Comments for Brooks Moses: Notes on Divergent Simulations http://notes.dpdx.net Fluid Dynamics, Computer Simulations, and Assorted Tinkering Thu, 28 Aug 2008 01:09:40 +0000 http://wordpress.org/?v=2.5.1 Comment on Time synchronization in a VMWare box running GNU/Linux by Nishant http://notes.dpdx.net/2007/03/07/time-synchronization-in-a-vmware-box-running-gnulinux/#comment-18359 Nishant Fri, 01 Aug 2008 10:55:22 +0000 http://notes.dpdx.net/2007/03/07/time-synchronization-in-a-vmware-box-running-gnulinux/#comment-18359 Hey, It doesn't work if your clock is losing more than a minute in two minutes. Because the crontab fires by the system's clock. So I saw the time update from 3:40 to 3:42 when the crontab fired. Hey,

It doesn’t work if your clock is losing more than a minute in two minutes. Because the crontab fires by the system’s clock. So I saw the time update from 3:40 to 3:42 when the crontab fired.

]]> Comment on Penny Smith’s Proof on the Navier-Stokes Equations by Nonoscience / Philosophia Naturalis Part Deux http://notes.dpdx.net/2006/10/06/penny-smiths-proof-on-the-navier-stokes-equations/#comment-18240 Nonoscience / Philosophia Naturalis Part Deux Mon, 28 Jul 2008 17:17:13 +0000 http://notes.dpdx.net/2006/10/06/penny-smiths-proof-on-the-navier-stokes-equations/#comment-18240 [...] Instead of directing us to the more sensational blog posts on this topic, we shall direct us to Penny Smith�s Proof on the Navier-Stokes Equations, a post by Brooks Moses at his Notes on Divergent Simulations blog, which explains the technical [...] [...] Instead of directing us to the more sensational blog posts on this topic, we shall direct us to Penny Smith�s Proof on the Navier-Stokes Equations, a post by Brooks Moses at his Notes on Divergent Simulations blog, which explains the technical [...]

]]> Comment on Why can’t a car engine run on water? by mark http://notes.dpdx.net/2006/05/23/why-cant-a-car-engine-run-on-water/#comment-17954 mark Sun, 20 Jul 2008 13:33:53 +0000 http://notes.dpdx.net/2006/05/23/why-cant-a-car-engine-run-on-water/#comment-17954 If a car can be run on water only then the worlds energy problems are solved.! However that would be perpetual energy which defies the basic principals of physics and chemistry.Chemical theory suggests that you must put as much energy into splitting water molecules as you can get by burning hydrogen.HHO conversions increase the efficiency of the engines fuel and does not produce any net energy once consideration of the load on the engines alternator is accounted.If I am wrong pleeeease tell me.I want to be wrong! If a car can be run on water only then the worlds energy problems are solved.! However that would be perpetual energy which defies the basic principals of physics and chemistry.Chemical theory suggests that you must put as much energy into splitting water molecules as you can get by burning hydrogen.HHO conversions increase the efficiency of the engines fuel and does not produce any net energy once consideration of the load on the engines alternator is accounted.If I am wrong pleeeease tell me.I want to be wrong!

]]> Comment on Why can’t a car engine run on water? by Jack http://notes.dpdx.net/2006/05/23/why-cant-a-car-engine-run-on-water/#comment-17146 Jack Mon, 09 Jun 2008 23:40:29 +0000 http://notes.dpdx.net/2006/05/23/why-cant-a-car-engine-run-on-water/#comment-17146 How many cubic inches of atmospheric pressure H2 is there in a quart of water? We run IC engines on propane. H2 is a better fuel than propane so why not. You don't have to compress the H2 in high pressure cylinders to use the H2 -- You just have to release it from the H20 and run a small gas pump to put into the same system of a converted car engine, running on propane. How many cubic inches of atmospheric pressure H2 is there in a quart of water? We run IC engines on propane. H2 is a better fuel than propane so why not. You don’t have to compress the H2 in high pressure cylinders to use the H2 — You just have to release it from the H20 and run a small gas pump to put into the same system of a converted car engine, running on propane.

