Ground Plane adj.

In the new CS5 3D module, is there a way to adjust the ground plane to a 3D object rather than the other way around?

Hello,
Would you be able to provide us with your file to take a look at what's going on?
Kind regards,
Miguel V
National Instruments

Similar Messages

How do I remove the ground plane shadow in Photoshop CC 2014 when working with 3D?

Is it possible? I still want to maintain the shadow on the 3D object itself but I don't want the 3D object to cast a shadow on the ground plane. How can this be achieved?

In your 3D panel, click on the Environment.
Now look in your Properties panel. There are Ground Plane settings there, including an Opacity control. Set that to 0% and you should be good to go.
-Noel

Then 'm selecting 3 points after camera tracker and right click them there is no SET GROUND PLANE in the list, can U help me?

Then 'm selecting 3 points and right click them there is no SET GROUND PLANE in the list, can U help me?

Quit farting around with the camera tracker. You're not nearly ready to handle it. Go here:
Getting started with After Effects (CS4, CS5, CS5.5, CS6, & CC)

How to show ground plane grid in 3D (CS5)

I am trying to show the plane as you can see in this image I found online.
My screen does not show this. I have selected View>Show>3D Ground Plane but that does not work.
Any suggestions?

Hi,
You have to have one of the 3D tools selected for the grid to display. Try pressing 'K' or 'N'. If that doesn't turn it on, then go to View> Extras and click it to give it a check mark (or toggle Hide/Show with Ctrl/Cmd+H).
regards,
steve

Snap object to ground plane not showing in 3D menu

I seem to be missing the "Snap Object To Ground Plane" menu item in the 3D menu. This recently happened and I don't know how to get it back. Any help would be appreciated.

Actually, I never noticed that. But it's not the one I am looking for, since it's not drawing shadows on the plane.
Here is where I am talking about, in the 3D window:
Perhaps I am missing something else, since you were able to show me that which I never saw before. Thank you.

3D ground plane grid not visible in CC 2014.0.0

Hi,
i am a Creative Cloud member and since the 2014.0.0 CC version, i am not able to show anymore the 3D ground plane grid.
I use a MacBook Pro Retina (Half 2012), with a NVIDIA GeForce GT 650M (1024 Mo) and OS X 10.9.4.
Regards.

I have the same question. Adobe is really dropping the ball on this one. I've seen this question asked in multiple places with no response and no answer.

Photoshop CC Ground Plane grid spacing/density settings?

I was working with some extruded text (just learning 3D aspects of PS) and it appeared that my ground plane disappeared. So while I can see the extruded text and manipulate it and the camera as expected (normally) the ground plane appears to not be there. However upon closer inspection it looks as though the density of the ground plane grid spacing increased significantly (or perhaps got very small?). In the secondary view window while viewing the TOP view, the underlying grid shows, but is very dense, that is it's very closely spaced. It kind of looks like tweed.
I was thinking that I somehow unwittingly screwed up some setting in the document so I created a new document from scratch. I then created a sphere mesh from preset and the grid spacing didn't change from the previous document. It behaves as described above.
Any ideas/suggestions?
Thanks

Chris,
Thanks for the response... I have a GeForce GTX580 card (Win 7 on an Alienware Aurora with 24GB RAM). The thing is, it was working fine at some point... just haven't used 3D in PS CC in a while so I'm not sure which update may have caused an issue. All other 3D features work fine so I can't imagine why displaying the ground plane would be that taxing on my system so as to be faint/nearly invisible. Not the biggest issue in the world but I kind of got used to seeing it and it's throwing me off a bit

Separate ground plane reflections in 3d

is there any way to turn off the ground plane reflection for any one object in a 3d scene? i'm trying to create a mock-up of a bottle where the bottle is semi-transparent (clear plastic) but the label is opaque. i've done this by creating two bottle object, the idea being to leave one bottle (the semi-tansparent one) blank and put the label on the other one's extrusion. it's working out ok, except the semi-transparent bottle is screwing up the reflection so i'd like to turn that reflection off if possible. any help or suggestions would be appreciated.

Hi,
You have to have one of the 3D tools selected for the grid to display. Try pressing 'K' or 'N'. If that doesn't turn it on, then go to View> Extras and click it to give it a check mark (or toggle Hide/Show with Ctrl/Cmd+H).
regards,
steve

Ground Plane NOT Available

Okay. So I have built a 3D text object in PS CS5. I've pretty much got it where I want it and it seems to be snapping to the "ground". The only issue is that I cannot view the ground plane because my button is greyed out.
Now, before I go too much further, I will explain what I have:
Windows Vista Home Premium 64-bit
Core i7 920
12GB RAM (EVo GeiL)
ATi Radeon 4850 Dual DVi
OpenGL is running and selected in Performance
RAM is set to almost 8GB in Performance settings
Now, from what I read, this was initially an issue with OpenGL not either running or being the wrong version. That's not the case here. I have looked for the answer but have still found nothing that will assist in the cloud. So I am hoping someone here knows how I can get the Ground Plane to show up, or at least have the button un-greyed.
Thanks for your help.

