). A 4 square km section would have under 100 roads. So you're basically sending 100 vectors with some speed info. The bandwith of one FM radio station would be overkill.

    I seriously doubt there would be any two-way communications. The "map + speedlimit" data could be broadcast just like they do with the GPS data. A simple little on-board computer could do the work. This would also result in a much more reliable system - much like how radio is today.

    This most definately can be done. But then I'm sure it will also be easy to disable if you have some electronics knowledge.. ;)

    Willy

  8. Re:Affect hardware sales? on OS X on x86? · · Score: 1
    Just now they are getting GeForce2 MX class chips and making a big deal about it, and NV20 is on the horizon!

    That's right!!! And it's coming with Mac support. The only reason why the MX chip is the only chip that currently support the Mac is because it's their most recent chip. All future chips will have built in support for Macs.

    While the G4's and all may certainly be elegant and Mac's elegantly architectured, they're slow.

    I think both of you are trying to say the same thing. Elegance and speed aren't always the same thing. A porche boxter (spelled right?) is most certainly more elegant then an old camaro, but stick a 500HP motor in that camaro and it'll be the faster of the two. The porche however is still the beter designed car.

    I'm sure Apple would love to sell faster G4s - but there aren't any. Apple isn't to blame - they just make the best computers that they can with their slow G4s. They're still very good computers. If Motorola ever gets their act together........

    Willy

  9. Re:Problem: Processors are too hot. on Cooling Hardware With Microfans · · Score: 1
    Under closer inspection, it appears that the plastic cover is used to channel air from the outside of the case directly over the heat sink. If you look at the picture above the one previously mentioned, you see that there is an air vent in the back just behind the heat sink. While it's impossible to tell for sure, it appears that the plastic casing channels air from this vent. This would also explain the need for that plastic casing.

    Willy

  10. Re:Problem: Processors are too hot. on Cooling Hardware With Microfans · · Score: 1
    There IS no processor fan on the new G4 models. There's a huge honkin' heat sink on it (which sits next to the power supply and an external vent when the door's closed), but there is no direct cooling on the processor. So, no, I don't think you've seen a picture of the latest G4. If you had, you wouldn't've claimed they encased the processor in plastic.

    It looks like the 7450 does get a CPU fan. Look at the picture near the bottom of the following link:

    http://www.xlr8yourmac.com/G4ZONE/G4_533mhz_revi ew /

    While you can't see the fan, you can see the power cable leading into the plastic enclosed heat sink. One can only assume this leads to a CPU fan.

    Willy

  11. Re:Too positive. on NeXT Lives -- In Apple · · Score: 1
    Anyway, the G4 low power is really, really nice for laptop, it is a pity though that the G4+ has such a bigger power consumption: it won't be as good as the G4 for the desktop

    You're right about the G4 being a great chip for laptops. But about the power consumption - the G4e uses 14watts average (17 max). Compare that to the new mobile Duron at ~24w or the (original) G4 at 10w and you see that it should be very possible to place the new G4e in a laptop. Especially once you consider that the G4e will soon move to a .13 micron design - and SOI - power consumption will drop to that of today's G3s.

    Willy

  12. Re:Proper mouse buttons? on Linux PPC Boots On The Powerbook G4 Titanium · · Score: 2
    I can't understand why anyone would want just one mouse button, but that's not the point.

    Some examples for you:
    - My Grandfather. Trying to get a 92 year old man to understand what the second mouse button does is near impossible. Because of his poor motor skills, he reguarly hits the wrong mouse button. This is frustrating both for him and myself because I have to explain why the computer didn't do what he thought he told it to do.
    - My Father. He hates computers and basically just uses them for his eMail. He doesn't use contextual menus nor does he care to. For him, two mouse buttons is one too many.
    - My Nephew. Sure he'll learn, and probably appreciate the extra mouse button, but right now it just complicates things for him.

    There are people out there who only want one mouse button. In fact, the majority of people out there with two only use the one anyway. (This of course excludes /. users.)