]]> Comment on Why can’t a car engine run on water? by Hayath http://notes.dpdx.net/2006/05/23/why-cant-a-car-engine-run-on-water/#comment-16690 Hayath Sun, 11 May 2008 04:07:23 +0000 http://notes.dpdx.net/2006/05/23/why-cant-a-car-engine-run-on-water/#comment-16690 I am young graduate. Just left my job in Dubai and came back to india to work on hydrogen engines. The arguement about transformers is not so suitable because transformer steps up the voltage at the cost of reducing Power [amps] in equal proposion. So without amps work cannot be done. So however i just want to know weather those electrons in electrolysis can make wonders or not. What cavalic compound we can add for easy and high density splitting of water molecules. I am young graduate. Just left my job in Dubai and came back to india to work on hydrogen engines. The arguement about transformers is not so suitable because transformer steps up the voltage at the cost of reducing Power [amps] in equal proposion. So without amps work cannot be done. So however i just want to know weather those electrons in electrolysis can make wonders or not. What cavalic compound we can add for easy and high density splitting of water molecules.

]]> Comment on Why can’t a car engine run on water? by figaro (peter njeru) http://notes.dpdx.net/2006/05/23/why-cant-a-car-engine-run-on-water/#comment-15878 figaro (peter njeru) Thu, 10 Apr 2008 09:42:21 +0000 http://notes.dpdx.net/2006/05/23/why-cant-a-car-engine-run-on-water/#comment-15878 very good arguments. but is what is on sale -technology kit workable? has anyone tried it out yet? very good arguments. but is what is on sale -technology kit workable? has anyone tried it out yet?

]]> Comment on Penny Smith’s Proof on the Navier-Stokes Equations by a-kozachok1 http://notes.dpdx.net/2006/10/06/penny-smiths-proof-on-the-navier-stokes-equations/#comment-14970 a-kozachok1 Sat, 15 Mar 2008 10:59:25 +0000 http://notes.dpdx.net/2006/10/06/penny-smiths-proof-on-the-navier-stokes-equations/#comment-14970 Dear Brooks ! I very hope, that you and your colleagues from US universities will formulate the comment in this occasion: MILLENNIUM PRIZE PROBLEM (NAVIER– STOKES EQUATIONS) IS SOLVABLE BY CLASSICAL METHODS. The Navier-Stokes equations can be reduced correctly to more simple classical equations of mathematical physics . The problem of an existence proof of solutions of such equations is not so actual. 1. It is known, divu and divv are identical to infinitesimal magnitude and velocity of the relative modification of the infinitesimal volume. Therefore divergency of acceleration divw - acceleration of the relative modification of the same volume. In that case for incompressible liquid alongside with requirements divu=0, divv=0 is necessary to accept divw=0. 2.The requirement divw=0 for incompressible liquid is formulated by analogy and proved. Operation div will convert the Navier – Stokes equations to the three-dimensional Laplace equation for pressure p=p(x,y,z,t) at some limitations of a mass force vector. The time t enters into Laplace equation as parameter. Read more on http://a-kozachok1.narod.ru ,“Sixth Millennium Problems (NAVIER-STOKES equations) is solvable by classical methods” (Russian). Yours faithfully, Alexandr Kozachok Dear Brooks !
I very hope, that you and your colleagues from US universities will formulate the comment in this occasion:
MILLENNIUM PRIZE PROBLEM (NAVIER– STOKES EQUATIONS) IS SOLVABLE BY CLASSICAL METHODS.
The Navier-Stokes equations can be reduced correctly to more simple classical equations of mathematical physics . The problem of an existence proof of solutions of such equations is not so actual.
1. It is known, divu and divv are identical to infinitesimal magnitude and velocity of the relative modification of the infinitesimal volume. Therefore divergency of acceleration divw - acceleration of the relative modification of the same volume. In that case for incompressible liquid alongside with requirements divu=0, divv=0 is necessary to accept divw=0.
2.The requirement divw=0 for incompressible liquid is formulated by analogy and proved. Operation div will convert the Navier – Stokes equations to the three-dimensional Laplace equation for pressure p=p(x,y,z,t) at some limitations of a mass force vector. The time t enters into Laplace equation as parameter.
Read more on http://a-kozachok1.narod.ru ,“Sixth Millennium Problems (NAVIER-STOKES equations) is solvable by classical methods” (Russian).