Actually, I never noticed that. But it's not the one I am looking for, since it's not drawing shadows on the plane.
Here is where I am talking about, in the 3D window:
Perhaps I am missing something else, since you were able to show me that which I never saw before. Thank you.

Via (for external connection) does not connect to copper plane

I am trying to place a PTH via for external connection. This via suppose to connect to the ground plane (net 0). However, I am having trouble to assign this via to net 0. It always leave a gap between the via and the copper plane.
Please help!!!!!
Jake
Attachments:
Via to GND plane.JPG ‏48 KB

Try this...
In the via properties window, to go the Via tab. Click the checkbox next to "Assume Net" and then select net 0 from the drop down list.
Hg

How to fanout ground on 2 layer board

I am attempting to fanout just the ground signals to the bottom ground plane on a 2 layer board. Normally, I would disable routing for all layers for all nets except ground, but this will not work. When I go to the nets tab, and uncheck all the layers for the routing column, the setting will not "take". It will always return with one of the layers checked. Any ides?
Tom

Hi Tom
Ultiboard does not have the option to fan out a net, it only have the option to fan out components. I will add this to the feature request list because I think the will be a very useful feature. Right you must do it manually and the quickest way is to click on the ground net on the spreadsheet and click on the “highlight” button, select PlaceàLine and click on the pin that belongs to a ground net, place you trace and press F2 on the keyboard this will automatically switch to a previously active layer which is usually the copper bottom, a via will be placed automatically when you do this.
Best regards,
Tien Pham
EWB Support
Tien P.
National Instruments

Connect digital analog ground

Greetings.
I have a mixed-signal Multisim design which I have forward annotated to Ultiboard. My Multisim circuits use 2 different grounds - net 0 and net DGND. For simplicity, I would like to prototype a first version of the boards with the grounds logically connected, so I don't need to worry about ground loops being created by the fact that I'm using separate digital and analog lab supplies.
I have checked the box in Multisim under "Sheet Properties -> PCB -> Connect digital ground to analog ground." I have transferred my design to Ultiboard 11 and specified a 4 layer board. Layer 3 is my ground plane, with a large copper area connected to Net 0. While placing components and vias on my board, I'm noticing that the thru-holes and vias I define as connected to Net 0 appear as I expect - with the "+" thermal relief on layer 3. However, vias logically connected to DGND are appearing on layer 3 with large areas of copper removed (I've specified 12 mils clearance on each copper layer). If I change the copper area on layer 3 to net DGND, instead of net 0, I notice the reverse situation. All of my analog ground vias and thru-holes have copper cleared away, and the DGND vias are now filled.
I don't believe a logical connection exists between net 0 and DGND in the forward annotated netlist. Is there some way I can confirm this? Did I miss a step in the process while trying to connect these two?

Thank you for your reply, Mark.
I was going to upload my Multisim project file, but then realized a lot of my components are now in my Corporate Database, so I can keep vendor and manufacturer-specific part numberings and inventory quantities all together in the same place. Instead, I took some screenshots and created a .pdf file. I uploaded the pdf file to transferbigfiles.com, here.
First, I snipped some sections of my design to illustrate the current state of things. On the first page, you can see that my default sheet properties are setup such that digital and analog grounds should be connected. I have an FMC-LPC connector "J17" in my design, with the "DGND" wired to it. The J17B pin actually represents about 40 different SMD pads on a VITA 57 connector. The DGND component is from the Master Database under Power Sources, though I think I renamed it from "DGND" to "GND." As you can see, Ultiboard is showing a lot of DRC errors right now because the vias are set to assume net "0" while the SMD pads were exported as connected to net DGND.
Next page, I unchecked the box "Connect digital ground to analog ground" and forward annotated the changes. Ultiboard found no differences.
Next I thought that perhaps my renaming of the default Refdes from "GND" to "DGND" could be the problem. So I went through my design and replaced all of my "DGND" triangles with the DGND component from the Master Database. As you pointed out, though the component is named "DGND" the Refdes is actually "GND." I left the sheet properties as is, with digital /analog grounds not connected. When I forward annotate the changes, I observe what I expect - the DGND connections are removed and replaced with GND connections. (Next page) The SMD pads are now logically connected to the net named GND instead of DGND.
Finally, I went back to Multisim and tried combining the nets "GND" and "0" automatically by selecting the check box in Sheet Properties. Unfortunately, when I forward annotate, Ultiboard detects no changes.
Following are 2 relevant sections of my .ewnet file I opened in a text editor, after my latest changes.
(net "0"
(trackwidth "6.00000000e+000")
(trackwidth_max "3.93700787e+002")
(trackwidth_min "6.00000000e+000")
(clearance_to_trace "6.00000000e+000")
(clearance_to_pad "6.00000000e+000")
(clearance_to_via "6.00000000e+000")
(clearance_to_copper "6.00000000e+000")
(routing_layer "1111")
(net_GUID "{8704ACB4-9808-4086-9C22-02206D379B13}")
(net "GND"
(net_GUID "{8EFCFB7F-F038-4362-A59D-667354159F44}")
Message Edited by pcurt on 02-22-2010 10:48 AM