    Don't forget the audience for which Apple targets their computers. For those people, one mouse button is exactly what they need.

    The point is that, in the context of using X, one mouse button is just not cutting it.

    Don't forget that MacOSX is designed to be used with one mouse button. It supports additional buttons but no programs out there require any additional buttons - they work great with only one. Now if you're talking about XWindows then that's a different story. But don't forget, OSX and XWindows both target different audiences.

    Willy

  13. FreeBSD & Directory Services on Learn From Robert Watson Of FreeBSD And TrustedBSD · · Score: 2

    Microsoft has Active Directory.
    Novell has NDS.
    NextStep has NetInfo.

    Will FreeBSD be supporting any type of directory service? I know there's always DNS but I was thinking of something a little more powerful.

    What I (and most network admins) would like is a nice central way to manage users, computers, or any other network "object". In order for this to work well the service will probably have to be added to the distro - not just supplied as an external package (hence your envolvement.)

    I was thinking that since NetInfo has been opensourced it might be a good solution. I know a Linux port already exists.

    Making xxBSD easy to setup and administer would greatly increase its appeal to network administers. During the install procedure you should have the option "connect via NetInfo" where everything is done for you - you shouldn't even have to assign it a root password. All administration, and I mean everything, should be done from a central location. (I know most UNIX gurus probably want their commands like "adduser" - but some type of directory service should still be an option.)

    Aah, network nirvana...
    Willy

  14. Re:Powerbook G4 on A Basket Full of Apple News · · Score: 1

    Sorry, that was an AC adapter not an external charger. Willy

  15. Re:Powerbook G4 on A Basket Full of Apple News · · Score: 1
    4 grand for their "loaded" model. Only has 256mb RAM but that's easy to upgrade. The addition of firewire on the Mac really helps out, it greatly simplifies adding additional IDE devices. Also includes an extra Lithium battery + charger. Most people don't care about floppy drives anymore, they're used so infrequently that external drives are just fine.

    I'm usually quite unimpressed with Apple prices but this new Powerbook look pretty damn good compared to that IBM.

    Willy

  16. More SMP in the future. on A Basket Full of Apple News · · Score: 1
    The lack of SMP machines is because of Motorola not being able to supply enough G4 chips. If Motorola gets their act together then more SMP options should start showing up again. Apple just wants to avoid the bad press associated with not being able to deliver what they promise. (ie, delivering lots of fast G4 chips)

    Willy

  17. Re:Give it a rest on A Basket Full of Apple News · · Score: 1
    OSX support HID devices so all of your USB multibutton mice with scroll wheels will work fine, I know mine does. The single button is for those "simple" users who don't want to learn about computers and keep on making the "what button do I press" mistake with Windows. And for your information, these people are the majority.

    As it is often said, "keep it simple stupid" - this is exactly whay Apple is doing for their customers. (Mind you, a BTO option would be a nice.)

    Willy

  18. Re:Not an option for PowerBooks... :( on A Basket Full of Apple News · · Score: 2
    Just stick it in an external firewire/IDE case. One should be able to purchase it for clones in the next few months. Read the article on tomshardware.com to learn more about the firewire/ide case. It's listed under storage. Also works great with a PC laptop and a firewire PCMCIA card.

    Willy

  19. Re:AGP 4X and nVidia GFX on A Basket Full of Apple News · · Score: 1
    The interesting thing is that the Radeon option (32meg DDR) costs the same as the nVidia (MX 32meg SDRAM.) Wouldn't the Radeon be a lot faster then the crippled nVidia? (Crippled by the fact it's using SDRAM while also not being their fastest chip.)

    Oh well, but to answer your question: Mac support wasn't designed into the nVidia chips you mentioned. Only the most recent MX chipset has Mac support. Expect their forthcoming chips to also support Macs.