Yours faithfully, Alexandr Kozachok

]]> Comment on Fixing AC power plugs in various HP and Compaq laptops by Nicolas P. http://notes.dpdx.net/2006/03/18/fixing-ac-power-plugs-in-various-hp-and-compaq-laptops/#comment-14215 Nicolas P. Mon, 25 Feb 2008 10:41:31 +0000 http://notes.dpdx.net/2006/03/18/fixing-ac-power-plugs-in-various-hp-and-compaq-laptops/#comment-14215 Reply to #IanL said, August 25, 2007 at 2:05 am I am a sole trader operating in the UK as a PC Tech, but my background is in engineering, and I have been taking things to pieces for years. Over the last week, I have had to repair three laptops with damaged power connectors/power adaptors, but the last one is causing me a major headache. It is an HP Pavilion ZD8000. This particular model uses an oval connector, and the adaptor has certainly failed. The replacement adaptor from HP is relatively expensive (£100 +) so I thought I would use the cable/plug from the old adaptor and make a custom cable for use with a Trust 130W supply - all well and good except HP use a 3 wire arrangement (V_out, V_ret and ID) I can measure 19v on the mobo at the appropriate points, but the beast will still not power up - leading to two possible conclusions: 1) laptop is goosed and I have wasted a lot of time or 2) the ID line has some significance which I have not yet unearthed… Anybody had any experience of this non-standard arrangement?? IanL Have almost same problem. Had the power supply (180W) burned out, made a temp fix that worked with an external conversion from oval to normal 2 pin connector by using the cable from faulty ps & gave it back to customer as a temp fix untill his replacement power supply come back.Brought it back after a couple days saying it never worked when he took it home. Tried it again no power up.Replacement power supply (135W) came in , no joy still no power up.135w means 7.1A - 180w 9.5A at 19V. The ZD8000 takes both according to HP Reply to

#IanL said,

August 25, 2007 at 2:05 am

I am a sole trader operating in the UK as a PC Tech, but my background is in engineering, and I have been taking things to pieces for years. Over the last week, I have had to repair three laptops with damaged power connectors/power adaptors, but the last one is causing me a major headache. It is an HP Pavilion ZD8000. This particular model uses an oval connector, and the adaptor has certainly failed. The replacement adaptor from HP is relatively expensive (£100 +) so I thought I would use the cable/plug from the old adaptor and make a custom cable for use with a Trust 130W supply - all well and good except HP use a 3 wire arrangement (V_out, V_ret and ID) I can measure 19v on the mobo at the appropriate points, but the beast will still not power up - leading to two possible conclusions: 1) laptop is goosed and I have wasted a lot of time or 2) the ID line has some significance which I have not yet unearthed…

Anybody had any experience of this non-standard arrangement??

IanL

Have almost same problem.
Had the power supply (180W) burned out, made a temp fix that worked with an external conversion from oval to normal 2 pin connector by using the cable from faulty ps & gave it back to customer as a temp fix untill his replacement power supply come back.Brought it back after a couple days saying it never worked when he took it home.
Tried it again no power up.Replacement power supply (135W) came in , no joy still no power up.135w means 7.1A - 180w 9.5A at 19V.
The ZD8000 takes both according to HP

]]> Comment on Penny Smith’s Proof on the Navier-Stokes Equations by Alexandr Kozachok http://notes.dpdx.net/2006/10/06/penny-smiths-proof-on-the-navier-stokes-equations/#comment-13787 Alexandr Kozachok Sun, 17 Feb 2008 03:36:45 +0000 http://notes.dpdx.net/2006/10/06/penny-smiths-proof-on-the-navier-stokes-equations/#comment-13787 MILLENNIUM PRIZE PROBLEM (NAVIER– STOKES EQUATIONS) IS SOLVABLE BY CLASSICAL METHODS Kozachok A.A., Kiev, Ukraine Formulated by Clay Mathematics Institute the sixth Millennium Problems about existence and smoothness of solutions of the Navier – Stokes equations periodically was discussed at numerous forums (http://grani.ru/Society/Science/m.112524.html). On recognition of some commentators the complete presentation of problem’s solution can demand about thousand pages for mathematical formulas (http://lib.mexmat.ru/forum/viewtopic.php?t=4289). The author of Official Problem Description–Charles Fefferman has set the task about demonstration of existence and smoothness of the solution, instead of solution’s obtaining. However, the Navier-Stokes equations can be reduced correctly to more simple classical equations of mathematical physics . The problem of an existence proof of solutions of such equations is not so actual. It is known, divu and divv are identical to infinitesimal magnitude and velocity of the relative modification of a volume element of the strained medium. Therefore divergency of acceleration divw, probably, there is a magnitude, identical to a acceleration of the relative modification of the same volume. In that case for incompressible liquid alongside with requirements divu=0, divv=0 it is necessary to accept divw=0. The requirement divw=0 for incompressible liquid is formulated by analogy and proved. Operation div will convert the Navier – Stokes equations to the three-dimensional Laplace equation for pressure p=p(x,y,z,t) at some limitations of a mass force vector. The time enters into Laplace equation as parameter. Laplacian of the Navier – Stokes equations (pressure p=p(x,y,z,t) – harmonic function) and a change of a variable (velocity on acceleration) allow to gain system of conventionally independent integro-differential equations with acceleration’s components w. In that case components of the acceleration for ideal incompressible liquid are harmonic functions too. The change of a variable allows to use boundary conditions of an adhesion of a fluid absolutely correctly. According to this requirement vectors of acceleration on firm immobile boundary line are equal to null. Conversion of the Navier-Stokes equations to more simple equations has actually removed a problem of an existence proof and smoothness of their solution. It is possible to use known effects about properties of harmonic functions or representation of the common decision of the Laplace equation (http://continuum-paradoxes.narod.ru, the link « Manual, p.1 », p. 58). More in detail on a site http://continuum-paradoxes.narod.ru, the link “Russian pages”, “Sixth Millennium Problems (NAVIER-STOKES equations) is solvable by classical methods (in Russian)”. Yours faithfully, Alexandr Kozachok MILLENNIUM PRIZE PROBLEM (NAVIER– STOKES EQUATIONS) IS SOLVABLE BY CLASSICAL METHODS