FAQ: What features use the GPU and how do I troubleshoot GPU issues?

Photoshop CS6 GPU FAQ
Introduction
This document provides a quick reference guide to video card usage in Photoshop. Some features require a compatible video card to work; if the video card or its driver is defective or unsupported, those features will not work at all. Other features use the video card for acceleration and if the card or driver is defective those features will run more slowly.
Mercury Graphics Engine
The Mercury Graphics Engine (MGE) represents features that use video card, or GPU, acceleration. In Photoshop CS6, this new engine delivers near-instant results when editing with key tools such as Liquify, Warp, Lighting Effects and the Oil Paint filter. The new MGE delivers unprecedented responsiveness for a fluid feel as you work.
MGE is new to Photoshop CS6, and uses both the OpenGL and OpenCL frameworks. It does not use the proprietary CUDA framework from nVidia.
In order to use MGE, you must have a supported video card and updated driver. If you do not have a supported card, performance will be degraded. In most cases the acceleration is lost and the feature runs in the normal CPU mode. However, there are some features that will not work without a supported video card.
GPU features added in Photoshop CS6
Adaptive Wide Angle Filter (compatible video card required)
Liquify (accelerated by compatible video card with 512MB VRAM, GPU mode unavailable on Windows XP)
Oil Paint (compatible video card required)
Warp and Puppet Warp (accelerated by compatible video card, GPU mode unavailable on Windows XP)
Field Blur, Iris Blur, and Tilt/Shift (accelerated by compatible video
card supporting OpenCL, GPU mode unavailable on Windows XP)
Lighting Effects Gallery (compatible video card required with 512MB
VRAM, unavailable on Windows XP)
New 3D enhancements (3D features in Photoshop require a compatible video card with 512MB VRAM, unavailable on Windows XP):
Draggable Shadows
Ground plane reflections
Roughness
On-canvas UI controls
Ground plane
Liqht widgets on edge of canvas
IBL (image based light) controller
* Note that all 3D features are unavailable on Windows XP in Photoshop CS6
GPU features added in previous versions of Photoshop
Scrubby Zoom. See Zoom continuously
Heads Up Display (HUD) color picker. See Choose a color while painting
Color sampling ring. Choose colors with the Eyedropper tool
Brush dynamic resize and hardness control. See Resize or change hardness of cursors by dragging
Bristle Brush tip previews. Bristle tip shape options
Rule of thirds crop grid overlay. Crop images
Zoom enhancements. Smooth display at all zoom levels and temporary zoom. See Zoom continuouslyTemporarily zoom an image
Animated transitions for one-stop zoom.
Flick-panning.
Rotate the canvas. Use the Rotate View tool
View nonsquare pixel images. Adjust pixel aspect ratio
Pixel grid. Hide the pixel grid
Adobe Color Engine (ACE).
Draw Brush tip cursors. Resize or change hardness of cursors by dragging
Adobe Bridge GPU features
Preview panel
Full-screen preview
Review mode
See Preview and compare images in Adobe Bridge CS6 Help for information on all of these features.
GPU/OpenGL preferences in Photoshop CS6
The advantages of using a compatible video card (GPU) with Photoshop are that you can experience better performance and more features. Problems can occur if you have an older video card with limited VRAM or if you use other programs at the same time as Photoshop that use the GPU.
Choose Edit > Preferences (Windows) or Photoshop > Preferences (Mac OS).
In the Performance panel, make sure Use Graphics Processor is selected in GPU Settings.
Click Advanced Settings and specify the following options:
Mode > Basic
Mode > Normal
Mode > Advanced Provides the benefits of Normal mode as well as newer OpenGL advances that can result in improved performance.
Use Graphics Processor to Accelerate Computation
Use OpenCL Uses the GPU to accelerate the new blur filters (Field Blur, Iris Blur, and Tilt-Shift) – OpenCL will only be available on newer GPUs that support OpenCL v1.1 or higher
Anti-Alias Guides And Paths Allows the GPU hardware to smooth the edges of drawn guides and paths.
30 Bit Display (Windows only) Allows Photoshop to display 30 bit data directly to screen on video cards that support it
Quick GPU Troubleshooting Steps
You can experience problems such as artifacts, errors, and crashes if there are incompatibilities between Photoshop and the display components that access the GPU.
If you experience crashes, incorrectly rendered windows or objects, redraw issues, or performance issues while running Photoshop, first determine whether OpenGL is causing the problem.
Turn off OpenGL.
Choose Edit > Preferences (Windows) or Photoshop > Preferences (Mac OS).
In the Performance panel, uncheck Use Graphics Processor. Click OK.
Restart Photoshop, and perform the same function.