    A bit off topic here, why do I all the sudden have the ability to moderate? I mean one second I don't and the next I do. Not that I mind - it just comes as a bit of a suprise. ;)

    Willy

  20. Re:Breakthrough? on Java On 8-bit Platforms · · Score: 4
    I can't believe this, since every single modern, useful chip has at least 16 bit words!

    Two reasons why we still have, and probably always will have 8 bit chips:

    Cost : 8 bit chips are cheaper to make.
    Power Consumption : 8 bit chips use less power.

    I can see no reason why a simple, non-scientific calculator would ever want to use a 16 bit chip. It would cost more to make and require a larger solar panel. What's the point? There are more 8 bit chips out in the marketplace then any other type of chip and this isn't going to change any time soon. Eight bits is hardly useless.

    Willy

  21. They know what they're doing. Blame the public. on Review: "The Sixth Day" · · Score: 1

    Politicians listen to their advisors when it comes to passing laws. If it's of a technical nature then they will consult with people that know the technology. They also look at environmental concerns and just about everything else imaginable. The one "bad" thing they also consider is public opinion. They want to make the public happy - this doesn't always lead to the best decisions. Because of this laws are often passed - laws with a pile of backdoors that allow things to still get done.

    Democracy would be perfect if the public were intelligent. But as a whole, we're pretty stupid. Just look at the government, they typically do what the public wants but rarely do the right thing.

    Willy

  22. Re:(deity of your choice) bless hypocracy... on Do-It-Yourself "Dungeons and Dragons" Film Review · · Score: 1

    I don't think you got the point he was trying to make. He was just stating that one can associate hatred/violence/bigotry with D&D no more then they can with Christianity. Yes, there are some D&D frieks out there but it's the same with just about anything - including Christianity.

    As far as the atheist self-righteous rantings go - can you really blame him? I myself am an atheist and I constantly have people knocking on my door, giving me pamphlets, and simply put - getting in my way. It gets to be very frustrating and just pisses me off. No one belief is to blame - they all have their part. My problem isn't with religion so much as it's with the way many people insist on forcing their beliefs upon me. The religious people who do this are most definatly in the minority. I know many wonderful people from various different religions who would _never_ do this. The problem is, it's the assholes that stand out from the crowd. This gives religion a bad rep - hence the negative attitude.

    It comes down to this: No one wants another person pushing their views onto them. When conversing with another individual don't bring up anything that has to do with religion. This goes for atheists and Christians alike. We'll never agree so why bring it up?

    Also, one should just disregard any negative postings / comments they read. The comment of one individual doesn't speak for the group - be they atheist or Catholic.

    Willy

  23. Re:An ounce of prevention... on Users Hack Aqua to Make It More Usable · · Score: 1

    It also works in the "Classic" MacOS. Just create a file titled "hosts" and place it in your System Folder. Then go to the TCPIP control panel and point it to your host file. Works great!!

    Willy

  24. Possible solution.. on Netscape Users Rejoice · · Score: 1
    I've got an idea.... Why not have a setting (in conjunction with the existing +x minimum) where posts get displayed depending on their age. If it's under 1/2 hour old it gets displayed with the other (+x minimum) posts. This would give it a chance to get modded up if it deserves it. If it sucks, it's gone in half an hour.

    Would this be that hard to implement?

    Another idea - Have the rating scale go from 0->5 like it currently does but then add a new rating titled "New". After 1/2 hour any "New" ratings would get converted to 1. Then if a post isn't worthy a moderator could assign it a 1 and it would get filtered out right away.

    I guess the ideas are basically the same -- but are they any good??

    Willy

  25. A new FPU.. on Nintendo GameCube Preview · · Score: 1
    I don't know about the Gekko but IBM does use an enhanced FPU in most of their chips (non Apple.) The G3 and the 603e share the same FPU - it's not that good. The G4 has the same FPU as the 604e which is very good. The Gekko will most likely have the FPU from the G4.

    IBM did also add some "Altivec like" instructions to the Gekko. I don't think they're nearly as extensive or versatile as Altivec but they should be perfect for the Dolphin.

    Willy