Kozachok A.A., Kiev, Ukraine

Formulated by Clay Mathematics Institute the sixth Millennium Problems about existence and smoothness of solutions of the Navier – Stokes equations periodically was discussed at numerous forums (http://grani.ru/Society/Science/m.112524.html). On recognition of some commentators the complete presentation of problem’s solution can demand about thousand pages for mathematical formulas (http://lib.mexmat.ru/forum/viewtopic.php?t=4289). The author of Official Problem Description–Charles Fefferman has set the task about demonstration of existence and smoothness of the solution, instead of solution’s obtaining. However, the Navier-Stokes equations can be reduced correctly to more simple classical equations of mathematical physics . The problem of an existence proof of solutions of such equations is not so actual.
It is known, divu and divv are identical to infinitesimal magnitude and velocity of the relative modification of a volume element of the strained medium. Therefore divergency of acceleration divw, probably, there is a magnitude, identical to a acceleration of the relative modification of the same volume. In that case for incompressible liquid alongside with requirements divu=0, divv=0 it is necessary to accept divw=0.
The requirement divw=0 for incompressible liquid is formulated by analogy and proved. Operation div will convert the Navier – Stokes equations to the three-dimensional Laplace equation for pressure p=p(x,y,z,t) at some limitations of a mass force vector. The time enters into Laplace equation as parameter.
Laplacian of the Navier – Stokes equations (pressure p=p(x,y,z,t) – harmonic function) and a change of a variable (velocity on acceleration) allow to gain system of conventionally independent integro-differential equations with acceleration’s components w. In that case components of the acceleration for ideal incompressible liquid are harmonic functions too. The change of a variable allows to use boundary conditions of an adhesion of a fluid absolutely correctly. According to this requirement vectors of acceleration on firm immobile boundary line are equal to null.
Conversion of the Navier-Stokes equations to more simple equations has actually removed a problem of an existence proof and smoothness of their solution. It is possible to use known effects about properties of harmonic functions or representation of the common decision of the Laplace equation (http://continuum-paradoxes.narod.ru, the link « Manual, p.1 », p. 58). More in detail on a site http://continuum-paradoxes.narod.ru, the link “Russian pages”, “Sixth Millennium Problems (NAVIER-STOKES equations) is solvable by classical methods (in Russian)”.
Yours faithfully, Alexandr Kozachok

]]> Comment on Why can’t a car engine run on water? by Gary Landsen http://notes.dpdx.net/2006/05/23/why-cant-a-car-engine-run-on-water/#comment-12998 Gary Landsen Tue, 29 Jan 2008 02:46:10 +0000 http://notes.dpdx.net/2006/05/23/why-cant-a-car-engine-run-on-water/#comment-12998 Of course you can run a car on water. And in many situations there is more energy coming out then what came in. For example transformers inside plugs they change 120v into 9v and works the same way around if the electricity is coming from the other side. Of course you can run a car on water. And in many situations there is more energy coming out then what came in. For example transformers inside plugs they change 120v into 9v and works the same way around if the electricity is coming from the other side.