If the problem recurs while OpenGL Drawing is disabled, OpenGL is not the cause. For additional troubleshooting, see Troubleshoot system errors and freezes | Adobe software on Windows (cpsid_82252) or Troubleshoot system errors and freezes | Adobe software on Mac OS 10.x (cpsid_82414).
If the problem resolves, proceed with the rest of the troubleshooting steps to fix OpenGL.
Make sure that you're using the latest update of Photoshop.Updates fix bugs and issues.
Update the display driver.Updated display drivers can fix many issues, such as crashing, incorrectly rendered objects, and performance problems. Determine what video card you have and go directly to the manufacturer's website (nVidia or ATI/AMD) and download the latest driver. (Note: Simply doing a Windows Update is does not guarantee you are using the latest driver. You must go directly to the nVideo or ATI/AMD websites to get the absolute latest driver.) After you update your driver, turn on Use Graphics Processor in Photoshop preferences.
Reset preferences.
Resetting preferences returns OpenGL settings to their default status. Reset Photoshop preferences by pressing and holding Shift+Ctrl+Alt (Windows) or Shift+Option+Command (Mac OS) immediately after you start Photoshop.
Click Yes when asked if you want to delete the Adobe Photoshop Settings File.
Retry the function that caused the problem.
Change the OpenGL mode to Basic.
Setting the OpenGL mode to Basic uses the least amount of GPU memory and the most basic GPU feature set.
Close all documents.
Choose Edit > Preferences (Windows) or Photoshop > Preferences (Mac OS)
In the Performance panel, click the GPU Settings Advanced Settings button.
Choose Mode > Basic
Restart Photoshop.
If this solution resolves the problem, switch to Normal mode. See if the issue recurs. If the issue recurs, return to Basic mode.
Note: If you’re changing GPU preferences to troubleshoot a problem, re-launch Photoshop after each change.
If you are using more than one video adapter, remove the additional cards.
Multiple video adapters can cause problems with GPU accelerated or enabled features in Photoshop. It's best to connect two (or more) monitors into one video adapter. If you have to use more than one video adapter, make sure that they are the same make and model. Otherwise, crashes and other problems can occur in Photoshop.
Note: Using two video adapters does not enhance Photoshop's performance.
Check your Cache Levels setting.
If you've set your Cache Levels to 1 in Photoshop preferences, you can experience performance issues with GPU features. Reset Cache Levels to the default setting, which is 4.
Choose Edit > Preferences > Performance (Windows) or Photoshop > Preferences (Mac OS)
In the Performance panel, choose Cache Levels > 4.
The GPU Sniffer
To help guard against Photoshop crashes related to bad GPU hardware or drivers, Photoshop employs a small program called the GPU Sniffer. Every time Photoshop is launched, Photoshop launches the sniffer. The sniffer runs rudimentary tests of the GPU and reports the results to Photoshop. If the sniffer crashes or reports a failure status to Photoshop, Photoshop will not use the GPU. The Use Graphics Hardware checkbox in the Performance panel of the Preferences will be unchecked and disabled.
The first time the sniffer fails, Photoshop will display a dialog indicating that it has detected a problem with the GPU. On subsequent launches the dialog will not appear unless the Photoshop preferences are reset.
If the user corrects the problem, either by replacing the video card or by updating the driver, then the sniffer will pass on the next launch and the Use Graphics Hardware checkbox will be enabled and returned to its previous state (enabled or disabled).
Tested video cards for Photoshop CS6
Adobe tested the following video cards before the release of Photoshop CS6. This document lists the video card by series. While the minimum amount of VRAM supported on video cards for Photoshop CS6 is 256MB, some features require 512MB of VRAM to be enabled.
Note: Adobe tested laptop and desktop versions of the following cards. Be sure to download the latest driver for your specific model. (Laptop and desktop versions have slightly different names.)
nVidia GeForce 8000, 9000, 100, 200, 300, 400, 500 series
nVidia Quadro 400, 600, 2000, 4000 (Mac & Win), CX, 5000, 6000
AMD/ATI Radeon 2000, 3000, 4000, 5000, 6000, 7000 series
AMD/ATI FirePro 3800, 4800, 5800, 7800, 8800, 9800, 3900, 4900, 5900, 7900
Intel Intel HD Graphics, Intel HD Graphics P3000, Intel HD Graphics P4000
Note: ATI X1000 series and nVidia 7000 series cards are no longer being tested and are not officially supported in CS6 – some basic GL functionality may be available for both these cards.
Note: 3Dand some Open GL features are disabled on Windows XP, as stated on : http://labs.adobe.com/technologies/photoshopcs6/

I've had several timeout since the pings were started. Got a some response times > 1ms (nothing greater than 7 or 8ms), but no timeouts.

11.1.2.1 Release Delayed Again?

At the end of March, I was hearing April 10. Today I read this:
http://blog.topdownconsulting.com/2011/04/oracle-hyperion-11-1-2-1%E2%80%94now-it-looks-like-summer/
Anbody have good information on whether April 10 is real or not?

<div style="width:660px; font-size: 10pt; font-family: verdana,arial,helvetica,sans-serif; line-height: 20px; text-align: justify; text-justify: inter-ideograph;">
We have selected the most popular papers published by IJCNS in the year 2010 for you. You are welcome to forward this message to your colleagues and friends in the related areas.
International Journal of Communications, Network and System Sciences (IJCNS)
is an international refereed journal dedicated to the latest advancement of communications and network technologies. The goal of this journal is to keep a record of the state-of-the-art research and promote the research work in these fast moving areas.
 IJCNS is published by Scientific Research Publishing which is engaged in the service of publications, organizing academic conferences and promotion of professional journals. SCIRP has an outstanding team of experts as well as the widespread third party relations, which enables our customers to obtain maximum reader impact, and the satisfaction and convenience of timely publications.
<div>
Vol.3 No.1 (Click to view the issue)
Extending the Network Lifetime of Wireless Sensor Networks Using Residual Energy Extraction—Hybrid Scheduling Algorithm
T. V. PADMAVATHY, M. CHITRA
A Maximum Likelihood TOA Based Estimator For Localization in Heterogeneous Networks
Mohamed LAARAIEDH, Stephane AVRILLON, Bernard UGUEN
Achievable Rate Regions for Orthogonally Multiplexed MIMO Broadcast Channels with Multi-Dimensional Modulation
Marthe KASSOUF, Harry LEIB
</div>
<div>
Vol.3 No.2 (Click to view the issue)
Online Detection of Network Traffic Anomalies Using Degree Distributions
Wuzuo WANG, Weidong WU
CPW Fed Double T-Shaped Array Antenna with Suppressed Mutual Coupling
A. DANIDEH, A. A. Lotfi NEYESTANAK
A Topology-Aware Relay Lookup Scheme for P2P VoIP System
Xiuwu ZHANG, Ruifeng GUO, Weimin LEI, Wei ZHANG
</div>
<div>
Vol.3 No.3 (Click to view the issue)
Advances in MIMO Techniques for Mobile Communications-A Survey
Farhan Khalid, Joachim Speidel
Short-Term Load Forecasting Using Soft Computing Techniques
D. K. Chaturvedi, Sinha Anand Premdayal, Ashish Chandiok
A Mobile Ad-Hoc Routing Algorithm with Comparative Study of Earlier Proposed Algorithms
Kumar Verma Pawan, Gupta Tarun, Rakesh Nitin, Nitin Nitin
</div>
<div>
Vol.3 No.4 (Click to view the issue)
Envelope Correlation Parameter Measurements in a MIMO Antenna Array Configuration
Constantinos Votis, George Tatsis, Panos Kostarakis
MIMO Multi Carrier Interleave Division Multiple Access System with Multiuser Detection: Performance Results
Prabagarane Nagaradjane, Sai N. Chandrasekaran, Kuttathatti Srinivasan Vishvaksenan
Comparative Study of Different Space-Time Coding Schemes for MC-CDMA Systems
Lokesh Kumar Bansal, Aditya Trivedi
</div>
<div>
Vol.3 No.5 (Click to view the issue)
Measurements of Balun and Gap Effects in a Dipole Antenna
Constantinos Votis, Vasilis Christofilakis, Panos Kostarakis
Microstrip Low-Pass Elliptic Filter Design Based on Implicit Space Mapping Optimization
Saeed Tavakoli, Mahdieh Zeinadini, Shahram Mohanna
Interoperability of Wireless Networks with 4G Based on Layer Modification
Dilshad Mahjabeen, Aminul Haque Mohammed Sayem, Anis Ahmed, Shahida Rafique
</div>
<div>
Vol.3 No.6 (Click to view the issue)
A Multi-objective QoS Optimization with Fuzzy Based Parameter Setting for Real-Time Multicasting
Satyananda Champati Rai, Bijan Bihari Misra, Ajit Kumar Nayak, Rajib Mall, Sateesh Kumar Pradhan
Flocking Control of a Group of Agents Using a Fuzzy-Logic-Based Attractive/Repulsive Function