]]> Comment on Fixing AC power plugs in various HP and Compaq laptops by Linda C. http://notes.dpdx.net/2006/03/18/fixing-ac-power-plugs-in-various-hp-and-compaq-laptops/#comment-12769 Linda C. Tue, 22 Jan 2008 17:03:14 +0000 http://notes.dpdx.net/2006/03/18/fixing-ac-power-plugs-in-various-hp-and-compaq-laptops/#comment-12769 I have a Compaq Presario R3000. It appears as if I have problems with the ac connector must have disconnected from the motherboard as well. Does anyone have a picture of how to disassemble the notebook so that we can get to the motherboard? I want to at least try to remount it prior to just throwing it in the trash and never buying an HP laptop again. I have a Compaq Presario R3000. It appears as if I have problems with the ac connector must have disconnected from the motherboard as well. Does anyone have a picture of how to disassemble the notebook so that we can get to the motherboard? I want to at least try to remount it prior to just throwing it in the trash and never buying an HP laptop again.

]]> Comment on Fixing AC power plugs in various HP and Compaq laptops by Roan http://notes.dpdx.net/2006/03/18/fixing-ac-power-plugs-in-various-hp-and-compaq-laptops/#comment-12615 Roan Thu, 17 Jan 2008 20:57:43 +0000 http://notes.dpdx.net/2006/03/18/fixing-ac-power-plugs-in-various-hp-and-compaq-laptops/#comment-12615 Hi, I am presently repairing a Compaq Presario 2100 with power jack problem and a burned resistor (PR133). I already solved the power jack problem by resoldered it. I tested it with digital multimeter and seems fix the power jack problem. My main problem now is the small resistor was completely burned and also disconnected from the two black diodes (PD24 and PD25). Correct me if I'm wrong interpreting the values PD-for power diode and PR for power resistor (I only assumed that was definition based from my experience). First, I did the continuity testing from HOT (positive polarity) there was no connection after the end terminal of the burned PR133 resistor. So I assumed that the positive polarity stoped/disconnected because of the burned terminal. Second, I tested the GROUND (negative polarity to the rest of the mainboard and it had continuity. Now my assumption is right that the PR133 caused the NO POWER to the whole system board. Here is my main problem, I don't know the value of the PR133 resistor and couldn't recognized it because it was complete burned. I don't know if there is a generic substitution available in Radioshack. I don't know how to get the value either. Attached is the picture which I encircled the mentioned PR133 that was excerpt/taken from other person's Compaq Presario 2100 motherboard I found from other website link. I hope somebody can help me find the right value and where to secure one. Thanks. Compaq2100 user Hi,

I am presently repairing a Compaq Presario 2100 with power jack problem and a burned resistor (PR133). I already solved the power jack problem by resoldered it. I tested it with digital multimeter and seems fix the power jack problem. My main problem now is the small resistor was completely burned and also disconnected from the two black diodes (PD24
and PD25). Correct me if I’m wrong interpreting the values PD-for power diode and PR for power resistor (I only assumed that was definition based from my experience). First, I did the continuity testing from HOT (positive polarity) there was no connection after the end terminal of the burned PR133 resistor. So I assumed that the positive polarity stoped/disconnected because of the burned terminal. Second, I tested the GROUND (negative polarity to the rest of the mainboard and it had continuity.
Now my assumption is right that the PR133 caused the NO POWER to the whole system board. Here is my main problem, I don’t know the value of the PR133 resistor and couldn’t recognized it because it was complete burned. I don’t know if there is a generic substitution available in Radioshack. I don’t know how to get the value either.
Attached is the picture which I encircled the mentioned PR133 that was excerpt/taken from other person’s Compaq Presario 2100 motherboard I found from other website link.
I hope somebody can help me find the right value and where to secure one.

Thanks.
Compaq2100 user

]]> Comment on Fixing AC power plugs in various HP and Compaq laptops by Randy http://notes.dpdx.net/2006/03/18/fixing-ac-power-plugs-in-various-hp-and-compaq-laptops/#comment-11759 Randy Wed, 19 Dec 2007 01:57:07 +0000 http://notes.dpdx.net/2006/03/18/fixing-ac-power-plugs-in-various-hp-and-compaq-laptops/#comment-11759 PS I also agree that HP or some one should step up and take care of this class problem with these laptops. And can you believe the guy said that is what hp charges them for the jack. No wonder, they are making a killing off selling replacement jacks for their own screwup. PS I also agree that HP or some one should step up and take care of this class problem with these laptops. And can you believe the guy said that is what hp charges them for the jack. No wonder, they are making a killing off selling replacement jacks for their own screwup.