Hui Yu, Jigui Jian, Yanjun Shen
An Empirical Examination of Routing Protocols in Mobile Ad Hoc Networks
Kuncha Sahadevaiah, Oruganti Bala Venkata Ramanaiah
</div>
<div>
Vol.3 No.7 (Click to view the issue)
Using Bayesian Game Model for Intrusion Detection in Wireless Ad Hoc Networks
Hua Wei, Hao Sun
Design of Rectangular Dielectric Resonator Antenna Fed by Dielectric Image Line with a Finite Ground Plane
Fatemeh Kazemi, Mohammad Hassan Neshati, Farahnaz Mohanna
Modeling and Analysis of Bandwidth Allocation in IEEE 802.16 MAC: A Stochastic Reward Net Approach
Shanmugam Geetha, Raman Jayaparvathy
</div>
<div>
Vol.3 No.8 (Click to view the issue)
A Sensor Awakening Algorithm for Wireless Multimedia Sensor Networks Three Dimensional Target Tracking
Jing Zhao, Jianchao Zeng
Reliable Wireless Communication for Medical Devices Using Turbo Convolution Code
Debasish Bera, Tapas Chakravarty, Saswat Chakrabarti
Potential Vulnerability of Encrypted Messages: Decomposability of Discrete Logarithm Problems
Boris S. Verkhovsky
</div>
<div>
Vol.3 No.9 (Click to view the issue)
An Efficient Noisy-ICA Based Approach to Multiuser Detection in IDMA Systems
Abdelkrim Hamza, Salim Chitroub, Gérard Salut
Modulation Index Estimation of Frequency and Phase Modulated Signals
Geng Peng, Derong Cai, Zhiqiang He, Zhitao Huang
A New Effective and Efficient Measure of PAPR in OFDM
Ibrahim M. Hussain, Imran A. Tasadduq, Abdul Rahim Ahmad
</div>
<div>
Vol.3 No.10 (Click to view the issue)
Performance Improvement of Wireless Communications Using Frequency Hopping Spread Spectrum
Yang Liu
A Comparative Analysis of Tools for Verification of Security Protocols
Nitish Dalal, Jenny Shah, Khushboo Hisaria, Devesh Jinwala
A Turbo Decoder Included in a Multi-User Detector: A Solution to be Retained
Sylvie Kerouédan, Makram Touzri, Patrick Adde, Samir Saoudi
</div>
<div>
Vol.3 No.11 (Click to view the issue)
Service Networks Topological Design
Boris S. Verkhovsky
A Routing Strategy with Link Disruption Tolerance for Multilayered Satellite Networks
Gang Zheng, Yanxin Guo
Extraction of Buried Signals in Noise: Correlated Processes
Nourédine Yahya Bey
</div>
<div>
Vol.3 No.12 (Click to view the issue)
Enhanced Euclid Algorithm for Modular Multiplicative Inverse and Its Application in Cryptographic Protocols
Boris S. Verkhovsky
Extraction of Signals Buried in Noise: Non-Ergodic Processes
Nourédine Yahya Bey
A Synchronous and Deterministic MAC Protocol for Wireless Communications on Linear Topologies
Daniele De Caneva, Pier Luca Montessoro
</div>
The journal publishes the highest quality, original papers included but not limited to the fields:
<tr>
 <td style="vertical-align:top">
 <ul style="list-style:disc;margin-left:18px; margin-top:2px; padding:0;">
 <li>Ad Hoc and Mesh Networks</li>
 <li>Coding, Detection and Modulation</li>
 <li>Cognitive Radio</li>
 <li>Communication Networks Architecture Design</li>
 <li>Cooperative Communications</li>
 <li>Embedded Distributed Systems</li>
 <li>Global Networks</li>
 <li>Heterogeneous Networking</li>
 <li>MIMO and OFDM Technologies</li>
 <li>Network Protocol, QoS and Congestion Control</li>
 <li>Network Reliability, Security and Privacy</li>
 <li>Network Survivability</li>
 <li>Next Generation Network Architectures</li>
 <li>Reconfigurable Networks</li>
 <li>Resource Management</li>
 <li>Satellite Communication</li>
 <li>Sensor Networks</li>
 <li>Simulation and Optimization Tools</li>
 <li>UWB Technologies</li>
 <li>Wave Propagation and Antenna Design</li>
 <li>Wireless Personal Communications</li>
 </ul>
 </td>
</tr>
We are also interested in short papers (letters) that clearly address a specific problem, and short survey or position papers that sketch the results or problems on a specific topic. Authors of selected short papers would be invited to write a regular paper on the same topic for future issues of the IJCNS.
You are welcome to submit your manuscripts!
</div>
Edited by: 850791 on 2011-4-11 下午8:56

Multiple-point Hardware And Software Failures in Two, Separate and Not-connected Computers At The Same Time...

A few days ago, I was working on a restoration of a 100-years-or-so-old Calculus book on one of my Linux based computers, while my other computer with the Microsoft Windows Vista operating system was serving as Broadcast TV receiver with its USB HDTV tuner
in the afternoon. The weather in Los Angeles was summer-like in November, with clear skies and 90 degree Fahrenheit temperatures. All of a sudden, my Linux based computer halted in the middle of the processing it had performed hundreds of times
before in hotter days. It would not restart. The entire boot block of the disk seemed to have been garbled. This did not seem even feasible at all, so I decided to shut its power off for a while. It came back up after a while,
and everything looked normal. Then, it did the same thing again. I decided to open its cover and check on its multiple fans as there was nothing else that could go wrong.
I then noticed that the computer with the Microsoft Windows Vista Operating system which had been receiving the broadcast TV, was displaying a freshly-booted log-in screen. It had "Blue-screened" while I was working on the other computer
across the large room. This again did not seem any feasible as there had been utterly no connection between these two computers. Even the AC power line circuit was different. Furthermore, this computer had the most extensive air-cooling system
I had built to have it work through 107 degree Fahrenheit temperatures indoors. Anyway, I logged back in and started the broadcast TV reception again. Sure enough, after a while it "blue-screened" one more time...
I went back to the Linux-based computer and found all of its fans operating, but with somewhat hotter disk drives. The problem was that in hotter days, the same computer had cooler disk drives with nothing different. I concluded that somehow
the 80 mm fan mounted in the front side of the case, with its side with rotating blades clamped on the perforated part of the steel case serving as the fan grill, was starting up fine. But, as the time passed the spring-loaded rotating hub was slowly
drawn toward the perforated steel case by two means: The partial vacuum formed by the suction generated by the blades of the fan, and by the magnetic attraction of the rotating hub with electro-magnets in it to the partially magnetized, perforated steel casing.
The first effect was always there, so it was not the real cause, but once something else came along, it really helped the latter. The hub was slowly drawn to the perforated steel casing due to magnetic attraction, with the holes in the casing
inducing a huge air-drag on the hub blades as there was no by-pass around to supply the extra-air needed to reduce the partial vacuum. In addition, the rotating hub with the electro-magnets now was very close to the conducting metal surface and the induced
eddy-currents in the metal by the moving electro-magnets had added even more drag on the rotating hub, causing it to come nearly to a halt. The disk drive electronics was heating up and was causing DMA access faults which in turn caused the Linux kernel
to panic and halt.
Well, this was nearly unbelievable, but true... I had not brought any magnets into the room and I still do not know how the computer case got magnetized. It has been working at the same location for years. The solution was to move the fan
away from the perforated steel casing a little so that some air could come in through the gaps on the sides of the fan (hence supplying a by-pass), reducing the partial vacuum in front of the fan. This kept the rotating hub far enough away to prevent
the massive induced eddy-current drag from slowing the fan down to a halt. The computer now works perfectly with the very same fan as it has had been doing for years.
The real solution is to saw the perforated part of the steel casing in front of the fan away, and to replace it with a better fan grill. The best fan grill material I have found is the finely perforated, thin, black aluminum sheet that is usually
used as a car audio speaker grill. In fact, I use these in my Microsoft Windows Vista based computer. The fans are quieter, with more air flow. It also keeps dust away and you can brush the collected dust off easily.
The next problem was the halting of the computer with the Microsoft Windows Vista operating system with a blue-screen. The fans in it could not be the cause of this, as it had already had the best improvements I could put in it, with even
externally powered fans that did not load the computer power supply. And, all of the fans were working well. In the meantime, the Microsoft November 2014 updates for the Microsoft Windows Vista came out, and as usual I told the computer to
load and to implement them. Sure enough, the computer again "blue-screened" in the middle of the update procedure.
That was somewhat too much, but there was nothing else I could do other than to debug it. I had not changed anything in the computer and its power supply, completely internally updated by myself a few years ago, was working perfectly. Whatever
was causing it was not in the hardware. It was not in the November 2014 software updates either as it "blue-screened" before those were announced. I brought the computer back up after several disk and other software checks and after the
completion of the updates, I gingerly turned the network modem on. I then sent the reports on the six failures (three "blue-screen" type failures and three "Anti-malware Executable" failures) to Microsoft with all of details
requested using the Microsoft Windows Vista problem reporting system. Within minutes, the Microsoft came up with a diagnosis that the USB driver code in the system had a serious bug. I had not changed this code in years. It suggested that
I should use the "Microsoft Fix-It" for this problem and it pointed to a link to download it. I did download it. It ran and the "blue-screen" problem just went away, as if it had never been there...
-- Yekta