]]> Comment on Fixing AC power plugs in various HP and Compaq laptops by Randy http://notes.dpdx.net/2006/03/18/fixing-ac-power-plugs-in-various-hp-and-compaq-laptops/#comment-11758 Randy Wed, 19 Dec 2007 01:54:44 +0000 http://notes.dpdx.net/2006/03/18/fixing-ac-power-plugs-in-various-hp-and-compaq-laptops/#comment-11758 I had the same old bs on my hp5400 series. I didn't have the soldering ability so I took it apart and took it in to local shop. They robbed me of $39.95 for the jack and $40.00 labor for 5 mins work and the damn thing is already loose after 3 days. There are screws under everything that you can get out. The cd drive, the small circuit board near the display, just everything that is screwed down has screws under it. And all of the outer ones on the bottom of course. And I think under the hard drive caddy. Bottom line, if you see a screw head, it probably has to come out. I guess I will have to do it again an learn to solder on circuit boards myself. No use taking it back to Trinity computers in cleveland, TN so they can do another bad slodering job. I had the same old bs on my hp5400 series. I didn’t have the soldering ability so I took it apart and took it in to local shop. They robbed me of $39.95 for the jack and $40.00 labor for 5 mins work and the damn thing is already loose after 3 days.
There are screws under everything that you can get out. The cd drive, the small circuit board near the display, just everything that is screwed down has screws under it. And all of the outer ones on the bottom of course. And I think under the hard drive caddy. Bottom line, if you see a screw head, it probably has to come out. I guess I will have to do it again an learn to solder on circuit boards myself. No use taking it back to Trinity computers in cleveland, TN so they can do another bad slodering job.

]]> Comment on Penny Smith’s Proof on the Navier-Stokes Equations by Alexandr Kozachok http://notes.dpdx.net/2006/10/06/penny-smiths-proof-on-the-navier-stokes-equations/#comment-11640 Alexandr Kozachok Sat, 15 Dec 2007 09:22:34 +0000 http://notes.dpdx.net/2006/10/06/penny-smiths-proof-on-the-navier-stokes-equations/#comment-11640 Dear Dmitri Gorskin! Where your "exact analytical solution" is published? Alexandr Kozachok Dear Dmitri Gorskin!
Where your “exact analytical solution” is published?
Alexandr Kozachok

]]> Comment on Fixing AC power plugs in various HP and Compaq laptops by Dan http://notes.dpdx.net/2006/03/18/fixing-ac-power-plugs-in-various-hp-and-compaq-laptops/#comment-11323 Dan Wed, 05 Dec 2007 13:15:31 +0000 http://notes.dpdx.net/2006/03/18/fixing-ac-power-plugs-in-various-hp-and-compaq-laptops/#comment-11323 Thank you all for spending time asking the questions that I have already had. It has been extremely helpful. My question is this; could I simply solder the wires from the ac power cord directly to the motherboard? I know this would create a permanent plug, but the battery on my Compaq Presario 2100 is shot anyway so I have to always have it plugged in. I would like to know if there is even an easier way to fix the broken jack without having to purchase anything. My dog already chewed through the plug once, so I simply cut out the bad section and now have the mb exposed and the wires from the power cord. Is there a way to do this directly from here? I only removed the broken plastic housing from the old power jack. The three prongs are still in place. I just need to know if I can somehow hook them together and if so, which prongs I should use and how. Any help would be fantastic!!! Thanks Thank you all for spending time asking the questions that I have already had. It has been extremely helpful. My question is this; could I simply solder the wires from the ac power cord directly to the motherboard? I know this would create a permanent plug, but the battery on my Compaq Presario 2100 is shot anyway so I have to always have it plugged in. I would like to know if there is even an easier way to fix the broken jack without having to purchase anything. My dog already chewed through the plug once, so I simply cut out the bad section and now have the mb exposed and the wires from the power cord. Is there a way to do this directly from here? I only removed the broken plastic housing from the old power jack. The three prongs are still in place. I just need to know if I can somehow hook them together and if so, which prongs I should use and how. Any help would be fantastic!!! Thanks