I ordered the capacitors on Friday and they arrived on Monday, November 17, 2014. I removed the motherboard from the machine, by removing all PCI and AGP boards, drive and fan connectors and the computer power supply first. The motherboard then
simply unbolted from the case and came out with the CPU fan assembly still attached.
I wrapped the solder side of the motherboard with aluminum foil and set up a work place with the aluminum foil under the motherboard and myself electrically well grounded. Here came another surprise: There were four more capacitors of the same
kind just behind the CPU fan assembly and their tops were also deformed with one of them leaking the electrolyte inside from the the top. Luckily, I had ordered more than two capacitors to get the quantity discount and the lower rate of shipping.
I do use them in other circuits I occasionally build.
Technically, the only thing one needed to do was to unsolder the six old capacitors from the motherboard and to solder six new ones in in their place with the correct polarities. However, due to fact that the capacitors span the 3.3 V power plane and
the ground plane in the multi-layer motherboard, it is nearly impossible to unsolder these capacitors using regular, fine-tip soldering irons. The thick copper of the power and the ground planes carry the soldering iron heat away very fast, preventing
the solder from melting quickly. Continuous application of heat at this point will simply burn the internal insulating epoxy layers and cause shorts inside the motherboard which are impossible to fix in any reasonable amount of time.
The only reasonable way to remove these capacitors was to dismantle the capacitors from the top leaving their already soldered leads in place. The new capacitors were then tack soldered to these stubs using lead-free, hard solder. However, the
CPU fan assembly and the CPU itself had to be removed from the board to be able to work on these capacitors.
To dismantle the capacitors from the top, I first drilled small holes at the tops of the capacitors at the intersections of the indentations using the tip of a hobbyist's knife. I then used needle nosed pliers to peel back the triangular sections
of aluminum from the center at the tops to their bases at the top edges of the capacitors. Next, I removed the plastic layers covering the outside of the capacitors by scoring the plastic layers first from the bottom to the top using the tip of
the hobbyist's knife and peeling the plastic layers off starting at the cut. The following step was to cut the aluminum cans of the capacitors from the top to the bottom using the hobbyist's knife like a can opener. One could not use a saw like
tool here to accomplish the feat as the saws generated very fine metal chips which were very hard to remove and were certain to cause shorts in the densely populated mother board. The cans were then peeled off the rest of the capacitors starting from
the top at the cuts using needle nose pliers, revealing the spiral-wound metal-paper layers of the capacitors.
The wound layers of the capacitors were peeled off layer by layer by cutting into the layers from the top to the bottom, leaving only the two aluminum electrodes which were crimped and soldered to the leads of the capacitors. The picture below shows
the six capacitors with one of them dismantled (left) and with all of them dismantled (right):
The black disks below the aluminum electrodes are the rubber plugs covering the bottoms of the capacitors. The rubber plugs were then cut in half using the hobbyist's knife and removed using the needle nose pliers. It was not possible to
solder to the aluminum electrodes, so these were trimmed at the point they were crimped on the leads of the capacitors, leaving only the stubs of the capacitors' leads soldered to the motherboard.
The new capacitors with suitably trimmed leads were then soldered to these stubs with the correct polarities using lead-free, hard solder. The capacitors were lightly bonded together using a flexible glue to prevent them from moving. The picture
below shows the new capacitors as installed into the motherboard:
I then assembled everything back together and turned the computer on. The BIOS complained on the boot screen that the CPU was out of its socket and it needed to be reset. I set BIOS parameters correctly to their original values. The computer
came up and worked without any problems. I typed this message on my newly repaired computer running the Microsoft Windows Vista operating system.
By the way, the manufacturing date on the motherboard is 09/12/2002 and the CPU is a Socket-478, 2.4 GHz, Intel Pentium-4.
-- Yekta

Ground Plane adj.

Similar Messages

Maybe you are looking for