]]> Comment on Penny Smith’s Proof on the Navier-Stokes Equations by Dmitri Gorskin http://notes.dpdx.net/2006/10/06/penny-smiths-proof-on-the-navier-stokes-equations/#comment-11285 Dmitri Gorskin Tue, 04 Dec 2007 10:53:54 +0000 http://notes.dpdx.net/2006/10/06/penny-smiths-proof-on-the-navier-stokes-equations/#comment-11285 I found exact analytical solution for 3 D viscous nonsteady flow(without cappilar effect) many years ago.But I never thought,that it is nesessary to prove existence this smooth solution for small period of time.It is clear, like a day. But when I start research it, I was surprised.The water has two properties, like living object(like cell).Competition and reproductions some of his parameters.It was amazing. I found exact analytical solution for 3 D viscous nonsteady flow(without cappilar effect) many years ago.But I never thought,that it is nesessary to prove existence this smooth solution for small period of time.It is clear, like a day.
But when I start research it, I was surprised.The water has two properties, like living object(like cell).Competition and reproductions some of his parameters.It was amazing.

]]> Comment on Free-software licenses: requirements vs. requests. by naisioxerloro http://notes.dpdx.net/2006/04/24/free-software-licenses-and-obligations/#comment-11110 naisioxerloro Wed, 28 Nov 2007 16:32:32 +0000 http://notes.dpdx.net/2006/04/24/free-software-licenses-and-obligations/#comment-11110 Hi. Good design, who make it? Hi.
Good design, who make it?

]]> Comment on Fixing AC power plugs in various HP and Compaq laptops by Tom http://notes.dpdx.net/2006/03/18/fixing-ac-power-plugs-in-various-hp-and-compaq-laptops/#comment-9851 Tom Fri, 02 Nov 2007 00:43:20 +0000 http://notes.dpdx.net/2006/03/18/fixing-ac-power-plugs-in-various-hp-and-compaq-laptops/#comment-9851 I have a HP XT412 that has a broken connection on the power jack. seems like an easy fix if i can get it open. is there an hidden set of screws? it seems to be held together in the center. any help would be great. I have a HP XT412 that has a broken connection on the power jack. seems like an easy fix if i can get it open. is there an hidden set of screws? it seems to be held together in the center. any help would be great.

]]> Comment on Fixing AC power plugs in various HP and Compaq laptops by ernestom http://notes.dpdx.net/2006/03/18/fixing-ac-power-plugs-in-various-hp-and-compaq-laptops/#comment-8898 ernestom Mon, 08 Oct 2007 20:07:17 +0000 http://notes.dpdx.net/2006/03/18/fixing-ac-power-plugs-in-various-hp-and-compaq-laptops/#comment-8898 I have a similar problem with a Compaq Presario V3000Z. It's still under warantee in the US, but I'm living in Argentina, so that won't help. Email with HP in the US suggested it might be the AC Adapter or the pins to the motherboard. Local HP, without opening my computer, claims my motherboard will need replaced, because they don't do "repairs". Another local repair shop tested my machine with their own AC Adapter and they claim it worked (I wasn't present to witness this). This might be true, since I've used the US power adapter in Brasil, Colombia and Argentina. Maybe I messed it up? So I can buy a new AC Adapter (~$35) here in Argentina. But my problem seems to be similar to what's described here and in http://www.delanoscientific.com/cpq1675.html. I'm gonna purchase the extra power adapter. And we'll see. Any advice would be welcome, as I've never touched a soldering iron in my life. :-( I have a similar problem with a Compaq Presario V3000Z. It’s still under warantee in the US, but I’m living in Argentina, so that won’t help.

Email with HP in the US suggested it might be the AC Adapter or the pins to the motherboard. Local HP, without opening my computer, claims my motherboard will need replaced, because they don’t do “repairs”. Another local repair shop tested my machine with their own AC Adapter and they claim it worked (I wasn’t present to witness this).

This might be true, since I’ve used the US power adapter in Brasil, Colombia and Argentina. Maybe I messed it up?

So I can buy a new AC Adapter (~$35) here in Argentina. But my problem seems to be similar to what’s described here and in http://www.delanoscientific.com/cpq1675.html.

I’m gonna purchase the extra power adapter. And we’ll see. Any advice would be welcome, as I’ve never touched a soldering iron in my life. :-(

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